Bu araştırma Avrupa toplumun yedinci çerçeve programı (FP7/2007-2013) fon hibe sözleşme numarası 305436 altında aldı STELLAR.

The local medical ethical committee and ethical advisory board of the European consortium (STELLAR) approved the research and collection of human transplant grade kidneys discarded mainly for surgical reasons. Research consent was given for all kidneys.
1. Preparations for Cell Culture
<ol>
	<li>Prepare a pool of platelet lysates.
	<ol>
		<li>Store the platelets that have expired for less than 2 d in -80 &#176;C until use (for a maximum of 1 year). 
		NOTE: The platelets were originally sourced from a commercial vendor. Hospital surplus material distributed by the local blood bank were obtained.</li>
		<li>Thaw the platelets of at least 5 donors (preferably 10) O/N at 4 &#176;C.</li>
		<li>Pool the platelets in a large sterile bottle, transfer to conical centrifuge tubes and spin down for 10 min at 1,960 x g at 4 &#176;C. 
		NOTE: The volume of platelets depends on the number of donors and the amount of hospital surplus material per donor.</li>
		<li>Pipette the supernatant to blood bags (50 mL/bag) through the barrel of a 50 mL syringe. Store at -80 &#176;C.</li>
	</ol>
	</li>
	<li>Preparation of cell culture medium.
	<ol>
		<li>Defrost one bag of platelet lysates in a water bath at 37 &#176;C.</li>
		<li>Add 1 L (i.e. 2 bottles) of Minimum Essential Medium - alpha modification (alphaMEM), 5 mL 200 mM glutamine, and 20 mL of penicillin (5,000 U/mL)/streptomycin (5,000 &#181;g/mL) (pen/strep) to the bag.</li>
		<li>Incubate for 3 h at 37 &#176;C.</li>
		<li>Shake the bag for degelling by gently tapping on the bag when the bag is resting on a flat surface.</li>
		<li>Filter the 5% platelet lysates medium by pulling the lysates through the filter of the transfusion system with a sterile 50 mL syringe.</li>
		<li>Aliquot the medium in 50 mL tubes and store in -80 &#176;C until use. 
		NOTE: Every new batch of platelet lysates is tested in cell culture and compared to the previous batch by growing cells of interest (bmMSCs or kPSCs) to confluency in both batches. In cell numbers and viability, the kPSCs or bmMCs grown in the new batch should not differ more than 10%, and the marker expression of CD73, CD90, CD105 and CD31, CD34 and CD45 as analyzed by flow cytometry should not differ. The methods of cell culture are described in section 6 of the protocol (Culture of kPSC).</li>
	</ol>
	</li>
</ol>
2. Preparations for Cell Harvest
<ol>
	<li>Preparation of solutions.
	<ol>
		<li>Prepare the plain medium by adding 10 mL of pen/strep to 500 mL (1 bottle) of Dulbecco&#39;s Minimum Essential Medium (DMEM)-F12.</li>
		<li>Prepare the washing medium by adding 50 mL of Normal Human Serum (NHS) and 10 mL of pen/strep to 1 bottle of DMEM-F12.</li>
		<li>Prepare the enzyme-stock buffer by adding 2.9 mL 1 M 4-(2-hydroxyethyl)-1-piperazineethanesulfonic acid (HEPES), 1.2 mL NaHCO3 2.5% [w/v] and 160 &#181;L CaCl2 (1 M) to 160 mL University of Wisconsin solution.</li>
		<li>Prepare the collagenase solution by slowly adding 20 mL of enzyme stock buffer to the bottle of GMP-grade collagenase containing &#62;2,000 U/bottle collagenase. Dissolve at 4 &#176;C for approximately 40 min. Gently shake several times during the dissolving period.</li>
		<li>Prepare the freeze medium by adding 5 mL dimethyl sulfoxide (DMSO) to 45 mL NHS.</li>
	</ol>
	</li>
	<li>Preparation of perfusion tray (Figure 1A).
	<ol>
		<li>Clean the flow cabin and cover with surgical drapes. Heat a water bath to approximately 40 - 45 &#176;C to heat the perfusion tray to 37 &#176;C. Put on surgical gowns and surgical gloves.</li>
		<li>Connect a sterilized perfusion tray to the water bath to preheat the perfusion tray with warm water. Make sure that there is no air in the perfusion tray by starting with the perfusion tray in the vertical position. If necessary add more water to the water bath to prevent air infusion into the perfusion tray.</li>
		<li>Place the LS25 tube in the pump. Leave both sterile ends of the tube in the flow cabinet. Place a Kocher&#39;s forceps on one end of the tube and allow to rest on the bottom of the perfusion tray. Place a sterile gauze on top of the tube to prevent obstruction. Attach a Luer connector on the other tube end.</li>
		<li>Add approximately 100 mL of plain medium into the perfusion tray and start flushing the tube on a pump speed of 100 mL/min.</li>
	</ol>
	</li>
</ol>
3. Kidney Cell Isolation
<ol>
	<li>Preparation of the kidney.
	<ol>
		<li>Remove the kidney from the double sterile bags and place on the sterile perfusion tray (Figure 1B). Remove the perirenal adipose tissue and kidney capsule with scissors and gentle tearing (Figure 1C) and identify the renal artery on the aortic patch as shown in Figure 1D.</li>
		<li>Cannulate the renal artery with the accessory spike, fix with a sterilized tie-rip, and attach to the pump tube end with the Luer connector while the pump is on. If the tubes are not completely filled, first add more medium to the tray and flush tubes by starting the pump (Figure 1E - F). Flush the kidney with plain medium via the pump with a flow of 100 mL/min.</li>
	</ol>
	</li>
	<li>Collagenase treatment and kidney cell isolation.
	<ol>
		<li>Add collagenase (20 mL, &#62;2,000 U) and DNase (2.5 mL, 1 mg/mL) to the perfusion tray (Figure 1G). Turn the kidney from time to time gently by hand. Wait until the kidney becomes soft and the perfusion liquid becomes less transparent (approximately 30 - 40 min).</li>
		<li>Gently massage the kidney (Figure 1H) until a cell suspension is obtained (Figure 1I). Remove non-digested material and the spike in the renal artery.</li>
	</ol>
	</li>
	<li>Washing and collection of kidney cells.
	<ol>
		<li>Add 50 mL of the NHS to the cell suspension. Drain the cell suspension from the perfusion tray by putting the pump at low flow and placing the tube first connected to the kidney above the 50 mL tubes (Figure 1J).</li>
		<li>Centrifuge at 300 x g for 7 min at 4 &#730;C and remove the supernatant. Wash the pellets with washing medium containing 10% NHS and again centrifuge at 300 x g for 7 min. Repeat washing once more. Measure the volume of the cell pellets and add an equal volume of cell culture medium.</li>
		<li>Either cryopreserve the cells from here by adding freezing medium 1:1 to the cell suspension and store in cryogenic vials according to standard protocols, or continue to culture the cells (section 4). 
		NOTE: The cell suspension contains cell clumps and requires extra steps to obtain single cells, which results in an increase in cell death. Therefore, the cells are kept in suspension and are not counted at this stage.</li>
	</ol>
	</li>
</ol>
4. Cell Culture of Crude Kidney Cells
<ol>
	<li>Add approximately 1 mL of the cell suspension to 24 mL of alphaMEM 5% platelet lysates (cell culture medium) in a T175 cell culture flask (Figure 1K) and culture at 37 &#176;C, 5% CO2. Remove the medium and cell debris after 2 d&#160;from the adherent cells and refresh the medium with 25 mL of cell culture medium.</li>
	<li>Refresh the culture medium twice a week by removing half of the medium (12.5 mL) and adding fresh medium (12.5 mL) using aseptic techniques.</li>
	<li>Culture until confluent (usually 5 - 7 d) (Figure 1L). Remove the medium, wash twice with PBS and trypsinize the cells by adding 5 mL trypsin to each T175 flask for 5 min at 37 &#176;C. Wash in culture medium and centrifuge at 490 x g for 5 min and remove the supernatant.</li>
</ol>
5. Cell Enrichment for NG2 by Magnetic Cell Separation (Figure 1M)
<ol>
	<li>Prepare the cell separation buffer according to manufacturer&#39;s protocol.</li>
	<li>Resuspend the trypsinized kPSCs in 10 mL cell separation buffer. Centrifuge at 490 x g for 5 min, discard the supernatant and resuspend the cells in 300 &#181;L cell separation buffer.</li>
	<li>Add 100 &#181;L FcR blocking reagen/5 x 107 cells, add 100 &#181;L anti-melanoma (NG2) beads per 5 x 107 cells, and incubate for 30 min at 4 &#176;C. Separate the NG2-positive fraction according to manufacturer&#39;s protocol. Add 10 mL of medium and centrifuge cells for 5 min at 490 x g.</li>
	<li>Count the cells using a B&#252;rker counting chamber according to manufacturer&#39;s protocol. Seed the cells in a culture flask (approximately 4 x 103 cells/cm2) and incubate. 
	NOTE: Seed the cells in the following concentrations: &#60;250,000 in a T25 flask, 250,000 - 500,000 in a T75 flask, and 700,000 - 800,000 in a T175 flask. After magnetic cell enrichment, a positive fraction of approximately 1 - 2% is isolated. However, as this step is cell enrichment and not cell sorting, other cell types will be present in the culture (Figure 1N). After several passages (usually around 4 - 5), only a homogenous kPSC-population is present (Figure 1P).</li>
</ol>
6. Culture of kPSCs
<ol>
	<li>Refresh the medium twice a week by removing half of the medium and replace it with freshly thawed culture medium (Figure 1N). 
	NOTE: The kPSCs tend to be more viable and proliferative when only half of the medium is refreshed.</li>
	<li>Passaging of kPSCs. 
	NOTE: Passage the kPSCs at either 90 - 100% confluency, or when 3D structures appear (see Figure 1O), or when there hasn&#39;t been cell growth for more than a week. The latter two particularly might occur at early passages after cell enrichment. In this case, after passaging, the cells will usually start to grow again in monolayer culture (Figure 1P).
	<ol>
		<li>Remove the medium from the 90 - 100% confluent cells (keep the medium for later use). Wash the flask twice with PBS (1 mL in T25, 5 mL in T75, 10 mL in T175). Add trypsin (0.5 mL in T25, 2 mL in T75, 5 mL in T175) and incubate for 5 min at 37 &#176;C. Add the old medium to the flask and resuspend gently.</li>
		<li>Transfer to a 15&#160;or 50 mL tube (depending on the volume) and centrifuge at 490 x g for 5 min. Count the viable cells and plate &#60;250,000 in a T25, 250,000 - 500,000 in a T75, or 700,000 - 800,000 in a T175 (approximately 4 x 103 cells/cm2).</li>
	</ol>
	</li>
	<li>Test the kPSCs at passage 5 or 6 (e.g., scratch assay, section 7). 
	NOTE: Characterize the propagated cells by flow cytometry using standard protocols. Marker expression of NG2, PDGFR-&#946;, CD146, CD73, CD90, CD105, HLA-ABC should all be positive and CD31, CD34, CD45 and HLA-DR should be negative. Test for mycoplasma, bacteria and fungi in the culture medium according to standard protocols of the clinical microbiology lab. Test the kPSCs functionally in a kidney epithelial wound scratch assay. Experiments are usually performed with sterile, flow cytometry-confirmed homogeneous kPSC populations with wound healing capacity between passage 6-8.</li>
	<li>Cryopreserve the kPSCs by adding 0.5 mL cryopreservation medium to 0.5 mL cell suspension (2 million cells per mL of culture medium) using standard protocols. 
	NOTE: After thawing, seed the kPSCs at a higher density (106&#160;cells in a T175).</li>
</ol>
7. Functional Test of kPSCs: Kidney Epithelial Wound Scratch Assay
<ol>
	<li>Culture the kPSCs in a 6-well plate at a density of 200,000 cells/well in 2 mL culture medium. After 48 h of culture at 37 &#176;C, 5% CO2, collect the supernatant. This is the conditioned medium.</li>
	<li>Seed the HK-2 (proximal tubular epithelial cells)17 in 2 mL of Proximal Tubular Epithelial Cell (PTEC) medium consisting of a 1:1 ratio of DMEM-F12 supplemented with insulin (5 mg/mL), transferrin (5 mg/mL), selenium (5 ng/mL), hydrocortisone (36 ng/mL), triiodothyrinine (40 pg/mL), epidermal growth factor (10 ng/mL) and pen/strep, in a density of 500,000 cells per well in a 6-well cell culture plate.</li>
	<li>Culture for 48 h at 37 &#176;C, 5% CO2. Remove the cell culture medium of the HK-2s and create a scratch wound in the monolayer of HK-2s by making a scratch with the tip of a yellow pipette point from the top to the bottom of the well. Wash the HK-2s with PBS and add the conditioned medium of the kPSCs or control medium. Mark on the bottom of the plate the area to be imaged. 
	NOTE: The HK-2s should be confluent. Image two areas per well.</li>
	<li>Image the scratch at 4, 8, 12 and 24 h at the same marked position with an inverted bright-field microscope.</li>
	<li>Measure the scratch area in Image J using the polygon selection tool to determine the percentage of closure.</li>
</ol>

<ol>
	<li>Friedenstein, A. J., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Precursors+for+fibroblasts+in+different+populations+of+hematopoietic+cells+as+detected+by+the+in+vitro+colony+assay+method.">Precursors for fibroblasts in different populations of hematopoietic cells as detected by the in vitro colony assay method.</a> Exp Hematol. 2 (2), 83-92 (1974).</li><li>Dominici, M., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Minimal+criteria+for+defining+multipotent+mesenchymal+stromal+cells.+The+International+Society+for+Cellular+Therapy+position+statement.">Minimal criteria for defining multipotent mesenchymal stromal cells. The International Society for Cellular Therapy position statement.</a> Cytotherapy. 8 (4), 315-317 (2006).</li><li>Pittenger, M. F., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Multilineage+potential+of+adult+human+mesenchymal+stem+cells.">Multilineage potential of adult human mesenchymal stem cells.</a> Science. 284 (5411), 143-147 (1999).</li><li>Leuning, D. G., Reinders, M. E., de Fijter, J. W., Rabelink, T. J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Clinical+translation+of+multipotent+mesenchymal+stromal+cells+in+transplantation.">Clinical translation of multipotent mesenchymal stromal cells in transplantation.</a> Semin Nephrol. 34 (4), 351-364 (2014).</li><li>Reinders, M. E., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Autologous+bone+marrow-derived+mesenchymal+stromal+cells+for+the+treatment+of+allograft+rejection+after+renal+transplantation:+results+of+a+phase+I+study.">Autologous bone marrow-derived mesenchymal stromal cells for the treatment of allograft rejection after renal transplantation: results of a phase I study.</a> Stem Cells Transl Med. 2 (2), 107-111 (2013).</li><li>Perico, N., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Autologous+mesenchymal+stromal+cells+and+kidney+transplantation:+a+pilot+study+of+safety+and+clinical+feasibility.">Autologous mesenchymal stromal cells and kidney transplantation: a pilot study of safety and clinical feasibility.</a> Clin J Am Soc Nephrol. 6 (2), 412-422 (2011).</li><li>Perico, N., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Mesenchymal+stromal+cells+and+kidney+transplantation:+pretransplant+infusion+protects+from+graft+dysfunction+while+fostering+immunoregulation.">Mesenchymal stromal cells and kidney transplantation: pretransplant infusion protects from graft dysfunction while fostering immunoregulation.</a> Transpl Int. 26 (9), 867-878 (2013).</li><li>Tan, J., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Induction+therapy+with+autologous+mesenchymal+stem+cells+in+living-related+kidney+transplants:+a+randomized+controlled+trial.">Induction therapy with autologous mesenchymal stem cells in living-related kidney transplants: a randomized controlled trial.</a> JAMA. 307 (11), 1169-1177 (2012).</li><li>Crisan, M., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=A+perivascular+origin+for+mesenchymal+stem+cells+in+multiple+human+organs.">A perivascular origin for mesenchymal stem cells in multiple human organs.</a> Cell Stem Cell. 3 (3), 301-313 (2008).</li><li>Sacchetti, B., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=No+Identical+"Mesenchymal+Stem+Cells"+at+Different+Times+and+Sites:+Human+Committed+Progenitors+of+Distinct+Origin+and+Differentiation+Potential+Are+Incorporated+as+Adventitial+Cells+in+Microvessels.">No Identical "Mesenchymal Stem Cells" at Different Times and Sites: Human Committed Progenitors of Distinct Origin and Differentiation Potential Are Incorporated as Adventitial Cells in Microvessels.</a> Stem Cell Reports. 6 (6), 897-913 (2016).</li><li>Chen, W. C., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Human+myocardial+pericytes:+multipotent+mesodermal+precursors+exhibiting+cardiac+specificity.">Human myocardial pericytes: multipotent mesodermal precursors exhibiting cardiac specificity.</a> Stem Cells. 33 (2), 557-573 (2015).</li><li>Dekel, B., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Isolation+and+characterization+of+nontubular+sca-1+lin-+multipotent+stem/progenitor+cells+from+adult+mouse+kidney.">Isolation and characterization of nontubular sca-1+lin- multipotent stem/progenitor cells from adult mouse kidney.</a> J Am Soc Nephrol. 17 (12), 3300-3314 (2006).</li><li>Li, J., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Collecting+duct-derived+cells+display+mesenchymal+stem+cell+properties+and+retain+selective+in+vitro+and+in+vivo+epithelial+capacity.">Collecting duct-derived cells display mesenchymal stem cell properties and retain selective in vitro and in vivo epithelial capacity.</a> J Am Soc Nephrol. 26 (1), 81-94 (2015).</li><li>Pelekanos, R. A., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Comprehensive+transcriptome+and+immunophenotype+analysis+of+renal+and+cardiac+MSC-like+populations+supports+strong+congruence+with+bone+marrow+MSC+despite+maintenance+of+distinct+identities.">Comprehensive transcriptome and immunophenotype analysis of renal and cardiac MSC-like populations supports strong congruence with bone marrow MSC despite maintenance of distinct identities.</a> Stem Cell Res. 8 (1), 58-73 (2012).</li><li>Leuning, D. G., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Clinical-Grade+Isolated+Human+Kidney+Perivascular+Stromal+Cells+as+an+Organotypic+Cell+Source+for+Kidney+Regenerative+Medicine.">Clinical-Grade Isolated Human Kidney Perivascular Stromal Cells as an Organotypic Cell Source for Kidney Regenerative Medicine.</a> Stem Cells Transl Med. , (2016).</li><li>Bruno, S., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Isolation+and+characterization+of+resident+mesenchymal+stem+cells+in+human+glomeruli.">Isolation and characterization of resident mesenchymal stem cells in human glomeruli.</a> Stem Cells Dev. 18 (6), 867-880 (2009).</li><li>Ryan, M. J., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=HK-2:+an+immortalized+proximal+tubule+epithelial+cell+line+from+normal+adult+human+kidney.">HK-2: an immortalized proximal tubule epithelial cell line from normal adult human kidney.</a> Kidney Int. 45 (1), 48-57 (1994).</li><li>Nijhoff, M. F., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Glycemic+Stability+Through+Islet-After-Kidney+Transplantation+Using+an+Alemtuzumab-Based+Induction+Regimen+and+Long-Term+Triple-Maintenance+Immunosuppression.">Glycemic Stability Through Islet-After-Kidney Transplantation Using an Alemtuzumab-Based Induction Regimen and Long-Term Triple-Maintenance Immunosuppression.</a> Am J Transplant. , (2015).</li></ol>

D.G.L., M.A.E., ve T.J.R. bir patent başvurusu ile ilgili bu araştırma ile ilişkilidir. Diğer yazarlar ifşa gerek yok.

Perivasküler hücreleri pankreas, yağ, kıkırdak ve böbrek9,15,16da dahil olmak üzere birçok farklı insan solid organ, izole edilmiştir. Pek çok yöntem, ancak, küçük parçalara ve daha sonra sindirim enzimleri ile tedavi doku örnekleri temel alır. Ayrıca, bu genellikle klinik sınıf ürünleri ile gerçekleştirilir. Bu bu stratejileri daha az doğrudan klinik çeviri için uygun klinik-grade hücrelerinin büyük miktarlarda gerekli nerede yapar.
İşte insan kPSCs bir roman yalıtım yöntemini perfüzyon klinik sınıf enzimler ve malzemelerle dayalı tüm organlar için göstermektedir. Bizim Merkezi18klinik uygulamada için kullanılmakta olan klinik adacıkları of Langerhans yalıtım protokolden adapte iletişim kuralıdır.
Bu ilk klinik sınıf yöntem nereye kPSCs büyük miktarlarda elde edilebilir. Değişkenlik hücre verim büyük ölçüde bağımlı verici. Ancak, ne zaman biz şu anda üç farklı bağış ham hücre süspansiyon bir kısmını elde hücre verim yaygınlaştırılması, teorik olarak, 2.7 x 1012 kPSCs donör başına ortalama bir verim elde edilebilir. MSC tedavisi genellikle 1-2 x 106 hücreler/kg vücut ağırlığı42 hücre infüzyon oluşur, bu hücre sayıları birden fazla hastada allojenik tedavisi için yeterli şunlardır.
Yalıtım yordamdaki bir kritik adım collagenase sindirim süresi kadardır. Sindirim süresi çok kısa olduğu durumlarda hangi kültür için daha zor olacak büyük kümeleri doku kalır. Perfüzyon dönem çok uzun olduğunda, artan hücre ölümü gözlenen. Bu nedenle, böbrek yumuşak ve sıvı daha az şeffaf olmaya başladığı anda böbrek hafifçe masaj ve collagenase tedavi kesilmelidir.
Başka bir önemli adım NG2 hücre zenginleştirme sonra hücrelerin kültürdür. NG2 hücre zenginleştirme bazen sonra Perivasküler hücreleri çoğalırlar veya 3D yapılar büyümeye başlar başlamaz. Bu durumda, hücreleri trypsinized ve reseeded olduğunda, hücreleri genellikle monolayer kültüründe büyümeye başlayacak.
Malzeme başlangıç olarak, esas olarak cerrahi nedenlerle atılan insan nakli sınıf böbrekler kullanılmıştır. Bu büyük fibroz olmadan fonksiyonel organları vardır. Bu nispeten nadir olduğu gibi bu bir sınırlama olabilir kabul ve organ kaynak elde etmek zor. Explanted böbrekler başka bir kaynağı olabilir; Ancak, bağlı olarak böbrek explantation nedeni, bu böbrekler daha fazla fibrozis ve böylece myofibroblasts içerebilir ve myofibroblasts izole ve Perivasküler hücreler yerine kültürlü olabilir bu yana bu nedenle özen gösterilmelidir.
KPSCs izole olarak bu protokolü göstermek ile organo-typic özellikleri böbrek epitel ile şifa kapasiteleri15, kPSCs böbrek hastalıklarında hücre tedavisi yara ve nakli ilginç bir gelecek uygulama olurdu. Bu amaçla, hücre/ürün teslimat birkaç stratejileri vardır. İlk strateji kPSCs, IV infüzyon şu anda bmMSC klinik çalışmalarda kullanılan gibidir. Başka bir ilginç uygulama kPSCs veya makine perfüzyon nakli önce kPSC atılır faktörler kullanımıdır. Bu şekilde, hangi sonra nakli için geliştirilmiş Böbrek fonksiyonlarının neden olabilir explanted böbrek kalitesini artırmak. Hem stratejileri için kPSCs daha fazla klinik amaçlar için keşfetmek için ilginç bir yeni hücre kaynağı vardır.

Mezenkimal Stromal hücre (MSCs) kemik iliği aslında izole edildi immün düzenleyici hücrelerdir. Onlar onların iğ şeklinde Morfoloji, yağ, kemik ve kıkırdak ve plastik bağlılık ayırt etmek için yeteneği ile karakterizedir. MSCs stromal işaretleri CD73, CD90, işaretçileri CD31 ve CD451,2,3için negatif olurken CD105 hızlı. MSCs doku homeostatik ve immunomodulatory kapasiteleri nedeniyle hücre tedavisi için umut verici bir aday olduğunu. bmMSCs şu anda böbrek hastalıkları ve başka bir yerde4gözden olarak böbrek nakli dahil olmak üzere çeşitli hastalıklar için klinik çalışmalarda incelendiği.
Daha önce bu Perivasküler yağ dokusu da dahil olmak üzere birkaç farklı solid organ, hücreleri, plasenta ve iskelet kası özellikleri MSCs9ile paylaşan gösterilmiştir. Ancak, bu hücreler aynı zamanda organotypic onarım10neden olabilir doku özgü işlevleri sergi. İnsan miyokardiyal Perivasküler hücreleri, örneğin, hipoksi sonra anjiogenik yanıt teşvik ve diğer dokulardan izole Perivasküler hücreleri bu potansiyeller11belli etmedi ise cardiomyocytes farklı.
Perivasküler stromal hücreler de fare12,13,14 ve insan böbrek15,16ayrılmış olabilir. Yaygın olarak kPSCs ile karakterize olan ve bunları bmMSCs karşılaştırıldığında. KPSCs, bmMSCs için benzer immünsüpresif kapasitesine sahip ve vasküler pleksus oluşumu destekleyebilir bulduk. Ancak, doku hücre tipleri, HoxD10 ve HoxD11 nephrogenic transkripsiyon faktörleri de dahil olmak üzere bir organotypic transkripsiyon ifadesi imzasını gösterdin kPSCs olarak arasında belirli farklar vardır. kPSCs, bmMSCs, aksine myofibroblast stimülasyon ile TGF-β sonra dönüşüme değil ve adiposit ayırt koyamadık. Ayrıca, kPSCs epitel bütünlük içinde bir böbrek borulu epitel yara karalama yöntemi, bmMSCs ile gözlenen değil bir fenomen hız. Bu gelişmiş yara onarım hepatosit büyüme faktörü yayın aracılı. Ayrıca, kPSCs böbrek yaralanma Akut böbrek yaralanma15, bir fare modeli iyileştirmiştir. Bu nedenle, kPSCs üstün böbrek onarım kapasitesine sahip görünmektedir ve böbrek hastalıklarında hücre tedavisi için ilginç bir yeni kaynak vardır.
Hücre tedavisi amacıyla kPSCs kullanabilmek için kPSCs klinik sınıf enzimler ve protokolleri ile klinik sınıf şekilde izole. Ayrıca, birkaç kPSCs 1 donör tedavisinde edebilmek için yeterli hücre sayıları alınmalıdır. İşte ayrıntılı, kPSCs gelen tüm organ nakli sınıf böbrekler, klinik sınıf izolasyon prosedürü yeterli sayıda klinik hücresel tedavi için kullanılmak üzere hücre verimli göstermektedir.

<table><tbody><tr><td>Baxter bags</td><td>Fenwal</td><td>R4R-7004</td><td></td></tr><tr><td>Human platelets</td><td>Sanquin</td><td></td><td>hospital surplus material expired for less than 2 d is used</td></tr><tr><td>platelet lysate</td><td></td><td></td><td>custom made</td></tr><tr><td>Disposable sterile bottles</td><td>Corning</td><td>09-761-11</td><td></td></tr><tr><td>500 mL PP centrifuge tubes</td><td>Corning</td><td>431123</td><td></td></tr><tr><td>a-MEM medium</td><td>Lonza</td><td>BE12-169F</td><td></td></tr><tr><td>glutamax</td><td>thermo fisher</td><td>35050038</td><td></td></tr><tr><td>pen/strep&amp;nbsp;</td><td>Invitrogen</td><td>15070063</td><td></td></tr><tr><td>transfusion system</td><td>Codan</td><td>455609</td><td></td></tr><tr><td>DMEM-F12</td><td>life technologies</td><td>11320-074</td><td></td></tr><tr><td>Normal Human Serum (NHS)</td><td>Sanquin</td><td></td><td></td></tr><tr><td>Hepes 1 M</td><td>Lonza</td><td>BE-17-737E</td><td></td></tr><tr><td>NaHCO&lt;sub&gt;3&lt;/sub&gt; 7.5%</td><td>Lonza</td><td>BE17-613E</td><td></td></tr><tr><td>CaCl&lt;sub&gt;2&lt;/sub&gt; 1 M</td><td>Sigma-Aldrich</td><td>10043-52-4</td><td></td></tr><tr><td>UW</td><td>Bridge to life</td><td>32911</td><td></td></tr><tr><td>Heparin</td><td>Leo Pharma</td><td></td><td></td></tr><tr><td>collagenase NB1 GMP grade</td><td>SERVA</td><td>17455.03</td><td></td></tr><tr><td>DMSO</td><td>Sigma Aldrich</td><td>D2650-100ml</td><td></td></tr><tr><td>surgical drapes</td><td>3M Nederland</td><td>DH999969404</td><td></td></tr><tr><td>perfusion pump</td><td>metrohm</td><td>x007528300</td><td></td></tr><tr><td>pump head</td><td>metrohm</td><td>x077202600</td><td></td></tr><tr><td>perfusion tray</td><td></td><td></td><td>custom made</td></tr><tr><td>LS25 masterflex tubes</td><td>Masterflex</td><td>HV-96410-25</td><td></td></tr><tr><td>accessory spike</td><td>Gambro DASCO</td><td>6038020</td><td></td></tr><tr><td>pulmozyme</td><td>Roche</td><td></td><td></td></tr><tr><td>culture flasks 25 cm&lt;sup&gt;2&lt;/sup&gt;</td><td>greiner</td><td>690175</td><td></td></tr><tr><td>culture flask 75 cm&lt;sup&gt;2&lt;/sup&gt;</td><td>greiner</td><td>658170</td><td></td></tr><tr><td>culture flask 175 cm&lt;sup&gt;2&lt;/sup&gt;</td><td>greiner</td><td>661160</td><td></td></tr><tr><td>Trypsin</td><td>sigma</td><td>t4174</td><td></td></tr><tr><td>Bovine Serum Albumin (BSA)</td><td>Sigma</td><td>A2153</td><td></td></tr><tr><td>EDTA</td><td>Sigma-Aldrich</td><td>E5134-500g</td><td></td></tr><tr><td>FcR blocking reagent</td><td>miltenyi</td><td>130-059-901</td><td></td></tr><tr><td>anti melanoma beads (NG2)</td><td>miltenyi</td><td>130-090-452</td><td></td></tr><tr><td>cell strainer 70 &amp;micro;m</td><td>Corning</td><td>352350</td><td></td></tr><tr><td>LS columns</td><td>Miltenyi</td><td>130-042-401</td><td></td></tr><tr><td>MACS magnet</td><td>miltenyi</td><td>130-090-976</td><td></td></tr><tr><td>CD34 FITC</td><td>BD&amp;nbsp;</td><td>555821</td><td></td></tr><tr><td>CD45 APC</td><td>BD&amp;nbsp;</td><td>555485</td><td></td></tr><tr><td>CD146 PE</td><td>BD&amp;nbsp;</td><td>550315</td><td></td></tr><tr><td>NG2 APC</td><td>R&amp;amp;D</td><td>FAB2585A</td><td></td></tr><tr><td>CD90 PE</td><td>BD&amp;nbsp;</td><td>555596</td><td></td></tr><tr><td>HLA ABC APC</td><td>BD&amp;nbsp;</td><td>555555</td><td></td></tr><tr><td>CD105 FITC</td><td>Ancell</td><td>326-040</td><td></td></tr><tr><td>HLA DR APC</td><td>BD&amp;nbsp;</td><td>559866</td><td></td></tr><tr><td>CD56 PE</td><td>BD&amp;nbsp;</td><td>555516</td><td></td></tr><tr><td>CD73 PE</td><td>BD&amp;nbsp;</td><td>550257</td><td></td></tr><tr><td>CD31 FITC</td><td>BD&amp;nbsp;</td><td>555445</td><td></td></tr><tr><td>CD133 PE</td><td>miltenyi</td><td>130-090-853</td><td></td></tr><tr><td>PDGF-r&amp;nbsp;</td><td>R&amp;amp;D</td><td>mab 1263</td><td></td></tr><tr><td>mouse IgG1 FITC</td><td>BD&amp;nbsp;</td><td>345815</td><td></td></tr><tr><td>mouse IgG1 PE</td><td>BD&amp;nbsp;</td><td>345816</td><td></td></tr><tr><td>mouse IgG1 APC</td><td>BD&amp;nbsp;</td><td>345818</td><td></td></tr><tr><td>IgG2b PE</td><td>BD&amp;nbsp;</td><td>555743</td><td></td></tr><tr><td>goat anti mouse PE</td><td>Dako</td><td>R0480</td><td></td></tr><tr><td>sodium azide</td><td>Merck</td><td>822335</td><td></td></tr><tr><td>DMEM Ham&amp;rsquo;s F12</td><td>Gibco</td><td>31331-028</td><td></td></tr><tr><td>ITS (insulin, transferrin, selenium)</td><td>Sigma</td><td>I1884</td><td></td></tr><tr><td>hydrocortisone</td><td>Sigma</td><td>H0135</td><td></td></tr><tr><td>triiodothyrinine</td><td>Sigma</td><td>T5516</td><td></td></tr><tr><td>Epidermal Growth Factor (EGF)</td><td>sigma</td><td>E9644</td><td></td></tr><tr><td>Immortalized human renal PTEC (HK2)</td><td></td><td></td><td>courtesey of M. Ryan, university college Dublin</td></tr></tbody></table>

a novel clinical grade isolation method for human kidney perivascular stromal cells

Mezenkimal Stromal hücreler (MSCs) yararlı etkileri böbrek hastalıkları ve nakli göstermiştir doku homeostatik ve bağışıklık düzenleyici hücrelerdir. Perivasküler Stromal hücreler (PSC) kemik iliği MSCs (bmMSCs) ile ortak özelliklere sahiptir. Ancak, onlar da, büyük olasılıkla yerel sürecinden, doku özgü özellikleri ve yerel doku homeostazı bir rol oynar nedeniyle sahip. Bu doku özgüllük doku belirli tamir, insan böbreğe içinde de neden olabilir. Biz daha önce insan böbrek PSC'ler (kPSCs) bmMSCs bu potansiyelin yoktu Oysa şifa böbrek epitel yara gelişmiş gösterdi. Ayrıca, kPSCs böbrek yaralanma içinde vivoiyileştirmek. Bu nedenle, kPSCs hücre tedavisi, özellikle böbrek hastalıkları ve böbrek nakli için ilginç bir kaynak oluşturmaktadır. İşte bütün organ perfüzyon renal arter ve zenginleştirme Perivasküler işaretçi NG2 için üzerinden sindirim enzimleri, temel insan böbrek nakli-sınıftan kPSCs için detaylı yalıtım ve kültür yöntemi göstermektedir. Bu şekilde, büyük hücreli miktarları hücresel tedavi için uygun elde edilebilir.

Klinik sınıf kPSCs yalıtım yöntemini şekil 1' de özetlenmiştir. Ham böbrek hücreleri insan nakli sınıf böbrekler collagenase perfüzyon tarafından izole edilmiştir. Elde edilen hücre süspansiyon %5 trombosit lysates birleşmesi kadar kültürlü. O zaman Perivasküler stromal hücre kesir NG2 ifadeye dayalı izole edilmiştir.
kPSCs plastik yapisan seklinde hücreler (Şekil 2A) ve negatif CD31, CD34, CD45 ve HLA-DR (Şekil 2B) için ise CD73, CD90, CD105 ve Perivasküler stromal işaretleri işaretleri NG2, PDGFR-B ve CD146, olumludur. Genellikle, kPSCs homojen bir nüfusa geçiş 4 ulaşılabilir ve kPSCs yaşlanma etrafında geçit 9-10 (Şekil 2C) ulaşır. Bu yüzden deneyler geçit 5-8 arasında gerçekleştirmek için tavsiye ederiz.
Biz daha önce kPSCs şartına orta bu karalama tahlil15dakika içinde epitel yara iyileşmesi hızlandırabilir gösterdiğim gibi izole kPSCs fonksiyonel kapasitesini değerlendirmek için bir vitro böbrek epitel yara karalama tahlil kPSCs, her yeni toplu gerçekleştiriyoruz. KPSC şartına orta kPSCs alphaMEM % 5 trombosit lysates 48 h için kültür ve süpernatant toplama yapılır. Ardından, ölümsüzleştirdi insan böbrek proksimal tübül epitel hücreleri (HK-2)17 birleşmesi kadar kültürlü ve sıfırdan bir yara daha sonra yapılır. O zaman ya kPSCs veya denetim orta şartına orta wells için eklenir ve yara iyileşme hızı ölçülür. KPSCs klimalı ortam eklendiğinde, yara önemli ölçüde daha hızlı (Şekil 2D) kapatır.
<img alt="Figure 1" class="xfigimg" src="/files/ftp_upload/55841/55841fig1.jpg"> 
Resim 1 : Klinik sınıf izolasyon yöntemi, insan kPSCs. Organ nakli sınıf böbrek cannulated ve collagenase yolu ile renal arter (A - G) ile derin ve elde edilen hücre süspansiyon yıkanmış ve ya cryopreserved ya da kültür (H - K) koymak. Hücreleri confluency (L) ulaştıktan sonra hücre zenginleştirme olduğunu NG2 (M) gerçekleştirilen. Hücrelerin trypsinized ne zaman onlar are ikisinden biri Konfluent, Proliferasyona veya 3D yapılar (N - P) görüntülenirken durduruldu. KPSCs sürüm ölçütlerini kısırlık, işaretleyici ifade ve (Q) borulu epitel yara iyileşmesi geliştirmek için yeteneği vardır. Oku: renal arter. Ölçek çubuğu 200 µm. = <a href="http://ecsource.jove.com/files/ftp_upload/55841/55841fig1large.jpg" target="_blank">Bu rakam daha büyük bir versiyonunu görüntülemek için buraya tıklayınız.</a>
<img alt="Figure 2" class="xfigimg" src="/files/ftp_upload/55841/55841fig2.jpg"> 
Resim 2: karakterizasyonu insan kPSCs. Bir) kPSCs seklinde, plastik yapışık hücreleri vardır. B) kPSCs Mezenkimal işaretleri CD73, CD90, CD105, Perivasküler işaretleri NG2, PDGFR-β ve CD146, negatif CD31, CD34 ve CD45 için süre için olumludur. kPSCs express MHC sınıf ı (HLA-ABC) ama değil sınıf II (HLA-DR). C) Akış Sitometresi üç farklı kPSC bağışçılardan büyüme özellikleri (Bölüm 4), homojen NG2 olumlu nüfus doğruladı. kPSCs yaşlanma etrafında geçit 9-10 ulaşmak. D) kPSCs böbrek epitel onarım bir yara karalama tahlil geliştirmek edebiliyoruz. Temsilcisi görüntüleri kontrol orta ve şartına kPSC orta t = 0, 4, 8 ve 12 h gösterilir. A ölçek çubuğu) = d 200 µm) 100 µm. = <a href="http://ecsource.jove.com/files/ftp_upload/55841/55841fig2large.jpg" target="_blank">Bu rakam daha büyük bir versiyonunu görüntülemek için buraya tıklayınız.</a>

Watch this Scientific Journal Video about A Novel Clinical Grade Isolation Method for Human Kidney Perivascular Stromal Cells at JoVE.com

A Novel Clinical Grade Isolation Method for Human Kidney Perivascular Stromal Cells

Burada böbrek Perivasküler Stromal bütün organ perfüzyon sindirim enzimleri ve NG2 hücreli zenginleştirme dayalı hücreleri (kPSCs) için bir roman klinik sınıf izolasyon ve kültür yöntem mevcut. Bu yöntemle, hücresel tedavi için yeterli hücre sayıları elde etmek mümkündür.

İnsan böbrek Perivasküler Stromal hücreler için bir roman klinik sınıf izolasyon yöntemi

Mesenchymal Stromal Cells (MSCs) are tissue homeostatic and immune modulatory cells that have shown beneficial effects in kidney diseases and ...

a-novel-clinical-grade-isolation-method-for-human-kidney-perivascular

Research

JoVE Journal

Medicine

6.8K Görüntüleme.  Leiden University Medical Centre. Burada böbrek Perivasküler Stromal bütün organ perfüzyon sindirim enzimleri ve NG2 hücreli zenginleştirme dayalı hücreleri (kPSCs) için bir roman klinik sınıf izolasyon ve kültür yöntem mevcut. Bu yöntemle, hücresel tedavi için yeterli hücre sayıları elde etmek mümkündür.

Video: A Novel Clinical Grade Isolation Method for Human Kidney Perivascular Stromal Cells

Isolation of Glomeruli and In Vivo Labeling of Glomerular Cell Surface Proteins

Proteinuria results from the disruption of the glomerular filter that is composed of the fenestrated endothelium, glomerular basement membrane, and podocytes with their slit diaphragms. The delicate structure of the glomerular filter, especially the slit diaphragm, relies on the interplay of diverse cell surface proteins. Studying these cell surface proteins has so far been limited to in vitro studies or histologic analysis. Here, we present a murine in vivo biotinylation labeling method, which enables the study of glomerular cell surface proteins under physiologic and pathophysiologic conditions. This protocol contains information on how to perfuse mouse kidneys, isolate glomeruli, and perform endogenous immunoprecipitation of a protein of interest. Semi-quantitation of glomerular cell surface abundance is readily available with this novel method, and all proteins accessible to biotin perfusion and immunoprecipitation can be studied. In addition, isolation of glomeruli with or without biotinylation enables further analysis of glomerular RNA and protein as well as primary glomerular cell culture (i.e., primary podocyte cell culture).

Isolation of Glomeruli and In Vivo Labeling of Glomerular Cell Surface Proteins

Here we present a protocol for murine in vivo labeling of glomerular cell surface proteins with biotin. This protocol contains information on how to perfuse mouse kidneys, isolate glomeruli, and perform endogenous immunoprecipitation of the protein of interest.

Yalıtım Glomeruli ve Glomerular hücre yüzey proteinleri Vivo etiketleme

Proteinuria results from the disruption of the glomerular filter that is composed of the fenestrated endothelium, glomerular basement membrane, and ...

Biyokimya

Isolation of Double Negative &#945;&#946; T Cells from the Kidney

There is currently no standard protocol for the isolation of DN T cells from the non-lymphoid tissues despite their increasingly reported involvement in various immune responses. DN T cells are a unique immune cell type that has been implicated in regulating immune and autoimmune responses and tolerance to allotransplants1-6. DN T cells are, however, rare in peripheral blood and secondary lymphoid organs (spleen and lymph nodes), but are major residents of the normal kidney. Very little is known about their pathophysiologic function7 due to their paucity in the periphery. We recently described a comprehensive phenotypic and functional analysis of this population in the kidney8 in steady state and during ischemia reperfusion injury. Analysis of DN T cell function will be greatly enhanced by developing a protocol for their isolation from the kidney.
Here, we describe a novel protocol that allows isolation of highly pure ab CD4+ CD8+ T cells and DN T cells from the murine kidney. Briefly, we digest kidney tissue using collagenase and isolate kidney mononuclear cells (KMNC) by density gradient. This is followed by two steps to enrich hematopoietic T cells from 3% to 70% from KMNC. The first step consists of a positive selection of hematopoietic cells using a CD45+ isolation kit. In the second step, DN T cells are negatively isolated by removal of non-desired cells using CD4, CD8, and MHC class II monoclonal antibodies and CD1d &#945;-galcer tetramer. This strategy leads to a population of more than 90% pure DN T cells. Surface staining with the above mentioned antibodies followed by FACs analysis is used to confirm purity.

DNabT cells are rare among peripheral T cells; however, they are abundant in certain non-lymphoid tissues. Difficulty of isolating DN T cells from non-lymphoid tissue hinders their functional analysis despite increasing recognized pathophysiologic significance. We describe a novel protocol for isolation of highly purified DN T cells from murine kidney.

Böbrek gelen Çift Negatif αβ T Hücreleri İzolasyon

There is currently no standard protocol for the isolation of DN T cells from the non-lymphoid tissues despite their increasingly reported involvement in ...

İmmünoloji ve Enfeksiyon

Reliable and High Efficiency Extraction of Kidney Immune Cells

Immune system activation occurs in multiple kidney diseases and pathophysiological processes. The immune system consists of both adaptive and innate components and multiple cell types. Sometimes, the cell type of interest is present in very low numbers among the large numbers of total cells isolated from the kidney. Hence, reliable and efficient isolation of kidney mononuclear cell populations is important in order to study the immunological problems associated with kidney diseases. Traditionally, tissue isolation of kidney mononuclear cells have been performed via enzymatic digestions using different varieties and strengths of collagenases/DNAses yielding varying numbers of viable immune cells. Recently, with the development of the mechanical tissue disruptors for single cell isolation, the collagenase digestion step is avoided and replaced by a simple mechanical disruption of the kidneys after extraction from the mouse. Herein, we demonstrate a simple yet efficient method for the isolation of kidney mononuclear cells for every day immune cell extractions. We further demonstrate an example of subset analysis of immune cells in the kidney. Importantly, this technique can be adapted to other soft and non-fibrous tissues such as the liver and brain.

Techniques that are reliable and efficient for the isolation of kidney immune cells are needed for downstream applications. This requires surface antibody labeling of a small number of kidney immune cells. Herein, we describe a concise method for isolation of kidney immune cells that seemingly achieves this goal.

Böbrek Bağışıklık Hücreleri Güvenilir ve Yüksek Verimlilik Ekstraksiyon

Immune system activation occurs in multiple kidney diseases and pathophysiological processes.  The immune system consists of both adaptive and innate ...

An Efficient Sieving Method to Isolate Intact Glomeruli from Adult Rat Kidney

Preservation of glomerular structure and function is pivotal in the prevention of glomerulonephritis, a category of kidney disease characterized by proteinuria which can eventually lead to chronic and end-stage renal disease. The glomerulus is a complex apparatus responsible for the filtration of plasma from the body. In disease, structural integrity is lost and allows for the abnormal leakage of plasma contents into the urine. A method to isolate and examine glomeruli in culture is critical for the study of these diseases. In this protocol, an efficient method of retrieving intact glomeruli from adult rat kidneys while conserving structural and morphological characteristics is described. This process is capable of generating high yields of glomeruli per kidney with minimal contamination from other nephron segments. With these glomeruli, injury conditions can be mimicked by incubating them with a variety of chemical toxins, including protamine sulfate, which causes foot process effacement and proteinuria in animal models. Degree of injury can be assessed using transmission electron microscopy, immunofluorescence staining, and western blotting. Nephrin and Wilms Tumor 1 (WT1) levels can also be assessed from these cultures. Due to the ease and flexibility of this protocol, the isolated glomeruli can be utilized as described or in a way that best suits the needs of the researcher to help better study glomerular health and structure in diseased states.

The main focus of this protocol is to efficiently isolate viable primary glomeruli cultures with minimal contaminants for use in a variety of downstream applications. The isolated glomeruli retain structural relationships between component cell types and can be cultured ex vivo for a short time.

Yetişkin sıçan böbrek üzerinden olduğu gibi Glomeruli yalıtmak için verimli bir eleme yöntemi

Preservation of glomerular structure and function is pivotal in the prevention of glomerulonephritis, a category of kidney disease characterized by ...

Tıp

Single-channel Analysis and Calcium Imaging in the Podocytes of the Freshly Isolated Glomeruli

Podocytes (renal glomerular epithelial cells) are known to regulate glomerular permeability and maintain glomerular structure; a key role for these cells in the pathogenesis of various renal diseases has been established since podocyte injury leads to proteinuria and foot process effacement. It was previously reported that various endogenous agents may cause a dramatic overload in intracellular Ca2+ concentration in podocytes, presumably leading to albuminuria, and this likely occurs via calcium-conducting ion channels. Therefore, it appeared important to study calcium handling in the podocytes both under normal conditions and in various pathological states. However, available experimental approaches have remained somewhat limited to cultured and transfected cells. Although they represent a good basic model for such studies, they are essentially extracted from the native environment of the glomerulus. Here we describe the methodology of studying podocytes as a part of the freshly isolated whole glomerulus. This preparation retains the functional potential of the podocytes, which are still attached to the capillaries; therefore, podocytes remain in the environment that conserves the major parts of the glomeruli filtration apparatus. The present manuscript elaborates on two experimental approaches that allow 1) real-time detection of calcium concentration changes with the help of ratiometric confocal fluorescence microscopy, and 2) the recording of the single ion channels activity in the podocytes of the freshly isolated glomeruli. These methodologies utilize the advantages of the native environment of the glomerulus that enable researchers to resolve acute changes in the intracellular calcium handling in response to applications of various agents, measure basal concentration of calcium within the cells (for instance, to evaluate disease progression), and assess and manipulate calcium conductance at the level of single ion channels.

Changes in the intracellular calcium levels in the podocytes are one of the most important means to control the filtration function of glomeruli. Here we explain a high-throughput approach that allows detection of real-time calcium handling and single ion channels activity in the podocytes of the freshly isolated glomeruli.

Taze İzole glomerulusların Podositler Tek kanallı Analizi ve Kalsiyum Görüntüleme

Podocytes (renal glomerular epithelial cells) are known to regulate glomerular permeability and maintain glomerular structure; a key role for these cells ...

Biyoloji

Isolation, Characterization, And High Throughput Extracellular Flux Analysis of Mouse Primary Renal Tubular Epithelial Cells

Mitochondrial dysfunction in the renal tubular epithelial cells (TECs) can lead to renal fibrosis, a major cause of&#160;chronic kidney disease (CKD). Therefore, assessing mitochondrial function in primary TECs may provide valuable insight into the bioenergetic status of the cells, providing insight into the pathophysiology of CKD. While there are a number of complex protocols available for the isolation and purification of proximal tubules in different species, the field lacks a cost-effective method optimized for&#160;tubular cell isolation without the need for purification. Here, we provide an isolation protocol that allows for studies focusing on both primary mouse proximal and distal renal TECs. In addition to cost-effective reagents and minimal animal procedures required in this protocol, the isolated cells maintain high energy levels after isolation and can be sub-cultured up to four&#160;passages, allowing for continuous studies. Furthermore, using a high throughput extracellular flux analyzer, we assess the mitochondrial respiration directly in the isolated TECs in a 96-well plate for which we provide recommendations for the optimization of cell density and compound concentration. These observations suggest that this protocol can be used for renal tubular ex vivo studies with a consistent, well-standardized production of renal TECs. This protocol may have broader future applications to study mitochondrial dysfunction associated with renal disorders for drug discovery or drug characterization purposes.

This protocol provides a cost-effective approach to isolate and characterize mouse primary renal tubular cells that can subsequently be sub-cultured to assess renal biological functions ex vivo, including mitochondrial bioenergetics.

Yalıtım, karakterizasyonu ve yüksek işlem hacmi ekstraselüler akı analiz fare birincil Renal tübüler epitel hücresi

Mitochondrial dysfunction in the renal tubular epithelial cells (TECs) can lead to renal fibrosis, a major cause of&#160;chronic kidney disease (CKD). ...

Isolation of Conditionally Immortalized Mouse Glomerular Endothelial Cells with Fluorescent Mitochondria

Glomerular endothelial cell (GEC) dysfunction can initiate and contribute to glomerular filtration barrier breakdown. Increased mitochondrial oxidative stress has been suggested as a mechanism resulting in GEC dysfunction in the pathogenesis of some glomerular diseases. Historically the isolation of GECs from in vivo models has been notoriously challenging due to difficulties in isolating pure cultures from glomeruli. GECs have complex growth requirements in vitro and a very limited lifespan. Here, we describe the procedure for isolating and culturing conditionally immortalized GECs with fluorescent mitochondria, enabling the tracking of mitochondrial fission and fusion events. GECs were isolated from the kidneys of a double transgenic mouse expressing the thermolabile SV40 TAg (from the Immortomouse), conditionally promoting proliferation and suppressing cell differentiation, and a photo-convertible fluorescent protein (Dendra2) in all mitochondria (from the photo-activatable mitochondria [PhAMexcised] mouse). The stable cell line generated allows for cell differentiation after inactivation of the immortalizing SV40 TAg gene and photo-activation of a subset of mitochondria causing a switch in fluorescence from green to red. The use of mitoDendra2-GECs allows for live imaging of fluorescent mitochondria&#39;s distribution, fusion, and fission events without staining the cells.

The article describes the method for isolating conditionally immortalized glomerular endothelial cells from the kidneys of transgenic mice expressing the thermolabile simian virus 40 and photo-activatable mitochondria, PhAMexcised. We describe the procedure for glomeruli isolation from whole kidneys using beads, digestion steps, seeding, and culturing of GECs-CD31 positive.

Şartlı Ölümsüzleştirilmiş Fare Glomerüler Endotel Hücrelerinin Floresan Mitokondri ile İzolasyonu

Glomerular endothelial cell (GEC) dysfunction can initiate and contribute to glomerular filtration barrier breakdown. Increased mitochondrial oxidative ...

Isolation of Primary Human Proximal Tubule Epithelial Cells and Their Use in Creating a Microphysiological Model of the Renal Proximal Tubule

Kidney disease affects over 850 million people globally, including 37 million Americans. Risk factors for&#160;chronic kidney disease include environmental influences, genetic predispositions, co-existing medical conditions, and a history of acute kidney injury. These factors often take months or years to develop, complicating longitudinal studies of disease etiology and pathophysiology. Advanced kidney models are needed to improve our understanding of disease mechanisms and enhance nephrotoxicity prediction in drug development. Proximal tubule epithelial cells (PTECs) in the kidney play a critical role in xenobiotic and toxin clearance as well as the reabsorption of essential nutrients. We have previously demonstrated that three-dimensional (3D) microphysiological system (MPS) platforms, populated with isolated primary PTECs, can be used to investigate renal drug interactions, assess nephrotoxicity of compounds, and predict drug clearance. Here, we present protocols for isolating and culturing primary PTECs from whole human kidneys and for seeding them into a 3D MPS platform that mimics in vivo renal physiology. This protocol enables long-term studies supporting PTEC viability, physiological morphology, and functional polarization of key transporter proteins in MPS devices for up to 6 months.

We present an optimized protocol for processing whole human kidneys to isolate and culture primary renal proximal tubule epithelial cells and the application of these cells in a three-dimensional, microfluidic, microphysiological platform to recapitulate the renal proximal tubule.

Primer İnsan Proksimal Tübül Epitel Hücrelerinin İzolasyonu ve Renal Proksimal Tübülün Mikrofizyolojik Modelinin Oluşturulmasında Kullanımı

Kidney disease affects over 850 million people globally, including 37 million Americans. Risk factors for&#160;chronic kidney disease include ...

Optimizing Isolation and Purification of Murine Glomerular Mesangial Cells

Mesangial cells (MCs) are stromal cells located in the middle space of the glomerulus, with pivotal functions in glomerular homeostasis. Methods for isolating, purifying, and culturing glomerular MCs have been developed and optimized since the 1980s for use in biomedical research, particularly in the field of nephrology. Mice are the most frequently used experimental animal models in research on renal diseases. In this study, we developed an optimized protocol for murine MCs isolation and ex vivo cell culture. These cells can be passaged multiple times, frozen, revived, and cultured without compromising cell growth or protein expression. This optimized approach significantly reduces the study duration for researchers and enables long-term cell preservation. The necessary equipment for the procedures is easily accessible in a basic biomedical laboratory, and the procedural steps are straightforward. The acquisition of target cells requires only 2-3 weeks, a reduction of at least 1 week compared to existing methods.

This study developed an optimized protocol for the isolation of murine mesangial cells (MCs) and their ex vivo cell culture. These cells can be passaged multiple times, frozen, revived, and cultured without compromising cell growth or protein expression.

Murin Glomerüler Mezanjiyal Hücrelerin İzolasyonunu ve Saflaştırılmasını Optimize Etmek

Mesangial cells (MCs) are stromal cells located in the middle space of the glomerulus, with pivotal functions in glomerular homeostasis. Methods for ...

Murine Renal Cell Isolation: A Technique to Isolate and Generate Primary Culture of Renal Tubular Epithelial Cells

Source: Ding, W. et al. <a href="https://www.jove.com/video/57718" target="_blank">Isolation, Characterization and High Throughput Extracellular Flux Analysis of Mouse Primary Renal Tubular Epithelial Cells.</a> J. Vis. Exp. (2018)
In this video, we demonstrate the steps to isolate and purify renal tubular epithelial cells for a wide range of molecular biology and cell culture studies.

Murin Renal Hücre İzolasyonu: Renal Tübüler Epitel Hücrelerinin Primer Kültürünü İzole Etmek ve Oluşturmak İçin Bir Teknik

Source: Ding, W. et al. Isolation, Characterization and High Throughput Extracellular Flux Analysis of Mouse Primary Renal Tubular Epithelial Cells. J. ...