시카고 일리노이 대학에서 창립뿐만 아니라 지원 아일릿 세포 자원 센터 NIH 그랜트 (RFA - RR 05-003), 크리스토퍼 재단 Efroymson 재단과 Tellabs 재단으로.

1. 아일 레츠의 정제 <ol><li> 아일릿 정화 절차를 시작하려면, COBE 가방을 읽어 녹색 튜브를 제외한 모든 튜브 클램프, 0로 1,500 속도를 설정하고 슈퍼. </li><li> 후드에는 펌프와 그라디언트 비커를 설정하고 녹색 튜브에 수집 튜브를 연결합니다. </li><li> &quot;회전&quot;은 다음 앞에 비커에 Ficoll 1.100 110 ML을 추가 푸시하고, COBE 가방을로드하기 위해 펌프를 시작 이제 ficoll 1.100의 로딩이 시작할 수 있습니다. Ficoll이로드되면서, 슈퍼를 눌러 펌프를 정지, 펌프​​ 헤드를 unclamp 100에 슈퍼 제한 속도를 설정합니다. </li><li> ficoll이 비커에 도달하고 모든 공기가 펌프 헤드에서 튜브, 다시 클램프에서 퇴학 경우. 3000 회전 속도, 그리고 슈퍼 아웃 속도 0으로 설정합니다. </li><li> 지금은 전면 비커에 무거운 그라디언트를 따르고하여 그라디언트를 로드할 준비합니다. 약간 모든 공기를 제거하는 두 비커 사이의 클램프를 놓습니다. 그런 다음 다시 비커에 빛을 그라데이션을 따라줘. </li><li> 자기 활동가 켜고, COBE 기계에 &quot;스핀&quot;을 누르 두 비커를 연결하는 튜브의 클램프를 제거하고, 시각적으로 무겁고 가벼운 그라디언트가 혼합되어 있는지 확인합니다. </li><li> 그라디언트가 혼합 시작되면, 원심 분리기를 켜십시오. 잠시만 기다려 다음 혼합 그라디언트를 로드할 수있는 펌프를 켭니다. </li><li> 조직의 그라데이션이 앞에 비커에 부족하게 로드할 수 있지만, 공기가 로딩 튜브를 입력하도록 낮아 다음 비커를 연결하는 튜브를 reclamp하고 조직을로드하지 않습니다. </li><li> 조직의 나머지 부분을 계속 추가합니다. 그런 다음 세척 솔루션 50 ML과 조직을 개최 튜브를 세척하고, 전면 비커를 씻어을 사용합니다. </li><li> 조직의 마지막 봉투를 입력으로 동시에를 펌프를 정지 펌프 헤드에 unclamp하고, 가방 위 튜빙을 클램프. 5 분 원심 분리기로 진행합니다. </li><li> 원심 분리가 계속하는 동안, 후드에 12 컬렉션 튜브를 가지고와 그 뚜껑을 느슨하게. 노란색 튜브에 수집 튜브를 부착하고, 원뿔 튜브 하나에 멸균 수집 팁 장소. 다음 노란색 튜브를 unclamp하고, 녹색 튜브 클램프. </li><li> 회전이 끝나면 천천히 100 Superout을 올립니다. 튜브 1 150 ML를 수집합니다. 다음 (200-230 ML에서) 튜브 2-12에서 30 ML를 수집합니다. </li><li> 일단 수집이 완료되면, COBE의 &quot;STOP&quot;푸시. 이제 정화는 이제 끝났어 아일 ​​레츠는 평가와 교양 수 있습니다. </li></ol> 2. 샘플링과 문화 <ol><li> 정화 아일 레츠 분수를 수집 후, 12 컬렉션 튜브의 각 샘플을 제거하고 Dithizone로 얼룩. 얼룩은 레이어 낮은 순도 아일 레츠와 고순도 아일 레츠 대 레이어를 포함하는 표시됩니다. </li><li> 각 함께 높고 낮은 순도 조직과 수영장를 수집합니다. </li><li> 스핀과 두 번 씻으십시오. 두 번째 세척 후, 최종 와시 매체와 250 ML 각의 볼륨을 가져. </li><li> 평가하려면 풀링 분수가 낮은에서 풀링된 분수 하나 하나 ML 샘플의 높은 두 한 ML 샘플을 채취하여 시작합니다. 세척 용액 9 ML을 포함하는 원뿔 관에 각각 1ml 샘플을 전송합니다. </li><li> 다음 각 15 ML 관에서 계산 접시 1 ML을 전송하기만하면됩니다. 검사하고 현미경으로 세포를 계산합니다. </li><li> (십진수로 아일 레츠 총 EIN / 순수) / (술병 당 30,000 EIN) : 세포가 문화를 다음 수식을 사용하여 아일 레츠를 필요 flasks의 수를 계산 카운트 후. 예를 들어, 90 % 순도로 100,000 아일 레츠 4 flasks에서 양식입니다. </li><li> 37 T175 flasks 문화에 아일 레츠를 전송 ˚ C 및 5% CO 2 배양기. </li></ol>

<ol>
	<li>Shapiro, A. M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Islet+transplantation+in+seven+patients+with+type+1+diabetes+mellitus+using+a+glucocorticoid-free+immunosuppressive+regimen.">Islet transplantation in seven patients with type 1 diabetes mellitus using a glucocorticoid-free immunosuppressive regimen.</a> N Engl J Med. 343, 230-238 (2000).</li><li>Nano, R. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Islet+isolation+for+allotransplantation:+variables+associated+with+successful+islet+yield+and+graft+function.">Islet isolation for allotransplantation: variables associated with successful islet yield and graft function.</a> Diabetologia. 48, 906-912 (2005).</li><li>Barbaro, B. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Improved+human+pancreatic+islet+purification+with+the+refined+UIC-UB+density+gradient.">Improved human pancreatic islet purification with the refined UIC-UB density gradient.</a> Transplantation. 84, 1200-1203 (2007).</li><li>Lakey, J. R., Rajotte, R. V., Warnock, G. L., Kneteman, N. M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Human+pancreas+preservation+prior+to+islet+isolation.+Cold+ischemic+tolerance.">Human pancreas preservation prior to islet isolation. Cold ischemic tolerance.</a> Transplantation. 59, 689-694 (1995).</li><li>Fridell, J. A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Comparison+of+histidine-tryptophan-ketoglutarate+solution+and+University+of+Wisconsin+solution+for+organ+preservation+in+clinical+pancreas+transplantation.">Comparison of histidine-tryptophan-ketoglutarate solution and University of Wisconsin solution for organ preservation in clinical pancreas transplantation.</a> Transplantation. 77, 1304-1306 (2004).</li><li>Potdar, S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Initial+experience+using+histidine-tryptophan-ketoglutarate+solution+in+clinical+pancreas+transplantation.">Initial experience using histidine-tryptophan-ketoglutarate solution in clinical pancreas transplantation.</a> Clin Transplant. 18, 661-665 (2004).</li><li>Salehi, P. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Human+islet+isolation+outcomes+from+pancreata+preserved+with+Histidine-Tryptophan+Ketoglutarate+versus+University+of+Wisconsin+solution.">Human islet isolation outcomes from pancreata preserved with Histidine-Tryptophan Ketoglutarate versus University of Wisconsin solution.</a> Transplantation. 82, 983-985 (2006).</li><li>Ricordi, C., Lacy, P. E., Scharp, D. W. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Automated+islet+isolation+from+human+pancreas.">Automated islet isolation from human pancreas.</a> Diabetes. 38 Suppl 1, 140-142 (1989).</li><li>Ricordi, C. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Islet+isolation+assessment+in+man+and+large+animals.">Islet isolation assessment in man and large animals.</a> Acta Diabetol Lat. 27, 185-195 (1990).</li></ol>

인간 아일릿 절연의 기술에 상당한 진보에도 불구하고, 아일릿 수율이 높은 변수 및 예측 남아 있습니다. 소화 췌장 조직의 정화는 이식을위한 성공적인 효소 소화 후 충분한 이슬 미사를 복구하는 데있어 매우 중요합니다. 매우 순수한 인간 아일 레츠의 뛰어난 복구이 방법을 사용하여 입증 되었기 때문에 UIC 정화 방법을 권장합니다. 또한, 소화 조직의 최대 50 ML 따라서 격리에 사용되는 총 시간...

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">	
		
		<div>
		<table border="1">
		<thead>
		<tr>
		<th>Material Name</th>
		<th>Type</th>
		<th>Company</th>
		<th>Catalogue Number</th>
		<th>Comment</th>
		</tr>
		</thead>
		<tbody>
		
<tr>
<td>Centrifuge</td>
<td>equipment</td>
<td>Beckman Coulter</td>
<td>424803</td>
<td>&nbsp;</td>
<tr>
<td>Cobe 2991 Cell Processor</td>
<td>equipment</td>
<td>Gambro. BCT</td>
<td>2556</td>
<td>islet purification</td>
</tr>
<tr>
<td>MZ6 Inverted Microscopy TLBD4.1</td>
<td>equipment</td>
<td>Leica Diagnostic Instrument Co</td>
<td>4103</td>
<td>&nbsp;</td>
<tr>
<td>Cell Culture Dish with 2 mm Grid</td>
<td>equipment</td>
<td>Nunc Brand Products</td>
<td>174926</td>
<td>islet counting</td>
</tr>
<tr>
<td>Digital Sight DS L1</td>
<td>equipment</td>
<td>Nikon</td>
<td>217267</td>
<td>&nbsp;</td>
<tr>
<td>COBE bag</td>
<td>disposable equipment</td>
<td>O.R. Solution</td>
<td>66707003</td>
<td>&nbsp;</td>
<tr>
<td>T175 culture flask</td>
<td>disposable equipment</td>
<td>Sarstedt</td>
<td>83.1812.500</td>
<td>&nbsp;</td>
<tr>
<td>University of Wisconcin (UW) solution</td>
<td>reagent</td>
<td>DURAMED</td>
<td>1000-46-06</td>
<td>&nbsp;</td>
<tr>
<td>Hank's Buffered Salt Solution (HBSS)</td>
<td>reagent</td>
<td>Mediatech Inc</td>
<td>99-597-CM</td>
<td>&nbsp;</td>
<tr>
<td>Ficoll 1.100</td>
<td>reagent</td>
<td>Bichrom AG</td>
<td>L6155</td>
<td>&nbsp;</td>
<tr>
<td>M199 media (wash solution)</td>
<td>reagent</td>
<td>Mediatech Inc</td>
<td>99-784-CM</td>
<td>&nbsp;</td>
<tr>
<td>Final wash/Culture Medium</td>
<td>reagent</td>
<td>Mediatech Inc</td>
<td>99-785-CV</td>
<td>&nbsp;</td>
<tr>
<td>Dithizone</td>
<td>reagent</td>
<td>Sigma </td>
<td>D5130</td>
<td>&nbsp;</td>		</tbody>
		</table>
		</div>

human pancreatic islet isolation: part ii: purification and culture of human islets

1 형 당뇨병의 관리는 매년 100여 억 달러를 비용, 모두 개인과 사회에, 부담합니다. 포도당 모니터링 및 새로운 인슐린 공법의 광범위한 사용에도 불구하고, 많은 사람은 여전히​​ 파괴적인 보조 합병증을 개발합니다. 췌장 아일릿 이식은 당뇨병 환자에서 정상적인 혈당 조절 근처에 복원할 수 있습니다<sup&gt; 1</sup&gt;, 집중적인 인슐린 요법과 관련된 심각한 혈당 에피소드의 위험이없이. 충분한 아일릿 질량을 제공하는 것은 성공적인 아일릿 이식을 위해 중요합니다. 그러나 기증자 특성, 기관 조달 및 보존은 절연 결과에 영향을<sup&gt; 2</sup&gt;. 시카고 일리노이 대학 (UIC)에서 우리는 개선 정화 기울기와 함께 성공적인 격리 프로토콜을 개발<sup&gt; 3</sup&gt;. 이 프로그램은 2004 년 1 월 시작했고 300 명 이상의 isolations 11 월 2008까지 수행했다. pancreata는 (UW, 위스콘신 또는 HTK 대학, 히스티딘 - 트립토판 Ketoglutarate) 차가운 보존 솔루션에 보내진<sup&gt; 4-7</sup&gt; 아일릿 절연을위한 UIC에서 셀 절연 연구실 있습니다. 췌장 아일 레츠는 원래 Ricordi에 기술된 방법의 수정된 버전입니다 UIC 방법을 사용하여 격리되었다<em&gt; 외</em&gt;<sup&gt; 8</sup&gt;. 로서 일부 설명 : 소화 및 췌장 조직의 수집, 인간의 췌장은 줄어들 cannulated, perfused, 그리고 소화했다. 수집 UW 솔루션에 부화 최소 30 분 후, 조직은 정화를위한 (COBE 2991, Cobe, 레이크 우드, CO) 세포 분리에로드했습니다<sup&gt; 3</sup&gt;. 다음 정화, 아일릿 수율 (아일릿 등가물, IEQ로 표현), 조직 볼륨, 그리고 순도가 표준 방식에 따라 결정되었습니다<sup&gt; 9</sup&gt;. 절연 아일 레츠는 CMRL -​​ 1066 1.5 % 인간의 알부민, 0.1 % 인슐린 트랜스페린 - 셀레늄 (ITS), * 시프 로플 록 사신, 1M HEPES 5 ML 1 ML과 보충 미디어 (Mediatech, 헤른던, VA), 그리고 14.5 ML에 교양되었습니다 37 T175 flasks에서 7.5 %의 나트륨 비카보네이트 ° C 야간 문화 아일 레츠가 이식이나 연구에 사용하기 전에.

Watch this Scientific Journal Video about Human Pancreatic Islet Isolation: Part II: Purification and Culture of Human Islets at JoVE.com

Human Pancreatic Islet Isolation: Part II: Purification and Culture of Human Islets

높은 품질과 인간 아일 레츠의 적절한 수량을 달성하는 것은 성공적인 아일릿 이식을 위해 유명 전제 조건 중 하나입니다. 이 비디오에서는, 우리는 단계별로 설명을 인간의 췌장 아일릿 절연 (부분 II : 인간 아일 레츠의 정화 및 문화)에 대한 절차를 수정 자동화된 방법을 사용하여.

인간 췌장 아일릿 절연 : 2 부 : 인간 아일 레츠의 정화와 문화

Management of Type 1 diabetes is burdensome, both to the individual and society, costing over 100 billion dollars annually. Despite the widespread use of ...

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15.4K 조회수.  University of Illinois, Chicago. 높은 품질과 인간 아일 레츠의 적절한 수량을 달성하는 것은 성공적인 아일릿 이식을 위해 유명 전제 조건 중 하나입니다. 이 비디오에서는, 우리는 단계별로 설명을 인간의 췌장 아일릿 절연 (부분 II : 인간 아일 레츠의 정화 및 문화)에 대한 절차를 수정 자동화된 방법을 사용하여.

비디오: Human Pancreatic Islet Isolation: Part II: Purification and Culture of Human Islets

Murine Pancreatic Islet Isolation

Murine 췌장 아일릿 격리

연구

생물학

Human Pancreatic Islet Isolation: Part I: Digestion and Collection of Pancreatic Tissue

Management of Type 1 diabetes is burdensome, both to the individual and society, costing over 100 billion dollars annually. Despite the widespread use of glucose monitoring and new insulin formulations, many individuals still develop devastating secondary complications. Pancreatic islet transplantation can restore near normal glucose control in diabetic patients 1, without the risk of serious hypoglycemic episodes that are associated with intensive insulin therapy. Providing sufficient islet mass is important for successful islet transplantation. However, donor characteristic, organ procurement and preservation affect the isolation outcome 2. At University of Illinois at Chicago (UIC) we have developed a successful isolation protocol with an improved purification gradient 3. The program started in January 2004, and more than 300 isolations were performed up to November 2008. The pancreata were sent in cold preservation solutions (UW, University of Wisconsin or HTK, Histidine-Tryptophan Ketoglutarate) 4-7 to the Cell Isolation Laboratory at UIC for islet isolation. Pancreatic islets were isolated using the UIC method, which is a modified version of the method originally described by Ricordi et al 8. Briefly, after cleaning the pancreas from the surrounding tissue, it was perfused with enzyme solution (Serva Collagenase + Neutral Protease or Sigma V enzyme). The distended pancreas was then transferred to the Ricordi digestion chamber, connected to a modified, closed circulation tubing system, and warmed up to 37&deg;C. During the digestion, the chamber was shaken gently. Samples were taken continuously to monitor the digestion progress. Once free islets were detected under the microscope, the digestion was stopped by flushing cold (4&deg;C) RPMI dilution solution (Mediatech, Herndon, VA) into the circulation system to dilute the enzyme. After being collected and washed in M199 media supplemented with human albumin, the tissue was sampled for pre-purification count and incubated with UW solution before purification. Purification process will be described in Part II: Purification and Culture of Human Islets.

Achieving high quality and appropriate quantity of human islets is one of the prominent prerequisites for successful islet transplantation. In this video, we describe step by step the procedures for human pancreatic islet isolation (part I: digestion and collection of pancreatic tissue) using a modified automated method.

인간 췌장 아일릿 격리 : 부품 I : 소화 및 췌장 조직의 수집

Isolation of Stem Cells from Human Pancreatic Cancer Xenografts

Cancer stem cells (CSCs) have been identified in a growing number of malignancies and are functionally defined by their ability to undergo self-renewal and produce differentiated progeny1. These properties allow CSCs to recapitulate the original tumor when injected into immunocompromised mice. CSCs within an epithelial malignancy were first described in breast cancer and found to display specific cell surface antigen expression (CD44+CD24low/-)2. Since then, CSCs have been identified in an increasing number of other human malignancies using CD44 and CD24 as well as a number of other surface antigens. Physiologic properties, including aldehyde dehydrogenase (ALDH) activity, have also been used to isolate CSCs from malignant tissues3-5.
Recently, we and others identified CSCs from pancreatic adenocarcinoma based on
ALDH activity and the expression of the cell surface antigens CD44 and CD24, and CD1336-8. These highly tumorigenic populations may or may not be overlapping and display other functions. We found that ALDH+ and CD44+CD24+ pancreatic CSCs are similarly tumorigenic, but ALDH+ cells are relatively more invasive8. In this protocol we describe a method to isolate viable pancreatic CSCs from low-passage human
xenografts9. Xenografted tumors are harvested from mice and made into a single-cell suspension. Tissue debris and dead cells are separated from live cells and then stained using antibodies against CD44 and CD24 and using the ALDEFLUOR reagent,
a fluorescent substrate of ALDH10. CSCs are then isolated by fluorescence activated cell sorting. Isolated CSCs can then be used for analytical or functional assays requiring viable cells.

Cancer stem cells (CSCs) have been identified in a number of malignancies. In this protocol we describe a flow cytometric method utilizing aldehyde dehydrogenase activity and CD44 and CD24 expression to isolate CSCs from human pancreatic adenocarcinoma xenografts. These viable cells can then be used in functional and analytical studies.

인간 췌장암의 Xenografts에서 줄기 세포의 분리

Cancer stem cells (CSCs) have been identified in a growing number of malignancies and are functionally defined by their ability to undergo self-renewal ...

Isolation and Culture of Adult Epithelial Stem Cells from Human Skin

The homeostasis of all self-renewing tissues is dependent on adult stem cells. As undifferentiated stem cells undergo asymmetric divisions, they generate daughter cells that retain the stem cell phenotype and transit-amplifying cells (TA cells) that migrate from the stem cell niche, undergo rapid proliferation and terminally differentiate to repopulate the tissue.
Epithelial stem cells have been identified in the epidermis, hair follicle, and intestine as cells with a high in vitro proliferative potential and as slow-cycling label-retaining cells in vivo 1-3. Adult, tissue-specific stem cells are responsible for the regeneration of the tissues in which they reside during normal physiologic turnover as well as during times of stress 4-5. Moreover, stem cells are generally considered to be multi-potent, possessing the capacity to give rise to multiple cell types within the tissue 6. For example, rodent hair follicle stem cells can generate epidermis, sebaceous glands, and hair follicles 7-9. We have shown that stem cells from the human hair follicle bulge region exhibit multi-potentiality 10.
Stem cells have become a valuable tool in biomedical research, due to their utility as an in vitro system for studying developmental biology, differentiation, tumorigenesis and for their possible therapeutic utility. It is likely that adult epithelial stem cells will be useful in the treatment of diseases such as ectodermal dysplasias, monilethrix, Netherton syndrome, Menkes disease, hereditary epidermolysis bullosa and alopecias 11-13. Additionally, other skin problems such as burn wounds, chronic wounds and ulcers will benefit from stem cell related therapies 14,15. Given the potential for reprogramming of adult cells into a pluripotent state (iPS cells)16,17, the readily accessible and expandable adult stem cells in human skin may provide a valuable source of cells for induction and downstream therapy for a wide range of disease including diabetes and Parkinson's disease.

A rapid, robust way of isolating viable adult epithelial stem cells from human skin is described. The method utilizes enzymatic digestion of skin collagen matrix , followed by plucking of hair follicles and isolation of single cell suspensions or tissue fragments for cell culture.

사람의 피부에서 성인 상피 줄기 세포의 분리 및 문화

The homeostasis of all self-renewing tissues is dependent on adult stem cells. As undifferentiated stem cells undergo asymmetric divisions, they generate ...

A Method for Mouse Pancreatic Islet Isolation and Intracellular cAMP Determination

Uncontrolled glycemia is a hallmark of diabetes mellitus and promotes morbidities like neuropathy, nephropathy, and retinopathy. With the increasing prevalence of diabetes, both immune-mediated type 1 and obesity-linked type 2, studies aimed at delineating diabetes pathophysiology and therapeutic mechanisms are of critical importance. The &#946;-cells of the pancreatic islets of Langerhans are responsible for appropriately secreting insulin in response to elevated blood glucose concentrations. In addition to glucose and other nutrients, the &#946;-cells are also stimulated by specific hormones, termed incretins, which are secreted from the gut in response to a meal and act on &#946;-cell receptors that increase the production of intracellular cyclic adenosine monophosphate (cAMP). Decreased &#946;-cell function, mass, and incretin responsiveness are well-understood to contribute to the pathophysiology of type 2 diabetes, and are also being increasingly linked with type 1 diabetes. The present mouse islet isolation and cAMP determination protocol can be a tool to help delineate mechanisms promoting disease progression and therapeutic interventions, particularly those that are mediated by the incretin receptors or related receptors that act through modulation of intracellular cAMP production. While only cAMP measurements will be described, the described islet isolation protocol creates a clean preparation that also allows for many other downstream applications, including glucose stimulated insulin secretion, [3H]-thymidine incorporation, protein abundance, and mRNA expression.

Assaying in vitro &#946;-cell function using isolated mouse islets of Langerhans is an important component in the study of diabetes pathophysiology and therapeutics. While many&#160;downstream applications are available, this protocol specifically describes the measurement of intracellular cyclic adenosine monophosphate (cAMP) as an essential parameter determining &#946;-cell function.

마우스 췌장 섬의 분리 및 세포 내 cAMP를 결정하는 방법

Uncontrolled glycemia is a hallmark of diabetes mellitus and promotes morbidities like neuropathy, nephropathy, and retinopathy. With the increasing ...

Isolation and Culture of Mouse Primary Pancreatic Acinar Cells

This protocol permits rapid isolation (in less than 1 hr) of murine pancreatic acini, making it possible to maintain them in culture for more than one week. More than 20 x 106 acinar cells can be obtained from a single murine pancreas. This protocol offers the possibility to independently process as many as 10 pancreases in parallel. Because it preserves acinar architecture, this model is well suited for studying the physiology of the exocrine pancreas in vitro in contrast to cell lines established from pancreatic tumors, which display many genetic alterations resulting in partial or total loss of their acinar differentiation.

In this publication, we describe a rapid and convenient procedure for isolating and culturing primary pancreatic acinar cells from the murine pancreas. This method constitutes a valuable approach to study the physiology of fresh primary normal/untransformed exocrine pancreatic cells.

마우스 기본 췌장 포상 세포의 분리 및 문화

This protocol permits rapid isolation (in less than 1 hr) of murine pancreatic acini, making it possible to maintain them in culture for more than one ...

Efficient Production and Purification of Recombinant Murine Kindlin-3 from Insect Cells for Biophysical Studies

Kindlins are essential coactivators, with talin, of the cell surface receptors&#160;integrins and also participate in integrin outside-in signalling, and the control of gene transcription in the cell nucleus. The kindlins are ~75 kDa multidomain proteins and bind to an NPxY motif and upstream T/S cluster of the integrin &#946;-subunit cytoplasmic tail. The hematopoietically-important kindlin isoform, kindlin-3, is critical for platelet aggregation during thrombus formation, leukocyte rolling in response to infection and inflammation and osteoclast podocyte formation in bone resorption. Kindlin-3&#39;s role in these processes has resulted in extensive cellular and physiological studies. However, there is a need for an efficient method of acquiring high quality milligram quantities of the protein for further studies. We have developed a protocol, here described, for the efficient expression and purification of recombinant murine kindlin-3 by use of a baculovirus-driven expression system in Sf9 cells yielding sufficient amounts of high purity full-length protein to allow its biophysical characterization. The same approach could be taken in the study of the other mammalian kindlin isoforms.

Kindlins are fundamental to cell adhesion through integrins but studies of them have been hampered by the difficulty encountered in expressing them recombinantly in bacterial hosts. We describe here methods for their efficient production in baculovirus-infected insect cells.

의 효율적인 생산 및 정제 재조합 쥐과 Kindlin-3 생물 물리학 연구 곤충 세포에서

Kindlins are essential coactivators, with talin, of the cell surface receptors&#160;integrins and also participate in integrin outside-in signalling, and ...

Ex vivo Culture of Mouse Embryonic Skin and Live-imaging of Melanoblast Migration

Melanoblasts are the neural crest derived precursors of melanocytes; the cells responsible for producing the pigment in skin and hair. Melanoblasts migrate through the epidermis of the embryo where they subsequently colonize the developing hair follicles1,2. Neural crest cell migration is extensively studied in vitro but in vivo methods are still not well developed, especially in mammalian systems. One alternative is to use ex vivo organotypic culture3-6. Culture of mouse embryonic skin requires the maintenance of an air-liquid interface (ALI) across the surface of the tissue3,6. High resolution live-imaging of mouse embryonic skin has been hampered by the lack of a good method that not only maintains this ALI but also allows the culture to be inverted and therefore compatible with short working distance objective lenses and most confocal microscopes. This article describes recent improvements to a method that uses a gas permeable membrane to overcome these problems and allow high-resolution confocal imaging of embryonic skin in ex vivo culture6. By using a melanoblast specific Cre-recombinase expressing mouse line combined with the R26YFPR reporter line we are able to fluorescently label the melanoblast population within these skin cultures. The technique allows live-imaging of melanoblasts and observation of their behavior and interactions with the tissue in which they develop. Representative results are included to demonstrate the capability to live-image 6&#160;cultures in parallel.

Ex vivo Culture of Mouse Embryonic Skin and Live-imaging of Melanoblast Migration

We describe the dissection and ex vivo culture of mouse embryonic skin. The culture system maintains an air-liquid interface across the tissue surface and allows imaging on an inverted microscope. Melanoblasts, a component of the developing skin, are fluorescently labeled allowing their behavior to be observed using confocal microscopy.

마우스 배아의 피부와 Melanoblast 이주의 라이브 영상의 생체 문화

Melanoblasts are the neural crest derived precursors of melanocytes; the cells responsible for producing the pigment in skin and hair. Melanoblasts ...

A Simple High Efficiency Protocol for Pancreatic Islet Isolation from Mice

Pancreatic islets, also called the Islets of Langerhans, are a cluster of endocrine cells which produces hormones for glucose regulation and other important biological functions. The islets primarily consist of five types of hormone-secreting cells: &#945; cells secrete glucagon, &#946; cells secrete insulin, &#948; cells secrete somatostatin, &#949; cells secrete ghrelin, and PP cells secrete pancreatic polypeptide. Sixty to 80% of the cells in the islets are &#946; cells, which are the most important cell population to study insulin secretion. Pancreatic islets are a crucial model system to study ex vivo insulin secretion. Acquiring high quality islets is of great importance for diabetes research. Most islet isolation procedures require technically difficult to access site of collagenase injection, harsh and complex digestion procedures, and multiple density gradient purification steps. This paper features a simple high yield mouse islet isolation method with detailed descriptions and realistic demonstrations, showing the following specific steps: 1) injection of collagenase P at the ampulla of Vater, a small area joining the pancreatic duct and the common bile duct, 2) enzymatic digestion and mechanical separation of the exocrine pancreas, and 3) a single gradient purification step. The advantages of this method are the injection of digestive enzyme using the more accessible ampulla of Vater, more complete digestion using combination of enzymatic and mechanical approaches, and a simpler single gradient purification step. This protocol produces approximately 250&#8212;350 islets per mouse; and islets are suitable for various ex vivo studies. Possible caveats of this procedure are potentially damaged islets due to enzymatic digestion and/or prolonged gradient incubation, all of which can be largely avoided by careful ad justification of incubation time.

This islet isolation protocol described a novel route of collagenase injection to digest the exocrine tissue and a simplified gradient procedure to purify the islets from mice. It involves enzymatic digestion, gradient separation/purification, and islet hand-picking. Successful isolation can yield 250&#8211;350 high quality and fully functional islets per mouse.

마우스에서 췌장 췌도 격리를 위한 간단한 고효율 프로토콜

Pancreatic islets, also called the Islets of Langerhans, are a cluster of endocrine cells which produces hormones for glucose regulation and other ...

Isolation and Enrichment of Human Lung Epithelial Progenitor Cells for Organoid Culture

Epithelial organoid models serve as valuable tools to study the basic biology of an organ system and for disease modeling. When grown as organoids, epithelial progenitor cells can self-renew and generate differentiating progeny that exhibit cellular functions similar to those of their in vivo counterparts. Herein we describe a step-by-step protocol to isolate region-specific progenitors from human lung and generate 3D organoid cultures as an experimental and validation tool. We define proximal and distal regions of the lung with the goal of isolating region-specific progenitor cells. We utilized a combination of enzymatic and mechanical dissociation to isolate total cells from the lung and trachea. Specific progenitor cells were then fractionated from the proximal or distal origin cells using fluorescence associated cell sorting (FACS) based on cell type-specific surface markers, such as NGFR&#160;for sorting basal cells and HTII-280 for sorting alveolar type II cells. Isolated basal or alveolar type II progenitors were used to generate 3D organoid cultures. Both distal and proximal progenitors formed organoids with a colony forming efficiency of 9-13% in distal region and 7-10% in proximal region when plated 5000 cell/well on day 30. Distal organoids maintained HTII-280+ alveolar type II cells in culture whereas proximal organoids differentiated into ciliated and secretory cells by day 30. These 3D organoid cultures can be used as an experimental tool for studying the cell biology of lung epithelium and epithelial mesenchymal interactions, as well as for the development and validation of therapeutic strategies targeting epithelial dysfunction in a disease.

This article provides a detailed methodology for tissue dissociation and cellular fractionation approaches allowing enrichment of viable epithelial cells from proximal and distal regions of the human lung. Herein these approaches are applied for the functional analysis of lung epithelial progenitor cells through the use of 3D organoids culture models.

오가노이드 배양을 위한 인간 폐 상피 전구 세포의 분리 및 농축

Epithelial organoid models serve as valuable tools to study the basic biology of an organ system and for disease modeling. When grown as organoids, ...