Bu çalışma NIH hibe 012.031 EY (ET-A), Körlük, Inc (MAZ), New Jersey Lions Göz Araştırma Vakfı (MAZ) Önlemek için bir ödül FM Kirby Vakfı (ET-A), Araştırma, tarafından desteklenen New Jersey (MAZ), Joseph J. ve Marguerite DiSepio Retina Araştırma Fonu (MAZ) ve Janice Mitchell Vassar ve Ashby Mitchell Bursu (AMK) Göz Enstitüsü.

1. Hücre kültürü ekler için özel yapılmış bir stand yapma 5 ml pipet (ISC BioExpress, P-3250-19) tabanı, 13 mm, 10 mm alt boyutu (12.6 mm, dış çapı) (iç çapı) Nunc hücre mükemmel eşleşen bir iç çapı kültür eki (8 mikron, Polikarbonat membran, Termal, # 137.443). Pipet standı yapmak için, 6 mm uzunluğunda içi boş silindir üretmek için baz istasyonunun yakınında kesildi. Sonra parçaları, yaklaşık 5 mm yükseklik ekler kaldırdı bir halka (yüksekliği 2 mm) altında 3 bacaklarda (4 mm yükseklik) oluşturmak için bir alev ısıtılmış bıçak kullanarak silindirin yan çıkarıldı. 2. Domuz retinanın eki ve kültürü için steril filtre kağıdı hazırlanması Whatman 4M Filtre kağıdı (Cat No: 1004) (as sterilizasyonu için ya da bir kez retinaya bağlı olduğu bir cam tüp içine filtre kağıdı taşımak için kullanılan küçük bir üçgen kulplu (çapı 6.3 mm) dairesel bir şekil kesildi video gösterilir). 3. Retina eksplantlar hazırlanması Gözler 5 - 9 aylık 150-230 kg, eski, Amerikan Yorkshire domuz enükleasyon üç saat içinde yerel bir mezbahaya (buz üzerinde taşınan) elde edilmiştir. Varışta, gözleri dışarıdaki doku temizlenir vardı,, betadin çözüm (10% Povidon-İyot, Purdue Frederique Şirket, Stamford, CT) batırılmış ve Dulbecco&#39;nun Modifiye Kartal Orta (1g / L glukoz DMEM, L-glutamin iki kere yıkanır ve sodyum piruvat, Cellgro-Mediatech A.Ş., Manasses, VA) 2.5 mg / ml Amfoterisin B (Gibco-Invitrogen, Carlsbad, CA) ile desteklenmiştir. Ön segment nöral retina açığa çıkarıldı. Altı mm trefin bıçakları (Storz Oftalmik Bausch and Lomb, Manchester, MO), ekvator, tam kalınlıkta arka segment eksplantlar kesmek için kullanılır. Retinanın daha sonra yavaşça ganglion hücre tabakası üzerine bir parça kuru steril filtre kağıdı uygulayarak nöral retina kaldırma ve kültür eklemek üzerine bağlı retina ile filtre kağıdı yerleştirerek, fotoreseptör yukarı bakacak şekilde sıyrılır. Eklemek sonra 12-iyi bir kültür çanak (Fisher), retina tamamen kapsayacak şekilde emin olmak için, kültür ortamı içine yerleştirildi. Birden çok eksplantlarında rutin olarak elde edilen ve tek bir göz kültüre edildi. 4. Doku kültürü Retina dokusunun (MEM, Invitrogen-Gibco-Life Technologies Inc, Rockville, MD), pH 7.4, 0.2 mg / ml glutamin, 10 mg / ml porcine insülin, 1 mM piruvat, 0.1 ile desteklenen Eagle Minimum Essential Orta kültür mM L-askorbik asit, 100 U / ml penisilin, 100 mg / ml streptomisin ve 250 ng / ml amfoterisin B (antimikotik Antibiyotik: Sigma, St Louis, MO) ve nemlendirilmiş% 5 CO 2, denge hava gazlı 37 ° C Orta iki günde bir değiştirildi. Doku, kullanılan reaktifler veya probları çeşitli tedavi veya sonraki biyokimyasal ve morfolojik analizler için tedavi edilmezse olabilir. Aşağıdaki bölümde, tutarlı tam kalınlıkta retina kesitler oluşturmak için prosedürler açıklanmaktadır. 5. Kesit <ol><li> Kriyostat Kullanımı <ol><li> 4 gece 4% parafomaldehyde Fix retina dokusunun ° C; </li><li> Fosfat tamponlu salin (PBS) ile kısaca doku durulayın; </li><li> Bir diseksiyon mikroskobu kullanılarak 35 mm çanak PBS ise filtre kağıdı dikkatlice doku kaldırmak; </li><li> % 30 sukroz doku transferi ve 4 gece boyunca devam ° C; </li><li> Uzakta Emiş doku çevresinde aşırı bir çözüm, doku karşılamak için yeterli Doku-Tek orta (OCT Bileşik 4583) ekleyin ve dokuya nüfuz için 2 saat boyunca oda sıcaklığında bekletme izin; </li><li> Diş balmumu ile kare kare (10 mm x 10 mm, 5 mm yükseklik) oluşturun ve doku çevresinde yer, bir derin dondurucuda bir kare (doku örneği düz olduğundan emin olun) ve yerini doldurmak için daha fazla Doku-Tek orta eklemek (- 20 ° C) en az 1 saat; </li><li> Örnek bir platform (örnek blok platform dik olduğundan emin olun) dondurulmuş örnek blok Transferi; </li><li> Daha önceden soğutulmuş bir Kriyostat Mount örnek platformu (-20 ° C, Leica, CM1900) ve blok bıçak dik olduğundan emin olun; </li><li> Istenilen kalınlıkta doku kesit önce mum ve çerçeve bloğu çıkarın; </li><li> Jelatin tedavi slaytlar bölümlerde yerleştirin. </li></ol></li><li> Vibratome Kullanımı <ol><li> Düzeltme ve doku Kriyostat için yukarıda açıklandığı gibi durulama; </li><li> Doku küçük bir kapta önceden ısıtılmış% 4, erimiş agar içine yerleştirin ve 4 ° C agar congeals kadar tamamen tutmak; </li><li> Küçük bir blok içindeki doku örneği agar kesmek için keskin bir bıçak kullanın; </li><li> Tutkal örnek blok vibratome Krazy yapıştırıcı ile bir numune tutucu (parça doku örneği th platform dik olduğundan emin olune numune tutucu, yani, dik bıçak) ve buzlu su tamamen sular altında örnek blok ile vibratome bir kesit sistemi (Leica Serisi 1000) tutucu monte; </li><li> 50 mikron bölüme örnek blok kesin ve yumuşak bir fırça ile jelatin-tedavi slaytlar üzerine koyun. </li></ol></li></ol> 6. İmmünohistokimya Herhangi bir standart protokol kullanın. Immunolabeled kalınlığında kesitler konfokal mikroskop ile görülebilir. 7. Temsilcisi Sonuçlar: Morfoloji kültür yedi günlük süre boyunca korundu. Kültür öncesi ve sonrası retinanın Görüntüler video mevcuttur.

<ol>
	<li>Johnson, T. V., Martin, K. R. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Development+and+characterization+of+an+adult+retinal+explant+organotypic+tissue+culture+system+as+an+in+vitro+intraocular+stem+cell+transplantation+model.">Development and characterization of an adult retinal explant organotypic tissue culture system as an in vitro intraocular stem cell transplantation model.</a> Invest Ophthalmol Vis Sci. 49, 3503-3512 (2008).</li><li>Kretz, A., Marticke, J. K., Happold, C. J., Schmeer, C., Isenmann, S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=A+primary+culture+technique+of+adult+retina+for+regeneration+studies+on+adult+CNS+neurons.">A primary culture technique of adult retina for regeneration studies on adult CNS neurons.</a> Nat Protoc. 2, 131-140 (2007).</li><li>Donovan, S. L., Dyer, M. A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Preparation+and+square+wave+electroporation+of+retinal+explant+cultures.">Preparation and square wave electroporation of retinal explant cultures.</a> Nat Protoc. 1, 2710-2718 (2006).</li><li>Koizumi, A., Zeck, G., Ben, Y., Masland, R. H., Jakobs, T. C. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Organotypic+culture+of+physiologically+functional+adult+mammalian+retinas.">Organotypic culture of physiologically functional adult mammalian retinas.</a> PLoS One. 2, e221-e221 (2007).</li><li>Lye, M. H., Jakobs, T. C., Masland, R. H., Koizumi, A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Organotypic+culture+of+adult+rabbit+retina.">Organotypic culture of adult rabbit retina.</a> J Vis Exp. , (2007).</li><li>Ames, A., Li, Y. Y., Heher, E. C., Kimble, C. R. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Energy+metabolism+of+rabbit+retina+as+related+to+function:+high+cost+of+Na++transport.">Energy metabolism of rabbit retina as related to function: high cost of Na+ transport.</a> J Neurosci. 12, 840-853 (1992).</li><li>Kobuch, K. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Maintenance+of+adult+porcine+retina+and+retinal+pigment+epithelium+in+perfusion+culture:+characterisation+of+an+organotypic+in+vitro+model.">Maintenance of adult porcine retina and retinal pigment epithelium in perfusion culture: characterisation of an organotypic in vitro model.</a> Exp Eye Res. 86, 661-668 (2008).</li><li>Kaempf, S., Walter, P., Salz, A. K., Thumann, G. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Novel+organotypic+culture+model+of+adult+mammalian+neurosensory+retina+in+co-culture+with+retinal+pigment+epithelium.">Novel organotypic culture model of adult mammalian neurosensory retina in co-culture with retinal pigment epithelium.</a> J Neurosci Methods. 173, 47-58 (2008).</li><li>Guduric-Fuchs, J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Immunohistochemical+study+of+pig+retinal+development.">Immunohistochemical study of pig retinal development.</a> Mol Vis. 15, 1915-1928 (2009).</li><li>Chandler, M. J., Smith, P. J., Samuelson, D. A., MacKay, E. O. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Photoreceptor+density+of+the+domestic+pig+retina.">Photoreceptor density of the domestic pig retina.</a> Vet Ophthalmol. 2, 179-184 (1999).</li></ol>

Vizyon araştırmacılar, retina kök hücre nakli 1, retina rejenerasyon 2, ve dışsal gen ekspresyonu 3-5 gibi çeşitli sorunları, çalışma Organotipik sistemleri de dahil olmak üzere, çeşitli retina kültür sistemleri kurduk . Ancak, yetişkin memeli retina, in vitro fotoreseptörlerin 6 yüksek enerji talepleri nedeniyle muhafaza edilmesi güçtür. Koizumi ve ark. Fotoreseptörlerin için oksijen kaynağı, kültür eklemek yüksekliği yükselt...

<table border="1"><tbody><tr><td> Reaktifin Adı </td><td> Şirket </td><td> Katalog numarası </td><td> Yorumlar </td></tr><tr><td> MEM </td><td> Invitrogen-Gibco </td><td> 10370-021 </td><td></td></tr><tr><td> 5 ml pipet </td><td> ISC BioExpress </td><td> P-3250-19 </td><td></td></tr><tr><td> Nunc hücre kültürü eklemek </td><td> Termal </td><td> 137443 </td><td> 8μm, Polikarbonat </td></tr><tr><td> Whatman 4M Filtre kağıdı </td><td> Whatman </td><td> 1004 </td><td></td></tr><tr><td> DMEM </td><td> Cellgro-Mediatech Inc. </td><td> 10-013-CV </td><td></td></tr><tr><td> Agar </td><td> Fluka </td><td> 05040 </td><td></td></tr><tr><td> Fungizone Amfoterisin B </td><td> Invitrogen-Gibco </td><td> 15290018 </td><td></td></tr><tr><td> Trefin bıçaklar </td><td> Bausch &amp; Lomb </td><td> T3096 </td><td> 6.00mm </td></tr><tr><td> Ekim Bileşik </td><td> Elektron Mikroskopi Bilimler </td><td> 62550-01 </td><td> 4583 </td></tr><tr><td></td><td> Bilimler </td><td></td><td></td></tr><tr><td> Kriyostat </td><td> Leica </td><td> CM1900 </td><td></td></tr><tr><td> Vibratome </td><td> Leica </td><td> 1000 Serisi </td><td></td></tr><tr><td> Mikroskopisi; </td><td> Carl Zeiss </td><td> LSM510 </td><td></td></tr><tr><td> Anti-Synaptic veziküllü Protein 2 (SV2) fare monoklonal antikor </td><td> DSHB </td><td> N / A </td><td></td></tr><tr><td> Anti-glial fibriler asidik protein (GFAP) poliklonal tavşan antikoru </td><td> DAKO </td><td> DAKO </td><td></td></tr><tr><td> Propidium İyodür (PI) </td><td> Sigma </td><td> P4170 </td><td></td></tr></tbody></table>

organotypic culture of full-thickness adult porcine retina

Hayvan deneylerinde değiştirmek veya azaltabilir in vitro modeller için tanınan bir talep vardır. Domuz retina nöronal insan retina benzer bir yapısı vardır ve bu nedenle insan retina hasarı ve dejeneratif hastalık mekanizmaları çalışmak için değerli bir türdür. Burada bir mezbahaya elde gözleri izole yetişkin porcine retinanın Organotipik kültürü için bir maliyet-etkin bir tekniktir. Ön segment çıkardıktan sonra, trefin bıçak yetişkin porcine gözlerin arka segment birden fazla nöral retina Bruch membran RPE-koroid-sklerasına eksplantlar oluşturmak için kullanılmıştır. Nöral retina her eksplant kaldırmak için bir parça steril filtre kağıdı kullanıldı. Filtre kağıdı-retina kompleks, ısmarlama stand kültür çanak alt uzak yapıldı bir ekleme tepesine (en fotoreseptör yan) kültüre edildi. Stand retinanın her iki taraf için kültür ortamı iyi sirkülasyonu sağlar. Genel olarak, bu işlem tekrarlanabilir, basit ve en az yedi gün için doğal retina yapısının korunmasına izin verir, bir memeli retina üzerine çeşitli morfolojik, farmakolojik ve biyokimyasal çalışmalar için faydalı model.

Watch this Scientific Journal Video about Organotypic Culture of Full-thickness Adult Porcine Retina at JoVE.com

Organotypic Culture of Full-thickness Adult Porcine Retina

Burada yedi gün yetişkin porcine retinanın Organotipik kültürü için bir maliyet-etkin bir yöntem açıklanmaktadır. Kısaca, steril bir filtre kağıdı nöral retina ısmarlama stand tarafından gündeme getirilen bir ekleme RPE ve yer fotoreseptör yüzü yukarı kaldırmak için kullanılır oldu.

Tam kalınlıkta Yetişkin Domuz Retina Organotipik Kültür

There is a recognized demand for in vitro models that can replace or reduce animal experiments. Porcine retina has a similar neuronal structure to human ...

organotypic-culture-of-full-thickness-adult-porcine-retina

Research

JoVE Journal

Neuroscience

14.9K Görüntüleme.  University of Medicine and Dentistry of New Jersey - UMDNJ. Burada yedi gün yetişkin porcine retinanın Organotipik kültürü için bir maliyet-etkin bir yöntem açıklanmaktadır. Kısaca, steril bir filtre kağıdı nöral retina ısmarlama stand tarafından gündeme getirilen bir ekleme RPE ve yer fotoreseptör yüzü yukarı kaldırmak için kullanılır oldu.

Video: Organotypic Culture of Full-thickness Adult Porcine Retina

The Organotypic Hippocampal Slice Culture Model for Examining Neuronal Injury

Organotypic hippocampal slice culture is an in vitro method to examine mechanisms of neuronal injury in which the basic architecture and composition of the hippocampus is relatively preserved 1. The organotypic culture system allows for the examination of neuronal, astrocytic and microglial effects, but as an ex vivo preparation, does not address effects of blood flow, or recruitment of peripheral inflammatory cells. To that end, this culture method is frequently used to examine excitotoxic and hypoxic injury to pyramidal neurons of the hippocampus, but has also been used to examine the inflammatory response. Herein we describe the methods for generating hippocampal slice cultures from postnatal rodent brain, administering toxic stimuli to induce neuronal injury, and assaying and quantifying hippocampal neuronal death.

The organoptypic hippocampal slice culture model is an in vitro model used to examine neuronal injury in a variety of paradigms. In this article, we describe the methods for generating slice cultures and quantifying neuronal injury.

Nöronal Sakatlık incelenmesi için Organotipik Hipokampal Dilim Kültür Modeli

Organotypic hippocampal slice culture is an in vitro method to examine mechanisms of neuronal injury in which the basic architecture and composition of ...

Nörobilim

Organotypic Slice Culture of GFP-expressing Mouse Embryos for Real-time Imaging of Peripheral Nerve Outgrowth

For many purposes, the cultivation of mouse embryos ex vivo as organotypic slices is desirable. For example, we employ a transgenic mouse line (tauGFP) in which the enhanced version of the green fluorescent protein (EGFP) is exclusively expressed in all neurons of the developing central and peripheral nervous system1, allowing the possibility to both film the innervation of the forelimb and to manipulate this process with pharmacological and genetic techniques2. The most critical parameter in the successful cultivation of such slice cultures is the method by which the slices are prepared. After extensive testing of a variety of methods, we have found that a vibratome is the best possible device to slice the embryos such that they routinely result in a culture that demonstrates viability over a period of several days, and most importantly, develops in an age-specific manner. For mid-gestation embryos, this includes the normal outgrowth of spinal nerves from the spinal cord and the dorsal root ganglia to their targets in the periphery and the proper determination of skeletal and muscle tissue. 
In this work, we present a method for processing whole embryos of embryonic day (E) E10 to E12 into 300 - 400 micrometer slices for cultivation in a standard tissue culture incubator, which can be studied for up to two days after slice preparation. Critical for the success of this approach is the use of a vibratome to slice each agarose-embedded embryo. This is followed by the cultivation of the slices upon Millicell culture membrane inserts placed upon a small volume of medium, resulting in an interface culture technique. One litter with an average of 7 embryos routinely produces at least 14 slices (2-3 slices of the forelimb region per embryo), which varies slightly due to the age of the embryos as well as to the thickness of the slices. About 80% of the cultured slices show nerve outgrowth, which can be measured througout the culturing period2. Representative results using the tauGFP mouse line are demonstrated.

We present a method to prepare organotypic slices of mid-gestation mouse embryos for the cultivation and time-lapse imaging of peripheral nerve outgrowth.

Organotipik Dilim Kültür GFP-Periferik Sinir akıbet Gerçek zamanlı Görüntüleme Fare Embriyolar ifade

For many purposes, the cultivation of mouse embryos ex vivo as organotypic slices is desirable. For example, we employ a transgenic mouse line (tauGFP) in ...

Organotypic Hippocampal Slice Cultures

The hippocampus, a component of the limbic system, plays important roles in long-term memory and spatial navigation 1. Hippocampal neurons can modify the strength of their connections after brief periods of strong activation. This phenomenon, known as long-term potentiation (LTP) can last for hours or days and has become the best candidate mechanism for learning and memory 2. In addition, the well defined anatomy and connectivity of the hippocampus 3 has made it a classical model system to study synaptic transmission and synaptic plasticity4.
As our understanding of the physiology of hippocampal synapses grew and molecular players became identified, a need to manipulate synaptic proteins became imperative. Organotypic hippocampal cultures offer the possibility for easy gene manipulation and precise pharmacological intervention but maintain synaptic organization that is critical to understanding synapse function in a more naturalistic context than routine culture dissociated neurons methods.
Here we present a method to prepare and culture hippocampal slices that can be easily adapted to other brain regions. This method allows easy access to the slices for genetic manipulation using different approaches like viral infection 5,6 or biolistics 7. In addition, slices can be easily recovered for biochemical assays 8, or transferred to microscopes for imaging 9 or electrophysiological experiments 10.

We describe a method to prepare organotypic hippocampal slices that can be easily adapted to other brain regions. Brain slices are laid on porous membranes and culture media is allowed to form an interface. This method preserves the gross architecture of the hippocampus for up to 2 weeks in culture.

Organotipik Hipokampal Dilim Kültürler

The hippocampus, a component of the limbic system, plays important roles in long-term memory and spatial navigation 1. Hippocampal neurons can modify the ...

In vivo Electroporation of Developing Mouse Retina

The functional characterization of genes expressed during mammalian retinal development remains a significant challenge. Gene targeting to generate constitutive or conditional loss of function knockouts remains cost and labor intensive, as well as time consuming. Adding to these challenges, retina expressed genes may have essential roles outside the retina leading to unintended confounds when using a knockout approach. Furthermore, the ability to ectopically express a gene in a gain of function experiment can be extremely valuable when attempting to identify a role in cell fate specification and/or terminal differentiation.
We present a method for the rapid and efficient incorporation of DNA plasmids into the neonatal mouse retina by electroporation. The application of short electrical impulses above a certain field strength results in a transient increase in plasma membrane permeability, facilitating the transfer of material across the membrane 1,2,3,4. Groundbreaking work demonstrated that electroporation could be utilized as a method of gene transfer into mammalian cells by inducing the formation of hydrophilic plasma membrane pores allowing the passage of highly charged DNA through the lipid bilayer 5. Continuous technical development has resulted in the viability of electroporation as a method for in vivo gene transfer in multiple mouse tissues including the retina, the method for which is described herein 6, 7, 8, 9, 10. 
DNA solution is injected into the subretinal space so that DNA is placed between the retinal pigmented epithelium and retina of the neonatal (P0) mouse and electrical pulses are applied using a tweezer electrode. The lateral placement of the eyes in the mouse allows for the easy orientation of the tweezer electrode to the necessary negative pole-DNA-retina-positive pole alignment. Extensive incorporation and expression of transferred genes can be identified by postnatal day 2 (P2). Due to the lack of significant lateral migration of cells in the retina, electroporated and non-electroporated regions are generated. Non-electroporated regions may serve as internal histological controls where appropriate. 
Retinal electroporation can be used to express a gene under a ubiquitous promoter, such as CAG, or to disrupt gene function using shRNA constructs or Cre-recombinase. More targeted expression can be achieved by designing constructs with cell specific gene promoters. Visualization of electroporated cells is achieved using bicistronic constructs expressing GFP or by co-electroporating a GFP expression construct. Furthermore, multiple constructs may be electroporated for the study of combinatorial gene effects or simultaneous gain and loss of function of different genes. Retinal electroporation may also be utilized for the analysis of genomic cis-regulatory elements by generating appropriate expression constructs and deletion mutants. Such experiments can be used to identify cis-regulatory regions sufficient or required for cell specific gene expression 11. Potential experiments are limited only by construct availability.

In vivo Electroporation of Developing Mouse Retina

A method for the incorporation of plasmid DNA into murine retinal cells for the purpose of performing either gain- or loss of function studies in vivo is presented. This method capitalizes on the transient increase in permeability of cell plasma membranes induced by the application of an external electrical field.

Gelişmekte olan Fare Retina in vivo Elektroporasyon olarak

The functional characterization of genes expressed during mammalian retinal development remains a significant challenge.  Gene targeting to generate ...

Assessment of Vascular Regeneration in the CNS Using the Mouse Retina

The rodent retina is perhaps the most accessible mammalian system in which to investigate neurovascular interplay within the central nervous system (CNS). It is increasingly being recognized that several neurodegenerative diseases such as Alzheimer&#8217;s, multiple sclerosis, and amyotrophic lateral sclerosis present elements of vascular compromise. In addition, the most prominent causes of blindness in pediatric and working age populations (retinopathy of prematurity and diabetic retinopathy, respectively) are characterized by vascular degeneration and failure of physiological vascular regrowth. The aim of this technical paper is to provide a detailed protocol to study CNS vascular regeneration in the retina. The method can be employed to elucidate molecular mechanisms that lead to failure of vascular growth after ischemic injury. In addition, potential therapeutic modalities to accelerate and restore healthy vascular plexuses can be explored. Findings obtained using the described approach may provide therapeutic avenues for ischemic retinopathies such as that of diabetes or prematurity and possibly benefit other vascular disorders of the CNS.

The rodent retina has long been recognized as an accessible window to the brain. In this technical paper we provide a protocol that employs the mouse model of oxygen-induced retinopathy to study the mechanisms that lead to failure of vascular regeneration within the central nervous system after ischemic injury. The described system can also be harnessed to explore strategies to promote regrowth of functional blood vessels within the retina and CNS.

Fare Retina kullanma CNS&#39;deki Vasküler Rejenerasyon Değerlendirilmesi

The rodent retina is perhaps the most accessible mammalian system in which to investigate neurovascular interplay within the central nervous system (CNS). ...

Isolation and Culture of Adult Neural Stem Cells from the Mouse Subcallosal Zone

Adult neural stem cells (aNSCs) can be used for the regeneration of damaged brain tissue. NSCs have the potential for differentiation and proliferation into three types of cells: neurons, astrocytes, and oligodendrocytes. Identifying aNSC-derived regions and characterizing the aNSC properties are critical for the potential use of aNSCs and for the elucidation of their role in neural regeneration. The subcallosal zone (SCZ), located between white matter and the hippocampus, has recently been reported to contain aNSCs and continuously give rise to neuroblasts. A low percentage of aNSCs from the SCZ is differentiated into neurons; most cells are differentiated into glial cells, such as oligodendrocytes and astrocytes. These cells are suggested to have a therapeutic potential for traumatic cortical injury. This protocol describes in detail the process to generate SCZ-aNSCs from an adult mouse brain. A brain matrix with intervals of 1 mm is used to obtain the SCZ-containing coronal slices and to precisely dissect the SCZ from the whole brain. The SCZ sections are initially subjected to a neurosphere culture. A well-developed culture system allows for the verification of their characteristics and can increase research on NSCs. A neurosphere culture system provides a useful tool for determining proliferation and collecting the genuine NSCs. A monolayer culture is also an in vitro system to assay proliferation and differentiation. Significantly, this culture system provides a more homogenous environment for NSCs than the neurosphere culture system. Thus, using a discrete brain region, these culture systems will be helpful for expanding our knowledge about aNSCs and their applications for therapeutic uses.

Establishing culture systems for the expansion of adult neural stem cells (aNSCs) allows for the examination and application of aNSCs for therapy. The subcallosal zone (SCZ) has recently been recognized as a novel neuroblast-forming region in adult mice. Here, methods for the isolation, expansion, and differentiation of SCZ-aNSCs are described.

Fare Subcallosal Zone İzolasyon ve Yetişkin Nöral Kök Hücre Kültürü

Adult neural stem cells (aNSCs) can be used for the regeneration of damaged brain tissue. NSCs have the potential for differentiation and proliferation ...

Preparation of Horizontal Slices of Adult Mouse Retina for Electrophysiological Studies

Vertical slice preparations are well established to study circuitry and signal transmission in the adult mammalian retina. The plane of sectioning in these preparations is perpendicular to the retinal surface, making it ideal for the study of radially oriented neurons like photoreceptors and bipolar cells. However, the large dendritic arbors of horizontal cells, wide-field amacrine cells, and ganglion cells are mostly truncated, leaving markedly reduced synaptic activity in these cells. Whereas ganglion cells and displaced amacrine cells can be studied in a whole-mounted preparation of the retina, horizontal cells and amacrine cells located in the inner nuclear layer are only poorly accessible for electrodes in whole retina tissue.
To achieve maximum accessibility and synaptic integrity, we developed a horizontal slice preparation of the mouse retina, and studied signal transmission at the synapse between photoreceptors and horizontal cells. Horizontal sectioning allows&#160;(1) easy and unambiguous visual identification of horizontal cell bodies for electrode targeting, and (2) preservation of the extended horizontal cell dendritic fields, as a prerequisite for intact and functional cone synaptic input to horizontal cell dendrites.
Horizontal cells from horizontal slices exhibited tonic synaptic activity in the dark, and they responded to brief flashes of light with a reduction of inward current and diminished synaptic activity. Immunocytochemical evidence indicates that almost all cones within the dendritic field of a horizontal cell establish synapses with its peripheral dendrites. The horizontal slice preparation is therefore well suited to study the physiological properties of horizontally extended retinal neurons as well as sensory signal transmission and integration across selected synapses.

We developed a horizontal slice preparation of the adult mammalian retina with the plane of sectioning parallel to the retinal surface. Dendritic fields of nonradially oriented retinal neurons were not truncated, allowing the study of signal processing with patch-clamp and imaging techniques.

Elektrofizyolojik Çalışmalar Yetişkin Fare Retina Yatay Dilimleri hazırlanması

Vertical slice preparations are well established to study circuitry and signal transmission in the adult mammalian retina. The plane of sectioning in ...

Time-lapse Confocal Imaging of Migrating Neurons in Organotypic Slice Culture of Embryonic Mouse Brain Using In Utero Electroporation

In utero electroporation is a rapid and powerful approach to study the process of radial migration in the cerebral cortex of developing mouse embryos. It has helped to describe the different steps of radial migration and characterize the molecular mechanisms controlling this process. To directly and dynamically analyze migrating neurons they have to be traced over time. This protocol describes a workflow that combines in utero electroporation with organotypic slice culture and time-lapse confocal imaging, which allows for a direct examination and dynamic analysis of radially migrating cortical neurons. Furthermore, detailed characterization of migrating neurons, such as migration speed, speed profiles, as well as radial orientation changes, is possible. The method can easily be adapted to perform functional analyses of genes of interest in radially migrating cortical neurons by loss and gain of function as well as rescue experiments. Time-lapse imaging of migrating neurons is a state-of-the-art technique that once established is a potent tool to study the development of the cerebral cortex in mouse models of neuronal migration disorders.

Time-lapse Confocal Imaging of Migrating Neurons in Organotypic Slice Culture of Embryonic Mouse Brain Using In Utero Electroporation

This protocol provides instructions for direct observation of radially migrating cortical neurons. In utero electroporation, organotypic slice culture, and time-lapse confocal imaging are combined to directly and dynamically study the effects of overexpression or downregulation of genes of interest in migrating neurons and to analyze their differentiation during development.

Embriyonik Fare Beyni Organotipik Dilim Kültüründe Nöronların Geçiş Sürekli Konfokal Görüntüleme Kullanımı<em&gt; Utero&#39;da</em&gt; Elektroporasyon

In utero electroporation is a rapid and powerful approach to study the process of radial migration in the cerebral cortex of developing mouse embryos. It ...

Isolation and Culture of Primary Neurons and Glia from Adult Rat Urinary Bladder

The lower urinary tract has two main functions, namely, periodic urine storage and micturition; these functions are mediated through central and peripheral neuroregulation. Although extensive research on the lower urinary tract nervous system has been conducted, most studies have focused on primary culture. This protocol introduces a method for the isolation and culture of bladder neurons and glia from Sprague&#8211;Dawley rats. In this method, the neurons and glia were incubated in a 37 &#176;C, 5% CO2 incubator for 5&#8211;7 days. As a result, they grew into mature shapes suitable for related subsequent immunofluorescence experiments. Cells were morphologically observed using an optical microscope. Neurons, synaptic vesicles, and glia were identified by &#946;-III-tubulin and MAP-2, Synapsin-1, and GFAP staining, respectively. Meanwhile, immunocytochemistry was performed on several neurotransmitter-related proteins, such as choline acetyltransferase, DYNLL2, and SLC17A9.

This protocol attempts to establish a repeatable protocol for primary neurons and glia isolation from rat bladder for further cellular experiments.

Yetişkin Sıçan İdrar Kesesinden Primer Nöronların ve Gliaların İzolasyonu ve Kültürü

The lower urinary tract has two main functions, namely, periodic urine storage and micturition; these functions are mediated through central and ...

Culture of Neurospheres Derived from the Neurogenic Niches in Adult Prairie Voles

Neurospheres are primary cell aggregates that comprise neural stem cells and progenitor cells. These 3D structures are an excellent tool to determine the differentiation and proliferation potential of neural stem cells, as well as to generate cell lines than can be assayed over time. Also, neurospheres can create a niche (in vitro) that allows the modeling of the dynamic changing environment, such as varying growth factors, hormones, neurotransmitters, among others. Microtus ochrogaster (prairie vole) is a unique model for understanding the neurobiological basis of socio-sexual behaviors and social cognition. However, the cellular mechanisms involved in these behaviors are not well known. The protocol aims to obtain neural progenitor cells from the neurogenic niches of the adult prairie vole, which are cultured under non-adherent conditions, to generate neurospheres. The size and number of neurospheres depend on the region (subventricular zone or dentate gyrus) and sex of the prairie vole. This method is a remarkable tool to study sex-dependent differences in neurogenic niches in vitro and the neuroplasticity changes associated with social behaviors such as pair bonding and biparental care. Also, cognitive conditions that entail deficits in social interactions (autism spectrum disorders and schizophrenia) could be examined.

We established the conditions to culture neural progenitor cells from the subventricular zone and dentate gyrus of the adult brain of prairie voles, as a complementary in vitro study, to analyze the sex-dependent differences between neurogenic niches that could be part of functional plastic changes associated with social behaviors.

Yetişkin Çayır Voles Nörojenik Nişler Türetilmiş Nörosferkültürü

Neurospheres are primary cell aggregates that comprise neural stem cells and progenitor cells. These 3D structures are an excellent tool to determine the ...