Bu çalışma NIH hibe (R15DA029863) tarafından desteklenmiştir, Florida Atlantic Üniversitesi lisans araştırma bursu (M30014) ve Veterinerlik Araştırma hibe Ross Üniversitesi. Biz bu iş için (±) 3,4-metilendioksimetamfetamin (± MDMA) sağlamak için Uyuşturucu Bağımlılığı Ulusal Enstitüsü (Rockville, MD) teşekkür etmek istiyorum.

Aşağıda açıklanan Hayvan kullanım prosedürleri Veteriner Ross Üniversitesi Kurumsal Hayvan Bakım ve Kullanım Komitesi (IACUC) ve Florida Atlantic University tarafından onaylanmıştır. Steril teknikler ve eldiven gerekli olmasına rağmen, bu protokolü kullanarak, RNaz içermeyen ortamda gerekli değildir. 1. Hazırlık <ol><li> Doku hazırlanması ve kesit <ol><li> Üç gruba rastgele Fareleri atama:;, SAL / öneki ve / 3,4-metilendioksimetamfetamin önüne taze / tuz (% 0.9 NaCI SAL) (MDMA, Tablo 1&#39;de ayrıntıları bakınız). </li><li> 2 saat aralığında SAL ve MDMA grupları, intraperitonal, sırası ile 1 ml / kg SAL ve 10 mg / kg MDMA üç doz uygulayın. Hayvanlar 6 gün boyunca tedavi hayatta izin verin. </li><li> 7. günde, 5 mg kombinasyon halinde 100 mg / kg ketamin uygulama / periton içine derin bir anestezi için sıçanlarda (kadar ksilazin kg, yani kornea yanıp sönme ve ta kaybıil) refleksleri çimdik. </li><li> Taze / SAL grubunda, hızlı fareleri başını kesmek ve (referans 5 detaylarını görmek) taze beyin testi için beyin kaldırmak. </li><li> SAL / öneki ve öneki / MDMA grupları için, sternum yaklaşık 10 -12 cm boyunca bir kesim yapmak ve daha sonra sternum sonunu maruz. </li><li> Hemostatla sternum ucunu tutun ve keskin bir makas ile her iki tarafta yanal diyafram kesilmiş ve sonra akciğerlere kaburga ve paralel boyunca yukarı kesti. </li><li> Tek bir el ile, küçük forseps ile kalbin ventral ucunu tutun. Öte yandan ile, 18 G şırınga iğnesiyle sol ventrikül delmek (buz soğukluğunda SAL ve paraformaldehit konteyner ve peristaltik pompa için bir Y-şekilli silikon hortum ile bağlantılı olan iğne bağdaştırıcı yönüne dikkat edin, bakınız, referans 9). </li><li> Akış hızı (~ 5 ml / dk) orta düzeyde SAL pompası açın ve getiri circ kaçmasını sağlamak için forseps ile sağ atrium delinmeulation. 30 dakika boyunca SAL perfüzyon koruyun. </li><li> Orta düzeyde paraformaldehid pompası açın ve buz gibi soğuk% 4 paraformaldehid 30 dakika süreyle hayvan serpmek için izin verir. </li><li> Perfüzyon aleti çıkarın ve hayvan başını kesmek. Kafatası orta hat boyunca kesilmiş bir posteroanterior yapın ve sonra kafatası boşluğu 10 maruz kafatası flap. </li><li> Kafatası boşluğundan bir spatula ile beyin çıkarın ve 25 ml% 4 paraformaldehid içeren 50 ml&#39;lik bir santrifüj tüpüne beyin yerleştirin. 24 saat süreyle 4 ° C buzdolabı da paraformaldehid içeren tüp içinde beyin tutun. </li><li> 3 gün boyunca 4 ° C&#39;de% 30 sukroz çözeltisi 25 ml içeren 50 ml&#39;lik bir santrifüj tüpü içine beyin taşıyın. Son olarak, kullanıcı kadar -80 ° C&#39;de plastik torbalar içinde beyin saklayın. </li><li> Gömme medya ile bir aynanın üzerinde beyin takın ve -26 ºC sıcaklıkta bir kriyostat beyin içeren gömme medya dondurma. Taze dondu Cutn 20 mikron bölüme beyin ve 10 mikron bölüme beyin paraformaldehid-öneki. Bölümüne slayt dokunarak RT mikroskop lamı bölümü aktarın. </li><li> Hava, kuru 4 saat oda sıcaklığında karıştırıldı. Kullanım kadar -80 ° C&#39;de sıkı kapatılmış torbaya bölümü slaytlar saklayın. </li></ol></li><li> Dehidrasyon <ol><li> -80 ° C derin dondurucuda slaytları alın ve üç testleri içine bölümleri atayın: HT2A, ppiB (pozitif kontrol) ya da dapB (negatif kontrol); işareti ve bir tükenmez kalem ile etiket bölümleri (kalem kullanmayın). 5 dakika boyunca oda sıcaklığında% 100 alkol slaytlar daldırın. Davlumbaz 5 dakika boyunca slaytlar kurulayın. </li></ol></li><li> Tedavi öncesi <ol><li> Pipet slaytlar bölümlerine Tedavi öncesi-1 reaktif 20 ul (alkalin fosfataz inaktivasyonu). Bir nem tepsisine bir raf ray üzerinde slaytlar yerleştirin (tepsi reaksiyon solutio buharlaşma önlemek için yüksek nem korumak için bir kapak ile örtülü olduğuna dikkatn). </li><li> Yavaşça 10 dakika için düşük hızda yatay çalkalayıcı üzerinde nem tepsisini sallayın. 2 dakika boyunca iki kez damıtılmış su (GKD 2 O) ile iki kez slaytlar yıkayın. (Paraformaldehid sabitleme ile indüklenen çapraz-bağların kırılması) ön tedavi-2 reaktifin 150 ml içeren 200 ml&#39;lik bir cam slayt daldırın. 100 ° C (RNA yapısı 11 ısı ile indüklenen restorasyonu) 5 dakika toplam slaytlar kaynatılır. </li><li> 2 dakika boyunca GKD 2 O ile iki kez slaytlar yıkayın. 5 dakika boyunca% 100 alkol slaytlar yerleştirin. Bir çeker ocak içinde 5 dakika için slaytlar kurutun. Doku bölümünde seçilen alanın etrafında bir daire çizmek için bir hidrofobik kalem kullanın (örneğin, Şekil 2&#39;de belirtildiği gibi talamus ve hipotalamus dahil olmayan kortikal yapılar). </li><li> Pipet Ön İşlem-3 reaktifi Seçilen her alana (prob penetrasyon artış) 10 ul ve kapaklı nem tepsisini kapatın. Hibridizasyon fırında tepsi yerleştirinYatay çalkalayıcı ile donatılmış ve 40 ºC de fırın sıcaklığını ayarlamak; yavaşça 30 dakika süreyle tepsiyi sallayın. 2 dakika boyunca GKD 2 O ile iki kez slaytlar yıkayın. </li></ol></li></ol> 2. Hibridizasyon ve amplifikasyon <ol><li> Pipet seçilmiş alanlarda sırasıyla htr2a ppiB ve dapB prob reaktifler 10 ul,. Reaktifin buharlaşmasını önlemek için kapaklı nem tepsisini örtün. Yavaşça düşük hızda ayarlanmış yatay çalkalayıcı üzerinde sallayın. 2 saat boyunca fırında 40 ºC &#39;de slaytlar inkübe edin. </li><li> 2 dakika için bir yıkama tamponu ile iki kez slaytlar yıkayın. Pipet seçilen her alanda Amplifikasyon-1 reaktif 10 ul, sallamak ve 30 dakika boyunca 40 ºC de slaytlar kuluçkaya yatmaktadır. </li><li> 2 dakika için bir yıkama tamponu ile iki kez slaytlar yıkayın. Pipet seçilen her alanda Amplifikasyon-2 reaktif 10 ul, sallamak ve 15 dakika boyunca 40 ºC de slaytlar kuluçkaya yatmaktadır. </li><li> İki kez w slaytlar yıkayın2 dakika için bir yıkama tamponu i. Pipet seçilen her alanda Amplifikasyon-3 reaktif 10 ul, sallamak ve 30 dakika boyunca 40 ºC de slaytlar kuluçkaya yatmaktadır. </li><li> 2 dakika için bir yıkama tamponu ile iki kez slaytlar yıkayın. Pipet seçilen her alanda Amplifikasyon-4 reaktif 10 ul, sallamak ve 15 dakika boyunca 40 ºC de slaytlar kuluçkaya yatmaktadır. </li><li> 2 dakika için bir yıkama tamponu ile iki kez slaytlar yıkayın. Pipet seçilen her alanda amplifikasyonu-5 reaktifi 10 ul sarsıntı ve 30 dakika boyunca oda sıcaklığında inkübe slaytlar. </li><li> 2 dakika için bir yıkama tamponu ile iki kez slaytlar yıkayın. Pipet seçilen her alanda amplifikasyonu-6 reaktifi 10 ul sarsıntı ve 15 dakika boyunca oda sıcaklığında inkübe slaytlar. 2 dakika için bir yıkama tamponu ile iki kez slaytlar yıkayın. </li></ol> 3. Sinyal Algılama <ol><li> Seçilen her alana Kırmızı reaktif Pipet 10 ul (reaktif kırmızı-B ve Kızıl-A karışımı bir 1:60 oranında ve i kullanılması gerektiğini unutmayınmmediately). RT&#39;de yatay çalkalayıcı üzerinde nem tepsisine slayt yerleştirin ve 10 dakika boyunca düşük bir hızda yavaşça sallayın. </li><li> 10 dakika boyunca (GKD 2 O) ile iki kez slaytlar yıkayın. 15 dakika fırında 60 ºC &#39;de slaytlar kurulayın. 5 dakika boyunca davlumbaz altında ksilen slaytlar yerleştirin. Pipet 20 Seçilen her alanda ksilen bazlı montaj medya ul ve bir lamel ile kaplayın. </li></ol> 4. Görüntü Yakalama <ol><li> 4 × ve 20 × objektif lens büyütme ile seçilmiş alanlarda (örneğin, hipotalamus, 1 ve 3 Şekiller) dijital Mikro fotoğraflar çekin. Görüntü dosyasını kaydedin. </li></ol> 5. Görüntü Parçacık Analizi <ol><li> Sürükle ve ana ImageJ penceresinin içine görüntü dosya açılır. Menü çubuğuna gidin ve &#39;Resmi&#39; seçeneğini, yanındaki açılır menüden &#39;Tip&#39; seçin ve &#39;8-bit&#39; seçeneğini seçin. </li><li> Seçin &#39;Thr seçin&#39; ayarlama &#39;eshold &#39;iletişim kutusunu açmak için. Istenmeyen arka plan çıkarılır, böylece iletişim kutusunda alt bar değerini ayarlayın. Daha sonra ikinci bir iletişim kutusunu açmak için &#39;Parçacıklar Analiz&#39; seçeneğini menü çubuğuna gidin ve &#39;Analiz&#39; seçeneğini seçin. </li><li> 10&#39;da partikül boyutunu ayarlama, yanındaki &#39;Show özetliyor&#39; seçin ve &#39;sonuçlarını görüntüle &quot;ve&quot; özetlemek&#39; kutularını seçin. Son olarak, iletişim kutularındaki parçacık verileri görüntülemek için &#39;Tamam&#39; ı tıklatın. </li></ol> 6. Çizelge Hesaplama <ol><li> Excel sayfası içine verileri girin ve bir başlangıç ​​olarak SAL grubundaki parçacıkların sayıları ortalama. Her bölümün yüzde düzeyini hesaplamak ve bir grafik buna göre (Şekil 4) yapmak. </li></ol>

<ol>
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R. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Antigen+retrieval+techniques:+current+perspectives.">Antigen retrieval techniques: current perspectives.</a> J Histochem Cytoche. 49, 931-937 (2001).</li><li>Qin, Y., Heine, V. M., Karst, H., Lucassen, P. J., Joels, M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Gene+expression+patterns+in+rat+dentate+granule+cells:+comparison+between+fresh+and+fixed+tissue.">Gene expression patterns in rat dentate granule cells: comparison between fresh and fixed tissue.</a> J Neurosci Method. 131, 205-211 (2003).</li><li>Carter, B. S., Fletcher, J. S., Thompson, R. 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Potential relevance for atypical antipsychotic action.</a> Neuropharmacolog. 79, 49-58 (2014).</li><li>Reneman, L., 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=The+acute+and+chronic+effects+of+MDMA+('Ecstasy')+on+cortical+5-HT2A+receptors+in+rat+and+human.">The acute and chronic effects of MDMA ('Ecstasy') on cortical 5-HT2A receptors in rat and human.</a> 26, 387-396 (2002).</li></ol>

Yazarlar hiçbir rakip mali çıkarlarını var olduğunu beyan ederiz.

One of the major concerns of in situ hybridization test is to choose appropriate techniques used for RNA preservation because of RNase enzymes. It is well known that these enzymes are widely present in the cells and environment which can affect the results. However, enzyme activity can be quickly distinguished by placing the tissue in the dry ice/alcohol solution5,12. Although quick preservation is critical for hybridization using a riboprobe13, little is known about experimental conditions...

Serotonin (5-hydroxytryptamine; 5-HT) syndrome is an acute neurologic disorder caused by 5-HT-promoting drugs such as antidepressants1, while also occurring in situations of MDMA use for recreational purposes2. Molecular mechanisms responsible for mood swings, learning and memory deficits that occur in association with the acute syndrome are not well understood3,4. In situ hybridization is a powerful research tool allowing the detection and quantification of specific mRNAs expressed potentially at a single-cell level. The conventional way to perform in situ hybridization is to utilize a radioactive-labeled riboprobe that specifically hybridizes the gene of interest. However, a major drawback is that the method requires complicated and time-consuming probe preparation and hybridization steps, as well as access to fresh frozen tissues maintained in an RNase-free environment5,6. 
Oligonucleotide probes have been recently developed to hybridize shorter RNA fragments than those required for riboprobes7. Furthermore, the probes produce a low background signal without sacrificing specificity8. This newly-developed probe technology can be used in situ hybridization on paraformaldehyde-prefixed brain tissues commonly available in immunocytochemical laboratories.
Here, we describe a protocol for in situ hybridization using oligonucleotide probes on paraformaldehyde-prefixed rat brain and compare findings with those noted in a fresh frozen brain5,6. This protocol is used to test the hypothesis that MDMA substance abuse causes changes in 5-HT2A receptor gene htr2a mRNA in the brain. We began the procedure with MDMA treatment followed by paraformaldehyde tissue perfusion of the animal, in situ hybridization of the thr2a probe, and data analysis. Note that dapB (the bacterial gene coding for dihydrodipicolinate reductase) is used as a negative control, and ppiB (housekeeping gene coding for peptidylprolyl isomerase B) as a positive control.

<table border="0" cellpadding="0" cellspacing="0" width="873">
	<tbody>
		<tr>
			<td>RNAscope Negative Control Probe-DapB</td>
			<td>Advanced cell diagnostic, INC</td>
			<td>310098</td>
			<td></td>
		</tr>
		<tr>
			<td>RNAscope Pretreat 4</td>
			<td>Advanced cell diagnostic, INC</td>
			<td>320046</td>
			<td></td>
		</tr>
		<tr>
			<td>RNAscope 2.0 HD Reagent Kit - Red</td>
			<td>Advanced cell diagnostic, INC</td>
			<td>310036</td>
			<td></td>
		</tr>
		<tr>
			<td>RNAscope Probe - Rn-Ppib</td>
			<td>Advanced cell diagnostic, INC</td>
			<td>313921</td>
			<td></td>
		</tr>
		<tr>
			<td>Rat Htr2a</td>
			<td>Advanced cell diagnostic, INC</td>
			<td>300031</td>
			<td></td>
		</tr>
		<tr>
			<td>Cryostat</td>
			<td>Leica</td>
			<td>CM 1850</td>
			<td></td>
		</tr>
		<tr>
			<td>Horizontal shaker</td>
			<td>VWR</td>
			<td>88032-088</td>
			<td></td>
		</tr>
		<tr>
			<td>Hybridization oven</td>
			<td>Thermo Fisher Scientific</td>
			<td>222000</td>
			<td></td>
		</tr>
		<tr>
			<td>Superfrost Plus microscope slide</td>
			<td>Fisher Scientific</td>
			<td>12-550-15</td>
			<td></td>
		</tr>
		<tr>
			<td>Hydrophobic pen</td>
			<td>Vector</td>
			<td>H-4000</td>
			<td></td>
		</tr>
		<tr>
			<td>Microscope</td>
			<td>Olympus</td>
			<td>Provis AX70</td>
			<td></td>
		</tr>
	</tbody>
</table>

rapid in situ hybridization using oligonucleotide probes on paraformaldehyde-prefixed brain of rats with serotonin syndrome

3,4-Methylenedioxymethamphetamine (MDMA; ecstasy) toxicity may cause region-specific changes in serotonergic mRNA expression due to acute serotonin (5-hydroxytryptamine; 5-HT) syndrome. This hypothesis can be tested using in situ hybridization to detect the serotonin 5-HT2A receptor gene htr2a. In the past, such procedures, utilizing radioactive riboprobe, were difficult because of the complicated workflow that needs several days to perform and the added difficulty that the technique required the use of fresh frozen tissues maintained in an RNase-free environment. Recently, the development of short oligonucleotide probes has simplified in situ hybridization procedures and allowed the use of paraformaldehyde-prefixed brain sections, which are more widely available in laboratories. Here, we describe a detailed protocol using non-radioactive oligonucleotide probes on the prefixed brain tissues. Hybridization probes used for this study include dapB (a bacterial gene coding for dihydrodipicolinate reductase), ppiB (a housekeeping gene coding for peptidylprolyl isomerase B), and htr2a (a serotonin gene coding for 5-HT2A receptors). This method is relatively simply, cheap, reproducible and requires less than two days to complete.

Oligonükleotid RNA sondaları (&lt;25 nt) kullanılarak, hibridizasyon paraformaldehit önekli ve taze dondurulmuş beyinlerinden hazırlanan hipotalamik hücrelerde kırmızı noktalar halinde tespit edilebilir. Htr2a mRNA molekülleri (bir katı oklar ile gösterilmektedir), bazı hücrelerde mevcut olan, ancak diğerleri (açık oklar) görülmektedir. Biz paraformaldehıt-öneki ve taze donmuş dokular (Şekil 1) arasında hiçbir fark olmadığını gözlemledik. Başarılı bir melezleş...

Watch this Scientific Journal Video about Rapid In Situ Hybridization using Oligonucleotide Probes on Paraformaldehyde-prefixed Brain of Rats with Serotonin Syndrome at JoVE.com

Rapid In Situ Hybridization using Oligonucleotide Probes on Paraformaldehyde-prefixed Brain of Rats with Serotonin Syndrome

This protocol describes a rapid and simplified in situ hybridization method ideal forparaformaldehyde-prefixed brain, thus reducing the need for prolonged complex steps while using fresh frozen tissues. The method is validated using the identification of the serotonin 5-HT2A receptor gene htr2a in rats.

Çabuk<em&gt; In Situ</emSerotonin Sendromu ile Ratlarda Paraformaldehyde-öneki Beyin oligonükleotid Problar kullanarak&gt; Melezleme

3,4-Methylenedioxymethamphetamine (MDMA; ecstasy) toxicity may cause region-specific changes in serotonergic mRNA expression due to acute serotonin ...

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Neuroscience

Rapid In Situ Hybridization using Oligonucleotide Probes on Paraformaldehyde-prefixed Brain of Rats with Serotonin Syndrome

8.8K Görüntüleme.  Ross University School of Veterinary Medicine. This protocol describes a rapid and simplified in situ hybridization method ideal forparaformaldehyde-prefixed brain, thus reducing the need for prolonged complex steps while using fresh frozen tissues. The method is validated using the identification of the serotonin 5-HT2A receptor gene htr2a in rats.

Video: Rapid In Situ Hybridization using Oligonucleotide Probes on Paraformaldehyde-prefixed Brain of Rats with Serotonin Syndrome

Double Fluorescence in situ Hybridization in Fresh Brain Sections

Here we describe a modified version of a double fluorescence in situ hybridization (dFISH) method optimized for detecting two mRNAs of interest in fresh frozen brain sections. Our group has successfully used this approach to study gene co-regulation. More specifically, we have used this dFISH method to explore the anatomical organization, neurochemical properties, and the impact of sensory experience in central sensory circuits, at single cell resolution. This protocol has been validated in brain tissue from mice, rats and songbirds but is expected to be easily adaptable to other vertebrate species, as well as to an array of non-neural tissues. In this film we provide a detailed demonstration of the main steps of this procedure.

Double Fluorescence in situ Hybridization in Fresh Brain Sections

This protocol involves a non-radioactive in-situ hybridization procedure that enables the simultaneous identification of two transcript species, at a single cell resolution, in thin sections of the vertebrate brain.

Çift Floresans In situ Taze Beyin Bölüm Hibridizasyon

Here we describe a modified version of a double fluorescence in situ hybridization (dFISH) method optimized for detecting two mRNAs of interest in fresh ...

Nörobilim

TMS: Using the Theta-Burst Protocol to Explore Mechanism of Plasticity in Individuals with Fragile X Syndrome and Autism

Fragile X Syndrome (FXS), also known as Martin-Bell Syndrome, is a genetic abnormality found on the X chromosome.1,2 Individuals suffering from FXS display abnormalities in the expression of FMR1 - a protein required for typical, healthy neural development.3 Recent data has suggested that the loss of this protein can cause the cortex to be hyperexcitable thereby affecting overall patterns of neural plasticity.4,5
In addition, Fragile X shows a strong comorbidity with autism: in fact, 30% of children with FXS are diagnosed with autism, and 2 - 5% of autistic children suffer from FXS.6
Transcranial Magnetic Stimulation (a non-invasive neurostimulatory and neuromodulatory technique that can transiently or lastingly modulate cortical excitability via the application of localized magnetic field pulses 7,8) represents a unique method of exploring plasticity and the manifestations of FXS within affected individuals. More specifically, Theta-Burst Stimulation (TBS), a specific stimulatory protocol shown to modulate cortical plasticity for a duration up to 30 minutes after stimulation cessation in healthy populations, has already proven an efficacious tool in the exploration of abnormal plasticity.9,10 
Recent studies have shown the effects of TBS last considerably longer in individuals on the autistic spectrum - up to 90 minutes.11 This extended effect-duration suggests an underlying abnormality in the brain's natural plasticity state in autistic individuals - similar to the hyperexcitability induced by Fragile X Syndrome.
In this experiment, utilizing single-pulse motor-evoked potentials (MEPs) as our benchmark, we will explore the effects of both intermittent and continuous TBS on cortical plasticity in individuals suffering from FXS and individuals on the Autistic Spectrum.

In this article, we examine the effects of Theta-Burst TMS stimulation on cortical plasticity in individuals suffering from Fragile X syndrome and individuals on the autistic spectrum.

TMS: Fragile X Sendromu ve Otizm Bireylerde Plastisite, Mechasnism keşfedin Theta-Burst Protokolü kullanma

Fragile X Syndrome (FXS), also known as Martin-Bell Syndrome, is a genetic abnormality found on the X chromosome.1,2 Individuals suffering from FXS ...

Combining Lipophilic dye, in situ Hybridization, Immunohistochemistry, and Histology

Going beyond single gene function to cut deeper into gene regulatory networks requires multiple mutations combined in a single animal. Such analysis of two or more genes needs to be complemented with in situ hybridization of other genes, or immunohistochemistry of their proteins, both in whole mounted developing organs or sections for detailed resolution of the cellular and tissue expression alterations. Combining multiple gene alterations requires the use of cre or flipase to conditionally delete genes and avoid embryonic lethality. Required breeding schemes dramatically enhance effort and cost proportional to the number of genes mutated, with an outcome of very few animals with the full repertoire of genetic modifications desired. Amortizing the vast amount of effort and time to obtain these few precious specimens that are carrying multiple mutations necessitates tissue optimization. Moreover, investigating a single animal with multiple techniques makes it easier to correlate gene deletion defects with expression profiles. We have developed a technique to obtain a more thorough analysis of a given animal; with the ability to analyze several different histologically recognizable structures as well as gene and protein expression all from the same specimen in both whole mounted organs and sections. Although mice have been utilized to demonstrate the effectiveness of this technique it can be applied to a wide array of animals. To do this we combine lipophilic dye tracing, whole mount in situ hybridization, immunohistochemistry, and histology to extract the maximal possible amount of data.

Combining Lipophilic dye, in situ Hybridization, Immunohistochemistry, and Histology

A combination of different techniques to maximize data collection from mouse tissue is presented.

Lipofilik boya birleştiren In situ Hibridizasyon, İmmünohistokimya ve Histoloji

Going beyond single gene function to cut deeper into gene regulatory networks requires multiple mutations combined in a single animal.  Such analysis of ...

Complete Spinal Cord Injury and Brain Dissection Protocol for Subsequent Wholemount In Situ Hybridization in Larval Sea Lamprey

After a complete spinal cord injury, sea lampreys at first are paralyzed below the level of transection. However, they recover locomotion after several weeks, and this is accompanied by short distance regeneration (a few mm) of propriospinal axons and spinal-projecting axons from the brainstem. Among the 36 large identifiable spinal-projecting neurons, some are good regenerators and others are bad regenerators. These neurons can most easily be identified in wholemount CNS preparations. In order to understand the neuron-intrinsic mechanisms that favor or inhibit axon regeneration after injury in the vertebrates CNS, we determine differences in gene expression between the good and bad regenerators, and how expression is influenced by spinal cord transection. This paper illustrates the techniques for housing larval and recently transformed adult sea lampreys in fresh water tanks, producing complete spinal cord transections under microscopic vision, and preparing brain and spinal cord wholemounts for in situ hybridization. Briefly, animals are kept at 16&#160;&#176;C and anesthetized in 1% Benzocaine in lamprey Ringer. The spinal cord is transected with iridectomy scissors via a dorsal approach and the animal is allowed to recover in fresh water tanks at 23 &#176;C. For in situ hybridization, animals are reanesthetized and the brain and cord removed via a dorsal approach.

Complete Spinal Cord Injury and Brain Dissection Protocol for Subsequent Wholemount In Situ Hybridization in Larval Sea Lamprey

Lampreys recover locomotion after a complete spinal cord injury. However, some spinal-projecting neurons are good regenerators and others are not. This paper illustrates the techniques for housing sea lamprey larvae (and recently transformed adults), producing complete spinal cord transections and preparing wholemount brains and spinal cords for in situ hybridization.

Sonradan wholemount için komple Omurilik Yaralanmalı ve Beyin Diseksiyon Protokolü<em&gt; Yerinde</em&gt; Larva Deniz taşemen içinde Hibritleşme

After a complete spinal cord injury, sea lampreys at first are paralyzed below the level of transection. However, they recover locomotion after several ...

Detection of Axonally Localized mRNAs in Brain Sections Using High-Resolution In Situ Hybridization

mRNAs are frequently localized to vertebrate axons and their local translation is required for axon pathfinding or branching during development and for maintenance, repair or neurodegeneration in postdevelopmental periods. High throughput analyses have recently revealed that axons have a more dynamic and complex transcriptome than previously expected. These analysis, however have been mostly done in cultured neurons where axons can be isolated from the somato-dendritic compartments. It is virtually impossible to achieve such isolation in whole tissues in vivo. Thus, in order to verify the recruitment of mRNAs and their functional relevance in a whole animal, transcriptome analyses should ideally be combined with techniques that allow the visualization of mRNAs in situ. Recently, novel ISH technologies that detect RNAs at a single-molecule level have been developed. This is especially important when analyzing the subcellular localization of mRNA, since localized RNAs are typically found at low levels. Here we describe two protocols for the detection of axonally-localized mRNAs using a novel ultrasensitive RNA ISH technology. We have combined RNAscope ISH with axonal counterstain using fluorescence immunohistochemistry or histological dyes to verify the recruitment of Atf4 mRNA to axons in vivo in the mature mouse and human brains.

Detection of Axonally Localized mRNAs in Brain Sections Using High-Resolution In Situ Hybridization

RNA in situ hybridization (ISH) enables the visualization of RNAs in cells and tissues. Here we show how combination of RNAscope ISH with immunohistochemistry or histological dyes can be successfully used to detect mRNAs localized to axons in sections of mouse and human brains.

Yüksek Çözünürlük kullanma Beyin bölümlerde Axonally Lokalize mRNA&#39;larının Algılama<em&gt; In Situ</em&gt; Melezleme

mRNAs are frequently localized to vertebrate axons and their local translation is required for axon pathfinding or branching during development and for ...

Combining Double Fluorescence In Situ Hybridization with Immunolabelling for Detection of the Expression of Three Genes in Mouse Brain Sections

Detection of gene expression in different types of brain cells e.g., neurons, astrocytes, oligodendrocytes, oligodendrocyte precursors and microglia, can be hampered by the lack of specific primary or secondary antibodies for immunostaining. Here we describe a protocol to detect the expression of three different genes in the same brain section using double fluorescence in situ hybridization with two gene-specific probes followed by immunostaining with an antibody of high specificity directed against the protein encoded by a third gene. The Aspartoacyclase (ASPA) gene, mutations of which can lead to a rare human white matter disease - Canavan disease - is thought to be expressed in oligodendrocytes and microglia but not in astrocytes and neurons. However, the precise expression pattern of ASPA in the brain has yet to be established. This protocol has allowed us to determine that ASPA is expressed in a subset of mature oligodendrocytes and it can be generally applied to a wide range of gene expression pattern studies.

Combining Double Fluorescence In Situ Hybridization with Immunolabelling for Detection of the Expression of Three Genes in Mouse Brain Sections

Localizing gene expression to specific cell types can be challenging due to the lack of specific antibodies. Here we describe a protocol for simultaneous triple detection of gene expression by combining double fluorescence RNA in situ hybridization with immunostaining.

Çift Floresan birleştiren<em&gt; In Situ</em&gt; Fare Beyin Bölüm Üç Genlerin İfade tespiti için immünoişaretleme ile Hibridizasyon

Detection of gene expression in different types of brain cells e.g., neurons, astrocytes, oligodendrocytes, oligodendrocyte precursors and microglia, can ...

Quantification of Endosome and Lysosome Motilities in Cultured Neurons Using Fluorescent Probes

In the brain, membrane trafficking systems play important roles in regulating neuronal functions, such as neuronal morphology, synaptic plasticity, survival, and glial communications. To date, numerous studies have reported that defects in these systems cause various neuronal diseases. Thus, understanding the mechanisms underlying vesicle dynamics may provide influential clues that could aid in the treatment of several neuronal disorders. Here, we describe a method for quantifying vesicle motilities, such as motility distance and rate of movement, using a software plug-in for the ImageJ platform. To obtain images for quantification, we labeled neuronal endosome-lysosome structures with EGFP-tagged vesicle marker proteins and observed the movement of vesicles using a time-lapse microscopy. This method is highly useful and simplify measuring vesicle motility in neurites, such as axons and dendrites, as well as in the soma of both neurons and glial cells. Furthermore, this method can be applied to other cell lines, such as fibroblasts and endothelial cells. This approach could provide a valuable advancement of our understanding of membrane trafficking.

The investigation of membrane trafficking is crucial for understanding neuronal functions. Here, we introduce a method for quantifying vesicle motility in neurons. This is a convenient method that can be adapted to the quantification of membrane trafficking in the nervous system.

Floresan Probları Kullanan Kültürlü Nöronlarda Endozom ve Lizozom Hareketlerinin Nicelendirilmesi

In the brain, membrane trafficking systems play important roles in regulating neuronal functions, such as neuronal morphology, synaptic plasticity, ...

Localization of Odorant Receptor Genes in Locust Antennae by RNA In Situ Hybridization

Insects have evolved sophisticated olfactory reception systems to sense exogenous chemical signals. These chemical signals are transduced by Olfactory Receptor Neurons (ORNs) housed in hair-like structures, called chemosensilla, of the antennae. On the ORNs&#39; membranes, Odorant Receptors (ORs) are believed to be involved in odor coding. Thus, being able to identify genes localized to the ORNs is necessary to recognize OR genes, and provides a fundamental basis for further functional in situ studies. The RNA expression levels of specific ORs in insect antennae are very low, and preserving insect tissue for histology is challenging. Thus, it is difficult to localize an OR to a specific type of sensilla using RNA in situ hybridization. In this paper, a detailed and highly effective RNA in situ hybridization protocol particularly for lowly expressed OR genes of insects, is introduced. In addition, a specific OR gene was identified by conducting double-color fluorescent in situ hybridization experiments using a co-expressing receptor gene, Orco, as a marker.

Localization of Odorant Receptor Genes in Locust Antennae by RNA In Situ Hybridization

This paper describes a detailed and highly effective RNA in situ hybridization protocol particularly for low-level expressed Odorant Receptor (OR) genes, as well as other genes, in insect antennae using digoxigenin (DIG)-labeled or biotin-labeled probes.

Locust Antenlerinde Odorant Reseptör Genlerinin RNA ile Lokalizasyonu<em&gt; Yerinde</em&gt; Hibridizasyon

Insects have evolved sophisticated olfactory reception systems to sense exogenous chemical signals. These chemical signals are transduced by Olfactory ...

Induction of Diffuse Axonal Brain Injury in Rats Based on Rotational Acceleration

Traumatic brain injury (TBI) is a major cause of death and disability. Diffuse axonal injury (DAI) is the predominant mechanism of injury in a large percentage of TBI patients requiring hospitalization. DAI involves widespread axonal damage from shaking, rotation or blast injury, leading to rapid axonal stretch injury and secondary axonal changes that are associated with a long-lasting impact on functional recovery. Historically, experimental models of DAI without focal injury have been difficult to design. Here we validate a simple, reproducible and reliable rodent model of DAI that causes widespread white matter damage without skull fractures or contusions.

This protocol validates a reliable, easy-to-perform and reproducible rodent model of brain diffuse axonal injury (DAI) that induces widespread white matter damage without skull fractures or contusions.

Rotasyonel İvmeye Dayalı Sıçanlarda Diffüz Aksonal Beyin Hasarıİn İndüksiyonu

Traumatic brain injury (TBI) is a major cause of death and disability. Diffuse axonal injury (DAI) is the predominant mechanism of injury in a large ...

Combining Multiplex Fluorescence In Situ Hybridization with Fluorescent Immunohistochemistry on Fresh Frozen or Fixed Mouse Brain Sections

Fluorescent in situ hybridization (FISH) is a molecular technique that identifies the presence and spatial distribution of specific RNA transcripts within cells. Neurochemical phenotyping of functionally identified neurons usually requires concurrent labelling with multiple antibodies (targeting protein) using immunohistochemistry (IHC) and optimization of in situ hybridization (targeting RNA), in tandem. A &#34;neurochemical signature&#34; to characterize particular neurons may be achieved however complicating factors include the need to verify FISH and IHC targets before combining the methods, and the limited number of RNAs and proteins that may be targeted simultaneously within the same tissue section.
Here we describe a protocol, using both fresh frozen and fixed mouse brain preparations, which detects multiple mRNAs and proteins in the same brain section using RNAscope FISH followed by fluorescence immunostaining, respectively. We use the combined method to describe the expression pattern of low abundance mRNAs (e.g., galanin receptor 1) and high abundance mRNAs (e.g., glycine transporter 2), in immunohistochemically identified brainstem nuclei.
Key considerations for protein labelling downstream of the FISH assay extend beyond tissue preparation and optimization of FISH probe labelling. For example, we found that antibody binding and labelling specificity can be detrimentally affected by the protease step within the FISH probe assay. Proteases catalyze hydrolytic cleavage of peptide bonds, facilitating FISH probe entry into cells, however they may also digest the protein targeted by the subsequent IHC assay, producing off target binding. The subcellular location of the targeted protein is another factor contributing to IHC success following FISH probe assay. We observed IHC specificity to be retained when the targeted protein is membrane bound, whereas IHC targeting cytoplasmic protein required extensive troubleshooting. Finally, we found handling of slide-mounted fixed frozen tissue more challenging than fresh frozen tissue, however IHC quality was overall better with fixed frozen tissue, when combined with RNAscope.

Combining Multiplex Fluorescence In Situ Hybridization with Fluorescent Immunohistochemistry on Fresh Frozen or Fixed Mouse Brain Sections

This protocol describes a method for combining fluorescence in situ hybridization (FISH) and fluorescence immunohistochemistry (IHC) in both fresh frozen and fixed mouse brain sections, with the goal of achieving multilabel FISH and fluorescence IHC signal. IHC targeted cytoplasmic and membrane attached proteins.

Multipleks Floresan In Situ Hibridizasyonun Floresan İmmünohistokimya ile Taze Dondurulmuş veya Sabit Fare Beyin Kesitlerinde Birleştirilmesi

Fluorescent in situ hybridization (FISH) is a molecular technique that identifies the presence and spatial distribution of specific RNA transcripts within ...