Name: analysis of embryonic and larval zebrafish skeletal myofibers from dissociated preparations
Uploaded: 2013-11-13T19:30:00
Description: Watch this Scientific Journal Video about Analysis of Embryonic and Larval Zebrafish Skeletal Myofibers from Dissociated Preparations at JoVE.com

Gli autori desiderano ringraziare i membri del laboratorio Dowling (Aaron Reifler, Trent Waugh, Angela Busta, e William Telfer), che hanno contribuito allo sviluppo della tecnica e alla produzione del manoscritto. Questo lavoro è stato finanziato dall&#39;Istituto Taubman, il Dipartimento di Pediatria presso l&#39;Università del Michigan, e in parte da sovvenzioni dal Distrofia Muscolare (JJD MDA186999) e il National Institutes of Health (JJD 1K08AR054835).

1. Preparazione del Poli-L-lisina Rivestito Coprivetrini (Tempo: 1 ora) Lamelle di rivestimento consente una rapida decantazione myofiber e l&#39;adesione. Ciò può essere eseguita durante la fase di dissociazione dell&#39;isolamento miofibre (passo 2). <ol><li> Tagliare e posizionare Parafilm sul fondo di un piatto 60 millimetri Petri (di qualsiasi marca). </li><li> Posizionare scivola vetro di copertura microscopio (diametro 12 mm) su parafilm in un piatto di coltura tissutale a 60 mm o...

<ol>
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I., Zon, <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Overview+of+the+Zebrafish+system.">Overview of the Zebrafish system.</a> Methods Cell Biol. 59, 3-10 (1999).</li><li>Nixon, S. J., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Zebrafish+as+a+model+for+caveolin-associated+muscle+disease;+caveolin-3+is+required+for+myofibril+organization+and+muscle+cell+patterning.">Zebrafish as a model for caveolin-associated muscle disease; caveolin-3 is required for myofibril organization and muscle cell patterning.</a> Hum. Mol. 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L. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Zebrafish+MTMR14+is+required+for+excitation-contraction+coupling,+developmental+motor+function+and+the+regulation+of+autophagy.">Zebrafish MTMR14 is required for excitation-contraction coupling, developmental motor function and the regulation of autophagy.</a> Hum. Mol. 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Zebrafish sono un potente sistema modello vertebrato per studiare lo sviluppo muscolare e la funzione in vivo 25,27,28. Essi hanno anche emerso come un bene prezioso per la modellazione di malattie muscolari umane 14,15,20,29. Mentre i grandi passi avanti sono stati compiuti per promuovere l&#39;uso e l&#39;applicazione di zebrafish per lo studio della funzione muscolare e delle malattie del muscolo, vi è una necessità critica costante per sviluppare strumenti che consentano più approfo...

Il muscolo scheletrico è un tessuto altamente specializzato responsabile della generazione delle forze necessarie motilità contrattili. La contrazione è iniziata attraverso un processo noto come eccitazione-contrazione (EC) di accoppiamento che converte i segnali elettrici di rilascio di calcio dai depositi intracellulari 1,2. Rilascio di calcio intracellulare attiva il sarcomero di accorciare e generare forza. I numerosi componenti specifici della macchina molecolare responsabile mediare la trasmissione neuromuscolare svincolo 3, accoppiamento EC 4,5, e actina-miosina contrazioni dipendenti 6 continuano ad essere oggetto continuo di intensa ricerca. Inoltre, le proteine ​​che stabilizzano la membrana del muscolo durante la contrazione 7,8 e che mediano la segnalazione tra il myofiber e la matrice extracellulare 7,9 sono stati identificati e studiati nei minimi dettagli. Mutazioni in un certo numero di geni importanti per una struttura muscolarefunzione nd sono stati identificati come causa di malattie del muscolo scheletrici umani ( <a href="http://www.musclegenetable.org/" target="_blank">http://www.musclegenetable.org/</a> ). Queste malattie, classificati in linea di massima come miopatie scheletriche e distrofie muscolari basati su caratteristiche cliniche e istopatologiche, sono associati a debolezza muscolare, invalidità permanente e 10,11 mortalità precoce. Lo zebrafish ha dimostrato di essere un sistema eccezionale per la modellazione e lo studio delle malattie del muscolo scheletrici umani 8,12,13. E &#39;stato impiegato per validare nuove mutazioni del gene 8, definire nuovi aspetti della malattia fisiopatologia 14,15, e identificare nuovi approcci terapeutici 15,16. La potenza della zebrafish per studio delle malattie muscolo umano riferisce al maggior numero di figli, il rapido sviluppo della struttura muscolare e funzione, la chiarezza ottica dell&#39;embrione zebrafish, e la facilità di manipolazione genetica e farmacologica della zebra sviluppopesce 17. Noi e altri 12,18,19 recentemente sviluppato una tecnica semplice per l&#39;isolamento rapido ed efficiente miofibre dal zebrafish sviluppo. Questo metodo ha permesso l&#39;esame di miofibre in maggior dettaglio che può essere fornita da intera analisi embrione. La tecnica è stata sfruttata per la caratterizzazione della proteina localizzazione subcellulare 20 nonché per l&#39;identificazione di importanti caratteristiche istopatologiche come parte di studi di validazione in modelli di malattia di nuova concezione 21. Inoltre, miofibre isolate possono inoltre essere utilizzati per l&#39;imaging dal vivo e per gli studi elettrofisiologici 22, tecniche che consentono l&#39;interrogatorio di aspetti fondamentali della funzione muscolare. Il protocollo specifico per l&#39;isolamento miofibre, insieme a due esempi di esperimenti successivi analitiche, è dettagliata nelle parti rimanenti di questo manoscritto.

<table border="1">
	<tbody>
		<tr>
			<td>Name of the reagent</td>
			<td>Company</td>
			<td>Catalogue number</td>
			<td>Comments (optional)</td>
		</tr>
		<tr>
			<td>24-well culture plate</td>
			<td>Corning</td>
			<td>3524</td>
			<td></td>
		</tr>
		<tr>
			<td>10x PBS</td>
			<td>Invitrogen Gibco</td>
			<td>70011</td>
			<td></td>
		</tr>
		<tr>
			<td>CO2 Independent medium</td>
			<td>Invitrogen Gibco</td>
			<td>18045</td>
			<td></td>
		</tr>
		<tr>
			<td>Collagenase Type II</td>
			<td>Worthington Biochemical</td>
			<td>LS004186</td>
			<td>Lot 41H12764</td>
		</tr>
		<tr>
			<td>Collagenase Type IV</td>
			<td>Worthington Biochemical</td>
			<td>L5004188</td>
			<td></td>
		</tr>
		<tr>
			<td>8% Paraformaldehyde</td>
			<td>Electron Microscopy Sciences</td>
			<td>157-8</td>
			<td></td>
		</tr>
		<tr>
			<td>Methanol</td>
			<td>Sigma</td>
			<td>322415</td>
			<td></td>
		</tr>
		<tr>
			<td>Triton X-100</td>
			<td>Sigma</td>
			<td>X100</td>
			<td></td>
		</tr>
		<tr>
			<td>BSA</td>
			<td>Sigma</td>
			<td>A2153</td>
			<td></td>
		</tr>
		<tr>
			<td>Sheep serum</td>
			<td>Sigma</td>
			<td>S3772</td>
			<td></td>
		</tr>
		<tr>
			<td>Goat serum</td>
			<td>Sigma</td>
			<td>G9023</td>
			<td></td>
		</tr>
		<tr>
			<td>Glass coverslips</td>
			<td>Fischerbrand</td>
			<td>12-545-82 12CIR-1D</td>
			<td></td>
		</tr>
		<tr>
			<td>Poly-L-Lysine</td>
			<td>Sigma</td>
			<td>P4707</td>
			<td></td>
		</tr>
		<tr>
			<td>Pronase</td>
			<td>Sigma</td>
			<td>P5147</td>
			<td></td>
		</tr>
		<tr>
			<td>40 &#956;m Filter</td>
			<td>BD Biosciences</td>
			<td>352340</td>
			<td></td>
		</tr>
		<tr>
			<td>70 &#956;m Filter</td>
			<td>BD Biosciences</td>
			<td>352350</td>
			<td></td>
		</tr>
		<tr>
			<td>Prolong Gold antifade reagent</td>
			<td>Invitrogen</td>
			<td>P36931</td>
			<td></td>
		</tr>
		<tr>
			<td>Anti-&#945;-Actinin antibody</td>
			<td>Sigma</td>
			<td>A5044</td>
			<td></td>
		</tr>
		<tr>
			<td>Anti-RYR antibody</td>
			<td>Abcam</td>
			<td>34C</td>
			<td></td>
		</tr>
		<tr>
			<td>Alexa Fluor antibody</td>
			<td>Invitrogen</td>
			<td>A-21425</td>
			<td></td>
		</tr>
		<tr>
			<td>TWEEN 20</td>
			<td>Sigma</td>
			<td>P1379</td>
			<td></td>
		</tr>
		<tr>
			<td>60 mm Petri dish</td>
			<td>Fischerbrand</td>
			<td>0875713A</td>
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analysis of embryonic and larval zebrafish skeletal myofibers from dissociated preparations

Lo zebrafish ha dimostrato di essere un sistema valido modello per esplorare la funzione del muscolo scheletrico e per lo studio delle malattie muscolari umane. Nonostante i numerosi vantaggi offerti da analisi in vivo del muscolo scheletrico nel zebrafish, visualizzando l&#39;ambiente proteina complesso e finemente strutturato responsabile per la funzione muscolare, soprattutto in embrioni interi, può essere problematico. Questo ostacolo deriva dalla piccola dimensione del muscolo scheletrico zebrafish (60 micron) e le dimensioni ancora più piccolo del sarcomero. Qui descriviamo e dimostrare un metodo semplice e rapido per isolare miofibre scheletriche da embrioni di zebrafish e larve. Abbiamo anche i protocolli che illustrano le tecniche di preparazione post utili per analizzare la struttura e la funzione muscolare. In particolare, abbiamo dettaglio la successiva localizzazione immunocitochimica delle proteine ​​dei muscoli scheletrici e l&#39;analisi qualitativa del rilascio del calcio stimolato via live Calcio Imaging cellulare. Nel complesso, questo videoarticolo fornisce un metodo straight-forward ed efficace per l&#39;isolamento e la caratterizzazione di miofibre scheletriche zebrafish, una tecnica che prevede un condotto per la miriade di successivi studi di struttura e funzione muscolare.

Immunomarcatura fluorescente di miofibre (Figura 2) Immagini che mostrano atteso modello di marcatura fluorescente da myofibers immunostained dopo l&#39;isolamento di successo e placcatura. Le miofibre sono stati etichettati sia con anti-recettore ryanodine (1:100) (Figura 2A) o anti-α-actinina (1:100) (Figura 2B) anticorpi, e rivelare rispettivamente immunocolorazione della triade e la Z-band. Anticorpi secondari utilizzati erano ...

Watch this Scientific Journal Video about Analysis of Embryonic and Larval Zebrafish Skeletal Myofibers from Dissociated Preparations at JoVE.com

Analysis of Embryonic and Larval Zebrafish Skeletal Myofibers from Dissociated Preparations

Zebrafish sono un sistema emergente per modellare disturbi umani del muscolo scheletrico. Descriviamo un metodo veloce ed efficace per isolare miofibre muscolari scheletriche da zebrafish embrionale e larvale. Questo metodo fornisce una preparazione ad alta densità miofibre adatto per lo studio della morfologia singola fibra muscolare scheletrica, proteina localizzazione subcellulare, e fisiologia muscolare.

Analisi delle embrionali e larvali Zebrafish scheletriche miofibre da Preparazioni dissociata

The zebrafish has  proven to be a valuable model system for exploring skeletal muscle function and  for studying human muscle diseases. Despite  the many ...

Research

JoVE Journal

Biology

Primary Dissociated Midbrain Dopamine Cell Cultures from Rodent Neonates

Primaria dissociato mesencefalo colture cellulari dopamina da roditori neonati

The ability to create primary cell cultures of dopamine neurons allows for the study of the presynaptic characteristics of dopamine neurons in isolation ...

Ricerca

Biologia

RNA Isolation from Embryonic Zebrafish and cDNA Synthesis for Gene Expression Analysis

Isolamento RNA da embrionali Sintesi Zebrafish e cDNA per l&#39;analisi di espressione genica

Many important and complex laboratory procedures require an input of high quality, intact RNA.  A degraded sample or the presence of impurities can lead ...

Microdissection of Zebrafish Embryonic Eye Tissues

Microdissezione dei tessuti oculari Zebrafish embrionali

Zebrafish is a popular animal model for research on eye development because of its rapid ex utero development and good fecundity. By 3 days post ...

Adult and Embryonic Skeletal Muscle Microexplant Culture and Isolation of Skeletal Muscle Stem Cells

Adulte e embrionali muscolo scheletrico Microexplant Cultura e isolamento di cellule staminali del muscolo scheletrico

Cultured embryonic and adult skeletal muscle cells have a number of different uses. The micro-dissected explants technique described in this chapter is a ...

Heart Dissection in Larval, Juvenile and Adult Zebrafish, Danio rerio

Heart Dissection in Larval, Juvenile and Adult Zebrafish, Danio rerio

Dissezione di cuore in larvale, Zebrafish giovanile e degli adulti, Danio rerio</em

Zebrafish have become a beneficial and practical model organism for the study of embryonic heart development (see recent reviews1-6), however, work ...

Immunostaining of Dissected Zebrafish Embryonic Heart

Immunocolorazione di Dissected Cuore Zebrafish embrionali

Zebrafish embryo becomes a popular in vivo vertebrate model for studying cardiac development and human heart diseases due to its advantageous embryology ...

Laser-inflicted Injury of Zebrafish Embryonic Skeletal Muscle

Laser-lesioni del muscolo scheletrico embrionale Zebrafish

Various experimental approaches have been used in mouse to induce muscle injury with the aim to study muscle regeneration, including myotoxin injections ...

Isolation and Culture of Individual Myofibers and their Satellite Cells from Adult Skeletal Muscle

Isolamento e la coltura di miofibre individuali e delle loro cellule satelliti da adulto muscolo scheletrico

Muscle  regeneration in the adult is performed by resident stem cells called satellite  cells. Satellite cells are defined by  their position between the ...

Imaging and 3D Reconstruction of Cerebrovascular Structures in Embryonic Zebrafish

Imaging 3D e ricostruzione di strutture cerebrovascolari in Zebrafish embrionali

Zebrafish are a powerful tool to study developmental biology and pathology in vivo.  The small size and relative transparency of zebrafish embryos make ...