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Effect of muscle origin and phenotype on satellite cell muscle-specific gene expression.

Abstract：

:Satellite cells from adult mouse tongue, diaphragm, vastus lateralis, rectus femoris, tibialis anterior, soleus, and extensor digitorum longus muscles were isolated, expanded, and differentiated under identical culture conditions. Proliferating myoblasts and differentiated myofiber cultures were analyzed via SDS-PAGE, immunochemical, and PCR methods for expression of myosin heavy chains (MyHC) and muscle creatine kinase (MCK) as indices of muscle fiber type. Contralateral muscles were harvested for simultaneous, parallel analysis utilizing these assays. The MyHC profile of differentiated primary satellite cells was equivalent across all cultures with MyHC(2A) and MyHC(1/slow) co-expressed in all myotube and myofiber structures. Trace amounts of MyHC(2B) and MyHC(neo) were detected in a few myofibers. MCK was expressed at a uniform, similar level among these cultures. In contrast, contralateral muscles expressed each muscle-specific indicator at levels correlated with the fiber-type distribution within each muscle. MM14 and C2C12 cells, mouse satellite cell lines, were expanded and compared to primary cell cultures. MM14 cells had a high differentiation index (>95%) and co-expressed MyHC(2A) and MyHC(1/slow) along with trace amounts of MyHC(neo) throughout myotube cultures. Myofibers obtained from C2C12 cells exhibited less differentiation (~75%) with MyHC(2A) as the dominant isoform. These data indicate that primary satellite cells from adult muscle form a uniform differentiated cell type regardless of the fiber-type, anatomic location, and embryonic origin of the donor muscles. MM14 cells expressed an adult MyHC isoform profile similar to primary satellite cells. The results suggest that satellite cells provide a uniform cell source for use in autologous transplantation studies and do not acquire a heritable fiber-type-specific phenotype from their host muscle.

journal_name

J Mol Cell Cardiol

journal_title

Journal of molecular and cellular cardiology

authors

LaFramboise WA,Guthrie RD,Scalise D,Elborne V,Bombach KL,Armanious CS,Magovern JA

doi

10.1016/s0022-2828(03)00245-1

keywords:

subject

Has Abstract

pub_date

2003-10-01 00:00:00

pages

1307-18

issue

eissn

0022-2828

issn

1095-8584

pii

S0022282803002451

journal_volume

pub_type

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Effect of muscle origin and phenotype on satellite cell muscle-specific gene expression.