Antioxidant levels represent a major determinant in the regenerative capacity of muscle stem cells.

Abstract:

:Stem cells are classically defined by their multipotent, long-term proliferation, and self-renewal capabilities. Here, we show that increased antioxidant capacity represents an additional functional characteristic of muscle-derived stem cells (MDSCs). Seeking to understand the superior regenerative capacity of MDSCs compared with myoblasts in cardiac and skeletal muscle transplantation, our group hypothesized that survival of the oxidative and inflammatory stress inherent to transplantation may play an important role. Evidence of increased enzymatic and nonenzymatic antioxidant capacity of MDSCs were observed in terms of higher levels of superoxide dismutase and glutathione, which appears to confer a differentiation and survival advantage. Further when glutathione levels of the MDSCs are lowered to that of myoblasts, the transplantation advantage of MDSCs over myoblasts is lost when transplanted into both skeletal and cardiac muscles. These findings elucidate an important cause for the superior regenerative capacity of MDSCs, and provide functional evidence for the emerging role of antioxidant capacity as a critical property for MDSC survival post-transplantation.

journal_name

Mol Biol Cell

authors

Urish KL,Vella JB,Okada M,Deasy BM,Tobita K,Keller BB,Cao B,Piganelli JD,Huard J

doi

10.1091/mbc.e08-03-0274

subject

Has Abstract

pub_date

2009-01-01 00:00:00

pages

509-20

issue

1

eissn

1059-1524

issn

1939-4586

pii

E08-03-0274

journal_volume

20

pub_type

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