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Rescuing replication and osteogenesis of aged mesenchymal stem cells by exposure to a young extracellular matrix
Author(s) -
Sun Yun,
Li Weiping,
Lu Zhengding,
Chen Richard,
Ling Jian,
Ran Qitao,
Jilka Robert L.,
Chen Xiao-Dong
Publication year - 2011
Publication title -
the faseb journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.709
H-Index - 277
eISSN - 1530-6860
pISSN - 0892-6638
DOI - 10.1096/fj.10-161497
Subject(s) - extracellular matrix , mesenchymal stem cell , microbiology and biotechnology , bone marrow , matrix (chemical analysis) , chemistry , immunology , biology , chromatography
This study aimed to determine whether aging negatively affects MSC replication and osteogen‐esis and whether these features could be altered by exposure to an extracellular matrix (ECM) generated by marrow cells from young or old mice. A cell‐free ECM was prepared from cultured femoral marrow cells from either 3‐ or 18‐mo‐old C57BL/6 mice (young‐ECM or old‐ECM, respectively). The replication and osteo‐genesis of young or old MSCs maintained on young‐ECM vs. old‐ECM as well as plastic were examined in vitro and in vivo. We found that the frequency of MSCs in marrow from old mice, measured by colony‐forming cells, was only marginally lower than that of young mice. In contrast, defects in the self‐renewal and bone formation capacity of old MSCs were remarkable. These defects were corrected by provision of a young‐ECM but not old‐ECM. In parallel cultures maintained on a young‐ECM, the intracellular levels of reactive oxygen species from both old and young mice were reduced 30–50% compared to those maintained on old‐ECM or plastic. We concluded that aging negatively affects the formation of an ECM that normally preserves MSC function, and aged MSCs can be rejuvenated by culture on a young‐ECM.—Sun, Y., Li, W., Lu, Z., Chen, Z., Ling, J., Ran, O., Jilka, R. L., Chen, X. D. Rescuing replication and osteogenesis of aged mesenchymal stem cells by exposure to a young extracellular matrix. FASEB J. 25, 1474–1485 (2011). www.fasebj.org