Abstract:
PURPOSE:Imbalances between osteogenic and adipogenic differentiation leads to diseases such as osteoporosis. The aim of our study was to demonstrate the differences in extracellular signal-regulated kinase (ERK) phosphorylation during both adipogenesis and osteogenesis of human bone marrow-derived stem cells (BMSCs). MATERIALS AND METHODS:Using troglitazone, GW9662 and U0126, we investigated their role in hBMSC differentiation to adipogenic and osteogenic fates. RESULTS:ERK1/2 inhibition by U0126 suppressed proliferator-activated receptor (PPAR)γ expression and lipid accumulation, while it decreased the mRNA expression of adipogenic genes (lipoprotein lipase, PPARγ, and adipocyte protein) and osteogenic genes (type I collagen and osteopontin). ERK phosphorylation was transient and decreased during adipogenesis, whereas it occurred steadily during osteogenesis. Troglitazone, a PPARγ agonist, induced adipogenesis by inhibiting ERK phosphorylation even in an osteogenic medium, suggesting that ERK signaling needs to be shut off in order to proceed with adipose cell commitment. Cell proliferation was greatly increased in osteogenesis but was not changed during adipogenesis, indicating that ERK might play different roles in cellular proliferation and differentiation between the two committed cell types. CONCLUSION:The duration and magnitude of ERK activation might be a crucial factor for the balance between adipogenesis and osteogenesis in human bone marrow-derived stem cells.
journal_name
Yonsei Med Jjournal_title
Yonsei medical journalauthors
Jung HS,Kim YH,Lee JWdoi
10.3349/ymj.2011.52.1.165subject
Has Abstractpub_date
2011-01-01 00:00:00pages
165-72issue
1eissn
0513-5796issn
1976-2437pii
201101165journal_volume
52pub_type
杂志文章abstract:PURPOSE:Physicians and oncology nurses must continue to update their knowledge on treatment and treatment-related side effects, while searching for effective methods to prevent or manage side effects. The objective of our study was to describe the incidence and response to treatment of the hand-foot syndrome (HFS) and ...
journal_title:Yonsei medical journal
pub_type: 杂志文章
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journal_title:Yonsei medical journal
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pub_type: 临床试验,杂志文章
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journal_title:Yonsei medical journal
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