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SHR Neuro Krebs Kardio Lipid

Friedl, G; Schmidt, H; Rehak, I; Kostner, G; Schauenstein, K; Windhager, R.
Undifferentiated human mesenchymal stem cells (hMSCs) are highly sensitive to mechanical strain: transcriptionally controlled early osteo-chondrogenic response in vitro.
Osteoarthritis Cartilage. 2007; 15(11): 1293-1300. [OPEN ACCESS]
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Autor/innen der Med Uni Graz:
Friedl Gerald
Kostner Gerhard
Schmidt Helena
Windhager Reinhard
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Abstract:
OBJECTIVE: Physical cues play a crucial role in skeletogenesis and osteochondral regeneration. Although human mesenchymal stem cells (hMSCs) offer considerable therapeutic potential, little is known about the molecular mechanisms that control their differentiation. We hypothesized that mechanical strain might be an inherent stimulus for chondrogenic and/or osteogenic differentiation in undifferentiated hMSCs, where c-Fos (FOS) might play a major role in mechanotransduction. METHOD: hMSCs from 10 donors were intermittently stimulated by cyclic tensile strain (CTS) at 3000 mustrain for a period of 3 days. Differential gene expression of strained and unstrained hMSCs was analysed by real-time RT-PCR for several marker genes, including the transcription factors FOS, RUNX2, SOX9, and others. Additionally, alkaline phosphatase activity (ALP) was determined kinetically. RESULTS: The application of CTS significantly stimulated the expression levels of the early chondrogenic and osteogenic marker genes (SOX9, LUM, DCN; RUNX2, SPARC, SPP1, ALPL); this was accompanied by stimulation of ALP activity (+38%+/-12 standard error of mean, P<0.05). Matrix analysis revealed that the osteo-chondrogenic response followed a coordinated expression pattern, in which FOS was attributed to early osteogenic but not chondrogenic differentiation. CONCLUSION: Undifferentiated hMSCs are highly sensitive to mechanical strain with a transcriptionally controlled osteo-chondrogenic differentiation response in vitro.
Find related publications in this database (using NLM MeSH Indexing)
Adult -
Aged -
Aged, 80 and over -
Alkaline Phosphatase - analysis
Biological Markers - metabolism
Bone Marrow Cells - physiology
Cells, Cultured - physiology
Chondrogenesis - genetics
Female - genetics
Humans - genetics
Male - genetics
Mesenchymal Stem Cells - enzymology
Middle Aged - enzymology
Osteogenesis - genetics
Reverse Transcriptase Polymerase Chain Reaction - genetics
Stress, Mechanical - genetics
Stromal Cells - physiology
Transcription Factors - genetics

Find related publications in this database (Keywords)
bone marrow stromal cells
osteogenesis
chondrogenesis
endochondral ossification
c-Fos
integrin receptors
mechanical strain
donor-to-donor variance
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