Inhibition of actin polymerization decreases osteogeneic differentiation of mesenchymal stem cells through p38 MAPK pathway

Himangshu Sonowal, Atul Kumar, Jina Bhattacharyya, Pabitra Kumar Gogoi, Bithiah Grace Jaganathan

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

Background: Mesenchymal Stem Cells (MSC) are important candidates for therapeutic applications due to their ex vivo proliferation and differentiation capacity. MSC differentiation is controlled by both intrinsic and extrinsic factors and actin cytoskeleton plays a major role in the event. In the current study, we tried to understand the initial molecular mechanisms and pathways that regulate the differentiation of MSC into osteocytes or adipocytes. Results: We observed that actin modification was important during differentiation and differentially regulated during adipogenesis and osteogenesis. Initial disruption of actin polymerization reduced further differentiation of MSC into osteocytes and osteogenic differentiation was accompanied by increase in ERK1/2 and p38 MAPK phosphorylation. However, only p38 MAPK phosphorylation was down regulated upon inhibition of actin polymerization which as accompanied by decreased CD49E expression. Conclusion: Taken together, our results show that actin modification is a pre-requisite for MSC differentiation into osteocytes and adipocytes and osteogenic differentiation is regulated through p38 MAPK phosphorylation. Thus by modifying their cytoskeleton the differentiation potential of MSC could be controlled which might have important implications for tissue repair and regeneration.

Original languageEnglish (US)
Article number71
JournalJournal of Biomedical Science
Volume20
Issue number1
DOIs
StatePublished - 2013
Externally publishedYes

Fingerprint

p38 Mitogen-Activated Protein Kinases
Stem cells
Mesenchymal Stromal Cells
Polymerization
Actins
Osteocytes
Phosphorylation
Adipocytes
Cell Differentiation
Adipogenesis
Intrinsic Factor
Cytoskeleton
Actin Cytoskeleton
Osteogenesis
Regeneration
Repair
Tissue

Keywords

  • Actin remodeling
  • Integrin CD49E
  • MSC differentiation

ASJC Scopus subject areas

  • Clinical Biochemistry
  • Molecular Biology
  • Cell Biology
  • Biochemistry, medical
  • Endocrinology, Diabetes and Metabolism
  • Pharmacology (medical)

Cite this

Inhibition of actin polymerization decreases osteogeneic differentiation of mesenchymal stem cells through p38 MAPK pathway. / Sonowal, Himangshu; Kumar, Atul; Bhattacharyya, Jina; Gogoi, Pabitra Kumar; Jaganathan, Bithiah Grace.

In: Journal of Biomedical Science, Vol. 20, No. 1, 71, 2013.

Research output: Contribution to journalArticle

Sonowal, Himangshu ; Kumar, Atul ; Bhattacharyya, Jina ; Gogoi, Pabitra Kumar ; Jaganathan, Bithiah Grace. / Inhibition of actin polymerization decreases osteogeneic differentiation of mesenchymal stem cells through p38 MAPK pathway. In: Journal of Biomedical Science. 2013 ; Vol. 20, No. 1.
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