The role of Alk-1 and Alk-5 in the mechanosensing of chondrocytes

• Autorzy: Sanz-Ramos P. , Dotor J. , Izal-Azcarate I.
• Języki publikacji: EN

Abstrakty

EN

We aim to demonstrate the role of Alk receptors in the response of hydrogel expansion. Chondrocytes from rat knees were cultured onto plastic and hydrogel surfaces. Alk-1 and Alk-5 were overexpressed or silenced and the effects on cells during expansion were tested and confirmed using peptide inhibitors for TGFβ. Overexpression of Alk-5 and silencing of Alk-1 led to a loss of the chondrocyte phenotype, proving that they are key regulators of chondrocyte mechanosensing. An analysis of the gene expression profile during the expansion of these modified cartilage cells in plastic showed a better maintenance of the chondrocyte phenotype, at least during the first passages. These passages were also assayed in a mouse model of intramuscular chondrogenesis. Our findings indicate that these two receptors are important mediators in the response of chondrocytes to changes in the mechanical environment, making them suitable targets for modulating chondrogenesis. Inhibition of TGFβ could also be effective in improving chondrocyte activity in aged or expanded cells that overexpress Alk-1.

Słowa kluczowe

EN

activin; activin receptor-like kinase 1; activin receptor-like kinase 5; mechanosensing; chondrocyte; transforming growth factor-beta; collagen

• Wydawca: -
• Czasopismo: Cellular and Molecular Biology Letters
• Rocznik: 2014
• Tom: 19
• Numer: 4
• Opis fizyczny: p.659-674,fig.,ref.

Twórcy

autor

Sanz-Ramos P.

• Laboratory for Orthopaedic Research, University of Navarra, School of Medicine, Pamplona, Spain

autor

Dotor J.

• DIGNA Biotech, Pamplona, Spain

autor

Izal-Azcarate I.

• Laboratory for Orthopaedic Research, University of Navarra, School of Medicine, Pamplona, Spain

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Identyfikatory

DOI

10.2478/s11658-014-0220-6