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Evidences for a New Role of miR-214 in Chondrogenesis

Vânia Palma Roberto1,2,3,4, Paulo Gavaia1,4, Maria João Nunes5

  • 1Centre of Marine Sciences (CCMAR/CIMAR-LA), University of Algarve, 8005-139, Faro, Portugal.

Scientific Reports
|March 1, 2018
PubMed

Insights

MicroRNA-214 (miR-214) inhibits chondrocyte differentiation in vertebrates. This microRNA impacts cranial cartilage formation in zebrafish by targeting activating transcription factor 4 (Atf4).

Area of Science:

  • Developmental Biology
  • Molecular Biology
  • Genetics

Background:

  • MicroRNA-214 (miR-214) is implicated in mammalian skeletal development, inhibiting osteogenesis and promoting osteoclastogenesis.
  • Its role in chondrogenesis and in non-mammalian vertebrates remains largely unexplored.

Purpose of the Study:

  • To investigate the function of miR-214 in chondrogenesis across vertebrates.
  • To elucidate the molecular mechanisms underlying miR-214's role in cartilage development.

Main Methods:

  • Expression analysis of miR-214 in zebrafish and murine chondrocytes.
  • In vitro and in vivo overexpression studies of miR-214 in zebrafish.
  • Identification of miR-214 targets using computational and experimental approaches.

Main Results:

  • miR-214 is expressed in zebrafish bone and cartilage and downregulated during murine chondrocyte differentiation.
  • Transcriptional regulation of miR-214 primary transcript (Dnm3os) by Ets1 is conserved in vertebrates.
  • Overexpression of miR-214 inhibits chondrocyte differentiation by targeting Atf4, leading to reduced expression of Sox9 and Col2a1.
  • In vivo miR-214 overexpression in zebrafish impaired cranial cartilage formation.

Conclusions:

  • miR-214 plays a conserved negative role in chondrogenesis by inhibiting chondrocyte differentiation.
  • The mechanism involves targeting Atf4, impacting key chondrogenic gene expression.
  • These findings highlight miR-214 as a potential regulator of skeletal development in vertebrates.

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