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microRNA-181a-5p antisense oligonucleotides attenuate osteoarthritis in facet and knee joints

Akihiro Nakamura1,2,3, Yoga Raja Rampersaud1,4, Sayaka Nakamura1,2

  • 1Arthritis Program, University Health Network, Toronto, Ontario, Canada.

Annals of the Rheumatic Diseases
|October 6, 2018
PubMed
Abstract

Insights

Locked nucleic acid (LNA) miR-181a-5p antisense oligonucleotides (ASO) show promise in protecting against osteoarthritis (OA) cartilage degeneration. This therapeutic approach reduced cartilage breakdown and cell death markers in preclinical models of OA.

Area of Science:

  • Molecular Biology
  • Osteoarthritis Research
  • Therapeutic Development

Background:

  • MicroRNA-181a-5p (miR-181a-5p) is identified as a key factor in lumbar facet joint (FJ) cartilage destruction.
  • Osteoarthritis (OA) involves progressive articular cartilage degeneration, necessitating novel therapeutic strategies.
  • Understanding the role of specific microRNAs in OA pathogenesis is crucial for developing targeted treatments.

Purpose of the Study:

  • To investigate the therapeutic potential of locked nucleic acid (LNA) miR-181a-5p antisense oligonucleotides (ASO) in limiting articular cartilage degeneration.
  • To evaluate the efficacy of LNA-miR-181a-5p ASO in preclinical models of FJ and knee osteoarthritis (OA).

Main Methods:

  • Utilized human samples and animal models (rat FJ OA, mouse knee OA) to assess LNA-miR-181a-5p ASO effects.
  • Employed histopathological analysis, immunohistochemistry, in situ hybridization, flow cytometry, qPCR, and immunoblotting to evaluate OA markers and microRNA expression.
  • Administered intra-articular injections of LNA-miR-181a-5p ASO in vivo and tested in vitro/ex vivo chondrocyte and cartilage explant cultures.

Main Results:

  • Elevated miR-181a-5p expression correlated with OA catabolic markers in human and animal OA cartilage.
  • LNA-miR-181a-5p ASO treatment reduced catabolic and apoptotic markers in chondrocytes and attenuated cartilage destruction in vivo.
  • Demonstrated cartilage-protective effects of LNA-miR-181a-5p ASO in human OA chondrocytes and cartilage explants.

Conclusions:

  • LNA-miR-181a-5p ASO effectively reduces markers of cartilage degeneration and cell death in OA.
  • This study provides the first evidence that LNA-miR-181a-5p ASO exhibits significant cartilage-protective effects in both FJ and knee OA.
Keywords:
chondrocytesmicroRNAosteoarthritistreatment

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