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Updated: Sep 25, 2025

Optical Sectioning and Visualization of the Intervertebral Disc from Embryonic Development to Degeneration
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Downregulation of miR-760 Causes Human Intervertebral Disc Degeneration by Targeting the MyD88/Nuclear Factor-Kappa B

Xueliang Cui1,2, Yanan Li3, Junping Bao2

  • 1Medical School of Southeast University, Nanjing, China.

Frontiers in Bioengineering and Biotechnology
|April 28, 2022
PubMed

Insights

MicroRNA-760 (miR-760) levels decrease in intervertebral disc degeneration (IDD). Restoring miR-760 promotes nucleus pulposus cell health and may offer a new therapy for IDD.

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Regenerative Medicine

Background:

  • MicroRNAs (miRNAs) are crucial regulators in cellular processes, and their dysregulation is implicated in intervertebral disc degeneration (IDD).
  • Understanding the specific roles of individual miRNAs in IDD pathogenesis is essential for developing targeted therapies.

Purpose of the Study:

  • To investigate the role and mechanism of microRNA-760 (miR-760) in the development of intervertebral disc degeneration (IDD).
  • To evaluate miR-760 as a potential therapeutic target for IDD.

Main Methods:

  • miRNA microarray and quantitative reverse transcription-polymerase chain reaction (qRT-PCR) to profile miRNA expression in IDD patients.
  • In vitro functional assays (cell proliferation, collagen II and aggrecan expression) and in vivo IDD mouse models.
  • Luciferase reporter and Western blotting assays to identify and validate miR-760 target genes.

Main Results:

  • miR-760 expression was significantly reduced in degenerative nucleus pulposus (NP) cells and correlated negatively with IDD severity.
  • miR-760 delivery enhanced NP cell proliferation and increased the expression of collagen II and aggrecan.
  • Myeloid differentiation primary response 88 (MyD88) was identified as a direct target gene of miR-760, with miR-760 suppressing its expression.

Conclusions:

  • miR-760 plays a protective role in intervertebral disc degeneration by targeting MyD88.
  • Upregulation of miR-760 demonstrated therapeutic potential by suspending IDD progression in vivo.
  • miR-760 represents a promising therapeutic target for treating patients with intervertebral disc degeneration.
Keywords:
MyD88NF-κB signaling pathwayintervertebral disc degenerationmiR-760nucleus pulposus cells

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