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Pathogenic role of lncRNA-MALAT1 in endothelial cell dysfunction in diabetes mellitus

J-Y Liu1, J Yao1, X-M Li2

  • 11] Eye Hospital, Nanjing Medical University, Nanjing, China [2] The Fourth School of Clinical Medicine, Nanjing Medical University, Nanjing, China.

Cell Death & Disease
|October 31, 2014
PubMed

Insights

Long noncoding RNA MALAT1 is elevated in diabetic retinopathy. Inhibiting MALAT1 improves retinal vasculature and may offer a new therapy for diabetic eye disease.

Area of Science:

  • Molecular Biology
  • Ophthalmology
  • Genetics

Background:

  • Long noncoding RNAs (lncRNAs) play crucial roles in biological processes.
  • lncRNA-MALAT1 deregulation is linked to diabetic retinopathy (DR) pathogenesis.
  • The specific function of MALAT1 in retinal vasculature remodeling is not fully understood.

Purpose of the Study:

  • To investigate the role of MALAT1 in the pathogenesis of diabetic retinopathy.
  • To explore the therapeutic potential of targeting MALAT1 in DR.

Main Methods:

  • Assessed MALAT1 expression in diabetic rat and mouse models.
  • Evaluated the effects of MALAT1 knockdown on DR features in vivo.
  • Examined the impact of MALAT1 knockdown on retinal endothelial cell functions in vitro.
  • Investigated the involvement of the p38 MAPK signaling pathway.

Main Results:

  • MALAT1 expression was significantly upregulated in diabetic retinas.
  • MALAT1 knockdown ameliorated DR, reducing pericyte loss, capillary degeneration, microvascular leakage, and inflammation.
  • MALAT1 knockdown modulated retinal endothelial cell proliferation, migration, and tube formation.
  • A crosstalk between MALAT1 and p38 MAPK signaling was identified.

Conclusions:

  • MALAT1 upregulation is a key mechanism in diabetes-induced microvascular dysfunction.
  • Inhibiting MALAT1 shows potential as an anti-angiogenic therapeutic strategy for diabetic microvascular complications.

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