Transcriptomic profiling in human mesangial cells using patient-derived lupus autoantibodies identified miR-10a as a potential regulator of IL8

Sci Rep. 2017 Nov 6;7(1):14517. doi: 10.1038/s41598-017-15160-8.

Abstract

Autoantibody-mediated inflammation directed at resident kidney cells mediates lupus nephritis (LN) pathogenesis. This study investigated the role of miRNA in human mesangial cells (HMCs) stimulated with auto anti-dsDNA immunoglobulin (Ig)G antibodies. HMCs were treated with antibodies purified from active LN patients or non-specific IgG controls in the presence of normal serum. Aberrant miRNA was screened using high throughput sequencing. Anti-dsDNA IgG up-regulated 103 miRNAs and down-regulated 30 miRNAs. The miRNAs regulated genes in the cell cycle, catabolic processes, regulation of transcription and apoptosis signalling. miR-10a was highly abundant in HMCs but was specifically downregulated upon anti-dsDNA IgG induction. Interestingly, the expression of miR-10a in kidney biopsies from class III and IV LN patients (n = 26) was downregulated compared with cadaveric donor kidneys (n = 6). Functional studies highlighted the downstream regulator of miR-10a in the chemokine signalling and cell proliferation or apoptosis pathways. Luciferase assay confirmed for the first time that IL8 was a direct target of miR-10a in HMCs. In conclusion, anti-dsDNA IgG Ab down-regulated miR-10a expression in HMCs resulting in the induction of various target genes involved in HMC proliferation and chemokine expression.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Autoantibodies / metabolism*
  • Female
  • Gene Expression Profiling
  • Gene Expression Regulation
  • Humans
  • Immunoglobulin G / metabolism
  • Interleukin-6 / metabolism
  • Interleukin-8 / metabolism*
  • Lupus Nephritis / immunology*
  • Male
  • Mesangial Cells / immunology*
  • MicroRNAs / metabolism*
  • RNA, Messenger / metabolism

Substances

  • Autoantibodies
  • CXCL8 protein, human
  • IL6 protein, human
  • Immunoglobulin G
  • Interleukin-6
  • Interleukin-8
  • MIRN10 microRNA, human
  • MicroRNAs
  • RNA, Messenger