Blocking interleukin-6 trans-signaling protects against renal fibrosis by suppressing STAT3 activation

Wei Chen1, Hui Yuan1, Wenmin Cao1

  • 1Department of Urology, Drum Tower Hospital, Medical School of Nanjing University, Institute of Urology, Nanjing University, Nanjing, Jiangsu, China.

Theranostics
|July 9, 2019
PubMed

Insights

Targeting interleukin-6 (IL-6) trans-signaling with Fc-gp130 effectively reduced renal fibrosis in mouse models. This approach offers a promising new therapeutic strategy for kidney disease by inhibiting key fibrotic pathways.

Area of Science:

  • Nephrology
  • Immunology
  • Molecular Biology

Background:

  • Renal fibrosis is an irreversible consequence of chronic kidney disease with limited treatment options.
  • Elevated interleukin-6 (IL-6) signaling is implicated in the progression of renal fibrosis.

Purpose of the Study:

  • To investigate the therapeutic potential of blocking IL-6 trans-signaling in renal fibrosis.
  • To evaluate the efficacy of Fc-gp130, an IL-6 trans-signaling inhibitor, in preclinical models of kidney fibrosis.

Main Methods:

  • Utilized unilateral ureteral occlusion (UUO) and ischemia-reperfusion (IR) mouse models to induce renal fibrosis.
  • Administered Fc-gp130 to block IL-6 trans-signaling and assessed its impact on fibrotic markers, inflammation, and cellular signaling.
  • Conducted in vitro experiments using fibroblasts to elucidate the mechanism of action.

Main Results:

  • Fc-gp130 treatment significantly attenuated renal fibrosis, reducing tubular atrophy and extracellular matrix deposition in UUO and IR models.
  • Blockade of IL-6 trans-signaling decreased inflammation, immune cell infiltration, and STAT3 phosphorylation, a key mediator of fibrosis.
  • Fc-gp130 inhibited TGF-β1-induced STAT3 phosphorylation in fibroblasts, demonstrating a direct cellular effect.

Conclusions:

  • IL-6 trans-signaling plays a critical role in the pathogenesis of renal fibrosis.
  • Targeting IL-6 trans-signaling with Fc-gp130 represents a novel and effective therapeutic strategy for treating renal fibrosis and related kidney diseases.

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