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Fatty acid receptor modulator PBI-4050 inhibits kidney fibrosis and improves glycemic control

Yan Li1,2,3, Sungjin Chung1,2, Zhilian Li1,2

  • 1Division of Nephrology and Hypertension, Department of Medicine, and.

JCI Insight
|May 18, 2018
PubMed

Insights

PBI-4050, an antifibrotic compound, improved glycemic control and extended lifespan in diabetic mice. It also protected against diabetic nephropathy by reducing kidney fibrosis, inflammation, and oxidative stress.

Area of Science:

  • Nephrology
  • Endocrinology
  • Pharmacology

Background:

  • Diabetic nephropathy (DN) is a major complication of diabetes, characterized by progressive kidney fibrosis.
  • Existing treatments for DN have limitations in halting disease progression.
  • PBI-4050 is an orally active compound with demonstrated antifibrotic and anti-inflammatory properties.

Purpose of the Study:

  • To investigate the efficacy of PBI-4050 in ameliorating diabetic nephropathy in a mouse model.
  • To assess the impact of PBI-4050 on glycemic control, kidney fibrosis, and inflammation in diabetic mice.
  • To evaluate the antifibrotic and anti-inflammatory effects of PBI-4050 in a non-diabetic model of kidney injury.

Main Methods:

  • Treatment of eNOS-/- db/db mice with PBI-4050 during early (8-20 weeks) or late (16-24 weeks) stages of diabetes.
  • Assessment of glycemic parameters, insulin levels, islet autophagy, and lifespan.
  • Histological evaluation of kidney injury, albuminuria, glomerular filtration rate, and podocyte loss.
  • Analysis of kidney macrophage infiltration, oxidative stress, and TGF-β signaling pathways.
  • Studies in a non-diabetic model of EGFR-mediated tubulointerstitial injury.

Main Results:

  • PBI-4050 improved fasting hyperglycemia, glucose tolerance, and insulin levels, while increasing islet autophagy.
  • Significant improvements in lifespan were observed in PBI-4050 treated diabetic mice.
  • PBI-4050 treatment reduced glomerular injury, albuminuria, GFR decline, and podocyte loss.
  • The compound inhibited kidney macrophage infiltration, oxidative stress, and TGF-β-mediated fibrosis.
  • PBI-4050 demonstrated direct anti-inflammatory and antifibrotic effects in a non-diabetic kidney injury model.

Conclusions:

  • PBI-4050 effectively attenuates the progression of diabetic nephropathy in type 2 diabetes.
  • The therapeutic benefits are attributed to improved glycemic control and direct inhibition of renal fibrotic pathways.
  • PBI-4050 shows promise as a novel treatment for diabetic kidney disease by reducing inflammation and oxidative stress.
Keywords:
DiabetesFibrosisNephrology

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