To target cellular senescence in diabetic kidney disease: the known and the unknown

Area of Science:

• Cellular and Molecular Biology
• Nephrology
• Gerontology

Background:

• Diabetic kidney disease (DKD) is a leading cause of end-stage renal disease (ESRD) with limited treatment options.
• Cellular senescence, characterized by cell cycle arrest and the senescence-associated secretory phenotype (SASP), is increasingly implicated in DKD pathogenesis.
• Senescence in DKD is linked to mitochondrial dysfunction, autophagy, and endoplasmic reticulum stress.

Purpose of the Study:

• To review the current understanding of cellular senescence in the context of diabetic kidney disease.
• To summarize the molecular mechanisms linking senescence to DKD progression.
• To explore potential therapeutic strategies targeting senescence for DKD treatment.

Main Methods:

• Literature review of studies investigating cellular senescence in DKD.
• Analysis of evidence linking senescence markers (e.g., SA-β-Gal) and SASP to kidney damage in diabetes.
• Examination of the role of mitochondrial redox pathways, autophagy, and ER stress in DKD-associated senescence.

Main Results:

• Accumulation of senescent cells in the diabetic kidney impairs tissue repair and promotes inflammation and fibrosis via SASP.
• Senescence in DKD is associated with key cellular stress pathways, including mitochondrial dysfunction and ER stress.
• Existing diabetes treatments may offer renoprotection partly by mitigating renal senescence.

Conclusions:

• Cellular senescence is a key driver of DKD pathogenesis, contributing to inflammation and fibrosis.
• Targeting senescent cell accumulation and their SASP represents a promising therapeutic avenue for DKD.
• Further research into senolytic therapies could lead to novel treatments for preventing and managing DKD.