# Molecular pathways and emerging therapeutic targets in the pathogenesis of diabetic kidney disease

## TL;DR

This paper reviews molecular pathways in diabetic kidney disease and explores new therapeutic strategies to prevent kidney damage.

## Contribution

The paper synthesizes recent mechanistic insights and highlights novel upstream therapeutic approaches for diabetic kidney disease.

## Key findings

- Multiple pathways like AGE-RAGE signaling and RAAS dysregulation contribute to diabetic kidney disease progression.
- Epigenetic and non-coding RNA changes sustain kidney damage despite improved blood sugar control.
- Emerging therapies target gene-regulatory circuits and metabolic pathways to prevent kidney injury.

## Abstract

Diabetic kidney disease (DKD) arises from intersecting metabolic, hemodynamic, inflammatory, and epigenetic programs that progressively remodel the glomerulus and tubulointerstitium on a molecular level. Hyperglycemia-driven AGE-RAGE signaling, PKC activation, and RAAS dysregulation converge on oxidative stress, endothelial dysfunction, and profibrotic transcription (e.g., TGF-beta/Smad), while mitochondrial and endoplasmic-reticulum stress amplify lipotoxicity and cell death. Innate immune activation (macrophage recruitment and inflammasome signaling) and maladaptive repair promote extracellular-matrix accumulation and nephron loss. Multi-omics studies further implicate durable chromatin and non-coding RNA changes that sustain metabolic memory despite improved glycemia. In this review, we synthesize landmark and recent mechanistic data spanning glomerular filtration barrier injury, tubular stress pathways, and immune-metabolic crosstalk, and we highlight therapeutic strategies that move upstream of symptom control. We discuss established disease-modifying agents (RAAS blockade, SGLT2 inhibitors, and non-steroidal MR antagonists) alongside investigational approaches including epigenetic modulators, AMPK/NAD + axis targeting, and gene/RNA-based interventions. Together, these advances frame DKD as a disorder of rewired signaling and gene-regulatory circuitry, where convergent molecular nodes across podocytes, endothelium, and tubules offer the actionable considerations for durable renal protection.