Kaempferol inhibits atherosclerotic plaque development via dual-targeting of p53-p21-p16 senescence pathway and Nrf2/HO-1/NQO1 antioxidant mechanism: Insights from combined in vivo and in vitro research

  • Int Immunopharmacol. 2025 Sep 20:166:115587. doi: 10.1016/j.intimp.2025.115587.
Xinyi Cai  1 ,  Yajie Zhang  2 ,  Weina Zhu  3 ,  Ning Gu  4
Affiliations
  • 1. Nanjing Hospital of Chinese Medicine, affiliated with Nanjing University of Chinese Medicine, Nanjing, China.. Electronic address: [email protected].
  • 2. Central Laboratory, Nanjing Hospital of Chinese Medicine, affiliated with Nanjing University of Chinese Medicine, Nanjing, China. Electronic address: [email protected].
  • 3. Central Laboratory, Nanjing Hospital of Chinese Medicine, affiliated with Nanjing University of Chinese Medicine, Nanjing, China. Electronic address: [email protected].
  • 4. Nanjing Hospital of Chinese Medicine, affiliated with Nanjing University of Chinese Medicine, Nanjing, China.. Electronic address: [email protected].
PMID: 40976052 DOI: 10.1016/j.intimp.2025.115587
Abstract

Background: Atherosclerosis, a leading cause of Cardiovascular Disease, is driven by aging-related endothelial cell senescence, oxidative stress, and inflammation. Kaempferol, a dietary flavonoid, exerts potent antioxidant and anti-senescence effects on the vasculature.

Objective: We investigated whether kaempferol mitigates atherosclerosis through dual suppression of vascular oxidative damage and endothelial senescence.

Methods: Male apoE-/- mice on a high-fat diet were treated with kaempferol or vehicle. Atherosclerotic lesions were quantified in the aorta (Oil Red O staining), and endothelial function was assessed by vasodilation assays. Aortic tissues were analyzed for oxidative stress markers (ROS, MDA, SOD) and inflammatory cytokines (TNF-α, IL-6). Endothelial senescence in the vasculature was evaluated by γ-H2A.X staining and expression of p53, p16INK4a and p21. Separately, human endothelial cells were exposed to H₂O₂ to induce oxidative stress and senescence, with or without kaempferol; ROS levels and markers of cellular senescence (SA-β-gal, p53, p16INK4a, p21) were then measured.

Results: Kaempferol-treated mice exhibited markedly smaller aortic plaque areas than controls. Endothelium-dependent vasorelaxation improved, and oxidative stress in the aorta was attenuated (reduced ROS/MDA, increased SOD activity). Pro-inflammatory TNF-α and IL-6 levels were suppressed, while antioxidant Nrf2 and HO-1 expression was elevated. In vitro, kaempferol significantly reduced H₂O₂-induced endothelial senescence: treated cells showed fewer SA-β-gal-positive cells and decreased expression of p16INK4a and p21, indicating reduced cellular aging.

Conclusion: Kaempferol significantly ameliorates experimental atherosclerosis via simultaneous antioxidative and anti-senescent actions, highlighting its potential as a therapeutic agent for vascular disease.

Keywords
Atherosclerosis; Cellular senescence; Kaempferol; Oxidative stress; p53 signaling pathway.
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