Resveratrol Attenuates Copper-Induced Senescence by Improving Cellular Proteostasis

Area of Science:

• Cellular Biology
• Aging Research
• Molecular Mechanisms of Senescence

Background:

• Cellular senescence, particularly premature senescence induced by copper sulfate (CuSO4-SIPS), mimics replicative senescence, impacting endoplasmic reticulum proteostasis.
• Disrupted protein homeostasis is linked to age-related cellular dysfunction and increased susceptibility to human disorders.
• Resveratrol, a polyphenol, exhibits potential antiaging properties under specific conditions.

Purpose of the Study:

• To evaluate resveratrol's efficacy in attenuating CuSO4-induced cellular senescence.
• To elucidate the molecular mechanisms underlying resveratrol's antiaging effects in this model.

Main Methods:

• Utilized copper sulfate-induced premature senescence (CuSO4-SIPS) in WI-38 fibroblasts.
• Assessed resveratrol's impact on cell morphology, senescence-associated beta-galactosidase activity, and cell proliferation.
• Investigated changes in protein content, BiP levels, carbonylated and polyubiquitinated proteins, and autophagy markers.

Main Results:

• Resveratrol attenuated typical senescence markers, including morphological changes, increased beta-galactosidase activity, and reduced proliferation.
• The antiaging effects were independent of senescence-associated gene/protein regulation but linked to improved proteostasis.
• Resveratrol restored protein content, reduced BiP levels, decreased protein damage (carbonylated, polyubiquitinated), and induced autophagy.

Conclusions:

• Resveratrol mitigates the stress consequences of CuSO4-induced premature senescence by modulating protein quality control systems.
• The study highlights the critical role of balanced cellular proteostasis in preventing age-associated cellular dysfunction.
• Findings provide insights into resveratrol's antiaging mechanisms and identify potential molecular targets for improving human healthspan.