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  1. Silver nanoparticles increase connexin43-mediated gap junctional intercellular communication in HaCaT cells through activation of reactive oxygen species and mitogen-activated protein kinase signal pathway
  2. HDAC4 stabilizes SIRT1 via sumoylation SIRT1 to delay cellular senescence
  3. Calorie restriction upregulated sirtuin 1 by attenuating its ubiquitin degradation in cancer cells