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The Clearance Effect of Tetrahedral DNA Nanostructures on Senescent Human Dermal Fibroblasts

Chenchen Mao1, Weiyi Pan1, Xiaoru Shao1

  • 1State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology , Sichuan University , Chengdu , China.

ACS Applied Materials & Interfaces
|December 19, 2018
PubMed

Insights

Tetrahedral DNA nanostructures (TDNs) can clear senescent cells by inducing apoptosis. This study shows TDNs suppress antiapoptotic proteins and activate proapoptotic pathways, offering a new approach for aging research.

Area of Science:

  • Biotechnology
  • Cell Biology
  • Molecular Biology

Background:

  • Senescent cells resist apoptosis and negatively impact tissue function and organismal health.
  • Clearance of senescent cells is a promising strategy to mitigate age-related tissue dysfunction.

Purpose of the Study:

  • To investigate the biological effects of tetrahedral DNA nanostructures (TDNs) on senescent cells.
  • To explore the potential of TDNs for clearing senescent cells.

Main Methods:

  • Treatment of senescent cells with TDNs.
  • Analysis of protein expression levels, focusing on BCL-2 family members (antiapoptotic and proapoptotic).
  • Assessment of apoptosis-related signaling pathways, including caspase-3 activation and cytochrome C release.

Main Results:

  • TDNs induced phenotypic changes in senescent cells.
  • TDNs suppressed antiapoptotic BCL-2 family proteins and upregulated the proapoptotic BAX protein.
  • TDNs promoted cytochrome C release, leading to caspase-3 activation and apoptosis.

Conclusions:

  • TDNs effectively induce apoptosis in senescent cells.
  • TDNs demonstrate a senolytic effect by targeting key apoptotic pathways.
  • These findings establish a basis for applying TDNs in aging and senescence research.
Keywords:
apoptosiscaspaseclearancesenescencetetrahedral DNA nanostructures

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