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Related Experiment Videos

[Vitamin C reverses benzo (a) pyrene-induced cell cycle changes by E2F pathway].

Ai Gao1, Bing-ci Liu, Fu-hai Shen

  • 1National Institute of Occupation Health and Poison Control, Chinese Center for Disease Control and Prevention, Beijing 100050, China.

Zhonghua Yu Fang Yi Xue Za Zhi [Chinese Journal of Preventive Medicine]
|April 28, 2006
PubMed
Summary

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Vitamin C reverses benzo (a) pyrene-induced cell cycle changes in human embryo lung fibroblasts by modulating the cyclin D1-CDK4/E2F-1/4 pathway. This study highlights vitamin C

Area of Science:

  • Cell Biology
  • Molecular Biology
  • Biochemistry

Context:

  • Benzo (a) pyrene (B [a] P) is a polycyclic aromatic hydrocarbon found in environmental pollutants.
  • B [a] P exposure can induce cellular damage, including alterations in cell cycle progression.
  • Understanding the molecular mechanisms underlying B [a] P toxicity is crucial for developing protective strategies.

Purpose:

  • To investigate the role of the E2F1/4 pathway in vitamin C's ability to reverse B [a] P-induced cell cycle changes.
  • To elucidate the relationship between E2F1 and its regulators, cyclin D1 and CDK4, in this process.
  • To examine the effects of vitamin C on B [a] P-induced alterations in human embryo lung fibroblasts (HELF).

Summary:

  • B [a] P significantly increased the expression of cyclin D1, CDK4, E2F1, and E2F4 in HELF cells, leading to an increased percentage of cells in S phase.

Related Experiment Videos

  • Vitamin C treatment, as well as antisense cyclin D1 and antisense CDK4 transfectants, suppressed these B [a] P-induced changes.
  • Vitamin C's protective effect was observed to involve the cyclin D1-CDK4/E2F-1/4 signaling pathway.

    • Impact:

    • This research provides insights into the protective mechanisms of vitamin C against environmental toxicants.
    • The findings contribute to understanding the molecular basis of cell cycle regulation and its disruption by carcinogens.
    • Identifies potential therapeutic targets for mitigating the adverse effects of B [a] P exposure.