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Updated: Sep 26, 2026

Studying Cell Cycle-regulated Gene Expression by Two Complementary Cell Synchronization Protocols
12:02

Studying Cell Cycle-regulated Gene Expression by Two Complementary Cell Synchronization Protocols

Published on: June 6, 2017

[Effects of microcystins on cell cycle and expressions of c-fos and c-jun]

Jin-ming Zhao1, Hui-gang Zhu

  • 1School of Public Health, Fudan University, Shanghai 200032, China.

Zhonghua Yu Fang Yi Xue Za Zhi [Chinese Journal of Preventive Medicine]
|May 23, 2003
PubMed
Abstract

Insights

Microcystins exposure up-regulates c-fos and c-jun expression, driving abnormal cell proliferation. This suggests a potential carcinogenic mechanism for microcystins, impacting cell cycle progression.

Area of Science:

  • Environmental toxicology
  • Cellular biology
  • Molecular carcinogenesis

Context:

  • Microcystins are potent toxins produced by cyanobacteria.
  • Exposure to microcystins poses a significant risk to aquatic ecosystems and human health.
  • Understanding the molecular mechanisms of microcystin toxicity is crucial for risk assessment.

Purpose:

  • To investigate the effects of microcystins on cell cycle regulation.
  • To examine the impact of microcystins on the expression of c-fos and c-jun proto-oncogenes.
  • To elucidate the potential carcinogenic pathways initiated by microcystins.

Summary:

  • Microcystins induced sustained up-regulation of c-fos and c-jun expression in SHE cells, with a 5-6 fold increase observed at 6 hours.
  • A significant portion of cells (44.8%) were stimulated to enter the S-phase from the G(0)/G(1) resting phase.
  • These findings indicate that microcystins can disrupt normal cell cycle progression and promote cellular proliferation.

Impact:

  • This study reveals a potential carcinogenic mechanism for microcystins involving the induction of transcription factors like c-fos and c-jun.
  • The findings contribute to a better understanding of microcystin-induced cellular damage and cancer risk.
  • This research has implications for public health policies and environmental monitoring related to cyanobacterial blooms.

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