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Detecting role of apoptosis in mediating cyclophosphamide induced teratogenesis in vitro

Gyanendra Singh1, Neeraj Sinha, Jayendra Koushik C

  • 1Division of Toxicology, Central Drug Research Institute, Lucknow, 226001, India.

Toxicology Mechanisms and Methods
|December 22, 2009
PubMed

Insights

Cyclophosphamide (CP) exposure causes birth defects by inducing programmed cell death (apoptosis) in developing rat embryos. This teratogenic effect is dose-dependent, with higher CP concentrations leading to significant malformations and growth retardation.

Area of Science:

  • Developmental Biology
  • Toxicology
  • Cell Biology

Background:

  • Programmed cell death, or apoptosis, is crucial for normal embryonic development.
  • Alterations in apoptosis can lead to birth defects and malformations.
  • Cyclophosphamide (CP) is a known teratogen, but its precise mechanism in mediating these effects is under investigation.

Purpose of the Study:

  • To investigate the role of apoptosis in cyclophosphamide-induced teratogenicity in vitro.
  • To determine the dose-dependent effects of CP on embryonic development and apoptosis.

Main Methods:

  • Rat embryos (11-day-old) were cultured with varying concentrations of CP (0, 5, 10, 100 μg/mL).
  • Embryonic development, malformations, and growth retardation were assessed.
  • Apoptosis was evaluated using flow cytometry (cell cycle, annexin V binding) and DNA fragmentation assays.

Main Results:

  • CP concentrations of 10 and 100 μg/mL induced significant malformations and growth retardation in cultured rat embryos.
  • A lower concentration of 5 μg/mL CP did not show significant adverse effects on embryonic development.
  • Apoptosis assays confirmed a dose-dependent increase in programmed cell death correlating with CP exposure.

Conclusions:

  • Apoptosis plays a significant role in mediating the teratogenic effects of cyclophosphamide in vitro.
  • The teratogenicity of CP is dose-dependent, with higher concentrations inducing more severe developmental abnormalities via apoptosis.

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