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The ability of a drug to produce structural deformations and functional abnormalities in the developing embryo or the fetus is called teratogenicity, and the drug producing this effect is known as a teratogen. Teratogenic effects include stillbirth, miscarriage, intrauterine growth restriction, and neurocognitive delay. A teratogen may affect the embryo at different stages of development, which is important in determining the type and extent of the damage. During blastocyst formation, the early...

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Nitric oxide rescues thalidomide mediated teratogenicity.

Jamila H Siamwala¹, Vimal Veeriah, M Krishna Priya

¹Vascular Biology Lab, AU-KBC Research Centre, Anna University, MIT Campus, Chennai, India.

Scientific Reports

|September 22, 2012

Summary

Nitric oxide (NO) significantly reduces thalidomide-induced limb deformities in chick and zebrafish embryos. This discovery offers a potential therapeutic strategy against drug-induced developmental abnormalities.

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Area of Science:

Developmental biology
Pharmacology
Embryology

Background:

Thalidomide, a drug with therapeutic potential, historically caused severe limb deformities in infants.
An antidote for thalidomide-induced teratogenicity remains a critical unmet medical need.

Purpose of the Study:

To investigate the potential of nitric oxide (NO) as a protective agent against thalidomide-induced limb deformities.
To evaluate the efficacy of NO in chick and zebrafish embryo models.

Main Methods:

Exposure of chick (Gallus gallus) and zebrafish (Danio rerio) embryos to thalidomide.
Treatment of thalidomide-affected embryos with nitric oxide (NO).
Assessment of limb development, angiogenesis, oxidative stress, and apoptosis.

Main Results:

Nitric oxide (NO) reduced thalidomide-mediated limb deformities by 94% in chick embryos and 80% in zebrafish embryos.
NO treatment promoted angiogenesis, a key process in limb development.
NO mitigated oxidative stress and inhibited caspase-3 dependent apoptosis.

Conclusions:

Nitric oxide (NO) demonstrates significant protective effects against thalidomide-induced limb deformities.
NO's mechanism involves promoting angiogenesis and reducing apoptosis.
NO represents a promising therapeutic avenue for preventing teratogenic effects.