## Abstract Cigarette smoking is a major risk factor for squamous cell carcinoma of the head and neck (SCCHN), but only a fraction of those exposed to cigarette smoke develops SCCHN, suggesting variation in individual susceptibility. Tobacco smoke contains a number of carcinogens that cause various
In vitro studies on chemoprotective effect of purnark against benzo(a)pyrene-induced chromosomal damage in human lymphocytes.
โ Scribed by S.D. Ghaisas; S.V. Bhide
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 376 KB
- Volume
- 18
- Category
- Article
- ISSN
- 1065-6995
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โฆ Synopsis
Abstract
Human lymphocytes were used as an assay system to test chemopreventive activity of natural products. Purnark, a mixture of extracts of turmeric, betel leaf and catechu, was tested for its chemoprotective activity against BP induced DNA damage. Sister chromatid exchange and micronuclei were used as markers to assess the protective activity of Purnark. Purnark gave 50โ60 % protection against BP induced SCEs and micronuclei. Purnark at 1000ฮผg dose did not show any genotoxicity.
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The cytogenetic potential of 10 sex steroids (cyproterone acetate, drospirenone, gestodene, cyclodiol, cyclotriol, ethinylestradiol, atamestane, lilopristone, onapristone and propylmesterolone) with various medical indications was determined using the chromosomal aberration test in human lymphocytes