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The genotoxic effect of nicotine on chromosomes of human fetal cells: The first report described as an important study.

06:00 EDT 1st November 2011 | BioPortfolio

Summary of "The genotoxic effect of nicotine on chromosomes of human fetal cells: The first report described as an important study."

Context: Recent studies have suggested a direct contribution of nicotine - the addictive component of tobacco and tobacco smoke - to human carcinogenesis, and it remains the most common harmful substance to which pregnant women are exposed. Also, it has deleterious effects on the fetus. The sperm of smoking fathers and newborns of smoking mothers have elevated frequencies of chromosome translocations and DNA strand breaks. Objective: We tried to understand the genotoxic effect of nicotine in pregnancies of active or passive smoking mothers. For this reason, we provide the evidence that nicotine exposure in vitro has detrimental effects on fetal cells. Materials and methods: We examined the effect of nicotine sulphate on amniotic cells by designing an experimental setting consisting fetal cells grown in nicotine containing medium (25 ng/mL) in study group and fetal cells grown in control medium, which did not contain nicotine. Results: According to our findings, there is a significant difference of chromosomal aberrations (CAs) between nicotine containing medium grown cells and control medium grown cells, determined by the χ2 test (P <0.001). We found CAs in 21.5% of cells analyzed. The 19.4% of the all cells had numerical aberrations. Chromosomes 21, 22, 8, 15 and 20 related numerical abnormalities were found to be the most frequent numerical abnormalities. Conclusion: Results of this study confirm that the nicotine leads to significant direct genotoxic effects in human fetal cells in vitro. We speculate that there is an association between prenatal exposure to cigarette smoke and in utero aneuploidies.

Affiliation

Department of Medical Biology and Genetics, Çukurova University , Adana , Turkey.

Journal Details

This article was published in the following journal.

Name: Inhalation toxicology
ISSN: 1091-7691
Pages: 829-34

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One of the two pairs of human chromosomes in the group B class (CHROMOSOMES, HUMAN, 4-5).

A condition of abnormally low AMNIOTIC FLUID volume. Principal causes include malformations of fetal URINARY TRACT; FETAL GROWTH RETARDATION; GESTATIONAL HYPERTENSION; nicotine poisoning; and PROLONGED PREGNANCY.

Very long DNA molecules and associated proteins, HISTONES, and non-histone chromosomal proteins (CHROMOSOMAL PROTEINS, NON-HISTONE). Normally 46 chromosomes, including two sex chromosomes are found in the nucleus of human cells. They carry the hereditary information of the individual.

A specific pair of human chromosomes in group A (CHROMOSOMES, HUMAN, 1-3) of the human chromosome classification.

A specific pair of human chromosomes in group A (CHROMOSOMES, HUMAN, 1-3) of the human chromosome classification.

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