Genotoxicity assessment in smokeless tobacco users: a case-control study.

Area of Science:

• Genetics
• Public Health
• Epidemiology

Background:

• India has a deep-rooted history of tobacco consumption, encompassing both smoking and smokeless forms.
• Smokeless tobacco products are increasingly accessible and affordable, leading to widespread use across literacy levels.
• Growing epidemiological evidence links smokeless tobacco use to elevated cancer risks.

Purpose of the Study:

• To investigate the genotoxic impact of smokeless tobacco consumption.
• To analyze cytogenetic endpoints, specifically chromosome aberrations and micronuclei formation.
• To assess these effects in a population residing in the hilly regions of Yerkaud, South India.

Main Methods:

• Enrolled 85 smokeless tobacco users and 85 age- and sex-matched non-tobacco users as controls.
• Analyzed chromosome aberrations in peripheral blood lymphocytes.
• Assessed micronucleus formation in peripheral blood and buccal cells.

Main Results:

• Smokeless tobacco users exhibited significantly higher levels of chromosomal damage compared to controls.
• Elevated frequencies of micronucleated cells were observed in tobacco users.
• The extent of genetic damage was found to be dependent on the duration of smokeless tobacco use.

Conclusions:

• Smokeless tobacco use is associated with significant genotoxic effects.
• The duration of use is a critical factor influencing the severity of genetic damage.
• Findings underscore the importance of raising global awareness about the health risks of smokeless tobacco products.