Comparative evaluation of genotoxicity in tobacco users versus nontobacco users

Arun Jacob Thomas; Bindu J Nair; Sajna Oommen; V Syamkumar; Resmi K Raman

doi:10.4103/jpbs.jpbs_60_21

Journal of Pharmacy And Bioallied Sciences

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ORIGINAL ARTICLE

Year : 2021 | Volume : 13 | Issue : 6 | Page : 960-964

Comparative evaluation of genotoxicity in tobacco users versus nontobacco users

Arun Jacob Thomas¹, Bindu J Nair², Sajna Oommen³, V Syamkumar⁴, Resmi K Raman⁵
¹ Departments of Oral and Maxillofacial Pathology, Noorul Islam College of Dental Science, Pathamkallu, Kerala, India
² Dr. Vivek's Dental Clinic, Thiruvananthapuram, Kerala, India
³ Prosthodontics, Noorul Islam College of Dental Science, Pathamkallu, Kerala, India
⁴ Public Health Dentistry, Noorul Islam College of Dental Science, Pathamkallu, Kerala, India
⁵ Department of Oral and Maxillofacial Pathology, Kerala State Health Services, General Hospital, Kottayam, Kerala, India

Correspondence Address:
Arun Jacob Thomas
Department of Oral and Maxillofacial Pathology, Noorul Islam College of Dental Science, Thiruvananthapuram, Kerala
India

Source of Support: None, Conflict of Interest: None

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DOI: 10.4103/jpbs.jpbs_60_21

Background: Many of the contents of cigarette smoke are genotoxic in nature, and consequently, cytogenetic injury seems to be a trustworthy biomarker for deciding the influence of exposure to chromosome damaging agents in smoke. The cytokinesis-block micronucleus assay (CBMN assay) has been proven to be an effectual tool for the study of micronuclei (MN) that will help in estimating the genotoxicity in tobacco users alone which will further help in early cancer detection. Objective: The objective is to find out whether there is pronounced contrast in genotoxicity between tobacco users and nonusers by determining MN number in peripheral blood lymphocytes using CBMN assay. Methodology: MN frequency in peripheral blood lymphocytes was estimated in 5 ml of fresh blood obtained from sixty individuals using tobacco either smoking, chewing, or combination of both and also from thirty individuals with no habit of tobacco use. All were in the age group of 20–40 years. Results: There was a significant increase in genotoxicity in tobacco users when compared to that of nontobacco users. A positive correlation was also obtained between smoking index and MN frequency in the study. Conclusion: Approximation of frequency of MN by CBMN assay can be used to evaluate the genotoxicity present in blood and helps in identifying tobacco users who are at a high risk for the presence of cancer even before the appearance of clinical changes.

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