eCite Digital Repository

Evaluating the levels of oxidative DNA damage in human lymphocytes in response to caffeine using comet assay (single cell gel electrophoresis)


Al-Wasiti, EA and Al-Shaban, SAW and Al-Salihi, AR and Al-Aubaidy, HA, Evaluating the levels of oxidative DNA damage in human lymphocytes in response to caffeine using comet assay (single cell gel electrophoresis), International Journal of Pharmacy and Pharmaceutical Sciences, 8, (6) pp. 137-141. ISSN 0975-1491 (2016) [Refereed Article]


Copyright Statement

Copyright 2016 The Authors Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0)

Official URL:


Objectives: Caffeine asin (coffee, cola, and tea) is the most widely consumed beverages worldwide. The current study aims to evaluate the effects of caffeine in different concentrations on human cultured peripheral lymphocytes, in healthy individuals, using comet assay. The extent of DNA damage reflects a balance between oxidative stress (the presence of hydrogen peroxide H2O2 as a reactive oxygen species ROS), and DNA repair ability (the presence of anti-oxidant may be caffeine substances at known concentrations). This is an important method to prevent and avoid many cancerous diseases in an era of various pollutants.

Methods: Ten milliliters of venous blood samples were collected from 40 healthy young individuals, and lymphocyte cultures were set up after lymphocyte isolation with ficoll centrifugation. The mixture of lymphocytes culture media was incubated in the sterile incubator for 5 min after adding serial concentrations of caffeine (100, 500, 5000, 10000) g/ml, as(group1,2,3,4 respectively) to 5% H2O2. The levels of oxidative DNA damage were expressed as comet tail length.

Results: At concentration 100 ug/ml, there was a significant elevation in the mean comet tail length level in cultured lymphocytes treated with hydrogen peroxide (106.96 m) compared with the treated with All (mixture of caffeine, and H2O2), 6.670 m.

Conclusion: Weve concluded that a caffeine concentration of 100 g/ml possesses the strongest anti-oxidant properties and causes much less DNA damage in lymphocytic culture when exposed to hydrogen peroxide.

Item Details

Item Type:Refereed Article
Keywords:oxidative DNA damage, comet assay, lymphocyte, hydrogen peroxide
Research Division:Biomedical and Clinical Sciences
Research Group:Medical biochemistry and metabolomics
Research Field:Medical biochemistry - carbohydrates
Objective Division:Health
Objective Group:Clinical health
Objective Field:Clinical health not elsewhere classified
UTAS Author:Al-Aubaidy, HA (Dr Hayder Al-Aubaidy)
ID Code:109516
Year Published:2016
Deposited By:Medicine
Deposited On:2016-06-21
Last Modified:2018-03-06
Downloads:91 View Download Statistics

Repository Staff Only: item control page