Title:Assessment of Antioxidant Effect of Beta-Glucan on the Whole Blood
Oxidative DNA Damage with the Comet Assay in Colorectal Cancer
Volume: 15
Author(s): Necla Benlier, Nilay Uçar, Eda Öğüt, Havva Yeşil Çinkir, Mustafa Yildirim, Pınar Günel Karadeniz, Esra Küpeli Akkol*, Haroon Khan and Eyüp Ilker Saygili*
Affiliation:
- Department of Pharmacognosy, Faculty of Pharmacy, Gazi
University, Etiler 06330, Ankara, Turkey
- Department
of Molecular Medicine, SANKO University Graduate Institute of Education, 27090, Gaziantep, Turkey
- Department
of Medical Biochemistry, SANKO University School of Medicine, 27090, Gaziantep, Turkey
Keywords:
Antioxidant effect, beta-glucan, colorectal cancer, comet assay, DNA damage.
Abstract:
Objective: The present study aims to evaluate the antioxidant effect of beta-glucan on
oxidative DNA damage by comet assay.
Methods: A total of 19 adult females and males diagnosed with stage 3-4 colorectal cancer and a
control group of 20 age-matched healthy subjects were enrolled in the study. Blood samples of the
participants were analyzed using Comet Assay for the parameters of DNA damage.
Results: Significantly increased DNA damage was observed in patients versus the control group as
indicated by greater values of tail moment, tail percent DNA and tail length. Following incubation
with β-glucan, a substantial reduction was found in the aforementioned parameters of DNA damage.
Comet assay revealed significant levels of endogenous DNA damage in patients as shown by
remarkable increases in the tail moment, the percentage of DNA in the tail and the tail length values,
in comparison with the control group. Following treatment of fresh whole blood with β-glucan
incubation, DNA damages were significantly reduced, but lower values were observed after β-glucan
incubation in the patient group versus control group.
Conclusion: β-Glucan was found to reduce DNA damage substantially in colorectal cancer patients
and show antimutagenic effects. Our results suggested that dietary β-glucan intake might be
important in the genesis of colorectal cancer tumors.