INCREASED URINARY 8-OXO-7,8-DIHYDRO-2â€²-DEOXYGUANOSINE EXCRETION IN A SAMPLE OF EGYPTIAN CHILDREN WITH BETA THALASSEMIA MAJOR: MARKER FOR LIPID PEROXIDATION-INDUCED DNA DAMAGE

Mona A Elabd; Dina Abu Zeid; Marwa A Elhady; Maged A. El Wakeel; Ghada M. El-kassas; Rania N Sabry; Eman Awadallah

doi:10.22159/ajpcr.2017.v10i12.21045

Authors

Mona A Elabd Department of Child Health, National Research Centre, Cairo, Egypt. http://orcid.org/0000-0002-1417-8307
Dina Abu Zeid Department of Child Health, National Research Centre, Cairo, Egypt.
Marwa A Elhady Department of Pediatrics, Faculty of Medicine, Cairo University, Cairo, Egypt. 3Department of Clinical and Chemical Pathology, National Research Centre, Cairo, Egypt
Maged A. El Wakeel Department of Child Health, National Research Centre, Cairo, Egypt. 2Department of Pediatrics, Faculty of Medicine, Cairo University,Cairo, Egypt.
Ghada M. El-kassas Department of Child Health, National Research Centre, Cairo, Egypt.
Rania N Sabry Department of Child Health, National Research Centre, Cairo, Egypt.
Eman Awadallah Department of Clinical and Chemical Pathology, National Research Centre, Cairo, Egypt.

DOI:

https://doi.org/10.22159/ajpcr.2017.v10i12.21045

Keywords:

Thalassemia major, Children, oxidative stress, Oxidative DNA damage

Abstract

Objective: The objective of this research was to evaluate oxidative stress status in children with Î²-thalassemia major.

Methods: Our study was conducted in children with Î²-thalassemia aged from 5 to 15 years. Investigate the urinary excretion of human 8-oxo-7,8- dihydro-2â€²-deoxyguanosine, which will be analyzed by enzyme-linked immunosorbent assay. To investigate serum levels of antioxidant enzymes include glutathione s-transferase (GST) and catalase (CAT).

Results: We found a significant elevation of the urinary 8-oxo-7,8-dihydro-2â€²-deoxyguanosine level with p=0.001 compared to control group, a significant reduction of both GST and CAT p=0.05 and 0.03, respectively, compared to control group. There was a significant negative correlation between urinary 8-oxo-7,8-dihydro-2â€²-deoxyguanisine and CAT level, r=âˆ’0.378, p=0.016, hemoglobin - r=âˆ’0.610, p=0.001, hematocrit (%) - r=âˆ’0.478, p=0.002, while a significant positive correlation between urinary 8-oxo-7,8-dihydro-2â€²-deoxyguanisine and alanine aminotransferase - r=0.547, p=0.001, and serum ferritin - r=0.391, p=0.013. There was a significant negative correlation between CAT and serum ferritin - r=âˆ’0.320, p=0.44.

Conclusion: We conclude that the strongly increased urinary excretion 8-oxo-7,8=dihydro-2â€²-deoxyguanisine indicates elevated lipid peroxidation induced DNA damage in internal organs such as the liver. These highly pro mutagenic lesions may contribute to the increased risk of thalassemia patients to develop hepatocellular carcinoma.

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