Abstract
Background
Fructose intake has increased steadily during the past 2 decades. Fructose, like other reducing sugar, can react with proteins, which may account for aging and cataract formation. Fructose participates in glycation (fructation) and advanced glycation endproducts (AGE) formation some ten times faster than glucose. This study aims to determine the fructose concentration and correlate with antioxidant status in senile diabetic and non-diabetic cataract patients.
Methods
The study included 124 subjects. Of them, 31 were normal senile subjects, 33 were senile diabetic patients without cataract, 30 were senile diabetic patients with cataract, and 30 were senile non-diabetic patients with cataract. The patients were selected on clinical grounds from Eye Ward, Jinnah Postgraduate Medical Centre, Karachi, Pakistan.
Results
Serum fructose was significantly increased (P < 0.001) in senile diabetic patients with and without cataract and senile non-diabetic patients with cataract as compared with senile control subjects. Negative significant correlation was observed between serum fructose and serum total antioxidant status in diabetic and non-diabetic patients with cataract. Positive significant correlation was observed between serum fructose and s-AGEs in diabetic and non-diabetic patients with cataract. Serum total antioxidant status was found to be significantly decreased (P < 0.001) in senile diabetic patients with and without cataract and senile non-diabetic patients with cataract as compared with senile control subjects. Fasting blood glucose, HbA1C and serum fructosamine were significantly increased (P < 0.001) in senile diabetic patients with or without cataract as compared with senile non-diabetic patients with cataract and senile control subjects.
Conclusions
The results indicate that the increased fructose concentration which induces oxidative stress in diabetic and non-diabetic patients with cataract may be a predictor for cataractogenesis.
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Acknowledgement
This work was financially supported by a Pakistan science foundation grant. We are also grateful to Dr. Wasdev Harani, Head of Department, Eye Ward Jinnah Postgraduate Medical Centre, Karachi, Pakistan for providing human samples.
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Gul, A., Rahman, M.A. & Hasnain, S.N. Role of fructose concentration on cataractogenesis in senile diabetic and non-diabetic patients. Graefes Arch Clin Exp Ophthalmol 247, 809–814 (2009). https://doi.org/10.1007/s00417-008-1027-9
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DOI: https://doi.org/10.1007/s00417-008-1027-9