Chronic Kidney Disease Clinical Trial
Official title:
Study of Klotho Gene Polymorphisms in the Regulation of Serum Phosphate Levels in Hemodialysis Patients
Patients with chronic kidney disease (CKD) and those with end-stage renal disease (ESRD) undergoing renal replacement therapies show elevated serum phosphate levels which predispose them to cardiovascular calcifications and high risks of death from cardiovascular diseases. However, in certain patients hyperphosphatemia is not related to dialysis insufficiency, excessive daily dietary phosphorus intake or high serum parathyroid hormone (PTH) levels, suggesting that other mechanisms could be involved. Transgenic mice lacking the klotho gene showed a phenotype which resembles that of dialyzed ESRD patients, in the sense that they have hyperphosphatemia, vascular calcifications, and a short lifespan. This study will analyze whether functional polymorphisms or variants in the human klotho gene are associated with hyperphosphatemia in these patients.
The entire coding region of the klotho gene will be sequenced looking for functional variants and polymorphisms that differentiate two groups of adult dialyzed ESRD patients, matched for age and gender, and with comparable values for dialysis dose and daily protein intake. These two groups consist of one group of 20 adult, dialyzed patients with serum phosphate levels > 2.50 mM compared to another group of 20 adult, dialyzed ESRD patients with serum phosphate levels < 1.50 mM. The results of this study will allow to determine whether there is a relationship between extreme hyperphosphatemia and klotho gene polymorphisms in dialysed ESRD patients. ;
Time Perspective: Prospective
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