Abstract
Introduction: Hypercalciuria plays an important role in the pathogenesis of renal calculi. The role of vitamin D, parathyroid hormone (PTH), inflammatory markers highly sensitive C-reactive protein (hs-CRP) and interleukin-6 (IL-6) in the development of renal calculi has not well defined. Objectives: To assess the serum levels of vitamin D, PTH, hs-CRP and IL-6, urinary and serum calcium and phosphorus levels in patients with renal calculi and to compare these parameters with healthy controls Patients and methods: It was a cross-sectional study. About 41 confirmed renal calculi patients and 41 age and sex matched controls were recruited. Patients with malignancies, hyperparathyroidism, chronic disease, and patients taking vitamin D supplementations were excluded. Serum levels of 25(OH) vitamin D, i-PTH, hs-CRP, IL-6, calcium and phosphorous, 24 hours urine levels of calcium and phosphorus were estimated Results: There was a statistical significant difference in the serum levels of 25(OH) vitamin D (12.26 vs 19.61 ng/mL), i-PTH (75.5 vs. 33.5 pg/mL), hsCRP (5117.05 vs. 1721.87 ng/mL), IL-6 (13.49 vs. 1.47 pg/mL) calcium (11.5 vs. 9.4 mg/dL) and urinary calcium (370.5 vs. 342 mg/d) and phosphorous levels (1172 vs. 1432 mg/d) between the cases and the control. There was negative correlation between the levels of i-PTH and vitamin D (r = - 0.765) and positive correlation between i-PTH and hsCRP, IL-6, Serum calcium and urine calcium (r = 0.353, 0.340, 0.522, 0.501 respectively) Conclusion: There was vitamin D inadequacy and increased levels of PTH, IL-6 and C-reactive protein, calcium in patients with renal calculi when compared with healthy controls.
Highlights
Hypercalciuria plays an important role in the pathogenesis of renal calculi
The levels of iPTH (75.5 vs. 33.5 pg/mL), hsCRP (5117.05 vs. 1721.87 ng/mL), IL-6 (13.49 vs. 1.47 pg/mL) were significantly high in cases compared to controls
There was statistically significant difference in the levels of serum calcium, urinary calcium and phosphorous between cases and control but there was no significant difference in the level of serum phosphorus (Table 1)
Summary
The role of vitamin D, parathyroid hormone (PTH), inflammatory markers highly sensitive C-reactive protein (hs-CRP) and interleukin-6 (IL-6) in the development of renal calculi has not well defined. Objectives: To assess the serum levels of vitamin D, PTH, hs-CRP and IL-6, urinary and serum calcium and phosphorus levels in patients with renal calculi and to compare these parameters with healthy controls Patients and methods: It was a cross-sectional study. There was negative correlation between the levels of i-PTH and vitamin D (r = - 0.765) and positive correlation between i-PTH and hsCRP, IL-6, Serum calcium and urine calcium (r = 0.353, 0.340, 0.522, 0.501 respectively) Conclusion: There was vitamin D inadequacy and increased levels of PTH, IL-6 and C-reactive protein, calcium in patients with renal calculi when compared with healthy controls.
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