1,25(OH)2D3 and renal function. A controlled clinical study in normal elderly women

Area of Science:

• Endocrinology
• Nephrology
• Geriatrics

Background:

• Vitamin D is crucial for calcium homeostasis and bone health.
• The active form, 1,25(OH)2D3 (calcitriol), plays a key role in these processes.
• Its effects on renal function in healthy elderly individuals require further investigation.

Purpose of the Study:

• To evaluate the impact of 1,25(OH)2D3 supplementation on renal function in healthy elderly women.
• To assess changes in serum creatinine and serum calcium levels.

Main Methods:

• A 6-month controlled study involving 58 healthy 70-year-old Danish women.
• Participants were randomized to receive either 1,25(OH)2D3 (0.5 micrograms/day) or placebo, with both groups receiving 500 mg calcium/day.
• Serum creatinine and serum calcium levels were monitored throughout the study.

Main Results:

• Seven of 20 participants treated with 1,25(OH)2D3 experienced transient hypercalcemia, managed by dose adjustment.
• One participant in the placebo group developed mild hypercalcemia.
• A statistically significant increase in serum creatinine was observed in the 1,25(OH)2D3 group compared to the placebo group, persisting throughout the study.

Conclusions:

• 1,25(OH)2D3 treatment in normal, elderly women may have an adverse effect on renal function.
• Elevated serum creatinine levels indicate a potential negative impact on kidney function.
• Further research is warranted to understand the long-term renal effects of calcitriol in this population.