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This study was performed to determine whether calcitriol provides a therapeutic advantage to alfacalcidol for treatment of secondary hyperparathyroidism in ESRD patients.
Secondary hyperparathyroidism has a significant impact on morbidity and mortality in advanced chronic kidney disease (CKD).Both nonselective and selective vitamin D receptor activators (VDRAs) are demonstrated in many studies for their efficacy on suppression of PTH. Most of them are quite expensive and unavailable in many countries. Calcitriol and alfacalcidol are less expensive and worldwidely distributed. There is only one short-term study which directly compares these two drugs. This study demonstrates that calcitriol is superior to alfacalcidol. However, alfacalcidol is a prohormone of calcitriol. It has to be converted by 25-hydroxylase at the liver to generate 1,25-dihydroxyvitamin D3 to act on target cells. Many pharmacokinetics studies demonstrate that alfacalcidol has lower AUC compared to calcitriol if they are administered in the same dose. Therefore, the authors hypothesize that alfacalcidol may be equivalently efficacious as calcitriol if its dose is adjusted according to the pharmacokinetics studies.
Allocation: Randomized, Control: Active Control, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Crossover Assignment, Masking: Single Blind (Investigator), Primary Purpose: Treatment
alfacalcidol and calcitriol
Siriraj Medical School
Published on BioPortfolio: 2014-08-27T03:14:00-0400
Primary objective was to evaluate the efficacy between daily and pulse oral alfacalcidol treatment of SHPT in chronic hemodialysis patients, a 12-week treatment. Secondary objective was to...
The purpose of this study is to determine whether oral paricalcitol is safer and more efficacious compared to oral calcitriol in the treatment of hyperparathyroidism in chronic kidney dise...
Secondary Hyperparathyroidism (SHPT) occurs in many patients with kidney disease and leads to bone disease. Active forms of vitamin D, calcitriol and paricalcitol, treat SHPT, but may have...
There are still no established protocols for maintenance therapy with intravenous or oral vitamin D preparations after the iPTH target has been achieved. Therefore, the present study comp...
The primary objective of this study is to evaluate the efficacy and safety of paricalcitol in moderate to severe SHPT subjects under hemodialysis who are calcitriol-resistant.
To observe the clinical outcome and the effect of bone metabolism of cinacalcet combined with calcitriol in maintenance hemodialysis (MHD) patients with severe secondary hyperparathyroidism (SHPT).
Hyperparathyroidism is associated with hypercalcemia and the excess of parathyroid hormone secretion. However, the alterations in molecular pattern of functional genes during parathyroid tumorigenesis...
Secondary hyperparathyroidism (SHPT) occurs in patients with chronic renal failure complicated with renal bone disease and soft tissue/vascular calcification. In dialysis patients with severe SHPT, me...
Hyperparathyroidism is a common endocrine disorder. Parathyroidectomy is indicated for primary and tertiary hyperparathyroidism. Parathyroid adenoma is the cause in close to 85% of cases of primary hy...
The interplay between vitamin D and parathyroid hormone (PTH) represents one of the most important metabolic mechanisms of regulation of the calcium/phosphorus homeostasis. Secondary hyperparathyroidi...
A condition of abnormally elevated output of PARATHYROID HORMONE (or PTH) triggering responses that increase blood CALCIUM. It is characterized by HYPERCALCEMIA and BONE RESORPTION, eventually leading to bone diseases. PRIMARY HYPERPARATHYROIDISM is caused by parathyroid HYPERPLASIA or PARATHYROID NEOPLASMS. SECONDARY HYPERPARATHYROIDISM is increased PTH secretion in response to HYPOCALCEMIA, usually caused by chronic KIDNEY DISEASES.
Proteins, usually found in the cytoplasm, that specifically bind calcitriol, migrate to the nucleus, and regulate transcription of specific segments of DNA with the participation of D receptor interacting proteins (called DRIP). Vitamin D is converted in the liver and kidney to calcitriol and ultimately acts through these receptors.
Abnormally elevated PARATHYROID HORMONE secretion as a response to HYPOCALCEMIA. It is caused by chronic KIDNEY FAILURE or other abnormalities in the controls of bone and mineral metabolism, leading to various BONE DISEASES, such as RENAL OSTEODYSTROPHY.
Decalcification of bone or abnormal bone development due to chronic KIDNEY DISEASES, in which 1,25-DIHYDROXYVITAMIN D3 synthesis by the kidneys is impaired, leading to reduced negative feedback on PARATHYROID HORMONE. The resulting SECONDARY HYPERPARATHYROIDISM eventually leads to bone disorders.
The physiologically active form of vitamin D. It is formed primarily in the kidney by enzymatic hydroxylation of 25-hydroxycholecalciferol (CALCIFEDIOL). Its production is stimulated by low blood calcium levels and parathyroid hormone. Calcitriol increases intestinal absorption of calcium and phosphorus, and in concert with parathyroid hormone increases bone resorption.
Nephrology - kidney function
Nephrology is a specialty of medicine and pediatrics that concerns itself with the study of normal kidney function, kidney problems, the treatment of kidney problems and renal replacement therapy (dialysis and kidney transplantation). Systemic conditions...