Active clinical trials for "Hyperparathyroidism, Secondary"

Obese persons are known to have elevated levels of parathyroid hormone (PTH) and low levels of vitamin D. These hormones are important in regulation of the body's calcium stores and bone health. We would like to investigate these abnormalities and the accuracy of our current diagnostic tests by comparing results of standard assays for vitamin D and PTH to more specific tests, in obese subjects at baseline and as vitamin D is replaced. We will also compare two standard vitamin D replacement regimens to determine if one is more effective. This is a pilot study with two parts: Part 1 will compare levels of PTH and vitamin D using two different assays in obese subjects who have normal vitamin D and those who do not. We plan to enroll 20 subjects who have normal vitamin D levels and 40 subjects who have vitamin D insufficiency. All subjects will fill out questionnaires about the amount of calcium and vitamin D in their diet, and their recent sunlight exposure. We will ask for blood samples so that we can measure levels of calcium, vitamin D, albumin, creatinine, glucose, insulin and the different forms of PTH. Subjects who have vitamin D insufficiency will then be randomized to receive Vitamin D2 or Vitamin D3 in standard doses for eight weeks, in an open label trial. At four and eight weeks, these subjects will fill out the above questionnaires and have the blood tests repeated. For safety purposes, urine calcium will also be monitored.

The purpose of this study is to evaluate the efficacy and safety of KHK7580 orally administered once daily for 30 weeks in subjects with secondary hyperparathyroidism (SHPT) receiving hemodialysis in a randomized, double-blind, intra-subject dose-adjustment, parallel-group design with cinacalcet hydrochloride as an active control.

This long-term study is designed to evaluate safety and efficacy of KHK7580 orally administered once daily for 52 weeks for patients with secondary hyperparathyroidism receiving hemodialysis.

This study is designed to evaluate efficacy and safety of KHK7580 orally administered once daily for 32 weeks for patients with secondary hyperparathyroidism receiving peritoneal dialysis. After 32-week treatment period, the subjects will receive KHK7580 in the 20-week extension period to evaluate long-term safety and efficacy.

The purpose of the study is to evaluate the effects of two phosphate binders, PhosLo and sevelamer, on heart calcification in dialysis patients. The study will use a non-invasive technique, electron beam computed tomography (CT) scanning, to measure calcium in the coronary arteries, the aortic valve, and the mitral valve.

The purpose of this research is to study the efficacy and safety of AMG 073 in patients with kidney failure who are being treated with hemodialysis or peritoneal dialysis and who also have secondary hyperparathyroidism (HPT).

This study is designed to test whether calcium supplementation alone or calcium plus vitamin D reduces the incidence of fractures, reduces high parathyroid secretory activity, and halts bone loss in a population-based sample of women 55+ years of age. A calcium supplement of 1400 mg/d will significantly reduce the cumulative incidence of spine and appendicular fractures over four years for independently living, rural women 55 years of age and older compared to similar women on their usual diets. A calcium supplement of 1400 mg/d plus 1100 IU vitamin D/d will significantly reduce the cumulative incidence of spine and appendicular fractures compared to a calcium supplement only.

The purpose of this study is to evaluate whether cinacalcet + low dose vitamin D attenuates the progression of vascular calcification over one year, compared with a treatment regimen that includes flexible vitamin D dosing in the absence of cinacalcet, in subjects with chronic kidney disease receiving hemodialysis

Recently, an increase in the prevalence of hyperparathyroidism and hypovitaminosis D in postmenopause women has been occurring in Mexico and the world. Chronic exposure to the parathyroid hormone (PTH) is catabolic for the bone, worsening the state of osteoporosis. However, it is unclear whether these conditions could significantly improve bone mineral density (BMD). In the present work, it was shown that the resolution of hyperparathyroidism in postmenopausal women improves osteoporosis.

The purpose of this study was to investigate the initial dose and dose adjustment range for paricalcitol injection in patients with chronic kidney disease on hemodialysis who have secondary hyperparathyroidism.