Active clinical trials for "Hyperparathyroidism"

The purpose of this study is to obtain data on the safety and effectiveness of Zemplar® (paricalcitol) injection and paricalcitol capsules in real-life clinical practice. Participants, who have been treated with paricalcitol in-label in an everyday setting, have been included into this study. A period of 12 months has been chosen in order to also obtain experience on the maintenance dose and treatment optimization with paricalcitol injection and paricalcitol capsules in long-term use.

People with heart failure may have low magnesium and low vitamin D levels. They may also have abnormally high levels of parathyroid hormones. Magnesium and vitamin D are important chemicals that are not routinely measured in blood tests. We are studying how many people with heart failure have low levels of magnesium and vitamin D. We are also studying how many people with heart failure have overactive parathyroid glands and if that is related to their vitamin D levels.

Patients with end stage renal disease often have secondary hyperparathyroidism due to high phosphorus and low calcium levels in the blood. Preliminary animal studies and our initial human study indicate that the parathyroid hormone levels may change quickly based on the ingestion of phosphorus, prior to any change in the blood levels of calcium or phosphorus. This follow-up study will attempt to determine if the effect is independent of an increase in the blood glucose level. If so, this would suggest an as yet unidentified gastrointestinal receptor that mediates parathyroid hormone levels. This may affect the timing of administration and the type of phosphate binder used in treating patients with secondary hyperparathyroidism. The knowledge that parathyroid hormone levels can change acutely may also affect the recommended timing of blood samples

Since 2007, the cost of sequencing a diploid human genome has fallen dramatically, from approximately $70 million to $20,000. As affordable sequencing platforms become more widely available, the advancement of biomedical science will draw increasingly on whole genome sequencing research requiring large cohorts of diverse populations. Key policy, ethical and legal implications of these developments will need to be understood in order to promote the efficacy and effectiveness of genomic research going forward. An overall aim of this project is to obtain feedback on the informed consent process from some of the earliest particpants in studies using whole genome sequencing. A more specific goal is to characterize the salient personal and public references accessed by participants around the time of the informed consent process. By highlighting trends in participants views about study participation around the time of the initial informed consent process, we aim to advance the development of an ethically and socially relevant vocabulary with which to negotiate future terms of use for personal sequence data in genomic research. Participants will be asked to complete a one-time, semi-structured telephone interview lasting approximately 45 minutes in the period 2-8 weeks following their initial informed consent session at the NIH. They will be recruited from two NIH protocols employing whole genome sequencing for distinct purposes. They The ClinSeqTM Study is a large-scale medical sequencing project investigating the causal role of genetics in cardiovascular disease enrolling both symptomatic and healthy individuals. The Whole Genome Medical Sequencing for Gene Discovery Study (WGMS) enrolls children and adults for full sequencing with the aim of discovering the genetic etiology of rare conditions.

The purpose of the study is to evaluate the long term vascular morbidity and mortality in kidney transplant recipients based on one year post transplant levels of intact parathyroid hormone.

This study will evaluate whether commonly used blood pressure medications called "ACE inhibitors" can lower parathyroid hormone.

The main purpose of this research study is to evaluate the effectiveness of a minimally invasive surgical approach to removing parathyroid gland(s). The researchers are also interested in analyzing abnormal parathyroid tissue for changes in genes and proteins that may contribute to overactive parathyroid gland(s).

The impact of parathyroidectomy (PTX) on the bone mineral parameters in dialysis patients with secondary hyperparathyroidism (SHPT) remains unclear. The investigators performed this study to present the short- and long-term impact of PTX on calcium, phosphorus and intact parathyroid hormone control in dialysis patients with severe SHPT after operation. In particular, the investigators evaluate the impact based on the achievement of recommendations of the current clinical practice guidelines for bone and mineral parameters in dialysis patients after PTX.

This clinical trial studies the omission of intact parathyroid hormone testing during surgery in treating patients with primary hyperparathyroidism. Omission of intact parathyroid hormone testing during parathyroid gland removal may help patients with primary hyperparathyroidism to decrease their time under anesthesia, and decrease the overall time and cost of surgery.

Chronic kidney disease (CKD) patients often have associated systemic hypertension due to volume retention, as one of the mechanisms, therefore the use of diuretics is widespread in this population. One of the major complications of CKD is mineral and bone metabolism disorder (CKD-MBD), which include changes in the levels of calcium, phosphorus, vitamin D deficiency, increased circulating levels of fibroblast growth factor (FGF-23) and parathyroid hormone (PTH). These alterations are responsible for fractures, cardiovascular disease and mortality among patients with CKD. According to diuretic mechanism of action, sometimes increasing serum calcium (in the case of furosemide), sometimes decreasing it (in the case of thiazide), it is expected that the serum calcium may be altered, even within the range of normality, with consequent impact on the levels of PTH. Although most studies have shown that the use of thiazide diuretics decreases the risk of fractures, some showed the opposite. Similarly, although most studies have shown increased risk of fracture in association to loop diuretics use, some have failed in demonstrated this outcome. Only one study, a cohort study in a population of CKD, showed that furosemide was directly related to increased calciuria and PTH levels and the use of thiazide, in turn, showed completely opposite effect. However, certain issues are still not completely solved, for example, the interference of renal function itself on calciuria. It is possible that calciuria is not a so simple explanation that justifies the PTH levels changes, as no correlation was seen between calciuria and PTH levels. Better understanding of the exact relationship between the use of diuretics and the impact on CKD-MBD may be an alternative intervention, easily accessible and relatively inexpensive. The purpose of this study is to evaluate the impact of diuretic, specifically hydrochlorothiazide and furosemide, on bone architecture and mineral metabolism.