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We list hundreds of Clinical Trials about "Phosphorus Launches Diagnostic Ophthalmology Drug Response Genetic Tests" on BioPortfolio. We draw our references from global clinical trials data listed on ClinicalTrials.gov and refresh our database daily.
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We have conducted the study about the effects of normal diet and low-phosphorus diet on phosphorus homeostasis in healthy subjects, now this study is designed to explore further about the effect of high-phosphorus diet on phosphorus homeostasis.
Osteoporosis causes bones to weaken and break more easily. Calcium and phosphorus are two minerals that are essential for normal bone formation. Unfortunately, calcium salts commonly prescribed in anti-osteoporosis treatment bind phosphorus from food and restrict phosphorus available for bone building. Teriparatide is a drug that reduces the risk of fractures by increasing bone thickness and strength. Vitamin D is also necessary for strong bones and teeth. The purpose of this s...
RATIONALE: Radioactive drugs such as phosphorus 32 may be able to kill tumor cells. PURPOSE: This phase I trial is studying the side effects and best dose of phosphorus 32 in treating patients with glioblastoma multiforme.
The purpose of this study is to determine the effects of different amounts of phosphorus in the diet on hormones that control phosphorus and bone health both in men who are healthy and in ones who have moderate kidney disease.
The study aim at: Investigating the impact of phosphorus ingestion on DIT of lean and obese subjects consuming high carbohydrate meal. Investigating the impact of phosphorus ingestion on DIT of lean and obese subjects consuming high protein-low phosphorus meal.
This study will explore the regulation of fibroblast growth factor-23 (FGF-23). It is a hormone recently identified as a regulator of the blood levels of phosphorus and vitamin D, both of which are essential for overall health and especially important for bone health. The parathyroid hormone (PTH) regulates phosphorus and calcium, but people with hypoparathyroidism or pseudohypoparathyroidism do not have sufficient PTH action. There are genetic diseases that influence FGF-23, c...
The objective of this project is to develop a non-invasive prenatal diagnostic test for trisomy 21 which is reliable, sensitive and cost-effective, and thus, offers an alternative to the currently employed invasive diagnostic tests amniocentesis and chorionic villus sampling. Current prenatal screening methods (blood markers and ultrasound) for trisomy 21 (Down syndrome) detect about 90 % of cases and have a false positive rate of > 90 %. The results of these tests are e...
The aim of the trial is to investigate the effect of ingestion of 75g of glucose (with or without phosphorus) on diet induced thermogenesis (using indirect calorimetry) and appetite (using visual analogue scales) in lean and obese healthy subjects
Patients on hemodialysis tend to have chronic elevations in the level of phosphorus in the blood and a secondary increase in the iPTH level. This chronic elevation in iPTH can have adverse consequences, thus a variety of phosphate binders are given in an attempt to decrease the absorption of phosphorus present in the normal diet. Some preliminary studies have indicated that the iPTH level may change based on the amount of phosphorus present in a meal prior to any significant ...
Because people infected with HIV strains that are resistant to anti-HIV drugs have fewer effective treatment options, selecting an effective anti-HIV drug combination is difficult. A combination of protease inhibitors (PIs), when added to a patient's current anti-HIV therapy, may decrease viral load and increase drug activity. Tests that measure drug levels in the blood and tests to evaluate the drug resistance of HIV may also be helpful in choosing the best anti-HIV drug comb...
This is a research study for people with high blood phosphorus levels who are on dialysis. This medical condition can cause weakening of the bones and damage other organs. This can lead to many health problems, and sometimes death. Phosphorus is in much of the food we eat, and is helpful to us in small amounts. Patients with kidney failure have trouble getting rid of the phosphorus eaten in food. Dialysis can help remove some of the phosphorus, but often patients must take ...
The IRIS™ Registry (Intelligent Research in Sight) is the nation's first comprehensive eye disease clinical registry. The American Academy of Ophthalmology is developing it as part of the profession's shared goal of continual improvement in the delivery of eye care.The IRIS Registry will be a centralized system for ophthalmology practices to promote practice innovations and achieve clinical excellence.
Chronic kidney disease (CKD) affects approximately 26 million Americans with many more at risk for disease development. Elevated serum phosphorus (P) and related abnormalities in P homeostasis due to progressive loss of kidney function are primary driving forces behind cardiovascular dysfunction and mortality in CKD patients. Intestinal P absorption is an critical aspect in P homeostasis but has been understudied, particularly in the early stages of CKD progression. This study ...
This study will explore the clinical and hereditary (genetic) features of inherited cataracts. A cataract is a clouding of the eye lens, which focuses light on the back of the eye. When the lens becomes cloudy and does not let light through, vision is impaired. Cataracts may be associated with vision problems alone, or with other problems, such as changes in facial appearance or skin problems. A better understanding of these genetic conditions may help in the development of ...
The study determines the diagnostic performance and cost of rapid diagnostic tests (RDTs) performed on human African trypanosomiasis clinical suspects in peripheral health centres, whether or not followed by serological and/or molecular tests on dried blood spots done at regional reference centres
Evaluation of the calcifying effect of phosphorus on vascular smooth muscle and detect the association between serum phosphorus and valvular and vascular calcification in end stage renal disease patients
The investigators aim to study potential racial differences in renal phosphorus handling by provocatively testing urinary phosphorus excretion using parathyroid hormone infusions in healthy white volunteers compared to healthy black volunteers.
Hyperphosphatemia is related to the increase in morbidity and mortality. There is greater risk for cardiovascular disease, atherosclerotic disease, secondary hyperparathyroidism, and bone disease . The serum phosphorus level can be controlled by a combination of factors, such as: reduction of ingestion, reduction of intestinal absorption with chelating agents and increase in elimination by dialysis. The purpose of this study is to evaluate the effect of dietary interven...
Background: People s genetic markers and other genetic characteristics can affect their response to drug therapy. Researchers want to screen people for these markers and characteristics. They want to do this before the people are screened for studies at the National Cancer Institute. That should save time that can be lost when people go through the whole screening for a study only to find out they cannot join. The data collected may also be used to select the proper dose...
The purpose of this study is to learn more about how the kidneys control the blood levels of phosphorus in patients with early chronic kidney disease. The ultimate goal is to use this information to design improved treatment strategies for phosphorus-related problems for the millions of patients with chronic kidney disease.
RATIONALE: Drugs used in chemotherapy use different ways to stop tumor cells from dividing so they stop growing or die. Radiation therapy uses high-energy x-rays to damage tumor cells. Drugs such as phosphorus-32 may make the tumor cells more sensitive to radiation therapy. Chemotherapy combined with radiation therapy and phosphorus-32 may kill more tumor cells. PURPOSE: Phase I trial to study the effectiveness of phosphorus-32 plus radiation therapy and chemotherapy in ...
Phosphorus is a substance in the blood that comes from food and is normally cleared from the body by the kidneys. In patients with kidney disease, excess phosphorus may build up in the body as you eat. This leads to problems with bones and blood vessels over time. In this study, we will compare the blood and urine before and after eating one week of a diet with a protein from plants (soy and grains) and before and after another one week of diet with protein from animals (meat a...
The investigators would like to study the role of phosphorus metabolism in the development of certain hormonal problems in people with chronic kidney disease. More specifically, the goals of the research are (1) to understand the cause of hyperparathyroidism - a hormone problem that often develops in patients who have kidney disease and (2) to test whether decreasing phosphorus intake could help improve or prevent hyperparathyroidism.
Pravastatin (Pravachol) is approved by the Food and Drug Administration (FDA) and is used to treat high cholesterol. Darunavir (Prezista) and ritonavir (Norvir) are approved by the Food and Drug Administration (FDA) to treat HIV infection. When darunavir and ritonavir are given with pravastatin, they can increase the blood levels of pravastatin. The degree of this interaction varies from person to person. The way that darunavir and ritonavir interact with pravastatin may be...
FGF-23 is a newly described protein that is an important regulator of phosphorus in the body. This protein increases in people with kidney disease and people who need dialysis have very high levels of FGF-23 in the blood. However, although some studies have indicated that FGF-23 levels go up with increased intake of phosphorus, no one knows if FGF-23 levels can be lowered in patients with kidney disease by preventing them from absorbing phosphorus from food. This study is de...