Active clinical trials for "Cystinosis"

Classification of activity tolerance is of importance in chronic progressive myopathies, not only to better understand functional implications of the disease state itself, but also for purposes of exercise prescription for health maintenance. Maximal exercise testing has been considered as the gold standard of assessing maximal aerobic capacity, however testing in individuals with neuromuscular disease is often limited due to pain, activity intolerance, musculoskeletal impairments, fatigue and other such related variables. Often, submaximal exercise testing can overcome some of these obstacles, and as such, is used frequently in the clinical environment. Non-ambulatory exercise testing utilizing an arm ergometer specifically has not been studied as heavily, especially in those with progressive myopathies. For this study, we will use maximal aerobic capacity testing for individuals with Cystinosis Myopathy utilizing a bike ergometer to allow testing of individuals regardless of their ambulatory status.

This study will examine whether the tendency to have thrombosis, or the formation of blood clots inside blood vessels, has a role in the development of pseudotumor cerebri (PTC). PTC causes symptoms and signs of isolated elevated blood pressure in the cranium, or covering of the brain. The disorder can lead to significant, negative effects on the visual system. Increased pressure of the cerebrospinal fluid, that is, fluid around the brain, is a factor, but the cause of the disorder is not clear. There has been documentation of clustering of PTC within families. It suggests that potential genetic polymorphisms-abilities to take on different forms-may become evident after exposure to conditions known to trigger PTC. Thrombosis comes about by interactions between genetic and environmental or acquired factors, or both, resulting in a blood clot at a specific time and location. Because the disease occurs in episodes, the interaction of the genetic and nongenetic risk factors is important. Cystinosis is a recessive disorder caused by deposits of cystine within the lysosomes of cells-that is, sac-like cell parts that contain various enzymes. Involvement of the kidneys remains the primary characteristic, eventually leading to renal failure. Of all of the risk factors that make it easier for blood clotting, a high level of a substance called homocysteine is of particular interest. Too much homocysteine in blood plasma is a common finding in patients with kidney failure, and it has been recently identified as an independent risk factor for diseases of the blood vessels. Participants of all ages who meet the Dandy criteria for PTC may be eligible for this study. Pregnant women will be excluded. There will also be a control group of nephropathic cystinosis patients who do not have PTC. Participants will be asked to undergo the following tests and procedures: Medical history. Physical examination, to evaluate the eye and nervous systems. Collection of blood for DNA and other tests. Collection of cerebrospinal fluid, through a procedure called lumbar puncture or spinal tap. The evaluation of patients will generally last 3 to 4 days. For the collection of cerebrospinal fluid, the patient's skin on the back will be numbed with a local anesthetic. A special needle will be inserted into the back, and a small amount of the fluid will be drawn through the needle. There will be pain for a minute, although there can be a headache lasting 24 hours. Also, there may be bruising, local pain, bleeding, or infection where the needle enters. Patients may also have a magnetic resonance imaging scan of their head. During the MRI scan, patients will lie still on a table that slides in and out of a metal cylinder surrounded by a strong magnetic field. Patients will be able to communicate with the MRI staff at all times and may ask to be moved out of the machine at any time.

The purpose of this study is to determine the molecular mechanism of this disease and to research the relationship between cystinosis and skin phenotype.

This study will examine saliva samples from healthy volunteers and patients with various diseases to learn more about how disease affects the mouth and salivary glands. It will use a method called salivary proteomics to identify multiple proteins in saliva and discover if there are protein patterns unique to specific diseases. The study will: Characterize the salivary proteome in patients with Sjogren's syndrome, graft-versus-host disease, diabetes, sarcoidosis, cystinosis, dental caries, and immunodeficiencies and in patients who have had head and neck radiation Evaluate the possible use of salivary proteomics for early diagnosis Evaluate the potential use of salivary proteomics for prognosis and treatment Patients participating in NIH clinical studies who have Sjogren's syndrome, graft-versus-host disease, diabetes, sarcoidosis, cystinosis, dental caries, or an immunodeficiency, or patients undergoing head and neck radiation may be eligible for this study. Candidates are screened with a medical and dental history, head and neck examination, and photographs of any mouth sores or disease. Healthy volunteers also have blood drawn for routine laboratory testing. Participants have saliva collected from the floor of the mouth, the parotid salivary glands in the cheek, and the submandibular and sublingual salivary glands under the tongue. Patients with certain diseases also provide a urine sample. Saliva samples are collected as follows: One time from healthy volunteers and patients with Sjogren's syndrome, diabetes, sarcoidosis, cystinosis and immunodeficiencies Five times from patients undergoing stem cell transplant: at baseline before transplant and about 1, 2, 3 and 6 months after transplant. Three times from patients undergoing head and neck radiation: at baseline before radiation and at 3 and 6 months after the conclusion of radiation.

This study will test the effectiveness of a combination of anti-rejection medicines in preventing complications typically seen in cystinosis patients undergoing kidney transplants. Cystinosis is a rare disease affecting children that causes growth retardation and kidney failure. Kidney transplant is the standard treatment for kidney failure in these patients, followed by immunosuppression to prevent organ rejection. The standard drug regimen for immunosuppression includes steroids, which can lead to other serious complications. This study will look at combination therapy that does not include steroids. Patients 7 years of age and older with cystinosis who are candidates for a kidney transplant at the National Institutes of Health Clinical Center may be eligible for this 5-year study. Candidates will be screened with a medical history, physical examination, and blood tests. Participants will undergo the following tests and procedures: Kidney transplant: Patients undergo kidney transplant surgery under general anesthesia. Central line placement: A large intravenous catheter (plastic tube, or IV line) is placed in a vein in the chest or neck under local anesthesia before the transplant surgery. The line remains in place for some time during the hospitalization to administer immunosuppressive medications, antibiotics, and blood, if needed. The line is also used to collect blood samples. Leukapheresis: This procedure for collecting white blood cells is done before the transplant. The cells are studied to evaluate the patient's immune system. Whole blood is withdrawn through a catheter in an arm vein or through the central line and directed into a machine that separates the blood components by spinning. The white cells are removed and the red cells and plasma are returned to the body. Immunosuppressive medication following transplantation Adults receive thymoglobulin at the time of the transplant and for 3 days after surgery; mycophenolate mofetil daily after the transplant; tacrolimus twice a day once the kidney is working well; and sirolimus daily. Children receive daclizumab the day of the transplant, day 4 after surgery, and at weeks 2, 4, 6, 8, 11, 15, 19, and 23, and mycophenolate mofetil daily after the transplant. Follow-up visits: After discharge from the hospital, patients return to the Clinical Center for follow-up at 6 months, at 1 year, and then yearly for 5 years. A physical examination is done the first four visits, and blood and urine samples are collected at every visit. Kidney biopsies (removal of a small amount of kidney tissue through a thin needle) are done at 6 months, 1, 3, and 5 years after the transplant. The biopsied tissue is examined to evaluate how well the kidney is responding to the immunosuppression medicines, to determine whether more or less medication is needed, and to evaluate how the patient is responding to the donor kidney. Routine laboratory tests, coordinated by the patient's local physician, are done 2 to 3 times a week for the first 2 to 3 months after transplantation, then weekly for several more months, and at least monthly for life.

Development of a new mass spectrometry-based biomarker for the early and sensitive diagnosis of Cystinosis disease from the blood

OBJECTIVES: I. Establish a computerized databank to monitor the progress of patients with cystinosis treated with cysteamine. II. Track and monitor all patients including renal transplant, dialysis and post renal transplants.

OBJECTIVES: I. Classify renal tubular defects using clinical and biochemical findings in patients with Fanconi syndrome and cystinosis.

Cure Cystinosis International Registry (CCIR) is an online, patient self-identifying registry developed by medical and scientific experts specifically for the cystinosis community. CCIR's sole purpose is to identify people with cystinosis worldwide in an effort to accelerate novel treatments and a cure for cystinosis. CCIR provides a safe and secure platform for: sharing anonymous medical information about cystinosis with researchers, clinicians and patients disseminating information about research opportunities connecting researchers/investigators and prospective participants * Interested cystinosis patients may register themselves with CCIR online at http://www.cystinosisregistry.org. * No personal information is shared outside of CCIR. Individual identities are known only to appropriate CCIR staff. If a participant is matched to a clinical trial, the participant receives a notice from CCIR, after which they can decide whether they wish to contact the study sponsor.