Clinical Trials

Open studies conducted by NIDDK Principal Investigators appear below. Study statuses may include the following:

  • Open: Recruiting - Currently recruiting participants and open to everyone who meets eligibility criteria.
  • Open: Active, Not Recruiting - Participants are receiving an intervention or being examined, however new participants are not being recruited or enrolled.
  • Open: Enrolling by Invitation - People in a particular population were selected in advance and invited to participate. The study is not open to everyone who meets the eligibility criteria.
  • Open: Available for Expanded Access - Patients who are not participants in the clinical study may be able to gain access to the drug, biologic, or medical device being studied.

Studies Seeking Patients

Rituximab Plus Cyclosporine in Idiopathic Membranous Nephropathy

Background: - Membranous nephropathy is associated with damage to the walls of the glomeruli, the small blood vessels in the kidneys that filter waste products from the blood. This damage causes leakage of blood proteins into the urine and is associated with low blood protein levels, high blood cholesterol values, and swelling of the legs. These problems can decrease or go away without treatment in about 25 percent of patients, but if they persist, some patients may experience impaired (or loss of) kidney function, blood vessel and heart disease, and a risk of forming blood clots in veins. - Kidney biopsies that show that antibodies have been deposited along the glomeruli suggest that specialized cells of the immune system, called B and T cells, are causing damage to the kidneys through their increased activity. To suppress the action of B and T cells and to decrease the harmful deposits in the kidneys, drug treatments are required. - Patients with membranous nephropathy are often treated with immunosuppressive drugs such as cyclosporine or cytoxan plus steroids that attempt to reduce or suppress the activity of the immune system, decrease antibody production, and reduce antibody deposits in the kidney. However, not everyone responds to these medications and the kidney disease can return in some patients when the drugs are stopped. Also, there are side effects associated with long term usage of these medications. Rituximab, a different immunosuppressant, has also been used for this purpose. Although cyclosporine and Rituximab have been used separately, they have not been tried in combination as a possible treatment for membranous nephropathy. Objectives: - To determine the safety and effectiveness of combining rituximab and cyclosporine to treat membranous nephropathy. Eligibility: - Individuals 18 years of age and older who have been diagnosed with membranous nephropathy based on a kidney biopsy done within the preceding 24 months, and who have had excess levels of protein in the urine for at least 6 months based on urine and blood tests. Design: - Potential participants will be screened with an initial clinic evaluation and full medical history. - Before the treatment, there will be a run-in period that will last up to 2 months. During this time, participants will be placed on a blood pressure lowering medication and will not take any other immunosuppressant medications. - Participants will visit the NIH clinical center for a baseline evaluation, four intravenous infusions of rituximab, and also at 1- to 6-month intervals throughout the study. - Active treatment period will involve a 6-month course of cyclosporine and a total of four doses of rituximab. Participants will take cyclosporine tablets twice daily, and have two infusions of rituximab given 2 weeks apart, After 6 months, the cyclosporine dose will slowly be decreased over several weeks and then completely discontinued. Participants will then receive another course (two doses 2 weeks apart) of rituximab, depending on results of blood work. - Participants will have frequent blood and urine tests performed to monitor the results of treatment and reduce the chance of side effects.

The trial is Open with a status of Recruiting.

Investigator: Meryl A Waldman, M.D.

Referral Contacts: Email: Lilian V Howard, C.R.N.P. Phone: (301) 594-0298

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Immune System Related Kidney Disease

Kidney diseases related to the immune system include, nephrotic syndrome, glomerulonephritis, membranous nephropathy, lupus nephritis, and nephritis associated with connective tissue disorders. This study will allow researchers to admit and follow patients suffering from autoimmune diseases of the kidney. It will attempt to provide information about the causes and specific abnormalities associated with autoimmune kidney disease. Patients with kidney disease as a result of their immune system, and patients with diseases of the immune system who may later develop kidney disease, will be potential subjects for this study. Patients will undergo a history and physical examination, and standard laboratory test to more closely understand the causes, signs, symptoms, and responses to medication of these diseases. Based on these evaluations the patients may qualify as candidates for other experimental studies. At any time these patients may be asked to submit blood or urine samples for further research.

The trial is Open with a status of Recruiting.

Investigator: Meryl A Waldman, M.D.

Referral Contacts: Email: Meryl A Waldman, M.D. Phone: (301) 451-6990

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Determination of Kidney Function

Much more about kidney disorders can be learned by determining kidney function. This research proposes to study the kidneys function by several parameters known as glomerular filtration rate (GFR), Renal Plasma Flow (RPF), and Glomerular Capillary Wall Permselectivity. The study will select patients suffering from different types of kidney diseases. These patients will be selected based on the presence of significant amounts of protein in their urine (proteinuria). Standard blood and urine tests are often unable to provide completely accurate information about the kidney. In order for researchers to have a more accurate idea of kidney function, they will use alternative tests. Test materials (para aminohippurate and inulin) will be injected into patients veins that provides information based on their filtration through the kidneys.

The trial is Open with a status of Recruiting.

Investigator: Meryl A Waldman, M.D.

Referral Contacts: Email: Meryl A Waldman, M.D. Phone: (301) 451-6990

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Studying Patients With Cystic Fibrosis and Other Pulmonary and Pancreatic Disorders

Cystic fibrosis is a disease that affects many parts of the body, particularly the lungs and pancreas. The main purpose of this study is to further understand the natural history, clinical presentation, and genetics of cystic fibrosis. Patients with cystic fibrosis will be asked to participate in this study by undergoing standard medical tests and procedures. Patients will have a history taken and have a physical examination as well as blood tests, and a sweat test (a test for cystic fibrosis of the pancreas in which electrolytes are measured in collected sweat). Patients may also be asked to provide samples of urine, stool, and sputum for additional tests. More complicated procedures such as bronchoscopy or bronchoalveolar lavage may be required for diagnosis, treatment, or research purposes. Patients will receive appropriate treatment with antibiotics, pancreatic enzymes, vitamins, physiotherapy, and other agents. Medications may be given by mouth or injected into a vein. This study will provide patients with information on the prognosis of the disease as well as recommendations for management of cystic fibrosis. In addition this study will provide information to researchers which may be useful in other studies of cystic fibrosis.

The trial is Open with a status of Recruiting.

Investigator: Milica S Chernick, M.D.

Referral Contacts: Email: Milica S Chernick, M.D. Phone: (301) 496-3434

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