Clinical trials: Natural History
Age-Related Macular Degeneration
Dark Adaptation in Participants With Age-Related Macular Degeneration
Background: Macular degeneration can cause permanent loss of central vision. This vision is important for seeing details. Age-related macular degeneration (AMD) is the leading cause of vision loss in people over 55 in the United…
- Trial name
- NCT03225131
- Where
- United States
- Volunteers
- 57 people
- Sponsor
- National Eye Institute (NEI)
Retinal Hemangioblastoma, Von Hippel-Lindau Disease
Retrospective Case Series of Trans-scleral Cryotherapy for Retinal Hemangioblastoma
Background: Retinal hemangioblastoma (RH) is a tumor. It grows from the retina in the eye. It can threaten a person s vision. Trans-scleral cryotherapy is used to destroy the tumors and minimize the long-term risks of vision…
- Trial name
- NCT04458935
- Where
- United States
- Volunteers
- 25 people
- Sponsor
- National Eye Institute (NEI)
Evaluation of Plasma Lipoproteins
Evaluation of Lipoproteins
Lipoproteins are particles that carry fats such as cholesterol and triglycerides through the blood stream. These particles are involved in causing blood vessel disease that can lead to conditions like hardening of the arteries…
- Trial name
- NCT00001168
- Testing
- Balanced diet
- Where
- United States
- Volunteers
- 1,017 people
- Sponsor
- National Heart, Lung, and Blood Institute (NHLBI)
Aspartylglucosaminuria, Aspartylglucosamidase (AGA) Deficiency
A Natural History Study of Aspartylglucosaminuria
Aspartylglucosaminuria (AGU) is a rare neurodegenerative lysosomal storage disease (LSD) characterized by developmental delay, psychomotor regression, worsening intellectual disability, gait disturbance and, ultimately, premature…
- Conditions
- Aspartylglucosaminuria, Aspartylglucosamidase (AGA) Deficiency, Lysosomal Storage Diseases
- Trial name
- AGU (NCT03853876)
- Where
- United States
- Volunteers
- 8 people
- Sponsor
- Neurogene Inc.
Neurogenetic Disorders
Neurogenetics Patient Registry
The objective of this project is to develop a Neurogenetics patient database and bio repository - which includes clinical information regarding history, physical examination, laboratory testing including genetic testing (NextGen…
- Trial name
- NCT02995538
- Where
- United States
- Volunteers
- 1,000 people
- Sponsor
- University of Pittsburgh
Rapid Eye Movement Sleep Behavior Disorder
RBD Longitudinal as Prognostic for PD
Purpose - to validate a combination of biological and clinical markers in the rapid-eye-movement (REM) sleep behavior disorder (RBD) population as indicative of the pre-symptomatic stage of Parkinson's disease (PD).
- Trial name
- RBD6YR (NCT00817726)
- Where
- United States
- Volunteers
- 164 people, healthy volunteers welcome
- Sponsor
- The University of Texas Health Science Center, Houston
Gastric Acid Secretory Disorders
A New Method for Determining Gastric Acid Output Using a Wireless Capsule
Background: Acid-related gastrointestinal disorders are numerous and may require chronic treatment and maintenance, but they are often difficult to diagnose and treat.
- Trial name
- NCT00702533
- Testing
- Pentagastrin Injection BP, Pentagastrin
- Where
- United States
- Volunteers
- 80 people
- Sponsor
- National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
Fibrodysplasia Ossificans Progressiva
A Natural History Study of Fibrodysplasia Ossificans Progressiva (FOP)
Fibrodysplasia Ossificans Progressiva (FOP) is a rare, severely disabling disease characterized by painful, recurrent episodes of soft tissue swelling (flare-ups) that result in abnormal bone formation in muscles, tendons, and…
- Trial name
- NCT02322255
- Where
- 7 sites in United States, Argentina and 4 more
- Volunteers
- 114 people
- Sponsor
- Clementia Pharmaceuticals Inc.
Immunohematology
Molecular Immunohematology in Ethiopian Sub-Populations
Alloimmunization to blood products in transfused patients is a recognized management challenge in the clinical setting. In particular the ethnic and racial specificity of RBC antigens and the limited availability of matched…
- Trial name
- NCT01282021
- Where
- Ethiopia
- Volunteers
- 95 people
- Sponsor
- National Institutes of Health Clinical Center (CC)
Urticaria Pigmentosa
Natural History of Urticaria Pigmentosa in Children
The purpose of this study is to determine how long the skin lesions usually last and what kind of symptoms and signs children with urticaria pigmentosa may develop over the years.
- Trial name
- UP (NCT00467792)
- Where
- United States
- Volunteers
- 47 people
- Sponsor
- Medical College of Wisconsin
Glaucoma, Healthy
Cause of Pigment Dispersion Syndrome
The purpose of this study is to learn how pigment is released from the iris (the colored part of the eye) in patients with pigment dispersion syndrome.
- Conditions
- Glaucoma, Healthy, Pigment Dispersion Syndrome
- Trial name
- NCT00005919
- Where
- United States
- Volunteers
- 90 people, healthy volunteers welcome
- Sponsor
- National Eye Institute (NEI)
Usher Syndrome, Type 2A, Retinitis Pigmentosa
Characterizing Rate of Progression in USHer Syndrome (CRUSH) Study
Mutations in USH2A give rise to two phenotypes: Usher syndrome type 2a (USH2A) and nonsyndromic RP (USH2A associated nsRP). Usher syndrome is the most common form of congenital deafblindness.
- Conditions
- Usher Syndrome, Type 2A, Retinitis Pigmentosa, USH2A
- Trial name
- CRUSH (NCT04820244)
- Testing
- No intervention
- Where
- Netherlands
- Volunteers
- 36 people
- Sponsor
- Radboud University Medical Center
Frontotemporal Dementia, Amyotrophic Lateral Sclerosis
Investigating Complex Neurodegenerative Disorders Related to Amyotrophic Lateral Sclerosis and Frontotemporal Dementia
Background: Neurodegenerative disorders can lead to problems in movement or memory. Some can cause abnormal proteins to build up in brain cells.
- Conditions
- Frontotemporal Dementia, Amyotrophic Lateral Sclerosis, Progressive Supranuclear Palsy
- Trial name
- NCT03225144
- Where
- United States
- Volunteers
- 360 people
- Sponsor
- National Institute of Neurological Disorders and Stroke (NINDS)
Eosinophilia, Hypereosinophilic Syndrome
A Longitudinal Study of Familial Hypereosinophilia (FE): Natural History and Markers of Disease Progression
Eosinophils are a type of white blood cell. Elevated eosinophil levels can damage the heart, nerves, and other organs, in the syndrome known as hypereosinophilic syndrome (HES).
- Trial name
- NCT00091871
- Where
- United States
- Volunteers
- 50 people, healthy volunteers welcome
- Sponsor
- National Institute of Allergy and Infectious Diseases (NIAID)
Sickle Cell Disease
Dietary Intake and Dietary Behaviors in Adults With Sickle Cell Disease
Background: Sickle Cell Disease (SCD) causes blood cells form a crescent shape. It is caused by a genetic mutation in the hemoglobin gene.
- Trial name
- NCT05170412
- Where
- United States
- Volunteers
- 80 people
- Sponsor
- National Institutes of Health Clinical Center (CC)
Energy Expenditure
Quantifying the Persistence of Metabolic Adaptation and Weight Regain Following Extreme Weight Loss
Background: Many people regain the weight they lose through diet and exercise. This might happen because the weight loss slows their metabolism. This slowing is called metabolic adaptation.
- Trial name
- NCT02544009
- Where
- United States
- Volunteers
- 15 people
- Sponsor
- National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
Complication of Peritoneal Dialysis
Natural History of Mineral Metabolism Parameters and Protein-bound Toxins in Incident Peritoneal Dialysis Patients
The aims of this study are 1. To evaluate the natural history of plasma concentrations and renal and peritoneal clearances of small water-soluble uremic retention molecules (URM), 'middle molecules', and protein bound URM in…
- Trial name
- NCT01306149
- Where
- Belgium
- Volunteers
- 96 people
- Sponsor
- Universitaire Ziekenhuizen KU Leuven
Prostate Cancer, Breast Cancer
Collection of Blood From Patients With Cancer, Other Tumors, or Tumor Predisposition Syndromes for Genetic Analysis
Background: Some genes may be associated with a greater chance of side effects during cancer treatment. These genes may also make certain treatments less effective.
- Conditions
- Prostate Cancer, Breast Cancer, Lung Cancer, Ovarian Cancer
- Trial name
- NCT01441089
- Where
- United States
- Volunteers
- 1,100 people
- Sponsor
- National Cancer Institute (NCI)
Blood Donors, Apheresis
Collection and Distribution of Blood Components From Healthy Donors for In Vitro Research Use
Background: Many different research projects need a steady supply of human blood. Blood donated by screened, healthy people may be used to test new drugs, for example, or to learn how blood cells work.
- Trial name
- NCT07877259
- Where
- United States
- Volunteers
- 5,000 people, healthy volunteers welcome
- Sponsor
- National Institutes of Health Clinical Center (CC)
Ovarian Cancer, Primary Peritoneal Cancer
Collection of Malignant Ascites, Pleural Fluid, and Blood From People With Solid Tumors
Background: Researchers want to study fluids and blood of people with cancer. The fluids are from the abdomen and around the lungs. Studying these might help researchers learn about the biology of cancer.
- Conditions
- Ovarian Cancer, Primary Peritoneal Cancer, Fallopian Tube Cancer, Cancer
- Trial name
- NCT03189108
- Where
- United States
- Volunteers
- 22 people
- Sponsor
- National Cancer Institute (NCI)
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