Study of Autoimmune Lymphoproliferative Syndrome (ALPS)
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|ClinicalTrials.gov Identifier: NCT00001350|
Recruitment Status : Recruiting
First Posted : November 4, 1999
Last Update Posted : April 19, 2021
The purpose of the protocol is to allow for patients, and relatives of patients, who may have the newly described autoimmune lymphoproliferative syndrome, to be evaluated at the NIH Clinical Center. This evaluation will include blood and relevant tissue studies along with long-term clinical evaluations to define the biology, inheritance,clinical spectrum, and natural history of this syndrome. The aim of the research is to understand mechanisms involved in the development of expanded numbers of what is typically a rare population of immune cells (CD4-8-/TCRalpha/beta+ T cells, otherwise referred to as double negative T cells), and how these relate to the development of expanded numbers of immune cells and autoimmune (self against self) responses in patients with ALPS.
In some cases, we may proivide treatment related to ALPS. These treatments are consistent with standard medical practice.
Participants with ALPS will be invited to visit the NIH once a year or more frequently when clinically indicated for the next few years for clinicians and scientists to follow the course of their disease and to manage its complications. Knowledge gained from these studies provides important insights into the mechanisms of autoimmunity, the thymus gland, and the role that the immune system and genetics plays in ALPS.
Autoimmune lymphoproliferative syndrome is a rare disease that affects both children and adults. Each of these three words helps describe the main features of this condition. The word autoimmune (self-immune) identifies ALPS as a disease of the immune system. The tools used to fight germs turn against our own cells and cause problems. The word lymphoproliferative describes the unusually large numbers of white blood cells (called lymphocytes (stored in the lymph nodes and spleens of people with ALPS. The word syndrome refers to the many common symptoms shared by ALPS patients.
One of the causes of ALPS is defective apoptosis, or said another way, an individual has an abnormality in how well lymphocytes (immune cells) die when they are instructed to do so. It is normal for lymphocytes to disintegrate (e.g., die) when they have done their job. In people with ALPS and in some of their affected relatives, the genetic message for the cells to die is altered: the message is not received and the cells do not die when they should. As a result, people with ALPS develop an enlarged spleen, liver and lymph glands, along with a range of other problems involving white blood cell counts and overactive immune responses (autoimmune disease). Some patients have an increased risk of developing lymphatic cancers (lymphoma).
Provided is a description of eligible study candidates:
Any patient with ALPS, male or female and of any age. As a patient with ALPS, candidates must have:
- a medical history of an enlarged spleen and/or enlarged lymph nodes over an extended period of time (past and/or current).
- defective lymphocyte apoptosis, in vitro.
- greater than or equal to 1 percent TCR alpha/beta+CD4-8- peripheral blood T cells.
- Relatives (any age) of patients and normal controls (18-65).
- Healthy normal volunteers will also be enrolled to provide data on normal cell behavior for comparison with patients.
Additional information regarding ALPS and the research being conducted at the National Institutes of Health is available at the following World Wide Web (e.g., Internet) locations:
|Condition or disease|
|Benign Lymphoproliferative Disorder|
|Study Type :||Observational|
|Estimated Enrollment :||1000 participants|
|Official Title:||Study of the Immunopathogenesis, Natural History, and Genetics of Autoimmune Lymphoproliferative Syndrome (ALPS) Associated With an Expansion of CD4-8-/TCR Alpha/Beta+ T Cells|
|Actual Study Start Date :||May 13, 1993|
ALPS patients and relatives of all ages
- Elucidate the mechanism of immune-dysregulation leading to ALPS and develop targeted treatments [ Time Frame: Median follow up of 25 years ]Improvement of underlying immune-dysregulation
To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00001350
|Contact: Sharon F Webster||(202) firstname.lastname@example.org|
|Contact: V. Koneti Rao, M.D.||(301) email@example.com|
|United States, Maryland|
|National Institutes of Health Clinical Center, 9000 Rockville Pike||Recruiting|
|Bethesda, Maryland, United States, 20892|
|Contact: For more information at the NIH Clinical Center contact Office of Patient Recruitment (OPR) 800-411-1222 ext TTY8664111010 firstname.lastname@example.org|
|Principal Investigator:||V. Koneti Rao, M.D.||National Institute of Allergy and Infectious Diseases (NIAID)|