An observational study in Immunodeficiency, sponsored by National Institute of Allergy and Infectious Diseases (NIAID). Completed at 1 site in United States. Open to participants aged 2 Years to 120 Years. Per ClinicalTrials.gov, last updated 2026-08-20.
Sponsored by National Institute of Allergy and Infectious Diseases (NIAID) · Observational
Background:
The immune system defends the body against disease. It has many different parts spread out in
the body, including in the blood and skin. To learn more about it, researchers want to study samples from people with healthy immune systems and people with conditions that affect how the immune system works.
Objective:
To learn about how the different parts of the immune system come together to make a whole.
Eligibility:
People age 2 and older who have a condition that affects the immune system or have a family member with such a condition.
Design:
Participants will be screened with medical and medicine review. Other lab tests may also be reviewed. Some participants will take a pregnancy test.
Participants will give blood samples. They may also give saliva, stool, and urine samples.
A sterile cotton swab may be rubbed over their skin or inside the cheek or nose to collect cells.
If participants have samples collected as part of their regular medical care, their doctor may be asked to send parts of the samples that otherwise would be thrown away. These samples may be from biopsies, endoscopies, or other procedures.
Some participants may have optional skin punch biopsies. For this, their skin is numbed. Then a tool removes 1 or 2 small pieces of skin from the forearm or thigh.
Participants medical records will be checked to see if they have any changes in their health over time. If they have a study visit, they may talk about their medical history and have a physical exam.
Participation lasts 5 years....
Immunological disorders predispose affected individuals to a myriad of complications, including infection, immune dysregulation with autoimmune disease and aberrant inflammatory responses, and malignancy. Advances in genetic testing have propelled the discovery of the genetic underpinnings of numerous immunodeficiencies. However, a more complete picture of the immune system is needed to better characterize patients that present with the signs and symptoms of immunodeficiency or immune dysregulation in whom there is no identifiable genetic diagnosis. Many of our diagnostic tools, such as characterization of cell subset frequencies, look at only one parameter in the immune system, which is typically insufficient to capture the system s complexity. Systems immunology is a field of research aimed to identify and understand how the different components of the immune system work together in a coordinated manner to achieve its functions, such as protecting against pathogens and mounting effective responses after vaccination. The goal of this study is to collect patient samples to more deeply phenotype these individuals at the molecular and cellular levels using novel technologies in order to generate hypotheses regarding disease etiologies and mechanisms in subjects with an immune disorder without complete characterization or clear genetic etiology. We also aim to validate a specific observation seen in a previous study of patients with known monogenic immunological disorders. In the long-term, hypotheses generated in this study that address clinically significant, actionable questions will be pursued as separate investigations.
This hypothesis-generating sample collection study will recruit patients with unknown or incompletely characterized immune defects and their unaffected relatives. Under this protocol, samples will be collected at the NIH Clinical Center or mailed in for analysis using systems biology approaches to generate hypotheses regarding the potential etiologies and mechanisms of these immune defects. Initially, all subjects will give a blood sample and may give additional samples including saliva, stool, and skin punch biopsies. Subjects will be enrolled for 5 years and may be asked to give additional samples based on scientific need or changes in clinical status. Findings relevant to subjects health and medical care will be returned to them and referring healthcare providers.
698 studies on the registry are indexed under Immunologic Deficiency Syndromes; 67 are open to participants now.
This study's enrollment of 19 is below the median of 150 across 179 observational studies indexed under Immunologic Deficiency Syndromes.
Browse Immunologic Deficiency Syndromes studies →National Institute of Allergy and Infectious Diseases (NIAID) is the lead sponsor of 2,401 studies on the registry; 179 are open to participants now.
Of its 396 completed or terminated interventional studies of FDA-regulated products, 294 (74%) have results posted.
Counted across the registry records on this site, refreshed daily.
Study participants will be selected or referred to the protocol from other NIH groups whose patients have an uncharacterized immune defect. Unaffected biological relatives of these participants may also be recruited.
Aged greater than or equal to 2 years.
Meets 1 of the following criteria:
a. Patient with a suspected or known/molecularly defined but incompletely characterized immune disorder (as determined by a referring NIH study staff member) AND meeting at least one of the following:
i. within 1 year of screening, abnormal immune function demonstrated by at least one laboratory test result outside the normal range
ii. history of severe or atypical infection, immune dysregulation (defined as autoimmunity, lymphoproliferation, or HLH), or autoinflammatory symptoms (defined as episodic fever often associated with dermatitis, gastrointestinal symptoms, and arthropathy).
b. Biological unaffected relative of an individual meeting criterion 2a but who does not meet criterion 2a himself/herself. Unaffected relatives may be mother, father, siblings, children, grandparents, aunts, uncles, or first cousins to the individual.
EXCLUSION CRITERIA:
Individuals meeting any of the following criteria will be excluded from study participation:
Patients with uncharacterized immune defects
Unaffected biological relatives
CBC with differential, lymphocyte phenotyping, and whole blood RNA expression data analyzed in individuals with unknown or incompletely characterized immune defects.
CBC with differential, lymphocyte phenotyping, and whole blood RNA expression data analyzed in individuals with unknown or incompletely characterized immune defects.
Time frame: Baseline
CBC with differential and lymphocyte phenotyping in individuals with unknown or incompletely characterized immunological defects compared with age- and gender-matched healthy control
CBC with differential and lymphocyte phenotyping in individuals with unknown or incompletely characterized immunological defects compared with age- and gender-matched healthy control
Time frame: Baseline
Plan to share: No
This study is completed, as verified in Aug 2026. You cannot join it, but the record below documents what was studied.
Get an email when the registry record changes — status, dates, results — or when someone posts here.
Sign in to followQuestions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.
Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.
Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.
Immunologic Deficiency Syndromes→
National Institute of Allergy and Infectious Diseases (NIAID)