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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Lymphocytopenia Clear all
Not listed No phase listed Observational

Study of Genetic and Molecular Defects in Primary Immunodeficiency Disorders

NCT00004341
View directory record Official record
Conditions
X-Linked Agammaglobulinemia, X-Linked Hyper IgM Syndrome, Wiskott-Aldrich Syndrome, Leukocyte Adhesion Deficiency Syndrome
Interventions
Not listed
Lead sponsor
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
NIH
Eligibility
0 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 1995
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Jun 23, 2005 · Synced Jun 11, 2026, 3:10 AM EDT
Recruiting Phase 2 Interventional

Reduced Intensity Conditioning for Non-Malignant Disorders Undergoing UCBT, BMT or PBSCT

NCT01962415
View directory record Official record
Conditions
Primary Immunodeficiency (PID), Congenital Bone Marrow Failure Syndromes, Inherited Metabolic Disorders (IMD), Hereditary Anemias, Inflammatory Conditions, Systemic Juvenile Idiopathic Arthritis (sJIA), Juvenile Rheumatoid Arthritis (JRA)
Interventions
Hydroxyurea, Alemtuzumab, Fludarabine, Melphalan, Thiotepa
Drug
Lead sponsor
Paul Szabolcs
Other
Eligibility
2 Months to 55 Years
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2027
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Dec 14, 2025 · Synced Jun 11, 2026, 3:10 AM EDT
Completed Phase 1 Interventional

Basiliximab in Treating Patients With Newly Diagnosed Glioblastoma Multiforme Undergoing Targeted Immunotherapy and Temozolomide-Caused Lymphopenia

NCT00626483
View directory record Official record
Conditions
Malignant Neoplasms Brain
Interventions
RNA-loaded dendritic cell vaccine, basiliximab
Biological · Drug
Lead sponsor
Gary Archer Ph.D.
Other
Eligibility
18 Years to 120 Years
Enrollment
34 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2016
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Mar 8, 2021 · Synced Jun 11, 2026, 3:10 AM EDT
Recruiting No phase listed Observational

Data Collection Study of Patients With Non-Malignant Disorders Undergoing UCBT, BMT or PBSCT With RIC

NCT04528355
View directory record Official record
Conditions
Primary Immunodeficiency (PID), Congenital Bone Marrow Failure Syndromes, Inherited Metabolic Disorders (IMD), Hereditary Anemias, Inflammatory Conditions
Interventions
data collection
Drug
Lead sponsor
Paul Szabolcs
Other
Eligibility
2 Months to 60 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2028
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jan 12, 2026 · Synced Jun 11, 2026, 3:10 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

The Mechanistic Biology of Primary Immunodeficiency Disorders

NCT03394053
View directory record Official record
Conditions
Primary Immunodeficiency Disorders
Interventions
Not listed
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
1 Day to 90 Years
Enrollment
2,500 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2040
U.S. locations
2
States / cities
Washington D.C., District of Columbia • Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 28, 2026 · Synced Jun 11, 2026, 3:10 AM EDT
Completed No phase listed Observational

Study of Megakaryocytes From Patients With Abnormal Platelet Vesicles

NCT00086476
View directory record Official record
Conditions
Blood Coagulation Disorders
Interventions
Not listed
Lead sponsor
National Human Genome Research Institute (NHGRI)
NIH
Eligibility
2 Years to 80 Years
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2011
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 1, 2017 · Synced Jun 11, 2026, 3:10 AM EDT
Completed Early Phase 1 Interventional

A Safety Study of Fingolimod With Radiation and Temozolomide in Newly Diagnosed High Grade Glioma

NCT02490930
View directory record Official record
Conditions
Glioblastoma, Anaplastic Astrocytoma
Interventions
Fingolimod
Drug
Lead sponsor
Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins
Other
Eligibility
18 Years and older
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Sep 12, 2017 · Synced Jun 11, 2026, 3:10 AM EDT
Completed Phase 4 Interventional Results available

Safety and Efficacy Study of Flebogamma 5% DIF IGIV in Pediatric Subjects

NCT00634569
View directory record Official record
Conditions
Primary Immune Deficiency Disease
Interventions
Flebogamma 5% DIF
Biological
Lead sponsor
Instituto Grifols, S.A.
Industry
Eligibility
2 Years to 16 Years
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2011
U.S. locations
7
States / cities
St. Petersburg, Florida • Atlanta, Georgia • Chicago, Illinois + 4 more
Source: ClinicalTrials.gov public record
Updated Feb 1, 2017 · Synced Jun 11, 2026, 3:10 AM EDT
Completed Phase 2 Interventional Results available

Treosulfan and Fludarabine Phosphate Before Donor Stem Cell Transplant in Treating Patients With Nonmalignant Inherited Disorders

NCT00919503
View directory record Official record
Conditions
Non-Neoplastic Hematologic and Lymphocytic Disorder
Interventions
Allogeneic Bone Marrow Transplantation, Anti-Thymocyte Globulin, Cyclosporine, Fludarabine Phosphate, Laboratory Biomarker Analysis, Methotrexate, Mycophenolate Mofetil, Peripheral Blood Stem Cell Transplantation, Tacrolimus, Total-Body Irradiation, Treosulfan, Umbilical Cord Blood Transplantation
Procedure · Biological · Drug + 2 more
Lead sponsor
Fred Hutchinson Cancer Center
Other
Eligibility
Up to 49 Years
Enrollment
98 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2020
U.S. locations
6
States / cities
Aurora, Colorado • Portland, Oregon • Nashville, Tennessee + 2 more
Source: ClinicalTrials.gov public record
Updated Aug 12, 2021 · Synced Jun 11, 2026, 3:10 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Etiology, Pathogenesis, and Natural History of Idiopathic CD4+ Lymphocytopenia

NCT00867269
View directory record Official record
Conditions
Idiopathic CD4+ Lymphocytopenia, Cryptococcal Meningitis, Warts
Interventions
Not listed
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years and older
Enrollment
950 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
Started 2009
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jun 7, 2026 · Synced Jun 11, 2026, 3:10 AM EDT
Completed No phase listed Observational

Newborn Screening for Severe Combined Immunodeficiency (SCID) in a High-Risk Population

NCT00845416
View directory record Official record
Conditions
Severe Combined Immunodeficiency, T Cell Lymphocytopenia
Interventions
Not listed
Lead sponsor
University of California, San Francisco
Other
Eligibility
1 Day to 30 Days
Enrollment
1,800 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2011
U.S. locations
2
States / cities
Chinle, Arizona • Tuba City, Arizona
Source: ClinicalTrials.gov public record
Updated Jul 15, 2012 · Synced Jun 11, 2026, 3:10 AM EDT
Enrolling by invitation Phase 1Phase 2 Interventional

Sequential Cadaveric Lung and Bone Marrow Transplant for Immune Deficiency Diseases

NCT01852370
View directory record Official record
Conditions
Severe Combined Immunodeficiency (SCID), Immunodeficiency With Predominant T-cell Defect, Unspecified, Severe Chronic Neutropenia, Chronic Granulomatous Disease (CGD), Hyper IgE Syndromes, Hyper IgM Deficiencies, Wiskott-Aldrich Syndrome, Mendelian Susceptibility to Mycobacterial Disease, Common Variable Immune Deficiency (CVID)
Interventions
CD3/CD19 negative allogeneic hematopoietic stem cells
Biological
Lead sponsor
Paul Szabolcs
Other
Eligibility
5 Years to 45 Years
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2027
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Dec 14, 2025 · Synced Jun 11, 2026, 3:10 AM EDT
Completed Phase 2 Interventional Results available

A Study of IL-7 to Restore Absolute Lymphocyte Counts in Sepsis Patients

NCT02640807
View directory record Official record
Conditions
Severe Sepsis With Septic Shock
Interventions
Interleukin-7, Placebo
Drug
Lead sponsor
Revimmune
Industry
Eligibility
18 Years to 80 Years
Enrollment
27 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2018
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jul 8, 2020 · Synced Jun 11, 2026, 3:10 AM EDT
Completed Phase 4 Interventional Results available

A Study to Find Out How Safe and Effective Gammaplex® is in Young People With Primary Immunodeficiency

NCT01289847
View directory record Official record
Conditions
Primary Immune Deficiency Disorders, Common Variable Immunodeficiency, X-linked Agammaglobulinemia, Hyper-IgM Syndrome, Wiskott-Aldrich Syndrome
Interventions
Gammaplex
Biological
Lead sponsor
Bio Products Laboratory
Other
Eligibility
2 Years to 16 Years
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2014
U.S. locations
8
States / cities
Irvine, California • Los Angeles, California • Centennial, Colorado + 5 more
Source: ClinicalTrials.gov public record
Updated Dec 22, 2014 · Synced Jun 11, 2026, 3:10 AM EDT
Terminated Phase 1 Interventional Results available

EGFRvIII CAR T Cells for Newly-Diagnosed WHO Grade IV Malignant Glioma

NCT02664363
View directory record Official record
Conditions
Glioblastoma, Gliosarcoma
Interventions
EGFRvIII CAR T cells
Biological
Lead sponsor
Daniel Landi
Other
Eligibility
18 Years to 80 Years
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Feb 16, 2023 · Synced Jun 11, 2026, 3:10 AM EDT
Completed Phase 1 Interventional Results available

A Placebo Controlled Trial of Bempegaldesleukin (BEMPEG; NKTR-214) With Standard of Care in Patients With Mild COVID-19

NCT04646044
View directory record Official record
Conditions
Covid-19, Coronavirus Disease 2019
Interventions
Bempegaldesleukin, Standard of Care, Placebo
Drug · Other
Lead sponsor
Nektar Therapeutics
Industry
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
4
States / cities
Hialeah, Florida • Winter Park, Florida • Mesquite, Texas
Source: ClinicalTrials.gov public record
Updated Mar 11, 2024 · Synced Jun 11, 2026, 3:10 AM EDT
Completed Phase 1Phase 2 Interventional Results available

Conditioning Regimen for Allogeneic Hematopoietic Stem-Cell Transplantation

NCT03513328
View directory record Official record
Conditions
Bone Marrow Failure Syndrome, Thalassemia, Sickle Cell Disease, Diamond Blackfan Anemia, Acquired Neutropenia in Newborn, Acquired Anemia Hemolytic, Acquired Thrombocytopenia, Hemophagocytic Lymphohistiocytoses, Wiskott-Aldrich Syndrome, Chronic Granulomatous Disease, Common Variable Immunodeficiency, X-linked Lymphoproliferative Disease, Severe Combined Immunodeficiency, Hurler Syndrome, Mannosidosis, Adrenoleukodystrophy
Interventions
Thiotepa--single daily dose, Thiotepa--escalated dose
Drug
Lead sponsor
University of Florida
Other
Eligibility
3 Months to 39 Years
Enrollment
6 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2023
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Sep 14, 2023 · Synced Jun 11, 2026, 3:10 AM EDT
Completed No phase listed Observational

Patients Treated for Wiskott-Aldrich Syndrome (WAS) Since 1990

NCT02064933
View directory record Official record
Conditions
Wiskott-Aldrich Syndrome
Interventions
Not listed
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
Male only
Enrollment
305 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2019
U.S. locations
38
States / cities
Birmingham, Alabama • Phoenix, Arizona • Los Angeles, California + 33 more
Source: ClinicalTrials.gov public record
Updated Aug 9, 2020 · Synced Jun 11, 2026, 3:10 AM EDT
Recruiting Phase 2 Interventional Accepts healthy volunteers

Hematopoietic Stem Cell Mobilization in Idiopathic CD4 Lymphocytopenia Patients and Healthy Controls for the Study of T Cell Maturation and Trafficking in Murine Models

NCT02015013
View directory record Official record
Conditions
Idiopathic CD4-Positive, T-Lymphocytopenia
Interventions
Filgrastim, Plerixafor
Biological · Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 65 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2026
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jun 4, 2026 · Synced Jun 11, 2026, 3:10 AM EDT
Active, not recruiting Phase 3 Interventional

A Clinical Study to Evaluate the Use of a Cryopreserved Formulation of OTL-103 in Subjects With Wiskott-Aldrich Syndrome

NCT03837483
View directory record Official record
Conditions
Wiskott-Aldrich Syndrome
Interventions
OTL-103
Genetic
Lead sponsor
Fondazione Telethon
Other
Eligibility
Up to 65 Years
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2027
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Sep 28, 2025 · Synced Jun 11, 2026, 3:10 AM EDT
Terminated Phase 1 Interventional

Study of the Effect NT-I7 on CD4 Counts in Patients With High Grade Gliomas

NCT02659800
View directory record Official record
Conditions
Lymphopenia, Malignant Glioma
Interventions
Laboratory Biomarker Analysis, NT-I7, Placebo
Other · Biological
Lead sponsor
Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins
Other
Eligibility
18 Years and older
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2023
U.S. locations
10
States / cities
Birmingham, Alabama • Baltimore, Maryland • Boston, Massachusetts + 7 more
Source: ClinicalTrials.gov public record
Updated Oct 5, 2023 · Synced Jun 11, 2026, 3:10 AM EDT
Active, not recruiting Phase 2 Interventional

Immunogenicity of the 9-Valent Human Papillomavirus Recombinant Vaccine in People With Idiopathic CD4 T Cell Lymphocytopenia

NCT03519464
View directory record Official record
Conditions
Idiopathic CD4 T Cell Lymphocytopenia
Interventions
Gardasil 9
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 70 Years
Enrollment
54 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2026
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 23, 2026 · Synced Jun 11, 2026, 3:10 AM EDT
Completed Not applicable Interventional

Feasibility of Lymphocyte Reinfusion in Newly Diagnosed High Grade Gliomas

NCT01653834
View directory record Official record
Conditions
Glioblastoma
Interventions
Lymphocyte harvesting & reinfusion
Procedure
Lead sponsor
Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins
Other
Eligibility
18 Years and older
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Nov 6, 2018 · Synced Jun 11, 2026, 3:10 AM EDT
Completed No phase listed Observational

COVID-19 Associated Lymphopenia Pathogenesis Study in Blood

NCT04401436
View directory record Official record
Conditions
Coronavirus Disease 2019
Interventions
Not listed
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 99 Years
Enrollment
240 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2025
U.S. locations
3
States / cities
Washington D.C., District of Columbia • Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Oct 26, 2025 · Synced Jun 11, 2026, 3:10 AM EDT