Interleukin-7 (CYT107) Treatment of Idiopathic CD4 Lymphocytopenia: Expansion of CD4 T Cells (ICICLE)
Public ClinicalTrials.gov record NCT00839436. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
Background: * Idiopathic CD4 lymphocytopenia (ICL) is a condition in which patients have low levels of T cells, a type of white blood cell that helps fight infection. Animal studies have shown that an experimental drug Interleukin 7 (IL-7), which is named CYT107, can increase the number and function of T cells. CYT107, however, has not been used in people with ICL. Objectives: * To determine the safety of CYT107 in people with ICL. * To determine whether CYT107 will increase the number and function of T cells in people with ICL. Eligibility: * Patients 18 years of age and older diagnosed with ICL and who are at risk of becoming sick because of this condition are eligible for this study. In addition, patients must not be pregnant, or have other illnesses that would cause low CD4 T cell counts, such as human immunodeficiency virus (HIV) or human T-lymphotrophic virus (HTLV) infection. Design: * The initial screening visit will include the following examinations and tests: * A complete physical exam and medical history * Blood analysis, including CD4 T cell count; complete blood count and additional blood tests to determine clotting ability and blood composition; thyroid, liver, kidney, and pancreatic function tests; HIV and HTLV tests; and tests for anti-IL-7 antibodies that block normal IL-7 activity * Routine urine test * Urine or blood pregnancy test for women * Chest X-ray * Electrocardiogram * Spleen ultrasound. * The baseline visit will include blood tests to determine levels of each of the major types of antibodies, a test of genetic background, and more detailed CD4 and protein analysis. In addition, leukapheresis (a procedure to collect large numbers of immune cells without red blood cells) will be done. Participants will also have the option of having colon and lymph node biopsies. * The schedule will be as follows: * Weeks 1, 2, and 3 (Cycle 1): Three weekly IL-7 dosing visits. * Weeks 5, 8, and 12: Follow-up visits. * Weeks 24, 25, and 26 (Cycle 2): Three more weekly IL-7 dosing visits. * Weeks 28, 31, and 35: Follow-up visits. * Week 48: End of study visit. * Tests conducted before getting IL-7 will be repeated during the IL-7 cycles and follow-up visits to compare with earlier values. Optional colon and lymph node biopsies done at baseline will be repeated 1 6 weeks prior to Cycle 2 and 1 6 weeks prior to Week 48.
Study identification
- NCT ID
- NCT00839436
- Recruitment status
- Terminated
- Study type
- Interventional
- Phase
- Phase 1, Phase 2
- Enrollment
- 21 participants
Conditions and interventions
Conditions
Eligibility (public fields only)
- Age range
- 18 Years and older
- Sex
- All
- Healthy volunteers
- Healthy volunteers not accepted
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Jan 31, 2009
- Primary completion
- Apr 30, 2014
- Completion
- Aug 31, 2014
- Last update posted
- Oct 14, 2015
2009 – 2014
United States locations
- U.S. sites
- 1
- U.S. states
- 1
- U.S. cities
- 1
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| National Institutes of Health Clinical Center, 9000 Rockville Pike | Bethesda | Maryland | 20892 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT00839436, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Oct 14, 2015 · Synced Sep 6, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT00839436 live on ClinicalTrials.gov.