B-Lymphocyte Stimulator (BLyS) To Treat Selective IgA Deficiency

This study has been completed.
Sponsor:
Information provided by:
National Institutes of Health Clinical Center (CC)
ClinicalTrials.gov Identifier:
NCT00024934
First received: October 9, 2001
Last updated: July 10, 2006
Last verified: August 2004
  Purpose

This study will examine the safety of BlyS, an experimental drug being developed to treat immune deficiency. As of July 17, 2001, 7 persons with common variable immune deficiency (CVID) have received BlyS, with no problems reported. This study will test the safety of the drug in people with IgA deficiency.

Patients 18 years of age and older with IgA deficiency who have recurrent or chronic sinus or lung infections or chronic diarrhea or malabsorption may be eligible for this study. Candidates will be screened with a physical examination, blood and urine tests, electrocardiogram (EKG), chest X-ray and a breathing test (spirometry).

Participants will be divided into five groups of three persons each to receive different doses (0.1, 1, 5, 15 or 45 micrograms/kilogram of body weight) of BlyS. The first group will receive a single dose at the lowest dose level (0.l mg). Each succeeding group will receive a single higher dose following a 2-week observation period of the preceding group. The drug will be injected under the skin, with vital signs (temperature, pulse, blood pressure and breathing rate) monitored for one hour after dosing. Blood samples will be collected several times on the day of dosing (before the dose and at 1.5, 3, 5, 8 and 12 hours after the dose) and again at 1,2, 4, 8 and 12 weeks after the dose to measure BlyS levels and evaluate safety. Participants receiving one of the three higher doses will have additional blood samples collected 36, 48 and 60 hours after the dose. Blood will also be collected from all participants 6 and 12 months after dosing to look for any unexpected long-term effects. A total of 289 ml (1.2 cups) of blood will be collected.

Blood will be checked for changes in blood count, kidney and liver function, antibody levels and autoimmune problems. Saliva will be collected four times by placing a cotton ball in the mouth-once before the dose and three times after the dose-to measure antibody levels.

Urine samples will also be collected during the study.


Condition Intervention Phase
IgA Deficiency
Drug: B-Lymphocyte Stimulator (BLyS)
Phase 1

Study Type: Interventional
Study Design: Endpoint Classification: Safety Study
Primary Purpose: Treatment
Official Title: A Phase I Dose Escalation Study of B-Lymphocyte Stimulator (BLyS) Administered Subcutaneously in Patients With Selective IgA Deficiency

Resource links provided by NLM:


Further study details as provided by National Institutes of Health Clinical Center (CC):

Estimated Enrollment: 20
Study Start Date: October 2001
Estimated Study Completion Date: August 2004
Detailed Description:

B Lymphocyte Stimulator (BLyS (Trademark)) is a member of the tumor necrosis factor (TNF) superfamily of cytokines that is expressed on peripheral blood monocytes and dendritic cells. Cellular receptors for BLyS are detected on mature immunoglobulin (Ig) expressing B-lymphocytes. In vitro studies show that BLyS increases B cell number, Ig production, antigen-specific immunoglobulin response, and induces production of secretory IgA.

B-cells collected from patients with Common Variable Immune Deficiency show evidence for BLyS binding to B cells and enhanced immunoglobulin secretion.

In 28-day toxicology studies in mice, pharmacological effects were restricted to B lymphoid tissues including B lymphocyte hyperplasia, increased splenic weight without significant increase in spleen size, and increased immunoglobulin production. Murine models suggest that all of the pharmacological effects are fully and rapidly reversible.

The biological profile of BLyS suggests that it may have therapeutic utility in the treatment of immunodeficiency disorders characterized by low or absent immunoglobulin such as selective IgA deficiency (IGA-D).

Risk that BLyS might contribute to IGA-D complications has been assessed. A series of special in vitro and short-term in vivo studies have shown BLyS does not enhance tumorigenicity or allergy/hypersensitivity. Enhanced autoimmunity with immune complex formation could not be ruled out in two mouse studies in which BLyS was administered at higher doses on multiple dosing schedules. Renal changes with glomerular protein deposits were noted in a subset of mice treated at 0.1 and 1.0 mg/kg in the first study and 0.3 and 3.0 mg/kg in the second study. Renal changes have not been reproducible in either of 2 repeat mouse studies designed to replicate conditions on the first study. Renal changes were not observed in the GLP toxicity study in which mice were treated for 4 weeks with BLyS followed by a 2-week recovery period, or in an exploratory monkey study.

This study is a phase I; single-dose, open-label, non-randomized, dose escalation study of BLyS administered subcutaneously to a total of 20 evaluable subjects with IgA-D. Each subject will receive a single dose of BLyS.

The proposed study consists of a screening phase, a 1-day treatment phase with pharmacokinetic sampling, day 2 and day 3 follow-up, and 1, 2, 4, 8, and 12-week acute safety evaluations. Dose escalation to the next cohort is dependent on results of the 2-week acute safety evaluation. Autoimmunity and interim infection history will be evaluated 4-6 weeks and 6 and 12 months. Long-term data will be collected on incidence of malignancy for a minimum of one year.

  Eligibility

Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No
Criteria

INCLUSION CRITERIA:

Eligible subjects must meet the diagnostic criteria for IgA deficiency as defined by WHO or PAGID/ESID (Conley, 1999).

Diagnosis of IgA-D with recurrent or chronic sinopulmonary infection or chronic diarrhea/malabsorption.

Serum IgA at least 2 standard deviations below the mean at screening.

Eligible patients will be at least 18 years of age.

Liver function tests (SGOT, SGPT, alkaline phosphatase, total bilirubin) within 1.25 x upper limit of normal.

Serum creatinine within normal limits.

Patients must be able to understand and sign an informed consent form.

EXCLUSION CRITERIA:

A history of malignancy (other than adequately treated in situ carcinoma or non-melanotic skin cancer).

Active clinically-significant autoimmune manifestations within 2 years of study entry; any history of IgA nephropathy or Henoch-Schonlein purpura.

Pre-existing renal disease; proteinuria greater than trace at screening.

Symptomatic cardiac disease (greater than grade 1 NCI CTC) at screening. Patients with adequately treated well-controlled hypertension or minor arrythmias are eligible.

Pulmonary disease requiring treatment, bronchiectasis on baseline chest x-ray or FEV1 less than 75% normal limits at baseline evaluation. Patients with adequately treated well-controlled asthma are eligible.

Splenomegaly associated with cytopenias.

Significant cytopenias: Anemia (Hct less than 30%); Neutropenia (ANC less than 1500/microL); Thrombocytopenia (Platelets less than 75,000/mm(3)).

Biopsy-proven granulomatous disease.

B-lymphocyte count at screening less than 50/microL.

Use immune-based therapies (other than IVIG) such as chronic corticosteroid use, growth factors or other immune-modulating drugs within 4 weeks of screening (inhaled corticosteroids are permitted).

Pregnant female or nursing mother. (All females of childbearing potential must have had a negative blood or urine pregnancy test at screening. Over the course of the study, all female subjects must have practiced a method of contraception with greater than 90% reliability, or be sterile or postmenopausal.)

Participation in any clinical trial involving investigational or conventional drugs within 30 days of screening.

Known active hepatitis (testing not required for study entry).

  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its ClinicalTrials.gov identifier: NCT00024934

Locations
United States, Maryland
National Cancer Institute (NCI)
Bethesda, Maryland, United States, 20892
Sponsors and Collaborators
  More Information

No publications provided

ClinicalTrials.gov Identifier: NCT00024934     History of Changes
Other Study ID Numbers: 020009, 02-C-0009
Study First Received: October 9, 2001
Last Updated: July 10, 2006
Health Authority: United States: Federal Government

Keywords provided by National Institutes of Health Clinical Center (CC):
Immunodeficiency
Primary
Cancer
Genetics
IGA Deficiency
Immune Deficiency

Additional relevant MeSH terms:
IgA Deficiency
Dysgammaglobulinemia
Blood Protein Disorders
Hematologic Diseases
Immunologic Deficiency Syndromes
Immune System Diseases

ClinicalTrials.gov processed this record on July 23, 2014