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CompletedNCT00000675Updated Jun 24, 2005

A Phase I Study of the Safety and Pharmacokinetics of Recombinant Human CD4 Immunoglobulin (rCd4-IgG) Administered by Intravenous Bolus in Patients With AIDS and AIDS Related Complex

A Phase 1 interventional study of CD4-IgG in HIV Infections, sponsored by National Institute of Allergy and Infectious Diseases (NIAID). Completed at 2 sites in United States. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2005-06-24.

Sponsored by National Institute of Allergy and Infectious Diseases (NIAID) · Phase 1, Interventional, and Treatment

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Phase
Phase 1
Study type
Interventional
Enrollment
60
Ages
18 Years and older
Sex
All
01

Where this study stands

Counted across the records on this site · 2026-11-14

Among 1,034 studies in HIV Infections by National Institute of Allergy and Infectious Diseases (NIAID) — 10 open to participants now, 15 under way, 1 of them phase 3. HIV Infections · National Institute of Allergy and Infectious Diseases (NIAID).

Enrollment
417th of 883
60 · median 59
Phase 1
365 of 1,034
4 open now
Registered
1st of 1,034
by date

Among the 1,034 studies in HIV Infections by National Institute of Allergy and Infectious Diseases (NIAID), this one is the 417th largest by enrollment of the 883 interventional ones that give a count, is one of 365 in phase 1, and was the 1st registered.

HIV Infections

4,736 studies on the registry are indexed under HIV Infections; 246 are open to participants now.

Browse HIV Infections studies →

Open to participants now

10 of the 1,034 studies in HIV Infections by National Institute of Allergy and Infectious Diseases (NIAID) are open now, in 12 countries. Recruiting first, the newest first:

5 more — sign in →

By country, each count listing its studies:

All 10 open studies →

Who these studies take

Of the 159 HIV Infections studies recruiting now, 104 (65%) set no upper age limit and 42 (26%) stop at 75 or younger; 31 take children under 18; 60 take healthy volunteers.

This study: 18 Years and older · all sexes · no healthy volunteers.

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02

Study summary

To study the safety and pharmacokinetics (blood levels) of recombinant human CD4 immunoglobulin (rCd4-IgG) in patients with AIDS or AIDS related complex (ARC) who have failed or declined therapy with zidovudine (AZT). An additional goal of the study is to obtain a preliminary indication of the antiviral effects of Cd4-IgG in patients with AIDS or ARC.

Other approaches in addition to existing treatment of HIV infection need to be evaluated. One approach may be to block HIV infection by interrupting the assembly of the virus within the cell or the budding of virus from the membrane of the infected cell. In addition, blocking the attachment of HIV to its cellular receptor may offer another point of attack. HIV binds to the CD4 receptor on the target T4 lymphocyte and the envelope glycoprotein of the virus (gp120) is capable of high affinity binding to CD4. Any agent that prevents the attachment of gp120 to the CD4 receptor should be able to block virus transmission and spread. Recently, scientists have succeeded in producing highly purified recombinant soluble human CD4. Recombinant CD4 is capable of binding to HIV envelope protein (gp120) and inhibiting HIV infectivity in test tube studies. Potential therapeutic benefit in patients with HIV infection could be derived from either or both of these biologic effects. In order to extend the length of time that rCD4 stays in the body, the compound has been modified by combining it with a human immunoglobulin of the IgG1 class (IgG).

Read the detailed description

Other approaches in addition to existing treatment of HIV infection need to be evaluated. One approach may be to block HIV infection by interrupting the assembly of the virus within the cell or the budding of virus from the membrane of the infected cell. In addition, blocking the attachment of HIV to its cellular receptor may offer another point of attack. HIV binds to the CD4 receptor on the target T4 lymphocyte and the envelope glycoprotein of the virus (gp120) is capable of high affinity binding to CD4. Any agent that prevents the attachment of gp120 to the CD4 receptor should be able to block virus transmission and spread. Recently, scientists have succeeded in producing highly purified recombinant soluble human CD4. Recombinant CD4 is capable of binding to HIV envelope protein (gp120) and inhibiting HIV infectivity in test tube studies. Potential therapeutic benefit in patients with HIV infection could be derived from either or both of these biologic effects. In order to extend the length of time that rCD4 stays in the body, the compound has been modified by combining it with a human immunoglobulin of the IgG1 class (IgG).

Each patient receives rCd4-IgG at a fixed dose level once weekly by intravenous bolus for 12 weeks. Four patients (two per center) are entered at each dose level starting with the lowest dose. Dose escalation proceeds until a maximum tolerated dose (MTD) is defined. AMENDED: Includes, as of 891201, an ancillary study entitled "A Study of Recombinant CD4-Immunoglobulin G (CD4-IgG) Levels in Cerebral Spinal Fluid after rCD4-IgG is Administered by Intravenous Bolus in Patients With AIDS and AIDS-Related Complex". This involves selected patients, at the discretion of the Investigator. AMENDED: 900110 To increase the dose and frequency of administration of rCD4-IgG, based on preliminary results of pharmacokinetic analyses from Phase I studies in humans. Each patient receives rCD4-IgG therapy at a fixed dose level 1x, 2x, or 3x weekly by intravenous bolus for 12 weeks. Follow-up is extended to 8 weeks. Total target accrual is 25 - 28 weeks. AMENDED: 900824 Extension of the Phase I study of the safety and efficacy of CD4-IgG in patients with HIV infection. Each patient receives one of two fixed doses by IV bolus injection twice per week for 12 weeks. 20 to 30 patients to be enrolled. Pharmacokinetics will be evaluated. Clinical safety and antiviral effects will be assayed.

03

Conditions studied

  • HIV Infections

Keywords

  • Recombinant Proteins
  • IgG
  • Drug Evaluation
  • Acquired Immunodeficiency Syndrome
  • Antigens, CD4
  • AIDS-Related Complex
  • Carrier Proteins
04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

Patients must fulfill the following criteria:

  • Diagnosis of AIDS or AIDS-related complex, according to CDC criteria, in previously documented seropositive individuals.
  • Failure to tolerate or respond to zidovudine (AZT) therapy for HIV infection or a decision to decline such therapy.
  • Willingness to abstain from all other experimental therapy for HIV infection during study period.
  • of at least 3 months.
  • Patients must be able to sign a written form.

Exclusion criteria

Exclusion Criteria

Co-existing Condition:

Patients with the following are excluded:

  • Serious active opportunistic infection or not specifically allowed.

Concurrent Medication:

Excluded:

  • Oral or intravenous acyclovir for herpes.
  • Zidovudine (AZT).
  • Interferon.
  • .
  • Nonsteroidal anti-inflammatory agents (NSAIDS).
  • Intravenous acyclovir.
  • Other known immunomodulatory agents.
  • Other experimental therapy.

Patients with the following are excluded:

  • Serious active opportunistic infection or malignancies not specifically allowed.

Prior Medication:

Excluded within 4 weeks of study entry:

  • Zidovudine (AZT).
  • Chemotherapy.
  • Immunomodulatory agents.
  • Other experimental therapy.
Terms in these criteria, in plain language(5)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

HIV

The human immunodeficiency virus, which weakens the immune system.

Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.

Life expectancy

The study doctor’s estimate of how long someone is likely to live. Criteria use it so that people can stay in the study long enough for it to answer its question.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

Cancer (malignancy)

Malignancy means cancer. Criteria about another or earlier malignancy ask whether you have had a different cancer, usually within a set number of years.

Some are commonly allowed, such as treated skin cancers other than melanoma and early cancers removed completely — check the exceptions this study lists.

Corticosteroids (steroids)

Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.

Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.

05

Study design

Phase
Phase 1
Primary purpose
Treatment
Enrollment
60 participants

Interventions

06

Study locations

2 sites
  • Stanford Univ School of Medicine
    Stanford, California 94305, United States
  • Univ of Washington
    Seattle, Washington 98105, United States
07

References and documents

Publications

  • Collier AC, Coombs RW, Katzenstein D, Holodniy M, Gibson J, Mordenti J, Izu AE, Duliege AM, Ammann AJ, Merigan T, et al. Safety, pharmacokinetics, and antiviral response of CD4-immunoglobulin G by intravenous bolus in AIDS and AIDS-related complex. J Acquir Immune Defic Syndr Hum Retrovirol. 1995 Oct 1;10(2):150-6. doi: 10.1097/00042560-199510020-00006. PubMed 7552478 ↗
  • Collier A, Katzenstein D, Coombs R, Holodniy M, Mordenti J, Arditti D, Ammann A, Merigan T, Corey L. Safety and pharmacokinetics of intravenous recombinant CD4 immunoadhesin (RCD4-IGG) (AIDS Clinical Trials Group Protocol 121). Int Conf AIDS. 1990 Jun 20-23;6(3):206 (abstract no SB480)
08

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jun 24, 2005, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
09

Registry details

Key details

Study ID
NCT00000675
Collaborators
Genentech, Inc.
First posted
Aug 31, 2001
Last update
Jun 24, 2005

Study contacts

L Corey
study chair
A Collier
study chair
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Jan 1991. You cannot join it, but the record below documents what was studied.

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Discussion

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Studies of the drug tested here: CD4 Immunoadhesins

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