Safety and Efficacy of T Cell Genetic Immunotherapy for HIV
![]() |
The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. |
ClinicalTrials.gov Identifier: NCT00131560 |
Recruitment Status :
Active, not recruiting
First Posted : August 18, 2005
Last Update Posted : June 8, 2011
|
- Study Details
- Tabular View
- No Results Posted
- Disclaimer
- How to Read a Study Record
Condition or disease | Intervention/treatment | Phase |
---|---|---|
HIV Infection | Genetic: VRX496-Modified Autologous T cells | Phase 2 |

Study Type : | Interventional (Clinical Trial) |
Estimated Enrollment : | 60 participants |
Allocation: | Non-Randomized |
Intervention Model: | Single Group Assignment |
Masking: | None (Open Label) |
Primary Purpose: | Treatment |
Official Title: | A Phase II, Open-label, Multicenter Study to Evaluate the Safety, Tolerability, and Biological Activity of Single and Repeated Doses of Autologous T Cells Transduced With VRX496 in HIV-Positive Subjects |
Study Start Date : | July 2005 |
Actual Primary Completion Date : | November 2008 |
Estimated Study Completion Date : | June 2023 |
Arm | Intervention/treatment |
---|---|
A |
Genetic: VRX496-Modified Autologous T cells
Genetic: Anti-HIV antisense |
- Change in viral load [ Time Frame: 1 Year ]
- Change in CD4 counts [ Time Frame: 1 Year ]
- Safety [ Time Frame: 15 Years ]
- Immune function [ Time Frame: 1 Year ]
- AIDS related illness [ Time Frame: 1 Year ]
- Persistence of vector modified cells [ Time Frame: 15 Years ]

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, Learn About Clinical Studies.
Ages Eligible for Study: | 18 Years to 65 Years (Adult, Older Adult) |
Sexes Eligible for Study: | All |
Accepts Healthy Volunteers: | No |
Inclusion Criteria:
- Sero-positive for infection with HIV and failed, or be intolerant to, at least one triple combination of antiretroviral agent
- If on antiretroviral therapy, subject must be willing to continue on current antiretroviral therapy; or if discontinues antiretroviral therapy must have a wash-out period of 6 weeks prior to screening; or if not on antiretroviral therapy must be willing to remain off antiretroviral therapy for the duration of the study (i.e. up to 1 year)
- Male or female, 18 years of age and older
- Karnofsky Performance score of 80 or higher
- Stable HIV viral load between 5,000 and 200,000 copies/mL at the time of screening. Stable will be defined as a variation of less than 0.5 log10 in the 3 months prior to screening while on a stable regimen or no therapy
- CD4 T cell count equal to or greater than 150 cells per μL at the time of screening
- A body weight greater than 50 Kg
- Adequate venous access and no other contraindications for leukapheresis
- Subject must be willing to comply with study-mandated evaluations
Exclusion Criteria:
- A history of any type of cancer or malignancy, with the exception of (successfully) treated basal cell or squamous cell carcinoma of the skin
- A history or any features on physical examination indicative of cardiac disease or hemodynamic instability
- Any history or any features on physical examination indicative of a bleeding diathesis
- Previous treatment with any HIV experimental vaccine or any gene therapy products
- A positive signal for VSV-G antibodies and/or VSV-G DNA in the blood at screening
-
Any of the following lab results:
- Hemoglobin: <10 (males); <9.5 (females) g/dL
- Absolute neutrophil count: < 1000/μL
- Platelet count: <100,000/mm3
- Serum creatinine: > 1.5 mg/dL (133µ mol/L)
- AST or ALT: > 2.5 times the upper limit of normal
- Total serum bilirubin: > 1.5 times the upper limit of normal
- Proteinuria: 2+ on urine dipstick
- Subjects must not be breastfeeding, be pregnant, or unwilling to use acceptable methods of birth control
- Subjects must not be on chronic oral corticosteroids within 30 days of screening - (if subjects are prescribed a brief course of oral corticosteroids the use should be limited to less than 1 week), hydroxyurea, or immunomodulating agents (e.g., IL 2, interferon-gamma, granulocyte colony stimulating factors, etc.) within 30-days of screening or foreseeably need any of these within the study period
- Subjects must not be using aspirin, dipyridamole, warfarin or any other medication likely to affect platelet function or other aspects of blood coagulation during the period when leukapheresis is scheduled
- Subjects must not suffer from active drug or alcohol dependence or abuse, to an extent that, in the opinion of the investigator, would interfere with their ability to comply with study requirements
- Any serious illnesses or acute opportunistic infection
- Any other illness or condition which in the opinion of the investigator would exclude the subject from the study
- Subjects unable or unwilling to give written informed consent

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00131560
United States, California | |
Stanford AIDS Clinical Trials Unit | |
Palo Alto, California, United States, 94304 | |
United States, Connecticut | |
CIRCLE Medical, LLC | |
Norwalk, Connecticut, United States, 06851 | |
United States, Florida | |
Steinhart Medical Associates | |
Miami, Florida, United States, 33133 | |
United States, Kentucky | |
University of Kentucky | |
Lexington, Kentucky, United States, 40536 | |
United States, New York | |
Jacobi Medical Center | |
Bronx, New York, United States, 10461 |
Study Director: | Tessio Rebello, PhD | VIRxSYS Corporation |
Publications:
Responsible Party: | Tessio Rebello/ Vice President Clinical Affairs, VIRxSYS Corporation |
ClinicalTrials.gov Identifier: | NCT00131560 |
Other Study ID Numbers: |
VRX496-USA-05-002 |
First Posted: | August 18, 2005 Key Record Dates |
Last Update Posted: | June 8, 2011 |
Last Verified: | June 2011 |
HIV, gene therapy, leukapheresis, autologous CD4 T cell, lentivector |
HIV Infections Blood-Borne Infections Communicable Diseases Infections Sexually Transmitted Diseases, Viral Sexually Transmitted Diseases |
Lentivirus Infections Retroviridae Infections RNA Virus Infections Virus Diseases Immunologic Deficiency Syndromes Immune System Diseases |