Study of Autologous T-cells Genetically Modified at the CCR5 Gene by Zinc Finger Nucleases in HIV-Infected Subjects

Sangamo Therapeutics

Status and phase

Completed

Phase 2

Phase 1

Conditions

HIV Infection

HIV

Treatments

Biological: SB-728-T

Study type

Interventional

Funder types

Industry

Identifiers

NCT01252641

SB-728-1002

Details and patient eligibility

About

This research study is being carried out to study a new way to possibly treat human immunodeficiency virus (HIV). The agent is called SB-728-T which are CD4+ T-cells obtained from an individual that are genetically modified at the CCR5 gene by Zinc Finger Nucleases. The CCR5 gene is required for certain types of HIV to enter into and infect T-cells. T cells are one of the white blood cells used by the body to fight HIV. The most important of these are called "CD4+ T-cells"

Some people are born without the CCR5 gene on their T-Cells. These people remain healthy and are resistant to infection with HIV. Other people have a low number of CCR5 genes on their T-cells and their HIV disease is less severe and is slower to cause disease (AIDS).

The purpose of this research study is to find out whether SB-728-T is safe to give to humans and find out how this affects HIV.

Full description

Laboratory studies have shown that when CD4+ T-cells are modified with Zinc Finger Nucleases SB-728, HIV is prevented from killing the CD4+ T-cells. On the basis of these laboratory results, there is the potential that this may work in humans infected with HIV and improve their immune system by allowing their CD4+ T-cells to survive longer.

The new treatment to be studied will involve removing white blood cells from the blood that contain CD4+ T-cells. The extracted CD4+ T-cells are then genetically modified by the Zinc finger Nucleases to be resistant to infection by removing the CCR5 gene from the surface of the CD4+ T-cell where HIV enters the cell. Additional genetically modified cells are manufactured and then re-infused back into the individual. Researchers hope that these genetically modified cells will be resistant to infection by HIV and will be able to reproduce additional resistant CD4+ T-cells in your body.

Enrollment

21 patients

Sex

All

Ages

18+ years old

Volunteers

No Healthy Volunteers

Inclusion criteria

Documented HIV infection
CD4+ T-cell count >500 cell per millimeter cubed (cells/mm3)
CD4+ T-cell nadir of >400 cells/mm3
HIV viral load >1,000 copies per milliliter (mL)

Exclusion criteria

Any viral hepatitis
Acute HIV infection
HIV viral load >1,000,000 copies/mL
Active or recent (prior 6 months) AIDS defining complication
Any HIV medications within the past 12 weeks
Cancer or malignancy that has not been in remission for at least 5 years with the exception of successfully treated basal cell carcinoma of the skin
Current diagnosis of NYHA grade 3 or 4 congestive heart failure or uncontrolled angina or arrhythmias
History of bleeding problems
Use of chronic steroids in past 30 days
Pregnant or breast feeding
Active drug or alcohol abuse
Serious illness in past 30 days
Currently participating in another clinical trail or any prior gene therapy