Novel Interventions in HIV-1 Infection

NCT ID: NCT01130376

Last Updated: 2013-09-04

Basic Information

• Recruitment Status: TERMINATED
• Clinical Phase: PHASE1
• Total Enrollment: 12 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2009-09-30
• Study Completion Date: 2011-10-31

Brief Summary

For several years there has been interest in why some people with HIV-1 progress more slowly to disease and have longer survival without Highly Active Antiretroviral Therapy (HAART) than others. The investigators and others have identified a few HIV positive individuals who can control their viral load for many years without HAART, these rare individuals do not lose their HIV-1-specific cellular immune responses, which are very important for controlling viral load. This group is referred to as long-term non-progressors (LTNP). Unlike LTNP the majority of HIV-1 infected individuals are chronic progressors (CP) who do not make effective HIV-1-specific cellular immune responses, even when on HAART. We propose to use a novel DNA vaccine boosted with immune based therapy (cytokines and hormones) to try to regenerate the missing HIV-1-specific cellular immune responses to make chronically infected HIV-1+ persons more like LTNP.

By injecting this novel DNA vaccine and immune based therapy into the people who are already infected with HIV-1, the immune system may be stimulated to mount a greater immune response not only to the vaccines but also to real HIV-1 particles and HIV-1-infected cells.

Detailed Description

This will be a randomised, Phase I, open label comparative study running for 52 weeks (2 screen visits 2 weeks apart followed by 48 weeks of study). 50 patients will be screened in the initial phase of which 30 clade B infected individuals will be randomised into the study, which will consist of 3 arms:

Arm 1 will ascertain vaccine safety and toxicity in the presence of cytokine/hormone therapy.

Arm 2 will identify vaccine safety and toxicity.

Arm 3 will indicate safety and toxicity of cytokine/hormone therapy.

The target patients are chronically HIV-1 clade B infected persons who will have had a nadir CD4 T-cell count of >200 cells/ul blood before they started ART. The current CD4 T-cell count should be >400 cells/ul blood. Patients may have received ART for any length of time, but currently should be receiving NNRTI or boosted-PI based HAART, and have a viral load below the level of detection (50 copies/ml plasma). Patients will be bled on two occasions before commencing IBT regimens, in order to establish baselines, and then at regular intervals thereafter (weeks 0,1,2,4,6,8,12,16,24 and 48).

The treatment regimens are consistent with previous findings in animal models which suggest that administration of IL-2 during the antigen-specific T-cell contraction phase of an immune response (between 8 and 15 days post-vaccination) may preserve and lengthen clinically relevant responses. Furthermore studies in man have demonstrated that IL-2 administered before immunisation in ART-treated HIV-1-infected patients does not increase specific lymphoproliferation of T cells.

Recent preliminary studies in HIV-1-infected individuals using tetanus vaccines the investigators have shown that IL-2 administered after immunisation may be more effective at inducing sustained tetanus-specific responses than IL-2 administered before immunisation or together with immunisation. The dosages used in this study are based on those used in previous pilot studies of the administration of IL-2 + GM-CSF and rhGH and at these levels the drugs have been shown to have both positive effect on the immune response and demonstrated clinical benefit whilst being at a level which is safe and well tolerated in HIV-1 positive individuals. The dosage of the vaccine was based on a previous study where a dosage of this level has been shown to induce an immune response although this response was transient. In summary the investigators aim to increase the survival of vaccine responses through the administration of cytokines/hormones and boost memory responses with further rounds of immunisation.

Conditions

HIV-1 Infection

Keywords

Immune based therapy; Therapeutic vaccination; cytokine therapy; HIV therapeutic vaccine

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: PARALLEL
• Primary Study Purpose: TREATMENT
• Blinding Strategy: NONE

Study Groups

Vaccine and cytokines

Day 0: Patients receive GTU-MultiHIV B clade vaccine 1mg/ml administered as 10 intradermal injections of 100 µl/injection.

Day 7-11: One week following this, patients receive a 5 day course of Cytokines: Aldesleukin (IL-2) Novartis UK (BD; 8 hours apart) 5 million units administered by SC injection. Sargramostim (GM-CSF) - Leukine™, Berlex Seattle US 150ug SC once daily 4 hours from rhIL-2 injections.

Day 14-18: The following week, patients rhGH (Saizen™, Serono International, Geneva, Switzerland) 4mg/day self-administered SC.

Further vaccine boosters are given on day 42 and day 84. GTU-MultiHIV B clade vaccine 1mg/ml being administered as 10 intradermal injections of 100 µl/injection.

Group Type: EXPERIMENTAL

GTU-MultiHIV B clade vaccine1mg

Intervention Type: BIOLOGICAL

Dose given is 1mg/ml administered as 10 intradermal injections of 100 µl/injection distributed as 5 intradermal injections /left and right arm

Interleukin-2

Intervention Type: DRUG

5 Million Units administered twice daily for 5 days by subcutaneous injection on days 7, 8, 9, 10, and 11 after first vaccination. .

GM-CSF

Intervention Type: DRUG

150 ug administered subcutaneously once daily 4 hours from IL-2 injections

Growth Hormone

Intervention Type: DRUG

4mg/day will be self administered by Subcutaneous injection for 5 days on days 14, 15, 16, 17 and 18 following first vaccination

Vaccine alone

Day 0: Patients are given GTU-MultiHIV B clade vaccine 1mg/ml administered as 10 intradermal injections of 100 µl/injections.

Day 42: GTU-MultiHIV B clade vaccine as day 0.

Day 84: GTU-MultiHIV B clade vaccine as day 0.

Group Type: ACTIVE_COMPARATOR

GTU-MultiHIV B clade vaccine1mg

Intervention Type: BIOLOGICAL

Dose given is 1mg/ml administered as 10 intradermal injections of 100 µl/injection distributed as 5 intradermal injections /left and right arm

Cytokines alone

Day 7-11: One week following this, patients receive a 5 day course of Cytokines: Aldesleukin (IL-2) Novartis UK (BD; 8 hours apart) 5 million units administered by SC injection. Sargramostim (GM-CSF) - Leukine™, Berlex Seattle US 150ug SC once daily 4 hours from rhIL-2 injections.

Day 14-18: The following week, patients rhGH (Saizen™, Serono International, Geneva, Switzerland) 4mg/day self-administered SC.

Group Type: ACTIVE_COMPARATOR

Interleukin-2

Intervention Type: DRUG

5 Million Units administered twice daily for 5 days by subcutaneous injection on days 7, 8, 9, 10, and 11 after first vaccination. .

GM-CSF

Intervention Type: DRUG

150 ug administered subcutaneously once daily 4 hours from IL-2 injections

Growth Hormone

Intervention Type: DRUG

4mg/day will be self administered by Subcutaneous injection for 5 days on days 14, 15, 16, 17 and 18 following first vaccination

Interventions

GTU-MultiHIV B clade vaccine1mg

Dose given is 1mg/ml administered as 10 intradermal injections of 100 µl/injection distributed as 5 intradermal injections /left and right arm

Intervention Type: BIOLOGICAL

Interleukin-2

5 Million Units administered twice daily for 5 days by subcutaneous injection on days 7, 8, 9, 10, and 11 after first vaccination. .

Intervention Type: DRUG

GM-CSF

150 ug administered subcutaneously once daily 4 hours from IL-2 injections

Intervention Type: DRUG

Growth Hormone

4mg/day will be self administered by Subcutaneous injection for 5 days on days 14, 15, 16, 17 and 18 following first vaccination

Intervention Type: DRUG

Other Intervention Names

Aldesleukin; Proleukin; Sargramostim; Leukine; Serono International, Geneva, Switzerland

Eligibility Criteria

Inclusion Criteria

• Documented HIV-1 positive result.
• Stable on HAART.
• Two screening viral loads of <50 cps/ml on 2 consecutive occasions at least one month apart.
• CD4 T cell count of >400 cells/ul.
• Nadir CD4 T cell count of >200 cells/ul.
• Over 18 years of age.
• Willing and able to provide informed consent.
• Female subjects must not be pregnant or lactating.
• Subjects must be using adequate double barrier method of contraception as appropriate.

Exclusion Criteria

• Prior therapeutic vaccination.
• Acute illness within 2 weeks of the start of the study.
• Prior immunomodulatory therapy (e.g. IL-2, rhGH, GCSF, GM-CSF, HU)
• Receiving immunosuppressive medication (e.g. Steroids)
• Participation in other vaccine trials currently
• Patients with diabetes mellitus type 2
• Patients with cardiac abnormalities
• Patients with pre-existing autoimmune disease
• Patients with active neoplasia
• Patients with evidence of any progression or recurrence of an underlying intra-cranial lesion

• Minimum Eligible Age: 18 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

Medical Research Council

OTHER_GOV

Sponsor Role: collaborator

Imperial College London

OTHER

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Principal Investigators

Nesrina Imami, MD/PhD

Role: PRINCIPAL_INVESTIGATOR

Imperial College London

Locations

St. Stephen's AIDS Trust

London, , United Kingdom

Countries

United Kingdom

References

Herasimtschuk A, Downey J, Nelson M, Moyle G, Mandalia S, Sikut R, Adojaan M, Stanescu I, Gotch F, Imami N. Therapeutic immunisation plus cytokine and hormone therapy improves CD4 T-cell counts, restores anti-HIV-1 responses and reduces immune activation in treated chronic HIV-1 infection. Vaccine. 2014 Dec 5;32(51):7005-7013. doi: 10.1016/j.vaccine.2014.09.072. Epub 2014 Oct 22.

Reference Type: DERIVED

PMID: 25454870 (View on PubMed)

Related Links

http://www1.imperial.ac.uk/departmentofmedicine/divisions/infectiousdiseases/immuno/candw/immreconhiv/

research team web page

Other Identifiers

G0501957

Identifier Type: OTHER_GRANT

Identifier Source: secondary_id

2008-000575024

Identifier Type: REGISTRY

Identifier Source: secondary_id

CRO930

Identifier Type: -

Identifier Source: org_study_id