Protocol No: ECCT/24/03/05 Date of Protocol: 30-06-2023

Study Title:

Long-Term Follow-Up of CAB LA for Participants in HPTN 083 and HPTN 084 CAB PrEP Studies at Risk of HIV Acquisition

Study Objectives:

Primary Objective: To describe new HIV infections in adult and adolescent participants at risk of HIV acquisition included in the HPTN 083 and HPTN 084 studies and their associated sub-studies.

Secondary Objective: To describe any serious adverse events (SAEs), Grade 3 and Grade 4 ISRs, and AEs leading to withdrawal in adult and adolescent participants included in the HPTN 083 and HPTN 084 studies and their associated sub-studies.

 

Laymans Summary:

CAB LA IM every 2 months is approved in some countries as PrEP to reduce the risk of sexually acquired HIV in at-risk individuals. While awaiting approval and general availability of injectable cabotegravir for HIV prevention, there is, need to ensure continuous availability of an effective product among study participants who have benefited from it within the study context, while also evaluating long-term effects of CAB-LA. The purpose of this study is long-term evaluation of eligible participants who have completed US National Institute of Health sponsored pre-exposure prophylaxis (PrEP) study (HPTN 084) at the KEMRI Kisumu site. All participant will be given access to the injectable product. Eligible participants will be HIV negative at the last visit in the parent study (HPTN 084) and will have  good tolerance to the injectable product. The Kisumu Clinical Research Site (CRS) will enroll up to 58 participants. Each participant will be followed up for a duration of up to 3 years. Participants will continue to receive injectable cabotegravir and be followed up for new HIV infections, adverse events, serious safety concerns, and reasons leading to withdrawal. While ensuring continued access, we anticipate that the study will provide evidence on long-term safety of injectable cabotegravir when used for HIV prevention.

Abstract of Study:

STUDY RATIONALE

The purpose of this study is to long-term evaluation of participants receiving CAB LA who are at risk of acquiring HIV and continue to benefit from CAB LA administration as evidenced by HIV negative status. Participants will transition from the DAIDS sponsored PrEP studies HPTN 083 and HPTN 084 parent studies and associated sub-studies. Participants will continue receiving CAB LA and be followed for new HIV diagnosis, and safety as specified in the protocol.

OBJECTIVES AND ENDPOINTS
Primary Objective: To describe new HIV infections in adult and adolescent participants at risk of HIV acquisition included in the HPTN 083 and HPTN 084 studies and their associated sub-studies.
Endpoint: Number and characteristics of new HIV infections, including detection of resistance to CAB while on study.
 
Secondary Objective: To describe any serious adverse events (SAEs), Grade 3 and Grade 4 ISRs, and AEs leading to withdrawal in adult and adolescent participants included in the HPTN 083 and HPTN 084 studies and their associated sub-studies.
Endpoint: Incidence and severity of serious adverse events, Grade 3 and Grade 4 ISRs, and any clinical or laboratory adverse events leading to discontinuation of CAB while on study.
 
OVERALL DESIGN
This is a non-randomized, open label, multi-center long-term follow-up study with one treatment arm. The purpose of this study is long-term evaluation of eligible participants, who have completed DAIDS sponsored parent studies HPTN 083 and HPTN 084, and associated sub-studies, for new HIV diagnosis, SAEs, Grade 3 and Grade 4 ISRs, and AEs leading to withdrawal.
 
All participants who meet the screening eligibility criteria will be allowed to enroll in this study, continue receiving CAB LA 600 mg (200 mg/mL) intramuscular injections, and will be considered evaluable. Based on the design of the parent studies, approximately 3500 participants at risk of acquiring HIV infection could enroll into this study.
 
Study participation will extend for up to 3 years or until CAB LA receives local regulatory approval (by country) and is available in those countries, or until other access occurs from another source (e.g., government programs, aid programs, assistance programs, commercial availability, etc.), or if the participant no longer benefits from CAB LA, or meets a protocol defined stopping criteria.