Phase 2a Trial to Evaluate Safety and Immunogenicity of COVID-19 Vaccine Strategies in HIV-infected/Uninfected Adults.

Phase 2Active Not RecruitingNCT05515042

The Aurum Institute NPC694 enrolled

Overview

This is a multicenter, randomized, observer blind clinical trial. A total of 750 evaluable HIV-infected (660) and HIV-uninfected (90) adult participants meeting all entry criteria (all inclusion and no exclusion criteria) will be enrolled in 3 treatment strategies in 3 participant groups dependent on prior vaccination with a single dose Janssen (Group 1), 2 doses of Pfizer (Group 2) or no prior COVID-19 vaccination with evidence of prior SARS-CoV-2 infection (Group 3) .A total of 300 participants per group will be enrolled in Groups 1 and 2 (255 HIV-infected and 45 HIV-uninfected per group), and 150 HIV-infected, unvaccinated participants in Group 3. Each treatment regimen (Vaccine Arm: A, B or C) will evaluate 250 participants. Groups 1 and 2 will enrol 85 HIV-infected and 15 HIV-uninfected per vaccine arm.

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

PREVENTION

Masking

DOUBLE

Enrollment

694

Conditions

COVID-19

Interventions

Eligibility

Sex: ALLMin age: 18 YearsMax age: 100 YearsHealthy volunteers:

Medical Language ↔ Plain English

Inclusion Criteria: 1. . Adult male or female aged 18 and above at the time of written informed consent 2. . Willing and able to give written informed consent 3. . HIV-infected persons on ART for at least three months prior to enrollment, or HIV-uninfected persons 4. . Able to provide evidence of completing a primary COVID-19 vaccination regimen with either a single dose of Ad26.COV2.S or two doses of BNT162b2 at least two months prior to enrolment, or HIV-infected with no prior COVID-19 vaccination and evidence of prior SAR-CoV-2 infection 5. . Residing in the vicinity of the clinical trial site and planning to remain in the area of the study for 12months 6. . Able and willing to participate for the duration of the study visits and follow-up 7. . Willing to provide verifiable identification (eg. Identity document, passport) at study entry and follow-up visits Exclusion Criteria: 1. . Positive SARS-CoV-2 PCRor antigen detection test 2. . Persons with undocumented HIV status 3. . HIV-infected persons with CD4count \<1 00 cells/mm3and/or Viral Load \> 1000 copies/ml 4. . Known allergy or history of anaphylaxis or other serious adverse reactions to specific COVID-19 vaccine constituents 5. . History of capillary leak syndrome, thrombosis with thrombocytopenia syndrome (TTS), heparin-induced thrombocytopenia (HIT), history of any neurological disorders or seizures including Guillain-Barré syndrome, with the exception of febrile seizures during childhood 6. . Participants with acute illness (this does not include minor illnesses such as diarrhoea or mild upper respiratory tract infection) or body temperature ≥38.0ºC on Day 1 will be excluded from randomization at that time but may be rescheduled for randomization and/or vaccination at a later date. 7. . Participants who cannot communicate reliably with the investigator 8. . Pregnant or breastfeeding 9. . Women of childbearing potential who are not on an effective long-acting contraceptive method for at least 21 days prior to enrollment (date of signed informed consent) and not intending to continue contraception for up to 9 months post first vaccination.(See Section 10.5.1 below) 10. . Prior administration of an investigational coronavirus vaccine (for example, SARS-CoV-2, SARS-CoV, Middle East Respiratory Syndrome \[MERS-CoV\] vaccine), except for participants of the Sisonke trial 11. . Prior administration of any SARS-CoV-2 vaccine boost 12. . Has a medical, psychiatric, or occupational condition that may pose additional risk as a result of participation, or that could interfere with safety assessments or interpretation of results according to the Investigator's judgment 13. . History of harmful substance or alcohol use within the past 2 years. This exclusion does not apply to cannabis use. 14. . Receipt of: 1. . Systemic immunosuppressants or immune-modifying drugs for \>14 days in total within 6 months prior to the day of randomization (for corticosteroids, ≥20 mg/day prednisone equivalent). Topical tacrolimus is allowed if not used within 14 days prior to the day of randomization. Inhaled, nasal, and topical steroids are allowed. 2. . Intravenous blood products (red cells, platelets, immunoglobulins, monoclonal antibodies specific for SARS-CoV-2) within 3 months prior to enrollment 3. . Experimental vaccine within the past 6 months before first vaccination 4. . Any inactivated vaccines received within 14 days prior to first vaccination or planned within 14 days of first vaccination, or live attenuated vaccines received with 30 days prior to the first vaccination or planned within 30 days of the first vaccination. 15. . Participated in an interventional clinical study within 28 days prior to the Screening Visit (Day 1) or plans to do so while participating in this study. 16. . Employee of the investigator or study site, with direct involvement in the proposed study or other studies under the direction of that investigator or study site, as well as family members of the employees or the investigator.

Locations (5)

The Aurum Institute: Pretoria Clinical Research Centre

Pretoria, Gauteng, South Africa

The Aurum Institute: Tembisa Clinical Research Centre, Clinic 4

Tembisa, Gauteng, South Africa

The Aurum Institute: Tembisa Clinical Research Centre

Tembisa, Gauteng, South Africa

The Aurum Institute: Gavin J Churchyard Legacy Centre

Klerksdorp, North West, South Africa

The Aurum Institute: Rustenburg Clinical Research Centre

Rustenburg, North West, South Africa

Outcomes

Primary Outcomes

Primary Objective and Endpoint/Outcome 1:

In HIV-infected persons, to determine whether each boost vaccine regimen adequately boosts humoral immune responses (D15), overall and by prior vaccine regimen. In this case humoral response refers to SARS CoV-2 spike RBD protein-specific binding antibody (bAb) IgG and SARS CoV-2-specific neutralizing antibody (nAb). Endpoint/Outcome 1: • Geometric mean value of SARS CoV-2 spike RBD protein-specific binding antibody (bAb) at baseline and D15, where bAb is measured from serum using an ELISA-based antibody binding assay to the SARS-CoV-2 RBD protein. The ELISA-based antibody binding assay to the SARS-CoV-2 RBD protein will be used to measure the serum bAb concentrations. The bAb concentrations will be derived from the half-maximal Effective Concentration (EC50) and the Area under the curve (AUC), and summarised as the Geometric mean value of bAb

Time frame: 14 Months

Primary Objective and Endpoint/Outcome 2:

In HIV-infected persons, to determine whether each boost vaccine regimen adequately boosts humoral immune responses (D15), overall and by prior vaccine regimen. In this case humoral response refers to SARS CoV-2 spike RBD protein-specific binding antibody (bAb) IgG and SARS CoV-2-specific neutralizing antibody (nAb). Endpoint/Outcome 2: • Geometric mean value of SARS CoV-2-specific neutralizing antibody (nAb) at baseline and D15 where nAb is measured from serum using a pseudovirus neutralizing assay. The SARS-CoV-2 VSV pseudotyped virus-based assay will be used measure the serum nAb concentrations. The nAb concentrations will be derived from Half-maximal inhibitory concentration (IC50), and summarised as the Geometric mean value of nAb

Time frame: 14 Months

Secondary Outcomes

Secondary Objective 1 and Endpoint/Outcome 1:

In HIV-infected persons, to compare between Vaccine Arms (A, B, or C) humoral immune responses post boost vaccination (Day 15 and Months 6 and 12), overall and stratified by primary vaccination regimen, duration since primary vaccination, and age group. In this case humoral response refers to SARS CoV-2 spike RBD protein-specific binding antibody (bAb) and SARS CoV-2-specific neutralizing antibody (nAb). Endpoint/Outcome 1: • The ELISA-based antibody binding assay to the SARS-CoV-2 RBD protein will be used to measure the serum bAb concentrations. Geometric mean value of SARS CoV-2 spike RBD protein-specific binding antibody (bAb) at Day 15 and Months 6 and 12 is determined from the half-maximal Effective Concentration (EC50) and the Area under the curve (AUC)

Time frame: 14 Months

Secondary Objective 1 and Endpoint/Outcome 2:

In HIV-infected persons, to compare between Vaccine Arms (A, B, or C) humoral immune responses post boost vaccination (Day 15 and Months 6 and 12), overall and stratified by primary vaccination regimen, duration since primary vaccination, and age group. In this case humoral response refers to SARS CoV-2 spike RBD protein-specific binding antibody (bAb) and SARS CoV-2-specific neutralizing antibody (nAb). Endpoint/Outcome 2: • The SARS-CoV-2 VSV pseudotyped virus-based assay will be used measure the serum nAb concentrations. Geometric mean value of SARS CoV-2-specific neutralizing antibody (nAb) at Day 15 and Months 6 and 12 as measured by the half-maximal inhibitory concentration (IC50)

Time frame: 14 Months

Secondary Objective 2 and Endpoint/Outcome 1:

In HIV-infected persons, to describe the safety of each COVID-19 boost vaccine regimen. In this study safety is measured by moderate or severe solicited local and systemic adverse event (AE), serious adverse events (SAEs), medically attended AEs (MAAEs), or adverse events of special interest (AESI) Endpoint/Outcome 1: • Solicited local and systemic adverse events (AEs) within 7 days after each vaccine dose. The proportion of participants with at least one moderate or severe solicited local and systemic adverse event (AE) within 7 days after each vaccine dose, presented by study arm

Time frame: 14 Months

Secondary Objective 2 and Endpoint/Outcome 2:

In HIV-infected persons, to describe the safety of each COVID-19 boost vaccine regimen. In this study safety is measured by moderate or severe solicited local and systemic adverse event (AE), serious adverse events (SAEs), medically attended AEs (MAAEs), or adverse events of special interest (AESI) Endpoint/Outcome 2: • Unsolicited AEs within 28 days after each vaccine dose. The proportion of participants with at least one unsolicited AE within 28 days after each vaccine dose presented by study arm and stratified per study group

Time frame: 14 Months

Secondary Objective 2 and Endpoint/Outcome 3:

In HIV-infected persons, to describe the safety of each COVID-19 boost vaccine regimen. In this study safety is measured by moderate or severe solicited local and systemic adverse event (AE), serious adverse events (SAEs), medically attended AEs (MAAEs), or adverse events of special interest (AESI) Endpoint/Outcome 3: • The frequency of Serious adverse events (SAEs), medically attended AEs (MAAEs), or adverse events of special interest (AESI) from the first vaccine dose for up to 12 months after the last vaccine dose, presented by study arm and stratified per study group

Time frame: 14 Months

Secondary Objective 3 and Endpoint/Outcome 1:

In HIV-infected persons, to compare between Vaccine Arms (A, B, or C) the cellular immunogenicity post boost (D15 and months six and twelve), overall and stratified by primary vaccination regimen, duration since primary vaccination and age group. In this study cellular immunogenicity is measured by SARS CoV-2 specific CD4+ and CD8+ T-cell responses using ELISpot and flow cytometry from peripheral blood mononuclear cells. Endpoint/Outcome 1: • The SARS CoV-2 specific T-cell responses will be measured by the IFN-gamma ELISpot assay. In this study the outcome measure for IFN-gamma ELISpot is Spot Forming Units per 10\^6 cells.

Time frame: 14 Months

Secondary Objective 3 and Endpoint/Outcome 2:

In HIV-infected persons, to compare between Vaccine Arms (A, B, or C) the cellular immunogenicity post boost (D15 and months six and twelve), overall and stratified by primary vaccination regimen, duration since primary vaccination and age group. In this study cellular immunogenicity is measured by SARS CoV-2 specific CD4+ and CD8+ T-cell responses using ELISpot and flow cytometry from peripheral blood mononuclear cells. Endpoint/Outcome 2: • The SARS CoV-2 specific CD4+ and CD8+ T-cell response will be measured by flow cytometry. The outcome measure for flow cytometry is the percentage T cell responses for the following cytokines: IFN-γ, IL-2, TNF-α and Granzyme B

Time frame: 14 Months