A Clinical Phase 3 Trial of VLA1553 in Adult Participants with Human Immunodeficiency Virus (HIV)

Valneva

Status and phase

Withdrawn

Phase 3

Conditions

Chikungunya Virus Infection

Treatments

Biological: VLA1553

Study type

Interventional

Funder types

Industry

Identifiers

NCT06028841

VLA1553-304

Details and patient eligibility

About

This was a phase 3 clinical study to evaluate the safety, tolerability, and immunogenicity of VLA1553 in moderately immunocompromised adults with HIV infection.

Full description

This was a multicenter, prospective, open-label, uncontrolled, single arm, phase 3 clinical study evaluating the final dose of VLA1553. The safety, tolerability, and immunogenicity of VLA1553 should have been assessed in moderately immunocompromised adult participants infected with HIV living in CHIKV endemic areas. Approximately 75 male and female adults (aged 18 years or above) infected with HIV should have been enrolled. Participants would have been screened by ELISA for evidence of previous CHIKV exposure excluding CHIKV seropositive participants from study participation.

Sex

All

Ages

18+ years old

Volunteers

No Healthy Volunteers

Inclusion criteria

Participants who met ALL of the following criteria were eligible for this study:

Adult participant aged 18 years or above infected with HIV of either gender
Participant has an understanding of the study and its procedures, agrees to its provisions, and voluntarily gives written informed consent prior to any study-related procedures
Stage of disease A1, A2, B1 or B2 according to the revised CDC classification system for HIV infection from 1993 or Stages 1 or 2 in the absence of AIDS defining conditions (CDC update from 1994)
Participants are recruited in Cohorts:
1. For Cohort I:
  
  Participant has CD4+ T cell counts >350-≤400 cells/μL, is receiving antiretroviral therapy (ART) for at least 6 months and plasma HIV RNA < 400 copies/ mL prior enrollment
2. For Cohort II:
Participant has CD4+ T cell counts >200 cells/μL (no upper limit), is receiving ART for at least 3 months and plasma HIV RNA < 50 copies/ mL prior enrollment
Participant is seronegative for previous CHIKV exposure (i.e. IgM- and IgG-) as screened by CHIKV-specific ELISA
If female participant is of childbearing potential:
1. Participant has a negative urine pregnancy test at screening (Visit 0) or Day 1 (Visit 1), respectively
2. Participant has practiced an adequate method of contraception during the 30 days before screening (Visit 0)
3. Participant agrees to employ adequate birth control measures for the first three months post-vaccination (i.e. until Day 85, Visit 6).
Female/male participant agrees to employ adequate birth control measures for the first three months post-vaccination (i.e., until Day 85, Visit 7)

Exclusion criteria

Participants who met ANY of the following criteria were NOT eligible for this study:

Participant is taking medication or other treatment for unresolved symptoms attributed to a previous CHIKV infection; or has participated in a clinical study involving an investigational CHIKV vaccine
Participant has an acute or recent infection (and who is not symptom-free in the week prior to the Screening Visit (Visit 0) and Visit 1)
Participant tests positive for human immunodeficiency virus (HIV) and fulfills AIDS indicator T cell counts or AIDS indicator conditions (disease stages C1, C2 or C3 or stage
Participant tests positive for HIV with the actual target disease stages A1, A2, B1 or B2 (or stage 1 or 2), but was classified in the past at least once as fulfilling AIDS indicator conditions (disease stage C1, C2 or C3) or AIDS indicator T cell counts (CD4+ lymphocyte count <200/μL or CD4+ percentage <14%)
Participant tests PCR positive for active hepatitis B or hepatitis C virus (HCV)
Participant has received any vaccine within 28 days prior to vaccination in this study or plans to receive any vaccine within 28 days after vaccination
Participant has abnormal findings in any required study investigations (e.g. medical history, physical examination, and laboratory findings) considered clinically relevant by the Investigator and which pose a risk for participation in the study based on his/her judgement
Participant currently has or had a history of significant cardiovascular, respiratory, metabolic, neurological, hepatic, rheumatic, autoimmune, hematological, gastrointestinal or renal disorder (of note: Mild asthma that requires low dose corticosteroid inhalation only, during limited time periods of the year is not an exclusion criterion)
Participant has an abnormal, clinically significant 12-lead ECG at screening
Participant has a history of immune-mediated or clinically relevant arthritis/arthralgia
Participant has a history of malignancy
Participant has a known or suspected defect of the immune system that can be expected to influence the immune response to the vaccine other than asymptomatic or moderately symptomatic HIV infection, such as participants with congenital immunodeficiency, status post organ transplantation or immuno-suppressive therapy within four weeks prior to Visit 1. Immuno-suppressive therapy is defined as administration of chronic (longer than 14 days) prednisone or equivalent ≥0.05 mg/kg/day within 4 weeks prior to study entry, radiation therapy or immunosuppressive cytotoxic drugs/ monoclonal antibodies in the previous three years; topical and inhaled steroids are allowed
Participant has a history of any vaccine related contraindicating event (e.g., anaphylaxis, allergy to components of the candidate vaccine, other known contraindications including febrile convulsions)
Participant presents with clinical conditions representing a contraindication to intramuscular vaccination and blood draws
Participant is pregnant (positive urine pregnancy test at screening or Visit 1, respectively), is lactating at the time of enrollment, has plans to become pregnant or subject's female partner plans to become pregnant during the first three months post-vaccination or practices unreliable contraception
Participant received blood-derived products (e.g. plasma) within 90 days prior to vaccination in this study
Participant has a rash, dermatological condition or tattoos that would, in the opinion of the Investigator, interfere with injection site reaction rating
Participant has participated in another clinical study involving an investigational medicinal product (IMP) or device within 30 days prior to vaccination or is scheduled to participate in another clinical study involving an IMP, or device during the course of this study
Participant is a member of the team conducting the study or in a dependent relationship with one of the study team members. Dependent relationships include close relatives (i.e., children, partner/spouse, siblings, parents) as well as employees of the Investigator or site personnel conducting the study.