A Study to Assess the Safety, Reactogenicity and Immunogenicity of GlaxoSmithKline (GSK) Biologicals' RSV Investigational Vaccine (ChAd155-RSV) (GSK3389245A) in Healthy Adults

Study Overview
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Brief Summary
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The purpose of this first time in human (FTiH) study is to assess the safety, reactogenicity and immunogenicity of 2 doses of the RSV investigational vaccine, when administered intramuscularly according to a 0, 1 month schedule, in healthy adults aged 18 to 45 years.

Official Title
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A Study to Evaluate Safety, Reactogenicity and Immunogenicity of GSK Biologicals' RSV Investigational Vaccine Based on Viral Proteins Encoded by Chimpanzee-derived Adenovector (ChAd155-RSV) (GSK3389245A) in Healthy Adults

Conditions
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Respiratory Synctial Virus Infections

Intervention / Treatment
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* Biological: GSK3389245A_LD GROUP
* Biological: GSK3389245A_HD GROUP
* Biological: Bexsero
* Drug: Placebo


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Subjects who, in the opinion of the investigator, can and will comply with the requirements of the protocol Written informed consent obtained from the subject prior to performing any study specific procedure A male or female between, and including, 18 and 45 years of age at the time of first vaccination Healthy subjects as established by medical history and clinical examination before entering into the study Female subjects of non-childbearing potential may be enrolled in the study Female subjects of childbearing potential may be enrolled in the study, if the subject: has practiced adequate contraception for 30 days prior to vaccination, and has a negative pregnancy test on the day of vaccina-tion, and has agreed to continue adequate contraception during the entire treatment period and for 2 months after completion of the vaccination series Exclusion Criteria: Concurrently participating in another clinical study, at any time during the study period, in which the subject has been or will be exposed to an investigational or a non-investigational vaccine/product Use of any investigational or non-registered product other than the study vaccines during the period starting 30 days before the first dose of study vaccines, or planned use during the study period Chronic administration of immunosuppressants or other immune-modifying drugs within 6 months prior to study vaccination, or planned administration during the study period Planned administration/administration of a vaccine not foreseen by the study protocol in the period starting 30 days before the first dose and ending 30 days after the last dose of vaccine administration, with the exception of any licensed influenza vaccine which may be administered ≥ 15 days before the first dose and ≥ 15 days after the last dose of study vaccine Administration of immunoglobulins and/or any blood products during the period starting 3 months before the first dose of study vaccines or planned administration during the study period Blood donation within 4 months prior to study entry or planned blood donation at any time during the study Previous vaccination against RSV Previous vaccination with a recombinant simian or human adenoviral vaccine Previous Bexsero or other vaccination against Neisseria meningitidis serogroup B History of or current autoimmune disease Family history of congenital or hereditary immunodefi-ciency History of any reaction or hypersensitivity likely to be exacerbated by any component of the study vaccines. History of any neurological disorders or seizures History of transient thrombocytopenia or neurological complications following any prior vaccination Hypersensitivity to latex Hypersensitivity to Bexsero's active substances or to any of its excipients Allergic reaction to kanamycin Any medical condition that in the judgment of the investi-gator would make intramuscular injection unsafe Any confirmed or suspected immunosuppressive or immunodeficient condition, based on medical history and physical examination Acute disease and/or fever at the time of enrolment Acute or chronic, clinically significant pulmonary, cardio-vascular, hepatic or renal functional abnormality, as de-termined by physical examination or laboratory screening tests Malignancy within previous 5 years or lymphoproliferative disorders Any clinically significant or any ≥ Grade 2 haematological laboratory abnormality Body mass index > 40 kg/m2 Current alcohol and/or drug abuse Pregnant or lactating female Any other condition that the investigator judges may interfere with study procedures or findings Planned move to a location that will prohibit participating in the trial until study end

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 45 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Prevention
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Triple


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: GSK3389245A_LD GROUP<br>Subjects in this group will receive 2 doses, one month apart of the GSK3389245A vaccine low dose | Biological: GSK3389245A_LD GROUP<br>* 2 doses administered intramuscularly at Day 0 and Day 30 in the deltoid region of the non-dominant arm<br>|
| Experimental: GSK3389245A_HD GROUP<br>Subjects in this group will receive 2 doses, one month apart, of the GSK3389245A vaccine high dose | Biological: GSK3389245A_HD GROUP<br>* 2 doses administered intramuscularly at Day 0 and Day 30 in the deltoid region of the non-dominant arm<br>|
| Active Comparator: Bexsero Group<br>Subjects in this group will receive 2 doses, one month apart, of Bexsero | Biological: Bexsero<br>* 2 doses administered intramuscularly at Day 0 and Day 30 in the deltoid region of the non-dominant arm<br>* Other names: Meningococcal group B Vaccine;|
| Placebo Comparator: Placebo Group<br>Subjects in this group will receive 2 doses, one month apart, of placebo | Drug: Placebo<br>* 2 doses administered intramuscularly at Day 0 and Day 30 in the deltoid region of the non-dominant arm<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Number of Subjects With Solicited Local Symptoms | Assessed solicited local symptoms were pain, redness and swelling. Any = occurrence of the symptom regardless of intensity grade. Grade 3 pain = pain that prevented normal activity. Grade 3 redness/swelling = redness/swelling spreading beyond 100 millimeters (mm) of injection site. All solicited local symptoms are considered as related to the vaccination. | During the 7-day (Days 0-6) post-vaccination period following each dose and across doses | 
| Number of Subjects With Solicited General Symptoms | Assessed solicited general symptoms were fatigue, fever [defined as oral temperature equal to or above (≥) 37.5 degrees Celsius (°C)] gastrointestinal symptoms (gastro) [nausea, vomiting, diarrhoea and/or abdominal pain] and headache. Any = occurrence of the symptom regardless of intensity grade and relationship to the vaccination. Grade 3 symptom = symptom that prevented normal activity. Grade 3 fever = fever > 39.5 °C. Related = symptom assessed by the investigator as related to the vaccination. | During the 7-day (Days 0-6) post-vaccination period following each dose and across doses | 
| Number of Subjects With Haematological and Biochemical Laboratory Abnormalities | Haematological/Biochemical parameters assessed were haemoglobin level [HgL], red blood cells [RBC], white blood cell [WBC], lymphocyte [LYM], neutrophil [NEU], eosinophil [EOS], reticulocyte [RET], platelet count [PLC], haptoglobin [Hpg], prothrombin time [PT] and partial thromboplastin time [PTT]. alanine aminotransferase [ALT], aspartate aminotransferase [AST], creatinine [CRE], lactate dehydrogenase [LDH] and bilirubin direct or total [BLD/BLT].Values were: unknown at baseline and below at Day 1 (U-B), unknown at baseline and within at Day 1 (U-W), unknown at baseline and above at Day 1 (U-A), below at baseline and below at Day 1 (B-B), below at baseline and within at Day 1 (B-W), below at baseline and above at Day 1(B-A), within at baseline and below at Day 1 (W-B), within at baseline and within at Day 1(W-W), within at baseline and above at Day 1(W-A), above at baseline and below at Day 1(A-B), above at baseline and within at Day 1 (A-W), above at baseline and above at Day 1(A-A) | At Day 1 | 
| Number of Subjects With Haematological and Biochemical Laboratory Abnormalities | Haematological/ Biochemical parameters assessed were haemoglobin level [HgL], red blood cell [RBC], white blood cell [WBC], lymphocyte [LYM], neutrophil [NEU], eosinophil [EOS], reticulocyte [RET], platelet count [PLC], haptoglobin [Hpg], prothrombin time [PT] and partial thromboplastin time [PTT]. alanine aminotransferase [ALT], aspartate aminotransferase [AST], creatinine [CRE], lactate dehydrogenase [LDH] and bilirubin direct or total [BLD/BLT].Values were: unknown at baseline and below at Day 3 (U-B), unknown at baseline and within at Day 3 (U-W), unknown at baseline and above at Day 3 (U-A), below at baseline and below at Day 3 (B-B), below at baseline and within at Day 3 (B-W), below at baseline and above at Day 3(B-A), within at baseline and below at Day 3 (W-B), within at baseline and within at Day 3(W-W), within at baseline and above at Day 3(W-A), above at baseline and below at Day 3(A-B), above at baseline and within at Day 3(A-W), above at baseline and above at Day 3(A-A). | At Day 3 | 
| Number of Subjects With Haematological and Biochemical Laboratory Abnormalities | Haematological/ Biochemical parameters assessed were haemoglobin level [HgL], red blood cell [RBC], white blood cell [WBC], lymphocyte [LYM], neutrophil [NEU], eosinophil [EOS], reticulocyte [RET], platelet count [PLC], haptoglobin [Hpg], prothrombin time [PT] and partial thromboplastin time [PTT]. alanine aminotransferase [ALT], aspartate aminotransferase [AST], creatinine [CRE], lactate dehydrogenase [LDH] and bilirubin direct or total [BLD/BLT].Values were: unknown at baseline and below at Day 7 (U-B), unknown at baseline and within at Day 7 (U-W), unknown at baseline and above at Day 7 (U-A), below at baseline and below at Day 7 (B-B), below at baseline and within at Day 7 (B-W), below at baseline and above at Day 7(B-A), within at baseline and below at Day 7 (W-B), within at baseline and within at Day 7(W-W), within at baseline and above at Day 7(W-A), above at baseline and below at Day 7(A-B), above at baseline and within at Day 7(A-W), above at baseline and above at Day 7(A-A). | At Day 7 | 
| Number of Subjects With Haematological and Biochemical Laboratory Abnormalities | Haematological/Biochemical parameters assessed were haemoglobin level [HgL], red blood cell [RBC], white blood cell [WBC], lymphocyte [LYM], neutrophil [NEU], eosinophil [EOS], reticulocyte [RET], platelet count [PLC], haptoglobin [Hpg], prothrombin time [PT] and partial thromboplastin time [PTT]. alanine aminotransferase [ALT], aspartate aminotransferase [AST], creatinine [CRE], lactate dehydrogenase [LDH] and bilirubin direct or total [BLD/BLT].Values were: unknown at baseline and below at Day 30(U-B), unknown at baseline and within at Day30(U-W), unknown at baseline and above at Day 30(U-A), below at baseline and below at Day30(B-B), below at baseline and within at Day30(B-W), below at baseline and above at Day 30(B-A), within at baseline and below at Day 30 (W-B), within at baseline and within at Day 30(W-W), within at baseline and above at Day30(W-A), above at baseline and below at Day30(A-B), above at baseline and within at Day30(A-W), above at baseline and above at Day30(A-A). | At Day 30 | 
| Number of Subjects With Haematological and Biochemical Laboratory Abnormalities | Haematological/Biochemical parameters assessed were haemoglobin level [HgL], red blood cell [RBC], white blood cell [WBC], lymphocyte [LYM], neutrophil [NEU], eosinophil [EOS], reticulocyte [RET], platelet count [PLC], haptoglobin [Hpg], prothrombin time [PT] and partial thromboplastin time [PTT]. alanine aminotransferase [ALT], aspartate aminotransferase [AST], creatinine [CRE], lactate dehydrogenase [LDH] and bilirubin direct or total [BLD/BLT].Values were: unknown at baseline and below at Day 31(U-B), unknown at baseline and within at Day31(U-W), unknown at baseline and above at Day 31(U-A), below at baseline and below at Day31(B-B), below at baseline and within at Day31(B-W), below at baseline and above at Day 31(B-A), within at baseline and below at Day 31(W-B), within at baseline and within at Day 31(W-W), within at baseline and above at Day31(W-A), above at baseline and below at Day31(A-B), above at baseline and within at Day31(A-W), above at baseline and above at Day31(A-A). | At Day 31 | 
| Number of Subjects With Haematological and Biochemical Laboratory Abnormalities | Haematological/Biochemical parameters assessed were haemoglobin level [HgL], red blood cell [RBC], white blood cell [WBC], lymphocyte [LYM], neutrophil [NEU], eosinophil [EOS], reticulocyte [RET], platelet count [PLC], haptoglobin [Hpg], prothrombin time [PT] and partial thromboplastin time [PTT]. alanine aminotransferase [ALT], aspartate aminotransferase [AST], creatinine [CRE], lactate dehydrogenase [LDH] and bilirubin direct or total [BLD/BLT].Values were: unknown at baseline and below at Day 33(U-B), unknown at baseline and within at Day33(U-W), unknown at baseline and above at Day 33(U-A), below at baseline and below at Day33(B-B), below at baseline and within at Day33(B-W), below at baseline and above at Day 33 (B-A), within at baseline and below at Day 33(W-B), within at baseline and within at Day 33(W-W), within at baseline and above at Day33(W-A), above at baseline and below at Day33(A-B), above at baseline and within at Day33(A-W), above at baseline and above at Day33(A-A). | At Day 33 | 
| Number of Subjects With Haematological and Biochemical Laboratory Abnormalities | Haematological/Biochemical parameters assessed were haemoglobin level [HgL], red blood cell [RBC], white blood cell [WBC], lymphocyte [LYM], neutrophil [NEU], eosinophil [EOS], reticulocyte [RET], platelet count [PLC], haptoglobin [Hpg], prothrombin time [PT] and partial thromboplastin time [PTT]. alanine aminotransferase [ALT], aspartate aminotransferase [AST], creatinine [CRE], lactate dehydrogenase [LDH] and bilirubin direct or total [BLD/BLT].Values were: unknown at baseline and below at Day 37(U-B), unknown at baseline and within at Day37(U-W), unknown at baseline and above at Day 37(U-A), below at baseline and below at Day37(B-B), below at baseline and within at Day37(B-W), below at baseline and above at Day 37(B-A), within at baseline and below at Day 37(W-B), within at baseline and within at Day 37(W-W), within at baseline and above at Day37(W-A), above at baseline and below at Day37(A-B), above at baseline and within at Day37(A-W), above at baseline and above at Day37(A-A). | At Day 37 | 
| Number of Subjects With Haematological and Biochemical Laboratory Abnormalities | Haematological/Biochemical parameters assessed were haemoglobin level [HgL], red blood cell [RBC], white blood cell [WBC], lymphocyte [LYM], neutrophil [NEU], eosinophil [EOS], reticulocyte [RET], platelet count [PLC], haptoglobin [Hpg], prothrombin time [PT] and partial thromboplastin time [PTT]. alanine aminotransferase [ALT], aspartate aminotransferase [AST], creatinine [CRE], lactate dehydrogenase [LDH] and bilirubin direct or total [BLD/BLT].Values were: unknown at baseline and below at Day 60(U-B), unknown at baseline and within at Day60(U-W), unknown at baseline and above at Day 60(U-A), below at baseline and below at Day60(B-B), below at baseline and within at Day60(B-W), below at baseline and above at Day60(B-A), within at baseline and below at Day 60(W-B), within at baseline and within at Day 60(W-W), within at baseline and above at Day60(W-A), above at baseline and below at Day60(A-B), above at baseline and within at Day60(A-W), above at baseline and above at Day60(A-A). | At Day 60 | 
| Number of Subjects With Haematological and Biochemical Laboratory Abnormalities | Haematological/Biochemical parameters assessed were haemoglobin level [HgL], red blood cell [RBC], white blood cell [WBC], lymphocyte [LYM], neutrophil [NEU], eosinophil [EOS], reticulocyte [RET], platelet count [PLC], haptoglobin [Hpg], prothrombin time [PT] and partial thromboplastin time [PTT], alanine aminotransferase [ALT], aspartate aminotransferase [AST], creatinine [CRE], lactate dehydrogenase [LDH] and bilirubin direct or total [BLD/BLT].Values were: unknown at baseline and below at Day180(U-B), unknown at baseline and within at Day180(U-W), unknown at baseline and above at Day180(U-A), below at baseline and below at Day180(B-B), below at baseline and within at Day180(B-W),below at baseline and above at Day180(B-A), within at baseline and below at Day180(W-B),within at baseline and within at Day180(W-W), within at baseline and above at Day180(W-A),above at baseline and below at Day180(A-B),above at baseline and within at Day180(A-W),above at baseline and above at Day180(A-A). | At Day 180 | 
| Number of Subjects With Haematological and Biochemical Laboratory Abnormalities | Haematological/Biochemical parameters assessed were haemoglobin level [HgL], red blood cell [RBC], white blood cell [WBC], lymphocyte [LYM], neutrophil [NEU], eosinophil [EOS], reticulocyte [RET], platelet count [PLC], haptoglobin [Hpg], prothrombin time [PT] and partial thromboplastin time [PTT], alanine aminotransferase [ALT], aspartate aminotransferase [AST], creatinine [CRE], lactate dehydrogenase [LDH] and bilirubin direct or total [BLD/BLT].Values were: unknown at baseline and below at Day360(U-B), unknown at baseline and within at Day360(U-W), unknown at baseline and above at Day360(U-A), below at baseline and below at Day360(B-B), below at baseline and within at Day360(B-W),below at baseline and above at Day360(B-A), within at baseline and below at Day360(W-B),within at baseline and within at Day360(W-W), within at baseline and above at Day360(W-A),above at baseline and below at Day360(A-B),above at baseline and within at Day360(A-W),above at baseline and above at Day360(A-A). | At Day 360 | 
| Number of Subjects With Haematological and Biochemical Results by Maximum Grade | Parameters analysed were ALT, activated partial thromboplastin time [APTT], AST, total bilirubin [TB], CRE, EOS, haemoglobin decrease [HgD], LYM, NEU, platelets [PLA], PT, white blood cells decrease [WBCD] and white blood cells increase [WBCI]. Assessed grades were: Unknown [UG], grade 0 [G0] = no grade, 1 [G1] = mild grade, 2 [G2] = moderate grade, 3 [G3] = severe grade, 4 [G4] = potentially life threatening and overall grading [GTotal]. Parameter grade combinations expressed were: parameter plus UG/G0/1/2/3/4/Total at baseline versus grading G0/1/2/3/4/Total from Day 1 up to Day 60, for the same parameter, e.g. ALT G0-G2. | From Day 1 to Day 60 | 
| Number of Subjects With Unsolicited Adverse Events (AEs) | An unsolicited AE covers any untoward medical occurrence in a clinical investigation subject temporally associated with the use of a medicinal product, whether or not considered related to the medicinal product and reported in addition to those solicited during the clinical study and any solicited symptom with onset out-side the specified period of follow-up for solicited symptoms. Any was defined as the occurrence of any unsolicited AE regardless of intensity grade or relation to vaccination. | During the 30-day (Days 0-29) post-vaccination period | 
| Number of Subjects With Serious Adverse Events (SAEs) | Serious adverse events (SAEs) assessed include medical occurrences that result in death, are life threatening, require hospitalization or prolongation of hospitalization or result in disability/incapacity. | From Day 0 to Day 360 | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Number of Subjects With Haematological and Biochemical Results by Maximum Grade | Parameters analysed were ALT, activated partial thromboplastin time [APTT], AST, total bilirubin [TB], CRE, EOS, haemoglobin decrease [HgD], LYM, NEU, platelets [PLA], PT, white blood cells decrease [WBCD] and white blood cells increase [WBCI]. Assessed grades were: Unknown [UG], grade 0 [G0] = no grade, 1 [G1] = mild grade, 2 [G2] = moderate grade, 3 [G3] = severe grade, 4 [G4] = potentially life threatening and overall grading [GTotal]. Parameter grade combinations expressed were: parameter plus UG/G0/1/2/3/4/Total at baseline versus grading G0/1/2/3/4/Total from Day 1 up to Day 360, for the same parameter, e.g. ALT G0-G2. | From Day 1 up to Day 360 | 
| Anti-respiratory Syncytial Virus (RSV) Neutralizing Antibodies Titers | Serum neutralizing antibody titers were reported as the inverse of the serum dilution which yielded a 60% reduction in the number of viral plaques compared to virus control without serum (Estimated Dilution: ED60). Antibody titers were expressed as Geometric Mean Titers (GMTs). | At pre-vaccination (Day 0), post-Dose 1 (Day 30) and post-Dose 2 (Day 60) | 
| Number of Subjects With Anti-RSV Neutralizing Antibodies Above the Cut-off Value | Pre-defined cut-off values was higher than or equal to (≥) 8 ED60. | At pre-vaccination (Day 0), post-Dose 1 (Day 30) and post-Dose 2 (Day 60) | 
| Frequency of RSV Viral Protein F, N, M2-1 Specific Interferon-gamma (IFN-γ) Secreting T-cells | Interferon-gamma specific T-cells, expressed as T-cells per (/) million cells, were determined by the Enzyme Linked ImmunoSpot (ELISpot) assay. | At pre-vaccination (Day 0) and post-Dose 1 (Day 7, Day 30) and post-Dose 2 (Day 37, Day 60) | 
| Frequency of Anti-F Immunoglobulin g (IgG) and/or Immunoglobulin A (IgA) Antibody Secreting B-cells (ASC) | IgG/IgA antibody specific B-cells/ expressed as B-cells per million cells, were determined by the ELISpot assay. | At pre-vaccination (Day 0) and post-Dose 1 (Day 7, Day 30) and post-Dose 2 (Day 37, Day 60) | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Reactogenicity, Safety, Respiratory syncytial virus (RSV), Vaccine, Immunogenicity