Study to Evaluate Immunological Equivalence Between Two Investigational Influenza Vaccines in Adults (H1N1)

Study Overview
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Brief Summary
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The primary purpose of the study is to assess the equivalence of the immune response elicited by two GSK Biologicals' adjuvanted influenza investigational vaccines (GSK2340272A and GSK2340274A) in adults aged 18 to 60 years. The second purpose of the study is to evaluate the safety and reactogenicity of these two vaccines.

Detailed Description
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This Protocol Posting has been updated following Protocol Amendment 4, July 2010, leading to removal of one of the secondary outcome measures.

Official Title
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Immunological Equivalence Between GSK2340272A and GSK2340274A Influenza Vaccines in Adults Aged 18 to 60 Years

Conditions
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Influenza

Intervention / Treatment
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* Biological: Influenza vaccine GSK2340272A
* Biological: Influenza vaccine GSK2340274A


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Male or female aged 18 to 60 years inclusive, at the time of the first vaccination. Subjects who the investigator believes that they can and will comply with the requirements of the protocol. Written informed consent obtained from the subject. Satisfactory baseline medical assessment by history and physical examination. Access to a consistent means of telephone contact, which may be either in the home or at the workplace, land line or mobile, but NOT a pay phone or multiple-user device Females of non-childbearing potential may be enrolled in the study. Female of childbearing potential may be enrolled in the study, if she: has practiced adequate contraception for 30 days prior to vaccination, and has a negative pregnancy test on the day of vaccination, and has agreed to continue adequate contraception during the entire treatment period and for 2 months after completion of the vaccination series. Exclusion Criteria: Use of any investigational or non-registered product other than the study vaccine within 30 days preceding the first dose of the study vaccine or planned use during the study period. Presence of evidence of substance abuse or of neurological or psychiatric diagnoses which, although stable, are deemed by the investigator to render the potential subject unable/unlikely to provide accurate safety reports. Presence of an axillary temperature >= 37.5°C (99.5°F), or acute symptoms greater than mild severity on the scheduled date of first vaccination. NOTE: The subject may be vaccinated at a later date, provided symptoms have resolved, vaccination occurs within the window specified by the protocol, and all other eligibility criteria continue to be satisfied. Clinically or virologically confirmed influenza infection within 6 months preceding the study start. Diagnosed with cancer, or treatment for cancer, within 3 years. Any confirmed or suspected immunosuppressive or immunodeficient condition including history of human immunodeficiency virus (HIV) infection. Clinically or virologically confirmed influenza infection within 6 months preceding the study start. Chronic administration of immunosuppressants or other immune modifying drugs within 6 months of study enrolment or planned administration during the study period. Receipt of any immunoglobulins and/or any blood products within 3 months of study enrolment or planned administration of any of these products during the study period. Any significant disorder of coagulation or treatment with warfarin derivatives or heparin. An acute evolving neurological disorder or history of Guillain-Barré syndrome. Administration of any vaccines within 30 days before vaccination. Any known or suspected allergy to any constituent of influenza vaccines; a history of anaphylactic-type reaction to any constituent of influenza vaccines; or a history of severe adverse reaction to a previous influenza vaccine. Pregnant or lactating female Female planning to become pregnant or planning to discontinue contraceptive precautions. Any conditions which, in the opinion of the investigator, prevents the subjects from participating in the study.

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 60 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: Double


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: GSK2340272A GROUP<br>Healthy male or female adults, between and including 18 to 60 years of age, who received two doses of GSK2340272A vaccine, administered intramuscularly in the deltoid region of the non-dominant arm at Day 0 and of the dominant arm at Day 21. | Biological: Influenza vaccine GSK2340272A<br>* Two intramuscular injections at Day 0 and Day 21<br>|
| Experimental: GSK2340274A GROUP<br>Healthy male or female adults, between and including 18 to 60 years of age, who received two doses of GSK2340274A vaccine, administered intramuscularly in the deltoid region of the non-dominant arm at Day 0 and of the dominant arm at Day 21. | Biological: Influenza vaccine GSK2340274A<br>* Two intramuscular injections at Day 0 and Day 21<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Titers for Serum Hemagglutination Inhibition (HI) Antibodies Against Flu A/CAL/7/09 Strain of Influenza Disease | Titers are presented as geometric mean titers (GMTs). The flu strain assessed was Flu A/CAL/7/09. The reference seropositivity cut-off value was greater than or equal to (≥) 1:10. | At Day 21 | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Number of Seroconverted (SCR) Subjects for HI Antibodies | Seroconversion was defined as: For initially seronegative subjects [antibody titer below (<) 1:10 prior to vaccination], antibody titer greater than or equal to (≥) 1:40 after vaccination; For initially seropositive subjects (antibody titer ≥ 1:10 prior to vaccination), antibody titer after vaccination ≥ 4 fold the pre-vaccination antibody titer. The Flu strain assessed was A/California/7/2009 (H1N1)v-like influenza (Flu A/CAL/7/09). | At Days 21 and 42 | 
| Number of SCR Subjects for HI Antibodies | Seroconversion was defined as: For initially seronegative subjects [antibody titer below (<) 1:10 post to vaccination], antibody titer greater than or equal to (≥) 1:40 after vaccination; For initially seropositive subjects (antibody titer ≥ 1:10 prior to vaccination), antibody titer after vaccination ≥ 4 fold the pre-vaccination antibody titer. The Flu strain assessed was A/California/7/2009 (H1N1)v-like influenza (Flu A/CAL/7/09). | At Days 182 and 364 | 
| Titers for Serum HI Antibodies Against Flu A/CAL/7/09 Strain of Influenza Disease | Titers are presented as geometric mean titers (GMTs). The flu strain assessed was Flu A/CAL/7/09. The reference seropositivity cut-off value was ≥ 1:10. | At Days 0 and 42 | 
| Titers for Serum HI Antibodies Against Flu A/CAL/7/09 Strain of Influenza Disease | Titers are presented as geometric mean titers (GMTs). The flu strain assessed was Flu A/CAL/7/09. The reference seropositivity cut-off value was ≥ 1:10. | At Days 182 and 364 | 
| Number of Subjects Who Were Seroprotected for HI Antibodies Against the Flu A/California/7/2009 (H1N1) Virus Strain | A seroprotected subject was defined as a vaccinated subject with a serum HI titer greater than or equal to (≥) 1:40, that usually is accepted as indicating protection. | At Days 0, 21 and 42 | 
| Number of Subjects Who Were Seroprotected for HI Antibodies Against the Flu A/California/7/2009 (H1N1) Virus Strain | A seroprotected subject was defined as a vaccinated subject with a serum HI titer greater than or equal to (≥) 1:40, that usually is accepted as indicating protection. | At Days 182 and 364 | 
| Geometric Mean Fold Rise (GMFR) for HI Antibodies Against Flu A/CAL/7/09 Strain of Influenza Disease | GMFR was defined as the fold increase in serum HI geometric mean titers (GMTs) post-vaccination compared to pre-vaccination. The flu strain assessed was Flu A/CAL/7/09. | At Days 21 and 42 | 
| Geometric Mean Fold Rise (GMFR) for HI Antibodies Against Flu A/CAL/7/09 Strain of Influenza Disease | GMFR was defined as the fold increase in serum HI geometric mean titers (GMTs) post-vaccination compared to pre-vaccination. The flu strain assessed was Flu A/CAL/7/09. | At Days 182 and 364 | 
| Number of Subjects With Any and Grade 3 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. | During the 7-day (Days 0-6) post-vaccination period following each dose and across doses | 
| Number of Days With Solicited Local Symptoms | The number of days with any solicited local symptoms reported during the solicited post-vaccination period. | During the 7-day (Days 0-6) post-vaccination period following each dose and across doses | 
| Number of Subjects With Any, Grade 3 and Related Solicited General Symptoms | Assessed solicited general symptoms were fatigue, headache, joint pain at other location, muscle aches, shivering, sweating and fever [defined as axillary temperature equal to or above (≥) 37.5 degrees Celsius (°C)]. Any = occurrence of the symptom regardless of intensity grade or relationship to vaccination. Grade 3 symptom = general symptom that prevented normal everyday activities as assessed by inability to attend/do work or school, or required intervention of a physician/healthcare provider. Grade 3 fever = temperature > 39.0 °C and ≤ 40°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 Days With Solicited General Symptoms | The number of days with any solicited general symptoms reported during the solicited post-vaccination period. | During the 7-day (Days 0-6) post-vaccination period following each dose and across doses | 
| Number of Subjects With Potential Immune-mediated Diseases (pIMDs) | A pIMD was defined as an AE including autoimmune diseases and other mediated inflammatory disorders and assessed by the investigator as specific to the treatment administration. | From Day 0 up to Day 42 | 
| Number of Subjects With pIMDs | A pIMD was defined as an AE including autoimmune diseases and other mediated inflammatory disorders and assessed by the investigator as specific to the treatment administration. | During the entire study period (from Day 0 up to Day 364) | 
| Number of Subjects With Any Adverse Event of Special Interest (AESIs) | An AESI was defined as an AE including autoimmune diseases and other mediated inflammatory disorders and assessed by the investigator as specific to the treatment administration. | During the entire study period (from Day 0 up to Day 364) | 
| Number of Subjects With Any, Grade 3 and Related 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 outside 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. Grade 3 AE = an AE which prevented normal, everyday activities. Related = AE assessed by the investigator as related to the vaccination. | Within 21 days after the first vaccination (Days 0 - 20) and 63 days after the second vaccination (up to Day 84) | 
| Number of Subjects With Serious Adverse Events (SAEs) | SAEs assessed include medical occurrences that result in death, are life-threatening, require hospitalization or prolongation of hospitalization or result in disability/incapacity. | During the entire study period (from Day 0 up to Day 364) | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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influenza infection, GSK Biologicals' influenza vaccine GSK2340272A and GSK2340274A