Safety and Immunogenicity Study of GSK Biologicals' Pandemic Influenza Candidate Vaccine (H1N1) (GSK2340272A)

GlaxoSmithKline210 enrolled

Overview

This trial is designed to assess the safety and immunogenicity of a prime-boost schedule of GSK Biologicals' investigational vaccine GSK2340272A in children aged between 3 and 17 years.

Study Type

INTERVENTIONAL

Allocation

Purpose

PREVENTION

Masking

NONE

Enrollment

210

Conditions

Influenza

Interventions

Pandemic influenza vaccine GSK2340272ABIOLOGICAL

Two primary intramuscular (IM) injections and a booster IM injection

Eligibility

Sex: ALLMin age: 3 YearsMax age: 17 YearsHealthy volunteers:

Medical Language ↔ Plain English

Inclusion Criteria: * Subjects who the investigator believes that their parent(s)/Legally Acceptable Representative(s) (LAR) can and will comply with the requirements of the protocol. * Children, male or female, aged between 3 and 17 years at the time of the first study vaccination. * Written informed consent obtained from the subject parent(s) or LAR(s) of the subject. Assent obtained from the subject when applicable. * Healthy children as established by medical history and clinical examination when entering into the study. * Parent/LAR with access to a consistent means of telephone contact, land line or mobile, but NOT a pay phone or other multiple-user. 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. * Clinically or virologically confirmed influenza infection within six months preceding the study start. * Planned administration of any vaccine 30 days prior and 30 days after any study vaccine administration. * Chronic administration of immunosuppressants or other immune-modifying drugs within three months prior to enrolment in this study or planned administration during the study period. * Acute disease and/or fever at the time of enrolment * Any confirmed or suspected immunosuppressive or immunodeficient condition based on medical history and physical examination. * Acute or chronic, clinically-significant pulmonary, cardiovascular, hepatic or renal functional abnormality, as determined by medical history and physical examination. * Previous administration of any H1N1 A/California-like vaccine. * Administration of immunoglobulins and/or any blood products within the three months prior to the enrolment in this study, or planned during the study. * If the subject is female and if she is of childbearing potential, she must practice adequate contraception for 30 days prior to vaccination, have a negative pregnancy test and continue such precautions for two months after completion of the vaccination series. * 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. * Known use of an analgesic or antipyretic medication within 12 hours prior to first vaccination. * Child in Care.

Locations (5)

GSK Investigational Site

Bilbao, Spain

GSK Investigational Site

Burgos, Spain

GSK Investigational Site

Madrid, Spain

GSK Investigational Site

Móstoles/Madrid, Spain

GSK Investigational Site

Outcomes

Primary Outcomes

Number of Subjects With Haemagglutination-inhibition (HI) Antibody Concentrations Above the Cut-off Value

The seropositivity cut-off value of the assay was equal to or above (≥) 1:10 in the sera of subjects seronegative before vaccination. The flu strain assessed was A/California/7/2009 (H1N1)v-like (Flu A/CAL/7/09).

Time frame: At Day 0

Number of Subjects With HI Antibody Concentrations Above the Cut-off Value

The seropositivity cut-off value of the assay was ≥ 1:10 in the sera of subjects seronegative before vaccination. The flu strain assesssed was Flu A/CAL/7/09.

Time frame: At Day 42

Titers for Serum HI Antibodies

Antibody titers were presented as geometric mean titers (GMTs). The reference seropositivity cut-off value was ≥ 1:10. The flu strain assessed was Flu A/CAL/7/09.

Time frame: At Day 0

Titers for Serum HI Antibodies

Antibody titers were presented as geometric mean titers (GMTs). The reference seropositivity cut-off value was ≥ 1:10. The flu strain assessed was Flu A/CAL/7/09.

Time frame: At Day 42

Number of Seroconverted (SCR) Subjects in Terms of HI Antibodies

A seroconverted subject was defined as: For initially seronegative subjects \[antibody titer below (\<) 1:10 prior to vaccination\], antibody titer ≥ 1:40 after vaccination; For initially seropositive subjects (antibody titer ≥ 1:10 prior to vaccination), at least a 4-fold increase in post-vaccination titer. The flu strain assessed was Flu A/CAL/7/09.

Time frame: At Day 42

Number of Seroprotected (SPR) Subjects in Terms of HI Antibodies

Seroprotection was defined as the percentage of subjects with a serum HI titer ≥ 1:40, that usually is accepted as indicating protection. The flu strain assessed was Flu A/CAL/7/09.

Data from ClinicalTrials.gov

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Secondary Outcomes

Number of Subjects With HI Antibody Concentrations Above the Cut-off Value

The seropositivity cut-off value of the assay was ≥ 1:10 in the sera of subjects seronegative before vaccination. The flu strain assesssed was Flu A/CAL/7/09.

Time frame: At Days 0, 21, 42 and at Month 12

Titers for Serum HI Antibodies

Antibody titers were presented as geometric mean titers (GMTs). The reference seropositivity cut-off value was ≥ 1:10. The flu strain assessed was Flu A/CAL/7/09.

Time frame: At Days 0, 21, 42 and at Month 12

Number of Seroconverted (SCR) Subjects in Terms of HI Antibodies

Time frame: At Days 21, 42 and at Month 12

Number of Seroprotected Subjects in Terms of HI Antibodies

Seroprotection was defined as the percentage of subjects with a serum HI titer ≥ 1:40, that usually is accepted as indicating protection. The flu strain assessed was Flu A/CAL/7/09.

Time frame: At Days 0, 21, 42 and at Month 12

Seroconversion Factor (SCF) for HI Antibody Titers

Seroconversion factor was defined as the fold increase in serum HI GMTs post-vaccination compared to pre-vaccination. The flu strain assessed was Flu A/CAL/7/09.

Time frame: At Days 21, 42 and at Month 12

Number of Subjects With Neutralizing Antibody Concentrations Above the Cut-off Value

The seropositivity cut-off value of the assay was ≥ 1:8 in the sera of subjects seronegative before vaccination. The flu strain assesssed was Flu A/Neth/602/09.

Time frame: At Days 0, 21 and 42

Titers for Serum Neutralizing Antibodies

Antibody titers were presented as geometric mean titers (GMTs). The reference seropositivity cut-off value was ≥ 1:8. The flu strain assessed was A/Netherlands/602/2009 (H1N1)v-like (Flu A/Neth/602/09).

Time frame: At Days 0, 21 and 42

Number of Subjects With Neutralizing Antibody Concentrations Above the Cut-off Value

The seropositivity cut-off value of the assay was ≥ 1:8 in the sera of subjects seronegative before vaccination. The flu strain assesssed was Flu A/Neth/602/09.

Time frame: At Month 12

Titers for Serum Neutralizing Antibodies

Antibody titers were presented as geometric mean titers (GMTs). The reference seropositivity cut-off value was ≥ 1:8. The flu strain assessed was Flu A/Neth/602/09.

Time frame: At Month 12

Number of Seroconverted (SCR) Subjects in Terms of H1N1 Neutralizing Antibodies

A seroconverted subject was defined as: For initially seronegative subjects, antibody titer ≥ 1:32 after vaccination; For initially seropositive subjects, at least a 4-fold increase in post-vaccination titer. The flu strain assessed was Flu A/Neth/602/09.

Time frame: At Days 21 and 42

Number of Seroconverted (SCR) Subjects in Terms of H1N1 Neutralizing Antibodies

Time frame: At Month 12

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 50 millimeters (mm) of injection site.

Time frame: 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 diarrhea, drowsiness, irritability, loss of appetite, 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. Grade 3 symptom = symptom that prevented normal activity. Grade 3 fever = fever \> 39.0 °C. Related = symptom assessed by the investigator as related to the vaccination.

Time frame: 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 arthralgia, fatigue, gastrointestinal, headache, myalgia, shivering and fever \[defined as axillary temperature equal to or above (≥) 37.5 degrees Celsius (°C)\]. Any = occurrence of the symptom regardless of intensity grade. Grade 3 symptom = symptom that prevented normal activity. Grade 3 fever = fever \> 39.0 °C. Related = symptom assessed by the investigator as related to the vaccination.

Time frame: During the 7-day (Days 0-6) post-vaccination period following each dose and across doses

Number of Subjects With Any Medically-attended Events (MAEs)

MAEs were defined as events for which the subject received medical attention defined as hospitalization, an emergency room visit, or a visit to or from medical personnel (medical doctor) for any reason. Any MAE(s) = Occurrence of any MAE(s) regardless of intensity grade or relation to vaccination.

Time frame: During the entire study period (from Day 0 up to Month 12)

Number of Subjects With Any Adverse Events of Specific Interest (AESIs), Including Potential Immune-mediated Disease (pIMDs)

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.

Time frame: During the entire study period (from Day 0 up to Month 12)

Number of Subjects With Normal or Abnormal Biochemical Levels

Among biochemical parameters assessed were alanine aminotransferase \[ALAT\], aspartate aminotransferase \[ASAT\], bilirubin \[BILI\], creatinine \[CREA\] and blood urea nitrogen \[BUN\]. Levels of biochemical parameters assessed in terms of normal laboratory values were - unknown, below, within and above.

Time frame: At Days 0, 21 and 42

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.

Time frame: During the 21-day (Days 0-20) follow-up period after the first vaccination

Number of Subjects With Any, Grade 3 and Related Unsolicited Adverse Events (AEs)

Time frame: During the 83-day (Days 0-82) follow-up period after the first vaccination and the 62-day (Days 0-61) follow-up period after the second vaccination

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.

Time frame: During the entire study period (from Day 0 up to Month 12)