Immunogenicity & Safety of GSK's Avian Flu Vaccine 1557484A Given to Adults Aged 18-64 Years

GlaxoSmithKline469 enrolled

Overview

The purpose of this observer-blind study is to determine whether GSK's avian flu vaccine GSK 1557484A is immunogenic when given to adults aged 18-64 years.

All enrolled subjects will receive 1 dose of study vaccine. All subjects will attend formal study center visits for safety and immunogenicity assessments on Days 0, 10, 42, 84, and 182 with a telephone safety contact on Day 364. This Protocol Posting has been updated according to Protocol amendment, 8 Dec 08

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

PREVENTION

Masking

DOUBLE

Enrollment

469

Conditions

Influenza

Interventions

GSK A/turkey H5N1 Influenza vaccineBIOLOGICAL

One dose administered intramuscularly (IM) in the deltoid region. Different formulations are tested.

Eligibility

Sex: ALLMin age: 18 YearsMax age: 64 YearsHealthy volunteers:

Medical Language ↔ Plain English

Inclusion Criteria: * Male and female adults 18 to 64 years of age at time of first vaccination, inclusive. * Written informed consent obtained from the subject. * Stable health status as defined by absence of a health event satisfying the definition of a SAE, or a change in an ongoing drug therapy due to therapeutic failure or symptoms of drug toxicity, within 1 month prior to enrollment. * 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 other multiple-user device. * Comprehension of the study requirements, expressed availability for the required study period, and ability to attend scheduled visits. * Subjects who the investigator believes can and will comply with the requirements of the protocol. Exclusion Criteria: * Presence of evidence of substance abuse or of neurological or psychiatric diagnoses which, even if clinically stable, are deemed by the investigator to render the potential subject unable/unlikely to provide accurate safety reports. * Diagnosed with cancer, or treatment for cancer, within 3 years. * Presence of an oral temperature \>= 37.8ºC, or acute symptoms greater than "mild" severity on the scheduled date of vaccination. * Any confirmed or suspected immunosuppressive or immunodeficiency condition including history of human immunodeficiency virus (HIV) infection. * Receipt of systemic glucocorticoids (prednisone \>= 10 mg/day for more than 14 consecutive days) within 1 month prior to study enrollment, or any other cytotoxic or immunosuppressive drug within 6 months of study enrollment. * An acute evolving neurological disorder or history of Guillain-Barré syndrome within 6 weeks of receipt of seasonal influenza vaccine. * Any significant disorder of coagulation or treatment with Coumadin derivatives or heparin. * Administration of any vaccines within 30 days before the first study vaccine dose. * Previous administration of any H5N1 vaccine. * Use of any investigational or non-registered product (drug or vaccine) or planned participation in another investigational study within 30 days prior to study enrollment, or during the 12 months following test article administration. Use of any investigational or non-registered product with immunosuppressive properties is exclusionary at any time during the trial. * Receipt of any immunoglobulins and/or any blood products within 3 months of study enrollment or planned administration of any of these products during the study period. * Any known or suspected allergy to any constituent of influenza vaccines; a history of anaphylactic-type reaction to consumption of eggs; or a history of severe adverse reaction to a previous influenza vaccine. * Known pregnancy or a positive urine beta-human chorionic gonadotropin (β-hCG) test result prior to vaccination. * Lactating or nursing. * Women of child bearing potential (who lack a history of reliable contraceptive practices. The provision of this history does NOT replace the requirement to perform, and obtain negative results in pregnancy urine tests prior to vaccination. * Known receipt of analgesic or antipyretic medication with the specific intent of prophylaxis of vaccine reactogenicity on the day of vaccination. Subjects on stable chronic regimens of potentially analgesic or anti-pyretic medications for pre-existing diagnoses are not required to discontinue them.

Locations (10)

GSK Investigational Site

Huntsville, Alabama, United States

GSK Investigational Site

Anaheim, California, United States

GSK Investigational Site

Miami, Florida, United States

Outcomes

Primary Outcomes

Number of Seroconverted Subjects for Haemagglutination Inhibition (HI) Antibodies Against the A/Turkey/Turkey/1/2005 (A/Turkey) Virus Strain.

A seroconverted subject was defined as a vaccinated subject who had either a pre-vaccination (Day 0) titer less than (\<) 1:10 for HI and a post-vaccination reciprocal titer greater than or equal to (≥) 1:40, or a pre-vaccination reciprocal titer ≥ 1:10 for HI and at least a 4-fold increase in post-vaccination reciprocal titer.

Time frame: At Day 10

Number of Subjects Seroprotected for Haemagglutination Inhibition (HI) Antibodies Against the A/Turkey/Turkey/1/2005 (A/Turkey) Virus Strain

A seroprotected subject against the A/turkey virus strain was defined as a subject with serum HI antibody reciprocal titer ≥ 1:40 post-vaccination, a level of HI antibodies that may correlate with benefit in protection against influenza.

Time frame: At Day 10

Haemagglutination Inhibition (HI) Antibody Titers Against the A/Turkey/Turkey/1/2005 (A/Turkey) Virus Strain.

HI antibody titers were expressed as geometric mean titers (GMTs). The cut-off of the assay was the seropositivity cut-off of ≥ 1:10.

Time frame: At Day 10

Secondary Outcomes

Number of Seroconverted Subjects for Haemagglutination Inhibition (HI) Antibodies Against the A/Turkey/Turkey/1/2005 (A/Turkey) Virus Strains.

Time frame: At Day 0 to Day 42 and at Day 0 to Day 182

Haemagglutination Inhibition (HI) Antibody Titers Against the A/Turkey/Turkey/1/2005 Virus Strain.

Data from ClinicalTrials.gov

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GSK Investigational Site

Stockbridge, Georgia, United States

GSK Investigational Site

Lenexa, Kansas, United States

GSK Investigational Site

Missoula, Montana, United States

GSK Investigational Site

Las Vegas, Nevada, United States

GSK Investigational Site

Halifax, Nova Scotia, Canada

GSK Investigational Site

Truro, Nova Scotia, Canada

GSK Investigational Site

Sherbrooke, Quebec, Canada

Titers were expressed as geometric mean titers (GMTs). The cut-off of the assay was the seropositivity cut-off of ≥ 1:10

Time frame: At Day 0, Day 10, Day 42 and Day 182

HI Antibody Geometric Mean Fold Rise (GMFR) Against the A/Turkey/Turkey/1/2005 (A/Turkey) Virus Strain.

GMFR were defined as the geometric mean of the within-subject ratios of the post-vaccination reciprocal HI titer to the Day 0 reciprocal HI titer.

Time frame: At Day 0 to Day 10, Day 42 and Day 182

HI Antibody Titers Against the A/Indonesia/5/2005 (A/Indo) Virus Strain.

Titers were expressed as geometric mean titers (GMTs). The cut-off of the assay was the seropositivity cut-off of ≥ 1:10

Time frame: At Day 0, Day 10, Day 42 and Day 182

Number of Subjects Seroprotected for Haemagglutination Inhibition (HI) Antibodies Against the A/Indonesia/5/2005 (A/Indo) and A/Turkey/Turkey/1/2005 (A/Turkey) Virus Strains.

A seroprotected subject was defined as a subject with serum HI antibody reciprocal titer ≥ 1:40 post-vaccination, a level of HI antibodies that may correlate with benefit in protection against influenza.

Time frame: At Day 0, Day 10, Day 42 and Day 182 for A/Indo and at Day 0, Day 42 and Day 182 for A/turkey virus strains.

Number of Seroconverted Subjects for Haemagglutination Inhibition (HI) Antibodies Against the A/Indonesia/5/2005 (A/Indo) Virus Strains.

A seroconverted subject was defined as a vaccinated subject who had either a pre-vaccination titer less than (\<) 1:10 and a post-vaccination reciprocal titer greater than or equal to (≥) 1:40 or a pre-vaccination reciprocal titer ≥ 1:10 and at least a 4-fold increase in post-vaccination titer.

Time frame: At Day 0 to Day 10, Day 42 and Day 182

HI Antibody Geometric Mean Fold Rise (GMFR) Against the A/Indonesia/5/2005 (A/Indo) Virus Strains.

GMFR were defined as the geometric mean of the within-subject ratios of the post-vaccination reciprocal HI titer to the Day 0 reciprocal HI titer.

Time frame: At Day 10, Day 42 and Day 182

Microneutralization (MN) Antibody Titers Against the A/Turkey/Turkey/1/2005 (A/Turkey), A/Indonesia/5/2005 (A/Indo) and A/Vietnam/1194/2004 (A/Vie) Virus Strains.

MN antibody titers were expressed as geometric mean titers (GMTs). The cut-off of the assay was the seropositivity cut-off of ≥ 1:28.

Time frame: At Day 0, Day 10, Day 42 and Day 182

Number of Subjects Seropositive for MN Antibodies Against the A/Turkey/Turkey/1/2005 (A/Turkey), A/Indonesia/5/2005 (A/Indo) and A/Vietnam/1194/2004 (A/Vie) Virus Strains.

A seropositive subject was defined as a vaccinated subject who had a MN antibody titer ≥ the cut-off value of 1:28.

Time frame: At Day 0, Day 10, Day 42 and Day 182

Vaccine Response Rate (VRR) for Microneutralization (MN) Antibodies Against the A/Turkey/Turkey/1/2005 (A/Turkey), A/Indonesia/5/2005 (A/Indo) and A/Vietnam/1194/2004 (A/Vie) Virus Strains.

VRR was defined as a 4-fold rise from a detectable baseline titer or a rise from undetectable (\< 1:28, recorded 1:14 if \< 1:28) to ≥ 1:56 in the subjects.

Time frame: At Day 10

Vaccine Response Rate (VRR) for Microneutralization (MN) Antibodies Against the A/Turkey/Turkey/1/2005 (A/Turkey), A/Indonesia/5/2005 (A/Indo) and A/Vietnam/1194/2004 (A/Vie) Virus Strains

VRR was defined as a 4-fold rise from a detectable baseline titer or a rise from undetectable (\< 1:28, recorded 1:14 if \< 1:28) to ≥ 1:56 in the subjects.

Time frame: At Day 42

Vaccine Response Rate (VRR) for Microneutralization (MN) Antibodies Against the A/Turkey/Turkey/1/2005 (A/Turkey), A/Indonesia/5/2005 (A/Indo) and A/Vietnam/1194/2004 (A/Vie) Virus Strains.

VRR was defined as a 4-fold rise from a detectable baseline titer or a rise from undetectable (\< 1:28, recorded 1:14 if \< 1:28) to ≥ 1:56 in the subjects.

Time frame: At Day 182

Number of Subjects Reporting Any and Grade 3 Solicited Local Symptoms.

Assessed solicited local symptoms were pain, redness and swelling. Any = occurrence of any solicited local symptoms regardless of their intensity grade.

Time frame: Within the 7-day (Days 0-6) post vaccination period.

Number of Subjects Reporting Any and Grade 3 Solicited General Symptoms.

Solicited general symptoms assessed were fatigue, headache, joint pain at other location (joint pain), muscle aches, shivering, sweating and fever. Any =occurrence of any solicited general symptoms reported irrespective of intensity grade and relationship to vaccination. Any fever = oral temperature ≥ 38.0 degrees Celsius (°C).

Time frame: Within the 7-day (Days 0-6) post vaccination period.

Number of Subjects With Medically-attended Adverse Events (MAEs).

MAEs were defined as adverse events with medically-attended visits that were not routine visits for physical examination or vaccination such as visits for hospitalization, an emergency room visit, or an otherwise unscheduled visit to or from medical personnel (medical doctor) for any reason. Any was defined as any occurrence of MAE(s).

Time frame: From Day 0 to Day 378

Number of Subjects Reporting Any Unsolicited Adverse Events (AEs).

An unsolicited AE was defined as an untoward medical occurrence in a patient or clinical investigation subject, temporally associated with 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 occurrence of any unsolicited symptom regardless of intensity grade or relation to vaccination.

Time frame: From Day 0 to Day 42

Number of Subjects Reporting Serious Adverse Events (SAEs).

A SAE was defined as any untoward medical occurrence that: resulted in death, was life threatening, required hospitalization or prolongation of hospitalization, resulted in disability/incapacity or was a congenital anomaly/birth defect in the offspring of a study subject. Any was defined as occurrence of any symptom regardless of intensity grade or relation to vaccination.

Time frame: From Day 0 to Day 378