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Completed

NCT Number: NCT01457027

A Study to Assess Immunogenicity Parameters After Vaccination Against Influenza and to Evaluate How These Parameters Change During the Influenza Season

A study to evaluate the humoral immune response 3 weeks after vaccination with Inflexal V according to the CHMP criteria in elderly subjects for the 2011/2012 WHO recommended vaccine strains, to evaluate immunogenicity parameters 6 months after vaccination for the 3 vaccine strains and to assess the cross-protection against 4 selected circulating heterogeneous A/H1N1 influenza strains 3 weeks after influenza vaccination versus baseline.

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Key information

Conditions

Influenza Infections Influenza, Human Orthomyxoviridae Infections RNA Virus Infections Respiratory Tract Diseases Respiratory Tract Infections Virus Diseases

Age range

60 year and older

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 4

Primary location

Dept. of Health Sciences, University of Genoa and Hygiene Unit, "San Martino" University Hospital

Genoa, 16100, Italy

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Healthy female and male adults aged >60 years on the day of enrollment
  • Written informed consent
  • Females with confirmed menopause (postmenopausal is defined as 12 months with no menses without an alternative medical cause)

Exclusion criteria

  • Acute exacerbation of bronchopulmonary infection (cough, sputum, lung findings) or other acute disease
  • Acute febrile illness (≥38.0 °C)
  • Prior vaccination with an influenza vaccine for season 2011/2012
  • Known hypersensitivity to any vaccine component
  • Previous history of a serious adverse reaction to influenza vaccine
  • History of egg protein allergy or severe atopy
  • Known blood coagulation disorder
  • Chronic (longer than 14 days) administration of immunosuppressants or other immune-modifying drugs within 6 months before the first dose of the study vaccine, including oral corticosteroids in dosages of ≥0.5 mg/kg/day prednisolone or equivalent (inhaled or topical steroids are allowed)
  • Known immunodeficiency (including leukemia, HIV seropositivity) or cancer
  • Investigational medicinal product received in the past 3 months (90 days)
  • Treatment with immunoglobulins or blood transfusion(s) received in the past 3 months (90 days)
  • Participation in another clinical trial
  • Employee at the investigational site or relative of the investigator
  • Anticipated non-compliance with study procedures

Treatment and study plan

Inflexal V

Biological

Inflexal V influenza vaccine, formulated for the WHO requirements ofr the 2011-2012 season, containing per 0.5 mL dose:

  • 15 µg hemagglutinin (HA) antigen of A/California/7/2009 (H1N1)-like virus
  • 15 µg HA antigen of A/Perth/16/2009 (H3N2)-like virus
  • 15 µg HA antigen of B/Brisbane/60/2008-like virus

Dose: intramuscular administration (M. deltoideus) of a single dose of 0.5 mL on Day 1

Primary outcomes

  1. Seroprotection

    Time frame: 3 weeks after vaccination (Day 22 ± 2 days)

    Seroprotection rate, defined as proportion of subjects with HI antibody titer ≥1:40 (The primary endpoints are the immunogenicity parameters for HA assessed via hemagglutinin inhibition method (HI). These parameters will be analyzed according to the EMA "Note for guidance on harmonisation of requirements for influenza vaccines," 1997)

  2. Seroconversion

    Time frame: 3 weeks after vaccination (Day 22 ± 2 days)

    Seroconversion rate, defined as proportion of subjects with ≥4-fold increase in HI antibody titer and with a titer of ≥1:40 (The primary endpoints are the immunogenicity parameters for HA assessed via hemagglutinin inhibition method (HI). These parameters will be analyzed according to the EMA "Note for guidance on harmonisation of requirements for influenza vaccines," 1997)

  3. Geometric Mean Titer

    Time frame: 3 weeks after vaccination (Day 22 ± 2 days)

    GMT of HI antibodies and fold-increase in GMT (The primary endpoints are the immunogenicity parameters for HA assessed via hemagglutinin inhibition method (HI). These parameters will be analyzed according to the EMA "Note for guidance on harmonisation of requirements for influenza vaccines," 1997)

Secondary outcomes

  1. Geometric Mean Titer

    Time frame: 6 months post-vaccination

    GMT of HI antibodies and fold-increase in GMT (The primary endpoints are the immunogenicity parameters for HA assessed via hemagglutinin inhibition method (HI). These parameters will be analyzed according to the EMA "Note for guidance on harmonisation of requirements for influenza vaccines," 1997)

  2. Seroprotection

    Time frame: 6 months post-vaccination

    Seroprotection rate, defined as proportion of subjects with HI antibody titer ≥1:40 (The primary endpoints are the immunogenicity parameters for HA assessed via hemagglutinin inhibition method (HI). These parameters will be analyzed according to the EMA "Note for guidance on harmonisation of requirements for influenza vaccines," 1997)

  3. Seroconversion

    Time frame: 6 months post-vaccination

    Seroconversion rate, defined as proportion of subjects with ≥4-fold increase in HI antibody titer and with a titer of ≥1:40 (The primary endpoints are the immunogenicity parameters for HA assessed via hemagglutinin inhibition method (HI). These parameters will be analyzed according to the EMA "Note for guidance on harmonisation of requirements for influenza vaccines," 1997)

Sponsors and collaborators

Lead sponsor

Crucell Holland BV

Industry

Registry information

Official study title

A Phase IV, Open Label Study to Evaluate the Short and Long Term Immune Response and CROSS-protection After Vaccination With viroSOME Adjuvanted Inflexal V in Elderly Subjects

Important dates

Study start
2011
Primary completion
2012
Study completion
2012
First posted
Oct 21, 2011
Registry last updated
Feb 20, 2013

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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