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A Safety and Immunogenicity Study of IVACFLU-A/H5N1

sunnuntai 12. toukokuuta 2019 päivittänyt: Institute of Vaccines and Medical Biologicals, Vietnam

A Phase 2/3 Double Blinded, Randomized, Placebo-controlled Study in Healthy Adult Volunteers in Vietnam to Examine the Safety and Immunogenicity of an Inactivated A/H5N1 Influenza Vaccine (IVACFLU-A/H5N1) Produced by IVAC

The study hypothesis was that two 0.5 mL doses of whole virion monovalent A/H5N1 influenza vaccine (IVACFLU-A/H5N1) adjuvanted with alum would be safe and well tolerated in healthy adults, and that at least one of the two doses tested would be immunogenic in 60% or more of the subjects tested.

Tutkimuksen yleiskatsaus

Tila

Valmis

Ehdot

Interventio / Hoito

Yksityiskohtainen kuvaus

Although the A/H1N1 (2009) pandemic has subsided and the virus has become endemic, the threat of another pandemic due to avian influenza A/H5N1 remains constant. Since 1997, highly pathogenic A/H5N1 avian viruses have caused both widespread outbreaks in poultry with high mortality and sporadic, severe, and fatal disease in humans. Southeast Asian countries, including Vietnam, have been affected by influenza A/H5N1. From 2003 through March 2015, WHO has reported 826 confirmed human cases of A/H5N1 influenza infection; including 440 fatal cases (World Health Organization, 2015). Southeast Asian countries accounted for 42% of all confirmed influenza A/H5N1 cases reported since 2003, and influenza A/H5N1 infection in animals is now thought to be endemic in the region (World Health Organization, 2015). As of March 2015, Vietnam has reported 127 confirmed human cases and 64 deaths. In 2014, two cases of A/H5N1 avian influenza were reported in Vietnam. Therefore, the risk of transmission to human is still present.

At the time of the study, no influenza A/H5N1 vaccine had been licensed in Vietnam. IVACFLU-A/H5N1 is an influenza A/H5N1 vaccine produced by Institute of Vaccines and Medical Biologicals (IVAC) using embryonated chicken eggs. IVACFLU-A/H5N1 is a whole virus vaccine, collected in a linear sucrose density gradient solution using a continuous flow centrifuge (Alfa Wassermann, West Caldwell, NJ) and inactivated with formaldehyde. The vaccine is alum adjuvanted. Vaccine strain NIBRG-14 derived from original influenza A/Vietnam/1194/2004 was provided to IVAC by the National Institute for Biological Standards and Control of the Health Protection Agency of the United Kingdom. A clinical trial of IVACFLU-A/H5N1 vaccine conducted in 75 subjects at the Ben Luc Health District in Vietnam in 2014 showed that the vaccine is safe and immunogenic at doses of 7.5 and 15 mcg.

This study was conducted in two stages: Phase 2 was a dose selection study where subjects were randomized to one of the three groups (15 mcg IVACFLU-A/H5N1 vaccine, 30 mcg IVACFLU-A/H5N1 vaccine or placebo) at a 1:1:1 ratio. The conduct of Phase 3 was dependent on showing hemagglutination inhibition (HAI) response titer of ≥1:40 in ≥60% of vaccine recipients in at least one of the two Phase 2 IVACFLU-A/H5N1 vaccine groups. Based on the review of immunogenicity and safety results from the Phase 2 study, a dose of study vaccine was selected for Phase 3. Subjects were randomized at two sites (Khanh Hoa and Hai Phong) to receive the IVACFLU-A/H5N1 vaccine dose selected in Phase 2 or placebo . Safety was assessed in all subjects and immunogenicity was measured in a subset of subjects at the Hai Phong study site.

Opintotyyppi

Interventio

Ilmoittautuminen (Todellinen)

930

Vaihe

  • Vaihe 2
  • Vaihe 3

Yhteystiedot ja paikat

Tässä osiossa on tutkimuksen suorittajien yhteystiedot ja tiedot siitä, missä tämä tutkimus suoritetaan.

Opiskelupaikat

  • Vietnam
    • Hai Phong
      • Haiphong, Hai Phong, Vietnam
        • Phase 3: Hai Phong Provincial Preventive Medicine Center
    • Khanh Hoa
      • Nha Trang, Khanh Hoa, Vietnam
        • Phase 2 & 3: Khanh Hoa Provincial Health Department

Osallistumiskriteerit

Tutkijat etsivät ihmisiä, jotka sopivat tiettyyn kuvaukseen, jota kutsutaan kelpoisuuskriteereiksi. Joitakin esimerkkejä näistä kriteereistä ovat henkilön yleinen terveydentila tai aiemmat hoidot.

Kelpoisuusvaatimukset

Opintokelpoiset iät

18 vuotta - 60 vuotta (Aikuinen)

Hyväksyy terveitä vapaaehtoisia

Ei

Sukupuolet, jotka voivat opiskella

Kaikki

Kuvaus

Inclusion Criteria:

  • Male or female adult 18 through 60 years of age at the enrollment visit.
  • Literate (by self-report) and willing to provide written informed consent.
  • Healthy adults, as established by the medical history and screening evaluations, including physical examination, capable and willing to complete Diary Cards, and willing to return for all follow-up visits.
  • For females able to become pregnant, willing to utilize reliable birth control measures (intrauterine device, hormonal contraception, condoms) through the Day 43 visit.

Exclusion Criteria:

  • Participation in another clinical trial involving any vaccine or therapy within the previous three months, or planned enrollment in such a trial during the period of this study.
  • Received any non-study vaccine within 4 weeks prior to enrollment or refused to postpone receipt of such vaccines until after the Day 43 visit.
  • Current or recent (within 2 weeks of enrollment) acute illness with or without fever.
  • Received immune globulin or other blood products within 3 months prior to study enrollment or planned receipt of such products prior to the Day 43 visit.
  • Chronic administration (defined as more than 14 consecutively-prescribed days) of immunosuppressants or other immune-modulating therapy within six months prior to study enrollment. (For corticosteroids, this meant prednisone or equivalent, 0.5 mg per kg per day; topical or intranasal steroids were allowed.)
  • History of asthma.
  • Hypersensitivity after previous administration of any vaccine.
  • Suspected or known hypersensitivity to any of the study vaccine components, including chicken or egg protein, antibiotics, and rubber (from the vaccine vial stoppers).
  • Acute or chronic clinically significant pulmonary, cardiovascular, hepatobiliary, metabolic, neurologic, psychiatric, or renal functional abnormality, as determined by medical history, physical examination, or clinical laboratory screening tests (Phase 2 only), which in the opinion of the investigator, might have interfered with the study objectives.
  • History of any blood or solid organ cancer.
  • History of thrombocytopenic purpura or known bleeding disorder.
  • History of seizures.
  • Known or suspected immunosuppressed or immune deficient condition of any kind.
  • Known Hepatitis B Virus (HBV) or Hepatitis C virus (HCV) infection by self-report (Phase 3) or a positive test for either HBV surface antigen (HBsAg) or HCV antibody using anti-HCV test (Phase 2).
  • Known HIV infection (self-report)
  • Known active tuberculosis or symptoms of active tuberculosis (self-report).
  • History of chronic alcohol abuse and/or illegal drug use.
  • Pregnancy or lactation (a negative pregnancy test was required before administration of study product for all women of childbearing potential).
  • History of Guillain-Barre Syndrome.
  • Any condition in the opinion of the investigator that would have increased the health risk of the subject if he/she participated in the study or interfered with the evaluation of the study objectives.

Note: Minor out-of-range laboratory values no greater than Grade 1 were not considered to be exclusionary at screening.

Opintosuunnitelma

Tässä osiossa on tietoja tutkimussuunnitelmasta, mukaan lukien kuinka tutkimus on suunniteltu ja mitä tutkimuksella mitataan.

Miten tutkimus on suunniteltu?

Suunnittelun yksityiskohdat

  • Ensisijainen käyttötarkoitus: Ennaltaehkäisy
  • Jako: Satunnaistettu
  • Inventiomalli: Rinnakkaistehtävä
  • Naamiointi: Kolminkertaistaa

Aseet ja interventiot

Osallistujaryhmä / Arm
Interventio / Hoito
Placebo Comparator: Phase 2: Placebo
Subjects participating in Phase 2 and assigned to receiving two injections of placebo administered intramuscularly as a single dose, separated by 21 days.
Biologinen: Placebo
Includes 4.500mg sodium chloride, 0.685 mg sodium phosphate dibasic dihydrate, and 0.186 mg sodium phosphate monobasic dihydrate.
Muut nimet:
  • Sterile Phosphate Buffered Saline (PBS)
Active Comparator: Phase 2: Vaccine (15 mcg)
Subjects participating in Phase 2 and assigned to receiving two injections of IVACFLU-A/H5N1 vaccine (15 mcg concentration) administered intramuscularly as a single dose, separated by 21 days.
Biologinen: IVACFLU-A/H5N1 vaccine
Monovalent A/H5N1 influenza vaccine (MIV), whole virion inactivated, purified by sucrose gradient on ultracentrifuge. The vaccine was produced in eggs, inactivated with formaldehyde, and formulated with aluminum hydroxide 0.6 mg/0.5 mL with no preservative.
Active Comparator: Phase 2: Vaccine (30 mcg)
Subjects participating in Phase 2 and assigned to receiving two injections of IVACFLU-A/H5N1 vaccine (30 mcg concentration) administered intramuscularly as a single dose, separated by 21 days.
Biologinen: IVACFLU-A/H5N1 vaccine
Monovalent A/H5N1 influenza vaccine (MIV), whole virion inactivated, purified by sucrose gradient on ultracentrifuge. The vaccine was produced in eggs, inactivated with formaldehyde, and formulated with aluminum hydroxide 0.6 mg/0.5 mL with no preservative.
Placebo Comparator: Phase 3: Placebo
Subjects participating in Phase 3 and assigned to receiving two injections of placebo administered intramuscularly as a single dose, separated by 21 days.
Biologinen: Placebo
Includes 4.500mg sodium chloride, 0.685 mg sodium phosphate dibasic dihydrate, and 0.186 mg sodium phosphate monobasic dihydrate.
Muut nimet:
  • Sterile Phosphate Buffered Saline (PBS)
Kokeellinen: Phase 3: Vaccine
Subjects participating in Phase 2 and assigned to receiving two injections of IVACFLU-A/H5N1 vaccine (15 mcg concentration) administered intramuscularly as a single dose, separated by 21 days.
Biologinen: IVACFLU-A/H5N1 vaccine
Monovalent A/H5N1 influenza vaccine (MIV), whole virion inactivated, purified by sucrose gradient on ultracentrifuge. The vaccine was produced in eggs, inactivated with formaldehyde, and formulated with aluminum hydroxide 0.6 mg/0.5 mL with no preservative.

Mitä tutkimuksessa mitataan?

Ensisijaiset tulostoimenpiteet

Tulosmittaus
Toimenpiteen kuvaus
Aikaikkuna
Number and Percentage of Subjects Achieving a Hemagglutination Inhibition (HAI) Titer of ≥1:40
Aikaikkuna: Day 1, Day 43
Serum specimens were tested for the presence of HAI antibodies to influenza. The HAI assay was conducted using serum samples from all the subjects in Phase 2 of the study and in a subset of approximately 270 subjects receiving the IVACFLU-A/H5N1 vaccine (vaccinees) and placebo from one study site in Phase 3 in order to have at least 200 evaluable subjects receiving IVACFLU-A/H5N1 and 40 evaluable subjects receiving placebo, at the end of study.
Day 1, Day 43

Toissijaiset tulostoimenpiteet

Tulosmittaus
Toimenpiteen kuvaus
Aikaikkuna
Phase 2: Number and Percentage of Subjects Achieving a Hemagglutination Inhibition (HAI) Titer of ≥1:40
Aikaikkuna: Day 1, Day 22
Serum specimens were tested for the presence of HAI antibodies to influenza. The HAI assay was conducted using serum samples from all the subjects in Phase 2 of the study and in a subset of approximately 270 subjects receiving the IVACFLU-A/H5N1 vaccine (vaccinees) and placebo from one study site in Phase 3 in order to have at least 200 evaluable subjects receiving IVACFLU-A/H5N1 and 40 evaluable subjects receiving placebo, at the end of study.
Day 1, Day 22
Phase 2: Number and Percentage of Subjects Achieving at Least a 4-fold Increase in Hemagglutination Inhibition (HAI) Titer
Aikaikkuna: Day 22, Day 43
Serum specimens were tested for the presence of HAI antibodies to influenza on day 1, day 22, and day 43 (day 1 and 22 prior to injection). The HAI assay was conducted using serum samples from all the subjects in Phase 2 of the study and in a subset of approximately 270 subjects receiving the IVACFLU-A/H5N1 vaccine (vaccinees) and placebo from one study site in Phase 3 in order to have at least 200 evaluable subjects receiving IVACFLU-A/H5N1 and 40 evaluable subjects receiving placebo, at the end of study.
Day 22, Day 43
Phase 3: Number and Percentage of Subjects Achieving at Least a 4-fold Increase in Hemagglutination Inhibition (HAI) Titer
Aikaikkuna: Day 43
Serum specimens were tested for the presence of HAI antibodies to influenza. The HAI assay was conducted using serum samples from all the subjects in Phase 2 of the study and in a subset of approximately 270 subjects receiving the IVACFLU-A/H5N1 vaccine (vaccinees) and placebo from one study site in Phase 3 in order to have at least 200 evaluable subjects receiving IVACFLU-A/H5N1 and 40 evaluable subjects receiving placebo, at the end of study.
Day 43
Phase 2: Geometric Mean Hemagglutination Inhibition (HAI) Titer
Aikaikkuna: Day 1, Day 22, Day 43
Serum specimens were tested for the presence of HAI antibodies to influenza on day 1, day 22, and day 43 (day 1 and 22 prior to injection). The HAI assay was conducted using serum samples from all the subjects in Phase 2 of the study and in a subset of approximately 270 subjects receiving the IVACFLU-A/H5N1 vaccine (vaccinees) and placebo from one study site in Phase 3 in order to have at least 200 evaluable subjects receiving IVACFLU-A/H5N1 and 40 evaluable subjects receiving placebo, at the end of study.
Day 1, Day 22, Day 43
Phase 3: Geometric Mean Hemagglutination Inhibition (HAI) Titer
Aikaikkuna: Day 1, Day 43
Serum specimens were tested for the presence of HAI antibodies to influenza. The HAI assay was conducted using serum samples from all the subjects in Phase 2 of the study and in a subset of approximately 270 subjects receiving the IVACFLU-A/H5N1 vaccine (vaccinees) and placebo from one study site in Phase 3 in order to have at least 200 evaluable subjects receiving IVACFLU-A/H5N1 and 40 evaluable subjects receiving placebo, at the end of study.
Day 1, Day 43
Phase 2: Geometric Mean Hemagglutination Inhibition (HAI) Titer Ratio, With Respect to Day 1
Aikaikkuna: Day 22, Day 43
Serum specimens were tested for the presence of HAI antibodies to influenza on day 1, day 22, and day 43 (day 1 and 22 prior to injection). The HAI assay was conducted using serum samples from all the subjects in Phase 2 of the study and in a subset of approximately 270 subjects receiving the IVACFLU-A/H5N1 vaccine (vaccinees) and placebo from one study site in Phase 3 in order to have at least 200 evaluable subjects receiving IVACFLU-A/H5N1 and 40 evaluable subjects receiving placebo, at the end of study.
Day 22, Day 43
Phase 3: Geometric Mean Hemagglutination Inhibition (HAI) Titer Ratio, With Respect to Day 1
Aikaikkuna: Day 43
Serum specimens were tested for the presence of HAI antibodies to influenza. The HAI assay was conducted using serum samples from all the subjects in Phase 2 of the study and in a subset of approximately 270 subjects receiving the IVACFLU-A/H5N1 vaccine (vaccinees) and placebo from one study site in Phase 3 in order to have at least 200 evaluable subjects receiving IVACFLU-A/H5N1 and 40 evaluable subjects receiving placebo, at the end of study.
Day 43
Number and Percentage of Subjects Experiencing Reactogenicity
Aikaikkuna: 30 minutes after each injection

Immediate reactogenicity (30 minutes post-injection) were evaluated on Day 1 and Day 22 and consisted of:

  • Inspection of the upper arms for the presence or absence of redness, swelling, hardness, pain, or tenderness; and
  • Documentation of the presence or absence of headache, fever, fatigue/malaise, muscle aches, joint aches, nausea, vomiting, or chills.

Immediate reactogenicity were assessed by a study physician or appropriately trained medical staff.
30 minutes after each injection
Number and Percentage of Subjects Experiencing Reactogenicity
Aikaikkuna: 7 days after each vaccination

Reported solicited signs and symptoms were recorded by the subject on the Diary Card from Days 1-7 and Days 22-28 in the study, then evaluated by study physician on Days 8, 22, and 29.The evaluated solicited local reactogenicity events were as follows:

  • Size of redness (at site of injection) in centimeters (cm)
  • Size of swelling (at site of injection) in cm
  • Size of induration (hardness at site of injection) in cm
  • Pain (at site of injection)
  • Tenderness (at site of injection)

The evaluated solicited systemic reactogenicity events were as follows:

  • Fever/body temperature (and body location of measurement)
  • Fatigue/malaise
  • Generalized muscle aches
  • Joint aches/pains
  • Chills
  • Nausea
  • Vomiting
  • Headache
7 days after each vaccination
Number and Percentage of Subjects Experiencing Unsolicited Adverse Events (AE)
Aikaikkuna: 21 days after each vaccination

Unsolicited AEs were any AEs that occurred any time after study product was given (temporally related to study product), whether or not deemed "related" to the product, and were not solicited. Unsolicited AEs were either observed by study staff while the subject was at a clinic for a study visit or reported by the subject at any time. Any solicited sign or symptom starting after 7 days post-study product injection was recorded as an "unsolicited AE".

For the Phase 2 study, laboratory results were considered AEs when the result was Grade 2 or above.

Any medical condition that was present at the time that the subject was enrolled was not reported as an AE, but was reported as a pre-existing condition on the Medical History Form. However, if this condition occurred with greater frequency or severity during the study, it was recorded as an AE.
21 days after each vaccination
Number and Percentage of Subjects Experiencing Unsolicited Serious Adverse Events (SAE)
Aikaikkuna: 90 days
Defined as an adverse event that led to death, was life-threatening (subject at immediate risk of death); required inpatient hospitalization or prolongation of existing hospitalization; resulted in congenital anomaly/birth defect; resulted in a persistent or significant disability or incapacity.
90 days
Phase 2: Number and Percentage of Subjects Achieving at Least a 4-fold Increase in Neutralizing Antibody Titer
Aikaikkuna: Day 22, Day 43
The microneutralization (MN) assay is an alternative assay for determining immunologic response to vaccination. It is a highly sensitive assay that can provide information on the ability of induced antibody to neutralize influenza virus. Titers of neutralizing antibodies were expressed as the amount of the greatest dilution of serum giving a neutralization of 50% of tissue cytopathic effects of the virus in the tissue culture.
Day 22, Day 43
Phase 3: Number and Percentage of Subjects Achieving at Least a 4-fold Increase in Neutralizing Antibody Titer
Aikaikkuna: Day 43

The MN assay is an alternative assay for determining immunologic response to vaccination. It is a highly sensitive assay that can provide information on the ability of induced antibody to neutralize influenza virus. Titers of neutralizing antibodies were expressed as the amount of the greatest dilution of serum giving a neutralization of 50% of tissue cytopathic effects of the virus in the tissue culture.

In Phase 3, MN assay was conducted in a subset of approximately 270 subjects receiving the IVACFLU-A/H5N1 vaccine (vaccinees) and placebo from one study site in order to have at least 200 evaluable subjects receiving IVACFLU A/H5N1 and 40 evaluable subjects receiving placebo.
Day 43
Phase 2: Geometric Mean Neutralizing Antibody Titer
Aikaikkuna: Day 1, Day 22, Day 43
The microneutralization (MN) assay is an alternative assay for determining immunologic response to vaccination. It is a highly sensitive assay that can provide information on the ability of induced antibody to neutralize influenza virus. Titers of neutralizing antibodies were expressed as the amount of the greatest dilution of serum giving a neutralization of 50% of tissue cytopathic effects of the virus in the tissue culture.
Day 1, Day 22, Day 43
Phase 3: Geometric Mean Neutralizing Antibody Titer
Aikaikkuna: Day 1, Day 43
Serum specimens were tested for the presence of HAI antibodies to influenza. The HAI assay was conducted using serum samples from all the subjects in Phase 2 of the study and in a subset of approximately 270 subjects receiving the IVACFLU-A/H5N1 vaccine (vaccinees) and placebo from one study site in Phase 3 in order to have at least 200 evaluable subjects receiving IVACFLU-A/H5N1 and 40 evaluable subjects receiving placebo, at the end of study.
Day 1, Day 43
Phase 2: Geometric Mean Neutralizing Antibody Titer Ratio, With Respect to Day 1
Aikaikkuna: Day 22, Day 43
The microneutralization (MN) assay is an alternative assay for determining immunologic response to vaccination. It is a highly sensitive assay that can provide information on the ability of induced antibody to neutralize influenza virus. Titers of neutralizing antibodies were expressed as the amount of the greatest dilution of serum giving a neutralization of 50% of tissue cytopathic effects of the virus in the tissue culture.
Day 22, Day 43
Phase 3: Geometric Mean Neutralizing Antibody Titer Ratio, With Respect to Day 1
Aikaikkuna: Day 43

The MN assay is an alternative assay for determining immunologic response to vaccination. It is a highly sensitive assay that can provide information on the ability of induced antibody to neutralize influenza virus. Titers of neutralizing antibodies were expressed as the amount of the greatest dilution of serum giving a neutralization of 50% of tissue cytopathic effects of the virus in the tissue culture.

In Phase 3, MN assay was conducted in a subset of approximately 270 subjects receiving the IVACFLU-A/H5N1 vaccine (vaccinees) and placebo from one study site in order to have at least 200 evaluable subjects receiving IVACFLU A/H5N1 and 40 evaluable subjects receiving placebo.
Day 43

Yhteistyökumppanit ja tutkijat

Täältä löydät tähän tutkimukseen osallistuvat ihmiset ja organisaatiot.

Sponsori

Institute of Vaccines and Medical Biologicals, Vietnam

Yhteistyökumppanit

Department of Health and Human Services
National Institute of Hygiene and Epidemiology, Vietnam
FHI 360
PATH
World Health Organization

Tutkijat

  • Päätutkija: Tran N Duong, MD, PhD, National Institute of Hygiene and Epidemiology, Vietnam

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Tiistai 29. elokuuta 2017

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Keskiviikko 30. elokuuta 2017

Opintoihin ilmoittautumispäivät

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Perjantai 20. marraskuuta 2015

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Tiistai 24. marraskuuta 2015

Tutkimustietojen päivitykset

Viimeisin päivitys julkaistu (Todellinen)

Tiistai 21. toukokuuta 2019

Viimeisin lähetetty päivitys, joka täytti QC-kriteerit

Sunnuntai 12. toukokuuta 2019

Viimeksi vahvistettu

Keskiviikko 1. toukokuuta 2019

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Tähän tutkimukseen liittyvät termit

Avainsanat

Muita asiaankuuluvia MeSH-ehtoja

Muut tutkimustunnusnumerot

  • IVACFLU-A/H5N1-0203

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