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The Immunologic Basis for an Attenuated Immune Response to the Influenza Vaccine After Repeated Annual Vaccination (FLU1)

11 de diciembre de 2018 actualizado por: Mark Mulligan, Emory University
This is a prospective pilot study designed to suggest differences in the immunologic response to the seasonal influenza vaccine in people with regular vaccination history compared to those vaccinated less regularly. Participants will receive one dose of the Food and Drug Administration (FDA) approved 2016-2017 seasonal influenza vaccine. Immune system data will be collected at standard time points. The duration of the study for each participant will be approximately 1 month.

Descripción general del estudio

Estado

Terminado

Condiciones

Intervención / Tratamiento

Descripción detallada

This is a prospective pilot study in 20 males and non-pregnant females, 20 to 30 years old, inclusive, who are in good health and meet all eligibility criteria. The study is designed to evaluate differences in the immunologic response to the seasonal influenza vaccine in people with regular vaccination history compared to those vaccinated less regularly.

Participants will be sorted to either Arm A (Naïve) or Arm B (Experienced) based on their vaccination history. Those vaccinated no more than 2 out of the past 5 years will be in Arm A. Those vaccinated 3 or more out of the past 5 years will be in Arm B. Participants will receive one dose of the Food and Drug Administration (FDA) approved 2016-2017 seasonal influenza vaccine. The duration of the study for each participant will be approximately 1 month. Subjects will return for clinic visits on Days 3, 8, 15, and 29 during the month follow-up period following vaccination.

The study has two primary objectives; to evaluate the antibody response to the influenza vaccine in people who are vaccinated regularly and those vaccinated less regularly; the second is to evaluate circulating follicular helper T cells (TFH) in people who are vaccinated regularly and those vaccinated less regularly.

Tipo de estudio

Intervencionista

Inscripción (Actual)

20

Fase

  • Fase 4

Contactos y Ubicaciones

Esta sección proporciona los datos de contacto de quienes realizan el estudio e información sobre dónde se lleva a cabo este estudio.

Ubicaciones de estudio

    • Georgia
      • Atlanta, Georgia, Estados Unidos, 30322
        • The Hope Clinic of the Emory Vaccine Center

Criterios de participación

Los investigadores buscan personas que se ajusten a una determinada descripción, denominada criterio de elegibilidad. Algunos ejemplos de estos criterios son el estado de salud general de una persona o tratamientos previos.

Criterio de elegibilidad

Edades elegibles para estudiar

20 años a 30 años (Adulto)

Acepta Voluntarios Saludables

Sí

Géneros elegibles para el estudio

Todos

Descripción

Inclusion Criteria:

  • Capable of informed consent and provision of written informed consent before any study procedures.
  • Capable of attending all study visits according to the study schedule.
  • Are in good health, as determined by medical history and targeted physical exam related to this history.
  • Oral temperature is less than 38 degrees Celsius.
  • Resting pulse rate is between 50 and 115 beats per minute.
  • Female subjects of childbearing age must have a negative urine pregnancy test within 24 hours before study vaccination.
  • Have received the influenza vaccine at least 3 of the past 5 years or have received the influenza vaccine in 2 or less of the past 5 years.

Exclusion Criteria:

  • Have an acute illness within 72 hours before vaccination.
  • Have any condition that, in the opinion of the principal investigator, would place the subject at an unacceptable risk of injury or confound the interpretation of the study results.
  • Have any acute or chronic medical condition that, in the opinion of the principal investigator, would make vaccination unsafe or interfere with the evaluation of immune response to study vaccination.
  • Have a suppressed immune system as a result of illness, immunosuppressive medication, chemotherapy, or radiation therapy within 3 years prior to study vaccination.
  • Have known HIV, hepatitis B, or hepatitis C infection.
  • Have a known history of autoimmune disease.
  • Have taken oral or parenteral corticosteroids of any dose within 30 days before study vaccination.
  • Have taken high-dose inhaled corticosteroids within 30 days before study vaccination.
  • Have received any licensed live vaccine within 30 days or any licensed inactivated vaccine within 14 days prior to study vaccination.
  • Have planned vaccination with any vaccine during the 29-day duration of subject study participation.
  • Have received immunoglobulin or other blood products, with the exception of Rho D immunoglobulin, within 90 days prior to study vaccination.
  • Have donated blood or blood products within 30 days before study vaccination, plan to donate blood at any time during the 29-day duration of subject study participation, or plan to donate blood within 30 days after the last blood draw.
  • Have known hypersensitivity or allergy to eggs, egg protein, chicken protein, or other compounds of the study vaccine.
  • Have a history of severe reactions following vaccination with influenza virus vaccines

Plan de estudios

Esta sección proporciona detalles del plan de estudio, incluido cómo está diseñado el estudio y qué mide el estudio.

¿Cómo está diseñado el estudio?

Detalles de diseño

  • Propósito principal: Prevención
  • Asignación: No aleatorizado
  • Modelo Intervencionista: Asignación paralela
  • Enmascaramiento: Ninguno (etiqueta abierta)

Armas e Intervenciones

Grupo de participantes/brazo
Intervención / Tratamiento
Experimental: Vaccination Naïve
Participants who have received an influenza vaccine in 2 or less of the past 5 years will receive the FDA-approved 2016-2017 influenza vaccine.
Quadrivalent influenza A/Hemagglutinin Type 1 (H1N1), A/Influenza A virus subtype (A/H3N2) H3N2,and B virus vaccine for Intramuscular (IM) use is a sterile, clear and slightly opalescent suspension administered as a single 0.5 mL intramuscular dose.
Experimental: Vaccination Experienced
Participants who have received an influenza vaccine at least 3 of the past 5 years will receive the FDA-approved 2016-2017 influenza vaccine.
Quadrivalent influenza A/Hemagglutinin Type 1 (H1N1), A/Influenza A virus subtype (A/H3N2) H3N2,and B virus vaccine for Intramuscular (IM) use is a sterile, clear and slightly opalescent suspension administered as a single 0.5 mL intramuscular dose.

¿Qué mide el estudio?

Medidas de resultado primarias

Medida de resultado
Medida Descripción
Periodo de tiempo
Change in Geometric Mean Serum Hemagglutination Inhibition (HAI) Antibody Titer
Periodo de tiempo: Baseline (Day 1), Day 29
Geometric mean serum HAI antibody titers serum HAI titer will be collected via blood draw. Titer for serum HAI antibodies will be calculated using the geometric mean. Change is defined as the difference in means from Day 1 to Day 29.
Baseline (Day 1), Day 29
Change in Mean Level of Circulating Follicular Helper T (TFH) Cells
Periodo de tiempo: Up to 15 Days
TFH cells will be collected via blood draw. Change is defined as the difference in the mean levels of cells from baseline, day 8, and day 15.
Up to 15 Days

Medidas de resultado secundarias

Medida de resultado
Medida Descripción
Periodo de tiempo
Change in Mean Levels of Plasmablasts
Periodo de tiempo: Up to 29 Days
Plasmablasts will be collected via blood draw. Change is defined as the difference in mean levels from baseline to Day 29.
Up to 29 Days
Change in Mean Levels of Memory B Cells From Baseline (Day 1) to Day 29
Periodo de tiempo: Baseline (Day 1) and Day 29
Memory B cells will be collected via blood draw. Change is defined as the difference in mean levels from baseline to Day 29.
Baseline (Day 1) and Day 29
Change in Mean Levels of Antigen-specific IL-2 Producing CD4+ T Cells
Periodo de tiempo: Up to 29 Days
Antigen-specific Interleukin 2 (IL-2) producing cluster of differentiation 4 (CD4)+ T cells will be collected via blood draw. Change is defined as the difference in mean levels from baseline to Day 29.
Up to 29 Days
Change in Mean Levels of Antigen-specific Cluster of Differentiation 8 (CD8) + T Cells
Periodo de tiempo: Up to 29 Days
CD8+T cells will be collected via blood draw. Change is defined as the difference in mean levels from baseline to Day 29.
Up to 29 Days

Colaboradores e Investigadores

Aquí es donde encontrará personas y organizaciones involucradas en este estudio.

Patrocinador

Investigadores

  • Investigador principal: Mark Mulligan, MD, Emory University

Fechas de registro del estudio

Estas fechas rastrean el progreso del registro del estudio y los envíos de resultados resumidos a ClinicalTrials.gov. Los registros del estudio y los resultados informados son revisados ​​por la Biblioteca Nacional de Medicina (NLM) para asegurarse de que cumplan con los estándares de control de calidad específicos antes de publicarlos en el sitio web público.

Fechas importantes del estudio

Inicio del estudio (Actual)

1 de julio de 2016

Finalización primaria (Actual)

18 de octubre de 2016

Finalización del estudio (Actual)

1 de diciembre de 2016

Fechas de registro del estudio

Enviado por primera vez

4 de agosto de 2016

Primero enviado que cumplió con los criterios de control de calidad

18 de agosto de 2016

Publicado por primera vez (Estimar)

23 de agosto de 2016

Actualizaciones de registros de estudio

Última actualización publicada (Actual)

12 de diciembre de 2018

Última actualización enviada que cumplió con los criterios de control de calidad

11 de diciembre de 2018

Última verificación

1 de diciembre de 2018

Más información

Términos relacionados con este estudio

Palabras clave

Otros números de identificación del estudio

  • IRB00090196

Esta información se obtuvo directamente del sitio web clinicaltrials.gov sin cambios. Si tiene alguna solicitud para cambiar, eliminar o actualizar los detalles de su estudio, comuníquese con register@clinicaltrials.gov. Tan pronto como se implemente un cambio en clinicaltrials.gov, también se actualizará automáticamente en nuestro sitio web. .