Immune Response followingTdap Vaccine in Pregnancy

May 6, 2025 updated by: Hillel Yaffe Medical Center

Immune Response Following Tdap Vaccination in Pregnant vs. Non Pregnant Women

Pregnancy involves changes in immune response. The investigators aim to evaluate the immune response to Tdap in pregnancy in comparison to non pregnant women usig proteomics and gene sequencing.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Detailed Description

Many vaccine-preventable diseases, like influenza, pertussis, and tetanus cause substantial morbidity and mortality in pregnant women, newborns and infants. Immunization during pregnancy has the potential to provide protection to the newborn and infant by the transplacental transfer of vaccine-specific maternal antibodies. However, the immunobiology underlying immunization during pregnancy, that leads to the protection of the newborn are not understood. Current vaccine formulations were designed for and tested in non-pregnant populations; yet substantial immune modulations take place during different stages of pregnancy and potentially can impact the humoral response following maternal immunization. The investigators thus have insufficient data on quantity and quality of the immune response during pregnancy and how this relates to immunity provided from the mother to the newborn. First, The investigators hypothesize that the nature and breadth of the humoral immune response following vaccination differs in pregnant and non-pregnant vaccinees. Next, The investigators hypothesize that the vaccine-specific antibodies that cross the placenta, comprise distinct repertoire features thus, the placenta functions as a differential barrier for antibody transfer. To test these hypotheses, The investigators will use proteomic and genomic/transcriptomic measurements of antibody repertoires in the maternal and cord blood compartments. The measurements will be based on antibody clonal diversity/frequency, V(D)J germline usage and SHM, where we expect to find changes in i) vaccine-specific B cell frequency, antibody clonal diversity, germline usage and SHM in pregnant women and ii) distinct repertoire features in the transplacental vaccine-specific antibody compartment compared the maternal compartment. The investigators will utilize deep sequencing and proteomic technologies to provide, for the first time, insight into the immunobiology of a promising intervention aimed to prevent early life infectious morbidity and mortality and establish new research avenues for vaccine research in vulnerable populations.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Observational

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
21

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Contact Backup

Study Locations

  • Israel
      • Hadera, Israel, 3810101
        • Hillel Yaffe Medical Center

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

18 years to 45 years (Adult)

Accepts Healthy Volunteers

Yes

Sampling Method

Non-Probability Sample

Study Population

pregnant and non pregnant women

Description

Inclusion Criteria for pregnant women (cohort 1):

  • age between 18-45 years
  • pregnant women who expected to have Tdap vaccine
  • Informed Consent Form signature

Inclusion Criteria for non pregnant women (cohort 2):

  • age between 18-45 years
  • non pregnant women who expected to have Tdap vaccine
  • Informed Consent Form signature

Exclusion Criteria (cohort 1 and 2):

  • any background immune diseases- autoimmune conditions or cancer.
  • women who take immunosuppressive/ immunomodulatory medications
  • a patient has received Tdap vaccine in 6 months prior to study entry.
  • no will to signed the Informed Consent Form.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Observational Models: Cohort
  • Time Perspectives: Prospective

Cohorts and Interventions

Group / Cohort

Group / Cohort

A group or subgroup of participants in an observational study that is assessed for biomedical or health outcomes.
Pregnant women
pregnant women expected to be vaccinate with Tdap vaccine during their 3th trimester
Non pregnant women
Non pregnant women expected to be vaccinate with Tdap vaccine

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Immune response following Tdap vaccine
Time Frame: 4 months
Characterization of immune response following Tdap vaccine.
4 months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Hillel Yaffe Medical Center

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Principal Investigator: Rinat Gabbay-Benziv, Dr, Hillel Yaffe Medical Center

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
September 12, 2019

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
October 19, 2023

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
October 19, 2023

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
September 5, 2019

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
September 6, 2019

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
September 9, 2019

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
May 9, 2025

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
May 6, 2025

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
May 1, 2025

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • 0079-19-HYMC

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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