Evaluation of Immunogenicity, Safety and Reactogenicity of GSK Biologicals' Boostrix Vaccine Administered as a Booster Dose in Healthy Russian Subjects

Diphtheria-Tetanus-acellular Pertussis Vaccines Clinical Trial

Official title: Evaluation of Immunogenicity, Safety and Reactogenicity of GSK Biologicals' dTpa Booster Vaccine (263855) (Boostrix) Administered as a Booster Dose in Healthy Russian Subjects

Status Completed

Clinical Trial Summary

Diphtheria, tetanus and pertussis are common causes of diseases worldwide, with significant morbidity and mortality. The purpose of this study is to assess the immunogenicity, safety and reactogenicity of a single dose of GlaxoSmithKline (GSK) Biologicals' Boostrix vaccine, administered as a booster dose in healthy Russian subjects. An equal number of subjects are expected to be recruited in the following age categories: 4-9 years (children), 10-17 years (adolescents), 18-64 years (adults) and ≥65 years (elderly population). By receiving the Boostrix vaccine, the subjects could be protected against diphtheria, tetanus and pertussis diseases.

Clinical Trial Description

The study is a phase III, open-label, self-contained, multi-centre, uncontrolled, single-country study with a single group. Treatment will be allocated in a non-randomised process and stratified by age as 4-9 years (children), 10-17 years (adolescents), 18-64 years (adults) and ≥65 years (elderly population). The study will consist of a single primary epoch (001) starting at Visit 1 (Day 1) with the administration of a single dose of Boostrix vaccine and ending at Visit 2 (Day 31). Blood samples will be collected at Visits 1 and 2.

Protocol Amendment 1 was developed to implement the following changes:

• Wording "parents/Legally Acceptable Representative(s) (LAR[s])" was replaced by the wording "parent(s)/adoptive parent(s)". As per Russian legislation, only parents or adoptive parents can give consent for the enrolment of their child in a clinical trial. No other person is allowed to give consent on behalf of a minor to participate in a clinical trial.

• The age groups at inclusion to study were amended according to the approved Boostrix EU label and physiological particularities i.e., from 3-9 to 4-9 years (children), 10-19 to 10-17 years (adolescents), 20-64 to 18-64 years (adults) and ≥65 years (elderly population).

• The inclusion criteria have been amended in order to clarify the following,

• Children from four to seven years of age who have received diphtheria, tetanus and pertussis vaccination prior to study enrolment as per local recommendations will be enrolled

• Subjects eight years of age and older who have received diphtheria, tetanus and pertussis vaccination to the best of their/subjects' parent(s)/subjects' adoptive parent(s) knowledge and did not receive an additional diphtheria, tetanus or pertussis vaccination within five years prior to enrolment in the study will be enrolled.

Protocol amendment 2 was developed after the comments from the Russian regulatory authorities [Ministry of Health (MoH)]. Adjustments to the text were made to clarify the inclusion and exclusion criteria for enrolment of subjects and the conduct of the study. In addition, adjustments for the reporting period and assessment of adverse events in the safety sections were made for consistency. The newly re-developed and re-validated GSK's DTPa ELISA cut-offs were updated as per the most recent CBER recommendation (2017).

Protocol amendment 3 is developed to accommodate older adults (approximately 58 years old and older) who were born before national recommendations in Russia for infant DTP vaccination. Adjustments to the text are made in the inclusion criteria to clarify the enrolment of subjects for age group eight years and above. ;

Related Conditions & MeSH terms

• Diphtheria
• Diphtheria-Tetanus-acellular Pertussis Vaccines
• Tetanus
• Whooping Cough

• NCT number: NCT03311659
• Study type: Interventional
• Source: GlaxoSmithKline
• Status: Completed
• Phase: Phase 3
• Start date: January 26, 2018
• Completion date: August 31, 2018