Vaccine Therapy in Preventing Cytomegalovirus in Healthy Participants

Nonneoplastic Condition Clinical Trial

Official title: A Phase I Dose Escalation Study of Peptide Vaccines With Activity Against Human Cytomegalovirus

Status Completed

Clinical Trial Summary

RATIONALE: Vaccines made from peptides may help the body build an immune response to kill cytomegalovirus.

PURPOSE: This phase I trial is studying the side effects and best dose of vaccine therapy in preventing cytomegalovirus in healthy participants.

Clinical Trial Description

OBJECTIVES:

Primary

• To establish whether 3 vaccine dose levels of PADRE-CMV and tetanus-CMV fusion peptide vaccines are safe and well tolerated in healthy cytomegalovirus (CMV)-seropositive or -seronegative participants.

• To establish safe dose levels for the PADRE-CMV and tetanus-CMV fusion peptide vaccines in combination with PF 03512676 DNA in these participants.

Secondary

• To provide preliminary evidence of enhanced cellular immunity to CMV at levels of T cells that would support potential feasibility if such cells were to be transferred from the donor to recipients of hematopoietic stem cell transplantation (HSCT) in amounts consistent with protection against disease.

• To determine whether a reduced dose of peptide vaccine can be immunogenic in combination with PF 03512676 DNA.

• To confer CMV-specific cytotoxic T-lymphocyte (CTL) function to CMV-negative participants.

• To determine the duration of immune enhancement of CMV-specific CTL function up to 12 months following immunization of healthy participants.

OUTLINE: This is a dose-escalation study of PADRE-CMV and tetanus-CMV fusion peptide vaccines. Participants are stratified according to cytomegalovirus (CMV) serum status (positive vs negative). Participants are assigned to 1 of 2 groups.

• Group A: Participants receive either PADRE-CMV fusion peptide vaccine or tetanus-CMV fusion peptide vaccine subcutaneously (SC) on days 1, 21, 42, and 63 in the absence of unacceptable toxicity.

• Group B: Participants receive either PADRE-CMV fusion peptide vaccine in CpG 7909 adjuvant SC or tetanus-CMV fusion peptide vaccine in CpG 7909 adjuvant SC on days 1, 21, 42, and 63 in the absence of unacceptable toxicity.

Participants are contacted by telephone every 3-7 days after immunization. Participants also complete a notebook on any health-related event for 14 days after each immunization.

Participants undergo blood sample collection at baseline and periodically during study for immunologic laboratory studies, including flow cytometry, by HLA-A2-CMV-tetramer, CMV-specific intracellular cytokine, CMV-specific CD107 degranulation, lymphoproliferation, and chromium release assays.

After completion of study therapy, participants are followed for up to 1 year. ;

Study Design

Allocation: Non-Randomized, Intervention Model: Parallel Assignment, Masking: Open Label, Primary Purpose: Treatment

Related Conditions & MeSH terms

• Nonneoplastic Condition

• NCT number: NCT00722839
• Study type: Interventional
• Source: City of Hope Medical Center
• Status: Completed
• Phase: Phase 1
• Start date: December 2006
• Completion date: April 2012