A recombinant vaccinia virus encoding human papillomavirus types 16 and 18, E6 and E7 proteins as immunotherapy for cervical cancer
LK Borysiewicz, A Fiander, M Nimako, S Man… - The Lancet, 1996 - thelancet.com
LK Borysiewicz, A Fiander, M Nimako, S Man, GWG Wilkinson, D Westmoreland, AS Evans…
The Lancet, 1996•thelancet.comBackground Human papillomavirus (HPV) infection, especially with type 16 or 18, is
associated with cervical cancer. Two HPV proteins, E6 and E7, are consistently expressed in
tumour cells. The objectives of the study were to examine the clinical and environmental
safety and immunogenicity in the first clinical trial of a live recombinant vaccinia virus
expressing the E6 and E7 proteins of HPV 16 and 18 (TA-HPV). Methods The study was an
open label phase I/II trial in eight patients with late stage cervical cancer. The patients were …
associated with cervical cancer. Two HPV proteins, E6 and E7, are consistently expressed in
tumour cells. The objectives of the study were to examine the clinical and environmental
safety and immunogenicity in the first clinical trial of a live recombinant vaccinia virus
expressing the E6 and E7 proteins of HPV 16 and 18 (TA-HPV). Methods The study was an
open label phase I/II trial in eight patients with late stage cervical cancer. The patients were …
Abstract
Background Human papillomavirus (HPV) infection, especially with type 16 or 18, is associated with cervical cancer. Two HPV proteins, E6 and E7, are consistently expressed in tumour cells. The objectives of the study were to examine the clinical and environmental safety and immunogenicity in the first clinical trial of a live recombinant vaccinia virus expressing the E6 and E7 proteins of HPV 16 and 18 (TA-HPV).
Methods The study was an open label phase I/II trial in eight patients with late stage cervical cancer. The patients were vaccinated with a single dose of TA-HPV and kept in strict isolation to monitor local and systemic side-effects, environmental spread, and anti-E6/E7 immune responses.
Findings Vaccination resulted in no significant clinical side-effects and there was no environmental contamination by live TA-HPV. Each patient mounted an antivaccinia antibody response and three of the eight patients developed an HPV-specific antibody response that could be ascribed to the vaccination. HPV-specific cytotoxic T lymphocytes, the effector mechanism most likely to be of therapeutic benefit, were detected in one of three evaluable patients.
Interpretation Further studies to investigate the use of TA-HPV for immunotherapy of cervical cancer are warranted.
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