Metastatic Breast Cancer Clinical Trial
Official title:
Phase 1 Study: Induction of Systemic Immune Responses in Metastatic Breast Cancer Patients by Vaccination With a CD80-modified, Devitalized HLA-*A0201+ Breast Cancer Cell Line (KS24.22)
In the last few years there has been a great attempt to develop active immunotherapies for breast cancer patients (BCPs) using undefined as well as selected antigens to activate tumor specific T-lymphocytes. The purpose of this phase-I study was to determine the safety and feasibility of vaccinations with an allogeneic breast cancer cell line, KS24.22, genetically modified to express CD80 and Her-2/neu, and to evaluate the efficacy of inducing tumor antigen-specific immune responses in human leukocyte antigen(HLA)-A*02-matched patients with metastatic breast cancer.
The trial was designed as an open label phase-I. Informed consent was given twice by the
patients (1st for HLA-typing, 2nd for participation in the vaccination trial).
The first four vaccinations, which were given every two weeks, were followed by four monthly
vaccinations. Additional vaccinations were permitted on request for patients who exhibited
stable disease (SD).
Immediately before administration, KS24.22 cells were thawed and lethally irradiated.
KS24.22 cells were adjusted to 10E7/ml in Ringer-Lactate-solution, transferred to 1 ml
syringes and stored on ice until injected within a time frame of 2h. Vaccinations were given
i.d. in the thigh with a total volume of 1 ml divided between two injection sites.
;
Allocation: Non-Randomized, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Single Group Assignment, Masking: Open Label, Primary Purpose: Treatment
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