Description Module
The Description Module contains narrative descriptions of the clinical trial, including a brief summary and detailed description. These descriptions provide important information about the study's purpose, methodology, and key details in language accessible to both researchers and the general public.
Description Module path is as follows:
Study -> Protocol Section -> Description Module
Description Module
Ignite Creation Date:
2025-12-24 @ 2:07 PM
Ignite Modification Date:
2025-12-24 @ 2:07 PM
NCT ID:
NCT00573495
Brief Summary:
This is a study on how to activate the immune system with a vaccine. The vaccine is made up of two proteins found in breast cancer: telomerase and survivin. The vaccine is given in combination with other drugs that may also have an effect on the immune system and attack the cancer.
The goals of the study are:
1. to test the safety of the combination of agents
2. to find out what effects the treatment has on advanced breast cancer
Detailed Description:
Patients with advanced breast cancer may often fail standard of care treatments for metastatic disease. This research is studying a combinations of agents that impact the immune system.
About \>85% of all human cancers, including breast cancer, express telomerase (hTERT) activity. Targeting hTERT immunologically may also minimize immune escape due to antigen loss because mutation or deletion of hTERT may be incompatible with sustained tumor growth. hTERT Multi-Peptide Vaccine is made up of 1540 hTERT peptide and cryptic peptides selected for "low-affinity" binding to HLA-A2 in order to increase the likelihood that the host immune system would ignore them, and then they have been modified by changing the first amino acid of the peptides to tyrosine in order to increase HLA - A2 affinity. The two "heteroclitic" peptides are R572Y (YLFFYRKSV) and D988Y (YLQVNSLQTV), which bind HLA-A2 with high avidity and elicit specific CTL (cytotoxic T lymphocyte) responses using healthy donor mononuclear cells in vitro. In addition, in mouse models, these peptide vaccines elicit lytic CTL responses which are protective against tumor challenges using a TERT-expressing murine tumor.
Subjects will also be immunized with a peptide vaccine derived from survivin, an important anti-apoptotic protein which is overexpressed in a broad range of malignancies including breast cancer. Survivin may be an ideal and "universal" tumor antigen since it is overexpressed in a wide variety of cancers yet terminally differentiated adult cells do not express the protein.
CMV derived CTL epitopes will be used as positive control peptides.
Daclizumab is a humanized anti-human CD25 monoclonal antibody that binds specifically to CD25 expressing cells, including Treg cells, and inhibits its proliferation.
Prevnar is designed to augment T-helper cell immunity.
Study:
NCT00573495
Study Brief:
Protocol Section:
NCT00573495