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Generation of Human Alloantigen-specific T Cells from Peripheral Blood
Published on: November 21, 2014
Antigen recognition and T-cell biology
Michael I Nishimura1, Jeffrey J Roszkowski, Tamson V Moore
1Department of Surgery, University of Chicago Medical Center, Chicago, IL 60637, USA.
Abstract:
Despite the wealth of information that has been acquired regarding the way T cells recognize their targets, we are left with far more questions than answers regarding how to manipulate the immune response to better treat cancer patients. Clearly, most patients have a broad repertoire of T cells capable of recognizing their tumor cells. Despite the presence of these tumor reactive T cells and our ability to increase their frequency though vaccination or adoptive transfer, patients still progress. From the T cell side, defects in T cell signaling may account for much of our failure to achieve significant numbers of objective clinical responses. In spite of these negatives, the horizon does remain bright for T cell based immune therapy of cancer. The periodic objective clinical response tells us that immune therapy can work. Now that we know that cancer patients have the capacity to mount immune responses against their tumors, current and future investigations with agents which alter T cell function combined with vaccination or adoptive T cell transfer may help tip the balance towards effective immune therapies.
Insights
Cancer patients possess tumor-reactive T cells, but immune therapy often fails due to T cell signaling defects. Enhancing T cell function alongside immunotherapy may improve cancer treatment outcomes.
Area of Science:
- Immunology
- Oncology
- Cancer Research
Background:
- T cells are crucial for recognizing cancer cells.
- Many cancer patients have T cells that can target their tumors.
- Current cancer immunotherapies face challenges in achieving widespread clinical responses.
Purpose of the Study:
- To explore the reasons behind the limited success of T cell-based cancer immunotherapies.
- To identify potential strategies for improving the efficacy of cancer immune treatments.
- To highlight the promise of T cell-mediated cancer therapy.
Main Methods:
- Review of existing knowledge on T cell recognition of tumor targets.
- Analysis of T cell repertoire and function in cancer patients.
- Examination of clinical responses to current immunotherapies.
Main Results:
- Most cancer patients have T cells capable of recognizing tumor cells.
- Despite the presence of tumor-reactive T cells, patients often progress.
- Defects in T cell signaling are a potential cause for treatment failure.
- Periodic objective clinical responses indicate that immunotherapy can be effective.
Conclusions:
- Cancer patients have the inherent capacity to mount immune responses against their tumors.
- Modulating T cell function is critical for successful cancer immunotherapy.
- Combining agents that alter T cell function with vaccination or adoptive T cell transfer shows promise for effective cancer treatment.
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