Split T Cell Tolerance against a Self/Tumor Antigen: Spontaneous CD4+ but Not CD8+ T Cell Responses against p53 in Cancer Patients and Healthy Donors
Author Information
Author(s): Tsuji Takemasa, Matsuzaki Junko, Ritter Erika, Miliotto Anthony, Ritter Gerd, Odunsi Kunle, Old Lloyd J., Gnjatic Sacha
Primary Institution: Ludwig Institute for Cancer Research Ltd., New York Branch at Memorial Sloan-Kettering Cancer Center
Hypothesis
Whether spontaneous immune responses are induced for the tumor antigen p53 in ovarian cancer patients and healthy individuals.
Conclusion
The study found that while CD4+ T cell responses against p53 were present in both cancer patients and healthy donors, CD8+ T cell responses were not detectable.
Supporting Evidence
- 21% of ovarian cancer patients showed specific IgG responses against wild-type p53 protein.
- Significant p53-specific IFN-γ producing CD4+ T cells were detected in 6 patients.
- Similar levels of p53-specific CD4+ T cells were also detected in healthy donors.
Takeaway
In this study, researchers looked at how the immune system responds to a protein called p53 in cancer patients and healthy people. They found that some immune cells called CD4+ T cells reacted to p53, but another type called CD8+ T cells did not.
Methodology
The study involved measuring serum antibody levels and T cell responses against p53 in ovarian cancer patients and healthy donors using ELISA and ELISPOT assays.
Limitations
The study did not detect CD8+ T cell responses against p53, which may limit the understanding of the immune response to this antigen.
Participant Demographics
298 ovarian cancer patients and 153 healthy individuals were included in the study.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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