Abstract
The abscopal effect is a phenomenon in which local radiotherapy is associated with the regression of metastatic cancer at a distance from the irradiated site. The abscopal effect may be mediated by activation of the immune system. Ipilimumab is a monoclonal antibody that inhibits an immunologic checkpoint on T cells, cytotoxic T-lymphocyte-associated antigen 4 (CTLA-4). We report a case of the abscopal effect in a patient with melanoma treated with ipilimumab and radiotherapy. Temporal associations were noted: tumor shrinkage with antibody responses to the cancer-testis antigen NY-ESO-1, changes in peripheral-blood immune cells, and increases in antibody responses to other antigens after radiotherapy. (Funded by the National Institutes of Health and others.).
MeSH Terms
Adult
Antibodies/blood
Antibodies, Monoclonal/therapeutic use
Combined Modality Therapy
Female
Humans
Ipilimumab
Lung Neoplasms/drug therapy,immunology,radiotherapy,secondary
Melanoma/drug therapy,immunology,radiotherapy,secondary
Neoplasm Metastasis/immunology
Skin Neoplasms/pathology
Chemicals
Antibodies
Antibodies, Monoclonal
Ipilimumab
Authors & Affiliations
21 authors, click to expand affiliations / ORCID
Postow Michael A
Department of Medicine, Memorial Sloan-Kettering Cancer Center, New York, NY 10065, USA.
Callahan Margaret K
Barker Christopher A
Yamada Yoshiya
Yuan Jianda
Kitano Shigehisa
Mu Zhenyu
Rasalan Teresa
Adamow Matthew
Ritter Erika
Sedrak Christine
Jungbluth Achim A
Chua Ramon
Yang Arvin S
Roman Ruth-Ann
Rosner Samuel
Benson Brenna
Allison James P
Lesokhin Alexander M
Gnjatic Sacha
Wolchok Jedd D
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