Title |
B7-H4 Expression by Nonhematopoietic Cells in the Tumor Microenvironment Promotes Antitumor Immunity
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Published in |
Cancer Immunology Research, February 2015
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DOI | 10.1158/2326-6066.cir-14-0113 |
Pubmed ID | |
Authors |
Ramtin Rahbar, Albert Lin, Magar Ghazarian, Helen-Loo Yau, Sangeetha Paramathas, Philipp A. Lang, Anita Schildknecht, Alisha R. Elford, Carlos Garcia-Batres, Bernard Martin, Hal K. Berman, Wey L. Leong, David R. McCready, Michael Reedijk, Susan J. Done, Naomi Miller, Bruce Youngson, Woong-Kyung Suh, Tak W. Mak, Pamela S. Ohashi |
Abstract |
The B7 family plays a critical role in both positive and negative regulation of immune responses by engaging a variety of receptors on lymphocytes. Importantly, blocking co-inhibitory molecules using antibodies specific for CTLA-4 and PD-1 enhances tumor immunity in a subset of patients. Therefore, it is critical to understand the role of different B7 family members since they may be suitable therapeutic targets. B7-H4 is another member that inhibits T-cell function, and it is also up-regulated on a variety of tumors and has been proposed to promote tumor growth. Here we investigate the role of B7-H4 in tumor development and show that B7-H4 expression inhibits tumor growth in two mouse models. Furthermore, we show that B7-H4 expression is required for antitumor immune responses in a mouse model of mammary tumorigenesis. We found the expression levels of B7-H4 correlate with MHC class I expression in both mouse and human samples. We show that IFNγ up-regulates B7-H4 expression on mouse embryo fibroblasts and that the up-regulation of B7-H4 on tumors is dependent on T cells. Notably, breast cancer patients with increased B7-H4 expression show a prolonged time to recurrence. These studies demonstrate a positive role for B7-H4 in promoting antitumor immunity. |
Mendeley readers
Geographical breakdown
Country | Count | As % |
---|---|---|
France | 1 | 1% |
Unknown | 73 | 99% |
Demographic breakdown
Readers by professional status | Count | As % |
---|---|---|
Researcher | 20 | 27% |
Student > Master | 9 | 12% |
Student > Ph. D. Student | 8 | 11% |
Professor > Associate Professor | 7 | 9% |
Student > Bachelor | 6 | 8% |
Other | 15 | 20% |
Unknown | 9 | 12% |
Readers by discipline | Count | As % |
---|---|---|
Medicine and Dentistry | 22 | 30% |
Immunology and Microbiology | 19 | 26% |
Biochemistry, Genetics and Molecular Biology | 8 | 11% |
Agricultural and Biological Sciences | 8 | 11% |
Pharmacology, Toxicology and Pharmaceutical Science | 1 | 1% |
Other | 3 | 4% |
Unknown | 13 | 18% |