Lysophosphatidic Acid Inhibits CD8 T-cell Activation and Control of Tumor Progression
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- Shannon K. Oda
- Authors' Affiliations: 1Integrated Department of Immunology, University of Colorado at Denver; 2Integrated Department of Immunology, National Jewish Health, Denver, Colorado; 3Department of Physiology, University of Tennessee Health Science Center, Memphis, Tennessee; and 4Lexicon Pharmaceuticals, Woodlands, Texas
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- Pamela Strauch
- Authors' Affiliations: 1Integrated Department of Immunology, University of Colorado at Denver; 2Integrated Department of Immunology, National Jewish Health, Denver, Colorado; 3Department of Physiology, University of Tennessee Health Science Center, Memphis, Tennessee; and 4Lexicon Pharmaceuticals, Woodlands, Texas
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- Yuko Fujiwara
- Authors' Affiliations: 1Integrated Department of Immunology, University of Colorado at Denver; 2Integrated Department of Immunology, National Jewish Health, Denver, Colorado; 3Department of Physiology, University of Tennessee Health Science Center, Memphis, Tennessee; and 4Lexicon Pharmaceuticals, Woodlands, Texas
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- Amin Al-Shami
- Authors' Affiliations: 1Integrated Department of Immunology, University of Colorado at Denver; 2Integrated Department of Immunology, National Jewish Health, Denver, Colorado; 3Department of Physiology, University of Tennessee Health Science Center, Memphis, Tennessee; and 4Lexicon Pharmaceuticals, Woodlands, Texas
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- Tamas Oravecz
- Authors' Affiliations: 1Integrated Department of Immunology, University of Colorado at Denver; 2Integrated Department of Immunology, National Jewish Health, Denver, Colorado; 3Department of Physiology, University of Tennessee Health Science Center, Memphis, Tennessee; and 4Lexicon Pharmaceuticals, Woodlands, Texas
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- Gabor Tigyi
- Authors' Affiliations: 1Integrated Department of Immunology, University of Colorado at Denver; 2Integrated Department of Immunology, National Jewish Health, Denver, Colorado; 3Department of Physiology, University of Tennessee Health Science Center, Memphis, Tennessee; and 4Lexicon Pharmaceuticals, Woodlands, Texas
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- Roberta Pelanda
- Authors' Affiliations: 1Integrated Department of Immunology, University of Colorado at Denver; 2Integrated Department of Immunology, National Jewish Health, Denver, Colorado; 3Department of Physiology, University of Tennessee Health Science Center, Memphis, Tennessee; and 4Lexicon Pharmaceuticals, Woodlands, Texas
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- Raul M. Torres
- Authors' Affiliations: 1Integrated Department of Immunology, University of Colorado at Denver; 2Integrated Department of Immunology, National Jewish Health, Denver, Colorado; 3Department of Physiology, University of Tennessee Health Science Center, Memphis, Tennessee; and 4Lexicon Pharmaceuticals, Woodlands, Texas
抄録
<jats:title>Abstract</jats:title><jats:p>CD8 T lymphocytes are able to eliminate nascent tumor cells through a process referred to as immunosurveillance. However, multiple inhibitory mechanisms within the tumor microenvironment have been described that impede tumor rejection by CD8 T cells, including increased signaling by inhibitory receptors. Lysophosphatidic acid (LPA) is a bioactive lysophospholipid that has been shown repeatedly to promote diverse cellular processes benefiting tumorigenesis. Accordingly, the exaggerated expression of LPA and LPA receptors is a common feature of diverse tumor cell lineages and can result in elevated systemic LPA levels. LPA is recognized by at least six distinct G protein–coupled receptors, several of which are expressed by T cells, although the precise function of LPA signaling in CD8 T-cell activation and function has not been defined. Here, we show that LPA signaling via the LPA5 receptor expressed by CD8 T cells suppresses antigen receptor signaling, cell activation, and proliferation in vitro and in vivo. Importantly, in a mouse melanoma model tumor-specific CD8 T cells that are LPA5-deficient are able to control tumor growth significantly better than wild-type tumor-specific CD8 T cells. Together, these data suggest that the production of LPA by tumors serves not only in an autocrine manner to promote tumorigenesis, but also as a mechanism to suppress adaptive immunity and highlights a potential novel target for cancer treatment. Cancer Immunol Res; 1(4); 245–55. ©2013 AACR.</jats:p>
収録刊行物
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- Cancer Immunology Research
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Cancer Immunology Research 1 (4), 245-255, 2013-10-01
American Association for Cancer Research (AACR)