Abstract:
:Cancer-associated thrombocytosis and high concentrations of circulating transforming growth factor-β1 (TGF-β1) are frequently observed in patients with progressive cancers. Using genetic and pharmacological approaches, we show a direct link between thrombin catalytic activity and release of mature TGF-β1 from platelets. We found that thrombin cleaves glycoprotein A repetitions predominant (GARP), a cell surface docking receptor for latent TGF-β1 (LTGF-β1) on platelets, resulting in liberation of active TGF-β1 from the GARP-LTGF-β1 complex. Furthermore, systemic inhibition of thrombin obliterates TGF-β1 maturation in platelet releasate and rewires the tumor microenvironment toward favorable antitumor immunity, which translates into efficient cancer control either alone or in combination with programmed cell death 1-based immune checkpoint blockade therapy. Last, we demonstrate that soluble GARP and GARP-LTGF-β1 complex are present in the circulation of patients with cancer. Together, our data reveal a mechanism of cancer immune evasion that involves thrombin-mediated GARP cleavage and the subsequent TGF-β1 release from platelets. We propose that blockade of GARP cleavage is a valuable therapeutic strategy to overcome cancer's resistance to immunotherapy.
journal_name
Sci Transl Medjournal_title
Science translational medicineauthors
Metelli A,Wu BX,Riesenberg B,Guglietta S,Huck JD,Mills C,Li A,Rachidi S,Krieg C,Rubinstein MP,Gewirth DT,Sun S,Lilly MB,Wahlquist AH,Carbone DP,Yang Y,Liu B,Li Zdoi
10.1126/scitranslmed.aay4860subject
Has Abstractpub_date
2020-01-08 00:00:00issue
525eissn
1946-6234issn
1946-6242pii
12/525/eaay4860journal_volume
12pub_type
杂志文章abstract::Long synthetic peptides (LSPs) have a variety of important clinical uses as synthetic vaccines and drugs. Techniques for peptide synthesis were revolutionized in the 1960s and 1980s, after which efficient techniques for purification and characterization of the product were developed. These improved techniques allowed ...
journal_title:Science translational medicine
pub_type: 杂志文章,评审
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journal_title:Science translational medicine
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pub_type: 评论,杂志文章
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journal_title:Science translational medicine
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