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2015 ; 6
(40
): 42733-48
Nephropedia Template TP
gab.com Text
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English Wikipedia
Identification of a novel platelet antagonist that binds to CLEC-2 and suppresses
podoplanin-induced platelet aggregation and cancer metastasis
#MMPMID26528756
Chang YW
; Hsieh PW
; Chang YT
; Lu MH
; Huang TF
; Chong KY
; Liao HR
; Cheng JC
; Tseng CP
Oncotarget
2015[Dec]; 6
(40
): 42733-48
PMID26528756
show ga
Podoplanin (PDPN) enhances tumor metastases by eliciting tumor cell-induced
platelet aggregation (TCIPA) through activation of platelet C-type lectin-like
receptor 2 (CLEC-2). A novel and non-cytotoxic 5-nitrobenzoate compound 2CP was
synthesized that specifically inhibited the PDPN/CLEC-2 interaction and TCIPA
with no effect on platelet aggregation stimulated by other platelet agonists. 2CP
possessed anti-cancer metastatic activity in vivo and augmented the therapeutic
efficacy of cisplatin in the experimental animal model without causing a bleeding
risk. Analysis of the molecular action of 2CP further revealed that Akt1/PDK1 and
PKC? were two alternative CLEC-2 signaling pathways mediating PDPN-induced
platelet activation. 2CP directly bound to CLEC-2 and, by competing with the same
binding pocket of PDPN in CLEC-2, inhibited PDPN-mediated platelet activation.
This study provides evidence that 2CP is the first defined platelet antagonist
with CLEC-2 binding activity. The augmentation in the therapeutic efficacy of
cisplatin by 2CP suggests that a combination of a chemotherapeutic agent and a
drug with anti-TCIPA activity such as 2CP may prove clinically effective.