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10.1371/journal.ppat.1007175

http://scihub22266oqcxt.onion/10.1371/journal.ppat.1007175
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C6053240!6053240!29985958
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suck abstract from ncbi


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pmid29985958      PLoS+Pathog 2018 ; 14 (7): ä
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  • KSHV-induced ligand mediated activation of PDGF receptor-alpha drives Kaposi s sarcomagenesis #MMPMID29985958
  • Cavallin LE; Ma Q; Naipauer J; Gupta S; Kurian M; Locatelli P; Romanelli P; Nadji M; Goldschmidt-Clermont PJ; Mesri EA
  • PLoS Pathog 2018[Jul]; 14 (7): ä PMID29985958show ga
  • Kaposi?s sarcoma (KS) herpesvirus (KSHV) causes KS, an angiogenic AIDS-associated spindle-cell neoplasm, by activating host oncogenic signaling cascades through autocrine and paracrine mechanisms. Tyrosine kinase receptor (RTK) proteomic arrays, identified PDGF receptor-alpha (PDGFRA) as the predominantly-activated RTK in KSHV-induced mouse KS-tumors. We show that: 1) KSHV lytic replication and the vGPCR can activate PDGFRA through upregulation of its ligands PDGFA/B, which increase c-myc, VEGF and KSHV gene expression in infected cells 2) KSHV infected spindle cells of most AIDS-KS lesions display robust phospho-PDGFRA staining 3) blocking PDGFRA-signaling with N-acetyl-cysteine, RTK-inhibitors Imatinib and Sunitinib, or dominant-negative PDGFRA inhibits tumorigenesis 4) PDGFRA D842V activating-mutation confers resistance to Imatinib in mouse-KS tumorigenesis. Our data show that KSHV usurps sarcomagenic PDGFRA signaling to drive KS. This and the fact that PDGFRA drives non-viral sarcomas highlights the importance for KSHV-induced ligand-mediated activation of PDGFRA in KS sarcomagenesis and shows that this oncogenic axis could be successfully blocked to impede KS tumor growth.
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