Abstract:
:Malignant pleural mesothelioma (MPM) is an aggressive malignant tumor that secretes various angiogenic factors. The main inhibitor of plasminogen activators, PAI-1 (SERPINE1), has been implicated in tumor progression and angiogenesis, and high PAI-1 expression has been associated with poor prognosis in MPM patients. In this study, we examined the antiangiogenic effects of PAI-1 inhibition in MPM. We administered the PAI-1 inhibitor, SK-216, to orthotopic mouse models in which MPM cells expressing high levels of VEGF (VEGFA) or bFGF (FGF2) were intrapleurally transplanted. SK-216 administration reduced tumor weights and the degree of angiogenesis in intrapleural tumors, irrespective of their angiogenic expression profiles. In addition, a combination of SK-216 and the chemotherapeutic agent cisplatin significantly reduced tumor weights compared with monotherapy, prolonging the survival of animals compared with cisplatin treatment alone. Furthermore, SK-216 inhibited migration and tube formation of cultured human umbilical vein endothelial cells induced by various angiogenic factors known to be secreted by MPM. These findings suggest that PAI-1 inactivation by SK-216 may represent a general strategy for inhibiting angiogenesis, including for the treatment of MPM. Cancer Res; 76(11); 3285-94. ©2016 AACR.
journal_name
Cancer Resjournal_title
Cancer researchauthors
Takayama Y,Hattori N,Hamada H,Masuda T,Omori K,Akita S,Iwamoto H,Fujitaka K,Kohno Ndoi
10.1158/0008-5472.CAN-15-1796subject
Has Abstractpub_date
2016-06-01 00:00:00pages
3285-94issue
11eissn
0008-5472issn
1538-7445pii
0008-5472.CAN-15-1796journal_volume
76pub_type
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