NCIt definition : A pan-nitric oxide synthase (NOS) inhibitor, with potential immunomodulating and antineoplastic
activities. Upon administration, tilarginine binds to and inhibits NOS, a free radical
signaling molecule that promotes angiogenesis, metastasis, and immunosuppression in
the tumor microenvironment (TME). Reduction in NOS activity may abrogate the immunosuppressive
TME, enhance tumor antigen-specific immune response and inhibit tumor cell proliferation.;
Alternative definition : NCI-GLOSS: An amino acid derivative used to counteract high blood pressure caused
by interleukin-2.;