Dual Targeting Nanoparticle Stimulates the Immune System To Inhibit Tumor Growth.

ABSTRACT: We describe the development of a nanoparticle platform that overcomes the immunosuppressive tumor microenvironment. These nanoparticles are coated with two different antibodies that simultaneously block the inhibitory checkpoint PD-L1 signal and stimulate T cells via the 4-1BB co-stimulatory pathway. These "immunoswitch" particles significantly delay tumor growth and extend survival in multiple in vivo models of murine melanoma and colon cancer in comparison to the use of soluble antibodies or nanoparticles separately conjugated with the inhibitory and stimulating antibodies. Immunoswitch particles enhance effector-target cell conjugation and bypass the requirement for a priori knowledge of tumor antigens. The use of the immunoswitch nanoparticles resulted in an increased density, specific

SUBMITTER: Kosmides AK 

PROVIDER: S-EPMC8635119 | biostudies-literature | 2017 Jun

REPOSITORIES: biostudies-literature