The role of the immune system is to protect the body from foreign invaders. In responding to cancer, T cells play a central role in the immune system. Programmed death ligand 1 (PD-L1) is one of the inhibitory ligands that, under normal conditions, help maintain immune homeostasis. In many cancers, however, PD-L1 can help tumour cells evade immune system surveillance.

To learn more about Roche’s commitment to cancer immunotherapy, visit http://www.roche.com/cancer-immunothe.... To learn more about our cancer immunotherapy research, visit http://global.researchcancerimmunothe....

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