Product Description
Tumor cells can express the PD-L1 protein to protect themselves from immune system attack by binding to the PD-1 receptor on T cells, which suppresses the T cells’ ability to destroy the tumor.15 PD-L1 is frequently over expressed in placenta, and many human tumors such as melanoma, diffuse large B-cell lymphoma, and carcinomas of the lung, bladder, breast, kidney and colon.16- 18