Which of the following best describes the outcomes of PD-1 signalling in T cells?

Question

Answer

The PD-1/PD-1L interaction leads to downregulation of the PI3-K / m-TOR/ RAS/Ras/MAPK/Erk pathways and T cell exhaustion

Answer

PD-1 binds to its ligand PD-1L and leads to T cell activation

Answer

PD-1 binds to its ligand CTLA4 and leads to T cell activation

Answer

PD-1 binds to its ligand PD-L1 and induces T cell division and expansion

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