Checkpoint Ligand Function NCT Trials
TIGIT CD112, CD155 Competes with CD226 to deliver an inhibitory signal, thereby causing an immunosuppressive effect by decreasing T-cell activation, function and inhibition of NK cell activity[@188924; @188925; @188926] NCT05537051,
NCT05102214,
NCT04047862,
NCT05120375,
NCT05417321,
NCT05073484,
NCT04457778,
NCT05390528,
NCT04374877,
NCT04761198,
NCT03667716,
NCT04995523
TIM-3 Galectin-9, HMGB, CAECAM, PtdSer Negative regulator of T-cell response, improves antigen cross presentation, expressed on dysfunctional and exhausted T-cells.[@188926; @188939] May be associated with PD-L1 resistance.[@188940] NCT03489343,
NCT05236608
NCT05357651,
NCT03311412,
NCT03752177,
NCT03708328,
NCT02817633,
NCT04623892,
NCT05645315,
NCT04931654,
NCT05144698,
NCT04773951,
NCT02608268,
NCT03307785,
LAG-3 MHC-II Negatively regulates the T-helper cell activation and proliferation, aiding tumor cells to evade immune surveillance[@188941; @188942; @188943; @188944; @188945] NCT03252938
NCT05101109
NCT05078593
NCT05400265
NCT04618393
NCT04706715
NCT04641871
NCT04140500
NCT03250832
NCT05134948
NCT01968109
NCT02966548
NCT03744468
NCT05144698
NCT05410717
NCT04374877
NCT03219268
NCT03849469
NCT02465060
NCT03607890
NCT03678883
NCT05346276
NCT03625323
4-⁠1BB (CD137) 4-1BBL Known to have immunomodulatory and potential anti-tumor effects as it can stimulate and amplify proliferation and function of cytotoxic T-cells.[@188946; @188947] NCT05117242
NCT05360381
NCT05638334
NCT05159388
NCT04442126
NCT04762641
NCT04903873
NCT03809624
NCT04937153
NCT05040932
NCT04144842
NCT05523947
NCT04839991
NCT04121676
NKG2A HLA-E When activated by its ligand, HLA E (MHC Class I molecule) it dimerized with CD94 and triggers the suppression of NK cells and T cells.[@188948] NCT04914351,
OX-⁠40 (CD134) OX-40L (CD252) OX40 and its ligand depend on the cell its present on and the interaction has a strong immunologic and anti-tumor effect due to the promotion of proliferation of immune cells[@188949; @188950] NCT04991506
NCT04730843
NCT04215978
NCT04198766
NCT03894618
NCT05105971
NCT03831295
NCT05229601
NCT03739931
NCT04952272
NCT04387071
NCT03217747
A2aR A2aR Catabolism of ATP by CD73 in tumor microenvironment leads to high levels of adenosine which interacts with its receptors leading to immune suppression and exhaustion and tumor growth[@188951; @188952] NCT03207867
VISTA VSIG,[@188953] to be identified Inhibits T-cell proliferation and cytokine and chemokine production by T-cells[@188954; @188955] NCT03849469,
NCT05082610,
NCT03740256,
NCT04475523
B7H3 (CD276) To be identified Negatively regulates T-cell function and plays a role in T-cell inhibition, preferentially T helper cells[@188956; @188957; @188958] NCT05276609
NCT05276609
NCT05190185,
NCT04842812,
NCT05293496,
NCT04145622,
NCT05341492,
NCT05405621