lcl161

LCL161 is a SMAC mimetic, an IAP antagonist with oral activity that inhibits XIAP (IC50=35 nM) in HEK293 cells and also inhibits cIAP1 (IC50=0.4 nM) in MDA-MB-231 cells. LCL161 has potential antitumor activity.

cIAP1 ligand 2, a derivative of LCL161, is an IAP ligand that can be connected to the ABL ligand for protein via a linker, resulting in the formation of SNIPER.

cIAP1 ligand 1 (E3 ligase Ligand 12) is an apoptotic protein ligand based on the LCL161 derivative that recruits IAP ubiquitin ligases to degrade target proteins, and can be used in conjunction with androgen receptor ligands for the development of protein degradation agents that can be used in the study of prostate cancer.

SNIPER(ABL)-024, a compound that conjugates GNF5 (ABL inhibitor) to an LCL161 derivative (IAP ligand) via a linker, effectively reduces BCR-ABL protein levels, achieving a half-maximal degradation concentration (DC50) of 5μM[1].

SNIPER(ABL)-033, a compound that conjugates HG-7-85-01 (ABL inhibitor) to a LCL161 derivative (IAP ligand) via a linker, effectively reduces BCR-ABL protein levels, exhibiting a DC50 of 0.3 μM[1].

SNIPER(ABL)-039, conjugating Dasatinib (ABL inhibitor) to an LCL161 derivative (IAP ligand) with a linker, induces the reduction of BCR-ABL protein with a DC50 of 10 nM. IC50s are 0.54 nM for ABL, 10 nM for cIAP1, 12 nM for cIAP2, and 50 nM for XIAP[1].

SNIPER(ABL)-058, a compound that links Imatinib (ABL inhibitor) with a derivative of LCL161 (IAP ligand) through a linker, effectively decreases BCR-ABL protein levels, achieving a half-maximal degradation concentration (DC50) of 10 μM[1].

SNIPER(ER)-87 is a chemical compound composed of a derivative of the inhibitor of apoptosis protein (IAP) ligand LCL161 conjugated to the estrogen receptor α (ERα) ligand 4-hydroxytamoxifen using a PEG linker. It effectively degrades the ERα protein with an IC50 value of 0.097 μM. Within cells, SNIPER(ER)-87 selectively recruits XIAP to ERα, and XIAP functions as the primary E3 ubiquitin ligase responsible for the degradation of ERα induced by SNIPER(ER)-87[1][2].

HG-7-85-01-NH2, as the ligand for SNIPER(ABL)-033, effectively induces the reduction of BCR-ABL protein. This is achieved through SNIPER(ABL)-033, which connects HG-7-85-01 (an ABL inhibitor) to an LCL161 derivative (an IAP ligand) using a linker, demonstrating a DC50 value of 0.3 μM [1].