Checkpoint Kinase (Chk) Degrader

PROTAC Chk1 degrader-1 is a Chk1-targeting PROTAC.PROTAC Chk1 degrader-1 recruits the Cereblon E3 ligase to induce ubiquitination and proteasomal degradation of Chk1.PROTAC Chk1 degrader-1 exhibits Chk1 degradation activity in malignant melanoma cells without showing a hook effect.PROTAC Chk1 degrader-1 can be used for the research of malignant melanoma.

MA203 is a selective CHK1 PROTAC degrader. MA203 targets activated CHK1 for degradation by recruiting the CRBN E3 ubiquitin ligase, thereby completely abolishing both its catalytic and non-catalytic functions and ultimately triggering DNA replication catastrophe and apoptosis. MA203 can be used in research related to pancreatic ductal adenocarcinoma, colorectal cancer, and acute lymphoblastic leukemia.

PROTAC ATR degrader-3 is a potent CRBN-based ATR PROTAC degrader with a DC₅₀ of 127 nM. PROTAC ATR degrader-3 also degrades CHK1 with an DC₅₀ of 135 nM. PROTAC ATR degrader-3 inhibits cancer cells proliferation, migration and invasion, triggers apoptosis and induces S phase arrest and DNA damage. PROTAC ATR degrader-3 achieves tumor growth inhibition in LoVo xenograft mouse model without apparent toxicity. PROTAC ATR degrader-3 can be used for the research of colorectal cancer.

PROTAC FLT3/CHK1 Degrader-1 is a PROTAC FLT3/CHK1 degrader, with DC₅₀ values of 5.88 nM (FLT3) and 4.17 nM (CHK1), respectively. PROTAC FLT3/CHK1 Degrader-1 can inhibit the phosphorylation of FLT3 downstream signaling effectors STAT5 (Tyr694), AKT (Ser473), and ERK (Tyr204), downregulate the protein level of c-Myc and maintain the expression of p53 protein. PROTAC FLT3/CHK1 Degrader-1 induces Apoptosis in cells. PROTAC FLT3/CHK1 Degrader-1 shows significant anti-tumor efficacy in mice bearing MV-4-11 subcutaneous xenografts. PROTAC FLT3/CHK1 Degrader-1 can be used for the study of acute myeloid leukemia (AML).