Btk Degrader

DFCI-002-06 is an orally active dual-target HCK/BTK PROTAC degrader with DC₅₀ values for HCK and BTK of 1.3 and 4.5 nM respectively. DFCI-002-06 retains higher anti-tumor activity than the HCK/BTK dual-target inhibitor (HY-15805), inducing apoptosis in cancer cells. DFCI-002-06 can be used for the study of MYD88 mutant B-cell malignancies.

Bexobrutideg (NX-5948) is an orally active chimeric targeting molecule (CTM) that induces specific BTK protein degradation by the cereblon E3 ligase (CRBN) complex without degradation of other cereblon neo-substrates. Bexobrutideg mediates potent anti-inflammatory activity via BTK degradation with resultant inhibition of B cell activation. Bexobrutideg exhibits potent tumor growth inhibition in TMD8 xenograft models that contain either wild-type BTK or BTKi-resistant mutations. Bexobrutideg is efficacious in a mouse collageninduced arthritis (CIA) model. Bexobrutideg can cross the blood brain barrier (BBB). Bexobrutideg is a PROTAC composed of the ligand for target protein, a linker, and a cereblon E3 ligase (CRBN) complex (Red: BTK ligand (HY-170324); Blue: CRBN ligand (HY-171893); Black: linker).

BGB-16673 (BGB-16673) is an orally active, selective BTK PROTAC degrader (IC₅₀=0.69 nM). BGB-16673 ligates BTK to E3 ubiquitin ligase, causing BTK to undergo polyubiquitination, which is then recognized and degraded by the proteasome, thereby exerting efficient BTK degradation activity. BGB-16673 can be used in the research of B-cell malignancies such as chronic lymphocytic leukemia, small lymphocytic lymphoma, and mantle cell lymphoma.

MT-802 is a BTK PROTAC degrader. MT-802 degrades wild-type BTK (DC₅₀ = 14.6 nM) and BTK mutants including E41K, C481S (DC₅₀ = 14.9 nM), C481R, C481Y, C481T, C481F, L528W, and inhibits their Y223 phosphorylation. BI-4732 can be used for the study of Ibrutinib (HY-10997)-resistant chronic lymphocytic leukemia (CLL). (Pink: BTK ligand (HY-150885), Blue: CRBN Ligand (HY-14658), Black: Linker (HY-141371), E3 ligase ligand-linker conjugate (HY-176340)).

GBD-9 is a degrader based on the E3 ubiquitin ligase CRBN that targets BTK and the G1 to S phase transition protein GSPT1. GBD-9 has both PROTAC and molecular glue properties by inducing ubiquitination and proteasomal degradation of target proteins. GBD-9 can efficiently degrade wild-type and mutant BTK (such as C481S mutation) and GSPT1. GBD-9 significantly inhibits tumor cell proliferation by inducing G1 phase arrest in cancer cells, downregulating anti-apoptotic proteins (BCL-2, MCL-1) and activating Caspase-3 to induce apoptosis. GBD-9 is mainly used in the research of hematological tumors such as diffuse large B-cell lymphoma (DLBCL) and acute myeloid leukemia (AML).
GBD-9 is composed of E3 ubiquitin ligase ligand (pink part) 5-Aminothalidomide (HY-W023573), target protein ligand (blue part) Btk Inhibitor: IBT6A (HY-13036A), and PROTAC linker (black part) Nonanoic acid (HY-N7057).

NRX-0492 is an orally active PROTAC-class BTK degrader. NRX-0492 catalyzes BTK ubiquitination and proteasome degradation (DC₅₀ ≤ 0.2 nM, DC₉₀ ≤ 0.5 nM). NRX-0492 inhibits B cell receptor (BCR) mediated signaling, transcription programs, and chemokine secretion. NRX-0492 has antitumor effects against chronic lymphocytic leukemia.NRX-0492 consists of a target protein ligand (red part) BTK-IN-40 (HY-170324), an E3 ligase ligand (blue part) Thalidomide 5-fluoride (HY-W087383), and a PROTAC linker (black part) (3R)-3-Pyrrolidinemethanol (HY-60263).

DD-03-171 is a PROTAC BTK degrader. DD-03-171 inhibits mantle cell lymphoma (MCL) cell proliferation (IC₅₀ = 5.1 nM) and prolongs the survival of mice bearing a lymphoma PDX model by degrading BTK, IKFZ1, and IKFZ3. DD-03-171 also inhibits platelet function and thrombosis. (Pink: BTK ligand 9 (HY-168292); Black: linker (HY-28875); Blue: Thalidomide-NH-CH2-COOH (HY-131717)).

BTK degrader-1 (compound 1) is a Bruton’s tyrosine kinase (BTK) bifunctional degrader that can be conjugated with CD79b. BTK degrader-1 (compound 1) has anti-tumor effect.

PROTAC BTK Degrader-2 is a potent BTK PROTAC degrader. PROTAC BTK Degrader-2 effectively reduces BTK protein levels.

(R)-Zelebrudomide ((R)-NX-2127) is an isomer of Zelebrudomide (HY-153220). Zelebrudomide is an orally active BTK-targeting PROTAC degrader, with DC₅₀ values of 4.5 nM and 31 nM against wild-type BTK and BTK^C481S mutant, respectively. Zelebrudomide recruits the cereblon E3 ubiquitin ligase complex to mediate the degradation of BTK. Zelebrudomide also acts as a molecular glue to bind the cereblon E3 ubiquitin ligase complex, mediating the degradation of IKZF1 and IKZF3. Zelebrudomide can be used in the research of B-cell malignancies.

PROTAC BTK Degrader-6 is an orally active PROTAC-based BTK degrader with a DC₅₀ of 3.18 nM. PROTAC BTK Degrader-6 induces BTK degradation via proteasomal degradation, ubiquitination, and CRBN ligase recruitment pathways. PROTAC BTK Degrader-6 inhibits NF-κB activation, mRNA expression of IL-1β and IL-6, as well as the secretion of pro-inflammatory cytokines. PROTAC BTK Degrader-6 reduces inflammatory responses in a zymosan-induced mouse model of peritonitis. PROTAC BTK Degrader-6 can be used in peritonitis-related research.

UBX-382 is an orally active BTK PROTAC degrader with a DC₅₀ of 4.56 nM. UBX-382 inhibits B-cell receptor signaling by targeting BTK. UBX-382 shows superior degradation activity for wild-type and mutant BTK proteins. UBX-382 inhibits tumor growth in murine xenograft models harboring wild-type or C481S mutant BTK-expressing TMD-8 cells. UBX-382 can be used for the study of B-cell-related blood cancers.

PROTAC BTK Degrader-10 (Example 1P) is a PROTAC degrader for BTK. PROTAC BTK Degrader-10 can be used for research of chronic lymphocytic leukemia (CLL).

DB0662 is a multi-target kinase-directed PROTAC degrader, targeting kinases including PTK2B, MAPK9, BLK, CSK, LIMK1, etc.

Mal-PEG1-Val-Cit-PABC-diphosphate-BTK degrader-1 is a cleavable linker-payload conjugate and cereblon-binding BTK bifunctional degrader. Mal-PEG1-Val-Cit-PABC-diphosphate-BTK degrader-1 induces BTK degradation and exerts cytotoxic effects when delivered via CD79b monoclonal antibody. Mal-PEG1-Val-Cit-PABC-diphosphate-BTK degrader-1, when formulated as a CD79b antibody-drug conjugate, achieves sustained in vivo BTK degradation in tumor-bearing mice with reduced systemic payload exposure. Mal-PEG1-Val-Cit-PABC-diphosphate-BTK degrader-1 can be used for the research of activated b-cell-like diffuse large b-cell lymphoma (ADC linker: (HY-130944); PROTAC: (HY-163295)).

PTD10 is a selective and potent BTK PROTAC degrader (DC₅₀ = 0.5 nM, K_D = 2.28 nM). PTD10 can recruit cereblon (CRBN) E3 ligase and form a ternary complex with BTK, thereby mediating the ubiquitination and proteasome-dependent degradation of BTK. PTD10 inhibits cancer cells proliferation, and induces cell apoptosis via activation of the caspase-dependent pathway and mitochondrial pathway. PTD10 potently inhibits the BCR, AKT and NF-κB signaling pathway. PTD10 can be used for researches of B-cell malignancies and autoimmune disease.

DBt-10 is a potent BTK PROTAC degrader (DC₅₀: 137 nM). Blue: DCAF1 binder (HY-149934); Black: linker; Pink: BTK ligand.

FDU73 is a highly effective and selective BTK PROTAC degrader with a DC₅₀ of 2.9 nM (in JeKo-1 cells). FDU73 can inhibit the proliferation of tumor cells and exhibits anti-tumor activity. (Pink: BTK ligand-14 (HY-173126); Black: Linker (HY-168297); Blue: E3 ligase ligand 59 (HY-173378); E3 ligase ligand+Linker (HY-173127))

TLT8 is a ByeTAC protein degrader targeting BTK. TLT8 non-covalently binds to Rpn-13 and BTK, thereby inducing BTK degradation. TLT8 can be used in chronic lymphocytic leukemia research. (Rpn-13 ligand: HY-159808; BTK ligand: HY-Z3101; linker: HY-172823).

PROTAC DDa-1 is a potent BTK degrader (DC₅₀: 90 nM).