Title:Next-generation Bruton’s Tyrosine Kinase (BTK) Inhibitors Potentially
Targeting BTK C481S Mutation- Recent Developments and Perspectives
Volume: 22
Issue: 20
Author(s): Debasis Das*, Jingbing Wang and Jian Hong
Affiliation:
- Discovery Chemistry Research, Arromax Pharmatech Co. Ltd. Sangtiandao Innovation Park, No. 1 Huayun Road, SIP, Suzhou 215123, P.R. China
Keywords:
Bruton’s tyrosine kinase, BCR signalling, Irreversible inhibitor, Reversible inhibitor, PROTAC, Xenografts, Anticancer.
Abstract: Bruton’s tyrosine kinase (BTK) plays a vital role in B-cell antigen receptor (BCR) signalling
transduction pathway. Controlling BCR signalling by BTK inhibitors is a promising therapeutic
approach for the treatment of inflammatory and autoimmune diseases. Since the approval of
ibrutinib for the treatment of different haematological cancers in 2013, great efforts have been made
to explore new BTK inhibitors. Despite the remarkable potency and efficacy of first and second
generation irreversible BTK inhibitors against various lymphomas and leukaemia, there are also
some clinical limitations, such as off-target toxicity and primary/acquired drug resistance. Acquired
drug resistance due to the C481S mutation in BTK is the major challenging problem of irreversible
inhibitors. After, the BTK C481S mutation, the irreversible covalent inhibitors cannot form covalent
bond with BTK and drop activities. Hence, there is an urgent need to develop novel BTK inhibitors
to overcome the mutation problem. In recent years, a few reversible BTK inhibitors have been developed
and are under clinical evaluation stages. In addition, a few reversible BTK-PROTACs have
been explored and under developments. A number of reversible non-covalent BTK inhibitors, including
MK1026/ ARQ531, LOXO305, fenebrutinib are at different stages of clinical trials for autoimmune
diseases. In this review, we summarized the discovery and development of nextgeneration
BTK inhibitors, especially targeting BTK C481S mutation and their applications for the
treatment of lymphomas and autoimmune diseases.