BTK inhibitors: past, present, and future
Open accessAbstract
Bruton's tyrosine kinase (BTK) inhibitors have revolutionized the treatment landscape for B cell lymphomas such as chronic lymphocytic leukemia (CLL). The first-in-class BTK inhibitor ibrutinib has recently been succeeded by covalent BTK inhibitors that are safer but still face challenges of resistance mutations. The noncovalent BTK inhibitor pirtobrutinib was recently approved for relapsed and refractory CLL, and whether noncovalent BTK inhibitors will supplant covalent BTK inhibitors as upfront treatment options either alone or in combination will be determined. Meanwhile, newer BTK inhibitors and BTK degraders are vying for their place in the potential future landscape of B cell cancers as well as autoimmune diseases. This review will cover the latest progress in BTK inhibitor development and where the field is moving in light of these recent discoveries.
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Additional missense mutations of C481 have been identified which make the BTK-ibrutinib bond reversible and unstable, including C481A, C481R, C481F, and C481Y, among others at C481 which are less common.
“Subsequently, additional missense mutations of C481 have been identified which make the BTK-ibrutinib bond reversible and unstable, including C481A, C481R, C481F, and C481Y, among others at C481 which are less common (12, 24, 36).”
From Resistance Mechanisms and Approach to Chronic Lymphocytic Leukemia after BTK Inhibitor Therapy (2025) · cites this paper as [36]
The “Covalent BTK Inhibitors” section (page unavailable) says that acquired C481 mutations can cause resistance to covalent inhibitors, including ibrutinib. It does not identify C481A, C481R, C481F, or C481Y, establish that they are less common, or describe an unstable, reversible BTK–ibrutinib bond; the paper’s discussion of reversible inhibition concerns noncovalent inhibitors. (LLM, conf=0.86)
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Self-citationKinase-impaired BTK mutations are susceptible to clinical-stage BTK and IKZF1/3 degrader NX-2127
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Resistance Mechanisms and Approach to Chronic Lymphocytic Leukemia after BTK Inhibitor Therapy
Gruessner, C., Wiestner, A., & Sun, C. (2025) · Leukemia & Lymphoma · doi:10.1080/10428194.2025.2466101 · Cited by 6 · see citing works
“…make the BtK-ibrutinib bond reversible and unstable, including c481A, c481R, c481F, and c481Y, among others at c481 which are less common [12,23,35]. in contrast to c481S, which retains the enzymatic activity of BtK, c481Y/R/F cause steric hin-drance and structural clashing within the AtP…”
- Authors
- Cool, A., Nong, T., Montoya, S., & Taylor, J.
- Affiliations
- University of Miami (US)
- Corresponding author
- Taylor, Justin
- Venue
- Trends in Pharmacological Sciences
- Publisher
- Elsevier BV
- Published
- 2024-08
- Volume
- 45
- Issue
- 8
- Pages
- 691-707
- ISSN
- 0165-6147 (ISSN-L)
- PMC
- PMC11864106
- OpenAlex
- W4400736234
- Cited by
- 63
- References
- 7
- Citations by year
- 2026: 36 · 2025: 26 · 2024: 1
- FWCI
- 4.79
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Licence
- www.elsevier.com/tdm/userlicense/1.0/ (tdm)
- www.elsevier.com/legal/tdmrep-license (tdm)
- www.elsevier.com/open-access/userlicense/1.0/ (am, 372 d)
- doi.org/10.15223/policy-017 (stm-asf)
- doi.org/10.15223/policy-037 (stm-asf)
- doi.org/10.15223/policy-012 (stm-asf)
- doi.org/10.15223/policy-029 (stm-asf)
- doi.org/10.15223/policy-004 (stm-asf)
- Locations
- Trends in Pharmacological Sciences (acceptedVersion)
- PubMed (publishedVersion)
- Europe PMC (PubMed Central) (acceptedVersion)
- PubMed Central (acceptedVersion)
- Funders
- National Cancer Institute
- National Institute of General Medical Sciences (R35GM151109)
- National Institutes of Health
- Doris Duke Charitable Foundation
- Edward P Evans Foundation
- Sylvester Comprehensive Cancer Center, University of Miami Health Systems (P30CA240139)
- Topics
- Health Sciences › Medicine › Genetics › Chronic Lymphocytic Leukemia Research
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Degradation and Inhibitors
- Health Sciences › Medicine › Pathology and Forensic Medicine › Lymphoma Diagnosis and Treatment
- Keywords
- BTK inhibitors, ibrutinib, pirtobrutinib, chronic lymphocytic leukemia, B-cell lymphoma, covalent BTK inhibitors, BTK degraders, resistance mutations, autoimmune disease
- MeSH terms
- Agammaglobulinaemia Tyrosine Kinase, Animals, Antineoplastic Agents, Humans, Leukemia, Lymphocytic, Chronic, B-Cell, Protein Kinase Inhibitors
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