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Yu X, Guo WH, Lin H, Cheng R, Monroy EY, Jin F, Ding L, Lu D, Qi X, Wang MC, Wang J. Discovery of a potent BTK and IKZF1/3 triple degrader through reversible covalent BTK PROTAC development. CURRENT RESEARCH IN CHEMICAL BIOLOGY 2022; 2:100029. [PMID: 36712232 PMCID: PMC9879287 DOI: 10.1016/j.crchbi.2022.100029] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Building on our previous work on ibrutinib-based reversible covalent Bruton's tyrosine kinase (BTK) PROTACs, we explored a different irreversible BTK inhibitor poseltinib as the BTK binder for PROTAC development. Different from ibrutinib, converting the irreversible cysteine reacting acrylamide group of poseltinib to a reversible covalent cyano-acrylamide group dramatically decreases the binding affinity to BTK by over 700 folds. Interestingly, one of the reversible covalent BTK PROTACs based on poseltinib with a rigid linker, dubbed as PS-RC-1, is highly potent (IC50 = ~10 nM) in Mino cells but not in other mantle cell lymphoma (MCL) cell lines, such as Jeko-1 and Rec-R cells. We showed that PS-RC-1 potently induces degradation of IKZF1 and IKZF3 but not BTK or GSPT1, accounting for its toxicity in Mino cells. We further decreased the molecular size of PS-RC-1 by shrinking the BTK binding moiety and developed PS-2 as a potent BTK and IKZF1/3 triple degrader with high specificity.
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Affiliation(s)
- Xin Yu
- Department of Pharmacology and Chemical Biology, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Wen-Hao Guo
- Department of Pharmacology and Chemical Biology, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Hanfeng Lin
- Department of Pharmacology and Chemical Biology, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Ran Cheng
- Department of Pharmacology and Chemical Biology, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Erika Y. Monroy
- Department of Pharmacology and Chemical Biology, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Feng Jin
- Department of Pharmacology and Chemical Biology, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Lang Ding
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, 77030, USA
- Huffington Center on Aging, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Dong Lu
- Department of Pharmacology and Chemical Biology, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Xiaoli Qi
- Department of Pharmacology and Chemical Biology, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Meng C. Wang
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, 77030, USA
- Huffington Center on Aging, Baylor College of Medicine, Houston, TX, 77030, USA
- Howard Hughes Medical Institute, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Jin Wang
- Department of Pharmacology and Chemical Biology, Baylor College of Medicine, Houston, TX, 77030, USA
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, 77030, USA
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2
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Meng A, Humeniuk R, Jürgensmeier JM, Hsueh C, Matzkies F, Grant E, Truong H, Billin AN, Yu H, Feng J, Kwan E, Tarnowski T, Nelson CH. Semi-Mechanistic PK/PD Modeling and Simulation of Irreversible BTK Inhibition to Support Dose Selection of Tirabrutinib in Subjects with RA. Clin Pharmacol Ther 2022; 111:416-424. [PMID: 34623640 PMCID: PMC9298258 DOI: 10.1002/cpt.2439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Accepted: 09/14/2021] [Indexed: 11/08/2022]
Abstract
Tirabrutinib is an irreversible, small-molecule Bruton's tyrosine kinase (BTK) inhibitor, which was approved in Japan (VELEXBRU) to treat B-cell malignancies and is in clinical development for inflammatory diseases. As an application of model-informed drug development, a semimechanistic pharmacokinetic/pharmacodynamic (PK/PD) model for irreversible BTK inhibition of tirabrutinib was developed to support dose selection in clinical development, based on clinical PK and BTK occupancy data from two phase I studies with a wide range of PK exposures in healthy volunteers and in subjects with rheumatoid arthritis. The developed model adequately described and predicted the PK and PD data. Overall, the model-based simulation supported a total daily dose of at least 40 mg, either q.d. or b.i.d., with adequate BTK occupancy (> 90%) for further development in inflammatory diseases. Following the PK/PD modeling and simulation, the relationship between model-predicted BTK occupancy and preliminary clinical efficacy data was also explored and a positive trend was identified between the increasing time above adequate BTK occupancy and better efficacy in treatment for RA by linear regression.
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Affiliation(s)
- Amy Meng
- Gilead Sciences, Inc.Foster CityCaliforniaUSA
| | | | | | | | | | - Ethan Grant
- Gilead Sciences, Inc.Foster CityCaliforniaUSA
| | - Hoa Truong
- Gilead Sciences, Inc.Foster CityCaliforniaUSA
| | | | - Helen Yu
- Gilead Sciences, Inc.Foster CityCaliforniaUSA
| | - Joy Feng
- Gilead Sciences, Inc.Foster CityCaliforniaUSA
| | - Ellen Kwan
- Gilead Sciences, Inc.Foster CityCaliforniaUSA
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3
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Shirley M. Bruton Tyrosine Kinase Inhibitors in B-Cell Malignancies: Their Use and Differential Features. Target Oncol 2022; 17:69-84. [PMID: 34905129 PMCID: PMC8783859 DOI: 10.1007/s11523-021-00857-8] [Citation(s) in RCA: 30] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/21/2021] [Indexed: 12/14/2022]
Abstract
Starting with the first-in-class agent ibrutinib, the development of Bruton tyrosine kinase (BTK) inhibitors has led to dramatic improvements in the management of B-cell malignancies. Subsequently, more-highly selective second-generation BTK inhibitors (including acalabrutinib, zanubrutinib, tirabrutinib and orelabrutinib) have been developed, primarily with an aim to reduce off-target toxicities. More recently, third-generation agents including the non-covalent BTK inhibitors pirtobrutinib and nemtabrutinib have entered later-stage clinical development. BTK inhibitors have shown strong activity in a range of B-cell malignancies, including chronic lymphocytic leukaemia/small lymphocytic lymphoma, mantle cell lymphoma, Waldenström's macroglobulinaemia and marginal zone lymphoma. The agents have acceptable tolerability, with adverse events generally being manageable with dosage modification. This review article summarises the evidence supporting the role of BTK inhibitors in the management of B-cell malignancies, including highlighting some differential features between agents.
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Affiliation(s)
- Matt Shirley
- Springer Nature, Private Bag 65901, Mairangi Bay, Auckland, 0754, New Zealand.
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4
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Liu YT, Ding HH, Lin ZM, Wang Q, Chen L, Liu SS, Yang XQ, Zhu FH, Huang YT, Cao SQ, Yang FM, Song ZL, Ding J, Geng MY, Xie H, Zhang A, He SJ, Zuo JP. A novel tricyclic BTK inhibitor suppresses B cell responses and osteoclastic bone erosion in rheumatoid arthritis. Acta Pharmacol Sin 2021; 42:1653-1664. [PMID: 33441995 PMCID: PMC8463590 DOI: 10.1038/s41401-020-00578-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Accepted: 11/08/2020] [Indexed: 02/02/2023] Open
Abstract
Rheumatoid arthritis (RA) is characterized by joint leukocyte infiltration, synovial inflammation and bone damage result from osteoclastogenesis. Bruton's tyrosine kinase (BTK) is a key regulator of B cell receptor (BCR) and Fc gamma receptor (FcγR) signaling involved in the pathobiology of RA and other autoimmune disorders. SOMCL-17-016 is a potent and selective tricyclic BTK inhibitor, structurally distinct from other known BTK inhibitors. In present study we investigated the therapeutic efficacy of SOMCL-17-016 in a mouse collagen-induced arthritis (CIA) model and underlying mechanisms. CIA mice were administered SOMCL-17-016 (6.25, 12.5, 25 mg·kg-1·d-1, ig), or ibrutinib (25 mg·kg-1·d-1, ig) or acalabrutinib (25 mg·kg-1·d-1, ig) for 15 days. We showed that oral administration of SOMCL-17-016 dose-dependently ameliorated arthritis severity and bone damage in CIA mice; it displayed a higher in vivo efficacy than ibrutinib and acalabrutinib at the corresponding dosage. We found that SOMCL-17-016 administration dose-dependently inhibited anti-IgM-induced proliferation and activation of B cells from CIA mice, and significantly decreased anti-IgM/anti-CD40-stimulated RANKL expression in memory B cells from RA patients. In RANKL/M-CSF-stimulated RAW264.7 cells, SOMCL-17-016 prevented osteoclast differentiation and abolished RANK-BTK-PLCγ2-NFATc1 signaling. In summary, this study demonstrates that SOMCL-17-016 presents distinguished therapeutic effects in the CIA model. SOMCL-17-016 exerts a dual inhibition of B cell function and osteoclastogenesis, suggesting that it to be a promising drug candidate for RA treatment.
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Affiliation(s)
- Yu-Ting Liu
- Laboratory of Immunopharmacology, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Hui-Hua Ding
- Department of Rheumatology, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200001, China
| | - Ze-Min Lin
- Laboratory of Immunopharmacology, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China
| | - Que Wang
- Laboratory of Immunopharmacology, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China
- Laboratory of Immunology and Virology, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
| | - Li Chen
- Laboratory of Immunopharmacology, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Shuang-Shuang Liu
- Laboratory of Immunopharmacology, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xiao-Qian Yang
- Laboratory of Immunopharmacology, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Feng-Hua Zhu
- Laboratory of Immunopharmacology, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yue-Teng Huang
- Laboratory of Immunopharmacology, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China
- Laboratory of Immunology and Virology, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
| | - Shi-Qi Cao
- Laboratory of Immunopharmacology, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Fang-Ming Yang
- Laboratory of Immunopharmacology, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China
- Laboratory of Immunology and Virology, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
| | - Zi-Lan Song
- CAS Key Laboratory of Receptor Research, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China
| | - Jian Ding
- University of Chinese Academy of Sciences, Beijing, 100049, China
- Division of Anti-Tumor Pharmacology, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China
| | - Mei-Yu Geng
- University of Chinese Academy of Sciences, Beijing, 100049, China
- Division of Anti-Tumor Pharmacology, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China
| | - Hua Xie
- University of Chinese Academy of Sciences, Beijing, 100049, China
- Division of Anti-Tumor Pharmacology, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China
| | - Ao Zhang
- University of Chinese Academy of Sciences, Beijing, 100049, China.
- CAS Key Laboratory of Receptor Research, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China.
- School of Pharmacy, Shanghai Jiao Tong University, Shanghai, 200240, China.
| | - Shi-Jun He
- Laboratory of Immunopharmacology, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China.
- University of Chinese Academy of Sciences, Beijing, 100049, China.
| | - Jian-Ping Zuo
- Laboratory of Immunopharmacology, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China.
- University of Chinese Academy of Sciences, Beijing, 100049, China.
- Laboratory of Immunology and Virology, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China.
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5
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Byun JY, Koh YT, Jang SY, Witcher JW, Chan JR, Pustilnik A, Daniels MJ, Kim YH, Suh KH, Linnik MD, Lee YM. Target modulation and pharmacokinetics/pharmacodynamics translation of the BTK inhibitor poseltinib for model-informed phase II dose selection. Sci Rep 2021; 11:18671. [PMID: 34548595 PMCID: PMC8455565 DOI: 10.1038/s41598-021-98255-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Accepted: 09/01/2021] [Indexed: 01/14/2023] Open
Abstract
The selective Bruton tyrosine kinase (BTK) inhibitor poseltinib has been shown to inhibit the BCR signal transduction pathway and cytokine production in B cells (Park et al.Arthritis Res. Ther.18, 91, 10.1186/s13075-016-0988-z, 2016). This study describes the translation of nonclinical research studies to a phase I clinical trial in healthy volunteers in which pharmacokinetics (PKs) and pharmacodynamics (PDs) were evaluated for dose determination. The BTK protein kinase inhibitory effects of poseltinib in human peripheral blood mononuclear cells (PBMCs) and in rats with collagen-induced arthritis (CIA) were evaluated. High-dimensional phosphorylation analysis was conducted on human immune cells such as B cells, CD8 + memory cells, CD4 + memory cells, NK cells, neutrophils, and monocytes, to map the impact of poseltinib on BTK/PLC and AKT signaling pathways. PK and PD profiles were evaluated in a first-in-human study in healthy donors, and a PK/PD model was established based on BTK occupancy. Poseltinib bound to the BTK protein and modulated BTK phosphorylation in human PBMCs. High-dimensional phosphorylation analysis of 94 nodes showed that poseltinib had the highest impact on anti-IgM + CD40L stimulated B cells, however, lower impacts on anti-CD3/CD-28 stimulated T cells, IL-2 stimulated CD4 + T cells and NK cells, M-CSF stimulated monocytes, or LPS-induced granulocytes. In anti-IgM + CD40L stimulated B cells, poseltinib inhibited the phosphorylation of BTK, AKT, and PLCγ2. Moreover, poseltinib dose dependently improved arthritis disease severity in CIA rat model. In a clinical phase I trial for healthy volunteers, poseltinib exhibited dose-dependent and persistent BTK occupancy in PBMCs of all poseltinib-administrated patients in the study. More than 80% of BTK occupancy at 40 mg dosing was maintained for up to 48 h after the first dose. A first-in-human healthy volunteer study of poseltinib established target engagement with circulating BTK protein. Desirable PK and PD properties were observed, and a modeling approach was used for rational dose selection for subsequent trials. Poseltinib was confirmed as a potential BTK inhibitor for the treatment of autoimmune diseases. Trial registration: This article includes the results of a clinical intervention on human participants [NCT01765478].
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Affiliation(s)
- Joo-Yun Byun
- Hanmi Research Center, Hanmi Pharm. Co. Ltd., 14 Wiryeseong-daero, Songpa-gu, Seoul, 05545, Korea
| | - Yi T Koh
- Lilly Biotechnology Center, 10290 Campus Point Drive, San Diego, 92121, USA
| | - Sun Young Jang
- Hanmi Research Center, Hanmi Pharm. Co. Ltd., 14 Wiryeseong-daero, Songpa-gu, Seoul, 05545, Korea
| | - Jennifer W Witcher
- Lilly Biotechnology Center, 10290 Campus Point Drive, San Diego, 92121, USA
| | - Jason R Chan
- Lilly Biotechnology Center, 10290 Campus Point Drive, San Diego, 92121, USA
| | - Anna Pustilnik
- Lilly Biotechnology Center, 10290 Campus Point Drive, San Diego, 92121, USA
| | - Mark J Daniels
- Lilly Biotechnology Center, 10290 Campus Point Drive, San Diego, 92121, USA
| | - Young Hoon Kim
- Hanmi Research Center, Hanmi Pharm. Co. Ltd., 14 Wiryeseong-daero, Songpa-gu, Seoul, 05545, Korea
| | - Kwee Hyun Suh
- Hanmi Research Center, Hanmi Pharm. Co. Ltd., 14 Wiryeseong-daero, Songpa-gu, Seoul, 05545, Korea
| | - Matthew D Linnik
- Lilly Biotechnology Center, 10290 Campus Point Drive, San Diego, 92121, USA.
| | - Young-Mi Lee
- Hanmi Research Center, Hanmi Pharm. Co. Ltd., 14 Wiryeseong-daero, Songpa-gu, Seoul, 05545, Korea.
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6
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von Hundelshausen P, Siess W. Bleeding by Bruton Tyrosine Kinase-Inhibitors: Dependency on Drug Type and Disease. Cancers (Basel) 2021; 13:1103. [PMID: 33806595 PMCID: PMC7961939 DOI: 10.3390/cancers13051103] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Revised: 03/02/2021] [Accepted: 03/03/2021] [Indexed: 12/13/2022] Open
Abstract
Bruton tyrosine kinase (Btk) is expressed in B-lymphocytes, myeloid cells and platelets, and Btk-inhibitors (BTKi) are used to treat patients with B-cell malignancies, developed against autoimmune diseases, have been proposed as novel antithrombotic drugs, and been tested in patients with severe COVID-19. However, mild bleeding is frequent in patients with B-cell malignancies treated with the irreversible BTKi ibrutinib and the recently approved 2nd generation BTKi acalabrutinib, zanubrutinib and tirabrutinib, and also in volunteers receiving in a phase-1 study the novel irreversible BTKi BI-705564. In contrast, no bleeding has been reported in clinical trials of other BTKi. These include the brain-penetrant irreversible tolebrutinib and evobrutinib (against multiple sclerosis), the irreversible branebrutinib, the reversible BMS-986142 and fenebrutinib (targeting rheumatoid arthritis and lupus erythematodes), and the reversible covalent rilzabrutinib (against pemphigus and immune thrombocytopenia). Remibrutinib, a novel highly selective covalent BTKi, is currently in clinical studies of autoimmune dermatological disorders. This review describes twelve BTKi approved or in clinical trials. By focusing on their pharmacological properties, targeted disease, bleeding side effects and actions on platelets it attempts to clarify the mechanisms underlying bleeding. Specific platelet function tests in blood might help to estimate the probability of bleeding of newly developed BTKi.
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Affiliation(s)
- Philipp von Hundelshausen
- Institute for Cardiovascular Prevention, Ludwig-Maximilians University (LMU), 80336 Munich, Germany;
- German Center for Cardiovascular Research (DZHK), Partner Site Munich Heart Alliance, 80336 Munich, Germany
| | - Wolfgang Siess
- Institute for Cardiovascular Prevention, Ludwig-Maximilians University (LMU), 80336 Munich, Germany;
- German Center for Cardiovascular Research (DZHK), Partner Site Munich Heart Alliance, 80336 Munich, Germany
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7
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Danilov AV, Herbaux C, Walter HS, Hillmen P, Rule SA, Kio EA, Karlin L, Dyer MJS, Mitra SS, Yi PC, Humeniuk R, Huang X, Zhou Z, Bhargava P, Jürgensmeier JM, Fegan CD. Phase Ib Study of Tirabrutinib in Combination with Idelalisib or Entospletinib in Previously Treated Chronic Lymphocytic Leukemia. Clin Cancer Res 2020; 26:2810-2818. [PMID: 32156743 DOI: 10.1158/1078-0432.ccr-19-3504] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Revised: 02/02/2020] [Accepted: 03/06/2020] [Indexed: 11/16/2022]
Abstract
PURPOSE Bruton tyrosine kinase (BTK) inhibition alone leads to incomplete responses in chronic lymphocytic leukemia (CLL). Combination therapy may reduce activation of escape pathways and deepen responses. This open-label, phase Ib, sequential dose-escalation and dose-expansion study evaluated the safety, tolerability, pharmacokinetics, and preliminary efficacy of the selective BTK inhibitor tirabrutinib alone, in combination with the PI3K delta (PI3Kδ) inhibitor idelalisib, or with the spleen tyrosine kinase (SYK) inhibitor entospletinib in patients with relapsed/refractory CLL. PATIENTS AND METHODS Patients received either tirabrutinib monotherapy (80 mg every day) or tirabrutinib 20-150 mg every day in combination with either idelalisib (50 mg twice a day or 100 mg every day) or entospletinib (200 mg or 400 mg every day). RESULTS Fifty-three patients were included. Systemic tirabrutinib exposure was comparable between monotherapy and combination therapy. No MTD was identified. Across all treatment groups, the most common adverse event was diarrhea (43%, 1 patient grade ≥3); discontinuation due to adverse events was uncommon (13%). Objective response rates were 83%, 93%, and 100%, and complete responses were 7%, 7%, and 10% in patients receiving tirabrutinib, tirabrutinib/idelalisib, and tirabrutinib/entospletinib, respectively. As of February 21, 2019, 46 of 53 patients continue to receive treatment on study. CONCLUSIONS Tirabrutinib in combination with idelalisib or entospletinib was well tolerated in patients with CLL, establishing an acceptable safety profile for concurrent selective inhibition of BTK with either PI3Kδ or SYK. This small study did not establish a superior efficacy of the combinations over tirabrutinib alone. This trial is registered at www.clinicaltrials.gov (NCT02457598).
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Affiliation(s)
- Alexey V Danilov
- Knight Cancer Institute, Oregon Health and Science University, Portland, Oregon. .,City of Hope National Medical Center, Duarte, California
| | | | - Harriet S Walter
- Ernest and Helen Scott Haematological Research Institute, University of Leicester, Leicester, United Kingdom
| | - Peter Hillmen
- Experimental Haematology, University of Leeds, Leeds, United Kingdom
| | - Simon A Rule
- Department of Haematology, Plymouth University Medical School, Plymouth, United Kingdom
| | | | - Lionel Karlin
- Department of Hematology, Lyon University Hospital, Pierre-Benite, France
| | - Martin J S Dyer
- Ernest and Helen Scott Haematological Research Institute, University of Leicester, Leicester, United Kingdom
| | | | | | | | - Xi Huang
- Gilead Sciences, Inc., Foster City, California
| | - Ziqian Zhou
- Gilead Sciences, Inc., Foster City, California
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8
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Borsari C, Trader DJ, Tait A, Costi MP. Designing Chimeric Molecules for Drug Discovery by Leveraging Chemical Biology. J Med Chem 2020; 63:1908-1928. [PMID: 32023055 PMCID: PMC7997565 DOI: 10.1021/acs.jmedchem.9b01456] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
After the first seed concept introduced in the 18th century, different disciplines have attributed different names to dual-functional molecules depending on their application, including bioconjugates, bifunctional compounds, multitargeting molecules, chimeras, hybrids, engineered compounds. However, these engineered constructs share a general structure: a first component that targets a specific cell and a second component that exerts the pharmacological activity. A stable or cleavable linker connects the two modules of a chimera. Herein, we discuss the recent advances in the rapidly expanding field of chimeric molecules leveraging chemical biology concepts. This Perspective is focused on bifunctional compounds in which one component is a lead compound or a drug. In detail, we discuss chemical features of chimeric molecules and their use for targeted delivery and for target engagement studies.
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Affiliation(s)
- Chiara Borsari
- Department of Biomedicine, University of Basel, Mattenstrasse 28, 4058 Basel, Switzerland
| | - Darci J Trader
- Department of Medicinal Chemistry and Molecular Pharmacology, Purdue University, 610 Purdue Mall, West Lafayette, Indiana 47907, United States
| | - Annalisa Tait
- Department of Life Sciences, University of Modena and Reggio Emilia, Via Campi 103, 41125 Modena, Italy
| | - Maria P Costi
- Department of Life Sciences, University of Modena and Reggio Emilia, Via Campi 103, 41125 Modena, Italy
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9
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Ong LL, Vasta JD, Monereau L, Locke G, Ribeiro H, Pattoli MA, Skala S, Burke JR, Watterson SH, Tino JA, Meisenheimer PL, Arey B, Lippy J, Zhang L, Robers MB, Tebben A, Chaudhry C. A High-Throughput BRET Cellular Target Engagement Assay Links Biochemical to Cellular Activity for Bruton's Tyrosine Kinase. SLAS DISCOVERY 2019; 25:176-185. [PMID: 31709883 DOI: 10.1177/2472555219884881] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Protein kinases are intensely studied mediators of cellular signaling. While traditional biochemical screens are capable of identifying compounds that modulate kinase activity, these assays are limited in their capability of predicting compound behavior in a cellular environment. Here, we aim to bridge target engagement and compound-cellular phenotypic behavior by utilizing a bioluminescence resonance energy transfer (BRET) assay to characterize target occupancy within living cells for Bruton's tyrosine kinase (BTK). Using a diverse chemical set of BTK inhibitors, we determine intracellular engagement affinity profiles and successfully correlate these measurements with BTK cellular functional readouts. In addition, we leveraged the kinetic capability of this technology to gain insight into in-cell target residence time and the duration of target engagement, and to explore a structural hypothesis.
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Affiliation(s)
- L L Ong
- Leads Discovery and Optimization, Bristol Myers Squibb, Princeton, NJ, USA
| | - J D Vasta
- Promega Corporation, Madison, WI, USA
| | - L Monereau
- Leads Discovery and Optimization, Bristol Myers Squibb, Princeton, NJ, USA
| | - G Locke
- Leads Discovery and Optimization, Bristol Myers Squibb, Princeton, NJ, USA
| | - H Ribeiro
- Leads Discovery and Optimization, Bristol Myers Squibb, Princeton, NJ, USA
| | - M A Pattoli
- Immunoscience Discovery Biology, Bristol Myers Squibb, Princeton, NJ, USA
| | - S Skala
- Immunoscience Discovery Biology, Bristol Myers Squibb, Princeton, NJ, USA
| | - J R Burke
- Immunoscience Discovery Biology, Bristol Myers Squibb, Princeton, NJ, USA
| | - S H Watterson
- Immunosciences Discovery Chemistry, Bristol Myers Squibb, Princeton, NJ, USA
| | - J A Tino
- Immunosciences Discovery Chemistry, Bristol Myers Squibb, Princeton, NJ, USA
| | | | - B Arey
- Leads Discovery and Optimization, Bristol Myers Squibb, Princeton, NJ, USA
| | - J Lippy
- Leads Discovery and Optimization, Bristol Myers Squibb, Princeton, NJ, USA
| | - L Zhang
- Leads Discovery and Optimization, Bristol Myers Squibb, Princeton, NJ, USA
| | | | - A Tebben
- Molecular Structure and Design, Molecular Discovery Technologies, Bristol Myers Squibb, Princeton, NJ, USA
| | - C Chaudhry
- Leads Discovery and Optimization, Bristol Myers Squibb, Princeton, NJ, USA
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10
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Kath JE, Baranczak A. Target engagement approaches for pharmacological evaluation in animal models. Chem Commun (Camb) 2019; 55:9241-9250. [PMID: 31328738 DOI: 10.1039/c9cc02824b] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The field of chemical biology has introduced several approaches, typically using chemical probes, to measure the direct binding interaction of a small molecule with its biological target in cells. The use of these direct target engagement assays in pharmaceutical development can support mechanism of action hypothesis testing, rank ordering of compounds, and iterative improvements of chemical matter. This Feature Article highlights a newer application of these approaches: the quantification of target engagement in animal models to support late stage preclinical development and the nomination of a drug candidate to clinical trials. Broadly speaking, these efforts can be divided between compounds that covalently and reversibly interact with protein targets; recent examples for both categories are discussed for a range of targets, along with their limitations. New, promising technologies are also highlighted, in addition to the application of target engagement determination to new therapeutic modalities.
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Affiliation(s)
- James E Kath
- Drug Discovery Science and Technology, AbbVie Inc., 1 North Waukegan Road, North Chicago, Illinois 60064-6101, USA.
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