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Bromberger S, Zadorozhna Y, Ressler JM, Holzner S, Nawrocki A, Zila N, Springer A, Røssel Larsen M, Schossleitner K. Off-targets of BRAF inhibitors disrupt endothelial signaling and vascular barrier function. Life Sci Alliance 2024; 7:e202402671. [PMID: 38839106 PMCID: PMC11153892 DOI: 10.26508/lsa.202402671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2024] [Revised: 05/17/2024] [Accepted: 05/20/2024] [Indexed: 06/07/2024] Open
Abstract
Targeted therapies against mutant BRAF are effectively used in combination with MEK inhibitors (MEKi) to treat advanced melanoma. However, treatment success is affected by resistance and adverse events (AEs). Approved BRAF inhibitors (BRAFi) show high levels of target promiscuity, which can contribute to these effects. The blood vessel lining is in direct contact with high plasma concentrations of BRAFi, but effects of the inhibitors in this cell type are unknown. Hence, we aimed to characterize responses to approved BRAFi for melanoma in the vascular endothelium. We showed that clinically approved BRAFi induced a paradoxical activation of endothelial MAPK signaling. Moreover, phosphoproteomics revealed distinct sets of off-targets per inhibitor. Endothelial barrier function and junction integrity were impaired upon treatment with vemurafenib and the next-generation dimerization inhibitor PLX8394, but not with dabrafenib or encorafenib. Together, these findings provide insights into the surprisingly distinct side effects of BRAFi on endothelial signaling and functionality. Better understanding of off-target effects could help to identify molecular mechanisms behind AEs and guide the continued development of therapies for BRAF-mutant melanoma.
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Affiliation(s)
- Sophie Bromberger
- https://ror.org/05n3x4p02 Department of Dermatology, Medical University of Vienna, Vienna, Austria
| | - Yuliia Zadorozhna
- https://ror.org/05n3x4p02 Department of Dermatology, Medical University of Vienna, Vienna, Austria
| | - Julia Maria Ressler
- https://ror.org/05n3x4p02 Department of Dermatology, Medical University of Vienna, Vienna, Austria
| | - Silvio Holzner
- https://ror.org/05n3x4p02 Department of Dermatology, Medical University of Vienna, Vienna, Austria
| | - Arkadiusz Nawrocki
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, Odense, Denmark
| | - Nina Zila
- https://ror.org/05n3x4p02 Department of Dermatology, Medical University of Vienna, Vienna, Austria
- University of Applied Sciences FH Campus Wien, Division of Biomedical Science, Vienna, Austria
| | - Alexander Springer
- https://ror.org/05n3x4p02 Department of Pediatric Surgery, Medical University of Vienna, Vienna, Austria
| | - Martin Røssel Larsen
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, Odense, Denmark
| | - Klaudia Schossleitner
- https://ror.org/05n3x4p02 Department of Dermatology, Medical University of Vienna, Vienna, Austria
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2
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Benfield AH, Vernen F, Young RSE, Nadal-Bufí F, Lamb H, Hammerlindl H, Craik DJ, Schaider H, Lawrence N, Blanksby SJ, Henriques ST. Cyclic tachyplesin I kills proliferative, non-proliferative and drug-resistant melanoma cells without inducing resistance. Pharmacol Res 2024; 207:107298. [PMID: 39032840 DOI: 10.1016/j.phrs.2024.107298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/17/2024] [Revised: 07/05/2024] [Accepted: 07/05/2024] [Indexed: 07/23/2024]
Abstract
Acquired drug resistance is the major cause for disease recurrence in cancer patients, and this is particularly true for patients with metastatic melanoma that carry a BRAF V600E mutation. To address this problem, we investigated cyclic membrane-active peptides as an alternative therapeutic modality to kill drug-tolerant and resistant melanoma cells to avoid acquired drug resistance. We selected two stable cyclic peptides (cTI and cGm), previously shown to have anti-melanoma properties, and compared them with dabrafenib, a drug used to treat cancer patients with the BRAF V600E mutation. The peptides act via a fast membrane-permeabilizing mechanism and kill metastatic melanoma cells that are sensitive, tolerant, or resistant to dabrafenib. Melanoma cells do not become resistant to long-term treatment with cTI, nor do they evolve their lipid membrane composition, as measured by lipidomic and proteomic studies. In vivo studies in mice demonstrated that the combination treatment of cTI and dabrafenib resulted in fewer metastases and improved overall survival. Such cyclic membrane-active peptides are thus well suited as templates to design new anticancer therapeutic strategies.
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Affiliation(s)
- Aurélie H Benfield
- School of Biomedical Sciences, Faculty of Health, Queensland University of Technology, Translational Research Institute, Brisbane, QLD 4102, Australia
| | - Felicitas Vernen
- Institute for Molecular Bioscience, Australian Research Council Centre of Excellence for Innovations in Peptide and Protein Science, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Reuben S E Young
- Central Analytical Research Facility and School of Chemistry and Physics, Queensland University of Technology, Brisbane, QLD 4000, Australia
| | - Ferran Nadal-Bufí
- School of Biomedical Sciences, Faculty of Health, Queensland University of Technology, Translational Research Institute, Brisbane, QLD 4102, Australia
| | - Henry Lamb
- School of Biomedical Sciences, Faculty of Health, Queensland University of Technology, Translational Research Institute, Brisbane, QLD 4102, Australia
| | - Heinz Hammerlindl
- Frazer Institute, The University of Queensland, Translational Research Institute, Brisbane, QLD 4102, Australia
| | - David J Craik
- Institute for Molecular Bioscience, Australian Research Council Centre of Excellence for Innovations in Peptide and Protein Science, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Helmut Schaider
- Frazer Institute, The University of Queensland, Translational Research Institute, Brisbane, QLD 4102, Australia
| | - Nicole Lawrence
- Institute for Molecular Bioscience, Australian Research Council Centre of Excellence for Innovations in Peptide and Protein Science, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Stephen J Blanksby
- Central Analytical Research Facility and School of Chemistry and Physics, Queensland University of Technology, Brisbane, QLD 4000, Australia
| | - Sónia Troeira Henriques
- School of Biomedical Sciences, Faculty of Health, Queensland University of Technology, Translational Research Institute, Brisbane, QLD 4102, Australia; Institute for Molecular Bioscience, Australian Research Council Centre of Excellence for Innovations in Peptide and Protein Science, The University of Queensland, Brisbane, QLD 4072, Australia.
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3
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Townley RA, Stacy KS, Cheraghi F, de la Cova CC. The Raf/LIN-45 C-terminal distal tail segment negatively regulates signaling in Caenorhabditis elegans. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.07.16.603803. [PMID: 39071268 PMCID: PMC11275798 DOI: 10.1101/2024.07.16.603803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/30/2024]
Abstract
Raf protein kinases act as Ras-GTP sensing components of the ERK signal transduction pathway in animal cells, influencing cell proliferation, differentiation, and survival. In humans, somatic and germline mutations in the genes BRAF and RAF1 are associated with malignancies and developmental disorders. Recent studies shed light on the structure of activated Raf, a heterotetramer consisting of Raf and 14-3-3 dimers, and raised the possibility that a Raf C-terminal distal tail segment (DTS) regulates activation. We investigated the role of the DTS using the Caenorhabditis elegans, which has a single Raf ortholog termed lin-45 . We discovered that truncations removing the DTS strongly enhanced lin-45(S312A) , a weak gain-of-function allele equivalent to RAF1 mutations found in patients with Noonan Syndrome. We generated mutations to test three elements of the LIN-45 DTS, which we termed the active site binding sequence (ASBS), the KTP motif, and the aromatic cluster. In the context of lin-45(S312A), mutation of either the ASBS, KTP motif, or aromatic cluster enhanced activity. We used AlphaFold to predict DTS protein interactions for LIN-45, fly Raf, and human BRAF, within the activated heterotetramer complex. We propose distinct functions for the LIN-45 DTS elements: i) the ASBS binds the kinase active site as an inhibitor, ii) phosphorylation of the KTP motif modulates DTS-kinase domain interaction, and iii) the aromatic cluster anchors the DTS in an inhibitory conformation. This work establishes that the Raf/LIN-45 DTS negatively regulates signaling in C. elegans and provides a model for its function in other Raf proteins.
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Toye E, Chehrazi-Raffle A, Hwang J, Antonarakis ES. Targeting the multifaceted BRAF in cancer: New directions. Oncotarget 2024; 15:486-492. [PMID: 39018217 PMCID: PMC11254297 DOI: 10.18632/oncotarget.28612] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2024] [Accepted: 07/07/2024] [Indexed: 07/19/2024] Open
Abstract
Activating mutations in the mitogen-activated protein kinase (MAPK) pathway represent driver alterations governing tumorigenesis, metastasis, and therapy resistance. MAPK activation predominantly occurs through genomic alterations in RAS and BRAF. BRAF is an effector kinase that functions downstream of RAS and propagates this oncogenic activity through MEK and ERK. Across cancers, BRAF alterations include gain-of-function mutations, copy-number alterations, and structural rearrangements. In cancer patients, BRAF-targeting precision therapeutics are effective against Class I BRAF alterations (p.V600 hotspot mutations) in tumors such as melanomas, thyroid cancers, and colorectal cancers. However, numerous non-Class I BRAF inhibitors are also in development and have been explored in some cancers. Here we discuss the diverse forms of BRAF alterations found in human cancers and the strategies to inhibit them in patients harboring cancers of distinct origins.
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Affiliation(s)
- Eamon Toye
- Masonic Cancer Center, University of Minnesota-Twin Cities, Minneapolis, MN 55455, USA
- Department of Medicine, University of Minnesota-Twin Cities, Minneapolis, MN 55455, USA
- Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19146, USA
| | | | - Justin Hwang
- Masonic Cancer Center, University of Minnesota-Twin Cities, Minneapolis, MN 55455, USA
- Department of Medicine, University of Minnesota-Twin Cities, Minneapolis, MN 55455, USA
| | - Emmanuel S. Antonarakis
- Masonic Cancer Center, University of Minnesota-Twin Cities, Minneapolis, MN 55455, USA
- Department of Medicine, University of Minnesota-Twin Cities, Minneapolis, MN 55455, USA
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5
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Bielamowicz K, Dimitrion P, Abla O, Bomken S, Campbell P, Collin M, Degar B, Diamond E, Eckstein OS, El-Mallawany N, Fluchel M, Goyal G, Henry MM, Hermiston M, Hogarty M, Jeng M, Jubran R, Lubega J, Kumar A, Ladisch S, McClain KL, Merad M, Mi QS, Parsons DW, Peckham-Gregory E, Picarsic J, Prudowsky ZD, Rollins BJ, Shaw PH, Wistinghausen B, Rodriguez-Galindo C, Allen CE. Langerhans cell histiocytosis: NACHO update on progress, chaos, and opportunity on the path to rational cures. Cancer 2024; 130:2416-2439. [PMID: 38687639 PMCID: PMC11214602 DOI: 10.1002/cncr.35301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Revised: 02/14/2024] [Accepted: 02/27/2024] [Indexed: 05/02/2024]
Abstract
Langerhans cell histiocytosis (LCH) is a myeloid neoplastic disorder characterized by lesions with CD1a-positive/Langerin (CD207)-positive histiocytes and inflammatory infiltrate that can cause local tissue damage and systemic inflammation. Clinical presentations range from single lesions with minimal impact to life-threatening disseminated disease. Therapy for systemic LCH has been established through serial trials empirically testing different chemotherapy agents and durations of therapy. However, fewer than 50% of patients who have disseminated disease are cured with the current standard-of-care vinblastine/prednisone/(mercaptopurine), and treatment failure is associated with long-term morbidity, including the risk of LCH-associated neurodegeneration. Historically, the nature of LCH-whether a reactive condition versus a neoplastic/malignant condition-was uncertain. Over the past 15 years, seminal discoveries have broadly defined LCH pathogenesis; specifically, activating mitogen-activated protein kinase pathway mutations (most frequently, BRAFV600E) in myeloid precursors drive lesion formation. LCH therefore is a clonal neoplastic disorder, although secondary inflammatory features contribute to the disease. These paradigm-changing insights offer a promise of rational cures for patients based on individual mutations, clonal reservoirs, and extent of disease. However, the pace of clinical trial development behind lags the kinetics of translational discovery. In this review, the authors discuss the current understanding of LCH biology, clinical characteristics, therapeutic strategies, and opportunities to improve outcomes for every patient through coordinated agent prioritization and clinical trial efforts.
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Affiliation(s)
- Kevin Bielamowicz
- College of Medicine at the University of Arkansas for Medical Sciences, Department of Pediatrics; Arkansas Children’s Hospital, Pediatric Hematology and Oncology Little Rock, AR, USA
| | - Peter Dimitrion
- Center for Cutaneous Biology and Immunology, Henry Ford Health, Detroit, Michigan, USA
| | - Oussama Abla
- Division of Hematology/Oncology, Department of Pediatrics, Hospital for Sick Children, Toronto, Ontario, Canada
| | - Simon Bomken
- Translational and Clinical Research Institute, Newcastle University; Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, United Kingdom
| | - Patrick Campbell
- Department of Oncology, St. Jude Children’s Research Hospital, Memphis, TN, USA
| | - Matthew Collin
- Translational and Clinical Research Institute, Newcastle University; National Institute for Health and Care Research, Newcastle Biomedical Research Centre, Newcastle upon Tyne, United Kingdom
| | - Barbara Degar
- Department of Pediatric Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts, USA
| | - Eli Diamond
- Departments of Neurology and Medicine, Memorial Sloan Kettering Center, New York, NY, USA
| | - Olive S. Eckstein
- Department of Pediatrics, Baylor College of Medicine; Texas Children’s Cancer Center, Texas Children’s Hospital, Houston, TX, USA
| | - Nader El-Mallawany
- Department of Pediatrics, Baylor College of Medicine; Texas Children’s Cancer Center, Texas Children’s Hospital, Houston, TX, USA
| | - Mark Fluchel
- Department of Pediatrics, Division of Pediatric Hematology/Oncology, Seattle Children’s Hospital and University of Washington School of Medicine, Seattle, Washington, USA
| | - Gaurav Goyal
- Division of Hematology-Oncology, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Michael M. Henry
- Center for Cancer and Blood Disorders, Phoenix Children’s Hospital, Phoenix, AZ, USA
| | - Michelle Hermiston
- Department of Pediatrics, University of California, San Francisco, San Francisco, CA, USA
| | - Michael Hogarty
- Department of Pediatrics, Division of Hematology and Oncology, Children’s Hospital of Philadelphia (CHOP), Philadelphia, PA, USA
| | - Michael Jeng
- Department of Pediatrics, Pediatric Hematology/Oncology, Lucile Packard Children’s Hospital, Stanford University, Palo Alto, CA, USA
| | - Rima Jubran
- Division of Pediatric Hematology/Oncology, Children’s Hospital Los Angeles, Los Angeles, CA
| | - Joseph Lubega
- Department of Pediatrics, Baylor College of Medicine; Texas Children’s Cancer Center, Texas Children’s Hospital, Houston, TX, USA
| | - Ashish Kumar
- University of Cincinnati College of Medicine, Division of Bone Marrow Transplant and Immune Deficiency, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, USA
| | - Stephan Ladisch
- Marc and Jennifer Lipschultz Precision Immunology Institute; The Tisch Cancer Institute; Department of Oncology Sciences, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Kenneth L. McClain
- Department of Pediatrics, Baylor College of Medicine; Texas Children’s Cancer Center, Texas Children’s Hospital, Houston, TX, USA
| | - Miriam Merad
- Center for Cancer and Immunology Research, Children’s National Medical Center and George Washington University School of Medicine, Washington, DC, USA
| | - Qing-Sheng Mi
- Center for Cutaneous Biology and Immunology, Henry Ford Health, Detroit, Michigan, USA
| | - D. Williams Parsons
- Department of Pediatrics, Baylor College of Medicine; Texas Children’s Cancer Center, Texas Children’s Hospital, Houston, TX, USA
| | - Erin Peckham-Gregory
- Department of Pediatrics, Baylor College of Medicine; Texas Children’s Cancer Center, Texas Children’s Hospital, Houston, TX, USA
| | - Jennifer Picarsic
- University of Cincinnati College of Medicine and Division of Pathology, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, USA
| | - Zachary D. Prudowsky
- Department of Pediatrics, Baylor College of Medicine; Texas Children’s Cancer Center, Texas Children’s Hospital, Houston, TX, USA
| | - Barrett J. Rollins
- Department of Medical Oncology, Dana-Farber Cancer Institute and Department of Medicine, Brigham & Women’s Hospital, Harvard Medical School, Boston, MA, USA
| | - Peter H. Shaw
- Department of Pediatrics, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Birte Wistinghausen
- Marc and Jennifer Lipschultz Precision Immunology Institute; The Tisch Cancer Institute; Department of Oncology Sciences, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Carlos Rodriguez-Galindo
- Department of Global Pediatric Medicine and Department of Oncology, St. Jude Children’s Research Hospital, Memphis, TN, USA
| | - Carl E. Allen
- Department of Pediatrics, Baylor College of Medicine; Texas Children’s Cancer Center, Texas Children’s Hospital, Houston, TX, USA
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6
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Lin H, Cao XX. Current State of Targeted Therapy in Adult Langerhans Cell Histiocytosis and Erdheim-Chester Disease. Target Oncol 2024:10.1007/s11523-024-01080-x. [PMID: 38990463 DOI: 10.1007/s11523-024-01080-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/25/2024] [Indexed: 07/12/2024]
Abstract
The mitogen-activated protein kinase (MAPK) pathway is a key driver in many histiocytic disorders, including Langerhans cell histiocytosis (LCH) and Erdheim-Chester disease (ECD). This has led to successful and promising treatment with targeted therapies, including BRAF inhibitors and MEK inhibitors. Additional novel inhibitors have also demonstrated encouraging results. Nevertheless, there are several problems concerning targeted therapy that need to be addressed. These include, among others, incomplete responsiveness and the emergence of resistance to BRAF inhibition as observed in other BRAF-mutant malignancies. Drug resistance and relapse after treatment interruption remain problems with current targeted therapies. Targeted therapy does not seem to eradicate the mutated clone, leading to inevitable relapes, which is a huge challenge for the future. More fundamental research and clinical trials are needed to address these issues and to develop improved targeted therapies that can overcome resistance and achieve long-lasting remissions.
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Affiliation(s)
- He Lin
- Department of Hematology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
- State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Beijing, China
| | - Xin-Xin Cao
- Department of Hematology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.
- State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Beijing, China.
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7
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Mozzarelli AM, Simanshu DK, Castel P. Functional and structural insights into RAS effector proteins. Mol Cell 2024:S1097-2765(24)00534-3. [PMID: 39025071 DOI: 10.1016/j.molcel.2024.06.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2024] [Revised: 06/24/2024] [Accepted: 06/25/2024] [Indexed: 07/20/2024]
Abstract
RAS proteins are conserved guanosine triphosphate (GTP) hydrolases (GTPases) that act as molecular binary switches and play vital roles in numerous cellular processes. Upon GTP binding, RAS GTPases adopt an active conformation and interact with specific proteins termed RAS effectors that contain a conserved ubiquitin-like domain, thereby facilitating downstream signaling. Over 50 effector proteins have been identified in the human proteome, and many have been studied as potential mediators of RAS-dependent signaling pathways. Biochemical and structural analyses have provided mechanistic insights into these effectors, and studies using model organisms have complemented our understanding of their role in physiology and disease. Yet, many critical aspects regarding the dynamics and biological function of RAS-effector complexes remain to be elucidated. In this review, we discuss the mechanisms and functions of known RAS effector proteins, provide structural perspectives on RAS-effector interactions, evaluate their significance in RAS-mediated signaling, and explore their potential as therapeutic targets.
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Affiliation(s)
- Alessandro M Mozzarelli
- Department of Biochemistry and Molecular Pharmacology, NYU Grossman School of Medicine, New York, NY, USA; Laura and Isaac Perlmutter NYU Cancer Center, NYU Langone Health, New York, NY, USA
| | - Dhirendra K Simanshu
- NCI RAS Initiative, Cancer Research Technology Program, Frederick National Laboratory for Cancer Research, Frederick, MD, USA.
| | - Pau Castel
- Department of Biochemistry and Molecular Pharmacology, NYU Grossman School of Medicine, New York, NY, USA; Laura and Isaac Perlmutter NYU Cancer Center, NYU Langone Health, New York, NY, USA.
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8
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Ryan MB, Quade B, Schenk N, Fang Z, Zingg M, Cohen SE, Swalm BM, Li C, Özen A, Ye C, Ritorto MS, Huang X, Dar AC, Han Y, Hoeflich KP, Hale M, Hagel M. The Pan-RAF-MEK Nondegrading Molecular Glue NST-628 Is a Potent and Brain-Penetrant Inhibitor of the RAS-MAPK Pathway with Activity across Diverse RAS- and RAF-Driven Cancers. Cancer Discov 2024; 14:1190-1205. [PMID: 38588399 PMCID: PMC11215411 DOI: 10.1158/2159-8290.cd-24-0139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Revised: 03/15/2024] [Accepted: 03/21/2024] [Indexed: 04/10/2024]
Abstract
Alterations in the RAS-MAPK signaling cascade are common across multiple solid tumor types and are a driver for many cancers. NST-628 is a potent pan-RAF-MEK molecular glue that prevents the phosphorylation and activation of MEK by RAF, overcoming the limitations of traditional RAS-MAPK inhibitors and leading to deep durable inhibition of the pathway. Cellular, biochemical, and structural analyses of RAF-MEK complexes show that NST-628 engages all isoforms of RAF and prevents the formation of BRAF-CRAF heterodimers, a differentiated mechanism from all current RAF inhibitors. With a potent and durable inhibition of the RAF-MEK signaling complex as well as high intrinsic permeability into the brain, NST-628 demonstrates broad efficacy in cellular and patient-derived tumor models harboring diverse MAPK pathway alterations, including orthotopic intracranial models. Given its functional and pharmacokinetic mechanisms that are differentiated from previous therapies, NST-628 is positioned to make an impact clinically in areas of unmet patient need. Significance: This study introduces NST-628, a molecular glue having differentiated mechanism and drug-like properties. NST-628 treatment leads to broad efficacy with high tolerability and central nervous system activity across multiple RAS- and RAF-driven tumor models. NST-628 has the potential to provide transformative clinical benefits as both monotherapy and vertical combination anchor.
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Affiliation(s)
| | | | | | - Zhong Fang
- Nested Therapeutics, Cambridge, Massachusetts.
| | | | | | | | - Chun Li
- Nested Therapeutics, Cambridge, Massachusetts.
| | | | - Chaoyang Ye
- Nested Therapeutics, Cambridge, Massachusetts.
| | | | - Xin Huang
- Nested Therapeutics, Cambridge, Massachusetts.
| | - Arvin C. Dar
- Program in Chemical Biology, Sloan Kettering Institute, Memorial Sloan Kettering Cancer Center, New York, New York.
| | - Yongxin Han
- Nested Therapeutics, Cambridge, Massachusetts.
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9
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Baik C, Cheng ML, Dietrich M, Gray JE, Karim NA. A Practical Review of Encorafenib and Binimetinib Therapy Management in Patients with BRAF V600E-Mutant Metastatic Non-Small Cell Lung Cancer. Adv Ther 2024; 41:2586-2605. [PMID: 38698170 PMCID: PMC11213720 DOI: 10.1007/s12325-024-02839-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2024] [Accepted: 03/08/2024] [Indexed: 05/05/2024]
Abstract
According to current guidelines, targeted therapy with a combination of BRAF plus MEK inhibitors is the preferred first-line treatment for patients with BRAF V600E-mutant metastatic non-small cell lung cancer (NSCLC). In the open-label, single-arm, phase 2 PHAROS trial (NCT03915951), the combination of encorafenib, a potent BRAF inhibitor, and binimetinib, a potent MEK inhibitor, demonstrated durable antitumor activity with a manageable safety profile in this patient population. On the basis of the results of this study, the combination of encorafenib plus binimetinib was approved by the US Food and Drug Administration on October 11, 2023, for patients with BRAF V600E-mutant metastatic NSCLC. In this review, we summarize the efficacy and safety of encorafenib plus binimetinib from the PHAROS study. In addition, we discuss strategies to manage adverse reactions with this combination therapy with the intent of minimizing unnecessary treatment discontinuations in these patients.
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Affiliation(s)
- Christina Baik
- University of Washington, Seattle, WA, USA
- Fred Hutchinson Cancer Center, Seattle, WA, USA
| | - Michael L Cheng
- University of California, San Francisco, San Francisco, CA, USA
| | - Martin Dietrich
- US Oncology and University of Central Florida, Orlando, FL, USA
| | - Jhanelle E Gray
- H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, USA
| | - Nagla A Karim
- Inova Schar Cancer Institute, University of Virginia, 8081 Innovation Park Drive, Fairfax, VA, 22031, USA.
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10
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Perrone C, Angioli R, Luvero D, Giannini A, Di Donato V, Cuccu I, Muzii L, Raspagliesi F, Bogani G. Targeting BRAF pathway in low-grade serous ovarian cancer. J Gynecol Oncol 2024; 35:e104. [PMID: 38768941 PMCID: PMC11262891 DOI: 10.3802/jgo.2024.35.e104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2024] [Revised: 04/14/2024] [Accepted: 05/07/2024] [Indexed: 05/22/2024] Open
Abstract
Mutations in genes encoding for proteins along the RAS-RAF-MEK-ERK pathway have been detected in a variety of tumor entities including ovarian carcinomas. In the recent years, several inhibitors of this pathway have been developed, whose antitumor potential is currently being assessed in different clinical trials. Low grade serous ovarian carcinoma, is a rare gynecological tumor which shows favorable overall survival, compared to the general ovarian cancer population, but worrying resistance to conventional chemotherapies. The clinical behavior of low grade serous ovarian carcinoma reflects the different gene profile compared to high-grade serous carcinoma: KRAS/BRAF mutations. BRAF inhibitors as single agents were approved for the treatment of BRAF mutated tumors. Nevertheless, many patients face progressive disease. The understanding of the mechanisms of resistance to BRAF inhibitors therapy and preclinical studies showing that BRAF and mitogen-activated protein kinase kinase (MEK) inhibitors combined therapy delays the onset of resistance compared to BRAF inhibitor single agent, led to the clinical investigation of combined therapy. The aim of this paper is to review the efficacy and safety of the combination of BRAF plus MEK inhibitors on ovarian carcinomas, in particularly focusing on low grade serous ovarian carcinoma.
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Affiliation(s)
- Chiara Perrone
- Department of Gynecological, Obstetrical and Urological Sciences, Sapienza University of Rome, Rome, Italy
| | - Roberto Angioli
- Department of Gynecology, Campus Bio-Medico University Hospital Foundation, Rome, Italy
| | - Daniela Luvero
- Department of Gynecology, Campus Bio-Medico University Hospital Foundation, Rome, Italy
| | - Andrea Giannini
- Department of Gynecological, Obstetrical and Urological Sciences, Sapienza University of Rome, Rome, Italy
| | - Violante Di Donato
- Department of Gynecological, Obstetrical and Urological Sciences, Sapienza University of Rome, Rome, Italy
| | - Ilaria Cuccu
- Department of Gynecological, Obstetrical and Urological Sciences, Sapienza University of Rome, Rome, Italy
| | - Ludovico Muzii
- Department of Gynecological, Obstetrical and Urological Sciences, Sapienza University of Rome, Rome, Italy
| | - Francesco Raspagliesi
- Gynecologic Oncologic Unit, Fondazione IRCCS Istituto Nazionale dei Tumori, Milano, Italy
| | - Giorgio Bogani
- Gynecologic Oncologic Unit, Fondazione IRCCS Istituto Nazionale dei Tumori, Milano, Italy.
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11
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Scotece M, Drosten M. A new BRAF inhibitor breaks resistance barriers. Trends Cancer 2024; 10:576-578. [PMID: 38866669 DOI: 10.1016/j.trecan.2024.05.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2024] [Revised: 05/29/2024] [Accepted: 05/30/2024] [Indexed: 06/14/2024]
Abstract
Approved BRAF inhibitors have shown limited clinical benefit due to recurrent disease progression. In a recent Cancer Discovery paper, Yaeger et al. show that a next-generation BRAF inhibitor, PF-07799933, has widespread therapeutic activity in experimental models and patients who were refractory to treatment with approved BRAF inhibitors.
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Affiliation(s)
- Morena Scotece
- Molecular Mechanisms of Cancer Program, Centro de Investigación del Cáncer (CIC), Salamanca, Spain; Instituto de Biología Molecular y Celular del Cáncer (IBMCC), CSIC-USAL, Salamanca, Spain
| | - Matthias Drosten
- Molecular Mechanisms of Cancer Program, Centro de Investigación del Cáncer (CIC), Salamanca, Spain; Instituto de Biología Molecular y Celular del Cáncer (IBMCC), CSIC-USAL, Salamanca, Spain.
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12
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Takada M, Kitagawa K, Zhang Y, Bulitta JB, Moirano S, Jones A, Borgen J, Onsager A, Thaiwong T, Vail DM. Population Pharmacokinetics, Pharmacodynamics and Safety Properties of Trametinib in Dogs With Cancer: A Phase I Dose Escalating Clinical Trial. Vet Comp Oncol 2024. [PMID: 38889903 DOI: 10.1111/vco.12989] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2024] [Revised: 05/20/2024] [Accepted: 05/22/2024] [Indexed: 06/20/2024]
Abstract
MAPK has been reported as a key oncogenic pathway for canine histiocytic sarcoma, which can be pharmacologically targeted with trametinib, a small inhibitor of MEK1/2. Preliminary data showed promising antitumor activity in in vitro and in vivo models and represented a proof of concept to translate the findings from bench to bedside. In this phase I, dose escalating study using a 3 + 3 cohort design, trametinib was evaluated in 18 dogs with cancer. Adverse events were graded according to VCOG-CTCAE v2. Blood samples and tumour biopsies were collected for pharmacokinetic and pharmacodynamic assessment. Trametinib was well tolerated with a maximum tolerated dose of 0.5 mg/m2/day, PO. Dose-limiting toxicities included systemic hypertension, proteinuria, lethargy and elevated ALP, and were all Grade 3. The drug exposures increased more than linearly with dose since the elimination of trametinib was saturable. At a dose of 500 μg Q24h (0.5 mg/m2/day in a 30 kg dog), approximately 70% of dogs had an average steady-state concentration of 10 ng/mL, achieved after approximately 2 weeks. This threshold was associated with clinical efficacy in humans. Target engagement was not observed in biospecimens collected on Days 0 and 7. In conclusion, trametinib was considered safe in dogs with cancer, and the dose of 0.5 mg/m2/day was the recommended dose for phase II studies.
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Affiliation(s)
- Marilia Takada
- Department of Surgical Sciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, Wisconsin, USA
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, Florida, USA
| | - Keita Kitagawa
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, Florida, USA
| | - Yongzhen Zhang
- Department of Pharmacotherapy and Translational Research, College of Pharmacy, University of Florida, Gainesville, Florida, USA
| | - Jürgen B Bulitta
- Department of Pharmacotherapy and Translational Research, College of Pharmacy, University of Florida, Gainesville, Florida, USA
| | - Steven Moirano
- Department of Surgical Sciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Abigail Jones
- Department of Surgical Sciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Jennifer Borgen
- Department of Surgical Sciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Ashley Onsager
- Department of Surgical Sciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Tuddow Thaiwong
- Veterinary Diagnostic Laboratory, Michigan State University, Lansing, Michigan, USA
| | - David M Vail
- Department of Medical Sciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, Wisconsin, USA
- Carbone Comprehensive Cancer Center, University of Wisconsin-Madison, Madison, Wisconsin, USA
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13
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Wang M, Sullivan RJ, Mooradian MJ. Toxicities from BRAF and MEK Inhibitors: Strategies to Maximize Therapeutic Success. Curr Oncol Rep 2024:10.1007/s11912-024-01544-3. [PMID: 38850505 DOI: 10.1007/s11912-024-01544-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/03/2024] [Indexed: 06/10/2024]
Abstract
PURPOSE OF REVIEW This report highlights several of the recent therapeutic advancements in the treatment of BRAF-mutant tumors, discusses the most common adverse events observed with BRAF-targeted agents, and suggests strategies to manage and mitigate treatment-related toxicities. RECENT FINDINGS BRAF and MEK inhibitors represent a significant advancement in the treatment of BRAF-mutated malignancies with data across tumor types demonstrating the anti-tumor efficacy of dual MAPK inhibition. Although these agents have a reasonable toxicity profile, variable side effects across organ systems can develop. The discovery of activating BRAF mutations and subsequent development of BRAF and MEK inhibitors has transformed the treatment algorithms of BRAF-mutant malignancies. With increased application of these targeted regimens, identification and prompt management of their unique adverse events are crucial.
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Affiliation(s)
- Mike Wang
- Division of Medical Oncology, Massachusetts General Hospital, Boston, MA, USA
- Harvard Medical School, Boston, MA, USA
- Department of Medical Oncology, Dana Farber Cancer Institute, Boston, MA, USA
| | - Ryan J Sullivan
- Division of Medical Oncology, Massachusetts General Hospital, Boston, MA, USA
- Harvard Medical School, Boston, MA, USA
| | - Meghan J Mooradian
- Division of Medical Oncology, Massachusetts General Hospital, Boston, MA, USA.
- Harvard Medical School, Boston, MA, USA.
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14
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Chen Y, Yu J, Ge S, Jia R, Song X, Wang Y, Fan X. An Overview of Optic Pathway Glioma With Neurofibromatosis Type 1: Pathogenesis, Risk Factors, and Therapeutic Strategies. Invest Ophthalmol Vis Sci 2024; 65:8. [PMID: 38837168 PMCID: PMC11160950 DOI: 10.1167/iovs.65.6.8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2024] [Accepted: 05/14/2024] [Indexed: 06/06/2024] Open
Abstract
Optic pathway gliomas (OPGs) are most predominant pilocytic astrocytomas, which are typically diagnosed within the first decade of life. The majority of affected children with OPGs also present with neurofibromatosis type 1 (NF1), the most common tumor predisposition syndrome. OPGs in individuals with NF1 primarily affect the optic pathway and lead to visual disturbance. However, it is challenging to assess risk in asymptomatic patients without valid biomarkers. On the other hand, for symptomatic patients, there is still no effective treatment to prevent or recover vision loss. Therefore, this review summarizes current knowledge regarding the pathogenesis of NF1-associated OPGs (NF1-OPGs) from preclinical studies to seek potential prognostic markers and therapeutic targets. First, the loss of the NF1 gene activates 3 distinct Ras effector pathways, including the PI3K/AKT/mTOR pathway, the MEK/ERK pathway, and the cAMP pathway, which mediate glioma tumorigenesis. Meanwhile, non-neoplastic cells from the tumor microenvironment (microglia, T cells, neurons, etc.) also contribute to gliomagenesis via various soluble factors. Subsequently, we investigated potential genetic risk factors, molecularly targeted therapies, and neuroprotective strategies for tumor prevention and vision recovery. Last, potential directions and promising preclinical models of NF1-OPGs are presented for further research. On the whole, NF1-OPGs develop as a result of the interaction between glioma cells and the tumor microenvironment. Developing effective treatments require a better understanding of tumor molecular characteristics, as well as multistage interventions targeting both neoplastic cells and non-neoplastic cells.
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Affiliation(s)
- Ying Chen
- Department of Ophthalmology, Shanghai Key Laboratory of Orbital Diseases and Ocular Oncology, Ninth People's Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, P.R. China
| | - Jie Yu
- Department of Ophthalmology, Shanghai Key Laboratory of Orbital Diseases and Ocular Oncology, Ninth People's Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, P.R. China
| | - Shengfang Ge
- Department of Ophthalmology, Shanghai Key Laboratory of Orbital Diseases and Ocular Oncology, Ninth People's Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, P.R. China
| | - Renbing Jia
- Department of Ophthalmology, Shanghai Key Laboratory of Orbital Diseases and Ocular Oncology, Ninth People's Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, P.R. China
| | - Xin Song
- Department of Ophthalmology, Shanghai Key Laboratory of Orbital Diseases and Ocular Oncology, Ninth People's Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, P.R. China
| | - Yefei Wang
- Department of Ophthalmology, Shanghai Key Laboratory of Orbital Diseases and Ocular Oncology, Ninth People's Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, P.R. China
| | - Xianqun Fan
- Department of Ophthalmology, Shanghai Key Laboratory of Orbital Diseases and Ocular Oncology, Ninth People's Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, P.R. China
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15
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Zhang Z, Xu S, Song M, Huang W, Yan M, Li X. Association between blood lipid levels and the risk of liver cancer: a systematic review and meta-analysis. Cancer Causes Control 2024; 35:943-953. [PMID: 38376693 PMCID: PMC11129988 DOI: 10.1007/s10552-024-01853-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Accepted: 01/15/2024] [Indexed: 02/21/2024]
Abstract
PURPOSE The association between blood lipid levels and the risk of developing liver cancer remains a subject of ongoing debate. To elucidate this association, we conducted a meta-analysis by systematically incorporating data from all relevant prospective cohort studies. METHODS We conducted a systematic search of the PubMed, Embase, Web of Science, and Cochrane Library databases covering studies published from database inception through July 2023. This study included prospective cohort studies related to lipid profiles (e.g., total cholesterol (TC), triglyceride (TG), high-density lipoprotein cholesterol (HDL-C), and low-density lipoprotein cholesterol (LDL-C) levels) that reported hazard ratios (HRs) or relative risks (RRs) with corresponding 95% confidence intervals (95% CIs) to investigate their association with the risk of liver cancer. During the analysis process, we used fixed-effects or random-effects models based on the level of heterogeneity among the studies and obtained pooled risk ratios using these models. To ensure the robustness and reliability of the study findings, we also conducted sensitivity analyses and publication bias analyses. RESULTS After conducting a systematic search, 12 studies were identified from a total of 11,904 articles and were included in the meta-analysis. These studies included a combined population of 10,765,221 participants, among whom 31,055 cases of liver cancer were reported. The analysis revealed that the pooled HR for the serum TC concentration (highest versus lowest) was 0.45 (95% CI = 0.35-0.58, I2 = 78%). For TGs, the HR was 0.67 (95% CI = 0.46-0.96, I2 = 86%), while for HDL-C, the HR was 0.72 (95% CI = 0.58-0.90, I2 = 65%). The HR for LDL-C was 0.51 (95% CI = 0.23-1.13, I2 = 93%). CONCLUSION The findings of this study indicate that serum TC, TG, and HDL-C levels are negatively associated with liver cancer risk, suggesting that higher concentrations of these lipids are associated with a reduced risk of liver cancer. However, no significant association has been found between LDL-C levels and liver cancer risk.
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Affiliation(s)
- Zhihui Zhang
- School of Nursing, Southwest Medical University, Luzhou, 646000, China
- Department of Gastrointestinal surgery, The Affiliated Hospital, Southwest Medical University, Luzhou, 646000, China
| | - Shicong Xu
- School of Nursing, Southwest Medical University, Luzhou, 646000, China
- Department of Gastrointestinal surgery, The Affiliated Hospital, Southwest Medical University, Luzhou, 646000, China
| | - Meixuan Song
- School of Nursing, Southwest Medical University, Luzhou, 646000, China
| | - Weirong Huang
- School of Nursing, Southwest Medical University, Luzhou, 646000, China
- Department of Gastrointestinal surgery, The Affiliated Hospital, Southwest Medical University, Luzhou, 646000, China
| | - Manlin Yan
- School of Nursing, Southwest Medical University, Luzhou, 646000, China
- Department of Gastrointestinal surgery, The Affiliated Hospital, Southwest Medical University, Luzhou, 646000, China
| | - Xianrong Li
- Department of Gastrointestinal surgery, The Affiliated Hospital, Southwest Medical University, Luzhou, 646000, China.
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16
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Katz S, Ciuba D, Ribas A, Shelach N, Zelinger G, Barrow B, Corn BW. A topical BRAF inhibitor (LUT-014) for treatment of radiodermatitis among women with breast cancer. JAAD Int 2024; 15:62-68. [PMID: 38405632 PMCID: PMC10891318 DOI: 10.1016/j.jdin.2023.11.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/22/2023] [Indexed: 02/27/2024] Open
Abstract
Background Modern radiotherapy is associated with dermatitis (RD) in approximately one-third of patients treated for breast cancer. There is currently no standard for treating RD. Objective The objective of this study was to determine whether LUT014, a topical BRAF inhibitor which paradoxically activates mitogen-activated protein kinase, can safely improve RD. Methods A phase I/II study was designed to first follow a small cohort of women with grade 2 RD regarding toxicity and response. Then, 20 patients were randomized to compare LUT014 to "vehicle" relative to safety and response (measured with common terminology criteria for adverse events, Dermatology Life Quality Index). Results No substantial toxicity (eg, 0 serious adverse event) was associated with LUT014. All 8 women receiving LUT014 achieved treatment success (5-point Dermatology Life Quality Index reduction at day 14) compared to 73% (8/11) on the placebo arm (P = .591). The time to complete recovery was shorter in the treatment arm. Limitations The sample size was limited. Only 2 hospitals were included. Conclusions Topical LU014 is tolerable and may be efficacious for grade 2 RD.
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Affiliation(s)
- Sanford Katz
- Division of Radiotherapy, Willis-Knighton Cancer Center, Shreveport, Louisiana
| | - Doug Ciuba
- Radiation Oncology of Columbus, Columbus, Georgia
| | - Antoni Ribas
- Department of Medical Oncology, University of California Los Angeles (UCAL) and Jonsson Comprehensive Cancer Center, Los Angeles, California
| | | | - Galit Zelinger
- Department of Medical Oncology, University of California Los Angeles (UCAL) and Jonsson Comprehensive Cancer Center, Los Angeles, California
| | - Briana Barrow
- Division of Radiotherapy, Willis-Knighton Cancer Center, Shreveport, Louisiana
| | - Benjamin W. Corn
- Lutris-Pharma, Tel Aviv, Israel
- Department of Oncology, Hebrew University Faculty of Medicine, Jerusalem, Israel
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17
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Scardaci R, Berlinska E, Scaparone P, Vietti Michelina S, Garbo E, Novello S, Santamaria D, Ambrogio C. Novel RAF-directed approaches to overcome current clinical limits and block the RAS/RAF node. Mol Oncol 2024; 18:1355-1377. [PMID: 38362705 PMCID: PMC11161739 DOI: 10.1002/1878-0261.13605] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 11/30/2023] [Accepted: 01/30/2024] [Indexed: 02/17/2024] Open
Abstract
Mutations in the RAS-RAF-MEK-ERK pathway are frequent alterations in cancer and RASopathies, and while RAS oncogene activation alone affects 19% of all patients and accounts for approximately 3.4 million new cases every year, less frequent alterations in the cascade's downstream effectors are also involved in cancer etiology. RAS proteins initiate the signaling cascade by promoting the dimerization of RAF kinases, which can act as oncoproteins as well: BRAFV600E is the most common oncogenic driver, mutated in the 8% of all malignancies. Research in this field led to the development of drugs that target the BRAFV600-like mutations (Class I), which are now utilized in clinics, but cause paradoxical activation of the pathway and resistance development. Furthermore, they are ineffective against non-BRAFV600E malignancies that dimerize and could be either RTK/RAS independent or dependent (Class II and III, respectively), which are still lacking an effective treatment. This review discusses the recent advances in anti-RAF therapies, including paradox breakers, dimer-inhibitors, immunotherapies, and other novel approaches, critically evaluating their efficacy in overcoming the therapeutic limitations, and their putative role in blocking the RAS pathway.
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Affiliation(s)
- Rossella Scardaci
- Department of Molecular Biotechnology and Health Sciences, Molecular Biotechnology CenterUniversity of TorinoItaly
| | - Ewa Berlinska
- Department of Molecular Biotechnology and Health Sciences, Molecular Biotechnology CenterUniversity of TorinoItaly
| | - Pietro Scaparone
- Department of Molecular Biotechnology and Health Sciences, Molecular Biotechnology CenterUniversity of TorinoItaly
| | - Sandra Vietti Michelina
- Department of Molecular Biotechnology and Health Sciences, Molecular Biotechnology CenterUniversity of TorinoItaly
| | - Edoardo Garbo
- Department of OncologyUniversity of Torino, San Luigi HospitalOrbassanoItaly
| | - Silvia Novello
- Department of OncologyUniversity of Torino, San Luigi HospitalOrbassanoItaly
| | - David Santamaria
- Centro de Investigación del CáncerCSIC‐Universidad de SalamancaSpain
| | - Chiara Ambrogio
- Department of Molecular Biotechnology and Health Sciences, Molecular Biotechnology CenterUniversity of TorinoItaly
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18
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Starace M, Rapparini L, Cedirian S. Skin Malignancies Due to Anti-Cancer Therapies. Cancers (Basel) 2024; 16:1960. [PMID: 38893081 PMCID: PMC11171349 DOI: 10.3390/cancers16111960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2024] [Revised: 05/19/2024] [Accepted: 05/20/2024] [Indexed: 06/21/2024] Open
Abstract
Skin cancers involve a significant concern in cancer therapy due to their association with various treatment modalities. This comprehensive review explores the increased risk of skin cancers linked to different anti-cancer treatments, including classic immunosuppressants such as methotrexate (MTX), chemotherapeutic agents such as fludarabine and hydroxyurea (HU), targeted therapies like ibrutinib and Janus Kinase inhibitors (JAKi), mitogen-activated protein kinase pathway (MAPKP) inhibitors, sonic hedgehog pathway (SHHP) inhibitors, and radiotherapy. MTX, a widely used immunosuppressant in different fields, is associated with basal cell carcinoma (BCC), cutaneous squamous cell carcinoma (cSCC), and cutaneous melanoma (CM), particularly at higher dosages. Fludarabine, HU, and other chemotherapeutic agents increase the risk of non-melanoma skin cancers (NMSCs), including cSCC and BCC. Targeted therapies like ibrutinib and JAKi have been linked to an elevated incidence of NMSCs and CM. MAPKP inhibitors, particularly BRAF inhibitors like vemurafenib, are associated with the development of cSCCs and second primary melanomas (SPMs). SHHP inhibitors like vismodegib have been linked to the emergence of cSCCs following treatment for BCC. Additionally, radiotherapy carries carcinogenic risks, especially for BCCs, with increased risks, especially with younger age at the moment of exposure. Understanding these risks and implementing appropriate screening is crucial for effectively managing patients undergoing anti-cancer therapies.
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Affiliation(s)
- Michela Starace
- Dermatology Unit, IRCCS Azienda Ospedaliero-Universitaria di Bologna, 40138 Bologna, Italy; (M.S.); (S.C.)
- Department of Medical and Surgical Sciences, Alma Mater Studiorum University of Bologna, 40138 Bologna, Italy
| | - Luca Rapparini
- Dermatology Unit, IRCCS Azienda Ospedaliero-Universitaria di Bologna, 40138 Bologna, Italy; (M.S.); (S.C.)
- Department of Medical and Surgical Sciences, Alma Mater Studiorum University of Bologna, 40138 Bologna, Italy
| | - Stephano Cedirian
- Dermatology Unit, IRCCS Azienda Ospedaliero-Universitaria di Bologna, 40138 Bologna, Italy; (M.S.); (S.C.)
- Department of Medical and Surgical Sciences, Alma Mater Studiorum University of Bologna, 40138 Bologna, Italy
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19
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Rasmussen DM, Semonis MM, Greene JT, Muretta JM, Thompson AR, Toledo Ramos S, Thomas DD, Pomerantz WCK, Freedman TS, Levinson NM. Allosteric coupling asymmetry mediates paradoxical activation of BRAF by type II inhibitors. eLife 2024; 13:RP95481. [PMID: 38742856 PMCID: PMC11093583 DOI: 10.7554/elife.95481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2024] Open
Abstract
The type II class of RAF inhibitors currently in clinical trials paradoxically activate BRAF at subsaturating concentrations. Activation is mediated by induction of BRAF dimers, but why activation rather than inhibition occurs remains unclear. Using biophysical methods tracking BRAF dimerization and conformation, we built an allosteric model of inhibitor-induced dimerization that resolves the allosteric contributions of inhibitor binding to the two active sites of the dimer, revealing key differences between type I and type II RAF inhibitors. For type II inhibitors the allosteric coupling between inhibitor binding and BRAF dimerization is distributed asymmetrically across the two dimer binding sites, with binding to the first site dominating the allostery. This asymmetry results in efficient and selective induction of dimers with one inhibited and one catalytically active subunit. Our allosteric models quantitatively account for paradoxical activation data measured for 11 RAF inhibitors. Unlike type II inhibitors, type I inhibitors lack allosteric asymmetry and do not activate BRAF homodimers. Finally, NMR data reveal that BRAF homodimers are dynamically asymmetric with only one of the subunits locked in the active αC-in state. This provides a structural mechanism for how binding of only a single αC-in inhibitor molecule can induce potent BRAF dimerization and activation.
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Affiliation(s)
- Damien M Rasmussen
- Department of Pharmacology, University of MinnesotaMinneapolisUnited States
- Department of Biochemistry, Molecular Biology, and Biophysics, University of MinnesotaMinneapolisUnited States
| | - Manny M Semonis
- Department of Pharmacology, University of MinnesotaMinneapolisUnited States
| | - Joseph T Greene
- Department of Pharmacology, University of MinnesotaMinneapolisUnited States
| | - Joseph M Muretta
- Department of Biochemistry, Molecular Biology, and Biophysics, University of MinnesotaMinneapolisUnited States
| | - Andrew R Thompson
- Department of Biochemistry, Molecular Biology, and Biophysics, University of MinnesotaMinneapolisUnited States
| | | | - David D Thomas
- Department of Biochemistry, Molecular Biology, and Biophysics, University of MinnesotaMinneapolisUnited States
| | | | - Tanya S Freedman
- Department of Pharmacology, University of MinnesotaMinneapolisUnited States
- Center for Immunology, University of MinnesotaMinneapolisUnited States
- Masonic Cancer Center, University of MinnesotaMinneapolisUnited States
| | - Nicholas M Levinson
- Department of Pharmacology, University of MinnesotaMinneapolisUnited States
- Masonic Cancer Center, University of MinnesotaMinneapolisUnited States
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20
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Ichikawa K, Ohno S, Kubo S, Nakajima H. Large-vessel vasculitis possibly induced by BRAF and MEK inhibitors for BRAF V600E positive lung adenocarcinoma. BMJ Case Rep 2024; 17:e255958. [PMID: 38719253 PMCID: PMC11085983 DOI: 10.1136/bcr-2023-255958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/13/2024] Open
Abstract
The combination therapy of v-Raf murine sarcoma viral oncogene homolog B1 (BRAF) and mitogen-activated protein kinase kinase (MEK) inhibitors is approved for treating patients with BRAF V600E-positive tumours, including melanoma and lung cancer. Several case reports indicated autoimmune side effects associated with the use of BRAF and MEK inhibitors. Still, the effects of these drugs on the immune system were not fully elucidated. Here, we report a patient with large-vessel vasculitis diagnosed after initiation of treatment with dabrafenib and trametinib for BRAF V600E-positive metastatic lung adenocarcinoma. She was a never-smoker woman in her early 70s who presented with a chronic cough and was diagnosed with BRAF V600E-positive metastatic lung adenocarcinoma by transbronchial lung biopsy. She was successfully treated with prednisolone and methotrexate while BRAF and MEK inhibitors were continued. We should be careful about autoimmune diseases using BRAF and MEK inhibitors.
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Affiliation(s)
- Kento Ichikawa
- Center for Rheumatic Diseases, Yokohama City University Medical Center, Yokohama, Japan
| | - Shigeru Ohno
- Center for Rheumatic Diseases, Yokohama City University Medical Center, Yokohama, Japan
| | - Sousuke Kubo
- Respiratory Disease Center, Yokohama City University Medical Center, Yokohama, Kanagawa, Japan
| | - Hideaki Nakajima
- Department of Stem Cell and Immune Regulation, Yokohama City University School of Medicine Graduate School of Medicine, Yokohama, Kanagawa, Japan
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21
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Simpson CL, Tiwaa A, Zaver SA, Johnson CJ, Chu EY, Harms PW, Gudjonsson JE. ERK hyperactivation in epidermal keratinocytes impairs intercellular adhesion and drives Grover disease pathology. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.04.30.591953. [PMID: 38746263 PMCID: PMC11092613 DOI: 10.1101/2024.04.30.591953] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2024]
Abstract
Grover disease is an acquired dermatologic disorder characterized by pruritic vesicular and eroded skin lesions. While its pathologic features are well-defined, including impaired cohesion of epidermal keratinocytes, the etiology of Grover disease remains unclear and it lacks any FDA-approved therapy. Interestingly, drug-induced Grover disease occurs in patients treated with B-RAF inhibitors that can paradoxically activate C-RAF and the downstream kinase MEK. We recently identified hyperactivation of MEK and ERK as key drivers of Darier disease, which is histologically identical to Grover disease, supporting our hypothesis that they share a pathogenic mechanism. To model drug-induced Grover disease, we treated human keratinocytes with clinically utilized B-RAF inhibitors dabrafenib or vemurafenib and leveraged a fluorescent biosensor to confirm they activated ERK, which disrupted intercellular junctions and compromised keratinocyte sheet integrity. Consistent with clinical data showing concomitant MEK blockade prevents Grover disease in patients receiving B-RAF inhibitors, we found that MEK inhibition suppressed excess ERK activity to rescue cohesion of B-RAF-inhibited keratinocytes. Validating these results, we demonstrated ERK hyperactivation in skin biopsies of vemurafenib-induced Grover disease, but also in spontaneous Grover disease. In sum, our data define a pathogenic role for ERK hyperactivation in Grover disease and support MEK inhibition as a therapeutic strategy. GRAPHICAL ABSTRACT
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22
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Yin H, Tang Q, Xia H, Bi F. Targeting RAF dimers in RAS mutant tumors: From biology to clinic. Acta Pharm Sin B 2024; 14:1895-1923. [PMID: 38799634 PMCID: PMC11120325 DOI: 10.1016/j.apsb.2024.02.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Revised: 01/02/2024] [Accepted: 02/20/2024] [Indexed: 05/29/2024] Open
Abstract
RAS mutations occur in approximately 30% of tumors worldwide and have a poor prognosis due to limited therapies. Covalent targeting of KRAS G12C has achieved significant success in recent years, but there is still a lack of efficient therapeutic approaches for tumors with non-G12C KRAS mutations. A highly promising approach is to target the MAPK pathway downstream of RAS, with a particular focus on RAF kinases. First-generation RAF inhibitors have been authorized to treat BRAF mutant tumors for over a decade. However, their use in RAS-mutated tumors is not recommended due to the paradoxical ERK activation mainly caused by RAF dimerization. To address the issue of RAF dimerization, type II RAF inhibitors have emerged as leading candidates. Recent clinical studies have shown the initial effectiveness of these agents against RAS mutant tumors. Promisingly, type II RAF inhibitors in combination with MEK or ERK inhibitors have demonstrated impressive efficacy in RAS mutant tumors. This review aims to clarify the importance of RAF dimerization in cellular signaling and resistance to treatment in tumors with RAS mutations, as well as recent progress in therapeutic approaches to address the problem of RAF dimerization in RAS mutant tumors.
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Affiliation(s)
- Huanhuan Yin
- Division of Abdominal Cancer, Department of Medical Oncology, Cancer Center and Laboratory of Molecular Targeted Therapy in Oncology, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Qiulin Tang
- Division of Abdominal Cancer, Department of Medical Oncology, Cancer Center and Laboratory of Molecular Targeted Therapy in Oncology, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Hongwei Xia
- Division of Abdominal Cancer, Department of Medical Oncology, Cancer Center and Laboratory of Molecular Targeted Therapy in Oncology, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Feng Bi
- Division of Abdominal Cancer, Department of Medical Oncology, Cancer Center and Laboratory of Molecular Targeted Therapy in Oncology, West China Hospital, Sichuan University, Chengdu 610041, China
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23
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Zheng W, Yuan H, Fu Y, Deng G, Zheng X, Xu L, Fan H, Jiang W, Yu X. An effective two-stage NMBzA-induced rat esophageal tumor model revealing that the FAT-Hippo-YAP1 axis drives the progression of ESCC. Cancer Lett 2024; 588:216813. [PMID: 38499266 DOI: 10.1016/j.canlet.2024.216813] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Revised: 02/25/2024] [Accepted: 03/09/2024] [Indexed: 03/20/2024]
Abstract
Rat model of N-nitrosomethylbenzylamine (NMBzA)-induced esophageal squamous cell carcinoma (ESCC) is routinely used to study ESCC initiation, progression and new therapeutic strategies. However, the model is time-consuming and malignant tumor incidences are low. Here, we report the usage of multi-kinase inhibitor sorafenib as a tumor promoter to establish an efficient two-stage NMBzA-induced rat ESCC carcinogenesis model, resulting in increments of tumor incidences and shortened tumor formation times. By establishing the model and applying whole-genome sequencing, we discover that benign papillomas and malignant ESCCs harbor most of the "driver" events found in rat ESCCs (e.g. recurrent mutations in Ras family, the Hippo and Notch pathways and histone modifier genes) and the mutational landscapes of rat and human ESCCs overlap extensively. We generate tumor cell lines derived from NMBzA-induced papillomas and ESCCs, showing that papilloma cells retain more characteristics of normal epithelial cells than carcinoma cells, especially their exhibitions of normal rat cell karyotypes and inabilities of forming tumors in immunodeficient mice. Three-dimensional (3-D) organoid cultures and single cell RNA sequencing (scRNA-seq) indicate that, when compared to control- and papilloma-organoids, ESCC-organoids display salient abnormalities at tissue and single-cell levels. Multi-omic analyses indicate that NMBzA-induced rat ESCCs are accompanied by progressive hyperactivations of the FAT-Hippo-YAP1 axis and siRNA or inhibitors of YAP1 block the growth of rat ESCCs. Taken together, these studies provide a framework of using an effective rat ESCC model to investigate multilevel functional genomics of ESCC carcinogenesis, which justify targeting YAP1 as a therapeutic strategy for ESCC.
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Affiliation(s)
- Wei Zheng
- Department of Etiology and Carcinogenesis, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100021, China; State Key Laboratory of Molecular Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100021, China
| | - Hui Yuan
- Department of Etiology and Carcinogenesis, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100021, China; State Key Laboratory of Molecular Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100021, China
| | - Yuxia Fu
- Department of Etiology and Carcinogenesis, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100021, China; State Key Laboratory of Molecular Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100021, China
| | - Guodong Deng
- Department of Etiology and Carcinogenesis, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100021, China; State Key Laboratory of Molecular Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100021, China
| | - Xuejing Zheng
- Department of Etiology and Carcinogenesis, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100021, China; State Key Laboratory of Molecular Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100021, China
| | - Lei Xu
- Department of Etiology and Carcinogenesis, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100021, China; State Key Laboratory of Molecular Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100021, China
| | - Hongjun Fan
- Department of Etiology and Carcinogenesis, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100021, China; State Key Laboratory of Molecular Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100021, China
| | - Wei Jiang
- Department of Etiology and Carcinogenesis, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100021, China; State Key Laboratory of Molecular Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100021, China; Beijing Key Laboratory for Carcinogenesis and Cancer Prevention, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100021, China.
| | - Xiying Yu
- Department of Etiology and Carcinogenesis, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100021, China; State Key Laboratory of Molecular Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100021, China; Beijing Key Laboratory for Carcinogenesis and Cancer Prevention, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100021, China.
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24
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Adamopoulos C, Papavassiliou KA, Poulikakos PI, Papavassiliou AG. RAF and MEK Inhibitors in Non-Small Cell Lung Cancer. Int J Mol Sci 2024; 25:4633. [PMID: 38731852 PMCID: PMC11083651 DOI: 10.3390/ijms25094633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2024] [Revised: 04/17/2024] [Accepted: 04/22/2024] [Indexed: 05/13/2024] Open
Abstract
Lung cancer, despite recent advancements in survival rates, represents a significant global health burden. Non-small cell lung cancer (NSCLC), the most prevalent type, is driven largely by activating mutations in Kirsten rat sarcoma viral oncogene homologue (KRAS) and receptor tyrosine kinases (RTKs), and less in v-RAF murine sarcoma viral oncogene homolog B (BRAF) and mitogen-activated protein-kinase kinase (MEK), all key components of the RTK-RAS-mitogen-activated protein kinase (MAPK) pathway. Learning from melanoma, the identification of BRAFV600E substitution in NSCLC provided the rationale for the investigation of RAF and MEK inhibition as a therapeutic strategy. The regulatory approval of two RAF-MEK inhibitor combinations, dabrafenib-trametinib, in 2017, and encorafenib-binimetinib, in 2023, signifies a breakthrough for the management of BRAFV600E-mutant NSCLC patients. However, the almost universal emergence of acquired resistance limits their clinical benefit. New RAF and MEK inhibitors, with distinct biochemical characteristics, are in preclinical and clinical development. In this review, we aim to provide valuable insights into the current state of RAF and MEK inhibition in the management of NSCLC, fostering a deeper understanding of the potential impact on patient outcomes.
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Affiliation(s)
- Christos Adamopoulos
- Department of Biological Chemistry, Medical School, National and Kapodistrian University of Athens, 11527 Athens, Greece
- Department of Oncological Sciences, Precision Immunology Institute, Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA;
| | - Kostas A. Papavassiliou
- First University Department of Respiratory Medicine, ‘Sotiria’ Hospital, Medical School, National and Kapodistrian University of Athens, 11527 Athens, Greece;
| | - Poulikos I. Poulikakos
- Department of Oncological Sciences, Precision Immunology Institute, Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA;
| | - Athanasios G. Papavassiliou
- Department of Biological Chemistry, Medical School, National and Kapodistrian University of Athens, 11527 Athens, Greece
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25
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Gadal S, Boyer JA, Roy SF, Outmezguine NA, Sharma M, Li H, Fan N, Chan E, Romin Y, Barlas A, Chang Q, Pancholi P, Timaul NM, Overholtzer M, Yaeger R, Manova-Todorova K, de Stanchina E, Bosenberg M, Rosen N. Tumorigenesis driven by the BRAF V600E oncoprotein requires secondary mutations that overcome its feedback inhibition of migration and invasion. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2023.11.21.568071. [PMID: 38659913 PMCID: PMC11042182 DOI: 10.1101/2023.11.21.568071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/26/2024]
Abstract
BRAFV600E mutation occurs in 46% of melanomas and drives high levels of ERK activity and ERK-dependent proliferation. However, BRAFV600E is insufficient to drive melanoma in GEMM models, and 82% of human benign nevi harbor BRAFV600E mutations. We show here that BRAFV600E inhibits mesenchymal migration by causing feedback inhibition of RAC1 activity. ERK pathway inhibition induces RAC1 activation and restores migration and invasion. In cells with BRAFV600E, mutant RAC1, overexpression of PREX1, PREX2, or PTEN inactivation restore RAC1 activity and cell motility. Together, these lesions occur in 48% of BRAFV600E melanomas. Thus, although BRAFV600E activation of ERK deregulates cell proliferation, it prevents full malignant transformation by causing feedback inhibition of cell migration. Secondary mutations are, therefore, required for tumorigenesis. One mechanism underlying tumor evolution may be the selection of lesions that rescue the deleterious effects of oncogenic drivers.
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Affiliation(s)
- Sunyana Gadal
- Molecular Pharmacology Program, Sloan Kettering Institute for Cancer Research, Memorial Sloan Kettering Cancer Center (MSKCC), New York, NY 10065, USA
| | - Jacob A. Boyer
- Ludwig Institute for Cancer Research, Princeton University, Princeton, NJ 08544, USA
| | - Simon F. Roy
- Department of Dermatology, Yale University, New Haven, CT 06510, USA
- Department of Pathology, Yale University, New Haven, CT 06510, USA
| | - Noah A. Outmezguine
- Molecular Pharmacology Program, Sloan Kettering Institute for Cancer Research, Memorial Sloan Kettering Cancer Center (MSKCC), New York, NY 10065, USA
| | - Malvika Sharma
- Molecular Pharmacology Program, Sloan Kettering Institute for Cancer Research, Memorial Sloan Kettering Cancer Center (MSKCC), New York, NY 10065, USA
| | - Hongyan Li
- Antitumor Assessment Core Facility, Molecular Pharmacology Program, MSKCC, New York, NY 10065, USA
| | - Ning Fan
- Molecular Cytology Core, MSKCC, New York, NY 10065, USA
| | - Eric Chan
- Molecular Cytology Core, MSKCC, New York, NY 10065, USA
| | | | - Afsar Barlas
- Molecular Cytology Core, MSKCC, New York, NY 10065, USA
| | - Qing Chang
- Antitumor Assessment Core Facility, Molecular Pharmacology Program, MSKCC, New York, NY 10065, USA
| | - Priya Pancholi
- Molecular Pharmacology Program, Sloan Kettering Institute for Cancer Research, Memorial Sloan Kettering Cancer Center (MSKCC), New York, NY 10065, USA
| | - Neilawattie. Merna Timaul
- Molecular Pharmacology Program, Sloan Kettering Institute for Cancer Research, Memorial Sloan Kettering Cancer Center (MSKCC), New York, NY 10065, USA
| | | | - Rona Yaeger
- Department of Medicine, MSKCC, New York, NY 10065, USA
| | | | - Elisa de Stanchina
- Antitumor Assessment Core Facility, Molecular Pharmacology Program, MSKCC, New York, NY 10065, USA
| | - Marcus Bosenberg
- Department of Dermatology, Yale University, New Haven, CT 06510, USA
- Department of Pathology, Yale University, New Haven, CT 06510, USA
| | - Neal Rosen
- Molecular Pharmacology Program, Sloan Kettering Institute for Cancer Research, Memorial Sloan Kettering Cancer Center (MSKCC), New York, NY 10065, USA
- Department of Medicine, MSKCC, New York, NY 10065, USA
- Lead Contact
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26
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Clayton J, Romany A, Matenoglou E, Gavathiotis E, Poulikakos PI, Shen J. Mechanism of Dimer Selectivity and Binding Cooperativity of BRAF Inhibitors. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2023.12.12.571293. [PMID: 38168366 PMCID: PMC10760002 DOI: 10.1101/2023.12.12.571293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
Aberrant signaling of BRAFV600E is a major cancer driver. Current FDA-approved RAF inhibitors selectively inhibit the monomeric BRAFV600E and suffer from tumor resistance. Recently, dimer-selective and equipotent RAF inhibitors have been developed; however, the mechanism of dimer selectivity is poorly understood. Here, we report extensive molecular dynamics (MD) simulations of the monomeric and dimeric BRAFV600E in the apo form or in complex with one or two dimer-selective (PHI1) or equipotent (LY3009120) inhibitor(s). The simulations uncovered the unprecedented details of the remarkable allostery in BRAFV600E dimerization and inhibitor binding. Specifically, dimerization retrains and shifts the αC helix inward and increases the flexibility of the DFG motif; dimer compatibility is due to the promotion of the αC-in conformation, which is stabilized by a hydrogen bond formation between the inhibitor and the αC Glu501. A more stable hydrogen bond further restrains and shifts the αC helix inward, which incurs a larger entropic penalty that disfavors monomer binding. This mechanism led us to propose an empirical way based on the co-crystal structure to assess the dimer selectivity of a BRAFV600E inhibitor. Simulations also revealed that the positive cooperativity of PHI1 is due to its ability to preorganize the αC and DFG conformation in the opposite protomer, priming it for binding the second inhibitor. The atomically detailed view of the interplay between BRAF dimerization and inhibitor allostery as well as cooperativity has implications for understanding kinase signaling and contributes to the design of protomer selective RAF inhibitors.
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Affiliation(s)
- Joseph Clayton
- Department of Pharmaceutical Sciences, University of Maryland School of Pharmacy, Baltimore, MD 21201, United States
- Division of Applied Regulatory Science, Office of Clinical Pharmacology, Office of Translational Sciences, Center for Drug Evaluation and Research, United States Food and Drug Administration, Silver Spring, MD 20993, United States
| | - Aarion Romany
- Department of Pharmaceutical Sciences, University of Maryland School of Pharmacy, Baltimore, MD 21201, United States
| | - Evangelia Matenoglou
- Department of Biochemistry, Department of Medicine, Department of Oncology, Montefiore Einstein Comprehensive Cancer Center, Albert Einstein College of Medicine, New York, NY 10461, United States
| | - Evripidis Gavathiotis
- Department of Biochemistry, Department of Medicine, Department of Oncology, Montefiore Einstein Comprehensive Cancer Center, Albert Einstein College of Medicine, New York, NY 10461, United States
| | - Poulikos I Poulikakos
- Department of Oncological Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, United States
| | - Jana Shen
- Department of Pharmaceutical Sciences, University of Maryland School of Pharmacy, Baltimore, MD 21201, United States
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27
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Planchard D, Sanborn RE, Negrao MV, Vaishnavi A, Smit EF. BRAF V600E-mutant metastatic NSCLC: disease overview and treatment landscape. NPJ Precis Oncol 2024; 8:90. [PMID: 38627602 PMCID: PMC11021522 DOI: 10.1038/s41698-024-00552-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Accepted: 02/15/2024] [Indexed: 04/19/2024] Open
Abstract
In this review, we cover the current understanding of BRAF mutations and associated clinical characteristics in patients with metastatic NSCLC, approved and emerging treatment options, BRAF sequencing approaches, and unmet needs. The BRAFV600E mutation confers constitutive activity of the MAPK pathway, leading to enhanced growth, proliferation, and survival of tumor cells. Testing for BRAF mutations enables patients to be treated with therapies that directly target BRAFV600E and the MAPK pathway, but BRAF testing lags behind other oncogene testing in metastatic NSCLC. Additional therapies targeting BRAFV600E mutations provide options for patients with metastatic NSCLC. Emerging therapies and combinations under investigation could potentially overcome issues of resistance and target non-V600E mutations. Therefore, because targeted therapies with enhanced efficacy are on the horizon, being able to identify BRAF mutations in metastatic NSCLC may become even more important.
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Affiliation(s)
- David Planchard
- Thoracic Cancer Group, Department of Medical Oncology, Gustave Roussy, Villejuif, France.
| | - Rachel E Sanborn
- Earle A. Chiles Research Institute, Providence Cancer Institute, Portland, OR, USA
| | - Marcelo V Negrao
- Department of Thoracic/Head and Neck Medical Oncology, Division of Cancer Medicine, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Aria Vaishnavi
- Department of Cancer Biology, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Egbert F Smit
- Department of Pulmonary Disease, Leiden University Medical Centre, Leiden, Netherlands
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28
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Ash LJ, Busia-Bourdain O, Okpattah D, Kamel A, Liberchuk A, Wolfe AL. KRAS: Biology, Inhibition, and Mechanisms of Inhibitor Resistance. Curr Oncol 2024; 31:2024-2046. [PMID: 38668053 PMCID: PMC11049385 DOI: 10.3390/curroncol31040150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2024] [Revised: 03/29/2024] [Accepted: 04/01/2024] [Indexed: 04/28/2024] Open
Abstract
KRAS is a small GTPase that is among the most commonly mutated oncogenes in cancer. Here, we discuss KRAS biology, therapeutic avenues to target it, and mechanisms of resistance that tumors employ in response to KRAS inhibition. Several strategies are under investigation for inhibiting oncogenic KRAS, including small molecule compounds targeting specific KRAS mutations, pan-KRAS inhibitors, PROTACs, siRNAs, PNAs, and mutant KRAS-specific immunostimulatory strategies. A central challenge to therapeutic effectiveness is the frequent development of resistance to these treatments. Direct resistance mechanisms can involve KRAS mutations that reduce drug efficacy or copy number alterations that increase the expression of mutant KRAS. Indirect resistance mechanisms arise from mutations that can rescue mutant KRAS-dependent cells either by reactivating the same signaling or via alternative pathways. Further, non-mutational forms of resistance can take the form of epigenetic marks, transcriptional reprogramming, or alterations within the tumor microenvironment. As the possible strategies to inhibit KRAS expand, understanding the nuances of resistance mechanisms is paramount to the development of both enhanced therapeutics and innovative drug combinations.
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Affiliation(s)
- Leonard J. Ash
- Department of Biological Sciences, Hunter College, City University of New York, New York, NY 10065, USA
- Molecular, Cellular, and Developmental Biology Subprogram of the Biology Ph.D. Program, Graduate Center, City University of New York, New York, NY 10031, USA
| | - Ottavia Busia-Bourdain
- Department of Biological Sciences, Hunter College, City University of New York, New York, NY 10065, USA
| | - Daniel Okpattah
- Biochemistry Ph.D. Program, Graduate Center, City University of New York, New York, NY 10031, USA
| | - Avrosina Kamel
- Department of Biological Sciences, Hunter College, City University of New York, New York, NY 10065, USA
- Macaulay Honors College, Hunter College, City University of New York, New York, NY 10065, USA
| | - Ariel Liberchuk
- Department of Biological Sciences, Hunter College, City University of New York, New York, NY 10065, USA
- Macaulay Honors College, Hunter College, City University of New York, New York, NY 10065, USA
| | - Andrew L. Wolfe
- Department of Biological Sciences, Hunter College, City University of New York, New York, NY 10065, USA
- Molecular, Cellular, and Developmental Biology Subprogram of the Biology Ph.D. Program, Graduate Center, City University of New York, New York, NY 10031, USA
- Biochemistry Ph.D. Program, Graduate Center, City University of New York, New York, NY 10031, USA
- Department of Pharmacology, Weill Cornell Medicine, New York, NY 10021, USA
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29
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Watanabe H, Inoue Y, Karayama M, Yazawa S, Mochizuka Y, Yasui H, Hozumi H, Suzuki Y, Furuhashi K, Enomoto N, Fujisawa T, Shinmura K, Inui N, Suda T. Characterization of BRAFThr599dup Mutation as a Targetable Driver Mutation Identified in Lung Adenocarcinoma by Comprehensive Genomic Profiling. JCO Precis Oncol 2024; 8:e2300538. [PMID: 38662982 DOI: 10.1200/po.23.00538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 02/09/2024] [Accepted: 02/20/2024] [Indexed: 04/30/2024] Open
Abstract
PURPOSE Understanding the function of BRAF mutants is crucial for determining the best treatment strategy. This study aimed to characterize a rare BRAF variant, BRAFThr599dup, which was identified in a patient with lung adenocarcinoma (LUAD) by comprehensive genomic profiling. MATERIALS AND METHODS We report a case of LUAD with BRAFThr599dup treated with dabrafenib and trametinib. We conditionally expressed wild-type BRAF, BRAFV600E, or BRAFThr599dup in Ba/F3 cells and BEAS-2B cells. Ba/F3 cells carrying double-mutant BRAF (BRAFThr599dup/R509H, BRAFV600E/R509H, or BRAFK601E/R509H) that lacked the dimerizing ability were also established. Knockout of endogenous BRAF or CRAF in Ba/F3-BRAFThr599dup cells and Ba/F3-BRAFV600E cells was performed using the CRISPR/Cas9 system. Cell viability, mitogen-activated protein kinase (MAPK) signaling activity, and sensitivity to dabrafenib and trametinib were evaluated. RESULTS The patient was revealed to have BRAFThr599dup-positive tumor cells as a predominant clone, and dabrafenib and trametinib treatment showed modest efficacy. In Ba/F3 cells, both BRAFThr599dup and BRAFV600E similarly caused interleukin-3-independent proliferation and activated the MAPK pathway. Moreover, BRAFThr599dup and BRAFV600E similarly caused a significant increase in the anchorage-independent growth ability of BEAS-2B cells. Along with Ba/F3-BRAFV600E cells, Ba/F3-BRAFThr599dup cells were highly sensitive to a monomer-specific BRAF inhibitor, dabrafenib, with a half-maximal inhibitory concentration value of 29.7 nM. In the absence of wild-type BRAF, wild-type CRAF, or an intact dimer interface, the ability to induce oncogenic addiction and MAPK pathway activation in Ba/F3-BRAFThr599dup cells was not affected, which was in contrast to the findings in the BRAFK601E/R509H double-mutant model. CONCLUSION BRAFThr599dup is a potent driver oncogene that activates the MAPK pathway without the requirement for dimerization in vitro. Because BRAFThr599dup has been recurrently reported across various cancer types, our findings should be further investigated both mechanistically and clinically.
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Affiliation(s)
- Hirofumi Watanabe
- Second Division, Department of Internal Medicine, Hamamatsu University School of Medicine, Hamamatsu, Japan
- Department of Tumor Pathology, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Yusuke Inoue
- Second Division, Department of Internal Medicine, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Masato Karayama
- Second Division, Department of Internal Medicine, Hamamatsu University School of Medicine, Hamamatsu, Japan
- Department of Chemotherapy, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Shusuke Yazawa
- Second Division, Department of Internal Medicine, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Yasutaka Mochizuka
- Second Division, Department of Internal Medicine, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Hideki Yasui
- Second Division, Department of Internal Medicine, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Hironao Hozumi
- Second Division, Department of Internal Medicine, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Yuzo Suzuki
- Second Division, Department of Internal Medicine, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Kazuki Furuhashi
- Second Division, Department of Internal Medicine, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Noriyuki Enomoto
- Second Division, Department of Internal Medicine, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Tomoyuki Fujisawa
- Second Division, Department of Internal Medicine, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Kazuya Shinmura
- Department of Tumor Pathology, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Naoki Inui
- Second Division, Department of Internal Medicine, Hamamatsu University School of Medicine, Hamamatsu, Japan
- Department of Clinical Pharmacology and Therapeutics, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Takafumi Suda
- Second Division, Department of Internal Medicine, Hamamatsu University School of Medicine, Hamamatsu, Japan
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30
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Weatherdon L, Stuart K, Cassidy M, de la Gándara AM, Okkenhaug H, Muellener M, Mckenzie G, Cook SJ, Gilley R. Reporter cell lines to screen for inhibitors or regulators of the KRAS-RAF-MEK1/2-ERK1/2 pathway. Biochem J 2024; 481:405-422. [PMID: 38381045 PMCID: PMC11088904 DOI: 10.1042/bcj20240015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Revised: 02/20/2024] [Accepted: 02/21/2024] [Indexed: 02/22/2024]
Abstract
The RAS-regulated RAF-MEK1/2-ERK1/2 signalling pathway is activated in cancer due to mutations in RAS proteins (especially KRAS), BRAF, CRAF, MEK1 and MEK2. Whilst inhibitors of KRASG12C (lung adenocarcinoma) and BRAF and MEK1/2 (melanoma and colorectal cancer) are clinically approved, acquired resistance remains a problem. Consequently, the search for new inhibitors (especially of RAS proteins), new inhibitor modalities and regulators of this pathway, which may be new drug targets, continues and increasingly involves cell-based screens with small molecules or genetic screens such as RNAi, CRISPR or protein interference. Here we describe cell lines that exhibit doxycycline-dependent expression KRASG12V or BRAFV600E and harbour a stably integrated EGR1:EmGFP reporter gene that can be detected by flow cytometry, high-content microscopy or immunoblotting. KRASG12V or BRAFV600E-driven EmGFP expression is inhibited by MEK1/2 or ERK1/2 inhibitors (MEKi and ERKi). BRAFi inhibit BRAFV600E-driven EmGFP expression but enhance the response to KRASG12V, recapitulating paradoxical activation of wild type RAF proteins. In addition to small molecules, expression of iDab6, encoding a RAS-specific antibody fragment inhibited KRASG12V- but not BRAFV600E-driven EmGFP expression. Finally, substitution of EmGFP for a bacterial nitroreductase gene allowed KRASG12V or BRAFV600E to drive cell death in the presence of a pro-drug, which may allow selection of pathway inhibitors that promote survival. These cell lines should prove useful for cell-based screens to identify new regulators of KRAS- or BRAF-dependent ERK1/2 signalling (drug target discovery) as well as screening or triaging 'hits' from drug discovery screens.
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Affiliation(s)
- Laura Weatherdon
- Signalling Programme, The Babraham Institute, Babraham Research Campus, Cambridge CB22 3AT, U.K
| | - Kate Stuart
- Signalling Programme, The Babraham Institute, Babraham Research Campus, Cambridge CB22 3AT, U.K
- Phoremost, Unit 7, The Works, Unity Campus, Pampisford, Cambridge CB22 3FT, U.K
| | - Megan Cassidy
- Signalling Programme, The Babraham Institute, Babraham Research Campus, Cambridge CB22 3AT, U.K
| | | | - Hanneke Okkenhaug
- Imaging Facility, The Babraham Institute, Babraham Research Campus, Cambridge CB22 3AT, U.K
| | - Markus Muellener
- Phoremost, Unit 7, The Works, Unity Campus, Pampisford, Cambridge CB22 3FT, U.K
| | - Grahame Mckenzie
- Phoremost, Unit 7, The Works, Unity Campus, Pampisford, Cambridge CB22 3FT, U.K
| | - Simon J. Cook
- Signalling Programme, The Babraham Institute, Babraham Research Campus, Cambridge CB22 3AT, U.K
| | - Rebecca Gilley
- Signalling Programme, The Babraham Institute, Babraham Research Campus, Cambridge CB22 3AT, U.K
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Dinter L, Karitzky PC, Schulz A, Wurm AA, Mehnert MC, Sergon M, Tunger A, Lesche M, Wehner R, Müller A, Käubler T, Niessner H, Dahl A, Beissert S, Schmitz M, Meier F, Seliger B, Westphal D. BRAF and MEK inhibitor combinations induce potent molecular and immunological effects in NRAS-mutant melanoma cells: Insights into mode of action and resistance mechanisms. Int J Cancer 2024; 154:1057-1072. [PMID: 38078628 DOI: 10.1002/ijc.34807] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 10/17/2023] [Accepted: 11/03/2023] [Indexed: 01/23/2024]
Abstract
About 25% of melanoma harbor activating NRAS mutations, which are associated with aggressive disease therefore requiring a rapid antitumor intervention. However, no efficient targeted therapy options are currently available for patients with NRAS-mutant melanoma. MEK inhibitors (MEKi) appear to display a moderate antitumor activity and also immunological effects in NRAS-mutant melanoma, providing an ideal backbone for combination treatments. In our study, the MEKi binimetinib, cobimetinib and trametinib combined with the BRAF inhibitors (BRAFi) encorafenib, vemurafenib and dabrafenib were investigated for their ability to inhibit proliferation, induce apoptosis and alter the expression of immune modulatory molecules in sensitive NRAS-mutant melanoma cells using two- and three-dimensional cell culture models as well as RNA sequencing analyses. Furthermore, NRAS-mutant melanoma cells resistant to the three BRAFi/MEKi combinations were established to characterize the mechanisms contributing to their resistance. All BRAFi induced a stress response in the sensitive NRAS-mutant melanoma cells thereby significantly enhancing the antiproliferative and proapoptotic activity of the MEKi analyzed. Furthermore, BRAFi/MEKi combinations upregulated immune relevant molecules, such as ICOS-L, components of antigen-presenting machinery and the "don't eat me signal" molecule CD47 in the melanoma cells. The BRAFi/MEKi-resistant, NRAS-mutant melanoma cells counteracted the molecular and immunological effects of BRAFi/MEKi by upregulating downstream mitogen-activated protein kinase pathway molecules, inhibiting apoptosis and promoting immune escape mechanisms. Together, our study reveals potent molecular and immunological effects of BRAFi/MEKi in sensitive NRAS-mutant melanoma cells that may be exploited in new combinational treatment strategies for patients with NRAS-mutant melanoma.
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Affiliation(s)
- Lisa Dinter
- Department of Dermatology, Faculty of Medicine and University Hospital Carl Gustav Carus at TU Dresden, Dresden, Germany
- National Center for Tumor Diseases (NCT) Dresden, a partnership between German Cancer Research Center (DKFZ), Faculty of Medicine and University Hospital Carl Gustav Carus at TU Dresden, and Helmholtz-Zentrum Dresden - Rossendorf (HZDR), Dresden, Germany
| | - Paula C Karitzky
- Department of Dermatology, Faculty of Medicine and University Hospital Carl Gustav Carus at TU Dresden, Dresden, Germany
| | - Alexander Schulz
- Department of Dermatology, Faculty of Medicine and University Hospital Carl Gustav Carus at TU Dresden, Dresden, Germany
- National Center for Tumor Diseases (NCT) Dresden, a partnership between German Cancer Research Center (DKFZ), Faculty of Medicine and University Hospital Carl Gustav Carus at TU Dresden, and Helmholtz-Zentrum Dresden - Rossendorf (HZDR), Dresden, Germany
| | - Alexander A Wurm
- National Center for Tumor Diseases (NCT) Dresden, a partnership between German Cancer Research Center (DKFZ), Faculty of Medicine and University Hospital Carl Gustav Carus at TU Dresden, and Helmholtz-Zentrum Dresden - Rossendorf (HZDR), Dresden, Germany
- Department of Translational Medical Oncology, NCT Dresden, Dresden, Germany
- Mildred Scheel Early Career Center, NCT Dresden, Medical Faculty and University Hospital Carl Gustav Carus at TU Dresden, Dresden, Germany
| | - Marie-Christin Mehnert
- Department of Dermatology, Faculty of Medicine and University Hospital Carl Gustav Carus at TU Dresden, Dresden, Germany
- National Center for Tumor Diseases (NCT) Dresden, a partnership between German Cancer Research Center (DKFZ), Faculty of Medicine and University Hospital Carl Gustav Carus at TU Dresden, and Helmholtz-Zentrum Dresden - Rossendorf (HZDR), Dresden, Germany
| | - Mildred Sergon
- Institute of Pathology, University Hospital Carl Gustav Carus at TU Dresden, Dresden, Germany
| | - Antje Tunger
- National Center for Tumor Diseases (NCT) Dresden, a partnership between German Cancer Research Center (DKFZ), Faculty of Medicine and University Hospital Carl Gustav Carus at TU Dresden, and Helmholtz-Zentrum Dresden - Rossendorf (HZDR), Dresden, Germany
- Institute of Immunology, Faculty of Medicine Carl Gustav Carus, TU Dresden, Dresden, Germany
| | - Mathias Lesche
- DRESDEN-Concept Genome Center, Technology Platform at the Center for Molecular and Cellular Bioengineering (CMCB), TU Dresden, Dresden, Germany
| | - Rebekka Wehner
- National Center for Tumor Diseases (NCT) Dresden, a partnership between German Cancer Research Center (DKFZ), Faculty of Medicine and University Hospital Carl Gustav Carus at TU Dresden, and Helmholtz-Zentrum Dresden - Rossendorf (HZDR), Dresden, Germany
- Institute of Immunology, Faculty of Medicine Carl Gustav Carus, TU Dresden, Dresden, Germany
- German Cancer Consortium (DKTK), Partner Site Dresden, and German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Anja Müller
- Medical Faculty, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany
| | - Theresa Käubler
- Department of Dermatology, Faculty of Medicine and University Hospital Carl Gustav Carus at TU Dresden, Dresden, Germany
| | - Heike Niessner
- Department of Dermatology, Oncology, University Medical Center, Tübingen, Germany
| | - Andreas Dahl
- DRESDEN-Concept Genome Center, Technology Platform at the Center for Molecular and Cellular Bioengineering (CMCB), TU Dresden, Dresden, Germany
| | - Stefan Beissert
- Department of Dermatology, Faculty of Medicine and University Hospital Carl Gustav Carus at TU Dresden, Dresden, Germany
- National Center for Tumor Diseases (NCT) Dresden, a partnership between German Cancer Research Center (DKFZ), Faculty of Medicine and University Hospital Carl Gustav Carus at TU Dresden, and Helmholtz-Zentrum Dresden - Rossendorf (HZDR), Dresden, Germany
| | - Marc Schmitz
- National Center for Tumor Diseases (NCT) Dresden, a partnership between German Cancer Research Center (DKFZ), Faculty of Medicine and University Hospital Carl Gustav Carus at TU Dresden, and Helmholtz-Zentrum Dresden - Rossendorf (HZDR), Dresden, Germany
- Institute of Immunology, Faculty of Medicine Carl Gustav Carus, TU Dresden, Dresden, Germany
- German Cancer Consortium (DKTK), Partner Site Dresden, and German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Friedegund Meier
- Department of Dermatology, Faculty of Medicine and University Hospital Carl Gustav Carus at TU Dresden, Dresden, Germany
- National Center for Tumor Diseases (NCT) Dresden, a partnership between German Cancer Research Center (DKFZ), Faculty of Medicine and University Hospital Carl Gustav Carus at TU Dresden, and Helmholtz-Zentrum Dresden - Rossendorf (HZDR), Dresden, Germany
- Skin Cancer Center at the University Cancer Center Dresden, University Hospital Carl Gustav Carus at TU Dresden, Dresden, Germany
| | - Barbara Seliger
- Medical Faculty, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany
- Institute of Translational Immunology, Medical School "Theodor Fontane", Brandenburg an der Havel, Germany
- Fraunhofer Institute for Cell Therapy and Immunology, Leipzig, Germany
| | - Dana Westphal
- Department of Dermatology, Faculty of Medicine and University Hospital Carl Gustav Carus at TU Dresden, Dresden, Germany
- National Center for Tumor Diseases (NCT) Dresden, a partnership between German Cancer Research Center (DKFZ), Faculty of Medicine and University Hospital Carl Gustav Carus at TU Dresden, and Helmholtz-Zentrum Dresden - Rossendorf (HZDR), Dresden, Germany
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Li C, Wang Z, Yao L, Lin X, Jian Y, Li Y, Zhang J, Shao J, Tran PD, Hagman JR, Cao M, Cong Y, Li HY, Goding CR, Xu ZX, Liao X, Miao X, Cui R. Mi-2β promotes immune evasion in melanoma by activating EZH2 methylation. Nat Commun 2024; 15:2163. [PMID: 38461299 PMCID: PMC10924921 DOI: 10.1038/s41467-024-46422-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Accepted: 02/27/2024] [Indexed: 03/11/2024] Open
Abstract
Recent development of new immune checkpoint inhibitors has been particularly successfully in cancer treatment, but still the majority patients fail to benefit. Converting resistant tumors to immunotherapy sensitive will provide a significant improvement in patient outcome. Here we identify Mi-2β as a key melanoma-intrinsic effector regulating the adaptive anti-tumor immune response. Studies in genetically engineered mouse melanoma models indicate that loss of Mi-2β rescues the immune response to immunotherapy in vivo. Mechanistically, ATAC-seq analysis shows that Mi-2β controls the accessibility of IFN-γ-stimulated genes (ISGs). Mi-2β binds to EZH2 and promotes K510 methylation of EZH2, subsequently activating the trimethylation of H3K27 to inhibit the transcription of ISGs. Finally, we develop an Mi-2β-targeted inhibitor, Z36-MP5, which reduces Mi-2β ATPase activity and reactivates ISG transcription. Consequently, Z36-MP5 induces a response to immune checkpoint inhibitors in otherwise resistant melanoma models. Our work provides a potential therapeutic strategy to convert immunotherapy resistant melanomas to sensitive ones.
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Affiliation(s)
- Cang Li
- Skin Disease Research Institute, The 2nd Hospital and School of Medicine, Zhejiang University, Hangzhou, 310058, China
- Research Center for Life Science and Human Health, Binjiang Institute of Zhejiang University, Hangzhou, 310053, China
| | - Zhengyu Wang
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Arkansas for Medical Science, Little Rock, AR, 72205, USA
| | - Licheng Yao
- State Key Laboratory of Molecular Oncology, School of Pharmaceutical Sciences, Tsinghua-Peking Center for Life Science, Tsinghua University, Beijing, 100084, China
| | - Xingyu Lin
- Zhuhai Yu Fan Biotechnologies Co. Ltd, Zhuhai, Guangdong, 51900, China
| | - Yongping Jian
- School of Life Sciences, Henan University, Kaifeng, 475000, China
| | - Yujia Li
- School of Life Sciences, Henan University, Kaifeng, 475000, China
| | - Jie Zhang
- National Key Laboratory for Novel Software Technology, Nanjing University, Nanjing, Jiangsu, China
| | - Jingwei Shao
- National & Local Joint Engineering Research Center of Targeted and Innovative Therapeutics, International Academy of Targeted Therapeutics and Innovation, College of Pharmacy, Chongqing University of Arts and Sciences, Chongqing, 402160, China
| | - Phuc D Tran
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Arkansas for Medical Science, Little Rock, AR, 72205, USA
| | - James R Hagman
- Department of Immunology and Genomic Medicine, National Jewish Health, Denver, CO, 80206, USA
| | - Meng Cao
- Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, 210023, China
| | - Yusheng Cong
- Key Laboratory of Aging and Cancer Biology of Zhejiang Province, Hangzhou Normal University School of Basic Medical Sciences, Hangzhou, 310058, China
| | - Hong-Yu Li
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Arkansas for Medical Science, Little Rock, AR, 72205, USA.
| | - Colin R Goding
- Ludwig Institute for Cancer Research, Nuffield Department of Clinical Medicine, University of Oxford, Headington, Oxford, OX3 7DQ, UK.
| | - Zhi-Xiang Xu
- School of Life Sciences, Henan University, Kaifeng, 475000, China.
| | - Xuebin Liao
- State Key Laboratory of Molecular Oncology, School of Pharmaceutical Sciences, Tsinghua-Peking Center for Life Science, Tsinghua University, Beijing, 100084, China.
| | - Xiao Miao
- Department of Dermatology, Shuguang Hospital of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, 200437, China.
- The MOE Basic Research and Innovation Center for the Targeted Therapeutics of Solid Tumors, Jiangxi Medical College, Nanchang University, Nanchang, China.
| | - Rutao Cui
- Skin Disease Research Institute, The 2nd Hospital and School of Medicine, Zhejiang University, Hangzhou, 310058, China.
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Hanrahan AJ, Chen Z, Rosen N, Solit DB. BRAF - a tumour-agnostic drug target with lineage-specific dependencies. Nat Rev Clin Oncol 2024; 21:224-247. [PMID: 38278874 DOI: 10.1038/s41571-023-00852-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/12/2023] [Indexed: 01/28/2024]
Abstract
In June 2022, the FDA granted Accelerated Approval to the BRAF inhibitor dabrafenib in combination with the MEK inhibitor trametinib for the treatment of adult and paediatric patients (≥6 years of age) with unresectable or metastatic BRAFV600E-mutant solid tumours, except for BRAFV600E-mutant colorectal cancers. The histology-agnostic approval of dabrafenib plus trametinib marks the culmination of two decades of research into the landscape of BRAF mutations in human cancers, the biochemical mechanisms underlying BRAF-mediated tumorigenesis, and the clinical development of selective RAF and MEK inhibitors. Although the majority of patients with BRAFV600E-mutant tumours derive clinical benefit from BRAF inhibitor-based combinations, resistance to treatment develops in most. In this Review, we describe the biochemical basis for oncogenic BRAF-induced activation of MAPK signalling and pan-cancer and lineage-specific mechanisms of intrinsic, adaptive and acquired resistance to BRAF inhibitors. We also discuss novel RAF inhibitors and drug combinations designed to delay the emergence of treatment resistance and/or expand the population of patients with BRAF-mutant cancers who benefit from molecularly targeted therapies.
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Affiliation(s)
- Aphrothiti J Hanrahan
- Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Ziyu Chen
- Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY, USA
- Department of Physiology, Biophysics & Systems Biology, Weill Cornell Graduate School of Medical Sciences, Cornell University, New York, NY, USA
| | - Neal Rosen
- Molecular Pharmacology Program, Sloan Kettering Institute for Cancer Research, Memorial Sloan Kettering Cancer Center, New York, NY, USA
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, NY, USA
- Weill Cornell Medical College, Cornell University, New York, NY, USA
| | - David B Solit
- Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY, USA.
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, NY, USA.
- Weill Cornell Medical College, Cornell University, New York, NY, USA.
- Marie-Josée and Henry R. Kravis Center for Molecular Oncology, Memorial Sloan Kettering Cancer Center, New York, NY, USA.
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34
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Marsiglia WM, Chow A, Khan ZM, He L, Dar AC. Live-cell target engagement of allosteric MEKi on MEK-RAF/KSR-14-3-3 complexes. Nat Chem Biol 2024; 20:373-381. [PMID: 37919548 PMCID: PMC10948974 DOI: 10.1038/s41589-023-01454-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Accepted: 09/19/2023] [Indexed: 11/04/2023]
Abstract
The RAS-mitogen-activated protein kinase (MAPK) pathway includes KSR, RAF, MEK and the phospho-regulatory sensor 14-3-3. Specific assemblies among these components drive various diseases and likely dictate efficacy for numerous targeted therapies, including allosteric MEK inhibitors (MEKi). However, directly measuring drug interactions on physiological RAS-MAPK complexes in live cells has been inherently challenging to query and therefore remains poorly understood. Here we present a series of NanoBRET-based assays to quantify direct target engagement of MEKi on MEK1 and higher-order MEK1-bound complexes with ARAF, BRAF, CRAF, KSR1 and KSR2 in the presence and absence of 14-3-3 in living cells. We find distinct MEKi preferences among these complexes that can be compiled to generate inhibitor binding profiles. Further, these assays can report on the influence of the pathogenic BRAF-V600E mutant on MEKi binding. Taken together, these approaches can be used as a platform to screen for compounds intended to target specific complexes in the RAS-MAPK cascade.
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Affiliation(s)
- William M Marsiglia
- Department of Oncological Sciences, The Tisch Cancer Institute, Mount Sinai Center for Therapeutic Discovery, Icahn School of Medicine at Mount Sinai, New York, NY, USA.
- Department of Pharmacological Sciences, The Tisch Cancer Institute, Mount Sinai Center for Therapeutic Discovery, Icahn School of Medicine at Mount Sinai, New York, NY, USA.
- Department of Pharmacology and Toxicology, The University of Alabama at Birmingham, Birmingham, AL, USA.
| | - Arthur Chow
- Department of Oncological Sciences, The Tisch Cancer Institute, Mount Sinai Center for Therapeutic Discovery, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Department of Pharmacological Sciences, The Tisch Cancer Institute, Mount Sinai Center for Therapeutic Discovery, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Program in Chemical Biology, Sloan Kettering Institute, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Zaigham M Khan
- Department of Oncological Sciences, The Tisch Cancer Institute, Mount Sinai Center for Therapeutic Discovery, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Department of Pharmacological Sciences, The Tisch Cancer Institute, Mount Sinai Center for Therapeutic Discovery, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Liu He
- Department of Oncological Sciences, The Tisch Cancer Institute, Mount Sinai Center for Therapeutic Discovery, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Department of Pharmacological Sciences, The Tisch Cancer Institute, Mount Sinai Center for Therapeutic Discovery, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Program in Chemical Biology, Sloan Kettering Institute, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Arvin C Dar
- Department of Oncological Sciences, The Tisch Cancer Institute, Mount Sinai Center for Therapeutic Discovery, Icahn School of Medicine at Mount Sinai, New York, NY, USA.
- Department of Pharmacological Sciences, The Tisch Cancer Institute, Mount Sinai Center for Therapeutic Discovery, Icahn School of Medicine at Mount Sinai, New York, NY, USA.
- Program in Chemical Biology, Sloan Kettering Institute, Memorial Sloan Kettering Cancer Center, New York, NY, USA.
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35
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Riley MJ, Mitchell CC, Ernst SE, Taylor EB, Welsh MJ. A model for stimulation of enzyme activity by a competitive inhibitor based on the interaction of terazosin and phosphoglycerate kinase 1. Proc Natl Acad Sci U S A 2024; 121:e2318956121. [PMID: 38377207 PMCID: PMC10907273 DOI: 10.1073/pnas.2318956121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Accepted: 01/21/2024] [Indexed: 02/22/2024] Open
Abstract
The drug terazosin (TZ) binds to and can enhance the activity of the glycolytic enzyme phosphoglycerate kinase 1 (PGK1) and can increase ATP levels. That finding prompted studies of TZ in Parkinson's disease (PD) in which decreased neuronal energy metabolism is a hallmark feature. TZ was neuroprotective in cell-based and animal PD models and in large epidemiological studies of humans. However, how TZ might increase PGK1 activity has remained a perplexing question because structural data revealed that the site of TZ binding to PGK1 overlaps with the site of substrate binding, predicting that TZ would competitively inhibit activity. Functional data also indicate that TZ is a competitive inhibitor. To explore the paradoxical observation of a competitive inhibitor increasing enzyme activity under some conditions, we developed a mass action model of TZ and PGK1 interactions using published data on PGK1 kinetics and the effect of varying TZ concentrations. The model indicated that TZ-binding introduces a bypass pathway that accelerates product release. At low concentrations, TZ binding circumvents slow product release and increases the rate of enzymatic phosphotransfer. However, at high concentrations, TZ inhibits PGK1 activity. The model explains stimulation of enzyme activity by a competitive inhibitor and the biphasic dose-response relationship for TZ and PGK1 activity. By providing a plausible mechanism for interactions between TZ and PGK1, these findings may aid development of TZ or other agents as potential therapeutics for neurodegenerative diseases. The results may also have implications for agents that interact with the active site of other enzymes.
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Affiliation(s)
- Mitchell J. Riley
- Department of Mathematics, University of Iowa, Iowa City, IA52242
- Department of Internal Medicine, Pappajohn Biomedical Institute, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, IA52242
| | | | - Sarah E. Ernst
- Department of Internal Medicine, Pappajohn Biomedical Institute, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, IA52242
- HHMI, University of Iowa, Iowa City, IA52242
| | - Eric B. Taylor
- Department of Molecular Physiology and Biophysics, Pappajohn Biomedical Institute, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, IA52242
| | - Michael J. Welsh
- Department of Internal Medicine, Pappajohn Biomedical Institute, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, IA52242
- HHMI, University of Iowa, Iowa City, IA52242
- Department of Molecular Physiology and Biophysics, Pappajohn Biomedical Institute, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, IA52242
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36
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Flower CT, Liu C, Chuang HY, Ye X, Cheng H, Heath JR, Wei W, White FM. Signaling and transcriptional dynamics underlying early adaptation to oncogenic BRAF inhibition. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.02.19.581004. [PMID: 39071317 PMCID: PMC11275845 DOI: 10.1101/2024.02.19.581004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/30/2024]
Abstract
A major contributor to poor sensitivity to anti-cancer kinase inhibitor therapy is drug-induced cellular adaptation, whereby remodeling of signaling and gene regulatory networks permits a drug-tolerant phenotype. Here, we resolve the scale and kinetics of critical subcellular events following oncogenic kinase inhibition and preceding cell cycle re-entry, using mass spectrometry-based phosphoproteomics and RNA sequencing to capture molecular snapshots within the first minutes, hours, and days of BRAF kinase inhibitor exposure in a human BRAF -mutant melanoma model of adaptive therapy resistance. By enriching specific phospho-motifs associated with mitogenic kinase activity, we monitored the dynamics of thousands of growth- and survival-related protein phosphorylation events under oncogenic BRAF inhibition and drug removal. We observed early and sustained inhibition of the BRAF-ERK axis, gradual downregulation of canonical cell cycle-dependent signals, and three distinct and reversible phase transitions toward quiescence. Statistical inference of kinetically-defined signaling and transcriptional modules revealed a concerted response to oncogenic BRAF inhibition and a dominant compensatory induction of SRC family kinase (SFK) signaling, which we found to be at least partially driven by accumulation of reactive oxygen species via impaired redox homeostasis. This induction sensitized cells to co-treatment with an SFK inhibitor across a panel of patient-derived melanoma cell lines and in an orthotopic mouse xenograft model, underscoring the translational potential for measuring the early temporal dynamics of signaling and transcriptional networks under therapeutic challenge.
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37
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Chen YK, Kanouni T, Arnold LD, Cox JM, Gardiner E, Grandinetti K, Jiang P, Kaldor SW, Lee C, Li C, Martin ES, Miller N, Murphy EA, Timple N, Tyhonas JS, Vassar A, Wang TS, Williams R, Yuan D, Kania RS. The Discovery of Exarafenib (KIN-2787): Overcoming the Challenges of Pan-RAF Kinase Inhibition. J Med Chem 2024; 67:1747-1757. [PMID: 38230963 DOI: 10.1021/acs.jmedchem.3c01830] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2024]
Abstract
RAF, a core signaling component of the MAPK kinase cascade, is often mutated in various cancers, including melanoma, lung, and colorectal cancers. The approved inhibitors were focused on targeting the BRAFV600E mutation that results in constitutive activation of kinase signaling through the monomeric protein (Class I). However, these inhibitors also paradoxically activate kinase signaling of RAF dimers, resulting in increased MAPK signaling in normal tissues. Recently, significant attention has turned to targeting RAF alterations that activate dimeric signaling (class II and III BRAF and NRAS). However, the discovery of a potent and selective inhibitor with biopharmaceutical properties suitable to sustain robust target inhibition in the clinical setting has proven challenging. Herein, we report the discovery of exarafenib (15), a highly potent and selective inhibitor that intercepts the RAF protein in the dimer compatible αC-helix-IN conformation and demonstrates anti-tumor efficacy in preclinical models with BRAF class I, II, and III and NRAS alterations.
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Affiliation(s)
- Young K Chen
- Kinnate Biopharma, 12830 El Camino Real, Suite 150, San Diego, California 92130, United States
| | - Toufike Kanouni
- Kinnate Biopharma, 12830 El Camino Real, Suite 150, San Diego, California 92130, United States
| | - Lee D Arnold
- Kinnate Biopharma, 12830 El Camino Real, Suite 150, San Diego, California 92130, United States
| | - Jason M Cox
- Kinnate Biopharma, 12830 El Camino Real, Suite 150, San Diego, California 92130, United States
| | - Elisabeth Gardiner
- Kinnate Biopharma, 12830 El Camino Real, Suite 150, San Diego, California 92130, United States
| | - Kathryn Grandinetti
- Kinnate Biopharma, 12830 El Camino Real, Suite 150, San Diego, California 92130, United States
| | - Ping Jiang
- Kinnate Biopharma, 12830 El Camino Real, Suite 150, San Diego, California 92130, United States
| | - Stephen W Kaldor
- Kinnate Biopharma, 12830 El Camino Real, Suite 150, San Diego, California 92130, United States
| | - Catherine Lee
- Kinnate Biopharma, 12830 El Camino Real, Suite 150, San Diego, California 92130, United States
| | - Chun Li
- Kinnate Biopharma, 12830 El Camino Real, Suite 150, San Diego, California 92130, United States
| | - Eric S Martin
- Kinnate Biopharma, 12830 El Camino Real, Suite 150, San Diego, California 92130, United States
| | - Nichol Miller
- Kinnate Biopharma, 12830 El Camino Real, Suite 150, San Diego, California 92130, United States
| | - Eric A Murphy
- Kinnate Biopharma, 12830 El Camino Real, Suite 150, San Diego, California 92130, United States
| | - Noel Timple
- Kinnate Biopharma, 12830 El Camino Real, Suite 150, San Diego, California 92130, United States
| | - John S Tyhonas
- Kinnate Biopharma, 12830 El Camino Real, Suite 150, San Diego, California 92130, United States
| | - Angie Vassar
- Kinnate Biopharma, 12830 El Camino Real, Suite 150, San Diego, California 92130, United States
| | - Tim S Wang
- Kinnate Biopharma, 12830 El Camino Real, Suite 150, San Diego, California 92130, United States
| | - Richard Williams
- Kinnate Biopharma, 12830 El Camino Real, Suite 150, San Diego, California 92130, United States
| | - Ding Yuan
- Kinnate Biopharma, 12830 El Camino Real, Suite 150, San Diego, California 92130, United States
| | - Robert S Kania
- Kinnate Biopharma, 12830 El Camino Real, Suite 150, San Diego, California 92130, United States
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38
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Gritsch D, Santagata S, Brastianos PK. Integrating Systemic Therapies into the Multimodality Therapy of Patients with Craniopharyngioma. Curr Treat Options Oncol 2024; 25:261-273. [PMID: 38300480 PMCID: PMC11203386 DOI: 10.1007/s11864-023-01156-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/22/2023] [Indexed: 02/02/2024]
Abstract
OPINION STATEMENT The integration of targeted therapy into the multimodal management of craniopharyngiomas represents a significant advancement in the field of neuro-oncology. Historically, the management of these tumors has been challenging due to their proximity to vital brain structures, necessitating a delicate balance between tumor control and the preservation of neurological function. Traditional treatment modalities, such as surgical resection and radiation, while effective, carry their own set of risks, including potential damage to surrounding healthy tissues and the potential for long-term side effects. Recent insights into the molecular biology of craniopharyngiomas, particularly the discovery of the BRAF V600E mutation in nearly all papillary craniopharyngiomas, have paved the way for a targeted systemic treatment approach. However, advances have been limited for adamantinomatous craniopharyngiomas. The success of BRAF/MEK inhibitors in clinical trials underscores the potential of these targeted therapies not only to control tumor growth but also to reduce the need for more invasive treatments, potentially minimizing treatment-related complications. However, the introduction of these novel therapies also brings forth new challenges, such as determining the optimal timing, sequencing, and duration of targeted treatments. Furthermore, there are open questions regarding which specific BRAF/MEK inhibitors to use, the potential need for combination therapy, and the strategies for managing intolerable adverse events. Finally, ensuring equitable access to these therapies, especially in healthcare systems with limited resources, is crucial to prevent widening healthcare disparities. In conclusion, targeted therapy with BRAF/MEK inhibitors holds great promise for improving outcomes and quality of life for patients with BRAF-mutated craniopharyngiomas. However, additional research is needed to address the questions that remain about its optimal use and integration into comprehensive treatment plans.
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Affiliation(s)
- David Gritsch
- Massachusetts General Hospital Cancer Center, Harvard Medical School, 55 Fruit Street, Boston, MA, 02114, USA
| | - Sandro Santagata
- Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, 75 Francis Street, Boston, MA, 02115, USA
| | - Priscilla K Brastianos
- Massachusetts General Hospital Cancer Center, Harvard Medical School, 55 Fruit Street, Boston, MA, 02114, USA.
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Rehman S, Venna P, Davis S, Gopagoni R, Uttam R, Farrukh AM, Salehi M. Primary gallbladder melanoma: A systematic review of literature. Ann Diagn Pathol 2024; 68:152244. [PMID: 38103326 DOI: 10.1016/j.anndiagpath.2023.152244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Revised: 12/06/2023] [Accepted: 12/07/2023] [Indexed: 12/19/2023]
Abstract
Primary gallbladder melanoma (PGM) is a rare malignancy with only sporadic cases reported in the English literature. We performed a systematic review of the cases published in the PubMed, Science Direct and Google Scholar databases with the aim of describing the reported clinicopathologic features of PGM. Thirty-six articles reporting on 39 patients were reviewed. There was a male predominance, with 23 (64 %) of 36 patients being males. The mean age at presentation was 55 ±16 years. Pain in the right upper quadrant was reported in 20/27 (74 %). The average size of the tumor was 3.5 × 1.9 × 1.4 cm. Gallbladder calculi were reported in 7/27 (26 %). A cholecystectomy was performed in 34/38 (89.5 %). Grossly, the tumor mostly (96.5 %) had polypoid appearances and on microscopic examination, the tumor were predominantly comprised of epithelioid cells 12/17 (70.6 %). Mitotic figures and prominent nucleoli were reportedly found in 8/8 (100 %) and 3/3 (100 %) respectively. Junctional melanocytic components were present in 13/21 (61.9 %). Tumor cells were reportedly immunoreactive for S-100 and HMB-45 in all tested cases. Metastasis were reported in 25/36 (69.4 %), with lymph nodes being the most common site (n = 8), followed by brain (n = 6) and liver (n = 4) for metastasis. At a mean follow-up period of 19 +/- 3 months, 16 (48.5 %) of the 33 patients with available survival data were alive and 17/33 (51.5 %) were dead of disease. There is a lack of unified criteria for the diagnosis of PGM, and future studies should aim to resolve this.
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Affiliation(s)
| | | | | | | | - Ritika Uttam
- JJM Medical College, Davangere, Karnataka, India
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40
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Dailah HG, Hommdi AA, Koriri MD, Algathlan EM, Mohan S. Potential role of immunotherapy and targeted therapy in the treatment of cancer: A contemporary nursing practice. Heliyon 2024; 10:e24559. [PMID: 38298714 PMCID: PMC10828696 DOI: 10.1016/j.heliyon.2024.e24559] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2023] [Revised: 01/09/2024] [Accepted: 01/10/2024] [Indexed: 02/02/2024] Open
Abstract
Immunotherapy and targeted therapy have emerged as promising therapeutic options for cancer patients. Immunotherapies induce a host immune response that mediates long-lived tumor destruction, while targeted therapies suppress molecular mechanisms that are important for tumor maintenance and growth. In addition, cytotoxic agents and targeted therapies regulate immune responses, which increases the chances that these therapeutic approaches may be efficiently combined with immunotherapy to ameliorate clinical outcomes. Various studies have suggested that combinations of therapies that target different stages of anti-tumor immunity may be synergistic, which can lead to potent and more prolonged responses that can achieve long-lasting tumor destruction. Nurses associated with cancer patients should have a better understanding of the immunotherapies and targeted therapies, such as their efficacy profiles, mechanisms of action, as well as management and prophylaxis of adverse events. Indeed, this knowledge will be important in establishing care for cancer patients receiving immunotherapies and targeted therapies for cancer treatment. Moreover, nurses need a better understanding regarding targeted therapies and immunotherapies to ameliorate outcomes in patients receiving these therapies, as well as management and early detection of possible adverse effects, especially adverse events associated with checkpoint inhibitors and various other therapies that control T-cell activation causing autoimmune toxicity. Nurses practice in numerous settings, such as hospitals, home healthcare agencies, radiation therapy facilities, ambulatory care clinics, and community agencies. Therefore, as compared to other members of the healthcare team, nurses often have better opportunities to develop the essential rapport in providing effective nurse-led patient education, which is important for effective therapeutic outcomes and continuance of therapy. In this article, we have particularly focused on providing a detailed overview on targeted therapies and immunotherapies used in cancer treatment, management of their associated adverse events, and the impact as well as strategies of nurse-led patient education.
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Affiliation(s)
- Hamad Ghaleb Dailah
- Research and Scientific Studies Unit, College of Nursing, Jazan University, Jazan, 45142, Saudi Arabia
| | - Abdullah Abdu Hommdi
- Research and Scientific Studies Unit, College of Nursing, Jazan University, Jazan, 45142, Saudi Arabia
| | - Mahdi Dafer Koriri
- Research and Scientific Studies Unit, College of Nursing, Jazan University, Jazan, 45142, Saudi Arabia
| | - Essa Mohammed Algathlan
- Research and Scientific Studies Unit, College of Nursing, Jazan University, Jazan, 45142, Saudi Arabia
| | - Syam Mohan
- Substance Abuse and Toxicology Research Centre, Jazan University, Jazan, Saudi Arabia
- Center for Global Health Research, Saveetha Medical College and Hospitals, Saveetha Institute of Medical and Technical Sciences, Saveetha University, India
- School of Health Sciences, University of Petroleum and Energy Studies, Dehradun, Uttarakhand, India
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41
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Adamopoulos C, Cave DD, Papavassiliou AG. Inhibition of the RAF/MEK/ERK Signaling Cascade in Pancreatic Cancer: Recent Advances and Future Perspectives. Int J Mol Sci 2024; 25:1631. [PMID: 38338909 PMCID: PMC10855714 DOI: 10.3390/ijms25031631] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 01/22/2024] [Accepted: 01/26/2024] [Indexed: 02/12/2024] Open
Abstract
Pancreatic cancer represents a formidable challenge in oncology, primarily due to its aggressive nature and limited therapeutic options. The prognosis of patients with pancreatic ductal adenocarcinoma (PDAC), the main form of pancreatic cancer, remains disappointingly poor with a 5-year overall survival of only 5%. Almost 95% of PDAC patients harbor Kirsten rat sarcoma virus (KRAS) oncogenic mutations. KRAS activates downstream intracellular pathways, most notably the rapidly accelerated fibrosarcoma (RAF)/mitogen-activated protein kinase kinase (MEK)/extracellular signal-regulated kinase (ERK) signaling axis. Dysregulation of the RAF/MEK/ERK pathway is a crucial feature of pancreatic cancer and therefore its main components, RAF, MEK and ERK kinases, have been targeted pharmacologically, largely by small-molecule inhibitors. The recent advances in the development of inhibitors not only directly targeting the RAF/MEK/ERK pathway but also indirectly through inhibition of its regulators, such as Src homology-containing protein tyrosine phosphatase 2 (SHP2) and Son of sevenless homolog 1 (SOS1), provide new therapeutic opportunities. Moreover, the discovery of allele-specific small-molecule inhibitors against mutant KRAS variants has brought excitement for successful innovations in the battle against pancreatic cancer. Herein, we review the recent advances in targeted therapy and combinatorial strategies with focus on the current preclinical and clinical approaches, providing critical insight, underscoring the potential of these efforts and supporting their promise to improve the lives of patients with PDAC.
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Affiliation(s)
- Christos Adamopoulos
- Department of Biological Chemistry, Medical School, National and Kapodistrian University of Athens, 11527 Athens, Greece;
- Department of Oncological Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Donatella Delle Cave
- Institute of Genetics and Biophysics ‘Adriano Buzzati-Traverso’, CNR, 80131 Naples, Italy
| | - Athanasios G. Papavassiliou
- Department of Biological Chemistry, Medical School, National and Kapodistrian University of Athens, 11527 Athens, Greece;
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42
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Yvone GM, Breunig JJ. Pediatric low-grade glioma models: advances and ongoing challenges. Front Oncol 2024; 13:1346949. [PMID: 38318325 PMCID: PMC10839015 DOI: 10.3389/fonc.2023.1346949] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Accepted: 12/29/2023] [Indexed: 02/07/2024] Open
Abstract
Pediatric low-grade gliomas represent the most common childhood brain tumor class. While often curable, some tumors fail to respond and even successful treatments can have life-long side effects. Many clinical trials are underway for pediatric low-grade gliomas. However, these trials are expensive and challenging to organize due to the heterogeneity of patients and subtypes. Advances in sequencing technologies are helping to mitigate this by revealing the molecular landscapes of mutations in pediatric low-grade glioma. Functionalizing these mutations in the form of preclinical models is the next step in both understanding the disease mechanisms as well as for testing therapeutics. However, such models are often more difficult to generate due to their less proliferative nature, and the heterogeneity of tumor microenvironments, cell(s)-of-origin, and genetic alterations. In this review, we discuss the molecular and genetic alterations and the various preclinical models generated for the different types of pediatric low-grade gliomas. We examined the different preclinical models for pediatric low-grade gliomas, summarizing the scientific advances made to the field and therapeutic implications. We also discuss the advantages and limitations of the various models. This review highlights the importance of preclinical models for pediatric low-grade gliomas while noting the challenges and future directions of these models to improve therapeutic outcomes of pediatric low-grade gliomas.
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Affiliation(s)
- Griselda Metta Yvone
- Board of Governors Regenerative Medicine Institute, Cedars-Sinai Medical Center, Los Angeles, CA, United States
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA, United States
| | - Joshua J. Breunig
- Board of Governors Regenerative Medicine Institute, Cedars-Sinai Medical Center, Los Angeles, CA, United States
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA, United States
- Center for Neural Sciences in Medicine, Cedars-Sinai Medical Center, Los Angeles, CA, United States
- Samuel Oschin Comprehensive Cancer Institute, Cedars-Sinai Medical Center, Los Angeles, CA, United States
- Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, United States
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43
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Trebino TE, Markusic B, Nan H, Banerjee S, Wang Z. Unveiling the domain-specific and RAS isoform-specific details of BRAF kinase regulation. eLife 2023; 12:RP88836. [PMID: 38150000 PMCID: PMC10752582 DOI: 10.7554/elife.88836] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2023] Open
Abstract
BRAF is a key member in the MAPK signaling pathway essential for cell growth, proliferation, and differentiation. Mutant BRAF is often the underlying cause of various types of cancer and mutant RAS, the upstream regulator of BRAF, is a driver of up to one-third of all cancers. BRAF interacts with RAS and undergoes a conformational change from an inactive, autoinhibited monomer to an active dimer, which propagates downstream signaling. Because of BRAF's complex regulation mechanism, the exact order and magnitude of its activation steps have yet to be confirmed experimentally. By studying the inter- and intramolecular interactions of BRAF, we unveil the domain-specific and isoform-specific details of BRAF regulation through pulldown assays, open surface plasmon resonance (OpenSPR), and hydrogen-deuterium exchange mass spectrometry (HDX-MS). We demonstrate that the BRAF specific region (BSR) and cysteine rich domain (CRD) play a crucial role in regulating the activation of BRAF in a RAS isoform-specific manner. Moreover, we quantified the binding affinities between BRAF N-terminal and kinase domains (KD) to reveal their individual roles in autoinhibition. Our findings also indicate that oncogenic BRAF-KDD594G mutant has a lower affinity for the N-terminal domains, implicating that pathogenic BRAF acts through decreased propensity for autoinhibition. Collectively, our study provides valuable insight into the activation mechanism of BRAF kinase to guide the development of new therapeutic strategies for cancer treatment.
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Affiliation(s)
| | - Borna Markusic
- Rowan UniversityGlassboroUnited States
- Max Planck Institute of BiophysicsFrankfurt am MainGermany
| | - Haihan Nan
- Rowan UniversityGlassboroUnited States
- School of Laboratory Medicine and Life Science, Wenzhou Medical UniversityWenzhouChina
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44
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Bahar ME, Kim HJ, Kim DR. Targeting the RAS/RAF/MAPK pathway for cancer therapy: from mechanism to clinical studies. Signal Transduct Target Ther 2023; 8:455. [PMID: 38105263 PMCID: PMC10725898 DOI: 10.1038/s41392-023-01705-z] [Citation(s) in RCA: 20] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Revised: 11/03/2023] [Accepted: 11/12/2023] [Indexed: 12/19/2023] Open
Abstract
Metastatic dissemination of solid tumors, a leading cause of cancer-related mortality, underscores the urgent need for enhanced insights into the molecular and cellular mechanisms underlying metastasis, chemoresistance, and the mechanistic backgrounds of individuals whose cancers are prone to migration. The most prevalent signaling cascade governed by multi-kinase inhibitors is the mitogen-activated protein kinase (MAPK) pathway, encompassing the RAS-RAF-MAPK kinase (MEK)-extracellular signal-related kinase (ERK) pathway. RAF kinase is a primary mediator of the MAPK pathway, responsible for the sequential activation of downstream targets, such as MEK and the transcription factor ERK, which control numerous cellular and physiological processes, including organism development, cell cycle control, cell proliferation and differentiation, cell survival, and death. Defects in this signaling cascade are associated with diseases such as cancer. RAF inhibitors (RAFi) combined with MEK blockers represent an FDA-approved therapeutic strategy for numerous RAF-mutant cancers, including melanoma, non-small cell lung carcinoma, and thyroid cancer. However, the development of therapy resistance by cancer cells remains an important barrier. Autophagy, an intracellular lysosome-dependent catabolic recycling process, plays a critical role in the development of RAFi resistance in cancer. Thus, targeting RAF and autophagy could be novel treatment strategies for RAF-mutant cancers. In this review, we delve deeper into the mechanistic insights surrounding RAF kinase signaling in tumorigenesis and RAFi-resistance. Furthermore, we explore and discuss the ongoing development of next-generation RAF inhibitors with enhanced therapeutic profiles. Additionally, this review sheds light on the functional interplay between RAF-targeted therapies and autophagy in cancer.
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Affiliation(s)
- Md Entaz Bahar
- Department of Biochemistry and Convergence Medical Sciences and Institute of Medical Science, Gyeongsang National University, College of Medicine, Jinju, South Korea
| | - Hyun Joon Kim
- Department of Anatomy and Convergence Medical Sciences and Institute of Medical Science, Gyeongsang National University, College of Medicine, Jinju, South Korea
| | - Deok Ryong Kim
- Department of Biochemistry and Convergence Medical Sciences and Institute of Medical Science, Gyeongsang National University, College of Medicine, Jinju, South Korea.
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45
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Ta L, Tsai BL, Deng W, Sha J, Varuzhanyan G, Tran W, Wohlschlegel JA, Carr-Ascher JR, Witte ON. Wild-type C-Raf gene dosage and dimerization drive prostate cancer metastasis. iScience 2023; 26:108480. [PMID: 38089570 PMCID: PMC10711388 DOI: 10.1016/j.isci.2023.108480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Revised: 10/04/2023] [Accepted: 11/15/2023] [Indexed: 02/01/2024] Open
Abstract
Mutated Ras and Raf kinases are well-known to promote cancer metastasis via flux through the Ras/Raf/MEK/ERK (mitogen-activated protein kinase [MAPK]) pathway. A role for non-mutated Raf in metastasis is also emerging, but the key mechanisms remain unclear. Elevated expression of any of the three wild-type Raf family members (C, A, or B) can drive metastasis. We utilized an in vivo model to show that wild-type C-Raf overexpression can promote metastasis of immortalized prostate cells in a gene dosage-dependent manner. Analysis of the transcriptomic and phosphoproteomic landscape indicated that C-Raf-driven metastasis is accompanied by upregulated MAPK signaling. Use of C-Raf mutants demonstrated that the dimerization domain, but not its kinase activity, is essential for metastasis. Endogenous Raf monomer knockouts revealed that C-Raf's ability to form dimers with endogenous Raf molecules is important for promoting metastasis. These data identify wild-type C-Raf heterodimer signaling as a potential target for treating metastatic disease.
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Affiliation(s)
- Lisa Ta
- Department of Molecular and Medical Pharmacology, University of California, Los Angeles; Los Angeles, CA 90095, USA
| | - Brandon L. Tsai
- Department of Human Genetics, University of California, Los Angeles; Los Angeles, CA 90095, USA
| | - Weixian Deng
- Department of Biological Chemistry, David Geffen School of Medicine, University of California, Los Angeles; Los Angeles, CA 90095, USA
| | - Jihui Sha
- Department of Biological Chemistry, David Geffen School of Medicine, University of California, Los Angeles; Los Angeles, CA 90095, USA
| | - Grigor Varuzhanyan
- Department of Microbiology, Immunology, and Molecular Genetics, University of California, Los Angeles; Los Angeles, CA 90095, USA
| | - Wendy Tran
- Department of Microbiology, Immunology, and Molecular Genetics, University of California, Los Angeles; Los Angeles, CA 90095, USA
| | - James A. Wohlschlegel
- Department of Biological Chemistry, David Geffen School of Medicine, University of California, Los Angeles; Los Angeles, CA 90095, USA
| | - Janai R. Carr-Ascher
- Department of Internal Medicine, Division of Hematology/Oncology, University of California, Davis, Sacramento, CA 95817, USA
- Department of Orthopedic Surgery, University of California, Davis; Sacramento, CA 95817, USA
| | - Owen N. Witte
- Department of Molecular and Medical Pharmacology, University of California, Los Angeles; Los Angeles, CA 90095, USA
- Department of Microbiology, Immunology, and Molecular Genetics, University of California, Los Angeles; Los Angeles, CA 90095, USA
- Molecular Biology Institute, University of California, Los Angeles; Los Angeles, CA 90095, USA
- Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, University of California, Los Angeles, Los Angeles, CA 90095, USA
- Jonsson Comprehensive Cancer Center, University of California, Los Angeles; Los Angeles, CA 90095, USA
- Parker Institute for Cancer Immunotherapy, University of California, Los Angeles; Los Angeles, CA 90095, USA
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46
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Ram A, Murphy D, DeCuzzi N, Patankar M, Hu J, Pargett M, Albeck JG. A guide to ERK dynamics, part 2: downstream decoding. Biochem J 2023; 480:1909-1928. [PMID: 38038975 PMCID: PMC10754290 DOI: 10.1042/bcj20230277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2023] [Revised: 11/03/2023] [Accepted: 11/09/2023] [Indexed: 12/02/2023]
Abstract
Signaling by the extracellular signal-regulated kinase (ERK) pathway controls many cellular processes, including cell division, death, and differentiation. In this second installment of a two-part review, we address the question of how the ERK pathway exerts distinct and context-specific effects on multiple processes. We discuss how the dynamics of ERK activity induce selective changes in gene expression programs, with insights from both experiments and computational models. With a focus on single-cell biosensor-based studies, we summarize four major functional modes for ERK signaling in tissues: adjusting the size of cell populations, gradient-based patterning, wave propagation of morphological changes, and diversification of cellular gene expression states. These modes of operation are disrupted in cancer and other related diseases and represent potential targets for therapeutic intervention. By understanding the dynamic mechanisms involved in ERK signaling, there is potential for pharmacological strategies that not only simply inhibit ERK, but also restore functional activity patterns and improve disease outcomes.
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Affiliation(s)
- Abhineet Ram
- Department of Molecular and Cellular Biology, University of California, Davis, CA, U.S.A
| | - Devan Murphy
- Department of Molecular and Cellular Biology, University of California, Davis, CA, U.S.A
| | - Nicholaus DeCuzzi
- Department of Molecular and Cellular Biology, University of California, Davis, CA, U.S.A
| | - Madhura Patankar
- Department of Molecular and Cellular Biology, University of California, Davis, CA, U.S.A
| | - Jason Hu
- Department of Molecular and Cellular Biology, University of California, Davis, CA, U.S.A
| | - Michael Pargett
- Department of Molecular and Cellular Biology, University of California, Davis, CA, U.S.A
| | - John G. Albeck
- Department of Molecular and Cellular Biology, University of California, Davis, CA, U.S.A
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47
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Siljamäki E, Riihilä P, Suwal U, Nissinen L, Rappu P, Kallajoki M, Kähäri VM, Heino J. Inhibition of TGF-β signaling, invasion, and growth of cutaneous squamous cell carcinoma by PLX8394. Oncogene 2023; 42:3633-3647. [PMID: 37864034 PMCID: PMC10691969 DOI: 10.1038/s41388-023-02863-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Revised: 09/28/2023] [Accepted: 10/04/2023] [Indexed: 10/22/2023]
Abstract
Cutaneous squamous cell carcinoma (cSCC) is the most common metastatic skin cancer. The prognosis of patients with metastatic cSCC is poor emphasizing the need for new therapies. We have previously reported that the activation of Ras/MEK/ERK1/2 and transforming growth factor β (TGF-β)/Smad2 signaling in transformed keratinocytes and cSCC cells leads to increased accumulation of laminin-332 and accelerated invasion. Here, we show that the next-generation B-Raf inhibitor PLX8394 blocks TGF-β signaling in ras-transformed metastatic epidermal keratinocytes (RT3 cells) harboring wild-type B-Raf and hyperactive Ras. PLX8394 decreased phosphorylation of TGF-β receptor II and Smad2, as well as p38 activity, MMP-1 and MMP-13 synthesis, and laminin-332 accumulation. PLX8394 significantly inhibited the growth of human cSCC tumors and in vivo collagen degradation in xenograft model. In conclusion, our data indicate that PLX8394 inhibits several serine-threonine kinases in malignantly transformed human keratinocytes and cSCC cells and inhibits cSCC invasion and tumor growth in vitro and in vivo. We identify PLX8394 as a potential therapeutic compound for advanced human cSCC.
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Affiliation(s)
- Elina Siljamäki
- MediCity Research Laboratory, University of Turku, Tykistökatu 6A, FI-20520, Turku, Finland
- Department of Life Technologies and InFLAMES Research Flagship, University of Turku, FI-20014, Turku, Finland
| | - Pilvi Riihilä
- Department of Dermatology, University of Turku and Turku University Hospital, Hämeentie 11 TE6, FI-20520, Turku, Finland
- FICAN West Cancer Research Laboratory, University of Turku and Turku University Hospital, Kiinamyllynkatu 10, FI-20520, Turku, Finland
| | - Ujjwal Suwal
- MediCity Research Laboratory, University of Turku, Tykistökatu 6A, FI-20520, Turku, Finland
- Department of Life Technologies and InFLAMES Research Flagship, University of Turku, FI-20014, Turku, Finland
| | - Liisa Nissinen
- Department of Dermatology, University of Turku and Turku University Hospital, Hämeentie 11 TE6, FI-20520, Turku, Finland
- FICAN West Cancer Research Laboratory, University of Turku and Turku University Hospital, Kiinamyllynkatu 10, FI-20520, Turku, Finland
| | - Pekka Rappu
- MediCity Research Laboratory, University of Turku, Tykistökatu 6A, FI-20520, Turku, Finland
- Department of Life Technologies and InFLAMES Research Flagship, University of Turku, FI-20014, Turku, Finland
| | - Markku Kallajoki
- Department of Pathology, University of Turku and Turku University Hospital, Kiinamyllynkatu 10, FI-20520, Turku, Finland
| | - Veli-Matti Kähäri
- Department of Dermatology, University of Turku and Turku University Hospital, Hämeentie 11 TE6, FI-20520, Turku, Finland.
- FICAN West Cancer Research Laboratory, University of Turku and Turku University Hospital, Kiinamyllynkatu 10, FI-20520, Turku, Finland.
| | - Jyrki Heino
- MediCity Research Laboratory, University of Turku, Tykistökatu 6A, FI-20520, Turku, Finland.
- Department of Life Technologies and InFLAMES Research Flagship, University of Turku, FI-20014, Turku, Finland.
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48
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Shen X, Niu N, Xue J. Oncogenic KRAS triggers metabolic reprogramming in pancreatic ductal adenocarcinoma. J Transl Int Med 2023; 11:322-329. [PMID: 38130635 PMCID: PMC10732496 DOI: 10.2478/jtim-2022-0022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Pancreatic ductal adenocarcinoma (PDAC) is a devastating disease with an extremely high lethality rate. Oncogenic KRAS activation has been proven to be a key driver of PDAC initiation and progression. There is increasing evidence that PDAC cells undergo extensive metabolic reprogramming to adapt to their extreme energy and biomass demands. Cell-intrinsic factors, such as KRAS mutations, are able to trigger metabolic rewriting. Here, we update recent advances in KRAS-driven metabolic reprogramming and the associated metabolic therapeutic potential in PDAC.
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Affiliation(s)
- Xuqing Shen
- State Key Laboratory of Oncogenes and Related Genes, Stem Cell Research Center, Ren Ji Hospital, School of Medicine, Shanghai Cancer Institute, Shanghai Jiao Tong University, Shanghai200127, China
| | - Ningning Niu
- State Key Laboratory of Oncogenes and Related Genes, Stem Cell Research Center, Ren Ji Hospital, School of Medicine, Shanghai Cancer Institute, Shanghai Jiao Tong University, Shanghai200127, China
| | - Jing Xue
- State Key Laboratory of Oncogenes and Related Genes, Stem Cell Research Center, Ren Ji Hospital, School of Medicine, Shanghai Cancer Institute, Shanghai Jiao Tong University, Shanghai200127, China
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49
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Dalby KN. Raf protomers: Drug binding preferences in living cells. Cell Chem Biol 2023; 30:1329-1331. [PMID: 37977126 PMCID: PMC10954368 DOI: 10.1016/j.chembiol.2023.10.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Revised: 10/08/2023] [Accepted: 10/09/2023] [Indexed: 11/19/2023]
Abstract
The precise and selective quantification of drug-target interactions within the context of RAS-RAF heterodimers in live cells offers a powerful tool for drug development and personalized medicine, particularly in cancer research, where the RAS-RAF pathway is pivotal.
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Affiliation(s)
- Kevin N Dalby
- Division of Chemical Biology and Medicinal Chemistry, The University of Texas at Austin, Austin, TX 78712, USA.
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Vasta JD, Michaud A, Zimprich CA, Beck MT, Swiatnicki MR, Zegzouti H, Thomas MR, Wilkinson J, Crapster JA, Robers MB. Protomer selectivity of type II RAF inhibitors within the RAS/RAF complex. Cell Chem Biol 2023; 30:1354-1365.e6. [PMID: 37643616 DOI: 10.1016/j.chembiol.2023.07.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Revised: 05/12/2023] [Accepted: 07/31/2023] [Indexed: 08/31/2023]
Abstract
RAF dimer inhibitors offer therapeutic potential in RAF- and RAS-driven cancers. The utility of such drugs is predicated on their capacity to occupy both RAF protomers in the RAS-RAF signaling complex. Here we describe a method to conditionally quantify drug-target occupancy at selected RAF protomers within an active RAS-RAF complex in cells. RAF target engagement can be measured in the presence or absence of any mutant KRAS allele, enabling the high-affinity state of RAF dimer inhibitors to be quantified in the cellular milieu. The intracellular protomer selectivity of clinical-stage type II RAF inhibitors revealed that ARAF protomer engagement, but not engagement of BRAF or CRAF, is commensurate with inhibition of MAPK signaling in various mutant RAS cell lines. Our results support a fundamental role for ARAF in mutant RAS signaling and reveal poor ARAF protomer vulnerability for a cohort of RAF inhibitors undergoing clinical evaluation.
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