1
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Gupta A, Purohit R. Identification of potent BRD4-BD1 inhibitors using classical and steered molecular dynamics based free energy analysis. J Cell Biochem 2024; 125:e30532. [PMID: 38317535 DOI: 10.1002/jcb.30532] [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: 11/07/2023] [Revised: 01/08/2024] [Accepted: 01/26/2024] [Indexed: 02/07/2024]
Abstract
In the present work a combination of traditional and steered molecular dynamics based techniques were employed to identify potential inhibitors against the human BRD4 protein (BRD4- BD1); an established drug target for multiple illnesses including various malignancies. Quinoline derivatives that were synthesized in-house were tested for their potential as new BRD4-BD1 inhibitors. Initially molecular docking experiments were performed to determine the binding poses of BRD4-BD1 inhibitors. To learn more about the thermodynamics of inhibitor binding to the BRD4-BD1 active site, the Molecular Mechanics Poisson-Boltzmann Surface Area (MM-PBSA) free energy calculations were conducted afterwards. The findings of the MM-PBSA analysis were further reinforced by performing steered umbrella sampling simulations which revealed crucial details about the binding/unbinding process of the most potent quinoline derivatives at the BRD4-BD1 active site. We report a novel quinoline derivative which can be developed into a fully functional BRD4-BD1 inhibitor after experimental validation. The identified compound (4 g) shows better properties than the standard BRD4-BD1 inhibitors considered in the study. The study also highlights the crucial role of Gln78, Phe79, Trp81, Pro82, Phe83, Gln84, Gln85, Val87, Leu92, Leu94, Tyr97, Met105, Cys136, Asn140, Ile146 and Met149 in inhibitor binding. The study provides a possible lead candidate and key amino acids involved in inhibitor recognition and binding at the active site of BRD4-BD1 protein. The findings might be of significance to medicinal chemists involved in the development of potent BRD4-BD1 inhibitors.
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Affiliation(s)
- Ashish Gupta
- Structural Bioinformatics Lab, Biotechnology Division, CSIR-Institute of Himalayan Bioresource Technology (CSIR-IHBT), Palampur, India
| | - Rituraj Purohit
- Structural Bioinformatics Lab, Biotechnology Division, CSIR-Institute of Himalayan Bioresource Technology (CSIR-IHBT), Palampur, India
- Academy of Scientific & Innovative Research (AcSIR), Ghaziabad, India
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2
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Bauer N, Balourdas DI, Schneider JR, Zhang X, Berger LM, Berger BT, Schwalm MP, Klopp NA, Siveke JT, Knapp S, Joerger AC. Development of Potent Dual BET/HDAC Inhibitors via Pharmacophore Merging and Structure-Guided Optimization. ACS Chem Biol 2024; 19:266-279. [PMID: 38291964 PMCID: PMC10878397 DOI: 10.1021/acschembio.3c00427] [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: 07/20/2023] [Revised: 11/21/2023] [Accepted: 11/21/2023] [Indexed: 02/01/2024]
Abstract
Bromodomain and extra-terminal domain (BET) proteins and histone deacetylases (HDACs) are prime targets in cancer therapy. Recent research has particularly focused on the development of dual BET/HDAC inhibitors for hard-to-treat tumors, such as pancreatic cancer. Here, we developed a new series of potent dual BET/HDAC inhibitors by choosing starting scaffolds that enabled us to optimally merge the two functionalities into a single compound. Systematic structure-guided modification of both warheads then led to optimized binders that were superior in potency to both parent compounds, with the best molecules of this series binding to both BRD4 bromodomains as well as HDAC1/2 with EC50 values in the 100 nM range in cellular NanoBRET target engagement assays. For one of our lead molecules, we could also show the selective inhibition of HDAC1/2 over all other zinc-dependent HDACs. Importantly, this on-target activity translated into promising efficacy in pancreatic cancer and NUT midline carcinoma cells. Our lead molecules effectively blocked histone H3 deacetylation in pancreatic cancer cells and upregulated the tumor suppressor HEXIM1 and proapoptotic p57, both markers of BET inhibition. In addition, they have the potential to downregulate the oncogenic drivers of NUT midline carcinoma, as demonstrated for MYC and TP63 mRNA levels. Overall, this study expands the portfolio of available dual BET/class I HDAC inhibitors for future translational studies in different cancer models.
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Affiliation(s)
- Nicolas Bauer
- Institute
of Pharmaceutical Chemistry, Goethe University, Max-von-Laue-Str. 9, 60438 Frankfurt am Main, Germany
- Structural
Genomics Consortium (SGC), Buchmann Institute
for Life Sciences, Max-von-Laue-Str.
15, 60438 Frankfurt
am Main, Germany
| | - Dimitrios-Ilias Balourdas
- Institute
of Pharmaceutical Chemistry, Goethe University, Max-von-Laue-Str. 9, 60438 Frankfurt am Main, Germany
- Structural
Genomics Consortium (SGC), Buchmann Institute
for Life Sciences, Max-von-Laue-Str.
15, 60438 Frankfurt
am Main, Germany
| | - Joel R. Schneider
- Bridge
Institute of Experimental Tumor Therapy, West German Cancer Center,
University Hospital Essen, University of
Duisburg-Essen, 45147 Essen, Germany
- Division
of Solid Tumor Translational Oncology, German
Cancer Consortium (DKTK Partner Site Essen) and German Cancer Research
Center, DKFZ, 69120 Heidelberg, Germany
| | - Xin Zhang
- Bridge
Institute of Experimental Tumor Therapy, West German Cancer Center,
University Hospital Essen, University of
Duisburg-Essen, 45147 Essen, Germany
- Division
of Solid Tumor Translational Oncology, German
Cancer Consortium (DKTK Partner Site Essen) and German Cancer Research
Center, DKFZ, 69120 Heidelberg, Germany
| | - Lena M. Berger
- Institute
of Pharmaceutical Chemistry, Goethe University, Max-von-Laue-Str. 9, 60438 Frankfurt am Main, Germany
- Structural
Genomics Consortium (SGC), Buchmann Institute
for Life Sciences, Max-von-Laue-Str.
15, 60438 Frankfurt
am Main, Germany
| | - Benedict-Tilman Berger
- Institute
of Pharmaceutical Chemistry, Goethe University, Max-von-Laue-Str. 9, 60438 Frankfurt am Main, Germany
- Structural
Genomics Consortium (SGC), Buchmann Institute
for Life Sciences, Max-von-Laue-Str.
15, 60438 Frankfurt
am Main, Germany
| | - Martin P. Schwalm
- Institute
of Pharmaceutical Chemistry, Goethe University, Max-von-Laue-Str. 9, 60438 Frankfurt am Main, Germany
- Structural
Genomics Consortium (SGC), Buchmann Institute
for Life Sciences, Max-von-Laue-Str.
15, 60438 Frankfurt
am Main, Germany
- German
Translational Cancer Network (DKTK) Site Frankfurt/Mainz, Frankfurt am Main 60438, Germany
| | - Nick A. Klopp
- Bridge
Institute of Experimental Tumor Therapy, West German Cancer Center,
University Hospital Essen, University of
Duisburg-Essen, 45147 Essen, Germany
- Division
of Solid Tumor Translational Oncology, German
Cancer Consortium (DKTK Partner Site Essen) and German Cancer Research
Center, DKFZ, 69120 Heidelberg, Germany
| | - Jens T. Siveke
- Bridge
Institute of Experimental Tumor Therapy, West German Cancer Center,
University Hospital Essen, University of
Duisburg-Essen, 45147 Essen, Germany
- Division
of Solid Tumor Translational Oncology, German
Cancer Consortium (DKTK Partner Site Essen) and German Cancer Research
Center, DKFZ, 69120 Heidelberg, Germany
| | - Stefan Knapp
- Institute
of Pharmaceutical Chemistry, Goethe University, Max-von-Laue-Str. 9, 60438 Frankfurt am Main, Germany
- Structural
Genomics Consortium (SGC), Buchmann Institute
for Life Sciences, Max-von-Laue-Str.
15, 60438 Frankfurt
am Main, Germany
- German
Translational Cancer Network (DKTK) Site Frankfurt/Mainz, Frankfurt am Main 60438, Germany
| | - Andreas C. Joerger
- Institute
of Pharmaceutical Chemistry, Goethe University, Max-von-Laue-Str. 9, 60438 Frankfurt am Main, Germany
- Structural
Genomics Consortium (SGC), Buchmann Institute
for Life Sciences, Max-von-Laue-Str.
15, 60438 Frankfurt
am Main, Germany
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3
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Shirbhate E, Singh V, Jahoriya V, Mishra A, Veerasamy R, Tiwari AK, Rajak H. Dual inhibitors of HDAC and other epigenetic regulators: A novel strategy for cancer treatment. Eur J Med Chem 2024; 263:115938. [PMID: 37989059 DOI: 10.1016/j.ejmech.2023.115938] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2023] [Revised: 10/25/2023] [Accepted: 11/05/2023] [Indexed: 11/23/2023]
Abstract
A significant advancement in the field of epigenetic drug discovery has been evidenced in recent years. Epigenetic alterations are hereditary, nevertheless reversible variations to DNA or histone adaptations that regulate gene function individualistically of the fundamental sequence. The design and synthesis of various drugs targeting epigenetic regulators open a new door for epigenetic-targeted therapies to parade worthwhile therapeutic potential for haematological and solid malignancies. Several ongoing clinical trials on dual targeting strategy are being conducted comprising HDAC inhibitory component and an epigenetic regulating agent. In this perspective, the review discusses the pharmacological aspects of HDAC and other epigenetic regulating factors as dual inhibitors as an emerging alternative approach for combination therapies.
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Affiliation(s)
- Ekta Shirbhate
- Department of Pharmacy, Guru Ghasidas University, Bilaspur, 495 009, CG, India
| | - Vaibhav Singh
- Department of Pharmacy, Guru Ghasidas University, Bilaspur, 495 009, CG, India
| | - Varsha Jahoriya
- Department of Pharmacy, Guru Ghasidas University, Bilaspur, 495 009, CG, India
| | - Aditya Mishra
- Department of Pharmacy, Guru Ghasidas University, Bilaspur, 495 009, CG, India
| | - Ravichandran Veerasamy
- Faculty of Pharmacy, AIMST University, Semeling, 08100, Bedong, Kedah Darul Aman, Malaysia
| | - Amit K Tiwari
- Cancer & System Therapeutics, UAMS College of Pharmacy, UAMS - University of Arkansas for Medical Sciences, AR, United States
| | - Harish Rajak
- Department of Pharmacy, Guru Ghasidas University, Bilaspur, 495 009, CG, India.
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4
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Wahi A, Manchanda N, Jain P, Jadhav HR. Targeting the epigenetic reader "BET" as a therapeutic strategy for cancer. Bioorg Chem 2023; 140:106833. [PMID: 37683545 DOI: 10.1016/j.bioorg.2023.106833] [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: 07/04/2023] [Revised: 08/22/2023] [Accepted: 08/30/2023] [Indexed: 09/10/2023]
Abstract
Bromodomain and extraterminal (BET) proteins have the ability to bind to acetylated lysine residues present in both histones and non-histone proteins. This binding is facilitated by the presence of tandem bromodomains. The regulatory role of BET proteins extends to chromatin dynamics, cellular processes, and disease progression. The BET family comprises of BRD 2, 3, 4 and BRDT. The BET proteins are a class of epigenetic readers that regulate the transcriptional activity of a multitude of genes that are involved in the pathogenesis of cancer. Thus, targeting BET proteins has been identified as a potentially efficacious approach for the treatment of cancer. BET inhibitors (BETis) are known to interfere with the binding of BET proteins to acetylated lysine residues of chromatin, thereby leading to the suppression of transcription of several genes, including oncogenic transcription factors. Here in this review, we focus on role of Bromodomain and extra C-terminal (BET) proteins in cancer progression. Furthermore, numerous small-molecule inhibitors with pan-BET activity have been documented, with certain compounds currently undergoing clinical assessment. However, it is apparent that the clinical effectiveness of the present BET inhibitors is restricted, prompting the exploration of novel technologies to enhance their clinical outcomes and mitigate undesired adverse effects. Thus, strategies like development of selective BET-BD1, & BD2 inhibitors, dual and acting BET are also presented in this review and attempts to cover the chemistry needed for proper establishment of designed molecules into BRD have been made. Moreover, the review attempts to summarize the details of research till date and proposes a space for future development of BET inhibitor with diminished side effects. It can be concluded that discovery of isoform selective BET inhibitors can be a way forward in order to develop BET inhibitors with negligible side effects.
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Affiliation(s)
- Abhishek Wahi
- Department of Pharmaceutical Chemistry, School of Pharmaceutical Sciences, Delhi Pharmaceutical Sciences and Research University, Govt. of NCT of Delhi, Delhi, New Delhi 110017, India
| | - Namish Manchanda
- Department of Pharmaceutical Chemistry, School of Pharmaceutical Sciences, Delhi Pharmaceutical Sciences and Research University, Govt. of NCT of Delhi, Delhi, New Delhi 110017, India
| | - Priti Jain
- Department of Pharmaceutical Chemistry, School of Pharmaceutical Sciences, Delhi Pharmaceutical Sciences and Research University, Govt. of NCT of Delhi, Delhi, New Delhi 110017, India.
| | - Hemant R Jadhav
- Department of Pharmacy, Birla Institute of Technology and Science, Pilani-Pilani Campus, Vidya Vihar Pilani, Rajasthan 333031, India
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5
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König B, Watson PR, Reßing N, Cragin AD, Schäker-Hübner L, Christianson DW, Hansen FK. Difluoromethyl-1,3,4-oxadiazoles Are Selective, Mechanism-Based, and Essentially Irreversible Inhibitors of Histone Deacetylase 6. J Med Chem 2023; 66:13821-13837. [PMID: 37782298 PMCID: PMC10591924 DOI: 10.1021/acs.jmedchem.3c01345] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/03/2023]
Abstract
Histone deacetylase 6 (HDAC6) is an important drug target in oncological and non-oncological diseases. Most available HDAC6 inhibitors (HDAC6i) utilize hydroxamic acids as a zinc-binding group, which limits therapeutic opportunities due to its genotoxic potential. Recently, difluoromethyl-1,3,4-oxadiazoles (DFMOs) were reported as potent and selective HDAC6i but their mode of inhibition remained enigmatic. Herein, we report that DFMOs act as mechanism-based and essentially irreversible HDAC6i. Biochemical data confirm that DFMO 6 is a tight-binding HDAC6i capable of inhibiting HDAC6 via a two-step slow-binding mechanism. Crystallographic and mechanistic experiments suggest that the attack of 6 by the zinc-bound water at the sp2 carbon closest to the difluoromethyl moiety followed by a subsequent ring opening of the oxadiazole yields deprotonated difluoroacetylhydrazide 13 as active species. The strong anionic zinc coordination of 13 and the binding of the difluoromethyl moiety in the P571 pocket finally result in an essentially irreversible inhibition of HDAC6.
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Affiliation(s)
- Beate König
- Department of Pharmaceutical and Cell Biological Chemistry, Pharmaceutical Institute, University of Bonn, An der Immenburg 4, Bonn 53121, Germany
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
| | - Paris R Watson
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
| | - Nina Reßing
- Department of Pharmaceutical and Cell Biological Chemistry, Pharmaceutical Institute, University of Bonn, An der Immenburg 4, Bonn 53121, Germany
| | - Abigail D Cragin
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
| | - Linda Schäker-Hübner
- Department of Pharmaceutical and Cell Biological Chemistry, Pharmaceutical Institute, University of Bonn, An der Immenburg 4, Bonn 53121, Germany
| | - David W Christianson
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
| | - Finn K Hansen
- Department of Pharmaceutical and Cell Biological Chemistry, Pharmaceutical Institute, University of Bonn, An der Immenburg 4, Bonn 53121, Germany
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6
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Pan Z, Zhao Y, Wang X, Xie X, Liu M, Zhang K, Wang L, Bai D, Foster LJ, Shu R, He G. Targeting bromodomain-containing proteins: research advances of drug discovery. MOLECULAR BIOMEDICINE 2023; 4:13. [PMID: 37142850 PMCID: PMC10159834 DOI: 10.1186/s43556-023-00127-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Accepted: 04/02/2023] [Indexed: 05/06/2023] Open
Abstract
Bromodomain (BD) is an evolutionarily conserved protein module found in 46 different BD-containing proteins (BCPs). BD acts as a specific reader for acetylated lysine residues (KAc) and serves an essential role in transcriptional regulation, chromatin remodeling, DNA damage repair, and cell proliferation. On the other hand, BCPs have been shown to be involved in the pathogenesis of a variety of diseases, including cancers, inflammation, cardiovascular diseases, and viral infections. Over the past decade, researchers have brought new therapeutic strategies to relevant diseases by inhibiting the activity or downregulating the expression of BCPs to interfere with the transcription of pathogenic genes. An increasing number of potent inhibitors and degraders of BCPs have been developed, some of which are already in clinical trials. In this paper, we provide a comprehensive review of recent advances in the study of drugs that inhibit or down-regulate BCPs, focusing on the development history, molecular structure, biological activity, interaction with BCPs and therapeutic potentials of these drugs. In addition, we discuss current challenges, issues to be addressed and future research directions for the development of BCPs inhibitors. Lessons learned from the successful or unsuccessful development experiences of these inhibitors or degraders will facilitate the further development of efficient, selective and less toxic inhibitors of BCPs and eventually achieve drug application in the clinic.
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Affiliation(s)
- Zhaoping Pan
- Department of Dermatology & Venerology and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, China
- Laboratory of Dermatology, Clinical Institute of Inflammation and Immunology (CIII), Frontiers Science Center for Disease-Related Molecular Network, West China Hospital, Sichuan University, Chengdu, 610041, China
| | - Yuxi Zhao
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Disease, Department of Orthodontics and Pediatrics, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Xiaoyun Wang
- Department of Dermatology & Venerology and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, China
- Laboratory of Dermatology, Clinical Institute of Inflammation and Immunology (CIII), Frontiers Science Center for Disease-Related Molecular Network, West China Hospital, Sichuan University, Chengdu, 610041, China
| | - Xin Xie
- College of Medical Technology and School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China
- Michael Smith Laboratories, University of British Columbia, Vancouver, BC, V6T 1Z4, Canada
| | - Mingxia Liu
- Department of Dermatology & Venerology and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, China
| | - Kaiyao Zhang
- Department of Dermatology & Venerology and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, China
| | - Lian Wang
- Department of Dermatology & Venerology and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, China
| | - Ding Bai
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Disease, Department of Orthodontics and Pediatrics, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Leonard J Foster
- Michael Smith Laboratories, University of British Columbia, Vancouver, BC, V6T 1Z4, Canada
| | - Rui Shu
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Disease, Department of Orthodontics and Pediatrics, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China.
| | - Gu He
- Department of Dermatology & Venerology and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, China.
- Laboratory of Dermatology, Clinical Institute of Inflammation and Immunology (CIII), Frontiers Science Center for Disease-Related Molecular Network, West China Hospital, Sichuan University, Chengdu, 610041, China.
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7
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Targeting histone deacetylases for cancer therapy: Trends and challenges. Acta Pharm Sin B 2023. [DOI: 10.1016/j.apsb.2023.02.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023] Open
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8
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Wernersson S, Bobby R, Flavell L, Milbradt AG, Holdgate GA, Embrey KJ, Akke M. Bromodomain Interactions with Acetylated Histone 4 Peptides in the BRD4 Tandem Domain: Effects on Domain Dynamics and Internal Flexibility. Biochemistry 2022; 61:2303-2318. [PMID: 36215732 PMCID: PMC9631989 DOI: 10.1021/acs.biochem.2c00226] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
![]()
The bromodomain and extra-terminal (BET) protein BRD4
regulates
gene expression via recruitment of transcriptional regulatory complexes
to acetylated chromatin. Like other BET proteins, BRD4 contains two
bromodomains, BD1 and BD2, that can interact cooperatively with target
proteins and designed ligands, with important implications for drug
discovery. Here, we used nuclear magnetic resonance (NMR) spectroscopy
to study the dynamics and interactions of the isolated bromodomains,
as well as the tandem construct including both domains and the intervening
linker, and investigated the effects of binding a tetra-acetylated
peptide corresponding to the tail of histone 4. The peptide affinity
is lower for both domains in the tandem construct than for the isolated
domains. Using 15N spin relaxation, we determined the global
rotational correlation times and residue-specific order parameters
for BD1 and BD2. Isolated BD1 is monomeric in the apo state but apparently
dimerizes upon binding the tetra-acetylated peptide. Isolated BD2
partially dimerizes in both the apo and peptide-bound states. The
backbone order parameters reveal marked differences between BD1 and
BD2, primarily in the acetyl-lysine binding site where the ZA loop
is more flexible in BD2. Peptide binding reduces the order parameters
of the ZA loop in BD1 and the ZA and BC loops in BD2. The AB loop,
located distally from the binding site, shows variable dynamics that
reflect the different dimerization propensities of the domains. These
results provide a basis for understanding target recognition by BRD4.
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Affiliation(s)
- Sven Wernersson
- Biophysical Chemistry, Center for Molecular Protein Science, Department of Chemistry, Lund University, SE-221 00Lund, Sweden
| | - Romel Bobby
- Mechanistic and Structural Biology, Discovery Sciences, BioPharmaceuticals R&D, AstraZeneca, CambridgeCB4 0WG, U.K
| | - Liz Flavell
- Discovery Biology, Discovery Sciences, BioPharmaceuticals R&D, AstraZeneca, Cambridge Science Park, CambridgeCB4 0WG, U.K
| | - Alexander G Milbradt
- Mechanistic and Structural Biology, Discovery Sciences, BioPharmaceuticals R&D, AstraZeneca, CambridgeCB4 0WG, U.K
| | - Geoffrey A Holdgate
- Mechanistic and Structural Biology, Discovery Sciences, BioPharmaceuticals R&D, AstraZeneca, CambridgeCB4 0WG, U.K
| | - Kevin J Embrey
- Mechanistic and Structural Biology, Discovery Sciences, BioPharmaceuticals R&D, AstraZeneca, CambridgeCB4 0WG, U.K
| | - Mikael Akke
- Biophysical Chemistry, Center for Molecular Protein Science, Department of Chemistry, Lund University, SE-221 00Lund, Sweden
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9
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Xiang XS, Li PC, Wang WQ, Liu L. Histone deacetylases: A novel class of therapeutic targets for pancreatic cancer. Biochim Biophys Acta Rev Cancer 2022; 1877:188676. [PMID: 35016922 DOI: 10.1016/j.bbcan.2022.188676] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2021] [Revised: 12/31/2021] [Accepted: 01/05/2022] [Indexed: 12/24/2022]
Abstract
Pancreatic cancer is the seventh leading cause of cancer death worldwide, with a low 5-year survival rate. Novel agents are urgently necessary to treat the main pathological type, known as pancreatic ductal carcinoma (PDAC). The dysregulation of histone deacetylases (HDACs) has been identified in association with PDAC, which can be more easily targeted by small molecular inhibitors than gene mutations and may represent a therapeutic breakthrough for PDAC. However, the contributions of HDACs to PDAC remain controversial, and pharmacokinetic challenges have limited the application of HDAC inhibitors (HDACis) in PDAC. This review summarizes the mechanisms associated with success and failure of HDACis in PDAC and discusses the recent progress made in HDACi development and application, such as combination therapies designed to enhance efficacy. More precise strategies involving HDACis might eventually improve the outcomes of PDAC treatment.
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Affiliation(s)
- Xue-Song Xiang
- Department of Pancreatic Surgery, Zhongshan Hospital, Fudan University, Shanghai, China; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Peng-Cheng Li
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Wen-Quan Wang
- Department of Pancreatic Surgery, Zhongshan Hospital, Fudan University, Shanghai, China; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China.
| | - Liang Liu
- Department of Pancreatic Surgery, Zhongshan Hospital, Fudan University, Shanghai, China; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China.
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10
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Green AI, Burslem GM. Photochemical synthesis of an epigenetic focused tetrahydroquinoline library. RSC Med Chem 2021; 12:1780-1786. [PMID: 34778779 DOI: 10.1039/d1md00193k] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Accepted: 08/24/2021] [Indexed: 12/21/2022] Open
Abstract
Discovery of epigenetic chemical probes is an important area of research with potential to deliver drugs for a multitude of diseases. However, commercially available libraries frequently used in drug discovery campaigns contain molecules that are focused on a narrow range of chemical space primarily driven by ease of synthesis and previously targeted enzyme classes (e.g., kinases) resulting in low hit rates for epigenetic targets. Here we describe the design and synthesis of a compound collection that augments current screening collections by the inclusion of privileged isosteres for epigenetic targets.
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Affiliation(s)
- Adam I Green
- Department of Biochemistry and Biophysics, Perelman School of Medicine, University of Pennsylvania PA 19104 USA
| | - George M Burslem
- Department of Biochemistry and Biophysics, Perelman School of Medicine, University of Pennsylvania PA 19104 USA .,Department of Cancer Biology and Epigenetics Institute, Perelman School of Medicine, University of Pennsylvania PA 19104 USA
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11
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Schäker-Hübner L, Warstat R, Ahlert H, Mishra P, Kraft FB, Schliehe-Diecks J, Schöler A, Borkhardt A, Breit B, Bhatia S, Hügle M, Günther S, Hansen FK. 4-Acyl Pyrrole Capped HDAC Inhibitors: A New Scaffold for Hybrid Inhibitors of BET Proteins and Histone Deacetylases as Antileukemia Drug Leads. J Med Chem 2021; 64:14620-14646. [PMID: 34582215 DOI: 10.1021/acs.jmedchem.1c01119] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Multitarget drugs are an emerging alternative to combination therapies. In three iterative cycles of design, synthesis, and biological evaluation, we developed a novel type of potent hybrid inhibitors of bromodomain, and extra-terminal (BET) proteins and histone deacetylases (HDACs) based on the BET inhibitor XD14 and well-established HDAC inhibitors. The most promising new hybrids, 49 and 61, displayed submicromolar inhibitory activity against HDAC1-3 and 6, and BRD4(1), and possess potent antileukemia activity. 49 induced apoptosis more effectively than the combination of ricolinostat and birabresib (1:1). The most balanced dual inhibitor, 61, induced significantly more apoptosis than the related control compounds 62 (no BRD4(1) affinity) and 63 (no HDAC inhibition) as well as the 1:1 combination of both. Additionally, 61 was well tolerated in an in vivo zebrafish toxicity model. Overall, our data suggest an advantage of dual HDAC/BET inhibitors over the combination of two single targeted compounds.
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Affiliation(s)
- Linda Schäker-Hübner
- Institut für Wirkstoffentwicklung, Medizinische Fakultät, Universität Leipzig, Brüderstraße 34, D-04103 Leipzig, Germany
| | - Robin Warstat
- Institut für Organische Chemie, Albert-Ludwigs-Universität Freiburg, Albertstraße 21, D-79104 Freiburg, Germany
| | - Heinz Ahlert
- Department of Pediatric Oncology, Hematology and Clinical Immunology, Medical Faculty, Heinrich-Heine University Düsseldorf, Moorenstraße 5, D-40225 Düsseldorf, Germany
| | - Pankaj Mishra
- Institut für Pharmazeutische Wissenschaften, Albert-Ludwigs-Universität Freiburg, Hermann-Herder-Strasse 9, D-79104 Freiburg, Germany
| | - Fabian B Kraft
- Institut für Wirkstoffentwicklung, Medizinische Fakultät, Universität Leipzig, Brüderstraße 34, D-04103 Leipzig, Germany.,Abteilung für Pharmazeutische und Zellbiologische Chemie, Pharmazeutisches Institut, Universität Bonn, An der Immenburg 4, D-53121 Bonn, Germany
| | - Julian Schliehe-Diecks
- Department of Pediatric Oncology, Hematology and Clinical Immunology, Medical Faculty, Heinrich-Heine University Düsseldorf, Moorenstraße 5, D-40225 Düsseldorf, Germany
| | - Andrea Schöler
- Institut für Wirkstoffentwicklung, Medizinische Fakultät, Universität Leipzig, Brüderstraße 34, D-04103 Leipzig, Germany
| | - Arndt Borkhardt
- Department of Pediatric Oncology, Hematology and Clinical Immunology, Medical Faculty, Heinrich-Heine University Düsseldorf, Moorenstraße 5, D-40225 Düsseldorf, Germany
| | - Bernhard Breit
- Institut für Organische Chemie, Albert-Ludwigs-Universität Freiburg, Albertstraße 21, D-79104 Freiburg, Germany
| | - Sanil Bhatia
- Department of Pediatric Oncology, Hematology and Clinical Immunology, Medical Faculty, Heinrich-Heine University Düsseldorf, Moorenstraße 5, D-40225 Düsseldorf, Germany
| | - Martin Hügle
- Institut für Biochemie, Albert-Ludwigs-Universität Freiburg, Albertstraße 21, D-79104 Freiburg, Germany
| | - Stefan Günther
- Institut für Pharmazeutische Wissenschaften, Albert-Ludwigs-Universität Freiburg, Hermann-Herder-Strasse 9, D-79104 Freiburg, Germany
| | - Finn K Hansen
- Institut für Wirkstoffentwicklung, Medizinische Fakultät, Universität Leipzig, Brüderstraße 34, D-04103 Leipzig, Germany.,Abteilung für Pharmazeutische und Zellbiologische Chemie, Pharmazeutisches Institut, Universität Bonn, An der Immenburg 4, D-53121 Bonn, Germany
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12
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Feng L, Wang G, Chen Y, He G, Liu B, Liu J, Chiang CM, Ouyang L. Dual-target inhibitors of bromodomain and extra-terminal proteins in cancer: A review from medicinal chemistry perspectives. Med Res Rev 2021; 42:710-743. [PMID: 34633088 DOI: 10.1002/med.21859] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 07/14/2021] [Accepted: 09/26/2021] [Indexed: 02/05/2023]
Abstract
Bromodomain-containing protein 4 (BRD4), as the most studied member of the bromodomain and extra-terminal (BET) family, is a chromatin reader protein interpreting epigenetic codes through binding to acetylated histones and non-histone proteins, thereby regulating diverse cellular processes including cell cycle, cell differentiation, and cell proliferation. As a promising drug target, BRD4 function is closely related to cancer, inflammation, cardiovascular disease, and liver fibrosis. Currently, clinical resistance to BET inhibitors has limited their applications but synergistic antitumor effects have been observed when used in combination with other tumor inhibitors targeting additional cellular components such as PLK1, HDAC, CDK, and PARP1. Therefore, designing dual-target inhibitors of BET bromodomains is a rational strategy in cancer treatment to increase potency and reduce drug resistance. This review summarizes the protein structures and biological functions of BRD4 and discusses recent advances of dual BET inhibitors from a medicinal chemistry perspective. We also discuss the current design and discovery strategies for dual BET inhibitors, providing insight into potential discovery of additional dual-target BET inhibitors.
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Affiliation(s)
- Lu Feng
- State Key Laboratory of Biotherapy and Cancer Center, Innovation Center of Nursing Research, Nursing Key Laboratory of Sichuan Province, National Clinical Research Center for Geriatrics, West China Hospital, and Collaborative Innovation Center of Biotherapy, Sichuan University, Chengdu, China
| | - Guan Wang
- State Key Laboratory of Biotherapy and Cancer Center, Innovation Center of Nursing Research, Nursing Key Laboratory of Sichuan Province, National Clinical Research Center for Geriatrics, West China Hospital, and Collaborative Innovation Center of Biotherapy, Sichuan University, Chengdu, China
| | - Yi Chen
- State Key Laboratory of Biotherapy and Cancer Center and Department of Gastrointestinal Surgery, West China Hospital, Sichuan University, and Collaborative Innovation Center for Biotherapy, Chengdu, China
| | - Gu He
- State Key Laboratory of Biotherapy and Cancer Center, Innovation Center of Nursing Research, Nursing Key Laboratory of Sichuan Province, National Clinical Research Center for Geriatrics, West China Hospital, and Collaborative Innovation Center of Biotherapy, Sichuan University, Chengdu, China
| | - Bo Liu
- State Key Laboratory of Biotherapy and Cancer Center, Innovation Center of Nursing Research, Nursing Key Laboratory of Sichuan Province, National Clinical Research Center for Geriatrics, West China Hospital, and Collaborative Innovation Center of Biotherapy, Sichuan University, Chengdu, China
| | - Jie Liu
- State Key Laboratory of Biotherapy and Cancer Center, Innovation Center of Nursing Research, Nursing Key Laboratory of Sichuan Province, National Clinical Research Center for Geriatrics, West China Hospital, and Collaborative Innovation Center of Biotherapy, Sichuan University, Chengdu, China
| | - Cheng-Ming Chiang
- Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas, Texas, USA.,Department of Pharmacology, University of Texas Southwestern Medical Center, Dallas, Texas, USA.,Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Liang Ouyang
- State Key Laboratory of Biotherapy and Cancer Center, Innovation Center of Nursing Research, Nursing Key Laboratory of Sichuan Province, National Clinical Research Center for Geriatrics, West China Hospital, and Collaborative Innovation Center of Biotherapy, Sichuan University, Chengdu, China
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13
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Romanelli MN, Borgonetti V, Galeotti N. Dual BET/HDAC inhibition to relieve neuropathic pain: Recent advances, perspectives, and future opportunities. Pharmacol Res 2021; 173:105901. [PMID: 34547384 DOI: 10.1016/j.phrs.2021.105901] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Revised: 09/03/2021] [Accepted: 09/14/2021] [Indexed: 12/15/2022]
Abstract
Despite the intense research on developing new therapies for neuropathic pain states, available treatments have limited efficacy and unfavorable safety profiles. Epigenetic alterations have a great influence on the development of cancer and neurological diseases, as well as neuropathic pain. Histone acetylation has prevailed as one of the well investigated epigenetic modifications in these diseases. Altered spinal activity of histone deacetylase (HDAC) and Bromo and Extra terminal domain (BET) have been described in neuropathic pain models and restoration of these aberrant epigenetic modifications showed pain-relieving activity. Over the last decades HDACs and BETs have been the focus of drug discovery studies, leading to the development of numerous small-molecule inhibitors. Clinical trials to evaluate their anticancer activity showed good efficacy but raised toxicity concerns that limited translation to the clinic. To maximize activity and minimize toxicity, these compounds can be applied in combination of sub-maximal doses to produce additive or synergistic interactions (combination therapy). Recently, of particular interest, dual BET/HDAC inhibitors (multi-target drugs) have been developed to assure simultaneous modulation of BET and HDAC activity by a single molecule. This review will summarize the most recent advances with these strategies, describing advantages and limitations of single drug treatment vs combination regimens. This review will also provide a focus on dual BET/HDAC drug discovery investigations as future therapeutic opportunity for human therapy of neuropathic pain.
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Affiliation(s)
- Maria Novella Romanelli
- Department of Neuroscience, Psychology, Drug Research and Child Health (NEUROFARBA), Section of Pharmaceutical and Nutraceutical Sciences, University of Florence, Via Ugo Schiff 6, 50019 Sesto Fiorentino, Italy
| | - Vittoria Borgonetti
- Department of Neuroscience, Psychology, Drug Research and Child Health (NEUROFARBA), Section of Pharmacology and Toxicology, University of Florence, Viale G. Pieraccini 6, 50139 Florence, Italy
| | - Nicoletta Galeotti
- Department of Neuroscience, Psychology, Drug Research and Child Health (NEUROFARBA), Section of Pharmacology and Toxicology, University of Florence, Viale G. Pieraccini 6, 50139 Florence, Italy.
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14
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15
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Guest EE, Pickett SD, Hirst JD. Structural variation of protein-ligand complexes of the first bromodomain of BRD4. Org Biomol Chem 2021; 19:5632-5641. [PMID: 34105560 DOI: 10.1039/d1ob00658d] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The bromodomain-containing protein 4 (BRD4), a member of the bromodomain and extra-terminal domain (BET) family, plays a key role in several diseases, especially cancers. With increased interest in BRD4 as a therapeutic target, many X-ray crystal structures of the protein in complex with small molecule inhibitors are publicly available over the recent decade. In this study, we use this structural information to investigate the conformations of the first bromodomain (BD1) of BRD4. Structural alignment of 297 BRD4-BD1 complexes shows a high level of similarity between the structures of BRD4-BD1, regardless of the bound ligand. We employ WONKA, a tool for detailed analyses of protein binding sites, to compare the active site of over 100 of these crystal structures. The positions of key binding site residues show a high level of conformational similarity, with the exception of Trp81. A focused analysis on the highly conserved water network in the binding site of BRD4-BD1 is performed to identify the positions of these water molecules across the crystal structures. The importance of the water network is illustrated using molecular docking and absolute free energy perturbation simulations. 82% of the ligand poses were better predicted when including water molecules as part of the receptor. Our analysis provides guidance for the design of new BRD4-BD1 inhibitors and the selection of the best structure of BRD4-BD1 to use in structure-based drug design, an important approach for faster and more cost-efficient lead discovery.
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Affiliation(s)
- Ellen E Guest
- School of Chemistry, University of Nottingham, University Park, Nottingham, NG7 2RD, UK.
| | - Stephen D Pickett
- GlaxoSmithKline R&D Pharmaceuticals, Computational Chemistry, Stevenage, UK
| | - Jonathan D Hirst
- School of Chemistry, University of Nottingham, University Park, Nottingham, NG7 2RD, UK.
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16
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Zhang S, Chen Y, Tian C, He Y, Tian Z, Wan Y, Liu T. Dual-target Inhibitors Based on BRD4: Novel Therapeutic Approaches for Cancer. Curr Med Chem 2021; 28:1775-1795. [PMID: 32520674 DOI: 10.2174/0929867327666200610174453] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Revised: 03/30/2020] [Accepted: 04/06/2020] [Indexed: 11/22/2022]
Abstract
BACKGROUND Currently, cancer continues being a dramatically increasing and serious threat to public health. Although many anti-tumor agents have been developed in recent years, the survival rate of patients is not satisfactory. The poor prognosis of cancer patients is closely related to the occurrence of drug resistance. Therefore, it is urgent to develop new strategies for cancer treatment. Multi-target therapies aim to have additive or synergistic effects and reduce the potential for the development of resistance by integrating different pharmacophores into a single drug molecule. Given the fact that majority of diseases are multifactorial in nature, multi-target therapies are being exploited with increasing intensity, which has brought improved outcomes in disease models and obtained several compounds that have entered clinical trials. Thus, it is potential to utilize this strategy for the treatment of BRD4 related cancers. This review focuses on the recent research advances of dual-target inhibitors based on BRD4 in the aspect of anti-tumor. METHODS We have searched the recent literatures about BRD4 inhibitors from the online resources and databases, such as pubmed, elsevier and google scholar. RESULTS In the recent years, many efforts have been taken to develop dual-target inhibitors based on BRD4 as anti-cancer agents, such as HDAC/BRD4 dual inhibitors, PLK1/BRD4 dual inhibitors and PI3K/BRD4 dual inhibitors and so on. Most compounds display good anti-tumor activities. CONCLUSION Developing new anti-cancer agents with new scaffolds and high efficiency is a big challenge for researchers. Dual-target inhibitors based on BRD4 are a class of important bioactive compounds. Making structural modifications on the active dual-target inhibitors according to the corresponding structure-activity relationships is of benefit to obtain more potent anti-cancer leads or clinical drugs. This review will be useful for further development of new dual-target inhibitors based on BRD4 as anti-cancer agents.
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Affiliation(s)
- Sitao Zhang
- Department of Medicinal Chemistry, School of Pharmacy, Shandong First Medical University & Shandong Academy of Medical Sciences, Taian 271000, Shandong, China
| | - Yanzhao Chen
- Department of Medicinal Chemistry, School of Pharmacy, Shandong First Medical University & Shandong Academy of Medical Sciences, Taian 271000, Shandong, China
| | - Chengsen Tian
- School of Chemistry and Chemical Engineering, Qilu Normal University, Jinan, Shandong 250200, China
| | - Yujing He
- Department of Medicinal Chemistry, School of Pharmacy, Shandong First Medical University & Shandong Academy of Medical Sciences, Taian 271000, Shandong, China
| | - Zeru Tian
- Department of Chemistry, Rice University, 6100 Main Street, Houston, Texas 77005, United States
| | - Yichao Wan
- Key Laboratory of Theoretical Organic Chemistry and Functional Molecule, Ministry of Education, Hunan Provincial Key Laboratory of Controllable Preparation and Functional Application of Fine Polymers, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, Hunan 411201, China
| | - Tingting Liu
- Department of Medicinal Chemistry, School of Pharmacy, Shandong First Medical University & Shandong Academy of Medical Sciences, Taian 271000, Shandong, China
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17
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Current status in the discovery of dual BET/HDAC inhibitors. Bioorg Med Chem Lett 2021; 38:127829. [PMID: 33685790 DOI: 10.1016/j.bmcl.2021.127829] [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: 11/23/2022]
Abstract
The development of desired multitarget agents may provide an attractive and cost-effective complement or alternative to drug combinations. Bromodomain and extraterminal domain (BET) and histone deacetylase (HDAC), as important epigenetic modulators, are attractive targets in drug discovery and development. Considering the fact that BET and HDAC inhibitors exert a synergistic effect on cellular processes in cancer cells, the design of dual BET/HDAC inhibitors may be a rational strategy to improve the efficacy of their single-target drugs for tumor treatment. In the current review, we depict the development of dual BET/HDAC inhibitors and particularly highlight their structure-activity relationships (SARs), binding modes, and biological functions with the aim to facilitate rational drug design and develop more dual BET/HDAC inhibitors.
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18
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Jenke R, Reßing N, Hansen FK, Aigner A, Büch T. Anticancer Therapy with HDAC Inhibitors: Mechanism-Based Combination Strategies and Future Perspectives. Cancers (Basel) 2021; 13:634. [PMID: 33562653 PMCID: PMC7915831 DOI: 10.3390/cancers13040634] [Citation(s) in RCA: 86] [Impact Index Per Article: 28.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 01/30/2021] [Accepted: 02/02/2021] [Indexed: 12/26/2022] Open
Abstract
The increasing knowledge of molecular drivers of tumorigenesis has fueled targeted cancer therapies based on specific inhibitors. Beyond "classic" oncogene inhibitors, epigenetic therapy is an emerging field. Epigenetic alterations can occur at any time during cancer progression, altering the structure of the chromatin, the accessibility for transcription factors and thus the transcription of genes. They rely on post-translational histone modifications, particularly the acetylation of histone lysine residues, and are determined by the inverse action of histone acetyltransferases (HATs) and histone deacetylases (HDACs). Importantly, HDACs are often aberrantly overexpressed, predominantly leading to the transcriptional repression of tumor suppressor genes. Thus, histone deacetylase inhibitors (HDACis) are powerful drugs, with some already approved for certain hematological cancers. Albeit HDACis show activity in solid tumors as well, further refinement and the development of novel drugs are needed. This review describes the capability of HDACis to influence various pathways and, based on this knowledge, gives a comprehensive overview of various preclinical and clinical studies on solid tumors. A particular focus is placed on strategies for achieving higher efficacy by combination therapies, including phosphoinositide 3-kinase (PI3K)-EGFR inhibitors and hormone- or immunotherapy. This also includes new bifunctional inhibitors as well as novel approaches for HDAC degradation via PROteolysis-TArgeting Chimeras (PROTACs).
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Affiliation(s)
- Robert Jenke
- University Cancer Center Leipzig (UCCL), University Hospital Leipzig, D-04103 Leipzig, Germany
- Clinical Pharmacology, Rudolf-Boehm-Institute for Pharmacology and Toxicology, Medical Faculty, University of Leipzig, D-04107 Leipzig, Germany;
| | - Nina Reßing
- Department of Pharmaceutical and Cell Biological Chemistry, Pharmaceutical Institute, Rheinische Fried-rich-Wilhelms-Universität Bonn, D-53121 Bonn, Germany; (N.R.); (F.K.H.)
| | - Finn K. Hansen
- Department of Pharmaceutical and Cell Biological Chemistry, Pharmaceutical Institute, Rheinische Fried-rich-Wilhelms-Universität Bonn, D-53121 Bonn, Germany; (N.R.); (F.K.H.)
| | - Achim Aigner
- Clinical Pharmacology, Rudolf-Boehm-Institute for Pharmacology and Toxicology, Medical Faculty, University of Leipzig, D-04107 Leipzig, Germany;
| | - Thomas Büch
- Clinical Pharmacology, Rudolf-Boehm-Institute for Pharmacology and Toxicology, Medical Faculty, University of Leipzig, D-04107 Leipzig, Germany;
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Su M, Gong X, Liu F. An update on the emerging approaches for histone deacetylase (HDAC) inhibitor drug discovery and future perspectives. Expert Opin Drug Discov 2021; 16:745-761. [PMID: 33530771 DOI: 10.1080/17460441.2021.1877656] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
INTRODUCTION HDACs catalyze the removal of acetyl groups from the ε-N-acetylated lysine residues of various protein substrates including both histone and nonhistone proteins. Different HDACs have distinct biological functions and are recruited to specific regions of the genome. HDAC inhibitors have attracted much attention in recent decades; indeed, there have been more than thirty HDAC inhibitors investigated in clinic trials with five approvals being achieved. AREAS COVERED This review covers the emerging approaches for HDAC inhibitor drug discovery from the past five years and includes discussion of structure-based rational design, isoform selectivity, and dual mechanism/multi-targeting. Chemical structures in addition to the in vitro and in vivo inhibiting activity of these compounds have also been discussed. EXPERT OPINION The exact role and biological functions of HDACs is still under investigation with a variety of HDAC inhibitors having been designed and evaluated. HDAC inhibitors have shown promise in treating cancer, AD, metabolic disease, viral infection, and multiple sclerosis, but there is still a lot of room for clinical improvement. In the future, more efforts should be put into (i) HDAC isoform identification (ii) the optimization of selectivity, activity, and pharmacokinetics; and (iii) unconventional approaches for discovering different effective scaffolds and pharmacophores.
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Affiliation(s)
- Ma Su
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Department of Medicinal Chemistry, College of Pharmaceutical Sciences, Soochow University, Suzhou, PR China
| | - Xingyu Gong
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Department of Medicinal Chemistry, College of Pharmaceutical Sciences, Soochow University, Suzhou, PR China
| | - Feng Liu
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Department of Medicinal Chemistry, College of Pharmaceutical Sciences, Soochow University, Suzhou, PR China
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20
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Current status in the discovery of dual BET/HDAC inhibitors. Bioorg Med Chem Lett 2021; 31:127671. [PMID: 33229136 DOI: 10.1016/j.bmcl.2020.127671] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2020] [Revised: 10/22/2020] [Accepted: 11/01/2020] [Indexed: 12/13/2022]
Abstract
The development of desired multitarget agents may provide an attractive and cost-effective complement or alternative to drug combinations. BET and HDAC, as important epigenetic modulators, are both attractive targets in drug discovery and development. Considering the fact that BET and HDAC inhibitors exert a synergistic effect on cellular processes in cancer cells, the design of dual BET/HDAC inhibitors may be a rational strategy to improve the efficacy of their single-target drugs for tumor treatment. In current review, we depict the development of dual BET/HDAC inhibitors and particularly highlight their SARs, binding modes and biological functions with the aim to facilitate rational design and develop more dual BET/HDAC inhibitors.
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21
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Discovery of selective HDAC/BRD4 dual inhibitors as epigenetic probes. Eur J Med Chem 2020; 209:112868. [PMID: 33077265 DOI: 10.1016/j.ejmech.2020.112868] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Revised: 09/14/2020] [Accepted: 09/21/2020] [Indexed: 12/15/2022]
Abstract
According to the binding mode of ABBV-744 with bromodomains and the cape space of HDAC, the novel selective HDAC/BRD4 dual inhibitors were designed and synthesized by the pharmacophore fusion strategy. Evaluating the biomolecular activities through SARs exploration identified three kinds of selective dual inhibitors 41c (HDAC1/BRD4), 43a (pan-HDAC/BRD4) and 43d (HDAC6/BRD4(BD2)), whose target-related cellular activities in MV-4-11 cells were also confirmed. Significantly, the selective dual inhibitor 41c (HDAC1/BRD4) exhibited synergistic effects against MV-4-11 cells, which strongly induced G0/G1 cell cycle arrest and apoptosis, and the first HDAC6/BRD4(BD2) dual inhibitor was found. This study provides support for selective HDAC/BRD4 dual inhibitors as epigenetic probes based on pyrrolopyridone core for the future biological evaluation in different cancer cell lines.
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22
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Bass AKA, El-Zoghbi MS, Nageeb ESM, Mohamed MFA, Badr M, Abuo-Rahma GEDA. Comprehensive review for anticancer hybridized multitargeting HDAC inhibitors. Eur J Med Chem 2020; 209:112904. [PMID: 33077264 DOI: 10.1016/j.ejmech.2020.112904] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2020] [Revised: 09/18/2020] [Accepted: 09/30/2020] [Indexed: 02/08/2023]
Abstract
Despite the encouraging clinical progress of chemotherapeutic agents in cancer treatment, innovation and development of new effective anticancer candidates still represents a challenging endeavor. With 15 million death every year in 2030 according to the estimates, cancer has increased rising of an alarm as a real crisis for public health and health systems worldwide. Therefore, scientist began to introduce innovative solutions to control the cancer global health problem. One of the promising strategies in this issue is the multitarget or smart hybrids having two or more pharmacophores targeting cancer. These rationalized hybrid molecules have gained great interests in cancer treatment as they are capable to simultaneously inhibit more than cancer pathway or target without drug-drug interactions and with less side effects. A prime important example of these hybrids, the HDAC hybrid inhibitors or referred as multitargeting HDAC inhibitors. The ability of HDAC inhibitors to synergistically improve the efficacy of other anti-cancer drugs and moreover, the ease of HDAC inhibitors cap group modification prompt many medicinal chemists to innovate and develop new generation of HDAC hybrid inhibitors. Notably, and during this short period, there are four HDAC inhibitor hybrids have entered different phases of clinical trials for treatment of different types of blood and solid tumors, namely; CUDC-101, CUDC-907, Tinostamustine, and Domatinostat. This review shed light on the most recent hybrids of HDACIs with one or more other cancer target pharmacophore. The designed multitarget hybrids include topoisomerase inhibitors, kinase inhibitors, nitric oxide releasers, antiandrogens, FLT3 and JAC-2 inhibitors, PDE5-inhibitors, NAMPT-inhibitors, Protease inhibitors, BRD4-inhibitors and other targets. This review may help researchers in development and discovery of new horizons in cancer treatment.
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Affiliation(s)
- Amr K A Bass
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Menoufia University, Menoufia, Egypt
| | - Mona S El-Zoghbi
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Menoufia University, Menoufia, Egypt
| | - El-Shimaa M Nageeb
- Department of Medicinal Chemistry, Faculty of Pharmacy, Minia University, Minia, 61519, Egypt
| | - Mamdouh F A Mohamed
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Sohag University, 82524 Sohag, Egypt
| | - Mohamed Badr
- Department of Biochemistry, Faculty of Pharmacy, Menoufia University, Menoufia, Egypt
| | - Gamal El-Din A Abuo-Rahma
- Department of Medicinal Chemistry, Faculty of Pharmacy, Minia University, Minia, 61519, Egypt; Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Deraya University, New Minia, Minia, Egypt.
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23
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Recent progress on cheminformatics approaches to epigenetic drug discovery. Drug Discov Today 2020; 25:2268-2276. [PMID: 33010481 DOI: 10.1016/j.drudis.2020.09.021] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Revised: 08/31/2020] [Accepted: 09/17/2020] [Indexed: 12/16/2022]
Abstract
The ability of epigenetic markers to affect genome function has enabled transformative changes in drug discovery, especially in cancer and other emerging therapeutic areas. Concordant with the introduction of the term 'epi-informatics', the size of the epigenetically relevant chemical space has grown substantially and so did the number of applications of cheminformatic methods to epigenetics. Recent progress in epi-informatics has improved our understanding of the structure-epigenetic activity relationships and boosted the development of models predicting novel epigenetic agents. Herein, we review the advances in computational approaches to drug discovery of small molecules with epigenetic modulation profiles, summarize the current chemogenomics data available for epigenetic targets, and provide a perspective on the greater utility of biomedical knowledge mining as a means to advance the epigenetic drug discovery.
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24
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Dual inhibitors of histone deacetylases and other cancer-related targets: A pharmacological perspective. Biochem Pharmacol 2020; 182:114224. [PMID: 32956642 DOI: 10.1016/j.bcp.2020.114224] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 09/01/2020] [Accepted: 09/16/2020] [Indexed: 12/14/2022]
Abstract
Epigenetic enzymes histone deacetylases (HDACs) are clinically validated anticancer drug targets which have been studied intensively in the past few decades. Although several drugs have been approved in this field, they are still limited to a subset of hematological malignancies (in particular T-cell lymphomas), with therapeutic potential not fully realized and the drug-resistance occurred after a certain period of use. To maximize the therapeutic potential of these classes of anticancer drugs, and to extend their application to solid tumors, numerous combination therapies containing an HDACi and an anticancer agent from other mechanisms are currently ongoing in clinical trials. Recently, dual targeting strategy comprising the HDACs component has emerged as an alternative approach for combination therapies. In this perspective, we intend to gather all HDACs-containing dual inhibitors related to cancer therapy published in literature since 2015, classify them into five categories based on targets' biological functions, and discuss the rationale why dual acting agents should work better than combinatorial therapies using two separate drugs. The article discusses the pharmacological aspects of these dual inhibitors, including in vitro biological activities, pharmacokinetic studies, in vivo efficacy studies, as well as available clinical trials. The review of the current status and advances should provide better analysis for future opportunities and challenges of this field.
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25
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Vaidya GN, Rana P, Venkatesh A, Chatterjee DR, Contractor D, Satpute DP, Nagpure M, Jain A, Kumar D. Paradigm shift of "classical" HDAC inhibitors to "hybrid" HDAC inhibitors in therapeutic interventions. Eur J Med Chem 2020; 209:112844. [PMID: 33143937 DOI: 10.1016/j.ejmech.2020.112844] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 09/10/2020] [Accepted: 09/10/2020] [Indexed: 02/07/2023]
Abstract
'Epigenetic' regulation of genes via post-translational modulation of proteins is the current mainstay approach for the disease therapies, particularly explored in the Histone Deacetylase (HDAC) class of enzymes. Mainly sight saw in cancer chemotherapeutics, HDAC inhibitors have also found a promising role in other diseases (neurodegenerative disorders, cardiovascular diseases, and viral infections) and successfully entered in various combination therapies (pre-clinical/clinical stages). The prevalent flexibility in the structural design of HDAC inhibitors makes them easily tuneable to merge with other pharmacophore modules for generating multi-targeted single hybrids as a novel tactic to overcome drawbacks of polypharmacy. Herein, we reviewed the putative role of prevalent HDAC hybrids inhibitors in the current and prospective stage as a translational approach to overcome the limitations of the existing conventional drug candidates (parent molecule) when used either alone (drug resistance, solubility issues, adverse side effects, selectivity profile) or in combination (pharmacokinetic interactions, patient compliance) for treating various diseases.
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Affiliation(s)
- Gargi Nikhil Vaidya
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER) - Ahmedabad, Palaj, Gandhinagar, 382355, Gujarat, India
| | - Pooja Rana
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER) - Ahmedabad, Palaj, Gandhinagar, 382355, Gujarat, India
| | - Ashwini Venkatesh
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER) - Ahmedabad, Palaj, Gandhinagar, 382355, Gujarat, India
| | - Deep Rohan Chatterjee
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER) - Ahmedabad, Palaj, Gandhinagar, 382355, Gujarat, India
| | - Darshan Contractor
- Department of Biotechnology, National Institute of Pharmaceutical Education and Research (NIPER) - Ahmedabad, Palaj, Gandhinagar, 382355, Gujarat, India
| | - Dinesh Parshuram Satpute
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER) - Ahmedabad, Palaj, Gandhinagar, 382355, Gujarat, India
| | - Mithilesh Nagpure
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER) - Ahmedabad, Palaj, Gandhinagar, 382355, Gujarat, India
| | - Alok Jain
- Department of Biotechnology, National Institute of Pharmaceutical Education and Research (NIPER) - Ahmedabad, Palaj, Gandhinagar, 382355, Gujarat, India; Department of Bio-Engineering, Birla Institute of Technology, Mesra, Ranchi, India.
| | - Dinesh Kumar
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER) - Ahmedabad, Palaj, Gandhinagar, 382355, Gujarat, India.
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26
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Morgen M, Steimbach RR, Géraldy M, Hellweg L, Sehr P, Ridinger J, Witt O, Oehme I, Herbst‐Gervasoni CJ, Osko JD, Porter NJ, Christianson DW, Gunkel N, Miller AK. Design and Synthesis of Dihydroxamic Acids as HDAC6/8/10 Inhibitors. ChemMedChem 2020; 15:1163-1174. [PMID: 32348628 PMCID: PMC7335359 DOI: 10.1002/cmdc.202000149] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Revised: 04/23/2020] [Indexed: 12/22/2022]
Abstract
We report the synthesis and evaluation of a class of selective multitarget agents for the inhibition of HDAC6, HDAC8, and HDAC10. The concept for this study grew out of a structural analysis of the two selective inhibitors Tubastatin A (HDAC6/10) and PCI-34051 (HDAC8), which we recognized share the same N-benzylindole core. Hybridization of the two inhibitor structures resulted in dihydroxamic acids with benzyl-indole and -indazole core motifs. These substances exhibit potent activity against HDAC6, HDAC8, and HDAC10, while retaining selectivity over HDAC1, HDAC2, and HDAC3. The best substance inhibited the viability of the SK-N-BE(2)C neuroblastoma cell line with an IC50 value similar to a combination treatment with Tubastatin A and PCI-34051. This compound class establishes a proof of concept for such hybrid molecules and could serve as a starting point for the further development of enhanced HDAC6/8/10 inhibitors.
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Affiliation(s)
- Michael Morgen
- Cancer Drug Development GroupGerman Cancer Research Center (DKFZ)Im Neuenheimer Feld 28069120HeidelbergGermany
| | - Raphael R. Steimbach
- Cancer Drug Development GroupGerman Cancer Research Center (DKFZ)Im Neuenheimer Feld 28069120HeidelbergGermany
- Faculty of BiosciencesUniversity of Heidelberg69120HeidelbergGermany
| | - Magalie Géraldy
- Cancer Drug Development GroupGerman Cancer Research Center (DKFZ)Im Neuenheimer Feld 28069120HeidelbergGermany
| | - Lars Hellweg
- Cancer Drug Development GroupGerman Cancer Research Center (DKFZ)Im Neuenheimer Feld 28069120HeidelbergGermany
| | - Peter Sehr
- Chemical Biology Core FacilityEuropean Molecular Biology Laboratory (EMBL)69117HeidelbergGermany
| | - Johannes Ridinger
- Hopp Children's Cancer Center Heidelberg (KiTZ)69120HeidelbergGermany
- Clinical Cooperation Unit Pediatric OncologyGerman Cancer Research Center (DKFZ)69120HeidelbergGermany
- Department of Pediatric OncologyHematology and ImmunologyUniversity Hospital Heidelberg69120HeidelbergGermany
| | - Olaf Witt
- Hopp Children's Cancer Center Heidelberg (KiTZ)69120HeidelbergGermany
- Clinical Cooperation Unit Pediatric OncologyGerman Cancer Research Center (DKFZ)69120HeidelbergGermany
- Department of Pediatric OncologyHematology and ImmunologyUniversity Hospital Heidelberg69120HeidelbergGermany
- German Cancer Consortium (DKTK)69120HeidelbergGermany
| | - Ina Oehme
- Hopp Children's Cancer Center Heidelberg (KiTZ)69120HeidelbergGermany
- Clinical Cooperation Unit Pediatric OncologyGerman Cancer Research Center (DKFZ)69120HeidelbergGermany
- Department of Pediatric OncologyHematology and ImmunologyUniversity Hospital Heidelberg69120HeidelbergGermany
| | - Corey J. Herbst‐Gervasoni
- Roy and Diana Vagelos LaboratoriesDepartment of ChemistryUniversity of PennsylvaniaPhiladelphiaPA 19104-6323USA
| | - Jeremy D. Osko
- Roy and Diana Vagelos LaboratoriesDepartment of ChemistryUniversity of PennsylvaniaPhiladelphiaPA 19104-6323USA
| | - Nicholas J. Porter
- Roy and Diana Vagelos LaboratoriesDepartment of ChemistryUniversity of PennsylvaniaPhiladelphiaPA 19104-6323USA
| | - David W. Christianson
- Roy and Diana Vagelos LaboratoriesDepartment of ChemistryUniversity of PennsylvaniaPhiladelphiaPA 19104-6323USA
| | - Nikolas Gunkel
- Cancer Drug Development GroupGerman Cancer Research Center (DKFZ)Im Neuenheimer Feld 28069120HeidelbergGermany
- German Cancer Consortium (DKTK)69120HeidelbergGermany
| | - Aubry K. Miller
- Cancer Drug Development GroupGerman Cancer Research Center (DKFZ)Im Neuenheimer Feld 28069120HeidelbergGermany
- German Cancer Consortium (DKTK)69120HeidelbergGermany
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27
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Zhang X, Zegar T, Weiser T, Hamdan FH, Berger BT, Lucas R, Balourdas DII, Ladigan S, Cheung PF, Liffers ST, Trajkovic-Arsic M, Scheffler B, Joerger AC, Hahn SA, Johnsen SA, Knapp S, Siveke JT. Characterization of a dual BET/HDAC inhibitor for treatment of pancreatic ductal adenocarcinoma. Int J Cancer 2020; 147:2847-2861. [PMID: 32599645 DOI: 10.1002/ijc.33137] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Revised: 05/03/2020] [Accepted: 05/18/2020] [Indexed: 12/11/2022]
Abstract
Pancreatic ductal adenocarcinoma (PDAC) is resistant to virtually all chemo- and targeted therapeutic approaches. Epigenetic regulators represent a novel class of drug targets. Among them, BET and HDAC proteins are central regulators of chromatin structure and transcription, and preclinical evidence suggests effectiveness of combined BET and HDAC inhibition in PDAC. Here, we describe that TW9, a newly generated adduct of the BET inhibitor (+)-JQ1 and class I HDAC inhibitor CI994, is a potent dual inhibitor simultaneously targeting BET and HDAC proteins. TW9 has a similar affinity to BRD4 bromodomains as (+)-JQ1 and shares a conserved binding mode, but is significantly more active in inhibiting HDAC1 compared to the parental HDAC inhibitor CI994. TW9 was more potent in inhibiting tumor cell proliferation compared to (+)-JQ1, CI994 alone or combined treatment of both inhibitors. Sequential administration of gemcitabine and TW9 showed additional synergistic antitumor effects. Microarray analysis revealed that dysregulation of a FOSL1-directed transcriptional program contributed to the antitumor effects of TW9. Our results demonstrate the potential of a dual chromatin-targeting strategy in the treatment of PDAC and provide a rationale for further development of multitarget inhibitors.
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Affiliation(s)
- Xin Zhang
- Institute for Developmental Cancer Therapeutics, West German Cancer Center, University Medicine Essen, Essen, Germany.,Division of Solid Tumor Translational Oncology, German Cancer Consortium (DKTK, partner site University Hospital Essen) and German Cancer Research Center, DKFZ, Heidelberg, Germany
| | - Tim Zegar
- Institute for Developmental Cancer Therapeutics, West German Cancer Center, University Medicine Essen, Essen, Germany.,Division of Solid Tumor Translational Oncology, German Cancer Consortium (DKTK, partner site University Hospital Essen) and German Cancer Research Center, DKFZ, Heidelberg, Germany
| | - Tim Weiser
- Structural Genomics Consortium, Buchmann Institute for Life Sciences, Goethe University Frankfurt, Frankfurt, Germany.,Institute of Pharmaceutical Chemistry, Goethe University Frankfurt, Frankfurt, Germany.,German Cancer Network (DKTK), Frankfurt, Germany
| | - Feda H Hamdan
- Department of General, Visceral and Pediatric Surgery, University Medical Center Göttingen, Göttingen, Germany.,Gene Regulatory Mechanisms and Molecular Epigenetics Lab, Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota, USA
| | - Benedict-Tilman Berger
- Structural Genomics Consortium, Buchmann Institute for Life Sciences, Goethe University Frankfurt, Frankfurt, Germany.,Institute of Pharmaceutical Chemistry, Goethe University Frankfurt, Frankfurt, Germany
| | - Romain Lucas
- Structural Genomics Consortium, Buchmann Institute for Life Sciences, Goethe University Frankfurt, Frankfurt, Germany.,Institute of Pharmaceutical Chemistry, Goethe University Frankfurt, Frankfurt, Germany.,German Cancer Network (DKTK), Frankfurt, Germany
| | - Dimitrios-IIias Balourdas
- Structural Genomics Consortium, Buchmann Institute for Life Sciences, Goethe University Frankfurt, Frankfurt, Germany.,Institute of Pharmaceutical Chemistry, Goethe University Frankfurt, Frankfurt, Germany
| | - Swetlana Ladigan
- Department of Molecular Gastrointestinal Oncology, Ruhr-University Bochum, Bochum, Germany.,Department of Internal Medicine, Knappschaftskrankenhaus Bochum, Ruhr-University of Bochum, Bochum, Germany
| | - Phyllis F Cheung
- Institute for Developmental Cancer Therapeutics, West German Cancer Center, University Medicine Essen, Essen, Germany.,Division of Solid Tumor Translational Oncology, German Cancer Consortium (DKTK, partner site University Hospital Essen) and German Cancer Research Center, DKFZ, Heidelberg, Germany
| | - Sven-Thorsten Liffers
- Institute for Developmental Cancer Therapeutics, West German Cancer Center, University Medicine Essen, Essen, Germany.,Division of Solid Tumor Translational Oncology, German Cancer Consortium (DKTK, partner site University Hospital Essen) and German Cancer Research Center, DKFZ, Heidelberg, Germany
| | - Marija Trajkovic-Arsic
- Institute for Developmental Cancer Therapeutics, West German Cancer Center, University Medicine Essen, Essen, Germany.,Division of Solid Tumor Translational Oncology, German Cancer Consortium (DKTK, partner site University Hospital Essen) and German Cancer Research Center, DKFZ, Heidelberg, Germany
| | - Bjoern Scheffler
- DKFZ Division of Translational Neurooncology, West German Cancer Center, DKTK partner site University Hospital Essen, Essen, Germany
| | - Andreas C Joerger
- Structural Genomics Consortium, Buchmann Institute for Life Sciences, Goethe University Frankfurt, Frankfurt, Germany.,Institute of Pharmaceutical Chemistry, Goethe University Frankfurt, Frankfurt, Germany.,German Cancer Network (DKTK), Frankfurt, Germany
| | - Stephan A Hahn
- Department of Molecular Gastrointestinal Oncology, Ruhr-University Bochum, Bochum, Germany
| | - Steven A Johnsen
- Department of General, Visceral and Pediatric Surgery, University Medical Center Göttingen, Göttingen, Germany.,Gene Regulatory Mechanisms and Molecular Epigenetics Lab, Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota, USA
| | - Stefan Knapp
- Structural Genomics Consortium, Buchmann Institute for Life Sciences, Goethe University Frankfurt, Frankfurt, Germany.,Institute of Pharmaceutical Chemistry, Goethe University Frankfurt, Frankfurt, Germany.,German Cancer Network (DKTK), Frankfurt, Germany
| | - Jens T Siveke
- Institute for Developmental Cancer Therapeutics, West German Cancer Center, University Medicine Essen, Essen, Germany.,Division of Solid Tumor Translational Oncology, German Cancer Consortium (DKTK, partner site University Hospital Essen) and German Cancer Research Center, DKFZ, Heidelberg, Germany
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28
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Kulka LAM, Fangmann PV, Panfilova D, Olzscha H. Impact of HDAC Inhibitors on Protein Quality Control Systems: Consequences for Precision Medicine in Malignant Disease. Front Cell Dev Biol 2020; 8:425. [PMID: 32582706 PMCID: PMC7291789 DOI: 10.3389/fcell.2020.00425] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2020] [Accepted: 05/07/2020] [Indexed: 12/21/2022] Open
Abstract
Lysine acetylation is one of the major posttranslational modifications (PTM) in human cells and thus needs to be tightly regulated by the writers of this process, the histone acetyl transferases (HAT), and the erasers, the histone deacetylases (HDAC). Acetylation plays a crucial role in cell signaling, cell cycle control and in epigenetic regulation of gene expression. Bromodomain (BRD)-containing proteins are readers of the acetylation mark, enabling them to transduce the modification signal. HDAC inhibitors (HDACi) have been proven to be efficient in hematologic malignancies with four of them being approved by the FDA. However, the mechanisms by which HDACi exert their cytotoxicity are only partly resolved. It is likely that HDACi alter the acetylation pattern of cytoplasmic proteins, contributing to their anti-cancer potential. Recently, it has been demonstrated that various protein quality control (PQC) systems are involved in recognizing the altered acetylation pattern upon HDACi treatment. In particular, molecular chaperones, the ubiquitin proteasome system (UPS) and autophagy are able to sense the structurally changed proteins, providing additional targets. Recent clinical studies of novel HDACi have proven that proteins of the UPS may serve as biomarkers for stratifying patient groups under HDACi regimes. In addition, members of the PQC systems have been shown to modify the epigenetic readout of HDACi treated cells and alter proteostasis in the nucleus, thus contributing to changing gene expression profiles. Bromodomain (BRD)-containing proteins seem to play a potent role in transducing the signaling process initiating apoptosis, and many clinical trials are under way to test BRD inhibitors. Finally, it has been demonstrated that HDACi treatment leads to protein misfolding and aggregation, which may explain the effect of panobinostat, the latest FDA approved HDACi, in combination with the proteasome inhibitor bortezomib in multiple myeloma. Therefore, proteins of these PQC systems provide valuable targets for precision medicine in cancer. In this review, we give an overview of the impact of HDACi treatment on PQC systems and their implications for malignant disease. We exemplify the development of novel HDACi and how affected proteins belonging to PQC can be used to determine molecular signatures and utilized in precision medicine.
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Affiliation(s)
- Linda Anna Michelle Kulka
- Medical Faculty, Institute of Physiological Chemistry, Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany
| | - Pia-Victoria Fangmann
- Medical Faculty, Institute of Physiological Chemistry, Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany
| | - Diana Panfilova
- Medical Faculty, Institute of Physiological Chemistry, Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany
| | - Heidi Olzscha
- Medical Faculty, Institute of Physiological Chemistry, Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany
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29
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Design, synthesis, and biological evaluation of dual targeting inhibitors of histone deacetylase 6/8 and bromodomain BRPF1. Eur J Med Chem 2020; 200:112338. [PMID: 32497960 DOI: 10.1016/j.ejmech.2020.112338] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Revised: 04/09/2020] [Accepted: 04/13/2020] [Indexed: 01/19/2023]
Abstract
Histone modifying proteins, specifically histone deacetylases (HDACs) and bromodomains, have emerged as novel promising targets for anticancer therapy. In the current work, based on available crystal structures and docking studies, we designed dual inhibitors of both HDAC6/8 and the bromodomain and PHD finger containing protein 1 (BRPF1). Biochemical and biophysical tests showed that compounds 23a,b and 37 are nanomolar inhibitors of both target proteins. Detailed structure-activity relationships were deduced for the synthesized inhibitors which were supported by extensive docking and molecular dynamics studies. Cellular testing in acute myeloid leukemia (AML) cells showed only a weak effect, most probably because of the poor permeability of the inhibitors. We also aimed to analyse the target engagement and the cellular activity of the novel inhibitors by determining the protein acetylation levels in cells by western blotting (tubulin vs histone acetylation), and by assessing their effects on various cancer cell lines.
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30
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Liu T, Wan Y, Xiao Y, Xia C, Duan G. Dual-Target Inhibitors Based on HDACs: Novel Antitumor Agents for Cancer Therapy. J Med Chem 2020; 63:8977-9002. [PMID: 32320239 DOI: 10.1021/acs.jmedchem.0c00491] [Citation(s) in RCA: 103] [Impact Index Per Article: 25.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Histone deacetylases (HDACs) play an important role in regulating target gene expression. They have been highlighted as a novel category of anticancer targets, and their inhibition can induce apoptosis, differentiation, and growth arrest in cancer cells. In view of the fact that HDAC inhibitors and other antitumor agents, such as BET inhibitors, topoisomerase inhibitors, and RTK pathway inhibitors, exert a synergistic effect on cellular processes in cancer cells, the combined inhibition of two targets is regarded as a rational strategy to improve the effectiveness of these single-target drugs for cancer treatment. In this review, we discuss the theoretical basis for designing HDAC-involved dual-target drugs and provide insight into the structure-activity relationships of these dual-target agents.
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Affiliation(s)
- Tingting Liu
- Department of Medicinal Chemistry, School of Pharmacy, Shandong First Medical University & Shandong Academy of Medical Sciences, Taian 271016, Shandong, China
| | - Yichao Wan
- Key Laboratory of Theoretical Organic Chemistry and Functional Molecule, Ministry of Education, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, Hunan, China
| | - Yuliang Xiao
- Department of Medicinal Chemistry, School of Pharmacy, Shandong First Medical University & Shandong Academy of Medical Sciences, Taian 271016, Shandong, China
| | - Chengcai Xia
- Department of Medicinal Chemistry, School of Pharmacy, Shandong First Medical University & Shandong Academy of Medical Sciences, Taian 271016, Shandong, China
| | - Guiyun Duan
- Department of Medicinal Chemistry, School of Pharmacy, Shandong First Medical University & Shandong Academy of Medical Sciences, Taian 271016, Shandong, China
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31
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Kong D, Moon PJ, Bsharat O, Lundgren RJ. Direct Catalytic Decarboxylative Amination of Aryl Acetic Acids. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201912518] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Duanyang Kong
- Department of Chemistry University of Alberta Edmonton Alberta T6G 2G2 Canada
| | - Patrick J. Moon
- Department of Chemistry University of Alberta Edmonton Alberta T6G 2G2 Canada
| | - Odey Bsharat
- Department of Chemistry University of Alberta Edmonton Alberta T6G 2G2 Canada
| | - Rylan J. Lundgren
- Department of Chemistry University of Alberta Edmonton Alberta T6G 2G2 Canada
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32
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Kong D, Moon PJ, Bsharat O, Lundgren RJ. Direct Catalytic Decarboxylative Amination of Aryl Acetic Acids. Angew Chem Int Ed Engl 2019; 59:1313-1319. [DOI: 10.1002/anie.201912518] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 10/23/2019] [Indexed: 11/08/2022]
Affiliation(s)
- Duanyang Kong
- Department of Chemistry University of Alberta Edmonton Alberta T6G 2G2 Canada
| | - Patrick J. Moon
- Department of Chemistry University of Alberta Edmonton Alberta T6G 2G2 Canada
| | - Odey Bsharat
- Department of Chemistry University of Alberta Edmonton Alberta T6G 2G2 Canada
| | - Rylan J. Lundgren
- Department of Chemistry University of Alberta Edmonton Alberta T6G 2G2 Canada
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33
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Manzotti G, Ciarrocchi A, Sancisi V. Inhibition of BET Proteins and Histone Deacetylase (HDACs): Crossing Roads in Cancer Therapy. Cancers (Basel) 2019; 11:cancers11030304. [PMID: 30841549 PMCID: PMC6468908 DOI: 10.3390/cancers11030304] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Revised: 02/18/2019] [Accepted: 02/26/2019] [Indexed: 12/14/2022] Open
Abstract
Histone DeACetylases (HDACs) are enzymes that remove acetyl groups from histones and other proteins, regulating the expression of target genes. Pharmacological inhibition of these enzymes re-shapes chromatin acetylation status, confusing boundaries between transcriptionally active and quiescent chromatin. This results in reinducing expression of silent genes while repressing highly transcribed genes. Bromodomain and Extraterminal domain (BET) proteins are readers of acetylated chromatin status and accumulate on transcriptionally active regulatory elements where they serve as scaffold for the building of transcription-promoting complexes. The expression of many well-known oncogenes relies on BET proteins function, indicating BET inhibition as a strategy to counteract their activity. BETi and HDACi share many common targets and affect similar cellular processes to the point that combined inhibition of both these classes of proteins is regarded as a strategy to improve the effectiveness of these drugs in cancer. In this work, we aim to discuss the molecular basis of the interplay between HDAC and BET proteins, pointing at chromatin acetylation as a crucial node of their functional interaction. We will also describe the state of the art of their dual inhibition in cancer therapy. Finally, starting from their mechanism of action we will provide a speculative perspective on how these drugs may be employed in combination with standard therapies to improve effectiveness and/or overcome resistance.
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Affiliation(s)
- Gloria Manzotti
- Laboratory of Translational Research, Azienda Unità Sanitaria Locale-IRCCS di Reggio Emilia, 42122 Reggio Emilia, Italy.
| | - Alessia Ciarrocchi
- Laboratory of Translational Research, Azienda Unità Sanitaria Locale-IRCCS di Reggio Emilia, 42122 Reggio Emilia, Italy.
| | - Valentina Sancisi
- Laboratory of Translational Research, Azienda Unità Sanitaria Locale-IRCCS di Reggio Emilia, 42122 Reggio Emilia, Italy.
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34
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Herrera-Vázquez FS, Hernández-Luis F, Medina Franco JL. Quinazolines as inhibitors of chromatin-associated proteins in histones. Med Chem Res 2019. [DOI: 10.1007/s00044-019-02300-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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35
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Luan Y, Li J, Bernatchez JA, Li R. Kinase and Histone Deacetylase Hybrid Inhibitors for Cancer Therapy. J Med Chem 2018; 62:3171-3183. [PMID: 30418766 DOI: 10.1021/acs.jmedchem.8b00189] [Citation(s) in RCA: 94] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Histone deacetylases (HDACs), encompassing at least 18 members, are promising targets for anticancer drug discovery and development. To date, five histone deacetylase inhibitors (HDACis) have been approved for cancer treatment, and numerous others are undergoing clinical trials. It has been well validated that an agent that can simultaneously and effectively inhibit two or more targets may offer greater therapeutic benefits over single-acting agents in preventing resistance to treatment and in potentiating synergistic effects. A prime example of a bifunctional agent is the hybrid HDAC inhibitor. In this perspective, the authors review the majority of reported kinase/HDAC hybrid inhibitors.
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Affiliation(s)
- Yepeng Luan
- Department of Medicinal Chemistry, School of Pharmacy , Qingdao University , Qingdao 266071 , Shandong Province , China
| | | | | | - Rongshi Li
- Department of Medicinal Chemistry, School of Pharmacy , Qingdao University , Qingdao 266071 , Shandong Province , China.,UNMC Center for Drug Discovery, Department of Pharmaceutical Sciences, College of Pharmacy, Fred and Pamela Buffett Cancer Center, and Center for Staphylococcal Research , University of Nebraska Medical Center , Omaha , Nebraska 68198 , United States
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36
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Badamchi-Zadeh A, Moynihan KD, Larocca RA, Aid M, Provine NM, Iampietro MJ, Kinnear E, Penaloza-MacMaster P, Abbink P, Blass E, Tregoning JS, Irvine DJ, Barouch DH. Combined HDAC and BET Inhibition Enhances Melanoma Vaccine Immunogenicity and Efficacy. THE JOURNAL OF IMMUNOLOGY 2018; 201:2744-2752. [PMID: 30249811 DOI: 10.4049/jimmunol.1800885] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Accepted: 08/22/2018] [Indexed: 12/12/2022]
Abstract
The combined inhibition of histone deacetylases (HDAC) and the proteins of the bromodomain and extraterminal (BET) family have recently shown therapeutic efficacy against melanoma, pancreatic ductal adenocarcinoma, testicular, and lymphoma cancers in murine studies. However, in such studies, the role of the immune system in therapeutically controlling these cancers has not been explored. We sought to investigate the effect of the HDAC inhibitor romidepsin (RMD) and the BET inhibitor IBET151, both singly and in combination, on vaccine-elicited immune responses. C57BL/6 mice were immunized with differing vaccine systems (adenoviral, protein) in prime-boost regimens under treatment with RMD, IBET151, or RMD+IBET151. The combined administration of RMD+IBET151 during vaccination resulted in a significant increase in the frequency and number of Ag-specific CD8+ T cells. RMD+IBET151 treatment significantly increased the frequency of vaccine-elicited IFN-γ+ splenic CD8+ T cells and conferred superior therapeutic and prophylactic protection against B16-OVA melanoma. RNA sequencing analyses revealed strong transcriptional similarity between RMD+IBET151 and untreated Ag-specific CD8+ T cells except in apoptosis and IL-6 signaling-related genes that were differentially expressed. Serum IL-6 was significantly increased in vivo following RMD+IBET151 treatment, with recombinant IL-6 administration replicating the effect of RMD+IBET151 treatment on vaccine-elicited CD8+ T cell responses. IL-6 sufficiency for protection was not assessed. Combined HDAC and BET inhibition resulted in greater vaccine-elicited CD8+ T cell responses and enhanced therapeutic and prophylactic protection against B16-OVA melanoma. Increased IL-6 production and the differential expression of pro- and anti-apoptotic genes following RMD+IBET151 treatment are likely contributors to the enhanced cancer vaccine responses.
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Affiliation(s)
- Alexander Badamchi-Zadeh
- Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215
| | - Kelly D Moynihan
- Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139
| | - Rafael A Larocca
- Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215
| | - Malika Aid
- Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215
| | - Nicholas M Provine
- Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215
| | - M Justin Iampietro
- Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215
| | - Ekaterina Kinnear
- Department of Medicine, Imperial College London, London W2 1PG, United Kingdom
| | - Pablo Penaloza-MacMaster
- Department of Microbiology-Immunology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611
| | - Peter Abbink
- Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215
| | - Eryn Blass
- Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215
| | - John S Tregoning
- Department of Medicine, Imperial College London, London W2 1PG, United Kingdom
| | - Darrell J Irvine
- Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139.,Ragon Institute of MGH, MIT and Harvard, Cambridge, MA 02139; and.,Howard Hughes Medical Institute, Chevy Chase, MD 20815
| | - Dan H Barouch
- Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215; .,Ragon Institute of MGH, MIT and Harvard, Cambridge, MA 02139; and
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37
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Giblin KA, Hughes SJ, Boyd H, Hansson P, Bender A. Prospectively Validated Proteochemometric Models for the Prediction of Small-Molecule Binding to Bromodomain Proteins. J Chem Inf Model 2018; 58:1870-1888. [DOI: 10.1021/acs.jcim.8b00400] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kathryn A. Giblin
- Centre for Molecular Informatics, Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, U.K
| | - Samantha J. Hughes
- Computational Chemistry, Oncology, IMED Biotech Unit, AstraZeneca, Cambridge CB10 1XL, U.K
| | - Helen Boyd
- Discovery Biology, Discovery Sciences, IMED Biotech Unit, AstraZeneca, Gothenburg 431 50 SE, Sweden
| | - Pia Hansson
- Discovery Biology, Discovery Sciences, IMED Biotech Unit, AstraZeneca, Gothenburg 431 50 SE, Sweden
| | - Andreas Bender
- Centre for Molecular Informatics, Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, U.K
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38
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Hesham HM, Lasheen DS, Abouzid KA. Chimeric HDAC inhibitors: Comprehensive review on the HDAC-based strategies developed to combat cancer. Med Res Rev 2018; 38:2058-2109. [DOI: 10.1002/med.21505] [Citation(s) in RCA: 81] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Revised: 03/29/2018] [Accepted: 04/11/2018] [Indexed: 12/11/2022]
Affiliation(s)
- Heba M. Hesham
- Faculty of Pharmacy, Pharmaceutical Chemistry Department; Ain Shams University; Abbassia Cairo Egypt
| | - Deena S. Lasheen
- Faculty of Pharmacy, Pharmaceutical Chemistry Department; Ain Shams University; Abbassia Cairo Egypt
| | - Khaled A.M. Abouzid
- Faculty of Pharmacy, Pharmaceutical Chemistry Department; Ain Shams University; Abbassia Cairo Egypt
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39
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Shadrick WR, Slavish PJ, Chai SC, Waddell B, Connelly M, Low JA, Tallant C, Young BM, Bharatham N, Knapp S, Boyd VA, Morfouace M, Roussel MF, Chen T, Lee RE, Kiplin Guy R, Shelat AA, Potter PM. Exploiting a water network to achieve enthalpy-driven, bromodomain-selective BET inhibitors. Bioorg Med Chem 2018; 26:25-36. [PMID: 29170024 PMCID: PMC5733700 DOI: 10.1016/j.bmc.2017.10.042] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2017] [Revised: 10/20/2017] [Accepted: 10/30/2017] [Indexed: 12/24/2022]
Abstract
Within the last decade, the Bromodomain and Extra-Terminal domain family (BET) of proteins have emerged as promising drug targets in diverse clinical indications including oncology, auto-immune disease, heart failure, and male contraception. The BET family consists of four isoforms (BRD2, BRD3, BRD4, and BRDT/BRDT6) which are distinguished by the presence of two tandem bromodomains (BD1 and BD2) that independently recognize acetylated-lysine (KAc) residues and appear to have distinct biological roles. BET BD1 and BD2 bromodomains differ at five positions near the substrate binding pocket: the variation in the ZA channel induces different water networks nearby. We designed a set of congeneric 2- and 3-heteroaryl substituted tetrahydroquinolines (THQ) to differentially engage bound waters in the ZA channel with the goal of achieving bromodomain selectivity. SJ830599 (9) showed modest, but consistent, selectivity for BRD2-BD2. Using isothermal titration calorimetry, we showed that the binding of all THQ analogs in our study to either of the two bromodomains was enthalpy driven. Remarkably, the binding of 9 to BRD2-BD2 was marked by negative entropy and was entirely driven by enthalpy, consistent with significant restriction of conformational flexibility and/or engagement with bound waters. Co-crystallography studies confirmed that 9 did indeed stabilize a water-mediated hydrogen bond network. Finally, we report that 9 retained cytotoxicity against several pediatric cancer cell lines with EC50 values comparable to BET inhibitor (BETi) clinical candidates.
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Affiliation(s)
- William R Shadrick
- Department of Chemical Biology & Therapeutics, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Peter J Slavish
- Department of Chemical Biology & Therapeutics, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Sergio C Chai
- Department of Chemical Biology & Therapeutics, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Brett Waddell
- Molecular Interaction Analysis Shared Resource, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Michele Connelly
- Department of Chemical Biology & Therapeutics, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Jonathan A Low
- Department of Chemical Biology & Therapeutics, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Cynthia Tallant
- Target Discovery Institute, University of Oxford, NDM Research Building, Roosevelt Drive, Oxford OX3 7FZ, UK; Structural Genomics Consortium, University of Oxford, Old Road Campus Research Building, Roosevelt Drive, Oxford OX3 7DQ, UK
| | - Brandon M Young
- Department of Chemical Biology & Therapeutics, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Nagakumar Bharatham
- Department of Chemical Biology & Therapeutics, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Stefan Knapp
- Target Discovery Institute, University of Oxford, NDM Research Building, Roosevelt Drive, Oxford OX3 7FZ, UK; Structural Genomics Consortium, University of Oxford, Old Road Campus Research Building, Roosevelt Drive, Oxford OX3 7DQ, UK
| | - Vincent A Boyd
- Department of Chemical Biology & Therapeutics, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Marie Morfouace
- Department of Tumor Cell Biology, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Martine F Roussel
- Department of Tumor Cell Biology, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Taosheng Chen
- Department of Chemical Biology & Therapeutics, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Richard E Lee
- Department of Chemical Biology & Therapeutics, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - R Kiplin Guy
- Department of Chemical Biology & Therapeutics, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Anang A Shelat
- Department of Chemical Biology & Therapeutics, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA.
| | - Philip M Potter
- Department of Chemical Biology & Therapeutics, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
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40
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Targeting the cancer epigenome: synergistic therapy with bromodomain inhibitors. Drug Discov Today 2017; 23:76-89. [PMID: 28943305 DOI: 10.1016/j.drudis.2017.09.011] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2016] [Revised: 08/21/2017] [Accepted: 09/14/2017] [Indexed: 11/21/2022]
Abstract
Epigenetic and genomic alterations regulate the transcriptional landscape of cells during cancer onset and progression. Recent clinical studies targeting the epigenetic 'readers' (bromodomains) for cancer therapy have established the effectiveness of bromodomain (BRD) and extraterminal (BET) inhibitors in treating several types of cancer. In this review, we discuss key mechanisms of BET inhibition and synergistic combinations of BET inhibitors with histone deacetylase inhibitors (HDACi), histone methyltransferase inhibitors (HMTi), DNA methyltransferase inhibitors (DNMTi), kinase, B-cell lymphoma 2 (Bcl-2) and proteosome inhibitors, and immunomodulatory drugs for cancer therapy. We also highlight the potential of such combinations to overcome drug resistance, and the evolving approaches to developing novel BET inhibitors.
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41
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Yan G, Hou M, Luo J, Pu C, Hou X, Lan S, Li R. Pharmacophore-based virtual screening, molecular docking, molecular dynamics simulation, and biological evaluation for the discovery of novel BRD4 inhibitors. Chem Biol Drug Des 2017; 91:478-490. [PMID: 28901664 DOI: 10.1111/cbdd.13109] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Revised: 08/21/2017] [Accepted: 08/22/2017] [Indexed: 02/05/2023]
Abstract
Bromodomain is a recognition module in the signal transduction of acetylated histone. BRD4, one of the bromodomain members, is emerging as an attractive therapeutic target for several types of cancer. Therefore, in this study, an attempt has been made to screen compounds from an integrated database containing 5.5 million compounds for BRD4 inhibitors using pharmacophore-based virtual screening, molecular docking, and molecular dynamics simulations. As a result, two molecules of twelve hits were found to be active in bioactivity tests. Among the molecules, compound 5 exhibited potent anticancer activity, and the IC50 values against human cancer cell lines MV4-11, A375, and HeLa were 4.2, 7.1, and 11.6 μm, respectively. After that, colony formation assay, cell cycle, apoptosis analysis, wound-healing migration assay, and Western blotting were carried out to learn the bioactivity of compound 5.
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Affiliation(s)
- Guoyi Yan
- Cancer Center, West China Hospital, Sichuan University, and Collaborative Innovation Center for Biotherapy, Sichuan, China
| | - Manzhou Hou
- Cancer Center, West China Hospital, Sichuan University, and Collaborative Innovation Center for Biotherapy, Sichuan, China
| | - Jiang Luo
- Cancer Center, West China Hospital, Sichuan University, and Collaborative Innovation Center for Biotherapy, Sichuan, China
| | - Chunlan Pu
- Cancer Center, West China Hospital, Sichuan University, and Collaborative Innovation Center for Biotherapy, Sichuan, China
| | - Xueyan Hou
- Cancer Center, West China Hospital, Sichuan University, and Collaborative Innovation Center for Biotherapy, Sichuan, China
| | - Suke Lan
- Cancer Center, West China Hospital, Sichuan University, and Collaborative Innovation Center for Biotherapy, Sichuan, China
| | - Rui Li
- Cancer Center, West China Hospital, Sichuan University, and Collaborative Innovation Center for Biotherapy, Sichuan, China
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42
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Ali I, Lee J, Go A, Choi G, Lee K. Discovery of novel [1,2,4]triazolo[4,3-a]quinoxaline aminophenyl derivatives as BET inhibitors for cancer treatment. Bioorg Med Chem Lett 2017; 27:4606-4613. [PMID: 28939121 DOI: 10.1016/j.bmcl.2017.09.025] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Revised: 09/06/2017] [Accepted: 09/12/2017] [Indexed: 11/28/2022]
Abstract
Bromodomain and extra-terminal (BET) proteins, a class of epigenetic reader domains has emerged as a promising new target class for small molecule drug discovery for the treatment of cancer, inflammatory, and autoimmune diseases. Starting from in silico screening campaign, herein we report the discovery of novel BET inhibitors based on [1,2,4]triazolo[4,3-a]quinoxaline scaffold and their biological evaluation. The hit compound was optimized using the medicinal chemistry approach to the lead compound with excellent inhibitory activities against BRD4 in the binding assay. The substantial antiproliferative activities in human cancer cell lines, promising drug-like properties, and the selectivity for the BET family make the lead compound (13) as a novel BRD4 inhibitor motif for anti-cancer drug discovery.
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Affiliation(s)
- Imran Ali
- Bio-Organic Science Division, Korea Research Institute of Chemical Technology, PO Box 107, Daejeon 34114, Republic of Korea; Medicinal Chemistry & Pharmacology, Korea University of Science & Technology, Daejeon 34113, Republic of Korea
| | - Jooyun Lee
- Bio-Organic Science Division, Korea Research Institute of Chemical Technology, PO Box 107, Daejeon 34114, Republic of Korea
| | - Areum Go
- Bio-Organic Science Division, Korea Research Institute of Chemical Technology, PO Box 107, Daejeon 34114, Republic of Korea; Medicinal Chemistry & Pharmacology, Korea University of Science & Technology, Daejeon 34113, Republic of Korea
| | - Gildon Choi
- Bio-Organic Science Division, Korea Research Institute of Chemical Technology, PO Box 107, Daejeon 34114, Republic of Korea; Medicinal Chemistry & Pharmacology, Korea University of Science & Technology, Daejeon 34113, Republic of Korea.
| | - Kwangho Lee
- Bio-Organic Science Division, Korea Research Institute of Chemical Technology, PO Box 107, Daejeon 34114, Republic of Korea; Medicinal Chemistry & Pharmacology, Korea University of Science & Technology, Daejeon 34113, Republic of Korea.
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43
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Structure-based design, synthesis and in vitro antiproliferative effects studies of novel dual BRD4/HDAC inhibitors. Bioorg Med Chem Lett 2017; 27:4051-4055. [DOI: 10.1016/j.bmcl.2017.07.054] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2017] [Revised: 07/09/2017] [Accepted: 07/20/2017] [Indexed: 01/25/2023]
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44
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What structural modifications can be used for BRD4 inhibitors for their use in leukemia therapy? Future Med Chem 2017. [PMID: 28635318 DOI: 10.4155/fmc-2017-0084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
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45
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Targeting Class I Histone Deacetylases in a "Complex" Environment. Trends Pharmacol Sci 2017; 38:363-377. [PMID: 28139258 DOI: 10.1016/j.tips.2016.12.006] [Citation(s) in RCA: 120] [Impact Index Per Article: 17.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2016] [Revised: 12/16/2016] [Accepted: 12/21/2016] [Indexed: 01/22/2023]
Abstract
Histone deacetylase (HDAC) inhibitors are proven anticancer therapeutics and have potential in the treatment of many other diseases including HIV infection, Alzheimer's disease, and Friedreich's ataxia. A problem with the currently available HDAC inhibitors is that they have limited specificity and target multiple deacetylases. Designing isoform-selective inhibitors has proven challenging due to similarities in the structure and chemistry of HDAC active sites. However, the fact that HDACs 1, 2, and 3 are recruited to several large multi-subunit complexes, each with particular biological functions, raises the possibility of specifically inhibiting individual complexes. This may be assisted by recent structural and functional information about the assembly of these complexes. Here, we review the available structural information and discuss potential targeting strategies.
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46
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de Lera AR, Ganesan A. Epigenetic polypharmacology: from combination therapy to multitargeted drugs. Clin Epigenetics 2016; 8:105. [PMID: 27752293 PMCID: PMC5062873 DOI: 10.1186/s13148-016-0271-9] [Citation(s) in RCA: 99] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2016] [Accepted: 09/21/2016] [Indexed: 12/20/2022] Open
Abstract
The modern drug discovery process has largely focused its attention in the so-called magic bullets, single chemical entities that exhibit high selectivity and potency for a particular target. This approach was based on the assumption that the deregulation of a protein was causally linked to a disease state, and the pharmacological intervention through inhibition of the deregulated target was able to restore normal cell function. However, the use of cocktails or multicomponent drugs to address several targets simultaneously is also popular to treat multifactorial diseases such as cancer and neurological disorders. We review the state of the art with such combinations that have an epigenetic target as one of their mechanisms of action. Epigenetic drug discovery is a rapidly advancing field, and drugs targeting epigenetic enzymes are in the clinic for the treatment of hematological cancers. Approved and experimental epigenetic drugs are undergoing clinical trials in combination with other therapeutic agents via fused or linked pharmacophores in order to benefit from synergistic effects of polypharmacology. In addition, ligands are being discovered which, as single chemical entities, are able to modulate multiple epigenetic targets simultaneously (multitarget epigenetic drugs). These multiple ligands should in principle have a lower risk of drug-drug interactions and drug resistance compared to cocktails or multicomponent drugs. This new generation may rival the so-called magic bullets in the treatment of diseases that arise as a consequence of the deregulation of multiple signaling pathways provided the challenge of optimization of the activities shown by the pharmacophores with the different targets is addressed.
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Affiliation(s)
- Angel R de Lera
- Departamento de Química Orgánica, Facultade de Química, Universidade de Vigo, CINBIO and IIS Galicia Sur, 36310 Vigo, Spain
| | - A Ganesan
- School of Pharmacy, University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ UK
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47
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Weigt D, Hopf C, Médard G. Studying epigenetic complexes and their inhibitors with the proteomics toolbox. Clin Epigenetics 2016; 8:76. [PMID: 27437033 PMCID: PMC4950666 DOI: 10.1186/s13148-016-0244-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Accepted: 07/05/2016] [Indexed: 12/27/2022] Open
Abstract
Some epigenetic modifier proteins have become validated clinical targets. With a few small molecule inhibitors already approved by national health administrations and many more in the pharmaceutical industry pipelines, there is a need for technologies that can promote full comprehension of the molecular action of these drugs. Proteomics, with its relatively unbiased nature, can contribute to a thorough understanding of the complexity of the megadalton complexes, which write, read and erase the histone code, and it can help study the on-target and off-target effect of the drugs designed to modulate their action. This review on the one hand gathers the published affinity probes able to decipher small molecule targets and off-targets in a close-to-native environment. These are small molecule analogues of epigenetic drugs conceived as protein target enrichment tools after they have engaged them in cells or lysates. Such probes, which have been designed for deacetylases, bromodomains, demethylases, and methyltransferases not only enrich their direct protein targets but also their stable interactors, which can be identified by mass spectrometry. Hence, they constitute a tool to study the epigenetic complexes together with other techniques also reviewed here: immunoaffinity purification with antibodies against native protein complex constituents or epitope tags, affinity matrices designed to bind recombinantly tagged protein, and enrichment of the complexes using histone tail peptides as baits. We expect that this toolbox will be adopted by more and more researchers willing to harness the spectacular advances in mass spectrometry to the epigenetic field.
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Affiliation(s)
- David Weigt
- />Center for Applied Research in Biomedical Mass Spectrometry (ABIMAS), Mannheim University of Applied Sciences, Paul-Wittsack-Str. 10, 68163 Mannheim, Germany
- />HBIGS International Graduate School of Molecular and Cellular Biology, Heidelberg University, Im Neuenheimer Feld 501, 69120 Heidelberg, Germany
| | - Carsten Hopf
- />Center for Applied Research in Biomedical Mass Spectrometry (ABIMAS), Mannheim University of Applied Sciences, Paul-Wittsack-Str. 10, 68163 Mannheim, Germany
- />HBIGS International Graduate School of Molecular and Cellular Biology, Heidelberg University, Im Neuenheimer Feld 501, 69120 Heidelberg, Germany
| | - Guillaume Médard
- />Chair of Proteomics and Bioanalytics, Technical University of Munich, Emil Erlenmeyer Forum 5, 85354 Freising, Germany
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Targeting epigenetic reader and eraser: Rational design, synthesis and in vitro evaluation of dimethylisoxazoles derivatives as BRD4/HDAC dual inhibitors. Bioorg Med Chem Lett 2016; 26:2931-2935. [PMID: 27142751 DOI: 10.1016/j.bmcl.2016.04.034] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2016] [Revised: 03/30/2016] [Accepted: 04/14/2016] [Indexed: 12/15/2022]
Abstract
The bromodomain protein module and histone deacetylase (HDAC), which recognize and remove acetylated lysine, respectively, have emerged as important epigenetic therapeutic targets in cancer treatments. Herein we presented a novel design approach for cancer drug development by combination of bromodomain and HDAC inhibitory activity in one molecule. The designed compounds were synthesized which showed inhibitory activity against bromodomain 4 and HDAC1. The representative dual bromodomain/HDAC inhibitors, compound 11 and 12, showed potent antiproliferative activities against human leukaemia cell line K562 and MV4-11 in cellular assays. This work may lay the foundation for developing dual bromodomain/HDAC inhibitors as potential anticancer therapeutics.
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49
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Ganesan A. Multitarget Drugs: an Epigenetic Epiphany. ChemMedChem 2016; 11:1227-41. [PMID: 26891251 DOI: 10.1002/cmdc.201500394] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2015] [Revised: 01/28/2016] [Indexed: 12/22/2022]
Abstract
Epigenetics refers to changes in a biological phenotype that are not due to an underlying change in genotype. In eukaryotes, epigenetics involves a set of chemical modifications of the DNA and the histone proteins in nucleosomes. These dynamic changes are carried out by enzymes and modulate protein-protein and protein-nucleic acid interactions to determine whether specific genes are expressed or silenced. Both the epigenetic enzymes and recognition domains are currently important drug discovery targets, particularly for the treatment of cancer. This review summarizes the progress of epigenetic targets that have reached a clinical stage: DNA methyltransferases, histone deacetylases, lysine methyltransferases, lysine demethylases, and bromodomains; this is followed by a comprehensive survey of multitarget drugs that have included an epigenetic target as one of their mechanisms of action.
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Affiliation(s)
- A Ganesan
- School of Pharmacy, University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ, UK.
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50
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Noguchi-Yachide T. BET Bromodomain as a Target of Epigenetic Therapy. Chem Pharm Bull (Tokyo) 2016; 64:540-7. [DOI: 10.1248/cpb.c16-00225] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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