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Wu D, Zhang Z, Chen X, Yan Y, Liu X. Angel or Devil ? - CDK8 as the new drug target. Eur J Med Chem 2020; 213:113043. [PMID: 33257171 DOI: 10.1016/j.ejmech.2020.113043] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Revised: 11/16/2020] [Accepted: 11/17/2020] [Indexed: 12/19/2022]
Abstract
Cyclin-dependent kinase 8 (CDK8) plays an momentous role in transcription regulation by forming kinase module or transcription factor phosphorylation. A large number of evidences have identified CDK8 as an important factor in cancer occurrence and development. In addition, CDK8 also participates in the regulation of cancer cell stress response to radiotherapy and chemotherapy, assists tumor cell invasion, metastasis, and drug resistance. Therefore, CDK8 is regarded as a promising target for cancer therapy. Most studies in recent years supported the role of CDK8 as a carcinogen, however, under certain conditions, CDK8 exists as a tumor suppressor. The functional diversity of CDK8 and its exceptional role in different types of cancer have aroused great interest from scientists but even more controversy during the discovery of CDK8 inhibitors. In addition, CDK8 appears to be an effective target for inflammation diseases and immune system disorders. Therefore, we summarized the research results of CDK8, involving physiological/pathogenic mechanisms and the development status of compounds targeting CDK8, provide a reference for the feasibility evaluation of CDK8 as a therapeutic target, and guidance for researchers who are involved in this field for the first time.
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Affiliation(s)
- Dan Wu
- School of Biological Engineering, Hefei Technology College, Hefei, 238000, PR China
| | - Zhaoyan Zhang
- School of Pharmacy, Anhui Province Key Laboratory of Major Autoimmune Diseases, Anhui Institute of Innovative Drugs, Anhui Medical University, Hefei, 230032, PR China
| | - Xing Chen
- School of Pharmacy, Anhui Province Key Laboratory of Major Autoimmune Diseases, Anhui Institute of Innovative Drugs, Anhui Medical University, Hefei, 230032, PR China
| | - Yaoyao Yan
- School of Pharmacy, Anhui Province Key Laboratory of Major Autoimmune Diseases, Anhui Institute of Innovative Drugs, Anhui Medical University, Hefei, 230032, PR China
| | - Xinhua Liu
- School of Pharmacy, Anhui Province Key Laboratory of Major Autoimmune Diseases, Anhui Institute of Innovative Drugs, Anhui Medical University, Hefei, 230032, PR China.
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2
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Indu S, Kaliappan KP. Synthetic approaches towards cortistatins: evolution and progress through its ages. Org Biomol Chem 2020; 18:3965-3995. [PMID: 32420567 DOI: 10.1039/d0ob00770f] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Cortistatins are a family of steroidal alkaloids with a unique pentacyclic skeleton, having immensely potent anti-angiogenetic activities. Given the scarcity in the natural availability of these compounds, their syntheses became major attractions in organic chemistry. Along with total synthesis of the most potent congeners in the family: cortistatins A and J, the synthesis of two other members have been successfully completed, while various other analogues have also been designed with variable degrees of biological activities. This review is an exhaustive coverage of the significant attempts towards constructing this highly challenging molecule and also aims to highlight the deep understanding of the structure-activity relationships of these compounds, which have been garnered over time.
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Affiliation(s)
- Satrajit Indu
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India.
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3
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Ma D, Chen X, Shen XB, Sheng LQ, Liu XH. Binding patterns and structure–activity relationship of CDK8 inhibitors. Bioorg Chem 2020; 96:103624. [DOI: 10.1016/j.bioorg.2020.103624] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Revised: 01/22/2020] [Accepted: 01/23/2020] [Indexed: 12/11/2022]
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4
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Didehydro-Cortistatin A Inhibits HIV-1 by Specifically Binding to the Unstructured Basic Region of Tat. mBio 2019; 10:mBio.02662-18. [PMID: 30723126 PMCID: PMC6368365 DOI: 10.1128/mbio.02662-18] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The intrinsically disordered HIV-1 Tat protein binds the viral RNA transactivation response structure (TAR), which recruits transcriptional cofactors, amplifying viral mRNA expression. Limited Tat transactivation correlates with HIV-1 latency. Unfortunately, Tat inhibitors are not clinically available. The small molecule didehydro-cortistatin A (dCA) inhibits Tat, locking HIV-1 in persistent latency, blocking viral rebound. We generated chemical derivatives of dCA that rationalized molecular docking of dCA to an active and specific Tat conformer. These revealed the importance of the cycloheptene ring and the isoquinoline nitrogen's positioning in the interaction with specific residues of Tat's basic domain. These features are distinct from the ones required for inhibition of cyclin-dependent kinase 8 (CDK8), the only other known ligand of dCA. Besides, we demonstrated that dCA activity on HIV-1 transcription is independent of CDK8. The binding of dCA to Tat with nanomolar affinity alters the local protein environment, rendering Tat more resistant to proteolytic digestion. dCA thus locks a transient conformer of Tat, specifically blocking functions dependent of its basic domain, namely the Tat-TAR interaction; while proteins with similar basic patches are unaffected by dCA. Our results improve our knowledge of the mode of action of dCA and support structure-based design strategies targeting Tat, to help advance development of dCA, as well as novel Tat inhibitors.IMPORTANCE Tat activates virus production, and limited Tat transactivation correlates with HIV-1 latency. The Tat inhibitor dCA locks HIV in persistent latency. This drug class enables block-and-lock functional cure approaches, aimed at reducing residual viremia during therapy and limiting viral rebound. dCA may also have additional therapeutic benefits since Tat is also neurotoxic. Unfortunately, Tat inhibitors are not clinically available. We generated chemical derivatives and rationalized binding to an active and specific Tat conformer. dCA features required for Tat inhibition are distinct from features needed for inhibition of cyclin-dependent kinase 8 (CDK8), the only other known target of dCA. Furthermore, knockdown of CDK8 did not impact dCA's activity on HIV-1 transcription. Binding of dCA to Tat's basic domain altered the local protein environment and rendered Tat more resistant to proteolytic digestion. dCA locks a transient conformer of Tat, blocking functions dependent on its basic domain, namely its ability to amplify viral transcription. Our results define dCA's mode of action, support structure-based-design strategies targeting Tat, and provide valuable information for drug development around the dCA pharmacophore.
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Xi M, Chen T, Wu C, Gao X, Wu Y, Luo X, Du K, Yu L, Cai T, Shen R, Sun H. CDK8 as a therapeutic target for cancers and recent developments in discovery of CDK8 inhibitors. Eur J Med Chem 2018; 164:77-91. [PMID: 30594029 DOI: 10.1016/j.ejmech.2018.11.076] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Revised: 11/08/2018] [Accepted: 11/09/2018] [Indexed: 02/08/2023]
Abstract
Cyclin-dependent kinases 8 (CDK8) regulates transcriptional process via associating with the mediator complex or phosphorylating transcription factors (TF). Overexpression of CDK8 has been observed in various cancers. It mediates aberrant activation of Wnt/β-catenin signaling pathway, which is initially recognized and best studied in colorectal cancer (CRC). CDK8 acts as an oncogene and represents a potential target for developing novel CDK8 inhibitors in cancer therapeutics. However, other study has revealed its contrary role. The function of CDK8 is context dependent. Even so, a variety of potent and selective CDK8 inhibitors have been discovered after crystal structures were resolved in two states (active or inactive). In this review, we summarize co-crystal structures, biological mechanisms, dysregulation in cancers and recent progress in the field of CDK8 inhibitors, trying to offer an outlook of CDK8 inhibitors in cancer therapy in future.
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Affiliation(s)
- Meiyang Xi
- College of Chemistry and Chemical Engineering, Shaoxing University, Shaoxing, 312000, China
| | - Tingkai Chen
- Department of Medicinal Chemistry, China Pharmaceutical University, Nanjing, 210009, China
| | - Chunlei Wu
- College of Chemistry and Chemical Engineering, Shaoxing University, Shaoxing, 312000, China
| | - Xiaozhong Gao
- College of Chemistry and Chemical Engineering, Shaoxing University, Shaoxing, 312000, China
| | - Yonghua Wu
- College of Chemistry and Chemical Engineering, Shaoxing University, Shaoxing, 312000, China
| | - Xiang Luo
- College of Chemistry and Chemical Engineering, Shaoxing University, Shaoxing, 312000, China
| | - Kui Du
- College of Chemistry and Chemical Engineering, Shaoxing University, Shaoxing, 312000, China
| | - Lemao Yu
- College of Chemistry and Chemical Engineering, Shaoxing University, Shaoxing, 312000, China
| | - Tao Cai
- College of Chemistry and Chemical Engineering, Shaoxing University, Shaoxing, 312000, China
| | - Runpu Shen
- College of Chemistry and Chemical Engineering, Shaoxing University, Shaoxing, 312000, China
| | - Haopeng Sun
- Department of Medicinal Chemistry, China Pharmaceutical University, Nanjing, 210009, China.
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Bao W, Tao Y, Cheng J, Huang J, Cao J, Zhang M, Ye W, Wang B, Li Y, Zhu L, Lee CS. In(OTf) 3-Catalyzed Cascade Cyclization for Construction of Oxatricyclic Compounds. Org Lett 2018; 20:7912-7915. [PMID: 30543298 DOI: 10.1021/acs.orglett.8b03461] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A highly diastereoselective cascade cyclization reaction has been developed for establishing a series of oxatricyclic compounds using Chan's diene and simple keto alkynal substrates with only 1 mol % of In(OTf)3 as the catalyst in 82-92% yields. The potential utility of this synthetic strategy has been demonstrated in model studies for the construction the core structures of 1α,8α:4α,5α-diepoxy-4,5-dihydroosmitopsin and cortistatin A.
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Affiliation(s)
- Wenli Bao
- Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology , Peking University Shenzhen Graduate School , Shenzhen University Town, Xili, Shenzhen 518055 , China
| | - Yezi Tao
- Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology , Peking University Shenzhen Graduate School , Shenzhen University Town, Xili, Shenzhen 518055 , China
| | - Jiangqun Cheng
- Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology , Peking University Shenzhen Graduate School , Shenzhen University Town, Xili, Shenzhen 518055 , China
| | - Junrong Huang
- Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology , Peking University Shenzhen Graduate School , Shenzhen University Town, Xili, Shenzhen 518055 , China
| | - Jingming Cao
- Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology , Peking University Shenzhen Graduate School , Shenzhen University Town, Xili, Shenzhen 518055 , China
| | - Mengxun Zhang
- Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology , Peking University Shenzhen Graduate School , Shenzhen University Town, Xili, Shenzhen 518055 , China
| | - Weijian Ye
- Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology , Peking University Shenzhen Graduate School , Shenzhen University Town, Xili, Shenzhen 518055 , China
| | - Bo Wang
- Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology , Peking University Shenzhen Graduate School , Shenzhen University Town, Xili, Shenzhen 518055 , China
| | - Yang Li
- Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology , Peking University Shenzhen Graduate School , Shenzhen University Town, Xili, Shenzhen 518055 , China
| | - Lizhi Zhu
- Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology , Peking University Shenzhen Graduate School , Shenzhen University Town, Xili, Shenzhen 518055 , China.,Institute of Translational Medicine, Shenzhen Second People's Hospital , The First Affiliated Hospital of Shenzhen University, Health Science Center , Shenzhen 518035 , China
| | - Chi-Sing Lee
- Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology , Peking University Shenzhen Graduate School , Shenzhen University Town, Xili, Shenzhen 518055 , China.,Institute of Research and Continuing Edition (Shenzhen) , Hong Kong Baptist University , Industrialization Complex Building, Shenzhen Virtual University Park, Shenzhen 518000 , China.,Department of Chemistry , Hong Kong Baptist University , Kowloon Tong , Hong Kong SAR
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7
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Liu L, Cheng HL, Ma WQ, Hou SH, Tu YQ, Zhang FM, Zhang XM, Wang SH. Improved synthesis of 8-oxabicyclo[3.2.1]octanes via tandem C-H oxidation/oxa-[3,3] Cope rearrangement/aldol cyclization. Chem Commun (Camb) 2018; 54:196-199. [PMID: 29226934 DOI: 10.1039/c7cc08511g] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A tandem C-H oxidation/oxa-[3,3] Cope rearrangement/aldol reaction of allylic silylethers promoted by T+BF4-(tempo oxoammonium tetrafluoroborate)/ZnBr2 has been successfully developed allowing the efficient construction of 8-oxabicyclo[3.2.1]octanes and their analogs with a wide substrate scope.
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Affiliation(s)
- Lin Liu
- State Key Laboratory of Applied Organic Chemistry & School of Pharmacy, Lanzhou University, Lanzhou 730000, P. R. China.
| | - Hai-Long Cheng
- State Key Laboratory of Applied Organic Chemistry & School of Pharmacy, Lanzhou University, Lanzhou 730000, P. R. China.
| | - Wen-Qiang Ma
- State Key Laboratory of Applied Organic Chemistry & School of Pharmacy, Lanzhou University, Lanzhou 730000, P. R. China.
| | - Si-Hua Hou
- State Key Laboratory of Applied Organic Chemistry & School of Pharmacy, Lanzhou University, Lanzhou 730000, P. R. China.
| | - Yong-Qiang Tu
- State Key Laboratory of Applied Organic Chemistry & School of Pharmacy, Lanzhou University, Lanzhou 730000, P. R. China. and School of Chemistry & Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China.
| | - Fu-Min Zhang
- State Key Laboratory of Applied Organic Chemistry & School of Pharmacy, Lanzhou University, Lanzhou 730000, P. R. China.
| | - Xiao-Ming Zhang
- State Key Laboratory of Applied Organic Chemistry & School of Pharmacy, Lanzhou University, Lanzhou 730000, P. R. China.
| | - Shao-Hua Wang
- State Key Laboratory of Applied Organic Chemistry & School of Pharmacy, Lanzhou University, Lanzhou 730000, P. R. China.
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Zweig JE, Kim DE, Newhouse TR. Methods Utilizing First-Row Transition Metals in Natural Product Total Synthesis. Chem Rev 2017; 117:11680-11752. [PMID: 28525261 DOI: 10.1021/acs.chemrev.6b00833] [Citation(s) in RCA: 138] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
First-row transition-metal-mediated reactions constitute an important and growing area of research due to the low cost, low toxicity, and exceptional synthetic versatility of these metals. Currently, there is considerable effort to replace existing precious-metal-catalyzed reactions with first-row analogs. More importantly, there are a plethora of unique transformations mediated by first-row metals, which have no classical second- or third-row counterpart. Herein, the application of first-row metal-mediated methods to the total synthesis of natural products is discussed. This Review is intended to highlight strategic uses of these metals to realize efficient syntheses and highlight the future potential of these reagents and catalysts in organic synthesis.
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Affiliation(s)
- Joshua E Zweig
- Department of Chemistry, Yale University , 275 Prospect Street, New Haven, Connecticut 06520-8107, United States
| | - Daria E Kim
- Department of Chemistry, Yale University , 275 Prospect Street, New Haven, Connecticut 06520-8107, United States
| | - Timothy R Newhouse
- Department of Chemistry, Yale University , 275 Prospect Street, New Haven, Connecticut 06520-8107, United States
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Aquino C, Greszler SN, Micalizio GC. Synthesis of the Cortistatin Pentacyclic Core by Alkoxide-Directed Metallacycle-Mediated Annulative Cross-Coupling. Org Lett 2016; 18:2624-7. [PMID: 27193994 PMCID: PMC4892975 DOI: 10.1021/acs.orglett.6b01048] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The pentacyclic core skeleton of the cortistatins has been prepared in a stereoselective fashion by strategic use of an alkoxide-directed metallacycle-mediated annulative cross-coupling. This metal-centered tandem reaction delivers a polyunsaturated hydrindane and establishes the C13 stereodefined quaternary center with high levels of stereocontrol. Subsequent regio- and stereoselective global hydroboration results in the realization of the DE-trans ring fusion and a tertiary alcohol at C8. Establishment of the ABC-tricyclic subunit was then accomplished through phenolic oxidation/trans-acetalization, chemoselective reduction, regioselective cleavage, and intramolecular alkylation at C5.
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Affiliation(s)
- Claudio Aquino
- Department of Chemistry, Dartmouth College, Burke Laboratory, Hanover, NH 03755
- Department of Chemistry, The Scripps Research Institute, Jupiter, FL 33458
| | | | - Glenn C. Micalizio
- Department of Chemistry, Dartmouth College, Burke Laboratory, Hanover, NH 03755
- Department of Chemistry, The Scripps Research Institute, Jupiter, FL 33458
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Kuang L, Liu LL, Chiu P. Formal Total Synthesis of (+)-Cortistatins A and J. Chemistry 2015; 21:14287-91. [DOI: 10.1002/chem.201502890] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Indexed: 11/12/2022]
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Bai WJ, David JG, Feng ZG, Weaver MG, Wu KL, Pettus TRR. The domestication of ortho-quinone methides. Acc Chem Res 2014; 47:3655-64. [PMID: 25469551 PMCID: PMC4270411 DOI: 10.1021/ar500330x] [Citation(s) in RCA: 309] [Impact Index Per Article: 30.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
![]()
An ortho-quinone methide (o-QM)
is a highly reactive chemical motif harnessed by nature for a variety
of purposes. Given its extraordinary reactivity and biological importance,
it is surprising how few applications within organic synthesis exist.
We speculate that their widespread use has been slowed by the complications
that surround the preparation of their precursors, the harsh generation
methods, and the omission of this stratagem from computer databases
due to its ephemeral nature. About a decade ago, we discovered
a mild anionic triggering procedure
to generate transitory o-QMs at low temperature from
readily available salicylaldehydes, particularly OBoc derivatives.
This novel reaction cascade included both the o-QM
formation and the subsequent consumption reaction. The overall transformation
was initiated by the addition of the organometallic reagent, usually
a Grignard reagent, which resulted in the formation of a benzyloxy
alkoxide. Boc migration from the neighboring phenol produced a magnesium
phenoxide that we supposed underwent β-elimination of the transferred
Boc residue to form an o-QM for immediate further
reactions. Moreover, the cascade proved controllable through careful
manipulation of metallic and temperature levers so that it could be
paused, stopped, or restarted at various intermediates and stages.
This new level of domestication enabled us to deploy o-QMs for the first time in a range of applications including diastereocontrolled
reactions. This sequence ultimately could be performed in either
multipot
or single pot processes. The subsequent reaction of the fleeting o-QM intermediates included the 1,4-conjugate additions
that led to unbranched or branched ortho-alkyl substituted
phenols and Diels–Alder reactions that provided 4-unsubstituted
or 4-substituted benzopyrans and chroman ketals. The latter cycloadducts
were obtained for the first time with outstanding diastereocontrol.
In addition, the steric effects of the newly created stereocenters
in subsequent reactions of chroman ketals and acetals were studied
and proved predictable. Through the use of a chiral auxiliary, Diels–Alder
products were deployed in numerous enantioselective reactions including
several complex natural products syntheses. In this Account, we summarize
our efforts, which we hope have contributed to the synthetic renaissance
for this venerable species.
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Affiliation(s)
- Wen-Ju Bai
- Department of Chemistry and
Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Jonathan G. David
- Department of Chemistry and
Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Zhen-Gao Feng
- Department of Chemistry and
Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Marisa G. Weaver
- Department of Chemistry and
Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Kun-Liang Wu
- Department of Chemistry and
Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Thomas R. R. Pettus
- Department of Chemistry and
Biochemistry, University of California, Santa Barbara, California 93106, United States
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Salvador JAR, Carvalho JFS, Neves MAC, Silvestre SM, Leitão AJ, Silva MMC, Sá e Melo ML. Anticancer steroids: linking natural and semi-synthetic compounds. Nat Prod Rep 2013; 30:324-74. [PMID: 23151898 DOI: 10.1039/c2np20082a] [Citation(s) in RCA: 197] [Impact Index Per Article: 17.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Steroids, a widespread class of natural organic compounds occurring in animals, plants and fungi, have shown great therapeutic value for a broad array of pathologies. The present overview is focused on the anticancer activity of steroids, which is very representative of a rich structural molecular diversity and ability to interact with various biological targets and pathways. This review encompasses the most relevant discoveries on steroid anticancer drugs and leads through the last decade and comprises 668 references.
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Affiliation(s)
- Jorge A R Salvador
- Laboratory of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Coimbra, Polo das Ciências da Saúde, 3000-508, Coimbra, Portugal.
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Defaut B, Parsons TB, Spencer N, Male L, Kariuki BM, Grainger RS. Synthesis of the trans-hydrindane core of dictyoxetane. Org Biomol Chem 2012; 10:4926-32. [DOI: 10.1039/c2ob25384d] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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