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Miyakita D, Kawanishi K, Katsuyama A, Yamamoto K, Yakushiji F, Ichikawa S. Solid-Phase Synthesis of Nannocystin Ax and Its Analogues. J Org Chem 2023. [PMID: 37466434 DOI: 10.1021/acs.joc.3c01189] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/20/2023]
Abstract
Solid-phase total synthesis of nannocystin Ax (1) was disclosed. A coupling reaction between a peptide and a polyketide moiety was conducted on a solid support, and macrocyclization was achieved by Mitsunobu cyclization. The established synthetic route was efficient to prepare its analogues, which contain different types of peptide moieties.
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Affiliation(s)
- Daiki Miyakita
- Faculty of Pharmaceutical Sciences, Hokkaido University, Kita-12, Nishi-6, Kita-ku, Sapporo 060-0812, Japan
| | - Kohei Kawanishi
- Faculty of Pharmaceutical Sciences, Hokkaido University, Kita-12, Nishi-6, Kita-ku, Sapporo 060-0812, Japan
| | - Akira Katsuyama
- Faculty of Pharmaceutical Sciences, Hokkaido University, Kita-12, Nishi-6, Kita-ku, Sapporo 060-0812, Japan
- Center for Research and Education on Drug Discovery, Hokkaido University, Kita-12, Nishi-6, Kita-ku, Sapporo 060-0812, Japan
- Global Station for Biosurfaces and Drug Discovery, Global Institution for Collaborative Research and Education (GI-CoRE), Hokkaido University, Kita-12, Nishi-6, Kita-ku, Sapporo 060-0812, Japan
| | - Kazuki Yamamoto
- Faculty of Pharmaceutical Sciences, Hokkaido University, Kita-12, Nishi-6, Kita-ku, Sapporo 060-0812, Japan
- Center for Research and Education on Drug Discovery, Hokkaido University, Kita-12, Nishi-6, Kita-ku, Sapporo 060-0812, Japan
| | - Fumika Yakushiji
- Faculty of Pharmaceutical Sciences, Hokkaido University, Kita-12, Nishi-6, Kita-ku, Sapporo 060-0812, Japan
- Center for Research and Education on Drug Discovery, Hokkaido University, Kita-12, Nishi-6, Kita-ku, Sapporo 060-0812, Japan
- Global Station for Biosurfaces and Drug Discovery, Global Institution for Collaborative Research and Education (GI-CoRE), Hokkaido University, Kita-12, Nishi-6, Kita-ku, Sapporo 060-0812, Japan
| | - Satoshi Ichikawa
- Faculty of Pharmaceutical Sciences, Hokkaido University, Kita-12, Nishi-6, Kita-ku, Sapporo 060-0812, Japan
- Center for Research and Education on Drug Discovery, Hokkaido University, Kita-12, Nishi-6, Kita-ku, Sapporo 060-0812, Japan
- Global Station for Biosurfaces and Drug Discovery, Global Institution for Collaborative Research and Education (GI-CoRE), Hokkaido University, Kita-12, Nishi-6, Kita-ku, Sapporo 060-0812, Japan
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2
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Nomula R, Pratapure MS, Kontham R. Studies Directed Toward the Total Synthesis of Nannocystin A. ChemistrySelect 2022. [DOI: 10.1002/slct.202203893] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Rajesh Nomula
- Organic Chemistry Division CSIR-National Chemical Laboratory Dr. Homi Bhabha Road Pune 411008 India
| | - Madhukar S. Pratapure
- Organic Chemistry Division CSIR-National Chemical Laboratory Dr. Homi Bhabha Road Pune 411008 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| | - Ravindar Kontham
- Organic Chemistry Division CSIR-National Chemical Laboratory Dr. Homi Bhabha Road Pune 411008 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
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Pais JP, Policarpo M, Pires D, Francisco AP, Madureira AM, Testa B, Anes E, Constantino L. Fluoroquinolone Derivatives in the Treatment of Mycobacterium tuberculosis Infection. Pharmaceuticals (Basel) 2022; 15:ph15101213. [PMID: 36297325 PMCID: PMC9609866 DOI: 10.3390/ph15101213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 09/23/2022] [Accepted: 09/26/2022] [Indexed: 12/01/2022] Open
Abstract
Tuberculosis (TB) is currently one of the leading causes of death due to infective agents, and the growing rate of multidrug-resistant tuberculosis (MDR TB) cases poses an emergent public health threat. Fluoroquinolones are commonly used in the treatment of both MDR TB and drug-sensitive tuberculosis patients who are intolerant to first-line antitubercular agents. Unfortunately, these drugs have mild side effects, relevant to the prolonged treatment regimens and diminished bioavailability due to binding of metal ions. Moreover, the resistance to fluoroquinolones is also on the rise, a characteristic of extensively drug-resistant TB (XDR TB). Here, we developed esters as prodrugs of the fluoroquinolones levofloxacin and ciprofloxacin, with long-chain fatty alcohols. Both the alcohols and the quinolone have previously shown antimycobacterial activity and the aim was to develop esters with improved lipophilicity and capable of delivering the free acid inside mycobacterial cells. The carboxylic acid group of fluoroquinolones is essential to the mode of action but is also responsible for many of its side effects and metal-chelating properties. The synthesis, stability in biological media, and antibacterial activity were evaluated, the latter not only against Mycobacterium tuberculosis but also against other clinically relevant bacterial species, since the parent compounds display a broad spectrum of activity. The biological results show a reduction in the antitubercular activity of the synthesized derivatives, probably due to deficient activation of the ester prodrug. Despite this, it was found that the derivatives exhibit bioactivity against other fluoroquinolone-resistant bacteria, indicating a different mode of action and suggesting that it may be worthwhile to research further modifications to the carboxylic acid group. This might lead to new compounds that are efficient against resistant strains. This idea that the compounds may act by a different mechanism of action was further supported by a brief computer investigation that demonstrated the potential lack of selectivity of the esters to the fluoroquinolone target.
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Affiliation(s)
- João Pedro Pais
- Research Institute for Medicines and Pharmaceutical Sciences (iMed.UL), Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal
| | - Margarida Policarpo
- Research Institute for Medicines and Pharmaceutical Sciences (iMed.UL), Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal
| | - David Pires
- Research Institute for Medicines and Pharmaceutical Sciences (iMed.UL), Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal
| | - Ana Paula Francisco
- Research Institute for Medicines and Pharmaceutical Sciences (iMed.UL), Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal
- Faculty of Pharmacy, University of Lisbon, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal
| | - Ana Margarida Madureira
- Research Institute for Medicines and Pharmaceutical Sciences (iMed.UL), Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal
- Faculty of Pharmacy, University of Lisbon, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal
| | | | - Elsa Anes
- Research Institute for Medicines and Pharmaceutical Sciences (iMed.UL), Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal
- Faculty of Pharmacy, University of Lisbon, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal
| | - Luís Constantino
- Research Institute for Medicines and Pharmaceutical Sciences (iMed.UL), Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal
- Faculty of Pharmacy, University of Lisbon, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal
- Correspondence: ; Tel.: +35-19-6548-8519
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Hou Y, Liu R, Xia M, Sun C, Zhong B, Yu J, Ai N, Lu JJ, Ge W, Liu B, Chen X. Nannocystin ax, an eEF1A inhibitor, induces G1 cell cycle arrest and caspase-independent apoptosis through cyclin D1 downregulation in colon cancer in vivo. Pharmacol Res 2021; 173:105870. [PMID: 34500061 DOI: 10.1016/j.phrs.2021.105870] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 08/24/2021] [Accepted: 09/02/2021] [Indexed: 12/28/2022]
Abstract
Colorectal cancer (CRC) is one of the most common causes of cancer-related death worldwide. Nannocystin ax (NAN), a 21-membered cyclodepsipeptide initially isolated from myxobacteria of the Nannocystis genus, was found to target the eukaryotic elongation factor 1A (eEF1A). The current study was designed to evaluate the anticancer effect and underlying mechanisms of NAN with in vitro and in vivo models. Results showed that NAN induced G1 phase cell cycle arrest and caspase-independent apoptosis in HCT116 and HT29 human CRC cells. NAN significantly downregulated cyclin D1 level in a short time, but NAN did not affect the transcription level and ubiquitin-dependent degradation of cyclin D1. Furthermore, NAN treatment directly targeted eEF1A and partially decreased the synthesis of new proteins, contributing to the downregulation of cyclin D1. Besides, NAN significantly suppressed tumor growth in the zebrafish xenograft model. In conclusion, NAN triggered G1 phase cell cycle arrest through cyclin D1 downregulation and eEF1A-targeted translation inhibition and promoted caspase-independent apoptosis in CRC cells.
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Affiliation(s)
- Ying Hou
- Institute of Chinese Medical Sciences, University of Macau, Taipa, Macau, China; Department of Pharmaceutical Sciences, Faculty of Health Sciences, University of Macau, Taipa, Macau, China
| | - Rong Liu
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Mengwei Xia
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Chong Sun
- Institute of Chinese Medical Sciences, University of Macau, Taipa, Macau, China; Department of Pharmaceutical Sciences, Faculty of Health Sciences, University of Macau, Taipa, Macau, China
| | - Bingling Zhong
- Institute of Chinese Medical Sciences, University of Macau, Taipa, Macau, China; Department of Pharmaceutical Sciences, Faculty of Health Sciences, University of Macau, Taipa, Macau, China
| | - Jie Yu
- Institute of Chinese Medical Sciences, University of Macau, Taipa, Macau, China; Department of Pharmaceutical Sciences, Faculty of Health Sciences, University of Macau, Taipa, Macau, China
| | - Nana Ai
- Centre of Reproduction, Development and Aging (CRDA), Faculty of Health Sciences, University of Macau, Taipa, Macau, China
| | - Jin-Jian Lu
- Institute of Chinese Medical Sciences, University of Macau, Taipa, Macau, China; Department of Pharmaceutical Sciences, Faculty of Health Sciences, University of Macau, Taipa, Macau, China
| | - Wei Ge
- Centre of Reproduction, Development and Aging (CRDA), Faculty of Health Sciences, University of Macau, Taipa, Macau, China
| | - Bo Liu
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China.
| | - Xiuping Chen
- Institute of Chinese Medical Sciences, University of Macau, Taipa, Macau, China; Department of Pharmaceutical Sciences, Faculty of Health Sciences, University of Macau, Taipa, Macau, China.
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Sun C, Liu R, Xia M, Hou Y, Wang X, Lu JJ, Liu B, Chen X. Nannocystin Ax, a natural elongation factor 1α inhibitor from Nannocystis sp., suppresses epithelial-mesenchymal transition, adhesion and migration in lung cancer cells. Toxicol Appl Pharmacol 2021; 420:115535. [PMID: 33848516 DOI: 10.1016/j.taap.2021.115535] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 04/07/2021] [Accepted: 04/09/2021] [Indexed: 11/17/2022]
Abstract
Epithelial-mesenchymal transition (EMT), the epithelial cells transdifferentiation into the mesenchymal cells, has been involved in cancer metastasis. Nannocystin ax (NAN) is a cyclodepsipeptide initially isolated from Myxobacterial genus, Nannocystis sp. with anticancer activities. This study was designed to explore the effect of NAN on TGF-β1-induced EMT in lung cancer cells. The morphological alteration was observed with a microscope. Western blotting and immunofluorescence assays were used to detect the protein expression and the localization. The adhesion and migration were evaluated by adhesion assay and wound healing assay. The mRNA expression of TGF-β receptor type I (TβRI) was determined by real-time PCR. NAN significantly restrained TGF-β1-induced EMT morphological changes, the protein expression of E-cadherin, N-cadherin, and Vimentin, etc. TGF-β1 activated phosphorylation and nuclear translocation of Smad2/3 were inhibited by NAN. Furthermore, NAN suppressed adhesion and migration triggered by TGF-β1. In addition, NAN significantly down-regulated TβRI on the transcriptional level directly. In summary, these results showed that NAN restrained TGF-β1-induced epithelial-mesenchymal transition, migration, and adhesion in human lung cancer cells. The underlying mechanism involved the inhibition of Smad2/3 and the TβRI signaling pathway. This study reveals the new anticancer effect and mechanism of NAN.
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Affiliation(s)
- Chong Sun
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, China
| | - Rong Liu
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu, China
| | - Mengwei Xia
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu, China
| | - Ying Hou
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, China
| | - Xumei Wang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, China
| | - Jin-Jian Lu
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, China
| | - Bo Liu
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu, China.
| | - Xiuping Chen
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, China.
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Optimization of Two Steps in Scale-Up Synthesis of Nannocystin A. Mar Drugs 2021; 19:md19040198. [PMID: 33807472 PMCID: PMC8066987 DOI: 10.3390/md19040198] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Revised: 03/23/2021] [Accepted: 03/29/2021] [Indexed: 01/03/2023] Open
Abstract
We have accomplished a 10-step (longest linear) total synthesis of nannocystin A on a four hundred milligram scale. The previously reported Kobayashi vinylogous Mukaiyama aldol reaction to connect C4 and C5 was unreproducible during the scaling up process. A more convenient and cost-efficient Keck asymmetric vinylogous aldol reaction was employed to improve this transformation.
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From Target-Oriented to Motif-Oriented: A Case Study on Nannocystin Total Synthesis. Molecules 2020; 25:molecules25225327. [PMID: 33203102 PMCID: PMC7697126 DOI: 10.3390/molecules25225327] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 11/09/2020] [Accepted: 11/11/2020] [Indexed: 01/14/2023] Open
Abstract
Natural product total synthesis is in essence target-oriented in that a set of organic transformations are orchestrated into a workable process, leading ultimately to the target molecule with a predefined architecture. For a bioactive lead, proof of synthetic viability is merely the beginning. Ensuing effort repurposes the initial synthesis for structural diversification in order to probe structure-activity relationship (SAR). Yet accessibility is not equal to flexibility; moving from convergency to divergency, it is not always feasible to explore the chemical space around a particular substructure of interest simply by tweaking an established route. In this situation, the motif-oriented strategy becomes a superior choice, which gives priority to synthetic flexibility at the concerned site such that a route is adopted only if it is capable of implementing diversification therein. This strategy was recently devised by Fürstner et al., enabling them to achieve total synthesis of both natural and non-natural nannocystins varied at an otherwise challenging position. The present review examines seven distinctive nannocystin total syntheses reported thus far and showcases the merits of conventional (target-oriented) as well as motif-oriented strategies, concluding that these two approaches complement each other and are both indispensable for natural product based drug discovery.
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