1
|
Liu Y, Zhao J, Hong R. Toward the Briarane Core via 1,3-Dipolar Cycloaddition. Org Lett 2024. [PMID: 38804559 DOI: 10.1021/acs.orglett.4c01411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2024]
Abstract
The complete C20 framework of brianthein W was established, featuring hydroboration/allylation, to provide the C1-C2 quaternary/tertiary stereoarray with excellent stereocontrol. Intramolecular nitrile oxide cycloaddition (INOC) was adopted as the key transformation to establish the trans-fused 6/10-bicyclic ring system. Evolution of the second INOC event revealed the intricacies governing regioselectivity, which ultimately led to construction of the highly strained 10-membered carbocycle.
Collapse
Affiliation(s)
- Yichen Liu
- State Key Laboratory of Chemical Biology, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, P.R. China
- University of Chinese Academy of Sciences, Beijing 101408, P.R. China
| | - Jiangang Zhao
- State Key Laboratory of Chemical Biology, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, P.R. China
- University of Chinese Academy of Sciences, Beijing 101408, P.R. China
| | - Ran Hong
- State Key Laboratory of Chemical Biology, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, P.R. China
- University of Chinese Academy of Sciences, Beijing 101408, P.R. China
| |
Collapse
|
2
|
Hsiao WC, Niu GH, Lo CF, Wang JY, Chi YH, Huang WC, Tung CW, Sung PJ, Tsou LK, Zhang MM. Marine diterpenoid targets STING palmitoylation in mammalian cells. Commun Chem 2023; 6:153. [PMID: 37463995 DOI: 10.1038/s42004-023-00956-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Accepted: 07/10/2023] [Indexed: 07/20/2023] Open
Abstract
Natural products are important sources of therapeutic agents and useful drug discovery tools. The fused macrocycles and multiple stereocenters of briarane-type diterpenoids pose a major challenge to total synthesis and efforts to characterize their biological activities. Harnessing a scalable source of excavatolide B (excB) from cultured soft coral Briareum stechei, we generated analogs by late-stage diversification and performed structure-activity analysis, which was critical for the development of functional excB probes. We further used these probes in a chemoproteomic strategy to identify Stimulator of Interferon Genes (STING) as a direct target of excB in mammalian cells. We showed that the epoxylactone warhead of excB is required to covalently engage STING at its membrane-proximal Cys91, inhibiting STING palmitoylation and signaling. This study reveals a possible mechanism-of-action of excB, and expands the repertoire of covalent STING inhibitors.
Collapse
Affiliation(s)
- Wan-Chi Hsiao
- Institute of Molecular and Genomic Medicine, National Health Research Institutes, Miaoli, 35053, Taiwan
- Institute of Biotechnology, National Tsing Hua University, Hsinchu, 30013, Taiwan
| | - Guang-Hao Niu
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Miaoli, 35053, Taiwan
| | - Chen-Fu Lo
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Miaoli, 35053, Taiwan
| | - Jing-Ya Wang
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Miaoli, 35053, Taiwan
| | - Ya-Hui Chi
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Miaoli, 35053, Taiwan
| | - Wei-Cheng Huang
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Miaoli, 35053, Taiwan
| | - Chun-Wei Tung
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Miaoli, 35053, Taiwan
| | - Ping-Jyun Sung
- Department of Marine Biotechnology and Resources, National Sun Yat-sen University, Kaohsiung, 804201, Taiwan.
- National Museum of Marine Biology and Aquarium, Pingtung, 944401, Taiwan.
- Chinese Medicine Research and Development Center, China Medical University Hospital, Taichung, 404394, Taiwan.
- Graduate Institute of Natural Products, Kaohsiung Medical University, Kaohsiung, 807378, Taiwan.
| | - Lun Kelvin Tsou
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Miaoli, 35053, Taiwan.
| | - Mingzi M Zhang
- Institute of Molecular and Genomic Medicine, National Health Research Institutes, Miaoli, 35053, Taiwan.
| |
Collapse
|
3
|
Huynh TH, Lee GH, Fang LS, Sheu JH, Sung PJ. Briarenols F–H: New polyoxygenated briarane diterpenoids produced by the octocoral Briareum excavatum. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.151826] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
4
|
Sung PJ, Hwang TL, Wu YC, Chen YH, Chin HK, Peng BR, Chen YY, Hu CC, Zheng LG, Huynh TH, Su TP, Zhang YL, Wen ZH. Survey of Briarane-Type Diterpenoids – Part VII. HETEROCYCLES 2020. [DOI: 10.3987/rev-19-925] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
|
5
|
Molina SL, Forero AM, Ayala FI, Puyana M, Zea S, Castellanos L, Muñoz D, Arboleda G, Sandoval-Hernández AG, Ramos FA. Metabolic Profiling of the Soft Coral Erythropodium caribaeorum (Alcyonacea: Anthothelidae) from the Colombian Caribbean Reveals Different Chemotypes. Mar Drugs 2019; 18:E4. [PMID: 31861453 PMCID: PMC7024379 DOI: 10.3390/md18010004] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2019] [Revised: 10/11/2019] [Accepted: 10/12/2019] [Indexed: 12/23/2022] Open
Abstract
The Caribbean soft coral Erythropodium caribaeorum is a rich source of erythrolides-chlorinated briarane diterpenoids. These compounds have an ecological role as feeding deterrents, with a wide variation in their composition depending on the location where the sample is collected. In Colombia, this soft coral can be found at different locations in the Caribbean Sea including Santa Marta, Islas del Rosario, and Providencia-three environmentally different coral reef areas in the south and southwest Caribbean Sea. In order to evaluate differences in erythrolide composition, the metabolic profiles of samples from each of these locations were analyzed by HPLC-MS. Principal component analysis showed changes in the diterpene composition according to the sample origin. Diterpenes from samples collected at each location were isolated to describe the three chemotypes. The chemotype from Santa Marta was highly diverse, with the new erythrolides W and X together with eight known erythrolides. The sample from Islas del Rosario showed a low diversity chemotype constituted by high amounts of erythrolide A and B. The chemotype from Providencia showed low chemical diversity with only two main compounds-erythrolide V and R. Evaluation of cytotoxic activity against the human cancer cell lines PC-3, MCF7, and A549 showed erythrolides A and B as the more active compounds with IC50 values in the range from 2.45 to 30 μM.
Collapse
Affiliation(s)
- Sandra L. Molina
- Departamento de Química, Facultad de Ciencias, Universidad Nacional de Colombia Sede Bogotá, Av Cra 30 45-03, 111112 Bogotá, Colombia; (S.L.M.); (A.M.F.); (F.I.A.); (L.C.); (D.M.); (A.G.S.-H.)
| | - Abel M. Forero
- Departamento de Química, Facultad de Ciencias, Universidad Nacional de Colombia Sede Bogotá, Av Cra 30 45-03, 111112 Bogotá, Colombia; (S.L.M.); (A.M.F.); (F.I.A.); (L.C.); (D.M.); (A.G.S.-H.)
| | - Farja I. Ayala
- Departamento de Química, Facultad de Ciencias, Universidad Nacional de Colombia Sede Bogotá, Av Cra 30 45-03, 111112 Bogotá, Colombia; (S.L.M.); (A.M.F.); (F.I.A.); (L.C.); (D.M.); (A.G.S.-H.)
| | - Mónica Puyana
- Departamento de Ciencias Biológicas y Ambientales, Facultad de Ciencias Naturales e Ingeniería, Universidad Jorge Tadeo Lozano Sede Bogotá, Cra 4 22-6,1, 110010 Bogotá, Colombia;
| | - Sven Zea
- Instituto de Estudios en Ciencias del Mar-CECIMAR, Universidad Nacional de Colombia Sede Caribe, 470006 Santa Marta, Colombia;
| | - Leonardo Castellanos
- Departamento de Química, Facultad de Ciencias, Universidad Nacional de Colombia Sede Bogotá, Av Cra 30 45-03, 111112 Bogotá, Colombia; (S.L.M.); (A.M.F.); (F.I.A.); (L.C.); (D.M.); (A.G.S.-H.)
| | - Diego Muñoz
- Departamento de Química, Facultad de Ciencias, Universidad Nacional de Colombia Sede Bogotá, Av Cra 30 45-03, 111112 Bogotá, Colombia; (S.L.M.); (A.M.F.); (F.I.A.); (L.C.); (D.M.); (A.G.S.-H.)
- Facultad de Ciencias, Universidad de Ciencias Aplicadas y Ambientales, 111166 Bogotá, Colombia
| | - Gonzalo Arboleda
- Instituto de Genética Humana, Universidad Nacional de Colombia Sede Bogotá, 111112 Bogotá, Colombia;
| | - Adrián G. Sandoval-Hernández
- Departamento de Química, Facultad de Ciencias, Universidad Nacional de Colombia Sede Bogotá, Av Cra 30 45-03, 111112 Bogotá, Colombia; (S.L.M.); (A.M.F.); (F.I.A.); (L.C.); (D.M.); (A.G.S.-H.)
- Instituto de Genética Humana, Universidad Nacional de Colombia Sede Bogotá, 111112 Bogotá, Colombia;
| | - Freddy A. Ramos
- Departamento de Química, Facultad de Ciencias, Universidad Nacional de Colombia Sede Bogotá, Av Cra 30 45-03, 111112 Bogotá, Colombia; (S.L.M.); (A.M.F.); (F.I.A.); (L.C.); (D.M.); (A.G.S.-H.)
| |
Collapse
|
6
|
Yao JW, Chi WC, Lee GH, Su JH, Hwang TL, Wu YJ, Su TR, Sheu JH, Sung PJ. 2-Acetoxybriaranes from Briareum violaceum. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.05.053] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|