|
1
|
Shao S, Wang X, She J, Zhang H, Pang X, Lin X, Zhou X, Liu Y, Li Y, Yang B. Diversified Chaetoglobosins from the Marine-Derived Fungus Emericellopsis sp. SCSIO41202. Molecules 2022; 27:molecules27061823. [PMID: 35335187 PMCID: PMC8948984 DOI: 10.3390/molecules27061823] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Revised: 02/28/2022] [Accepted: 03/08/2022] [Indexed: 11/16/2022] Open
Abstract
Two undescribed cytochalasins, emeriglobosins A (1) and B (2), together with nine previously reported analogues (3–11) and two known tetramic acid derivatives (12, 13) were isolated from the solid culture of Emericellopsis sp. SCSIO41202. Their structures, including the absolute configurations of their stereogenic carbons, were fully elucidated based on spectroscopic analysis and the calculated ECD. Some of the isolated compounds were evaluated for their cytotoxicity and enzyme inhibitory activity against acetylcholinesterase (AChE) in vitro. Among them, 8 showed potent AChE inhibitory activity, with an IC50 value of 1.31 μM, and 5 showed significant cytotoxicity against PC-3 cells, with an IC50 value of 2.32 μM.
Collapse
Affiliation(s)
- Surun Shao
- CAS Key Laboratory of Tropical Marine Bio-Resources and Ecology/Guangdong Key Laboratory of Marine Materia Medica/Innovation Academy of South China Sea Ecology and Environmental Engineering, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China; (S.S.); (X.W.); (J.S.); (X.P.); (X.L.); (X.Z.)
- Pharmacy School, Guilin Medical University, Guilin 541004, China;
| | - Xueni Wang
- CAS Key Laboratory of Tropical Marine Bio-Resources and Ecology/Guangdong Key Laboratory of Marine Materia Medica/Innovation Academy of South China Sea Ecology and Environmental Engineering, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China; (S.S.); (X.W.); (J.S.); (X.P.); (X.L.); (X.Z.)
| | - Jianglian She
- CAS Key Laboratory of Tropical Marine Bio-Resources and Ecology/Guangdong Key Laboratory of Marine Materia Medica/Innovation Academy of South China Sea Ecology and Environmental Engineering, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China; (S.S.); (X.W.); (J.S.); (X.P.); (X.L.); (X.Z.)
| | - Han Zhang
- Pharmacy School, Guilin Medical University, Guilin 541004, China;
| | - Xiaoyan Pang
- CAS Key Laboratory of Tropical Marine Bio-Resources and Ecology/Guangdong Key Laboratory of Marine Materia Medica/Innovation Academy of South China Sea Ecology and Environmental Engineering, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China; (S.S.); (X.W.); (J.S.); (X.P.); (X.L.); (X.Z.)
| | - Xiuping Lin
- CAS Key Laboratory of Tropical Marine Bio-Resources and Ecology/Guangdong Key Laboratory of Marine Materia Medica/Innovation Academy of South China Sea Ecology and Environmental Engineering, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China; (S.S.); (X.W.); (J.S.); (X.P.); (X.L.); (X.Z.)
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, China
| | - Xuefeng Zhou
- CAS Key Laboratory of Tropical Marine Bio-Resources and Ecology/Guangdong Key Laboratory of Marine Materia Medica/Innovation Academy of South China Sea Ecology and Environmental Engineering, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China; (S.S.); (X.W.); (J.S.); (X.P.); (X.L.); (X.Z.)
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, China
| | - Yonghong Liu
- CAS Key Laboratory of Tropical Marine Bio-Resources and Ecology/Guangdong Key Laboratory of Marine Materia Medica/Innovation Academy of South China Sea Ecology and Environmental Engineering, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China; (S.S.); (X.W.); (J.S.); (X.P.); (X.L.); (X.Z.)
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, China
- Correspondence: (Y.L.); (Y.L.); (B.Y.); Tel.: +86-20-89023174 (B.Y.)
| | - Yunqiu Li
- Pharmacy School, Guilin Medical University, Guilin 541004, China;
- Correspondence: (Y.L.); (Y.L.); (B.Y.); Tel.: +86-20-89023174 (B.Y.)
| | - Bin Yang
- CAS Key Laboratory of Tropical Marine Bio-Resources and Ecology/Guangdong Key Laboratory of Marine Materia Medica/Innovation Academy of South China Sea Ecology and Environmental Engineering, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China; (S.S.); (X.W.); (J.S.); (X.P.); (X.L.); (X.Z.)
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, China
- Correspondence: (Y.L.); (Y.L.); (B.Y.); Tel.: +86-20-89023174 (B.Y.)
| |
Collapse
|
|
2
|
Li QQ, Kang OH, Kwon DY. Study on Demethoxycurcumin as a Promising Approach to Reverse Methicillin-Resistance of Staphylococcus aureus. Int J Mol Sci 2021; 22:ijms22073778. [PMID: 33917423 PMCID: PMC8038695 DOI: 10.3390/ijms22073778] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Revised: 03/31/2021] [Accepted: 04/03/2021] [Indexed: 12/19/2022] Open
Abstract
Methicillin-resistant Staphylococcus aureus (MRSA) has always been a threatening pathogen. Research on phytochemical components that can replace antibiotics with limited efficacy may be an innovative method to solve intractable MRSA infections. The present study was devoted to investigate the antibacterial activity of the natural compound demethoxycurcumin (DMC) against MRSA and explore its possible mechanism for eliminating MRSA. The minimum inhibitory concentrations (MICs) of DMC against MRSA strains was determined by the broth microdilution method, and the results showed that the MIC of DMC was 62.5 μg/mL. The synergistic effects of DMC and antibiotics were investigated by the checkerboard method and the time–kill assay. The ATP synthase inhibitors were employed to block the metabolic ability of bacteria to explore their synergistic effect on the antibacterial ability of DMC. In addition, western blot analysis and qRT-PCR were performed to detect the proteins and genes related to drug resistance and S. aureus exotoxins. As results, DMC hindered the translation of penicillin-binding protein 2a (PBP2a) and staphylococcal enterotoxin and reduced the transcription of related genes. This study provides experimental evidences that DMC has the potential to be a candidate substance for the treatment of MRSA infections.
Collapse
Affiliation(s)
| | - Ok-Hwa Kang
- Correspondence: (O.-H.K.); (D.-Y.K.); Tel.: +82-63-850-6802 (O.-H.K. & D.-Y.K.)
| | - Dong-Yeul Kwon
- Correspondence: (O.-H.K.); (D.-Y.K.); Tel.: +82-63-850-6802 (O.-H.K. & D.-Y.K.)
| |
Collapse
|
|
3
|
Wijesundara NM, Lee SF, Cheng Z, Davidson R, Rupasinghe HPV. Carvacrol exhibits rapid bactericidal activity against Streptococcus pyogenes through cell membrane damage. Sci Rep 2021; 11:1487. [PMID: 33452275 PMCID: PMC7811018 DOI: 10.1038/s41598-020-79713-0] [Citation(s) in RCA: 45] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Accepted: 12/07/2020] [Indexed: 12/13/2022] Open
Abstract
Streptococcus pyogenes is an important human pathogen worldwide. The identification of natural antibacterial phytochemicals has renewed interest due to the current scarcity of antibiotic development. Carvacrol is a monoterpenoid found in herbs. We evaluated carvacrol alone and combined with selected antibiotics against four strains of S. pyogenes in vitro. The minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) of carvacrol against S. pyogenes were 125 µg/mL (0.53 mM) and 250 µg/mL (1.05 mM), respectively. Kill curve results showed that carvacrol exhibits instantaneous bactericidal activity against S. pyogenes. We also demonstrated the potential mechanism of action of carvacrol through compromising the cell membrane integrity. Carvacrol induced membrane integrity changes leading to leakage of cytoplasmic content such as lactate dehydrogenase enzymes and nucleic acids. We further confirmed dose-dependent rupturing of cells and cell deaths using transmission electron microscopy. The chequerboard assay results showed that carvacrol possesses an additive-synergistic effect with clindamycin or penicillin. Carvacrol alone, combined with clindamycin or penicillin, can be used as a safe and efficacious natural health product for managing streptococcal pharyngitis.
Collapse
Affiliation(s)
- Niluni M Wijesundara
- Department of Plant, Food, and Environmental Sciences, Faculty of Agriculture, Dalhousie University, Truro, NS, Canada.,Department of Biology, Faculty of Science, Dalhousie University, Halifax, NS, Canada.,Department of Animal Science, Faculty of Animal Science and Export Agriculture, Uva Wellassa University, Badulla, Sri Lanka
| | - Song F Lee
- Department of Microbiology & Immunology, Faculty of Medicine, Dalhousie University, Halifax, NS, Canada.,Department of Applied Oral Sciences, Faculty of Dentistry, Dalhousie University, Halifax, NS, Canada.,Canadian Center for Vaccinology, Nova Scotia Health Authority, and the Izaak Walton Killam Health Centre, Dalhousie University, Halifax, NS, Canada
| | - Zhenyu Cheng
- Department of Microbiology & Immunology, Faculty of Medicine, Dalhousie University, Halifax, NS, Canada
| | - Ross Davidson
- Department of Microbiology & Immunology, Faculty of Medicine, Dalhousie University, Halifax, NS, Canada.,Canadian Center for Vaccinology, Nova Scotia Health Authority, and the Izaak Walton Killam Health Centre, Dalhousie University, Halifax, NS, Canada.,Department of Pathology, Faculty of Medicine, Dalhousie University, Halifax, NS, Canada.,Division of Microbiology at the Queen Elizabeth II Health Sciences Centre, Department of Pathology and Laboratory Medicine, Nova Scotia Health Authority, Halifax, NS, Canada
| | - H P Vasantha Rupasinghe
- Department of Plant, Food, and Environmental Sciences, Faculty of Agriculture, Dalhousie University, Truro, NS, Canada. .,Department of Biology, Faculty of Science, Dalhousie University, Halifax, NS, Canada. .,Department of Pathology, Faculty of Medicine, Dalhousie University, Halifax, NS, Canada. .,National Institute of Fundamental Studies, Kandy, Sri Lanka.
| |
Collapse
|
|
4
|
Wang YN, Meng LH, Wang BG. Progress in Research on Bioactive Secondary Metabolites from Deep-Sea Derived Microorganisms. Mar Drugs 2020; 18:E614. [PMID: 33276592 PMCID: PMC7761599 DOI: 10.3390/md18120614] [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: 10/29/2020] [Revised: 11/25/2020] [Accepted: 11/30/2020] [Indexed: 12/15/2022] Open
Abstract
Deep sea has an extreme environment which leads to biodiversity of microorganisms and their unique physical and biochemical mechanisms. Deep-sea derived microorganisms are more likely to produce novel bioactive substances with special mechanism of action for drug discovery. This article reviews secondary metabolites with biological activities such as anti-tumor, anti-bacterial, anti-viral, and anti-inflammatory isolated from deep-sea fungi and bacteria during 2018-2020. Effective methods for screening and obtaining natural active compounds from deep-sea microorganisms are also summarized, including optimizing the culture conditions, using genome mining technology, biosynthesis and so on. The comprehensive application of these methods makes broader prospects for the development and application of deep sea microbial bioactive substances.
Collapse
Affiliation(s)
- Ya-Nan Wang
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Nanhai Road 7, Qingdao 266071, China;
- Laboratory of Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Wenhai Road 1, Qingdao 266237, China
- College of Earth Science, University of Chinese Academy of Sciences, Yuquan Road 19A, Beijing 100049, China
| | - Ling-Hong Meng
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Nanhai Road 7, Qingdao 266071, China;
- Laboratory of Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Wenhai Road 1, Qingdao 266237, China
| | - Bin-Gui Wang
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Nanhai Road 7, Qingdao 266071, China;
- Laboratory of Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Wenhai Road 1, Qingdao 266237, China
- Center for Ocean Mega-Science, Chinese Academy of Sciences, Nanhai Road 7, Qingdao 266071, China
| |
Collapse
|