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Jiang S, Xu L, Zhong Y, Zhang C, Yu X, Li K, Ding L, Wang X. Hemicyanine-Based Highly Water-Soluble Probe for Extracellular Nitroreductase. Chembiochem 2024; 25:e202400257. [PMID: 38847484 DOI: 10.1002/cbic.202400257] [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: 03/20/2024] [Revised: 05/29/2024] [Indexed: 07/19/2024]
Abstract
Nitroreductase (NTR) has long been a target of interest for its important role involved in the nitro compounds metabolism. Various probes have been reported for NTR analysis, but rarely able to distinguish the extracellular NTR from intracellular ones. Herein we reported a new NTR sensor, HCyS-NO2, which was a hemicyanine molecule with one nitro and two sulfo groups attached. The nitro group acted as the reporting group to respond NTR reduction. Direct linkage of nitro group into the hemicyanine π conjugate system facilitated the intramolecular electron transfer (IET) process and thus quenched the fluorescence of hemicyanine core. Upon reduction with NTR, the nitro group was rapidly converted into the hydroxylamino and then the amino group, eliminating IET process and thus restoring the fluorescence. The sulfo groups installed significantly increased the hydrophilicity of the molecule, and introduced negative charges at physiological pH, preventing the diffusion into bacteria. Both gram-negative and gram-positive bacteria were able to turn on the fluorescence of HCyS-NO2, without detectable diffusion into cells, providing a useful tool to probe the extracellular reduction process.
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Affiliation(s)
- Shaoli Jiang
- Institute of Advanced Synthesis, Institute of Chemical Biology and Functional Molecules, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing, 211816, China
| | - Le Xu
- Institute of Advanced Synthesis, Institute of Chemical Biology and Functional Molecules, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing, 211816, China
| | - Yihong Zhong
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
| | - Chuangchuang Zhang
- Institute of Advanced Synthesis, Institute of Chemical Biology and Functional Molecules, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing, 211816, China
| | - Xiaoyu Yu
- Institute of Advanced Synthesis, Institute of Chemical Biology and Functional Molecules, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing, 211816, China
| | - Ke Li
- Institute of Advanced Synthesis, Institute of Chemical Biology and Functional Molecules, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing, 211816, China
| | - Lin Ding
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
| | - Xiaojian Wang
- Institute of Advanced Synthesis, Institute of Chemical Biology and Functional Molecules, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing, 211816, China
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Hertrampf G, Vojnovic S, Müller JI, Merten C, Nikodinovic-Runic J, Gulder TAM. Synthesis, Stereochemical Determination, and Antimicrobial Evaluation of Myxocoumarin A. J Org Chem 2023; 88:14184-14188. [PMID: 37708429 DOI: 10.1021/acs.joc.3c01285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/16/2023]
Abstract
The myxobacterial natural product myxocoumarin A from Stigmatella aurantiaca MYX-030 has remarkable antifungal activity against agriculturally relevant pathogens. To broaden the initial evaluation of its biological potential, we herein completed the first total synthesis of myxocoumarin A. This synthetic access facilitated stereochemical investigations on the natural product structure, revealing its (R)-configuration. Biological activity profiling showed a lack of activity against Candida spp. and Gram-negative bacteria but revealed strong antibiotic activities against Bacillus subtilis and Staphylococcus aureus, including MRSA.
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Affiliation(s)
- Gesa Hertrampf
- Chair of Technical Biochemistry, Technical University of Dresden, Bergstraße 66, 01069 Dresden, Germany
| | - Sandra Vojnovic
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Vojvode Stepe 444a, Belgrade, 11000, Serbia
| | - Jonas I Müller
- Chair of Technical Biochemistry, Technical University of Dresden, Bergstraße 66, 01069 Dresden, Germany
| | - Christian Merten
- Organic Chemistry II, Ruhr University Bochum, Universitätsstraße 150, 44801 Bochum, Germany
| | - Jasmina Nikodinovic-Runic
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Vojvode Stepe 444a, Belgrade, 11000, Serbia
| | - Tobias A M Gulder
- Chair of Technical Biochemistry, Technical University of Dresden, Bergstraße 66, 01069 Dresden, Germany
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Department of Natural Product Biotechnology, Helmholtz Centre for Infection Research (HZI) and Department of Pharmacy at Saarland University, Campus E8.1, 66123, Saarbrücken, Germany
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Shen Y, Sheng R, Guo R. Application of Zebrafish as a Model for Anti-Cancer Activity Evaluation and Toxicity Testing of Natural Products. Pharmaceuticals (Basel) 2023; 16:827. [PMID: 37375774 DOI: 10.3390/ph16060827] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Revised: 05/27/2023] [Accepted: 05/28/2023] [Indexed: 06/29/2023] Open
Abstract
Developing natural product-based anti-cancer drugs/agents is a promising way to overcome the serious side effects and toxicity of traditional chemotherapeutics for cancer treatment. However, rapid assessment of the in vivo anti-cancer activities of natural products is a challenge. Alternatively, zebrafish are useful model organisms and perform well in addressing this challenging issue. Nowadays, a growing number of studies have utilized zebrafish models to evaluate the in vivo activities of natural compounds. Herein, we reviewed the application of zebrafish models for evaluating the anti-cancer activity and toxicity of natural products over the past years, summarized its process and benefits, and provided future outlooks for the development of natural product-based anti-cancer drugs.
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Affiliation(s)
- Yifan Shen
- College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China
| | - Ruilong Sheng
- CQM-Centro de Química da Madeira, Campus da Penteada, Universidade da Madeira, 9000-390 Funchal, Portugal
| | - Ruihua Guo
- College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China
- Shanghai Engineering Research Center of Aquatic-Product Processing & Preservation, Shanghai 201306, China
- Laboratory of Quality and Safety Risk Assessment for Aquatic Products on Storage and Preservation (Shanghai), Ministry of Agriculture, Shanghai 201306, China
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Hertrampf G, Kusserow K, Vojnovic S, Pavic A, Müller JI, Nikodinovic‐Runic J, Gulder TAM. Strong Antibiotic Activity of the Myxocoumarin Scaffold in vitro and in vivo. Chemistry 2022; 28:e202200394. [PMID: 35229915 PMCID: PMC9321099 DOI: 10.1002/chem.202200394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Indexed: 11/14/2022]
Abstract
The increasing emergence of resistances against established antibiotics is a substantial threat to human health. The discovery of new compounds with potent antibiotic activity is thus of utmost importance. Within this work, we identify strong antibiotic activity of the natural product myxocoumarin B from Stigmatella aurantiaca MYX-030 against a range of clinically relevant bacterial pathogens, including clinical isolates of MRSA. A focused library of structural analogs was synthesized to explore initial structure-activity relationships and to identify equipotent myxocoumarin derivatives devoid of the natural nitro substituent to significantly streamline synthetic access. The cytotoxicity of the myxocoumarins as well as their potential to cure bacterial infections in vivo was established using a zebrafish model system. Our results reveal the exceptional antibiotic activity of the myxocoumarin scaffold and hence its potential for the development of novel antibiotics.
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Affiliation(s)
- Gesa Hertrampf
- Chair of Technical BiochemistryTechnical University of DresdenBergstraße 6601069DresdenGermany
| | - Kalina Kusserow
- Biosystems ChemistryTechnical University of MunichLichtenbergstraße 485748Garching bei MünchenGermany
| | - Sandra Vojnovic
- Institute of Molecular Genetics and Genetic EngineeringUniversity of BelgradeVojvode Stepe 444aBelgrade11000Serbia
| | - Aleksandar Pavic
- Institute of Molecular Genetics and Genetic EngineeringUniversity of BelgradeVojvode Stepe 444aBelgrade11000Serbia
| | - Jonas I. Müller
- Chair of Technical BiochemistryTechnical University of DresdenBergstraße 6601069DresdenGermany
| | - Jasmina Nikodinovic‐Runic
- Institute of Molecular Genetics and Genetic EngineeringUniversity of BelgradeVojvode Stepe 444aBelgrade11000Serbia
| | - Tobias A. M. Gulder
- Chair of Technical BiochemistryTechnical University of DresdenBergstraße 6601069DresdenGermany
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Zhang CY, Peng XX, Shao HQ, Li XY, Wu Y, Tan ZJ. Gut Microbiota Comparison Between Intestinal Contents and Mucosa in Mice With Repeated Stress-Related Diarrhea Provides Novel Insight. Front Microbiol 2021; 12:626691. [PMID: 33708183 PMCID: PMC7940357 DOI: 10.3389/fmicb.2021.626691] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Accepted: 01/25/2021] [Indexed: 12/20/2022] Open
Abstract
Repeated stress-related diarrhea is a kind of functional bowel disorders (FBDs) that are mainly stemming from dysregulation of the microbiota–gut–brain axis mediated by a complex interplay of 5-hydroxytryptophan (5-HT). Intestinal content and intestinal mucosa microbiota belong to two different community systems, and the role of the two microbiota community systems in repeated stress-related diarrhea remains largely unknown. In order to ascertain the difference in composition and the potential function between intestinal content and intestinal mucosa microbiota response on repeated stress-related diarrhea, we collected intestinal contents and mucosa of mice with repeated stress-related diarrhea for 16S rRNA PacBio SMRT gene full-length sequencing, and with the digital modeling method of bacterial species abundance, the correlations among the two microbiota community systems and serum 5-HT concentration were analyzed. We found that the microbiotal composition differences both in intestinal contents and mucosa were consistent throughout all the phylogenetic ranks, with an increasing level of resolution. Compared with intestinal content microbiota, the diversity and composition of microbiota colonized in intestinal mucosa are more sensitive to repeated stress-related diarrhea. The PICRUSt2 of metagenomic function analysis found that repeated stress-related diarrhea is more likely to perturb the intestinal mucosa microbiota metagenomic functions involved in the neural response. We further found that the mucosal microbiota-based relative abundance model was more predictive on serum 5-HT concentration with the methods of machine-learning model established and multivariate dimensionality reduction (R2 = 0.876). These findings suggest that the intestinal mucosa microbiota might serve as a novel potential prediction model for the serum 5-HT concentration involvement in the repeated stress-related diarrhea, in addition to focusing on its mechanism in the gastrointestinal dysfunction.
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Affiliation(s)
- Chen-Yang Zhang
- College of Traditional Chinese Medicine, Hunan University of Chinese Medicine, Changsha, China.,Hunan Key Laboratory of Traditional Chinese Medicine (TCM) Prescription and Syndromes Translational Medicine, Changsha, China
| | - Xin-Xin Peng
- Department of Pediatrics, The First Affiliated Hospital of Hunan University of Chinese Medicine, Changsha, China
| | - Hao-Qing Shao
- College of Traditional Chinese Medicine, Hunan University of Chinese Medicine, Changsha, China
| | - Xiao-Ya Li
- College of Traditional Chinese Medicine, Hunan University of Chinese Medicine, Changsha, China
| | - Yi Wu
- College of Traditional Chinese Medicine, Hunan University of Chinese Medicine, Changsha, China
| | - Zhou-Jin Tan
- College of Traditional Chinese Medicine, Hunan University of Chinese Medicine, Changsha, China.,Hunan Key Laboratory of Traditional Chinese Medicine (TCM) Prescription and Syndromes Translational Medicine, Changsha, China
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Optimization of a Catalytic Chemoenzymatic Tandem Reaction for the Synthesis of Natural Stilbenes in Continuous Flow. Catalysts 2020. [DOI: 10.3390/catal10121404] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
In view of the development of efficient processes for the synthesis of high-value compounds, the combination of bio- and chemocatalysis is highly promising. In addition, implementation of immobilized catalysts into continuous setups allows a straightforward separation of the target compound from the reaction mixture and ensures uniform product quality. In this work, we report the optimization of a chemoenzymatic tandem reaction in continuous flow and its extended application for the synthesis of pharmacologically active resveratrol and pterostilbene. The tandem reaction involves enzymatic decarboxylation of coumaric acid employing encapsulated phenolic acid decarboxylase from B. subtilis and a Heck coupling of the obtained vinylphenol with an aryl iodide using heterogeneous Pd-Ce-Sn oxides implemented in a packed bed reactor. By optimization of the reaction conditions for the limiting cross-coupling step, the yield of (E)-4-hydroxystilbene using the fully continuous setup could be more than doubled compared to previous work. Furthermore, the improved chemoenzymatic cascade could also be applied to the synthesis of resveratrol and pterostilbene in a continuous fashion. Leaching of the metal catalyst at high temperatures limited the process in many perspectives. Therefore, the feasibility of a reactor setup with reversed flow was experimentally evaluated and approved.
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Microbiotal characteristics colonized in intestinal mucosa of mice with diarrhoea and repeated stress. 3 Biotech 2020; 10:372. [PMID: 32832332 DOI: 10.1007/s13205-020-02368-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Accepted: 07/27/2020] [Indexed: 12/27/2022] Open
Abstract
To understand the role of intestinal mucosal microbiota on mental stress-related diarrhoea, we collected the intestinal mucosa of mice treated with Folium senna extract gavage combined with restraint and tail pinch stress for 7 days; and intestinal mucosal microbiota characteristics were analyzed by 16S rRNA Pacbio SMRT gene full-length sequencing. The results showed that the diversity (i.e., alpha diversity including the Chao1, Simpson, ACE, and Shannon indices and beta diversity including the NMDS of weighted UniFrac distances) and composition of the microbial community in the intestinal mucosa of mice with diarrhoea and repeated stress changed significantly (P < 0.05). In the co-occurrence network, Staphylococcus sciuri and Escherichia fergusonii was identified as putative keystone species. Moreover, the characteristics of the intestinal microbial species was analyzed by LEfSe, Metastats, and group difference, and ten altered gut microbiota species can be used as characteristic microbes in the mice with diarrhoea and repeated stress: the abundances of Stigmatella aurantiaca, Candidatus arthromitus sp. SFB-mouse, Erythrobacter gaetbuli, Desulfitobacterium hafniense, Ochrobactrum pituitosum, and Candidatus arthromitus sp. SFB-mouse-NL in the model group were significantly lower than those in the control group (P < 0.05); whereas Microbacterium dextranolyticum, Klebsiella pneumoniae, Escherichia sp. BBDP27, and Streptococcus danieliae were enriched in the control group (P < 0.05). Collectively, mental stress-related diarrhoea increased the intestinal microbiota diversity. The species associated with mental stress-related diarrhoea including Microbacterium dextranolyticum, Klebsiella pneumoniae, Escherichia sp. BBDP27, and Streptococcus danieliae were significantly enriched; while the species which are beneficial to mental stress-related diarrhoea are Stigmatella aurantiaca, Candidatus arthromitus sp. SFB-mouse, Erythrobacter gaetbuli, Desulfitobacterium hafniense, Ochrobactrum pituitosum, and Candidatus arthromitus sp. SFB-mouse-NL for its significantly depleted.
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