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Borsato G, Carnio F, Lunardon S, Moletta M, Pavan G, Terrin F, Scarso A, Plotegher N, Fabris F. A β-Glucosyl Sterol Probe for in situ Fluorescent Labelling in Neuronal Cells to Investigate Neurodegenerative Diseases. Chemistry 2024; 30:e202400778. [PMID: 38770991 DOI: 10.1002/chem.202400778] [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: 02/26/2024] [Revised: 05/17/2024] [Accepted: 05/21/2024] [Indexed: 05/22/2024]
Abstract
A β-glucosyl sterol probe bearing a terminal alkyne moiety for fluorescent tagging enables the investigation of the neuronal and intracellular localization of this class of compounds involved in neurodegenerative diseases. The compound showed localization in the neuronal cells, with marked differences in the uptake and metabolism leading to enhanced persistence with respect to the un-glycosylated sterol analogue. In addition, a different impact was observed towards lysosomes, with the simple sterol probe showing the enlargement of the lysosome structures, while the β-glucosyl sterol was less capable to alter the morphology of this specific organelle.
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Affiliation(s)
- Giuseppe Borsato
- Dipartimento di Scienze Molecolari e Nanosistemi, Università Ca' Foscari Venezia, via Torino 155, 30172, Mestre Venezia, Italy
| | - Francesco Carnio
- Dipartimento di Scienze Molecolari e Nanosistemi, Università Ca' Foscari Venezia, via Torino 155, 30172, Mestre Venezia, Italy
| | - Sara Lunardon
- Dipartimento di Scienze Molecolari e Nanosistemi, Università Ca' Foscari Venezia, via Torino 155, 30172, Mestre Venezia, Italy
| | - Mattia Moletta
- Dipartimento di Scienze Molecolari e Nanosistemi, Università Ca' Foscari Venezia, via Torino 155, 30172, Mestre Venezia, Italy
| | - Giulio Pavan
- Dipartimento di Scienze Molecolari e Nanosistemi, Università Ca' Foscari Venezia, via Torino 155, 30172, Mestre Venezia, Italy
| | - Francesca Terrin
- Dipartimento di Biologia, Università degli Studi di Padova, viale G. Colombo 3, 35131, Padova, Italy
| | - Alessandro Scarso
- Dipartimento di Scienze Molecolari e Nanosistemi, Università Ca' Foscari Venezia, via Torino 155, 30172, Mestre Venezia, Italy
| | - Nicoletta Plotegher
- Dipartimento di Biologia, Università degli Studi di Padova, viale G. Colombo 3, 35131, Padova, Italy
| | - Fabrizio Fabris
- Dipartimento di Scienze Molecolari e Nanosistemi, Università Ca' Foscari Venezia, via Torino 155, 30172, Mestre Venezia, Italy
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Ong LL, Jan HM, Le HHT, Yang TC, Kuo CY, Feng AF, Mong KKT, Lin CH. Membrane lipid remodeling eradicates Helicobacter pylori by manipulating the cholesteryl 6'-acylglucoside biosynthesis. J Biomed Sci 2024; 31:44. [PMID: 38685037 PMCID: PMC11057186 DOI: 10.1186/s12929-024-01031-8] [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: 01/03/2024] [Accepted: 04/14/2024] [Indexed: 05/02/2024] Open
Abstract
BACKGROUND Helicobacter pylori, the main cause of various gastric diseases, infects approximately half of the human population. This pathogen is auxotrophic for cholesterol which it converts to various cholesteryl α-glucoside derivatives, including cholesteryl 6'-acyl α-glucoside (CAG). Since the related biosynthetic enzymes can be translocated to the host cells, the acyl chain of CAG likely comes from its precursor phosphatidylethanolamine (PE) in the host membranes. This work aims at examining how the acyl chain of CAG and PE inhibits the membrane functions, especially bacterial adhesion. METHODS Eleven CAGs that differ in acyl chains were used to study the membrane properties of human gastric adenocarcinoma cells (AGS cells), including lipid rafts clustering (monitored by immunofluorescence with confocal microscopy) and lateral membrane fluidity (by the fluorescence recovery after photobleaching). Cell-based and mouse models were employed to study the degree of bacterial adhesion, the analyses of which were conducted by using flow cytometry and immunofluorescence staining, respectively. The lipidomes of H. pylori, AGS cells and H. pylori-AGS co-cultures were analyzed by Ultraperformance Liquid Chromatography-Tandem Mass Spectroscopy (UPLC-MS/MS) to examine the effect of PE(10:0)2, PE(18:0)2, PE(18:3)2, or PE(22:6)2 treatments. RESULTS CAG10:0, CAG18:3 and CAG22:6 were found to cause the most adverse effect on the bacterial adhesion. Further LC-MS analysis indicated that the treatment of PE(10:0)2 resulted in dual effects to inhibit the bacterial adhesion, including the generation of CAG10:0 and significant changes in the membrane compositions. The initial (1 h) lipidome changes involved in the incorporation of 10:0 acyl chains into dihydro- and phytosphingosine derivatives and ceramides. In contrast, after 16 h, glycerophospholipids displayed obvious increase in their very long chain fatty acids, monounsaturated and polyunsaturated fatty acids that are considered to enhance membrane fluidity. CONCLUSIONS The PE(10:0)2 treatment significantly reduced bacterial adhesion in both AGS cells and mouse models. Our approach of membrane remodeling has thus shown great promise as a new anti-H. pylori therapy.
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Affiliation(s)
- Lih-Lih Ong
- Institute of Biological Chemistry, Academia Sinica, No. 128, Academia Road Section 2, Nan-Kang, Taipei, 11529, Taiwan
- Department of Applied Chemistry, National Yang Ming Chiao Tung University, 1001, University Road, Eastern District, Hsinchu, 300093, Taiwan
- Institute of Chemistry, Academia Sinica, No. 128, Academia Road Section 2, Nan-Kang, Taipei, 11529, Taiwan
- Sustainable Chemical Science and Technology, Taiwan International Graduate Program, Academia Sinica, No. 128, Academia Road Section 2, Nan-Kang, Taipei, 11529, Taiwan
| | - Hau-Ming Jan
- Institute of Biological Chemistry, Academia Sinica, No. 128, Academia Road Section 2, Nan-Kang, Taipei, 11529, Taiwan
- Joint Program in Transfusion Medicine, Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, USA
| | - Hong-Hanh Thi Le
- Institute of Biological Chemistry, Academia Sinica, No. 128, Academia Road Section 2, Nan-Kang, Taipei, 11529, Taiwan
| | - Tsai-Chen Yang
- Institute of Biological Chemistry, Academia Sinica, No. 128, Academia Road Section 2, Nan-Kang, Taipei, 11529, Taiwan
| | - Chou-Yu Kuo
- Institute of Biological Chemistry, Academia Sinica, No. 128, Academia Road Section 2, Nan-Kang, Taipei, 11529, Taiwan
| | - Ai-Feng Feng
- Department of Applied Chemistry, National Yang Ming Chiao Tung University, 1001, University Road, Eastern District, Hsinchu, 300093, Taiwan
| | - Kwok-Kong Tony Mong
- Department of Applied Chemistry, National Yang Ming Chiao Tung University, 1001, University Road, Eastern District, Hsinchu, 300093, Taiwan.
| | - Chun-Hung Lin
- Institute of Biological Chemistry, Academia Sinica, No. 128, Academia Road Section 2, Nan-Kang, Taipei, 11529, Taiwan.
- Department of Chemistry and Institute of Biochemical Sciences, National Taiwan University, Taipei, 10617, Taiwan.
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3
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Rosli NA, Al-Maleki AR, Loke MF, Tay ST, Rofiee MS, Teh LK, Salleh MZ, Vadivelu J. Exposure of Helicobacter pylori to clarithromycin in vitro resulting in the development of resistance and triggers metabolic reprogramming associated with virulence and pathogenicity. PLoS One 2024; 19:e0298434. [PMID: 38446753 PMCID: PMC10917248 DOI: 10.1371/journal.pone.0298434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Accepted: 01/23/2024] [Indexed: 03/08/2024] Open
Abstract
In H. pylori infection, antibiotic-resistance is one of the most common causes of treatment failure. Bacterial metabolic activities, such as energy production, bacterial growth, cell wall construction, and cell-cell communication, all play important roles in antimicrobial resistance mechanisms. Identification of microbial metabolites may result in the discovery of novel antimicrobial therapeutic targets and treatments. The purpose of this work is to assess H. pylori metabolomic reprogramming in order to reveal the underlying mechanisms associated with the development of clarithromycin resistance. Previously, four H. pylori isolates were induced to become resistant to clarithromycin in vitro by incrementally increasing the concentrations of clarithromycin. Bacterial metabolites were extracted using the Bligh and Dyer technique and analyzed using metabolomic fingerprinting based on Liquid Chromatography Quadrupole Time-of-Flight Mass Spectrometry (LC-Q-ToF-MS). The data was processed and analyzed using the MassHunter Qualitative Analysis and Mass Profiler Professional software. In parental sensitivity (S), breakpoint isolates (B), and induced resistance isolates (R) H. pylori isolates, 982 metabolites were found. Furthermore, based on accurate mass, isotope ratios, abundances, and spacing, 292 metabolites matched the metabolites in the Agilent METLIN precise Mass-Personal Metabolite Database and Library (AM-PCDL). Several metabolites associated with bacterial virulence, pathogenicity, survival, and proliferation (L-leucine, Pyridoxone [Vitamine B6], D-Mannitol, Sphingolipids, Indoleacrylic acid, Dulcitol, and D-Proline) were found to be elevated in generated resistant H. pylori isolates when compared to parental sensitive isolates. The elevated metabolites could be part of antibiotics resistance mechanisms. Understanding the fundamental metabolome changes in the course of progressing from clarithromycin-sensitive to breakpoint to resistant in H. pylori clinical isolates may be a promising strategy for discovering novel alternatives therapeutic targets.
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Affiliation(s)
- Naim Asyraf Rosli
- Faculty of Medicine, Department of Medical Microbiology, Universiti Malaya, Kuala Lumpur, Malaysia
| | - Anis Rageh Al-Maleki
- Faculty of Medicine, Department of Medical Microbiology, Universiti Malaya, Kuala Lumpur, Malaysia
- Faculty of Medicine and Health Sciences, Department of Medical Microbiology, Sana’a University, Sana’a, Yemen
| | - Mun Fai Loke
- Camtech Biomedical Pte Ltd, Singapore, Singapore
| | - Sun Tee Tay
- Faculty of Medicine, Department of Medical Microbiology, Universiti Malaya, Kuala Lumpur, Malaysia
| | - Mohd Salleh Rofiee
- Integrative Pharmacogenomics Institute (iPROMISE), Universiti Teknologi MARA, Selangor, Malaysia
| | - Lay Kek Teh
- Integrative Pharmacogenomics Institute (iPROMISE), Universiti Teknologi MARA, Selangor, Malaysia
| | - Mohd Zaki Salleh
- Integrative Pharmacogenomics Institute (iPROMISE), Universiti Teknologi MARA, Selangor, Malaysia
| | - Jamuna Vadivelu
- Faculty of Medicine, Medical Education Research and Development Unit (MERDU), Universiti Malaya, Kuala Lumpur, Malaysia
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Zhang H, Xie Y, Cao F, Song X. Gut microbiota-derived fatty acid and sterol metabolites: biotransformation and immunomodulatory functions. Gut Microbes 2024; 16:2382336. [PMID: 39046079 PMCID: PMC11271093 DOI: 10.1080/19490976.2024.2382336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Revised: 05/26/2024] [Accepted: 07/16/2024] [Indexed: 07/25/2024] Open
Abstract
Commensal microorganisms in the human gut produce numerous metabolites by using small molecules derived from the host or diet as precursors. Host or dietary lipid molecules are involved in energy metabolism and maintaining the structural integrity of cell membranes. Notably, gut microbes can convert these lipids into bioactive signaling molecules through their biotransformation and synthesis pathways. These microbiota-derived lipid metabolites can affect host physiology by influencing the body's immune and metabolic processes. This review aims to summarize recent advances in the microbial transformation and host immunomodulatory functions of these lipid metabolites, with a special focus on fatty acids and steroids produced by our gut microbiota.
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Affiliation(s)
- Haohao Zhang
- Key Laboratory of Multi-Cell Systems, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - Yadong Xie
- Key Laboratory of Multi-Cell Systems, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - Fei Cao
- Key Laboratory of Multi-Cell Systems, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - Xinyang Song
- Key Laboratory of Multi-Cell Systems, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
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5
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Wu S, Chen Y, Chen Z, Wei F, Zhou Q, Li P, Gu Q. Reactive oxygen species and gastric carcinogenesis: The complex interaction between Helicobacter pylori and host. Helicobacter 2023; 28:e13024. [PMID: 37798959 DOI: 10.1111/hel.13024] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Revised: 09/10/2023] [Accepted: 09/21/2023] [Indexed: 10/07/2023]
Abstract
Helicobacter pylori (H. pylori) is a highly successful human pathogen that colonizes stomach in around 50% of the global population. The colonization of bacterium induces an inflammatory response and a substantial rise in the production of reactive oxygen species (ROS) and reactive nitrogen species (RNS), mostly derived from host neutrophils and gastric epithelial cells, which play a crucial role in combating bacterial infections. However, H. pylori has developed various strategies to quench the deleterious effects of ROS, including the production of antioxidant enzymes, antioxidant proteins as well as blocking the generation of oxidants. The host's inability to eliminate H. pylori infection results in persistent ROS production. Notably, excessive ROS can disrupt the intracellular signal transduction and biological processes of the host, incurring chronic inflammation and cellular damage, such as DNA damage, lipid peroxidation, and protein oxidation. Markedly, the sustained inflammatory response and oxidative stress during H. pylori infection are major risk factor for gastric carcinogenesis. In this context, we summarize the literature on H. pylori infection-induced ROS production, the strategies used by H. pylori to counteract the host response, and subsequent host damage and gastric carcinogenesis.
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Affiliation(s)
- Shiying Wu
- Key Laboratory for Food Microbial Technology of Zhejiang Province, College of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, China
| | - Yongqiang Chen
- Key Laboratory for Food Microbial Technology of Zhejiang Province, College of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, China
| | - Ziqi Chen
- Key Laboratory for Food Microbial Technology of Zhejiang Province, College of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, China
| | - Fangtong Wei
- Key Laboratory for Food Microbial Technology of Zhejiang Province, College of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, China
| | - Qingqing Zhou
- Key Laboratory for Food Microbial Technology of Zhejiang Province, College of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, China
| | - Ping Li
- Key Laboratory for Food Microbial Technology of Zhejiang Province, College of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, China
| | - Qing Gu
- Key Laboratory for Food Microbial Technology of Zhejiang Province, College of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, China
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Wanibuchi K, Hosoda K, Amgalanbaatar A, Ihara M, Takezawa M, Sakai Y, Masui H, Shoji M, Hayashi S, Shimomura H. Aspects for development of novel antibacterial medicines using a vitamin D 3 decomposition product in Helicobacter pylori infection. J Antibiot (Tokyo) 2023; 76:665-672. [PMID: 37658133 DOI: 10.1038/s41429-023-00651-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Revised: 08/05/2023] [Accepted: 08/10/2023] [Indexed: 09/03/2023]
Abstract
A previous study by our group demonstrated that a vitamin D3 decomposition product (VDP1) acts as the selective bactericidal substance on Helicobacter pylori. VDP1 is an indene compound modified with a carbonyl and an alkyl. The alkyl of VDP1 turned out to be a mandatory structure to exert effective bactericidal action on H. pylori. Meanwhile, it still remains to be clarified as to how influence the alteration of the carbonyl in VDP1 has on the anti-H. pylori activity. In this study, we synthesized novel VDP1 derivatives that replaced the carbonyl of VDP1 by various functional groups and investigated the antibacterial action of the VDP1 derivatives on H. pylori. VDP1 derivatives retaining either a hydroxy (VD3-1) or an acetic ester (VD3-3) exhibited more effective bactericidal action to H. pylori than VDP1. The replacement of the carbonyl of VDP1 by either an allyl acetate (VD3-2) or an acrylic acid (VD3-5) provided almost no change to the anti-H. pylori activity. Apart from this, an isomer of VDP1 (VD3-4) slightly improved anti-H. pylori activity of VDP1. Meanwhile, the replacement of the carbonyl of VDP1 by a methyl acrylate (VD3-6) attenuated the anti-H. pylori activity. As with VDP1, its derivatives also were suggested to exert the anti-H. pylori action through the interaction with myristic acid side chains of dimyristoyl-phosphatidylethanolamine, a characteristic membrane lipid constituent of this pathogen. These results indicate that it is capable of developing specific antibacterial medicines for H. pylori targeting the biomembranal dimyristoyl-phosphatidylethanolamine using VDP1 as the fundamental structure.
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Affiliation(s)
- Kiyofumi Wanibuchi
- Faculty of Pharmaceutical Sciences, Yokohama University of Pharmacy, 601, Matano-cho, Totsuka-ku, Yokohama-shi, Kanagawa, 245-0066, Japan
| | - Kouichi Hosoda
- Nikon Cell Innovation Co., Ltd., 2-4-10, Shinsuna, Koto-ku, Tokyo, 136-0075, Japan
| | - Avarzed Amgalanbaatar
- Department of Graduate Education, Graduate School, Mongolian National University of Medical Sciences, 14210, Zoing street, Sukhbaatar District, Ulaanbaatar, 14210, Mongolia
| | - Masato Ihara
- Faculty of Pharmaceutical Sciences, Yokohama University of Pharmacy, 601, Matano-cho, Totsuka-ku, Yokohama-shi, Kanagawa, 245-0066, Japan
| | - Motoki Takezawa
- Faculty of Pharmaceutical Sciences, Yokohama University of Pharmacy, 601, Matano-cho, Totsuka-ku, Yokohama-shi, Kanagawa, 245-0066, Japan
| | - Yuki Sakai
- Faculty of Pharmaceutical Sciences, Yokohama University of Pharmacy, 601, Matano-cho, Totsuka-ku, Yokohama-shi, Kanagawa, 245-0066, Japan
| | - Hisashi Masui
- Department of Basic Medicinal Sciences, Graduate School of Pharmaceutical Sciences, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8601, Japan
| | - Mitsuru Shoji
- Faculty of Pharmaceutical Sciences, Yokohama University of Pharmacy, 601, Matano-cho, Totsuka-ku, Yokohama-shi, Kanagawa, 245-0066, Japan
| | - Shunji Hayashi
- Department of Microbiology, School of Medicine, Kitasato University, 1-15-1, Kitasato, Minami-ku, Sagamihara-shi, Kanagawa, 252-0374, Japan
| | - Hirofumi Shimomura
- Public Health Center of Uki, Kumamoto Prefecture Office, 400-1, Kugu, Matsubase-machi, Uki-shi, Kumamoto, 869-0532, Japan.
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7
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Kao CY, Chang CT, Kuo PY, Lin CJ, Chiu HH, Liao HW. Sequential isolation of metabolites and lipids from a single sample to achieve multiomics by using TRIzol reagent. Talanta 2023; 258:124416. [PMID: 36889188 DOI: 10.1016/j.talanta.2023.124416] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Revised: 02/13/2023] [Accepted: 03/02/2023] [Indexed: 03/06/2023]
Abstract
Simultaneous extraction of various types of biomolecule from a single sample can be beneficial for multiomics studies of unique specimens. An efficient and convenient sample preparation approach must be developed that can comprehensively isolate and extract biomolecules from one sample. TRIzol reagent is widely used in biological studies for DNA, RNA, and protein isolation. This study evaluated the feasibility of using TRIzol reagent for the simultaneous isolation of not only DNA, RNA, and proteins but also metabolites and lipids from a single sample. Through the comparison of known metabolites and lipids obtained using the conventional methanol (MeOH) and methyl-tert-butyl ether (MTBE) extraction methods, we determined the presence of metabolites and lipids in the supernatant during TRIzol sequential isolation. Finally, we performed untargeted metabolomics and lipidomics to examine metabolite and lipid alterations associated with the jhp0417 mutation in Helicobacter pylori by using the TRIzol sequential isolation protocol and MeOH and MTBE extraction methods. Metabolites and lipids with significant differences isolated using the TRIzol sequential isolation protocol were consistent with those obtained using the conventional MeOH and MTBE extraction methods. These results indicated that TRIzol reagent can be used to simultaneously isolate metabolites and lipids from a single sample. Thus, TRIzol reagent can be used in biological and clinical research, especially in multiomics studies.
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Affiliation(s)
- Cheng-Yen Kao
- Institute of Microbiology and Immunology, College of Life Sciences, National Yang Ming Chiao Tung University, Taipei, 11221, Taiwan
| | - Chung-Te Chang
- Institute of Biochemistry and Molecular Biology, College of Life Sciences, National Yang Ming Chiao Tung University, Taipei, 11221, Taiwan
| | - Pei-Yun Kuo
- Institute of Microbiology and Immunology, College of Life Sciences, National Yang Ming Chiao Tung University, Taipei, 11221, Taiwan
| | - Chia-Jen Lin
- Department of Pharmacy, National Yang Ming Chiao Tung University, Taipei, 11221, Taiwan
| | - Huai-Hsuan Chiu
- The Metabolomics Core Laboratory, Centers of Genomic and Precision Medicine, National Taiwan University, Taipei, 10617, Taiwan; Department of Medical Research, National Taiwan University Hospital, Taipei, 10617, Taiwan
| | - Hsiao-Wei Liao
- Department of Pharmacy, National Yang Ming Chiao Tung University, Taipei, 11221, Taiwan.
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Hosoda K, Wanibuchi K, Amgalanbaatar A, Shoji M, Hayashi S, Shimomura H. A novel role of catalase in cholesterol uptake of Helicobacter pylori. Steroids 2023; 191:109158. [PMID: 36574870 DOI: 10.1016/j.steroids.2022.109158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/24/2022] [Accepted: 12/18/2022] [Indexed: 12/25/2022]
Abstract
Helicobacter pylori infection is known to be a significant risk factor for the development of gastric cancers in humans. This pathogen exhibits unique biological characteristics in membrane lipid composition. Specifically, H. pylori incorporates exogenous cholesterol into biomembranes and uses cholesterol as the membrane lipid constituents. A previous study by our group demonstrated that phosphatidylethanolamine of H. pylori functions as the cholesterol-binding lipid. It is, however, unclear whether H. pylori is equipped with protein molecules involved in the cholesterol uptake. We, therefore, examined H. pylori proteins that tightly bind to cholesterol. As a consequence, H. pylori catalase (KatA) turned out to be a candidate of the cholesterol uptake-associated protein. In addition, an H. pylori mutant strain that expresses KatA protein lacking catalase activity was significantly lower in total cholesterol contents than the wild-type H. pylori strain. The putative amino acid sequence of KatA found out to contain a number of the cholesterol recognition/interaction amino acid consensus sequence domains (CRAC and CARC domains). These results suggest that H. pylori KatA with normal folding conformation acts as the cholesterol-binding or -storage protein.
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Affiliation(s)
- Kouichi Hosoda
- Nikon Cell Innovation Co., Ltd., 2-4-10, Shinsuna, Koto-ku, Tokyo 136-0075, Japan
| | - Kiyofumi Wanibuchi
- Faculty of Pharmaceutical Sciences, Yokohama University of Pharmacy, 601, Matano-cho, Totsuka-ku, Yokohama-shi, Kanagawa 245-0066, Japan
| | - Avarzed Amgalanbaatar
- Department of Graduate Education, Graduate School, Mongolian National University of Medical Sciences, 14210, Zoing Street, Sukhbaatar District, Ulaanbaatar 14210, Mongolia
| | - Mitsuru Shoji
- Faculty of Pharmaceutical Sciences, Yokohama University of Pharmacy, 601, Matano-cho, Totsuka-ku, Yokohama-shi, Kanagawa 245-0066, Japan
| | - Shunji Hayashi
- Department of Microbiology, Kitasato University School of Medicine, 1-15-1, Kitasato, Minami-ku, Sagamihara-shi, Kanagawa 252-0374, Japan
| | - Hirofumi Shimomura
- Public Health Center of Uki, Kumamoto Prefecture Office, 400-1, Kugu, Matsubase-machi, Uki-shi, Kumamoto 869-0532, Japan.
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9
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Chang CC, Jan HM, Tseng CJ, Mondal S, Abera AB, Hsieh MY, Yang TC, Muthusamy S, Huang SC, Lin CH, Tony Mong KK. Metabolic Isolation, Stereochemical Determination, and Total Synthesis of Predominant Native Cholesteryl Phosphatidyl-α-glucoside from Carcinogenic Helicobacter pylori. Org Lett 2022; 24:5045-5050. [PMID: 35816729 DOI: 10.1021/acs.orglett.2c01815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report the isolation and stereochemical determination of the predominant native cholesteryl 6-O-phosphatidyl α-glucoside (CPG) from Helicobacter pylori via an integrated biological and chemical strategy. The strategy employed (i) the metabolic isolation of a CPG analogue and (ii) the enzymatic degradation of the analogue to obtain the native lactobacillic acid for the stereochemical determination. The absolute stereochemistry of the acid was found to be 11R and 12S. Using the new stereochemical data, we accomplished the total synthesis of predominant native CPG and other predominant αCG derivatives.
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Affiliation(s)
- Chia-Chen Chang
- Applied Chemistry Department, National Yang Ming Chiao Tung University, 1001 University Road, Hsinchu City 300093Taiwan, R.O.C
| | - Hau-Ming Jan
- Institute of Biological Chemistry, Academia Sinica, No.128 Academia Road Section 2, Nan-Kang, Taipei 11529, Taiwan
| | - Chieh-Jen Tseng
- Applied Chemistry Department, National Yang Ming Chiao Tung University, 1001 University Road, Hsinchu City 300093Taiwan, R.O.C
| | - Soumik Mondal
- Applied Chemistry Department, National Yang Ming Chiao Tung University, 1001 University Road, Hsinchu City 300093Taiwan, R.O.C
| | - Andualem Bahiru Abera
- Institute of Biological Chemistry, Academia Sinica, No.128 Academia Road Section 2, Nan-Kang, Taipei 11529, Taiwan.,Molecular and Biological Agricultural Sciences, Taiwan International Graduate Program, Academia Sinica, Taipei 11529, Taiwan.,Graduate Institute of Biotechnology and Biotechnology Center, National Chung-Hsing University, Taichung 40227, Taiwan
| | - Ming-Yen Hsieh
- Institute of Biological Chemistry, Academia Sinica, No.128 Academia Road Section 2, Nan-Kang, Taipei 11529, Taiwan
| | - Tsai-Chen Yang
- Institute of Biological Chemistry, Academia Sinica, No.128 Academia Road Section 2, Nan-Kang, Taipei 11529, Taiwan
| | - Sasikala Muthusamy
- Institute of Biological Chemistry, Academia Sinica, No.128 Academia Road Section 2, Nan-Kang, Taipei 11529, Taiwan.,Molecular and Biological Agricultural Sciences, Taiwan International Graduate Program, Academia Sinica, Taipei 11529, Taiwan.,Graduate Institute of Biotechnology and Biotechnology Center, National Chung-Hsing University, Taichung 40227, Taiwan
| | - Sheng-Cih Huang
- Applied Chemistry Department, National Yang Ming Chiao Tung University, 1001 University Road, Hsinchu City 300093Taiwan, R.O.C
| | - Chun-Hung Lin
- Institute of Biological Chemistry, Academia Sinica, No.128 Academia Road Section 2, Nan-Kang, Taipei 11529, Taiwan.,Molecular and Biological Agricultural Sciences, Taiwan International Graduate Program, Academia Sinica, Taipei 11529, Taiwan.,Graduate Institute of Biotechnology and Biotechnology Center, National Chung-Hsing University, Taichung 40227, Taiwan.,Department of Chemistry and Institute of Biochemical Sciences, National Taiwan University, Taipei 10617, Taiwan
| | - Kwok-Kong Tony Mong
- Applied Chemistry Department, National Yang Ming Chiao Tung University, 1001 University Road, Hsinchu City 300093Taiwan, R.O.C
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10
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Helicobacter pylori Pathogen-Associated Molecular Patterns: Friends or Foes? Int J Mol Sci 2022; 23:ijms23073531. [PMID: 35408892 PMCID: PMC8998707 DOI: 10.3390/ijms23073531] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Revised: 03/18/2022] [Accepted: 03/21/2022] [Indexed: 01/08/2023] Open
Abstract
Microbial infections are sensed by the host immune system by recognizing signature molecules called Pathogen-Associated Molecular Patterns—PAMPs. The binding of these biomolecules to innate immune receptors, called Pattern Recognition Receptors (PRRs), alerts the host cell, activating microbicidal and pro-inflammatory responses. The outcome of the inflammatory cascade depends on the subtle balance between the bacterial burn and the host immune response. The role of PRRs is to promote the clearance of the pathogen and to limit the infection by bumping inflammatory response. However, many bacteria, including Helicobacter pylori, evolved to escape PRRs’ recognition through different camouflages in their molecular pattern. This review examines all the different types of H. pylori PAMPs, their roles during the infection, and the mechanisms they evolved to escape the host recognition.
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11
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Morozumi S, Ueda M, Okahashi N, Arita M. Structures and functions of the gut microbial lipidome. Biochim Biophys Acta Mol Cell Biol Lipids 2022; 1867:159110. [PMID: 34995792 DOI: 10.1016/j.bbalip.2021.159110] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 12/19/2021] [Accepted: 12/24/2021] [Indexed: 12/26/2022]
Abstract
Microbial lipids provide signals that are responsible for maintaining host health and controlling disease. The differences in the structures of microbial lipids have been shown to alter receptor selectivity and agonist/antagonist activity. Advanced lipidomics is an emerging field that helps to elucidate the complex bacterial lipid diversity. The use of cutting-edge technologies is expected to lead to the discovery of new functional metabolites involved in host homeostasis. This review aims to describe recent updates on functional lipid metabolites derived from gut microbiota, their structure-activity relationships, and advanced lipidomics technologies.
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Affiliation(s)
- Satoshi Morozumi
- Laboratory for Metabolomics, RIKEN Center for Integrative Medical Sciences, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa 230-0045, Japan; Division of Physiological Chemistry and Metabolism, Graduate School of Pharmaceutical Sciences, Keio University, 1-5-30 Shibakoen, Minato-ku, Tokyo 105-8512, Japan
| | - Masahiro Ueda
- Laboratory for Metabolomics, RIKEN Center for Integrative Medical Sciences, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa 230-0045, Japan; JSR Bioscience and Informatics R&D Center, JSR Corporation, 3-103-9 Tonomachi, Kawasaki-ku, Kawasaki, Kanagawa 210-0821, Japan
| | - Nobuyuki Okahashi
- Laboratory for Metabolomics, RIKEN Center for Integrative Medical Sciences, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa 230-0045, Japan; Department of Bioinformatic Engineering, Graduate School of Information Science and Technology, Osaka University, 1-5 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Makoto Arita
- Laboratory for Metabolomics, RIKEN Center for Integrative Medical Sciences, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa 230-0045, Japan; Division of Physiological Chemistry and Metabolism, Graduate School of Pharmaceutical Sciences, Keio University, 1-5-30 Shibakoen, Minato-ku, Tokyo 105-8512, Japan; Cellular and Molecular Epigenetics Laboratory, Graduate School of Medical Life Science, Yokohama City University, 1-7-29 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa 230-0045, Japan.
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12
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Muthusamy S, Jan HM, Hsieh MY, Mondal S, Liu WC, Ko YA, Yang WY, Mong KKT, Chen GC, Lin CH. Enhanced enzymatic production of cholesteryl 6'-acylglucoside impairs lysosomal degradation for the intracellular survival of Helicobacter pylori. J Biomed Sci 2021; 28:72. [PMID: 34706729 PMCID: PMC8549234 DOI: 10.1186/s12929-021-00768-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Accepted: 10/08/2021] [Indexed: 01/15/2023] Open
Abstract
Background During autophagy defense against invading microbes, certain lipid types are indispensable for generating specialized membrane-bound organelles. The lipid composition of autophagosomes remains obscure, as does the issue of how specific lipids and lipid-associated enzymes participate in autophagosome formation and maturation. Helicobacter pylori is auxotrophic for cholesterol and converts cholesterol to cholesteryl glucoside derivatives, including cholesteryl 6ʹ-O-acyl-α-d-glucoside (CAG). We investigated how CAG and its biosynthetic acyltransferase assist H. pylori to escape host-cell autophagy. Methods We applied a metabolite-tagging method to obtain fluorophore-containing cholesteryl glucosides that were utilized to understand their intracellular locations. H. pylori 26695 and a cholesteryl glucosyltransferase (CGT)-deletion mutant (ΔCGT) were used as the standard strain and the negative control that contains no cholesterol-derived metabolites, respectively. Bacterial internalization and several autophagy-related assays were conducted to unravel the possible mechanism that H. pylori develops to hijack the host-cell autophagy response. Subcellular fractions of H. pylori-infected AGS cells were obtained and measured for the acyltransferase activity. Results The imaging studies of fluorophore-labeled cholesteryl glucosides pinpointed their intracellular localization in AGS cells. The result indicated that CAG enhances the internalization of H. pylori in AGS cells. Particularly, CAG, instead of CG and CPG, is able to augment the autophagy response induced by H. pylori. How CAG participates in the autophagy process is multifaceted. CAG was found to intervene in the degradation of autophagosomes and reduce lysosomal biogenesis, supporting the idea that intracellular H. pylori is harbored by autophago-lysosomes in favor of the bacterial survival. Furthermore, we performed the enzyme activity assay of subcellular fractions of H. pylori-infected AGS cells. The analysis showed that the acyltransferase is mainly distributed in autophago-lysosomal compartments. Conclusions Our results support the idea that the acyltransferase is mainly distributed in the subcellular compartment consisting of autophagosomes, late endosomes, and lysosomes, in which the acidic environment is beneficial for the maximal acyltransferase activity. The resulting elevated level of CAG can facilitate bacterial internalization, interfere with the autophagy flux, and causes reduced lysosomal biogenesis. Supplementary Information The online version contains supplementary material available at 10.1186/s12929-021-00768-w.
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Affiliation(s)
- Sasikala Muthusamy
- Institute of Biological Chemistry, Academia Sinica, No. 128 Academia Road Section 2, Nan-Kang, Taipei, 11529, Taiwan.,Molecular and Biological Agricultural Sciences Program, Taiwan International Graduate Program, National Chung-Hsing University and Academia Sinica, Taipei, 11529, Taiwan.,Graduate Institute of Biotechnology, National Chung-Hsing University, Taichung, 40227, Taiwan.,Biotechnology Center, National Chung-Hsing University, Taichung, 40227, Taiwan
| | - Hau-Ming Jan
- Institute of Biological Chemistry, Academia Sinica, No. 128 Academia Road Section 2, Nan-Kang, Taipei, 11529, Taiwan
| | - Ming-Yen Hsieh
- Institute of Biological Chemistry, Academia Sinica, No. 128 Academia Road Section 2, Nan-Kang, Taipei, 11529, Taiwan
| | - Soumik Mondal
- Department of Applied Chemistry, National Chiao Tung University, Hsin-Chu, 30010, Taiwan
| | - Wen-Chun Liu
- Biomedical Translation Research Center, Academia Sinica, Taipei, 11529, Taiwan
| | - Yi-An Ko
- Biomedical Translation Research Center, Academia Sinica, Taipei, 11529, Taiwan
| | - Wei-Yuan Yang
- Institute of Biological Chemistry, Academia Sinica, No. 128 Academia Road Section 2, Nan-Kang, Taipei, 11529, Taiwan.,Institute of Biochemical Sciences, National Taiwan University, Taipei, 10617, Taiwan
| | - Kwok-Kong Tony Mong
- Department of Applied Chemistry, National Chiao Tung University, Hsin-Chu, 30010, Taiwan
| | - Guang-Chao Chen
- Institute of Biological Chemistry, Academia Sinica, No. 128 Academia Road Section 2, Nan-Kang, Taipei, 11529, Taiwan.,Institute of Biochemical Sciences, National Taiwan University, Taipei, 10617, Taiwan
| | - Chun-Hung Lin
- Institute of Biological Chemistry, Academia Sinica, No. 128 Academia Road Section 2, Nan-Kang, Taipei, 11529, Taiwan. .,Molecular and Biological Agricultural Sciences Program, Taiwan International Graduate Program, National Chung-Hsing University and Academia Sinica, Taipei, 11529, Taiwan. .,Graduate Institute of Biotechnology, National Chung-Hsing University, Taichung, 40227, Taiwan. .,Biotechnology Center, National Chung-Hsing University, Taichung, 40227, Taiwan. .,Institute of Biochemical Sciences, National Taiwan University, Taipei, 10617, Taiwan. .,Department of Chemistry, National Taiwan University, Taipei, 10617, Taiwan.
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13
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Nagata M, Toyonaga K, Ishikawa E, Haji S, Okahashi N, Takahashi M, Izumi Y, Imamura A, Takato K, Ishida H, Nagai S, Illarionov P, Stocker BL, Timmer MSM, Smith DGM, Williams SJ, Bamba T, Miyamoto T, Arita M, Appelmelk BJ, Yamasaki S. Helicobacter pylori metabolites exacerbate gastritis through C-type lectin receptors. J Exp Med 2021; 218:152132. [PMID: 32991669 PMCID: PMC7527975 DOI: 10.1084/jem.20200815] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Revised: 07/17/2020] [Accepted: 08/18/2020] [Indexed: 12/13/2022] Open
Abstract
Helicobacter pylori causes gastritis, which has been attributed to the development of H. pylori-specific T cells during infection. However, the mechanism underlying innate immune detection leading to the priming of T cells is not fully understood, as H. pylori evades TLR detection. Here, we report that H. pylori metabolites modified from host cholesterol exacerbate gastritis through the interaction with C-type lectin receptors. Cholesteryl acyl α-glucoside (αCAG) and cholesteryl phosphatidyl α-glucoside (αCPG) were identified as noncanonical ligands for Mincle (Clec4e) and DCAR (Clec4b1). During chronic infection, H. pylori-specific T cell responses and gastritis were ameliorated in Mincle-deficient mice, although bacterial burdens remained unchanged. Furthermore, a mutant H. pylori strain lacking αCAG and αCPG exhibited an impaired ability to cause gastritis. Thus H. pylori-specific modification of host cholesterol plays a pathophysiological role that exacerbates gastric inflammation by triggering C-type lectin receptors.
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Affiliation(s)
- Masahiro Nagata
- Department of Molecular Immunology, Research Institute for Microbial Diseases, Osaka University, Suita, Osaka, Japan
| | - Kenji Toyonaga
- Department of Molecular Immunology, Research Institute for Microbial Diseases, Osaka University, Suita, Osaka, Japan
| | - Eri Ishikawa
- Department of Molecular Immunology, Research Institute for Microbial Diseases, Osaka University, Suita, Osaka, Japan.,Laboratory of Molecular Immunology, Immunology Frontier Research Center, Osaka University, Suita, Osaka, Japan
| | - Shojiro Haji
- Department of Molecular Immunology, Research Institute for Microbial Diseases, Osaka University, Suita, Osaka, Japan.,Department of Medicine and Bioregulatory Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Fukuoka, Japan
| | - Nobuyuki Okahashi
- Department of Bioinformatics Engineering, Graduate School of Information Science and Technology, Osaka University, Suita, Osaka, Japan.,Laboratory for Metabolomics, RIKEN Center for Integrative Medical Sciences, Yokohama, Kanagawa, Japan
| | - Masatomo Takahashi
- Division of Metabolomics, Medical Institute of Bioregulation, Kyushu University, Fukuoka, Fukuoka, Japan
| | - Yoshihiro Izumi
- Division of Metabolomics, Medical Institute of Bioregulation, Kyushu University, Fukuoka, Fukuoka, Japan
| | - Akihiro Imamura
- Department of Applied Bioorganic Chemistry, Gifu University, Gifu, Gifu, Japan
| | - Koichi Takato
- Department of Applied Bioorganic Chemistry, Gifu University, Gifu, Gifu, Japan
| | - Hideharu Ishida
- Department of Applied Bioorganic Chemistry, Gifu University, Gifu, Gifu, Japan.,Center for Highly Advanced Integration of Nano and Life Sciences (G-CHAIN), Gifu University, Gifu, Gifu, Japan
| | - Shigenori Nagai
- Department of Molecular Immunology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, Japan
| | - Petr Illarionov
- School of Biosciences, University of Birmingham, Birmingham, UK
| | - Bridget L Stocker
- School of Chemical and Physical Sciences, Victoria University of Wellington, Wellington, New Zealand.,Centre for Biodiscovery, Victoria University of Wellington, Wellington, New Zealand.,Maurice Wilkins Centre for Molecular Biodiscovery, University of Auckland, Auckland, New Zealand
| | - Mattie S M Timmer
- School of Chemical and Physical Sciences, Victoria University of Wellington, Wellington, New Zealand.,Centre for Biodiscovery, Victoria University of Wellington, Wellington, New Zealand.,Maurice Wilkins Centre for Molecular Biodiscovery, University of Auckland, Auckland, New Zealand
| | - Dylan G M Smith
- School of Chemistry and Bio21 Institute of Molecular Science and Biotechnology, University of Melbourne, Parkville, Victoria, Australia
| | - Spencer J Williams
- School of Chemistry and Bio21 Institute of Molecular Science and Biotechnology, University of Melbourne, Parkville, Victoria, Australia
| | - Takeshi Bamba
- Division of Metabolomics, Medical Institute of Bioregulation, Kyushu University, Fukuoka, Fukuoka, Japan
| | - Tomofumi Miyamoto
- Department of Natural Products Chemistry, Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka, Fukuoka, Japan
| | - Makoto Arita
- Laboratory for Metabolomics, RIKEN Center for Integrative Medical Sciences, Yokohama, Kanagawa, Japan.,Cellular and Molecular Epigenetics Laboratory, Graduate School of Medical Life Science, Yokohama City University, Yokohama, Kanagawa, Japan.,Division of Physiological Chemistry and Metabolism, Graduate School of Pharmaceutical Sciences, Keio University, Minato-ku, Tokyo, Japan
| | - Ben J Appelmelk
- Molecular Microbiology/Medical Microbiology and Infection Control, Amsterdam University Medical Centers, Amsterdam, Netherlands
| | - Sho Yamasaki
- Department of Molecular Immunology, Research Institute for Microbial Diseases, Osaka University, Suita, Osaka, Japan.,Laboratory of Molecular Immunology, Immunology Frontier Research Center, Osaka University, Suita, Osaka, Japan.,Division of Molecular Design, Medical Institute of Bioregulation, Kyushu University, Fukuoka, Fukuoka, Japan.,Division of Molecular Immunology, Medical Mycology Research Center, Chiba University, Chiba, Japan
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14
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Timmer MSM, Teunissen TJ, Kodar K, Foster AJ, Yamasaki S, Stocker BL. Cholesteryl glucosides signal through the carbohydrate recognition domain of the macrophage inducible C-type lectin (mincle). Org Biomol Chem 2021; 19:2198-2202. [PMID: 33625427 DOI: 10.1039/d0ob02342f] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Cholesteryl α-d-glucosides (αGCs) are unique metabolic products of the cancer-causing human pathogen Helicobacter pylori. Via signalling through the Macrophage inducible C-type lectin (Mincle) and the induction of a pro-inflammatory response, they are thought to play a role in the development of gastric atrophy. Herein, we prepared the first library of steryl d-glucosides and determined that they preferentially signal through the carbohydrate recognition domain of human Mincle, rather than the amino acid consensus motif. Lipidated steryl d-glucosides exhibited enhanced Mincle agonist activity, with C18 cholesteryl 6-O-acyl-α-d-glucoside (2c) being the most potent activator of human monocytes. Despite exhibiting strong Mincle signalling, sito- (5b) and stigmasterol glycosides (6b) led to a poor inflammatory response in primary cells, suggesting that Mincle is a potential therapeutic target for preventing H. pylori-mediated inflammation and cancer.
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Affiliation(s)
- Mattie S M Timmer
- School of Chemical and Physical Sciences, Victoria University of Wellington, PO Box 600, Wellington, New Zealand.
| | - Thomas J Teunissen
- School of Chemical and Physical Sciences, Victoria University of Wellington, PO Box 600, Wellington, New Zealand.
| | - Kristel Kodar
- School of Chemical and Physical Sciences, Victoria University of Wellington, PO Box 600, Wellington, New Zealand.
| | - Amy J Foster
- School of Chemical and Physical Sciences, Victoria University of Wellington, PO Box 600, Wellington, New Zealand.
| | - Sho Yamasaki
- Department of Molecular Immunology, Research Institute for Microbial Diseases, Osaka University, Suita, Osaka 565-0871, Japan and Laboratory of Molecular Immunology, Immunology Frontier Research Center (IFReC), Osaka University, Suita, Osaka 565-0871, Japan and Division of Molecular Design, Medical Institute of Bioregulation, Kyushu University, Fukuoka, Fukuoka 812-8582, Japan and Division of Molecular Immunology, Medical Mycology Research Center, Chiba University, Chiba 260-8673, Japan
| | - Bridget L Stocker
- School of Chemical and Physical Sciences, Victoria University of Wellington, PO Box 600, Wellington, New Zealand.
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15
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Agrahari AK, Bose P, Jaiswal MK, Rajkhowa S, Singh AS, Hotha S, Mishra N, Tiwari VK. Cu(I)-Catalyzed Click Chemistry in Glycoscience and Their Diverse Applications. Chem Rev 2021; 121:7638-7956. [PMID: 34165284 DOI: 10.1021/acs.chemrev.0c00920] [Citation(s) in RCA: 154] [Impact Index Per Article: 51.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Copper(I)-catalyzed 1,3-dipolar cycloaddition between organic azides and terminal alkynes, commonly known as CuAAC or click chemistry, has been identified as one of the most successful, versatile, reliable, and modular strategies for the rapid and regioselective construction of 1,4-disubstituted 1,2,3-triazoles as diversely functionalized molecules. Carbohydrates, an integral part of living cells, have several fascinating features, including their structural diversity, biocompatibility, bioavailability, hydrophilicity, and superior ADME properties with minimal toxicity, which support increased demand to explore them as versatile scaffolds for easy access to diverse glycohybrids and well-defined glycoconjugates for complete chemical, biochemical, and pharmacological investigations. This review highlights the successful development of CuAAC or click chemistry in emerging areas of glycoscience, including the synthesis of triazole appended carbohydrate-containing molecular architectures (mainly glycohybrids, glycoconjugates, glycopolymers, glycopeptides, glycoproteins, glycolipids, glycoclusters, and glycodendrimers through regioselective triazole forming modular and bio-orthogonal coupling protocols). It discusses the widespread applications of these glycoproducts as enzyme inhibitors in drug discovery and development, sensing, gelation, chelation, glycosylation, and catalysis. This review also covers the impact of click chemistry and provides future perspectives on its role in various emerging disciplines of science and technology.
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Affiliation(s)
- Anand K Agrahari
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, Uttar Pradesh 221005, India
| | - Priyanka Bose
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, Uttar Pradesh 221005, India
| | - Manoj K Jaiswal
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, Uttar Pradesh 221005, India
| | - Sanchayita Rajkhowa
- Department of Chemistry, Jorhat Institute of Science and Technology (JIST), Jorhat, Assam 785010, India
| | - Anoop S Singh
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, Uttar Pradesh 221005, India
| | - Srinivas Hotha
- Department of Chemistry, Indian Institute of Science and Engineering Research (IISER), Pune, Maharashtra 411021, India
| | - Nidhi Mishra
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, Uttar Pradesh 221005, India
| | - Vinod K Tiwari
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, Uttar Pradesh 221005, India
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16
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Chen SP, Chen EHL, Yang SY, Kuo PS, Jan HM, Yang TC, Hsieh MY, Lee KT, Lin CH, Chen RPY. A Systematic Study of the Stability, Safety, and Efficacy of the de novo Designed Antimicrobial Peptide PepD2 and Its Modified Derivatives Against Acinetobacter baumannii. Front Microbiol 2021; 12:678330. [PMID: 34220763 PMCID: PMC8250858 DOI: 10.3389/fmicb.2021.678330] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Accepted: 05/27/2021] [Indexed: 12/12/2022] Open
Abstract
Searching for new antimicrobials is a pressing issue to conquer the emergence of multidrug-resistant (MDR) bacteria and fungi. Antimicrobial peptides (AMPs) usually have antimicrobial mechanisms different from those of traditional antibiotics and bring new hope in the discovery of new antimicrobials. In addition to antimicrobial activity, stability and target selectivity are important concerns to decide whether an antimicrobial peptide can be applied in vivo. Here, we used a simple de novo designed peptide, pepD2, which contains only three kinds of amino acid residues (W, K, L), as an example to evaluate how the residues and modifications affect the antimicrobial activity against Acinetobacter baumannii, stability in plasma, and toxicity to human HEK293 cells. We found that pepI2 with a Leu→Ile substitution can decrease the minimum bactericidal concentrations (MBC) against A. baumannii by one half (4 μg/mL). A D-form peptide, pepdD2, in which the D-enantiomers replaced the L-enantiomers of the Lys(K) and Leu(L) residues, extended the peptide half-life in plasma by more than 12-fold. PepD3 is 3-residue shorter than pepD2. Decreasing peptide length did not affect antimicrobial activity but increased the IC50 to HEK293 cells, thus increased the selectivity index (SI) between A. baumannii and HEK293 cells from 4.7 to 8.5. The chain length increase of the N-terminal acyl group and the Lys→Arg substitution greatly enhanced the hemolytic activity, hence those modifications are not good for clinical application. Unlike colistin, the action mechanism of our peptides relies on negatively charged lipids rather than lipopolysaccharides. Therefore, not only gram-negative bacteria but also gram-positive bacteria can be killed by our peptides.
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Affiliation(s)
- Sung-Pang Chen
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan.,Institute of Biochemical Sciences, National Taiwan University, Taipei, Taiwan
| | - Eric H-L Chen
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan
| | - Sheng-Yung Yang
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan
| | - Pin-Shin Kuo
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan.,Institute of Biochemical Sciences, National Taiwan University, Taipei, Taiwan
| | - Hau-Ming Jan
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan
| | - Tsai-Chen Yang
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan
| | - Ming-Yen Hsieh
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan
| | - Kung-Ta Lee
- Department of Biochemical Science and Technology, National Taiwan University, Taipei, Taiwan
| | - Chun-Hung Lin
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan.,Institute of Biochemical Sciences, National Taiwan University, Taipei, Taiwan
| | - Rita P-Y Chen
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan.,Institute of Biochemical Sciences, National Taiwan University, Taipei, Taiwan
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17
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A short review, effect of dimethyl-β-cyclodextrin on the interaction between Helicobacter pylori and steroidal compounds. Heliyon 2021; 7:e06767. [PMID: 33912723 PMCID: PMC8065201 DOI: 10.1016/j.heliyon.2021.e06767] [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: 02/02/2021] [Revised: 03/08/2021] [Accepted: 04/08/2021] [Indexed: 01/22/2023] Open
Abstract
The 2,6-di-O-methyl-β-cyclodextrin (dMβCD) is an amphiphilic annular compound consisting of seven dimethyl-glucose molecules. This compound is well known as a solubilizer of lipophilic compounds. Especially, dMβCD extracts cholesterol from the plasma membrane of mammalian cells and releases the cholesterol to the aqueous solution. The experimental use of dMβCD, therefore, serves to investigate the role of cholesterol in the mammalian cell membrane. It is, however, unclear as to how dMβCD extracts cholesterol incorporated into the glycerophospholipid biomembrane. Meanwhile, dMβCD acts as a beneficial compound for Helicobacter pylori and is used as the standard component for supporting the growth of this bacterium in the serum-free culture. However, the detailed mechanism of dMβCD for supporting the growth of H. pylori is still to be clarified. H. pylori is a Gram-negative microaerophilic bacillus recognized as a pathogen concerned with gastrointestinal diseases in human. Previous studies by our group have successfully obtained the H. pylori strains culturable without dMβCD and demonstrated the distinct effects of dMβCD on the interaction between H. pylori and exogenous steroidal compounds. For instance, dMβCD promotes and inhibits the absorption of cholesterol and several steroidal compounds respectively into the biomembranes of H. pylori. In this study we summarized behaviors of dMβCD toward steroidal compounds relevant to H. pylori.
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18
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Qaria MA, Qumar S, Sepe LP, Ahmed N. Cholesterol glucosylation-based survival strategy in Helicobacter pylori. Helicobacter 2021; 26:e12777. [PMID: 33368895 DOI: 10.1111/hel.12777] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Revised: 11/09/2020] [Accepted: 11/12/2020] [Indexed: 12/14/2022]
Abstract
Helicobacter pylori is a major chronic health problem, infecting more than half of the population worldwide. H. pylori infection is linked with various clinical complications ranging from gastritis to gastric cancer. The resolution of gastritis and peptic ulcer appears to be linked with the eradication of H. pylori. However, resistance to antibiotics and eradication failure rates are reaching alarmingly high levels. This calls for urgent action in finding alternate methods for H. pylori eradication. Here, we discuss the recently identified mechanism of H. pylori known as cholesterol glucosylation, mediated by the enzyme cholesterol-α-glucosyltransferase, encoded by the gene cgt. Cholesterol glucosylation serves several functions that include promoting immune evasion, enhancing antibiotic resistance, maintaining the native helical morphology, and supporting functions of prominent virulence factors such as CagA and VacA. Consequently, strategies aiming at inhibition of the cholesterol glucosylation process have the potential to attenuate the potency of H. pylori infection and abrogate H. pylori immune evasion capabilities. Knockout of H. pylori cgt results in unsuccessful colonization and elimination by the host immune responses. Moreover, blocking cholesterol glucosylation can reverse antibiotic susceptibility in H. pylori. In this work, we review the main roles of cholesterol glucosylation in H. pylori and evaluate whether this mechanism can be targeted for the development of alternate methods for eradication of H. pylori infection.
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Affiliation(s)
- Majjid A Qaria
- Pathogen Biology Laboratory, Department of Biotechnology and Bioinformatics, University of Hyderabad, Hyderabad, India
| | - Shamsul Qumar
- Pathogen Biology Laboratory, Department of Biotechnology and Bioinformatics, University of Hyderabad, Hyderabad, India
| | - Ludovico P Sepe
- Department of Biological Safety, German Federal Institute for Risk Assessment (BfR), Berlin, Germany
| | - Niyaz Ahmed
- Pathogen Biology Laboratory, Department of Biotechnology and Bioinformatics, University of Hyderabad, Hyderabad, India
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19
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Smith DGM, Ito E, Yamasaki S, Williams SJ. Cholesteryl 6- O-acyl-α-glucosides from diverse Helicobacter spp. signal through the C-type lectin receptor Mincle. Org Biomol Chem 2020; 18:7907-7915. [PMID: 32996960 DOI: 10.1039/d0ob01776k] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Helicobacter spp. are Gram-negative bacteria that cause a spectrum of disease in the gut, biliary tree and liver. Many Helicobacter spp. produce a range of cholesteryl α-glucosides that have the potential to act as pathogen associated molecular patterns. We report a highly stereoselective α-glucosylation of cholesterol using 3,4,6-tri-O-acetyl-2-O-benzyl-d-glucopyranosyl N-phenyl-2,2,2-trifluoroacetimidate, which allowed the synthesis of cholesteryl α-glucoside (αCG) and representative Helicobacter spp. cholesteryl 6-O-acyl-α-glucosides (αCAGs; acyl = C12:0, 14:0, C16:0, C18:0, C18:1). All αCAGs, irrespective of the nature of their acyl chain composition, strongly agonised signalling through the C-type lectin receptor Mincle from human and mouse to similar degrees. By contrast, αCG only weakly signalled through human Mincle, and did not signal through mouse Mincle. These results provide a molecular basis for understanding of the immunobiology of non-pylori Helicobacter infections in humans and other animals.
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Affiliation(s)
- Dylan G M Smith
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, Parkville, Victoria 3010, Australia.
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20
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Unique responses of Helicobacter pylori to exogenous hydrophobic compounds. Chem Phys Lipids 2020; 229:104908. [PMID: 32259519 DOI: 10.1016/j.chemphyslip.2020.104908] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Revised: 03/14/2020] [Accepted: 03/17/2020] [Indexed: 02/08/2023]
Abstract
Helicobacter pylori is a pathogen responsible for peptic ulcers and gastric cancers in human. One of the unique biological features of this bacterium is a membrane lipid composition significantly differed from that of typical Gram-negative bacteria. Due to its unique lipid composition, the responses of H. pylori to various exogenous lipophilic compounds significantly differ from the responses of typical Gram-negative bacteria to the same lipophilic compounds. For instance, some steroidal compounds are incorporated into the biomembranes of H. pylori through the intermediation of the myristoyl-phosphatidylethanolamine (PE). In addition, H. pylori shows high susceptibility to bacteriolytic action of lipids such as 3-carbonyl steroids, vitamin D, and indene compounds. These lipids are also considered to interact with myristoyl-PE of H. pylori membranes, and to ultimately confer the bactericidal action to this bacterium. In this study we summarize the lipids concerned with H. pylori and suggest the possibility of the development of chemotherapeutic medicines that act on the membrane lipid component of H. pylori.
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21
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Jan HM, Chen YC, Yang TC, Ong LL, Chang CC, Muthusamy S, Abera AB, Wu MS, Gervay-Hague J, Mong KKT, Lin CH. Cholesteryl α-D-glucoside 6-acyltransferase enhances the adhesion of Helicobacter pylori to gastric epithelium. Commun Biol 2020; 3:120. [PMID: 32170208 PMCID: PMC7069968 DOI: 10.1038/s42003-020-0855-y] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Accepted: 02/20/2020] [Indexed: 12/18/2022] Open
Abstract
Helicobacter pylori, the most common etiologic agent of gastric diseases including gastric cancer, is auxotrophic for cholesterol and has to hijack it from gastric epithelia. Upon uptake, the bacteria convert cholesterol to cholesteryl 6′-O-acyl-α-D-glucopyranoside (CAG) to promote lipid raft clustering in the host cell membranes. However, how CAG appears in the host to exert the pathogenesis still remains ambiguous. Herein we identified hp0499 to be the gene of cholesteryl α-D-glucopyranoside acyltransferase (CGAT). Together with cholesteryl glucosyltransferase (catalyzing the prior step), CGAT is secreted via outer membrane vesicles to the host cells for direct synthesis of CAG. This significantly enhances lipid rafts clustering, gathers adhesion molecules (including Lewis antigens and integrins α5, β1), and promotes more bacterial adhesion. Furthermore, the clinically used drug amiodarone was shown as a potent inhibitor of CGAT to effectively reduce the bacterial adhesion, indicating that CGAT is a potential target of therapeutic intervention. Jan et al. identify cholesteryl α-D- glucopyranoside acyltransferase as a key enzyme in Helicobacter pylori’s synthesis of cholesteryl 6’-O-acyl-α-D-glucopyranoside, which promotes bacterial adhesion. This study provides insights into the H. pylori-induced pathogenesis and therapeutic strategies against it.
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Affiliation(s)
- Hau-Ming Jan
- Institute of Biological Chemistry, Academia Sinica, No. 128 Academic Road Section 2, Nan-Kang, Taipei, 11529, Taiwan
| | - Yi-Chi Chen
- Institute of Biological Chemistry, Academia Sinica, No. 128 Academic Road Section 2, Nan-Kang, Taipei, 11529, Taiwan.,Department of Chemistry and Institute of Biochemical Sciences, National Taiwan University, Taipei, 10617, Taiwan
| | - Tsai-Chen Yang
- Institute of Biological Chemistry, Academia Sinica, No. 128 Academic Road Section 2, Nan-Kang, Taipei, 11529, Taiwan
| | - Lih-Lih Ong
- Institute of Biological Chemistry, Academia Sinica, No. 128 Academic Road Section 2, Nan-Kang, Taipei, 11529, Taiwan.,Department of Applied Chemistry, National Chiao Tung University, Hsin-Chu, 30010, Taiwan.,Sustainable Chemical Science and Technology, Taiwan International Graduate Program, Academia Sinica and National Chiao Tung University, Taipei, 11529, Taiwan
| | - Chia-Chen Chang
- Department of Applied Chemistry, National Chiao Tung University, Hsin-Chu, 30010, Taiwan
| | - Sasikala Muthusamy
- Institute of Biological Chemistry, Academia Sinica, No. 128 Academic Road Section 2, Nan-Kang, Taipei, 11529, Taiwan.,Molecular and Biological Agricultural Sciences, Taiwan International Graduate Program, Academia Sinica and National Chung-Hsing University, Taipei, 11529, Taiwan.,Graduate Institute of Biotechnology, National Chung-Hsing University, Taichung, 40227, Taiwan
| | - Andualem Bahiru Abera
- Institute of Biological Chemistry, Academia Sinica, No. 128 Academic Road Section 2, Nan-Kang, Taipei, 11529, Taiwan.,Molecular and Biological Agricultural Sciences, Taiwan International Graduate Program, Academia Sinica and National Chung-Hsing University, Taipei, 11529, Taiwan.,Graduate Institute of Biotechnology, National Chung-Hsing University, Taichung, 40227, Taiwan
| | - Ming-Shiang Wu
- Division of Gastroenterology, Department of Internal Medicine, National Taiwan University Hospital, Taipei, 10002, Taiwan
| | | | - Kwok-Kong Tony Mong
- Department of Applied Chemistry, National Chiao Tung University, Hsin-Chu, 30010, Taiwan.
| | - Chun-Hung Lin
- Institute of Biological Chemistry, Academia Sinica, No. 128 Academic Road Section 2, Nan-Kang, Taipei, 11529, Taiwan. .,Department of Chemistry and Institute of Biochemical Sciences, National Taiwan University, Taipei, 10617, Taiwan.
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22
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Wanibuchi K, Takezawa M, Hosoda K, Amgalanbaatar A, Tajiri K, Koizumi Y, Niitsu S, Masui H, Sakai Y, Shoji M, Takahashi T, Hirai Y, Shimomura H. Antibacterial effect of indene on Helicobacter pylori correlates with specific interaction between its compound and dimyristoyl-phosphatidylethanolamine. Chem Phys Lipids 2020; 227:104871. [PMID: 31923389 DOI: 10.1016/j.chemphyslip.2020.104871] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Revised: 01/01/2020] [Accepted: 01/05/2020] [Indexed: 01/07/2023]
Abstract
Recent studies by our group have suggested that the vitamin D3 decomposition product VDP1 [(1R,3aR,7aR)-1-[(1R)-1,5-dimethylhexyl]octahydro-7a-methyl-4H-inden-4-one] confers the potent bactericidal action to Helicobacter pylori by targeting the membranal dimyristoyl-phosphatidylethanolamine (di-14:0 PE). In this study we synthesized a new VDP1 derivative to advance further investigation as for the correlative relationship between VDP1 structure and anti-H. pylori activity or PE vesicle collapse induction activity. The derivative VD3-7 [(1R,7aR)-4-fluoro-7a-methyl-1-((R)-6-methylheptan-2-yl)octahydro-1H-indene] retained a fluorine atom in place of the oxygen atom of VDP1. The fluorination of the carbonyl portion of VDP1 forfeited the effective anti-H. pylori activity. We, therefore, prepared Coomassie brilliant blue (CBB)-containing unilamellar vesicles consisting of various PE molecular species, and examined the vesicle collapse induction activity of either VDP1 or VD3-7 by detecting the CBB eluted from the PE unilamellar vesicles. VDP1 strongly induced CBB elution from the unilamellar vesicles of rectus-PE retaining the same two fatty acid side-chains shorter than carbon numbers 14, indicating that VDP1 specifically disrupted the vesicular conformation of those PE unilamellar vesicles. Meanwhile, VD3-7 had no influence on the structural stability of any PE unilamellar vesicles. This study obtained additional evidence that VDP1 acts as a bactericidal agent on H. pylori by targeting the membranal di-14:0 PE.
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Affiliation(s)
- Kiyofumi Wanibuchi
- Faculty of Pharmaceutical Sciences, Yokohama University of Pharmacy, 601, Matano-cho, Totsuka-ku, Yokohama-shi, Kanagawa, 245-0066, Japan
| | - Motoki Takezawa
- Faculty of Pharmaceutical Sciences, Yokohama University of Pharmacy, 601, Matano-cho, Totsuka-ku, Yokohama-shi, Kanagawa, 245-0066, Japan
| | - Kouichi Hosoda
- Nikon Cell Innovation Co., Ltd., 2-4-10, Shinsuna, Koto-ku, Tokyo, 136-0075, Japan
| | - Avarzed Amgalanbaatar
- Department of Microbiology and Immunology, School of Bio-medicine, Mongolian National University of Medical Sciences, 14210, Zoing street, Sukhbaatar district, Ulaanbaatar, 14210, Mongolia
| | - Kentaro Tajiri
- Faculty of Pharmaceutical Sciences, Yokohama University of Pharmacy, 601, Matano-cho, Totsuka-ku, Yokohama-shi, Kanagawa, 245-0066, Japan
| | - Yuki Koizumi
- Faculty of Pharmaceutical Sciences, Yokohama University of Pharmacy, 601, Matano-cho, Totsuka-ku, Yokohama-shi, Kanagawa, 245-0066, Japan
| | - Sakura Niitsu
- Faculty of Pharmaceutical Sciences, Yokohama University of Pharmacy, 601, Matano-cho, Totsuka-ku, Yokohama-shi, Kanagawa, 245-0066, Japan
| | - Hisashi Masui
- Faculty of Pharmaceutical Sciences, Yokohama University of Pharmacy, 601, Matano-cho, Totsuka-ku, Yokohama-shi, Kanagawa, 245-0066, Japan
| | - Yuki Sakai
- Faculty of Pharmaceutical Sciences, Yokohama University of Pharmacy, 601, Matano-cho, Totsuka-ku, Yokohama-shi, Kanagawa, 245-0066, Japan
| | - Mitsuru Shoji
- Faculty of Pharmaceutical Sciences, Yokohama University of Pharmacy, 601, Matano-cho, Totsuka-ku, Yokohama-shi, Kanagawa, 245-0066, Japan
| | - Takashi Takahashi
- Faculty of Pharmaceutical Sciences, Yokohama University of Pharmacy, 601, Matano-cho, Totsuka-ku, Yokohama-shi, Kanagawa, 245-0066, Japan
| | - Yoshikazu Hirai
- Tamano Institute of Health and Human Services, 1-1-20, Chikko, Tamano-shi, Okayama, 760-0002, Japan
| | - Hirofumi Shimomura
- Big Bear Veterinary Hospital, 3-1-5, Oyama, Higashi-ku, Kumamoto-shi, Kumamoto, 861-8045, Japan.
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23
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Step-economy synthesis of β-steryl sialosides using a sialyl iodide donor. J Antibiot (Tokyo) 2019; 72:449-460. [PMID: 30886347 DOI: 10.1038/s41429-019-0165-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Revised: 02/12/2019] [Accepted: 02/15/2019] [Indexed: 11/08/2022]
Abstract
Steryl glycosides are prevalent in nature and have unique biological activities dictated by sterol structure, sugar composition, and the stereochemical attachment of the aglycone. A single configurational switch can have profound biological consequences meriting the systematic study of structure and function relationships. Steryl congeners of N-acetyl neuraminic acid (NANA) impact neurobiological processes and may also mediate host/microbe interactions. In order to study these processes, a platform for the synthesis of β-steryl sialosides has been established. Promoter-free glycosidations using a novel α-linked sialyl iodide donor efficiently provide unique amphiphilic sialoglycoconjugates for examining bioactivities in various systems.
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