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Eltokhy MA, Saad BT, Eltayeb WN, Alshahrani MY, Radwan SMR, Aboshanab KM, Ashour MSE. Metagenomic nanopore sequencing for exploring the nature of antimicrobial metabolites of Bacillus haynesii. AMB Express 2024; 14:52. [PMID: 38704474 PMCID: PMC11069495 DOI: 10.1186/s13568-024-01701-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Accepted: 04/08/2024] [Indexed: 05/06/2024] Open
Abstract
Multidrug-resistant (MDR) pathogens are a rising global health worry that imposes an urgent need for the discovery of novel antibiotics particularly those of natural origin. In this context, we aimed to use the metagenomic nanopore sequence analysis of soil microbiota coupled with the conventional phenotypic screening and genomic analysis for identifying the antimicrobial metabolites produced by promising soil isolate(s). In this study, whole metagenome analysis of the soil sample(s) was performed using MinION™ (Oxford Nanopore Technologies). Aligning and analysis of sequences for probable secondary metabolite gene clusters were extracted and analyzed using the antiSMASH version 2 and DeepBGC. Results of the metagenomic analysis showed the most abundant taxa were Bifidobacterium, Burkholderia, and Nocardiaceae (99.21%, followed by Sphingomonadaceae (82.03%) and B. haynesii (34%). Phenotypic screening of the respective soil samples has resulted in a promising Bacillus isolate that exhibited broad-spectrum antibacterial activities against various MDR pathogens. It was identified using microscopical, cultural, and molecular methods as Bacillus (B.) haynesii isolate MZ922052. The secondary metabolite gene analysis revealed the conservation of seven biosynthetic gene clusters of antibacterial metabolites namely, siderophore lichenicidin VK21-A1/A2 (95% identity), lichenysin (100%), fengycin (53%), terpenes (100%), bacteriocin (100%), Lasso peptide (95%) and bacillibactin (53%). In conclusion, metagenomic nanopore sequence analysis of soil samples coupled with conventional screening helped identify B. haynesii isolate MZ922052 harboring seven biosynthetic gene clusters of promising antimicrobial metabolites. This is the first report for identifying the bacteriocin, lichenysin, and fengycin biosynthetic gene clusters in B. haynesii MZ922052.
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Affiliation(s)
- Mohamed A Eltokhy
- Department of Microbiology, Faculty of Pharmacy, Misr International University (MIU), Cairo, 19648, Egypt
| | - Bishoy T Saad
- Department of Bioinformatics, HITS Solutions Co., Cairo, 11765, Egypt
| | - Wafaa N Eltayeb
- Department of Microbiology, Faculty of Pharmacy, Misr International University (MIU), Cairo, 19648, Egypt
| | - Mohammad Y Alshahrani
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, King Khalid University, P.O. Box 61413, Abha, 9088, Saudi Arabia
| | - Sahar M R Radwan
- Department of Microbiology and Immunology, Faculty of Pharmacy, Al-Azhar University (Girls), Organization of African Unity St., Cairo, 11651, Egypt
| | - Khaled M Aboshanab
- Department of Microbiology and Immunology, Faculty of Pharmacy, Organization of African Unity St, Ain Shams University, Organization of African Unity St., Cairo, 11566, Egypt.
| | - Mohamed S E Ashour
- Department of Microbiology and Immunology, Faculty of Pharmacy, Al-Azhar University (Boys), Cairo, 11651, Egypt
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Li J, Sun Y, Li G, Cheng C, Sui X, Wu Q. The Extraction, Determination, and Bioactivity of Curcumenol: A Comprehensive Review. Molecules 2024; 29:656. [PMID: 38338400 PMCID: PMC10856406 DOI: 10.3390/molecules29030656] [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: 12/27/2023] [Revised: 01/18/2024] [Accepted: 01/26/2024] [Indexed: 02/12/2024] Open
Abstract
Curcuma wenyujin is a member of the Curcuma zedoaria (zedoary, Zingiberaceae) family, which has a long history in traditional Chinese medicine (TCM) due to its abundant biologically active constituents. Curcumenol, a component of Curcuma wenyujin, has several biological activities. At present, despite different pharmacological activities being reported, the clinical usage of curcumenol remains under investigation. To further determine the characteristics of curcumenol, the extraction, determination, and bioactivity of the compound are summarized in this review. Existing research has reported that curcumenol exerts different pharmacological effects in regard to a variety of diseases, including anti-inflammatory, anti-oxidant, anti-bactericidal, anti-diabetic, and anti-cancer activity, and also ameliorates osteoporosis. This review of curcumenol provides a theoretical basis for further research and clinical applications.
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Affiliation(s)
- Jie Li
- State Key Laboratory of Quality Research in Chinese Medicines, Faculty of Chinese Medicine, Macau University of Science and Technology, Macau 999078, China; (J.L.)
- College of Pharmacy, Hangzhou Normal University, Hangzhou 311121, China
- School of Environmental and Chemical Engineering, Zhaoqing University, Zhaoqing 526061, China
| | - Yitian Sun
- State Key Laboratory of Quality Research in Chinese Medicines, Faculty of Chinese Medicine, Macau University of Science and Technology, Macau 999078, China; (J.L.)
- College of Pharmacy, Hangzhou Normal University, Hangzhou 311121, China
| | - Guohua Li
- State Key Laboratory of Quality Research in Chinese Medicines, Faculty of Chinese Medicine, Macau University of Science and Technology, Macau 999078, China; (J.L.)
- College of Pharmacy, Hangzhou Normal University, Hangzhou 311121, China
| | - Chunsong Cheng
- Lushan Botanical Garden, Chinese Academy of Sciences, Jiujiang 332900, China
| | - Xinbing Sui
- College of Pharmacy, Hangzhou Normal University, Hangzhou 311121, China
| | - Qibiao Wu
- State Key Laboratory of Quality Research in Chinese Medicines, Faculty of Chinese Medicine, Macau University of Science and Technology, Macau 999078, China; (J.L.)
- Zhuhai M.U.S.T. Science and Technology Research Institute, Zhuhai 519031, China
- Guangdong-Hong Kong-Macao Joint Laboratory for Contaminants Exposure and Health, Guangzhou 510006, China
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Chua RW, Song KP, Ting ASY. Comparative analysis of antimicrobial compounds from endophytic Buergenerula spartinae from orchid. Antonie Van Leeuwenhoek 2023; 116:1057-1072. [PMID: 37597137 DOI: 10.1007/s10482-023-01870-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Accepted: 08/08/2023] [Indexed: 08/21/2023]
Abstract
A rare fungal endophyte, identified as Buergenerula spartinae (C28), was isolated from the roots of Cymbidium orchids and was characterised and evaluated for its antimicrobial activities. Bio-guided fractionation revealed 4 fractions from B. spartinae (C28) having antibacterial activities against at least one bacterial pathogen tested (Bacillus cereus and Staphylococcus aureus). However, inhibitory activities were absent against pathogenic fungi (Ganoderma boninense, Pythium ultimum and Fusarium solani). Fraction 2 and fraction 4 of B. spartinae (C28) exhibited potent antibacterial activities against S. aureus (MIC: 0.078 mg/mL) and B. cereus (MIC: 0.313 mg/mL), respectively. LCMS analysis revealed the presence of antibacterial agents and antibiotics in fraction 2 (benoxinate, pyropheophorbide A, (-)-ormosanine and N-undecylbenzenesulfonic acid) and fraction 4 (kaempferol 3-p-coumarate, 6-methoxy naphthalene acetic acid, levofuraltadone, hinokitiol glucoside, 3-α(S)-strictosidine, pyropheophorbide A, 5'-hydroxystreptomycin, kanzonol N and 3-butylidene-7-hydroxyphthalide), which may be responsible for the antibacterial activities observed. Most of the bioactive compounds profiled from the antibacterial fractions were discovered for the first time from endophytic isolates (i.e. from B. spartinae (C28)). Buergenerula spartinae (C28) from Cymbidium sp. is therefore, an untapped resource of bioactive compounds for potential applications in healthcare and commercial industries.
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Affiliation(s)
- Ru Wei Chua
- School of Science, Monash University Malaysia, Jalan Lagoon Selatan, 47500, Bandar Sunway, Selangor Darul Ehsan, Malaysia
| | - Keang Peng Song
- School of Science, Monash University Malaysia, Jalan Lagoon Selatan, 47500, Bandar Sunway, Selangor Darul Ehsan, Malaysia
| | - Adeline Su Yien Ting
- School of Science, Monash University Malaysia, Jalan Lagoon Selatan, 47500, Bandar Sunway, Selangor Darul Ehsan, Malaysia.
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Wang A, Guan C, Wang T, Mu G, Tuo Y. Changes in Intracellular and Extracellular Metabolites of Mixed Lactobacillus Strains Enhance Inhibition of Pathogenic Bacterial Growth and Lipopolysaccharide-Induced Alleviation of RAW264.7 Cellular Inflammation. Probiotics Antimicrob Proteins 2023:10.1007/s12602-023-10132-z. [PMID: 37632677 DOI: 10.1007/s12602-023-10132-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/27/2023] [Indexed: 08/28/2023]
Abstract
It is important to explore whether there are antagonistic and synergistic effects between different strains of Lactobacillus when developing mixed Lactobacillus strain products. In this study, we investigated the antagonistic and symbiotic effects of co-cultured Lactobacillus strains, as well as their amelioratory effects on lipopolysaccharide (LPS)-induced inflammation and oxidative stress in RAW264.7 cells. The Lactobacillus strains tested in this paper showed no antagonism. Co-culture of Lactiplantibacillus plantarum Y44 and L. plantarum AKS-WS9 was found to show inhibiting effects on the growth of Escherichia coli and Staphylococcus aureus. Additionally, the co-cultured Lactiplantibacillus plantarum Y44 and L. plantarum AKS-WS9 relieved inflammation in RAW264.7 cells induced by LPS by inhibiting the activation of NF-κB and P38 signaling pathways and down-regulating the expression of pro-inflammatory cytokines NO, ROS, iNOs and TNF-α. And the co-cultured Lactobacillus strains activated the Nrf2 signaling pathway in the LPS-induced RAW264.7 cells to promote the expression of antioxidant enzymes in response to oxidative stress. There was a difference in intracellular and extracellular metabolites between single or co-cultured Lactobacillus strains, and the co-cultured Lactobacillus strains significantly increased extracellular metabolites 4-chlorobenzaldehyde, psoromic acid, and 2-dodecylbenzenesulfonic acid and intracellular metabolites 9(S)-HODE, pyocyanin, and LysoPA. We inferred that the better antibacterial and anti-inflammatory ability of the co-cultured Lactobacillus strains were related to the changes in the metabolites of the co-cultured Lactobacillus strains. The co-cultured L. plantarum Y44 and L. plantarum AKS-WS9 strains exhibited better anti-inflammatory abilities and had the potential to alleviate the symptoms of inflammatory diseases as mixed probiotics.
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Affiliation(s)
- Arong Wang
- School of Food Science and Technology, Dalian Polytechnic University, Dalian, 116034, People's Republic of China
- Dalian Probiotics, Function Research Key Laboratory, Dalian Polytechnic University, Dalian, 116034, People's Republic of China
| | - Chen Guan
- School of Food Science and Technology, Dalian Polytechnic University, Dalian, 116034, People's Republic of China
- Dalian Probiotics, Function Research Key Laboratory, Dalian Polytechnic University, Dalian, 116034, People's Republic of China
| | - Tieqi Wang
- School of Food Science and Technology, Dalian Polytechnic University, Dalian, 116034, People's Republic of China
- Dalian Probiotics, Function Research Key Laboratory, Dalian Polytechnic University, Dalian, 116034, People's Republic of China
| | - Guangqing Mu
- School of Food Science and Technology, Dalian Polytechnic University, Dalian, 116034, People's Republic of China
- Dalian Probiotics, Function Research Key Laboratory, Dalian Polytechnic University, Dalian, 116034, People's Republic of China
| | - Yanfeng Tuo
- School of Food Science and Technology, Dalian Polytechnic University, Dalian, 116034, People's Republic of China.
- Dalian Probiotics, Function Research Key Laboratory, Dalian Polytechnic University, Dalian, 116034, People's Republic of China.
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Akbar N, Khan NA, Giddey AD, Soares NC, Alharbi AM, Alfahemi H, Siddiqui R. Selected Gut Bacteria from Water Monitor Lizard Exhibit Effects against Pathogenic Acanthamoeba castellanii Belonging to the T4 Genotype. Microorganisms 2023; 11:microorganisms11041072. [PMID: 37110494 PMCID: PMC10142573 DOI: 10.3390/microorganisms11041072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 04/10/2023] [Accepted: 04/17/2023] [Indexed: 04/29/2023] Open
Abstract
Water monitor lizards (WMLs) reside in unhygienic and challenging ecological surroundings and are routinely exposed to various pathogenic microorganisms. It is possible that their gut microbiota produces substances to counter microbial infections. Here we determine whether selected gut bacteria of water monitor lizards (WMLs) possess anti-amoebic properties using Acanthamoeba castellanii of the T4 genotype. Conditioned media (CM) were prepared from bacteria isolated from WML. The CM were tested using amoebicidal, adhesion, encystation, excystation, cell cytotoxicity and amoeba-mediated host cell cytotoxicity assays in vitro. Amoebicidal assays revealed that CM exhibited anti-amoebic effects. CM inhibited both excystation and encystation in A. castellanii. CM inhibited amoebae binding to and cytotoxicity of host cells. In contrast, CM alone showed limited toxic effects against human cells in vitro. Mass spectrometry revealed several antimicrobials, anticancer, neurotransmitters, anti-depressant and other metabolites with biological functions. Overall, these findings imply that bacteria from unusual places, such as WML gut, produce molecules with anti-acanthamoebic capabilities.
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Affiliation(s)
- Noor Akbar
- Department of Clinical Sciences, College of Medicine, University of Sharjah, University City, Sharjah 27272, United Arab Emirates
- Sharjah Institute for Medical Research, University of Sharjah, Sharjah 27272, United Arab Emirates
| | - Naveed Ahmed Khan
- Department of Clinical Sciences, College of Medicine, University of Sharjah, University City, Sharjah 27272, United Arab Emirates
- Department of Medical Biology, Faculty of Medicine, Istinye University, Istanbul 34010, Turkey
| | - Alexander D Giddey
- Sharjah Institute for Medical Research, University of Sharjah, Sharjah 27272, United Arab Emirates
| | - Nelson C Soares
- Sharjah Institute for Medical Research, University of Sharjah, Sharjah 27272, United Arab Emirates
- Department of Medicinal Chemistry, College of Pharmacy, University of Sharjah, Sharjah 27272, United Arab Emirates
| | - Ahmad M Alharbi
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, Taif University, Taif 21944, Saudi Arabia
| | - Hasan Alfahemi
- Department of Medical Microbiology, Faculty of Medicine, Al-Baha University, P.O. Box. 1988, Al-Baha 65799, Saudi Arabia
| | - Ruqaiyyah Siddiqui
- Department of Medical Biology, Faculty of Medicine, Istinye University, Istanbul 34010, Turkey
- College of Arts and Sciences, American University of Sharjah, University City, Sharjah 26666, United Arab Emirates
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6
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Hu YX, Liu Z, Zhang Z, Deng Z, Huang Z, Feng T, Zhou QH, Mei S, Yi C, Zhou Q, Zeng PH, Pei G, Tian S, Tian XF. Antihepatoma peptide, scolopentide, derived from the centipede scolopendra subspinipes mutilans. World J Gastroenterol 2023; 29:1875-1898. [PMID: 37032730 PMCID: PMC10080696 DOI: 10.3748/wjg.v29.i12.1875] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/18/2022] [Revised: 02/02/2023] [Accepted: 03/16/2023] [Indexed: 03/28/2023] Open
Abstract
BACKGROUND Centipedes have been used to treat tumors for hundreds of years in China. However, current studies focus on antimicrobial and anticoagulation agents rather than tumors. The molecular identities of antihepatoma bioactive components in centipedes have not yet been extensively investigated. It is a challenge to isolate and characterize the effective components of centipedes due to limited peptide purification technologies for animal-derived medicines.
AIM To purify, characterize, and synthesize the bioactive components with the strongest antihepatoma activity from centipedes and determine the antihepatoma mechanism.
METHODS An antihepatoma peptide (scolopentide) was isolated and identified from the centipede scolopendra subspinipes mutilans using a combination of enzymatic hydrolysis, a Sephadex G-25 column, and two steps of high-performance liquid chromatography (HPLC). Additionally, the CCK8 assay was used to select the extracted fraction with the strongest antihepatoma activity. The molecular weight of the extracted scolopentide was characterized by quadrupole time of flight mass spectrometry (QTOF MS), and the sequence was matched by using the Mascot search engine. Based on the sequence and molecular weight, scolopentide was synthesized using solid-phase peptide synthesis methods. The synthetic scolopentide was confirmed by MS and HPLC. The antineoplastic effect of extracted scolopentide was confirmed by CCK8 assay and morphological changes again in vitro. The antihepatoma effect of synthetic scolopentide was assessed by the CCK8 assay and Hoechst staining in vitro and tumor volume and tumor weight in vivo. In the tumor xenograft experiments, qualified model mice (male 5-week-old BALB/c nude mice) were randomly divided into 2 groups (n = 6): The scolopentide group (0.15 mL/d, via intraperitoneal injection of synthetic scolopentide, 500 mg/kg/d) and the vehicle group (0.15 mL/d, via intraperitoneal injection of normal saline). The mice were euthanized by cervical dislocation after 14 d of continuous treatment. Mechanistically, flow cytometry was conducted to evaluate the apoptosis rate of HepG2 cells after treatment with extracted scolopentide in vitro. A Hoechst staining assay was also used to observe apoptosis in HepG2 cells after treatment with synthetic scolopentide in vitro. CCK8 assays and morphological changes were used to compare the cytotoxicity of synthetic scolopentide to liver cancer cells and normal liver cells in vitro. Molecular docking was performed to clarify whether scolopentide tightly bound to death receptor 4 (DR4) and DR5. qRT-PCR was used to measure the mRNA expression of DR4, DR5, fas-associated death domain protein (FADD), Caspase-8, Caspase-3, cytochrome c (Cyto-C), B-cell lymphoma-2 (Bcl-2), Bcl-2-associated X protein (Bax), x-chromosome linked inhibitor-of-apoptosis protein and Cellular fas-associated death domain-like interleukin-1β converting enzyme inhibitory protein in hepatocarcinoma subcutaneous xenograft tumors from mice. Western blot assays were used to measure the protein expression of DR4, DR5, FADD, Caspase-8, Caspase-3, and Cyto-C in the tumor tissues. The reactive oxygen species (ROS) of tumor tissues were tested.
RESULTS In the process of purification, characterization and synthesis of scolopentide, the optimal enzymatic hydrolysis conditions (extract ratio: 5.86%, IC50: 0.310 mg/mL) were as follows: Trypsin at 0.1 g (300 U/g, centipede-trypsin ratio of 20:1), enzymolysis temperature of 46 °C, and enzymolysis time of 4 h, which was superior to freeze-thawing with liquid nitrogen (IC50: 3.07 mg/mL). A peptide with the strongest antihepatoma activity (scolopentide) was further purified through a Sephadex G-25 column (obtained A2) and two steps of HPLC (obtained B5 and C3). The molecular weight of the extracted scolopentide was 1018.997 Da, and the peptide sequence was RAQNHYCK, as characterized by QTOF MS and Mascot. Scolopentide was synthesized in vitro with a qualified molecular weight (1018.8 Da) and purity (98.014%), which was characterized by MS and HPLC. Extracted scolopentide still had an antineoplastic effect in vitro, which inhibited the proliferation of Eca-109 (IC50: 76.27 μg/mL), HepG2 (IC50: 22.06 μg/mL), and A549 (IC50: 35.13 μg/mL) cells, especially HepG2 cells. Synthetic scolopentide inhibited the proliferation of HepG2 cells (treated 6, 12, and 24 h) in a concentration-dependent manner in vitro, and the inhibitory effects were the strongest at 12 h (IC50: 208.11 μg/mL). Synthetic scolopentide also inhibited the tumor volume (Vehicle vs Scolopentide, P = 0.0003) and weight (Vehicle vs Scolopentide, P = 0.0022) in the tumor xenograft experiment. Mechanistically, flow cytometry suggested that the apoptosis ratios of HepG2 cells after treatment with extracted scolopentide were 5.01% (0 μg/mL), 12.13% (10 μg/mL), 16.52% (20 μg/mL), and 23.20% (40 μg/mL). Hoechst staining revealed apoptosis in HepG2 cells after treatment with synthetic scolopentide in vitro. The CCK8 assay and morphological changes indicated that synthetic scolopentide was cytotoxic and was significantly stronger in HepG2 cells than in L02 cells. Molecular docking suggested that scolopentide tightly bound to DR4 and DR5, and the binding free energies were-10.4 kcal/mol and-7.1 kcal/mol, respectively. In subcutaneous xenograft tumors from mice, quantitative real-time polymerase chain reaction and western blotting suggested that scolopentide activated DR4 and DR5 and induced apoptosis in SMMC-7721 Liver cancer cells by promoting the expression of FADD, caspase-8 and caspase-3 through a mitochondria-independent pathway.
CONCLUSION Scolopentide, an antihepatoma peptide purified from centipedes, may inspire new antihepatoma agents. Scolopentide activates DR4 and DR5 and induces apoptosis in liver cancer cells through a mitochondria-independent pathway.
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Affiliation(s)
- Yu-Xing Hu
- College of Integrated Chinese and Western Medicine, Hunan University of Chinese Medicine, Changsha 410208, Hunan Province, China
- Hunan Key Laboratory of Translational Research in Formulas and Zheng of Traditional Chinese Medicine, Hunan University of Chinese Medicine, Changsha 410208, Hunan Province, China
| | - Zhuo Liu
- Department of Scientific Research, Hunan Academy of Traditional Chinese Medicine Affiliated Hospital, Changsha 410208, Hunan Province, China
| | - Zhen Zhang
- College of Integrated Chinese and Western Medicine, Hunan University of Chinese Medicine, Changsha 410208, Hunan Province, China
- Department of Scientific Research, Hunan Academy of Traditional Chinese Medicine Affiliated Hospital, Changsha 410208, Hunan Province, China
| | - Zhe Deng
- College of Integrated Chinese and Western Medicine, Hunan University of Chinese Medicine, Changsha 410208, Hunan Province, China
- Hunan Province University Key Laboratory of Oncology of Traditional Chinese Medicine, Hunan University of Chinese Medicine, Changsha 410208, Hunan Province, China
| | - Zhen Huang
- College of Integrated Chinese and Western Medicine, Hunan University of Chinese Medicine, Changsha 410208, Hunan Province, China
| | - Ting Feng
- College of Integrated Chinese and Western Medicine, Hunan University of Chinese Medicine, Changsha 410208, Hunan Province, China
| | - Qing-Hong Zhou
- Department of Pediatric, Shenzhen Hospital of Beijing University of Chinese Medicine, Shenzhen 518000, Guangdong Province, China
| | - Si Mei
- Department of Physiology, Hunan University of Chinese Medicine, Changsha 410208, Hunan Province, China
| | - Chun Yi
- Department of Pathology, Hunan University of Chinese Medicine, Changsha 410208, Hunan Province, China
| | - Qing Zhou
- Department of Andrology, First Hospital of Hunan University of Chinese Medicine, Changsha 410007, Hunan Province, China
| | - Pu-Hua Zeng
- Department of Oncology, Hunan Academy of Traditional Chinese Medicine Affiliated Hospital, Changsha 410208, Hunan Province, China
| | - Gang Pei
- College of Pharmacy, Hunan University of Chinese Medicine, Changsha 410208, Hunan Province, China
| | - Sha Tian
- College of Integrated Chinese and Western Medicine, Hunan University of Chinese Medicine, Changsha 410208, Hunan Province, China
- Dr Neher’s Biophysics Laboratory for Innovative Drug Discovery, Macau University of Science and Technology, Macau 999078, China
| | - Xue-Fei Tian
- College of Integrated Chinese and Western Medicine, Hunan University of Chinese Medicine, Changsha 410208, Hunan Province, China
- Hunan Key Laboratory of Translational Research in Formulas and Zheng of Traditional Chinese Medicine, Hunan University of Chinese Medicine, Changsha 410208, Hunan Province, China
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Kim WK, Shin JS, Lee J, Koh W, Ha IH, Park HJ, Lee SK, Hong JY. Effects of the administration of Shinbaro 2 in a rat lumbar disk herniation model. Front Neurol 2023; 14:1044724. [PMID: 36970511 PMCID: PMC10036394 DOI: 10.3389/fneur.2023.1044724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Accepted: 02/15/2023] [Indexed: 03/12/2023] Open
Abstract
The current standard for the pharmacological management of lumbar disk herniation (LDH), involving non-steroidal anti-inflammatory drugs, muscle relaxants, and opioid analgesics, often carries a risk of adverse events. The search for alternative therapeutic options remains a vital objective, given the high prevalence of LDH and the critical impact on the quality of life. Shinbaro 2 is a clinically effective herbal acupuncture against inflammation and various musculoskeletal disorders. Therefore, we explored whether Shinbaro 2 exerts protective effects in an LDH rat model. The results showed that Shinbaro 2 suppressed pro-inflammatory cytokines, interleukin-1 beta, tumor necrosis factor-alpha, disk degeneration-related factors, matrix metalloproteinase-1,−3,−9, and ADAMTS-5 in LDH rats. Shinbaro 2 administration reinstated a behavioral activity to a normal level in the windmill test. The results indicated that Shinbaro 2 administration restored spinal cord morphology and functions in the LDH model. Therefore, Shinbaro 2 exerted a protective effect in LDH via actions on inflammatory responses and disk degeneration, indicating that future research is warranted to assess the action mechanisms further and validate its effects.
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Affiliation(s)
- Won Kyung Kim
- College of Pharmacy, Natural Products Research Institute, Seoul National University, Seoul, Republic of Korea
| | - Joon-Shik Shin
- Jaseng Hospital of Korean Medicine, Seoul, Republic of Korea
| | - Jinho Lee
- Jaseng Hospital of Korean Medicine, Seoul, Republic of Korea
| | - Wonil Koh
- Jaseng Hospital of Korean Medicine, Seoul, Republic of Korea
| | - In-Hyuk Ha
- Jaseng Spine and Joint Research Institute, Jaseng Medical Foundations, Seoul, Republic of Korea
| | - Hyen Joo Park
- College of Pharmacy, Natural Products Research Institute, Seoul National University, Seoul, Republic of Korea
| | - Sang Kook Lee
- College of Pharmacy, Natural Products Research Institute, Seoul National University, Seoul, Republic of Korea
- *Correspondence: Sang Kook Lee
| | - Jin Young Hong
- Jaseng Spine and Joint Research Institute, Jaseng Medical Foundations, Seoul, Republic of Korea
- Jin Young Hong
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8
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Li X, Gong Y, Zhang Q, Ni X, Pang Q, Chi Y, Jiajue R, Cui L, Jiang X, Wang O, Xing X, Jiang Y, Li M, Xia W. UPLC-MS based serum metabolomics for early diagnosis of refractory tumor-induced osteomalacia: a case-control study. J Clin Endocrinol Metab 2023:7010770. [PMID: 36718510 DOI: 10.1210/clinem/dgad034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 01/14/2023] [Accepted: 01/17/2023] [Indexed: 02/01/2023]
Abstract
CONTEXT Nearly 20% patients with Tumor-induced osteomalacia (TIO) experienced recurrence or nonrecovery after surgery. Serum FGF23 and phosphate concentrations are not capable for prognosis in such cases. Despite its importance for understanding of prognosis and underlying pathogenesis, the alteration of systemic metabolism in refractory TIO remains unclear. OBJECTIVE We aimed to find the metabolomic characteristics of refractory TIO, and establish a novel predictive model for early discriminating refractory TIO based on their serum metabolomics. DESIGN AND SETTING Cross-section study for comparison of metabolomic profile between TIO and normal control, and longitudinal study for identifying prognostic model. METHODS Based on liquid chromatography-tandem mass spectrometry, we analyzed the global metabolomes of preoperative sera from 86 samples (32 TIO recovery patients, 11 non-remission patients and 43 matched controls). Statistical analyses, pathway enrichment and receiver operating characteristic analysis were performed to identified and evaluate potential markers. RESULTS Sparse partial least squares discriminant analysis indicated a clear separation of metabolomic profiles between Healthy controls and TIO patients. The serum metabolites altered in different prognostic groups. L-Pipecolic acid, 2-Dodecylbenzenesulfonic acid and 2-Deoxygalactopyranose were the top 3 metabolites that were significantly perturbed. A combination of L-Pipecolic acid and 2-Dodecylbenzenesulfonic acid demonstrated a high-performance panel for TIO prognosis evaluated by random forest algorithm (AUC=0.921, 95% confidence interval of 0.787-0.995). CONCLUSIONS We investigate the global metabolomes of refractory TIO and identify potential prognostic biomarkers preliminarily. A high sensitivity and specificity panel were identified as promising discriminating predictor, which need to be verified in more patients. This work may demonstrate novel insights into TIO prognosis and pathogenesis.
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Affiliation(s)
- Xiang Li
- Department of Endocrinology, Key Laboratory of Endocrinology, National Commission of Health, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Yiyi Gong
- Department of Endocrinology, Key Laboratory of Endocrinology, National Commission of Health, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing 100730, China
- Medical Research Center, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing 100730, China
- State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Science, Beijing, 100730, China
| | - Qi Zhang
- Department of Laboratory Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences , Beijing 100730, China
| | - Xiaolin Ni
- Department of Endocrinology, Key Laboratory of Endocrinology, National Commission of Health, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Qianqian Pang
- Department of Endocrinology, Key Laboratory of Endocrinology, National Commission of Health, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Yue Chi
- Department of Endocrinology, Key Laboratory of Endocrinology, National Commission of Health, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Ruizhi Jiajue
- Department of Endocrinology, Key Laboratory of Endocrinology, National Commission of Health, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Lijia Cui
- Department of Endocrinology, Key Laboratory of Endocrinology, National Commission of Health, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Xu Jiang
- Medical Research Center, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing 100730, China
- State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Science, Beijing, 100730, China
| | - Ou Wang
- Department of Endocrinology, Key Laboratory of Endocrinology, National Commission of Health, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Xiaoping Xing
- Department of Endocrinology, Key Laboratory of Endocrinology, National Commission of Health, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Yan Jiang
- Department of Endocrinology, Key Laboratory of Endocrinology, National Commission of Health, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Mei Li
- Department of Endocrinology, Key Laboratory of Endocrinology, National Commission of Health, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Weibo Xia
- Department of Endocrinology, Key Laboratory of Endocrinology, National Commission of Health, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing 100730, China
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9
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Susilo B, Rohim A, Wahyu ML. Serial Extraction Technique of Rich Antibacterial Compounds in Sargassum cristaefolium Using Different Solvents and Testing their Activity. CURRENT BIOACTIVE COMPOUNDS 2022; 18. [DOI: 10.2174/1573407217666210910095732] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 06/27/2021] [Accepted: 07/01/2021] [Indexed: 09/02/2023]
Abstract
Background:
Sargassum cristaefolium, as one of the brown seaweeds locally found in
Indonesia, is extracted using the serial technique employing different solvents.
Methods:
S. cristaefolium powder (50 mesh) was extracted with three different solvents, including
hexane, ethyl acetate, and methanol. S. cristaefolium powder residue was dried prior to serial re-extraction
using different solvents. Three serial extracts were obtained and named as 1-stage extract,
2-stage extract, and 3-stage extract. Besides, a single-step extract (i.e., extraction using only
methanol) was produced to be compared with three serial extracts in antibacterial activity tests (against
E. coli and S. aureus). The three serial extracts were detected for their antibacterial compounds
using GC-MS, LC-HRMS, and FT-IR.
Results:
The 3-stage extract exhibited the highest extraction yield. On S. aureus, the inhibition
zone in all extracts was not significantly different. On E.coli, the highest inhibition zone
(5.42±0.14 mm) was of the 3-stage extract; indeed, it was higher than both antibiotic and a single-
step extract. Antibacterial compounds, such as phenol, 9-Tricosene(Z)-, palmitic acid, and
oleamide, were present in all extracts. Other antibacterial compound types, both the 1-stage and 2-stage
extracts, contained 7 types, whilst the 3-stage extract contained the most types (11 types). Particularly,
hexyl cinnamic aldehyde, betaine and several cinnamic aldehyde groups were detected only
in the 3-stage extract comprising the dominant area. The carboxylic acid groups were detected in
all extracts to confirm the fatty acid structure.
Conclusions:
The serial extraction technique could produce the 3-stage extract which exhibited the
strongest antibacterial activity and contained the richest antibacterial compounds.
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Affiliation(s)
- Bambang Susilo
- Department of Agricultural Engineering, Faculty of Agricultural Technology, Universitas Brawijaya, Malang-East Java,
Indonesia
| | - Abd. Rohim
- Department of Agricultural Product Technology, Faculty of Agricultural Technology, Universitas
Brawijaya, Malang-East Java, Indonesia | Department of Agricultural Product Technology, Institut Teknologi dan
Sains Nahdlatul Ulama Pasuruan, Pasuruan-East Java, Indonesia
| | - Midia Lestari Wahyu
- Central Laboratory of Life Science, Universitas
Brawijaya, Malang-East Java, Indonesia
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10
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Pourakbar L, Moghaddam SS, Enshasy HAE, Sayyed RZ. Antifungal Activity of the Extract of a Macroalgae, Gracilariopsis persica, against Four Plant Pathogenic Fungi. PLANTS 2021; 10:plants10091781. [PMID: 34579314 PMCID: PMC8467150 DOI: 10.3390/plants10091781] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Revised: 08/24/2021] [Accepted: 08/24/2021] [Indexed: 11/16/2022]
Abstract
Nowadays, the extract of seaweeds has drawn attention as a rich source of bioactive metabolites. Seaweeds are known for their biologically active compounds whose antibacterial and antifungal activities have been documented. This research aimed to study the profile of phenolic compounds using the HPLC method and determine biologically active compounds using the GC-MS method and the antifungal activity of Gracilariopsis persica against plant pathogenic fungi. G. persica was collected from its natural habitat in Suru of Bandar Abbas, Iran, dried, and extracted by methanol. The quantitative results on phenolic compounds using the HPLC method showed that the most abundant compounds in G. persica were rosmarinic acid (20.9 ± 0.41 mg/kg DW) and quercetin (11.21 ± 0.20 mg/kg DW), and the least abundant was cinnamic acid (1.4 ± 0.10 mg/kg DW). The GC-MS chromatography revealed 50 peaks in the methanolic extract of G. persica, implying 50 compounds. The most abundant components included cholest-5-en-3-ol (3 beta) (27.64%), palmitic acid (17.11%), heptadecane (7.71%), and palmitic acid methyl ester (6.66%). The antifungal activity of different concentrations of the extract was determined in vitro. The results as to the effect of the alga extract at the rates of 200, 400, 600, 800, and 1000 μL on the mycelial growth of four important plant pathogenic fungi, including Botrytis cinerea, Aspergillus niger, Penicillium expansum, and Pyricularia oryzae, revealed that the mycelial growth of all four fungi was lower at higher concentrations of the alga extract. However, the extract concentration of 1000 μL completely inhibited their mycelial growth. The antifungal activity of this alga may be related to the phenolic compounds, e.g., rosmarinic acid and quercetin, as well as compounds such as palmitic acid, oleic acid, and other components identified using the GC-MS method whose antifungal effects have already been confirmed.
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Affiliation(s)
- Latifeh Pourakbar
- Department of Biology, Faculty of Science, Urmia University, Urmia 5756151818, Iran
- Correspondence:
| | - Sina Siavash Moghaddam
- Department of Plant Production and Genetics, Faculty of Agriculture, Urmia University, Urmia 5756151818, Iran;
| | - Hesham Ali El Enshasy
- Institute of Bioproduct Development (IBD), Universiti Teknologi Malaysia (UTM), Skudai, Johor Bahru 81310, Johor, Malaysia;
- School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia (UTM), Skudai, Johor Bahru 81310, Johor, Malaysia
- City of Scientific Research and Technology Applications (SRTA), New Burg Al Arab, Alexandria 21934, Egypt
| | - R. Z. Sayyed
- Department of Microbiology, PSGVP Mandal’s, Arts, Science & Commerce College, Shahada 425409, India;
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11
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Moura GGDD, Barros AVD, Machado F, Martins AD, Silva CMD, Durango LGC, Forim M, Alves E, Pasqual M, Doria J. Endophytic bacteria from strawberry plants control gray mold in fruits via production of antifungal compounds against Botrytis cinerea L. Microbiol Res 2021; 251:126793. [PMID: 34325193 DOI: 10.1016/j.micres.2021.126793] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Revised: 04/08/2021] [Accepted: 05/25/2021] [Indexed: 10/21/2022]
Abstract
Botrytis cinerea causes the gray mold disease in a wide range of plant hosts, especially in post-harvest periods. The control of this phytopathogen has been accomplished through the application of fungicides. However, this practice can cause environmental problems and increase fruit production costs. In addition, this fungus species has developed resistance to conventional synthetic fungicides. In this context, plant growth-promoting bacteria have shown potential for application in agricultural production because they are able to stimulate plant growth through different mechanisms, including the biological control of phytopathogens (indirect growth promotion mechanism). The aim of this work was to evaluate in vitro and in fruits the potential for indirect plant growth-promotion of bacteria isolated from strawberry leaves and roots. Dual plate method and inverted plate method were used to verify the ability of controlling in vitro the growth of Botrytis cinerea via the production of diffusible and volatile antifungal compounds, respectively. The effect of six bacterial isolates that showed greater potential for biological control in vitro was evaluated by scanning electron microscopy. Antifungal compounds produced by these bacterial isolates were identified by liquid chromatography coupled with mass spectrometry. Six bacterial strains were tested on strawberry pseudofruits. Five selected strains belong to the genus Bacillus and one to the genus Pantoea sp. Selected strains were able to inhibit more than 80 % of the mycelial growth of B. cinerea by the production of diffusible compounds and 90 % by volatile antifungal compounds production. Scanning electron microscopy showed the intense degradation of fungal hyphae caused by the presence of all bacterial strains. Bioactive compounds (salycilamide, maculosin, herniarin, lauroyl diethanolamide, baptifoline, undecanedioic acid, botrydial, 8 3-butylidene-7-hydroxyphthalide and N-(3-oxo-henoyl)-homoserine lactone) were obtained from liquid culture of these strains and extraction with ethyl acetate. All six isolates tested in vivo reduced the incidence of gray mold in strawberry pseudofruits in postharvest. It is concluded that isolates 26, 29, 65, 69, 132 (Bacillus sp.) and MQT16M1 (Pantoea sp.) have potential application for the biological control of Botrytis cinerea in strawberry via the production of diffusible and volatile antifungal compounds.
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Affiliation(s)
| | | | - Franklin Machado
- Phytopathology Department, Federal University of Viçosa, Minas Gerais, Brazil
| | | | | | | | - Moacir Forim
- Chemistry Department, Federal University of São Carlos, São Paulo, Brazil
| | - Eduardo Alves
- Phytopathology Department, Federal University of Lavras, Minas Gerais, Brazil
| | - Moacir Pasqual
- Agriculture Department, Federal University of Lavras, Minas Gerais, Brazil
| | - Joyce Doria
- Agriculture Department, Federal University of Lavras, Minas Gerais, Brazil.
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12
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The effect of natural antimicrobials against Campylobacter spp. and its similarities to Salmonella spp, Listeria spp., Escherichia coli, Vibrio spp., Clostridium spp. and Staphylococcus spp. Food Control 2021. [DOI: 10.1016/j.foodcont.2020.107745] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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13
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Feng XZ, Xiao Z, Zhang L, Liao S, Chen S, Luo H, He L, Fan G, Wang Z. Antifungal Activity of β-Pinene-Based Hydronopyl Quaternary Ammonium Salts Against Phytopathogenic Fungi. Nat Prod Commun 2020. [DOI: 10.1177/1934578x20948365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
β-Pinene can be used as a cheap source to synthesize a large number of high value-added derivatives. In this study, a series of β-pinene derivatives was prepared, and the antifungal activities of the compounds were assessed against phytopathogenic fungi. Eight N-alkyl hydronopyl diethyl ammonium halide salts were synthesized by the reaction of hydronopyl diethyl ammonium halide with 8 halogenated alkanes. The structures of the synthesized products were characterized by Fourier-transform infrared spectroscopy and nuclear magnetic resonance spectroscopy and mass spectrometry. The antifungal activities of these derivatives were tested against 11 plant pathogens, and the preliminary structure-activity relationship is discussed. Some derivatives exhibited moderate to significant antifungal activity due to the fusion of the hydronopyl, a long-chain alkyl, bromine, and iodine anionic groups. In contrast to the structure-activity relationship of compounds 2a, 2b, and 2c, iodine ions in 2f, 2g, and 2f had a significant effect on enhancing the antifungal activity against Colletotrichum gloeosporioides, S clerotinia sclerotiorum, Phytophthora capsici, Phomopsis, Sphaeropsis sapinea, Glomerella cingulata, and Fusicoccum aesculi. A higher molecular weight could increase the antifungal activity against Fusarium proliferatum, Alternaria kikuchiana, Sclerotinia sclerotiorum, P. capsici, Phomopsis, and S. sapinea. Compounds 2d and 2e exhibited broad-spectrum antifungal activity against the tested strains. These derivatives are expected to be used as precursor molecules for novel pesticide development in further research.
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Affiliation(s)
- Xue Zhen Feng
- College of Forestry, Jiangxi Agriculture University, East China Woody Fragrance and Flavor Engineering Research Center of National Forestry and Grassland Administration, Nanchang, China
| | - Zhuanquan Xiao
- Department of Organic Chemistry, College of Chemistry & Chemical Engineering, Jiangxi Normal University, Nanchang, Jiangxi, China
| | - Li Zhang
- College of Forestry, Jiangxi Agriculture University, East China Woody Fragrance and Flavor Engineering Research Center of National Forestry and Grassland Administration, Nanchang, China
| | - Shengliang Liao
- College of Forestry, Jiangxi Agriculture University, East China Woody Fragrance and Flavor Engineering Research Center of National Forestry and Grassland Administration, Nanchang, China
| | - Shangxing Chen
- College of Forestry, Jiangxi Agriculture University, East China Woody Fragrance and Flavor Engineering Research Center of National Forestry and Grassland Administration, Nanchang, China
| | - Hai Luo
- College of Forestry, Jiangxi Agriculture University, East China Woody Fragrance and Flavor Engineering Research Center of National Forestry and Grassland Administration, Nanchang, China
| | - Lu He
- College of Forestry, Jiangxi Agriculture University, East China Woody Fragrance and Flavor Engineering Research Center of National Forestry and Grassland Administration, Nanchang, China
| | - Guorong Fan
- College of Forestry, Jiangxi Agriculture University, East China Woody Fragrance and Flavor Engineering Research Center of National Forestry and Grassland Administration, Nanchang, China
| | - Zongde Wang
- College of Forestry, Jiangxi Agriculture University, East China Woody Fragrance and Flavor Engineering Research Center of National Forestry and Grassland Administration, Nanchang, China
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14
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Antibacterial Activities of Selected Pure Compounds Isolated from Gut Bacteria of Animals Living in Polluted Environments. Antibiotics (Basel) 2020; 9:antibiotics9040190. [PMID: 32316471 PMCID: PMC7235713 DOI: 10.3390/antibiotics9040190] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2020] [Revised: 04/04/2020] [Accepted: 04/07/2020] [Indexed: 01/16/2023] Open
Abstract
Antibiotic resistance is a global threat to public health, further accelerated by the misuse of antibiotics in humans and animals. Our recent studies have shown that gut bacteria of animals living in polluted environments are a potential source of antibacterials. Gut bacteria of cockroaches, water monitor lizards and the turtle exhibited molecules such as curcumenol, docosanedioic acid, N-acyl-homoserine lactone, L-homotyrosine and Di-rhamnolipids. Using purified compounds, assays were performed to determine their antibacterial properties using serial dilution method, cytotoxic effects using lactate dehydrogenase release, and cell viability using MTT assay. The results revealed that the purified compounds exhibited significant antibacterial activities (p < 0.05) against selected Gram-negative (Pseudomonas aeruginosa) and Gram-positive bacteria (Streptococcus pyogenes) with effective MIC50 and MIC90 at µg concentrations, and with minimal effects on human cells as observed from LDH and MTT assays. These findings are significant and provide a basis for the rational development of therapeutic antibacterials. Future studies are needed to determine in vivo effects of the identified molecules together with their mode of action, which could lead to the development of novel antibacterial(s).
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15
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Chu Y, Qiu P, Yu R. Centipede Venom Peptides Acting on Ion Channels. Toxins (Basel) 2020; 12:toxins12040230. [PMID: 32260499 PMCID: PMC7232367 DOI: 10.3390/toxins12040230] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2020] [Revised: 03/30/2020] [Accepted: 04/01/2020] [Indexed: 12/19/2022] Open
Abstract
Centipedes are among the oldest venomous arthropods that use their venom to subdue the prey. The major components of centipede venom are a variety of low-molecular-weight peptide toxins that have evolved to target voltage-gated ion channels to interfere with the central system of prey and produce pain or paralysis for efficient hunting. Peptide toxins usually contain several intramolecular disulfide bonds, which confer chemical, thermal and biological stability. In addition, centipede peptides generally have novel structures and high potency and specificity and therefore hold great promise both as diagnostic tools and in the treatment of human disease. Here, we review the centipede peptide toxins with reported effects on ion channels, including Nav, Kv, Cav and the nonselective cation channel polymodal transient receptor potential vanilloid 1 (TRPV1).
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Affiliation(s)
- YanYan Chu
- School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China;
- Laboratory for Marine Drugs and Bioproducts, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266003, China
- Innovation Center for Marine Drug Screening & Evaluation, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266003, China
- Marine Biomedical Research Institute of Qingdao, Qingdao 266071, China
- Correspondence: (Y.C.); (R.Y.)
| | - PeiJu Qiu
- School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China;
- Laboratory for Marine Drugs and Bioproducts, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266003, China
- Innovation Center for Marine Drug Screening & Evaluation, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266003, China
- Marine Biomedical Research Institute of Qingdao, Qingdao 266071, China
| | - RiLei Yu
- School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China;
- Laboratory for Marine Drugs and Bioproducts, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266003, China
- Innovation Center for Marine Drug Screening & Evaluation, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266003, China
- Correspondence: (Y.C.); (R.Y.)
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