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Du R, Qu Y, Zhao M, Liu Y, Qi PX, Sun X. Logistic modeling to predict the minimum inhibitory concentration (MIC) of olive leaf extract (OLE) against Listeria monocytogenes. PLoS One 2022; 17:e0263359. [PMID: 35089984 PMCID: PMC8797264 DOI: 10.1371/journal.pone.0263359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Accepted: 01/17/2022] [Indexed: 11/19/2022] Open
Abstract
Olive leaf extract (OLE) has been increasingly recognized as a natural and effective antimicrobial against a host of foodborne pathogens. This study attempts to predict the minimum inhibitory concentration (MIC) of OLE against Listeria monocytogenes F2365 by utilizing the asymptotic deceleration point (PDA) in a logistic model (LM), namely MIC-PDA. The experimental data obtained from the inhibitory rate (IR) versus OLE concentration against L. monocytogenes were sufficiently fitted (R2 = 0.88957). Five significant critical points were derived by taking the multi-order derivatives of the LM function: the inflection point (PI), the maximum acceleration point (PAM), the maximum deceleration point (PDM), the absolute acceleration point (PAA), and the asymptotic deceleration point (PDA). The PDA ([OLE] = 37.055 mg/mL) was employed to approximate the MIC-PDA. This MIC value was decreased by over 42% compared to the experimental MIC of 64.0 mg/mL, obtained using the conventional 2-fold dilution method (i.e., MIC-2fold). The accuracy of MIC-PDA was evaluated by an in vitro L. monocytogenes growth inhibition assay. Finally, the logistic modeling method was independently validated using our previously published inhibition data of OLE against the growths of Escherichia coli O157:H7 and Salmonella enteritidis. The MIC-PDA (for [OLE]) values were estimated to be 41.083 and 35.313 mg/mL, respectively, compared to the experimental value of 62.5 mg/mL. Taken together, MIC-PDA, as estimated from the logistic modeling, holds the potential to shorten the time and reduce cost when OLE is used as an antimicrobial in the food industry.
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Affiliation(s)
- Renjie Du
- College of Life Science, Northeast Forestry University, Harbin, Heilongjiang Province, People's Republic of China
- Mudanjiang Branch of Heilongjiang Academy of Forestry Science, Mudanjiang, Heilongjiang Province, People's Republic of China
| | - Yuejun Qu
- Mudanjiang Branch of Heilongjiang Academy of Forestry Science, Mudanjiang, Heilongjiang Province, People's Republic of China
| | - Min Zhao
- College of Life Science, Northeast Forestry University, Harbin, Heilongjiang Province, People's Republic of China
| | - Yanhong Liu
- Molecular Characterization of Foodborne Pathogens Research Unit, Eastern Regional Research Center, Agricultural Research Service, United States Department of Agriculture, Wyndmoor, Pennsylvania, United States of America
| | - Phoebe X Qi
- Dairy and Functional Foods Research Unit, Eastern Regional Research Center, Agricultural Research Service, United States Department of Agriculture, Wyndmoor, Pennsylvania, United States of America
| | - Xingbin Sun
- College of Life Science, Northeast Forestry University, Harbin, Heilongjiang Province, People's Republic of China
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Li X, He X, He D, Liu Y, Chen K, Yin P. A polymeric co-assembly of subunit vaccine with polyoxometalates induces enhanced immune responses. NANO RESEARCH 2021; 15:4175-4180. [PMID: 34925708 PMCID: PMC8670867 DOI: 10.1007/s12274-021-4004-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Revised: 11/16/2021] [Accepted: 11/17/2021] [Indexed: 06/14/2023]
Abstract
Long-lasting protective immune responses are expected following vaccination. However, most vaccines alone are inability to evoke an efficient protection. The combinatory administration of adjuvants with vaccines is critical for generating the enhanced immune responses. Herein, with biocompatible poly(4-vinylpyridine) (P4VP) as template, 2.5 nm iron/molybdenum oxide cluster, {Mo72Fe30}, is applied as an adjuvant to co-assemble with antigens of Mycobacterium bovis via hydrogen bonding at molecular scale. Molecular scale integration of the antigens and {Mo72Fe30} and their full exposure to body fluid media contribute to the augmentation of both humoral and cellular immune responses of the vaccines after inoculation in mice. Anti-inflammatory factor IL-10 gradually increases after 2 weeks followed by a final back to normal level by the 5th week. The balance between proinflammatory cytokines and anti-inflammatory factors suggests that immune system can be activated in the early stage of infection by the antigens carried by the supra-particles and secrete acute inflammatory factors for host defense and antiinflammatory factors for immune protection. Electronic Supplementary Material Supplementary material (further structural analysis and biological analsyis) is available in the online version of this article at 10.1007/s12274-021-4004-9.
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Affiliation(s)
- Xinpei Li
- South China Advanced Institute for Soft Matter Science and Technology, School of Molecular Science and Engineering, South China University of Technology, Guangzhou, 510640 China
- Guangdong Provincial Key Laboratory of Functional and Intelligent Hybrid Materials and Devices, South China University of Technology, Guangzhou, 510640 China
| | - Xiaofeng He
- South China Advanced Institute for Soft Matter Science and Technology, School of Molecular Science and Engineering, South China University of Technology, Guangzhou, 510640 China
- Guangdong Provincial Key Laboratory of Functional and Intelligent Hybrid Materials and Devices, South China University of Technology, Guangzhou, 510640 China
| | - Dongrong He
- South China Advanced Institute for Soft Matter Science and Technology, School of Molecular Science and Engineering, South China University of Technology, Guangzhou, 510640 China
- Guangdong Provincial Key Laboratory of Functional and Intelligent Hybrid Materials and Devices, South China University of Technology, Guangzhou, 510640 China
| | - Yuan Liu
- South China Advanced Institute for Soft Matter Science and Technology, School of Molecular Science and Engineering, South China University of Technology, Guangzhou, 510640 China
- Guangdong Provincial Key Laboratory of Functional and Intelligent Hybrid Materials and Devices, South China University of Technology, Guangzhou, 510640 China
| | - Kun Chen
- South China Advanced Institute for Soft Matter Science and Technology, School of Molecular Science and Engineering, South China University of Technology, Guangzhou, 510640 China
- Guangdong Provincial Key Laboratory of Functional and Intelligent Hybrid Materials and Devices, South China University of Technology, Guangzhou, 510640 China
| | - Panchao Yin
- South China Advanced Institute for Soft Matter Science and Technology, School of Molecular Science and Engineering, South China University of Technology, Guangzhou, 510640 China
- Guangdong Provincial Key Laboratory of Functional and Intelligent Hybrid Materials and Devices, South China University of Technology, Guangzhou, 510640 China
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Yang D, Li J, Liang C, Tian L, Shi C, Hui N, Liu Y, Ling M, Xin L, Wan M, Li H, Zhao Q, Ren X, Liu H, Cao W. Syringa microphylla Diels: A comprehensive review of its phytochemical, pharmacological, pharmacokinetic, and toxicological characteristics and an investigation into its potential health benefits. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2021; 93:153770. [PMID: 34678528 DOI: 10.1016/j.phymed.2021.153770] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Revised: 07/31/2021] [Accepted: 09/20/2021] [Indexed: 06/13/2023]
Abstract
BACKGROUND Syringa microphylla Diels is a plant in the family Syringa Linn. For hundreds of years, its flowers and leaves have been used as a folk medicine for the treatment of cough, inflammation, colds, sore throat, acute hepatitis, chronic hepatitis, early liver cirrhosis, fatty liver, and oesophageal cancer. PURPOSE For the first time, we have comprehensively reviewed information on Syringa microphylla Diels that is not included in the Pharmacopoeia, clarified the pharmacological mechanisms of Syringa microphylla Diels and its active ingredients from a molecular biology perspective, compiled in vivo and in vitro animal experimental data and clinical data, and summarized the toxicology and pharmacokinetics of Syringa microphylla Diels. The progress in toxicology research is expected to provide a theoretical basis for the development of new drugs from Syringa microphylla Diels, a natural source of compounds that are potentially beneficial to human health. METHODS The PubMed, Google Scholar, China National Knowledge Infrastructure, Web of Science, SciFinder Scholar and Thomson Reuters databases were utilized to conduct a comprehensive search of published literature as of July 2021 to find original literature related to Syringa microphylla Diels and its active ingredients. RESULTS To date, 72 compounds have been isolated and identified from Syringa microphylla Diels, and oleuropein, verbascoside, isoacteoside, echinacoside, forsythoside B, and eleutheroside B are the main active components. These compounds have antioxidant, antibacterial, anti-inflammatory, and neuroprotective effects, and their safety and effectiveness have been demonstrated in long-term traditional applications. Molecular pharmacology experiments have indicated that the active ingredients of Syringa microphylla Diels exert their pharmacological effects in various ways, primarily by reducing oxidative stress damage via Nrf2/ARE pathway regulation, regulating inflammatory factors and inducing apoptosis through the MAPK and NF-κB pathways. CONCLUSION This comprehensive review of Syringa microphylla Diels provides new insights into the correlations among molecular mechanisms, the importance of toxicology and pharmacokinetics, and potential ways to address the limitations of current research. As Syringa microphylla Diels is a natural low-toxicity botanical medicine, it is worthy of development and utilization and is an excellent choice for treating various diseases.
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Affiliation(s)
- Dan Yang
- School of Food and Bioengineering, Shaanxi University of Science & Technology, Xi'an 710021, PR China
| | - Jingyi Li
- School of Food and Bioengineering, Shaanxi University of Science & Technology, Xi'an 710021, PR China
| | - Chengyuan Liang
- School of Food and Bioengineering, Shaanxi University of Science & Technology, Xi'an 710021, PR China.
| | - Lei Tian
- School of Food and Bioengineering, Shaanxi University of Science & Technology, Xi'an 710021, PR China; College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science & Technology, Xi'an 710021, PR China
| | - Chunyang Shi
- School of Food and Bioengineering, Shaanxi University of Science & Technology, Xi'an 710021, PR China
| | - Nan Hui
- School of Food and Bioengineering, Shaanxi University of Science & Technology, Xi'an 710021, PR China
| | - Yuan Liu
- School of Food and Bioengineering, Shaanxi University of Science & Technology, Xi'an 710021, PR China
| | - Mei Ling
- School of Food and Bioengineering, Shaanxi University of Science & Technology, Xi'an 710021, PR China
| | - Liang Xin
- School of Food and Bioengineering, Shaanxi University of Science & Technology, Xi'an 710021, PR China
| | - Minge Wan
- School of Medicine and Pharmacy, Shaanxi University of Business & Commerce, Xi'an 712046, PR China
| | - Han Li
- School of Food and Bioengineering, Shaanxi University of Science & Technology, Xi'an 710021, PR China
| | - Qianqian Zhao
- School of Food and Bioengineering, Shaanxi University of Science & Technology, Xi'an 710021, PR China
| | - Xiaodong Ren
- Medical College, Guizhou University, Guiyang 550025, PR China.
| | - Hong Liu
- Zhuhai Jinan Selenium Source Nanotechnology Co., Ltd., Hengqin New Area, Zhuhai 519030, PR China.
| | - Wenqiang Cao
- Zhuhai Jinan Selenium Source Nanotechnology Co., Ltd., Hengqin New Area, Zhuhai 519030, PR China
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Zhang K, Zhang Z, Zhou X, Zhang N. Gold Nanowires – Assisted Prussian Blue Enhancing Peroxidase – Like Activity for the Non‐enzymatic Electrochemically Sensing H
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Released From Living Cells. ELECTROANAL 2021. [DOI: 10.1002/elan.202060506] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Keying Zhang
- Anhui Key Laboratory of Spin Electron and Nanomaterials of Anhui Higher Education Institues; School of Chemistry and Chemical Engineering Suzhou University Suzhou Anhui 234000 China
- State Key Laboratory of Transducer Technology, Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences Shanghai 200050 China
| | - Ziqing Zhang
- Anhui Key Laboratory of Spin Electron and Nanomaterials of Anhui Higher Education Institues; School of Chemistry and Chemical Engineering Suzhou University Suzhou Anhui 234000 China
| | - Xiaolong Zhou
- Anhui Key Laboratory of Spin Electron and Nanomaterials of Anhui Higher Education Institues; School of Chemistry and Chemical Engineering Suzhou University Suzhou Anhui 234000 China
| | - Na Zhang
- Anhui Key Laboratory of Spin Electron and Nanomaterials of Anhui Higher Education Institues; School of Chemistry and Chemical Engineering Suzhou University Suzhou Anhui 234000 China
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Ceruso M, Clement JA, Todd MJ, Zhang F, Huang Z, Anastasio A, Pepe T, Liu Y. The Inhibitory Effect of Plant Extracts on Growth of the Foodborne Pathogen, Listeria monocytogenes. Antibiotics (Basel) 2020; 9:E319. [PMID: 32545188 PMCID: PMC7344723 DOI: 10.3390/antibiotics9060319] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Revised: 06/09/2020] [Accepted: 06/09/2020] [Indexed: 01/26/2023] Open
Abstract
Listeria monocytogenes is a foodborne pathogen responsible for about 1600 illnesses each year in the United States (US) and about 2500 confirmed invasive human cases in European Union (EU) countries. Several technologies and antimicrobials are applied to control the presence of L. monocytogenes in food. Among these, the use of natural antimicrobials is preferred by consumers. This is due to their ability to inhibit the growth of foodborne pathogens but not prompt negative safety concerns. Among natural antimicrobials, plant extracts are used to inactivate L. monocytogenes. However, there is a large amount of these types of extracts, and their active compounds remain unexplored. The aim of this study was to evaluate the antibacterial activity against L. monocytogenes of about 800 plant extracts derived from plants native to different countries worldwide. The minimal inhibitory concentrations (MICs) were determined, and scanning electron microscopy (SEM) was used to verify how the plant extracts affected L. monocytogenes at the microscopic level. Results showed that 12 of the plant extracts had inhibitory activity against L. monocytogenes. Future applications of this study could include the use of these plant extracts as new preservatives to reduce the risk of growth of pathogens and contamination in the food industry from L. monocytogenes.
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Affiliation(s)
- Marina Ceruso
- Department of Veterinary Medicine and Animal Production, University of Naples Federico II, 80100 Naples, Italy; (M.C.); (A.A.); (T.P.)
| | - Jason A. Clement
- Natural Products Discovery Institute, Baruch S. Blumberg Institute, 3805 Old Easton Rd., Doylestown, PA 18960, USA; (J.A.C.); (M.J.T.)
| | - Matthew J. Todd
- Natural Products Discovery Institute, Baruch S. Blumberg Institute, 3805 Old Easton Rd., Doylestown, PA 18960, USA; (J.A.C.); (M.J.T.)
| | - Fangyuan Zhang
- Department of Chemical and Biological Engineering, Villanova University, Villanova, PA 19085, USA; (F.Z.); (Z.H.)
| | - Zuyi Huang
- Department of Chemical and Biological Engineering, Villanova University, Villanova, PA 19085, USA; (F.Z.); (Z.H.)
| | - Aniello Anastasio
- Department of Veterinary Medicine and Animal Production, University of Naples Federico II, 80100 Naples, Italy; (M.C.); (A.A.); (T.P.)
| | - Tiziana Pepe
- Department of Veterinary Medicine and Animal Production, University of Naples Federico II, 80100 Naples, Italy; (M.C.); (A.A.); (T.P.)
| | - Yanhong Liu
- Eastern Regional Research Center, Agricultural Research Service, U.S. Department of Agriculture, 600 East Mermaid Lane, Wyndmoor, PA 19038, USA
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