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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Li, Guanghui Xu, Yunfeng Wang, Xin Zhang, Baigang Shi, Chao Zhang, Weisong Xia, Xiaodong |
| Description | Country affiliation: China Author Affiliation: Li G ( College of Food Science and Engineering, Northwest A&F University , Yangling, Shaanxi, China .) |
| Abstract | Pomegranate rind has been reported to inhibit several foodborne pathogens, and its antimicrobial activity has been attributed mainly to its tannin fraction. This study aimed to investigate the antimicrobial activity of the tannin-rich fraction from pomegranate rind (TFPR) against Listeria monocytogenes and its mechanism of action. The tannin-related components of TFPR were analyzed by high-performance liquid chromatography and liquid chromatography-mass spectrometry, and the minimum inhibitory concentration (MIC) of TFPR was determined using the agar dilution method. Extracellular potassium concentration, the release of cell constituents, intra- and extracellular ATP concentrations, membrane potential, and intracellular pH (pHin) were measured to elucidate a possible antibacterial mechanism. Punicalagin (64.2%, g/g) and ellagic acid (3.1%, g/g) were detected in TFPR, and the MICs of TFPR were determined to be 1.25-5.0 mg/mL for different L. monocytogenes strains. Treatment with TFPR induced a decrease of the intracellular ATP concentration, an increase of the extracellular concentrations of potassium and ATP, and the release of cell constituents. A reduction of pHin and cell membrane hyperpolarization were observed after treatment. Electron microscopic observations showed that the cell membrane structures of L. monocytogenes were apparently impaired by TFPR. It is concluded that TFPR could destroy the integrity of the cell membrane of L. monocytogenes, leading to a loss of cell homeostasis. These findings indicate that TFPR has the potential to be used as a food preservative in order to control L. monocytogenes contamination in food and reduce the risk of listeriosis. |
| File Format | HTM / HTML |
| ISSN | 15353141 |
| Issue Number | 4 |
| Volume Number | 11 |
| e-ISSN | 15567125 |
| Journal | Foodborne Pathogens and Disease |
| Language | English |
| Publisher | Mary Ann Liebert, Inc. |
| Publisher Date | 2014-04-01 |
| Publisher Place | United States |
| Access Restriction | Subscribed |
| Subject Keyword | Discipline Microbiology Discipline Parasitology Discipline Nutritional Sciences Anti-infective Agents Pharmacology Foodborne Diseases Prevention & Control Listeria Monocytogenes Drug Effects Listeriosis Plant Extracts Punicaceae Chemistry Adenosine Triphosphate Analysis Isolation & Purification Cell Membrane Colony Count, Microbial Dose-response Relationship, Drug Ellagic Acid Food Contamination Food Preservatives Microbiology Fruit Hydrogen-ion Concentration Hydrolyzable Tannins Cytology Potassium Tannins Journal Article Research Support, Non-u.s. Gov't |
| Content Type | Text |
| Resource Type | Article |
| Subject | Animal Science and Zoology Microbiology Applied Microbiology and Biotechnology Food Science |
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