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Nasrollahian S, Moradi F, Hadi N, Ranjbar S, Ranjbar R. An update on alternative therapy for Escherichia coli causing urinary tract infections; a narrative review. Photodiagnosis Photodyn Ther 2024; 46:104075. [PMID: 38574879 DOI: 10.1016/j.pdpdt.2024.104075] [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: 10/27/2023] [Revised: 03/30/2024] [Accepted: 04/01/2024] [Indexed: 04/06/2024]
Abstract
BACKGROUND Urinary tract infections (UTIs) are the most common type of nosocomial infection and severe health issues because of the difficulties and frequent recurrence. Today, alternative methods such as sonodynamic therapy (SDT), photodynamic therapy (PDT) and herbal materials use for treating infections like UTI in many countries. METHOD We conducted searches of the biomedical databases (Google Scholar, Scopus, PubMed, and Web of sciences) to identify related studies from 2008 to 2023. RESULT SDT aims to use ultrasound to activate a sonosensitizer, which causes a biological effect by raising reactive oxygen species (ROS). When bacteria are exposed to ROS, several important effects occur: oxidative damage, DNA damage, protein dysfunction etc. SDT with herbal medicine significantly reduced the number of colony-forming units and bactericidal activity for Klebsiella pneumonia and E. coli. PDT is a promising treatment for cancer and microbial infections, combining a photosensitiser, light and tissue molecular oxygen. It involves a photosensitizer, light source, and oxygen, with variations affecting microbial binding and bactericidal activity. Factors affecting antibacterial properties include plant type, growing conditions, harvesting, and processing. This review highlights the recent advancements in sonodynamic, photodynamic, herbal, and bio-material-based approaches in the treatment of E. coli infections. CONCLUSIONS These alternative therapies offer exciting prospects for addressing UTIs, especially in cases where traditional antibiotic treatments may be less effective. Further research and clinical studies are warranted to fully explore the potential of these innovative treatment modalities in combating UTIs and improving patient outcomes.
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Affiliation(s)
- Sina Nasrollahian
- Department of Bacteriology and Virology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Farhad Moradi
- Department of Bacteriology and Virology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Nahal Hadi
- Department of Bacteriology and Virology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Sina Ranjbar
- Department of Microbiology, Shahr-e-Qods Branch, Islamic Azad University, Tehran, Iran
| | - Reza Ranjbar
- Molecular Biology Research Center, Systems Biology and Poisonings Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran.
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Natural Polyphenols for Prevention and Treatment of Urinary Tract Infections. Int J Mol Sci 2023; 24:ijms24043277. [PMID: 36834683 PMCID: PMC9966151 DOI: 10.3390/ijms24043277] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Revised: 01/30/2023] [Accepted: 02/03/2023] [Indexed: 02/10/2023] Open
Abstract
Urinary tract infections (UTIs) are the second most common type of bacterial infection worldwide. UTIs are gender-specific diseases, with a higher incidence in women. This type of infection could occur in the upper part of the urogenital tract, leading to pyelonephritis and kidney infections, or in the lower part of the urinary tract, leading to less serious pathologies, mainly cystitis and urethritis. The most common etiological agent is uropathogenic E. coli (UPEC), followed by Pseudomonas aeruginosa and Proteus mirabilis. Conventional therapeutic treatment involves the use of antimicrobial agents, but due to the dramatic increase in antimicrobial resistance (AMR), this strategy has partially lost its therapeutic efficacy. For this reason, the search for natural alternatives for UTI treatment represents a current research topic. Therefore, this review summarized the results of in vitro and animal- or human-based in vivo studies aimed to assess the potential therapeutic anti-UTI effects of natural polyphenol-based nutraceuticals and foods. In particular, the main in vitro studies were reported, describing the principal molecular therapeutic targets and the mechanism of action of the different polyphenols studied. Furthermore, the results of the most relevant clinical trials for the treatment of urinary tract health were described. Future research is needed to confirm and validate the potential of polyphenols in the clinical prophylaxis of UTIs.
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Chaudhary P, Mitra D, Das Mohapatra PK, Oana Docea A, Mon Myo E, Janmeda P, Martorell M, Iriti M, Ibrayeva M, Sharifi-Rad J, Santini A, Romano R, Calina D, Cho WC. Camellia sinensis: insights on its molecular mechanisms of action towards nutraceutical, anticancer potential and other therapeutic applications. ARAB J CHEM 2023. [DOI: 10.1016/j.arabjc.2023.104680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023] Open
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Bacteriospermia and Male Infertility: Role of Oxidative Stress. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2022; 1358:141-163. [PMID: 35641869 DOI: 10.1007/978-3-030-89340-8_7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Male infertility is one of the major challenging and prevalent diseases having diverse etiologies of which bacteriospermia play a significant role. It has been estimated that approximately 15% of all infertility cases are due to infections caused by uropathogens and in most of the cases bacteria are involved in infection and inflammation leading to the development of bacteriospermia. In response to bacterial load, excess infiltration of leukocytes in the urogenital tract occurs and concomitantly generates oxidative stress (OS). Bacteria may induce infertility either by directly interacting with sperm or by generating reactive oxygen species (ROS) and impair sperm parameters such as motility, volume, capacitation, hyperactivation. They may also induce apoptosis leading to sperm death. Acute bacteriospermia is related with another clinical condition called leukocytospermia and both compromise male fertility potential by OS-mediated damage to sperm leading to male infertility. However, bacteriospermia as a clinical condition as well as the mechanism of action remains poorly understood, necessitating further research in order to understand the role of individual bacterial species and their impact in male infertility.
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Evaluation of the Antioxidant Activity, Deodorizing Effect, and Antibacterial Activity of 'Porotan' Chestnut By-Products and Establishment of a Compound Paper. Foods 2021; 10:foods10051141. [PMID: 34065309 PMCID: PMC8161069 DOI: 10.3390/foods10051141] [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: 05/01/2021] [Revised: 05/18/2021] [Accepted: 05/19/2021] [Indexed: 12/23/2022] Open
Abstract
Chestnuts are widely cultivated for their edible portion (kernel), whereas the non-edible parts are discarded. To enable the utilization of the by-products of processed chestnuts, we separated them into green and brown burs, shells, inner skin, and leaves, and analyzed the bioactive properties of the ground components. We also created a composite paper, comprising the inner skin, and examined its deodorant properties. It was revealed that the inner skin had the highest functionality and showed potent antioxidant, antibacterial, and deodorant properties. Furthermore, when we produced a paper, containing 60% inner skin, and examined its deodorant properties, we found that it was highly effective in deodorizing ammonia and acetic acid gases. These results show that the inner skin of chestnuts is a promising material for developing hygiene and other products.
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Valiyan F, Koohsari H, Fadavi A. Use of Response surface methodology to investigate the effect of several fermentation conditions on the antibacterial activity of several kombucha beverages. JOURNAL OF FOOD SCIENCE AND TECHNOLOGY 2021; 58:1877-1891. [PMID: 33897024 PMCID: PMC8021504 DOI: 10.1007/s13197-020-04699-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 07/14/2020] [Accepted: 08/06/2020] [Indexed: 05/27/2023]
Abstract
This study aimed to investigate the effect of sugar concentration and fermentation time on the antibacterial activity of kombucha beverages prepared with four herbal teas. Four types of herbal teas including, black and green tea, lemon verbena, and peppermint were prepared then sweetened with 2, 5, and 8% sugar. The herbal teas inoculated with actively kombucha culture and after 7, 14, and 21 days, the antibacterial activity of the supernatant of beverages was evaluated against four bacteria based on agar well diffusion method. RSM was used to investigate the effect of fermentation time, sugar concentration, and tea type on the antibacterial activity of beverages. Sugar concentration and fermentation time showed a significant effect on the antibacterial activity of beverages-against all tested bacteria and type of herbal tea affected the antibacterial activity of beverages-against E. coli and S. aureus. Kombucha prepared with black tea at sugar 8% and fermentation time of 21 days showed the most antibacterial activity against B. cereus. The most antibacterial activity against S. aureus was observed in kombucha beverages prepared with green tea and peppermint for fermentation time of 21 days, at 2% and 8% sugar, respectively. Prepared beverages with peppermint and lemon verbena at 8% sugar and 21 days of fermentation showed the most antibacterial activity against E. coli and S. dysenteriae respectively. Generally, to achieve the highest antibacterial activity against the tested bacteria recommended preparation of kombucha beverages at the sugar of 8% and fermentation time of 21 days.
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Affiliation(s)
- Fateme Valiyan
- Department of Food Science and Technology, Azadshahr Branch, Islamic Azad University, Azadshahr, Golestan Iran
| | - Hadi Koohsari
- Department of Microbiology, Azadshahr Branch, Islamic Azad University, Azadshahr, Golestan Iran
| | - Abolfazl Fadavi
- Department of Food Science and Technology, Azadshahr Branch, Islamic Azad University, Azadshahr, Golestan Iran
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7
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Abstract
Plants that are primarily used as a food source commonly have undervalued biological properties beyond the basic supply of nutrients. One important example of this are the antimicrobial properties of plants. Inclusion of natural and food grade antimicrobial ingredients in recipes to prevent food spoilage and disease transmission, or in cosmetic products to prevent transient and pathogenic bacteria would have world-wide public health implications. A patented natural polyphenol rich sugar cane extract (PRSE), is marketed as a high anti-oxidant and polyphenol ingredient, but its anti-microbial activity has not been reported previously. We determined the anti-bacterial properties of PRSE on common human pathogens relating to a range of diseases including food poisoning, tooth decay, acne and severe skin infections using disc/well diffusion experiments. Our findings indicate that PRSE is an efficient antimicrobial, which could be included at differing dosages to target a range of food borne and environmental pathogens.
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Das S. Natural therapeutics for urinary tract infections-a review. FUTURE JOURNAL OF PHARMACEUTICAL SCIENCES 2020; 6:64. [PMID: 33215041 PMCID: PMC7498302 DOI: 10.1186/s43094-020-00086-2] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Accepted: 08/18/2020] [Indexed: 12/15/2022] Open
Abstract
Background The recurrence of the urinary tract infections (UTI), following the antibiotic treatments suggests the pathogen’s resistance to conventional antibiotics. This calls for the exploration of an alternative therapy. Main body The anti-uropathogenic and bactericidal activity of many plant extracts was reported by many researchers, which involves only preliminary antibacterial studies using different basic techniques like disk diffusion, agar well diffusion, or minimum inhibitory concentration (MIC) of the crude plant extracts, but reports on the specific action of the phytoconstituents against uropathogens are limited. Vaccinium macrocarpon Aiton (cranberry) is the best-studied home remedy for UTI. Some evidences suggest that proanthocyanins present in cranberry, prevent bacteria from adhering to the walls of the urinary tract, subsequently blocking the further steps of uropathogenesis. Probiotics such as Lactobacillus and Bifidobacterium are beneficial microorganisms that may act by the competitive exclusion principle to defend against infections in the urogenital tracts. Reports on potential vaccine agents and antibodies targeting the different toxins and effecter proteins are still obscure except uropathogenic E. coli. Conclusion This review highlights some of the medicinal herbs used by aborigines to prevent or treat acute or chronic urinary tract infections, botanicals with established urobactericidal activity, clinical trials undertaken to compare the efficacy of cranberry products in UTI prevention, and other natural therapeutics reported for UTI.
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Affiliation(s)
- Sarita Das
- Department of Botany, Berhampur University, Bhanja Bihar, Berhampur, Orissa 760007 India
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Loubet P, Ranfaing J, Dinh A, Dunyach-Remy C, Bernard L, Bruyère F, Lavigne JP, Sotto A. Alternative Therapeutic Options to Antibiotics for the Treatment of Urinary Tract Infections. Front Microbiol 2020; 11:1509. [PMID: 32719668 PMCID: PMC7350282 DOI: 10.3389/fmicb.2020.01509] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Accepted: 06/10/2020] [Indexed: 12/29/2022] Open
Abstract
Urinary tract infections (UTIs) mainly caused by Uropathogenic Escherichia coli (UPEC), are common bacterial infections. Many individuals suffer from chronically recurring UTIs, sometimes requiring long-term prophylactic antibiotic regimens. The global emergence of multi-drug resistant uropathogens in the last decade underlines the need for alternative non-antibiotic therapeutic and preventative strategies against UTIs. The research on non-antibiotic therapeutic options in UTIs has focused on the following phases of the pathogenesis: colonization, adherence of pathogens to uroepithelial cell receptors and invasion. In this review, we discuss vaccines, small compounds, nutraceuticals, immunomodulating agents, probiotics and bacteriophages, highlighting the challenges each of these approaches face. Most of these treatments show interesting but only preliminary results. Lactobacillus-containing products and cranberry products in conjunction with propolis have shown the most robust results to date and appear to be the most promising new alternative to currently used antibiotics. Larger efficacy clinical trials as well as studies on the interplay between non-antibiotic therapies, uropathogens and the host immune system are warranted.
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Affiliation(s)
- Paul Loubet
- VBMI, INSERM U1047, Université de Montpellier, Service des Maladies Infectieuses et Tropicales, CHU Nîmes, Nîmes, France
| | - Jérémy Ranfaing
- VBMI, INSERM U1047, Université de Montpellier, Service de Microbiologie et Hygiène Hospitalière, CHU Nîmes, Nîmes, France
| | - Aurélien Dinh
- Service des Maladies Infectieuses, AP-HP Raymond-Poincaré, Garches, France
| | - Catherine Dunyach-Remy
- VBMI, INSERM U1047, Université de Montpellier, Service de Microbiologie et Hygiène Hospitalière, CHU Nîmes, Nîmes, France
| | - Louis Bernard
- PRES Centre Val de Loire, Université François Rabelais de Tours, Tours, France.,Service des Maladies Infectieuses, CHU Tours, Tours, France
| | - Franck Bruyère
- PRES Centre Val de Loire, Université François Rabelais de Tours, Tours, France.,Service d'Urologie, CHU Tours, Tours, France
| | - Jean-Philippe Lavigne
- VBMI, INSERM U1047, Université de Montpellier, Service de Microbiologie et Hygiène Hospitalière, CHU Nîmes, Nîmes, France
| | - Albert Sotto
- VBMI, INSERM U1047, Université de Montpellier, Service des Maladies Infectieuses et Tropicales, CHU Nîmes, Nîmes, France
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10
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Zhu M, Wang S, Zhu Y, Wang Z, Zhao M, Chen D, Zhou C. Behavioral and dietary risk factors of recurrent urinary tract infection in Chinese postmenopausal women: a case-control study. J Int Med Res 2020; 48:300060519889448. [PMID: 31840544 PMCID: PMC7783248 DOI: 10.1177/0300060519889448] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2019] [Accepted: 10/29/2019] [Indexed: 01/11/2023] Open
Abstract
OBJECTIVE The present study aimed to examine the behavioral and dietary risk factors of recurrent urinary tract infection (RUTI) in postmenopausal patients in China. METHODS We performed a population-based case-control study with 193 postmenopausal women with RUTI and 193 age-matched healthy female controls with no history of RUTI. The study was conducted between January 2016 and June 2018 in Changzhou, China. Data were collected using an interviewer-based questionnaire, including information on demographics, lifestyle behavior, and habitual diet. Conditional logistic regression analysis was conducted to examine the risk factors associated with RUTI. RESULTS Wiping from back to front after toilet use, sedentary behavior >6 hours/day, delayed voiding, and chronic constipation were associated with an increased risk of RUTI. Drinking more than three cups of green tea per month showed an inverse association with RUTI. However, there was no evidence of dose dependency for overall consumption. Additionally, the three-cup association involved a small proportion of cases and may reflect statistical artifact. CONCLUSIONS Wiping from back to front after toilet use, sedentary behavior, delayed voiding, and chronic constipation are associated with an increased risk of RUTI in postmenopausal women.
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Affiliation(s)
- Meifeng Zhu
- Department of Nephrology, Changzhou Affiliated Hospital of
Nanjing University of Chinese Medicine, Changzhou, Jiangsu, China
- Department of Febrile Disease, Basic Medicine College, Nanjing
University of Chinese Medicine, Nanjing, Jiangsu, China
| | - Shenju Wang
- Department of Nephrology, Changzhou Affiliated Hospital of
Nanjing University of Chinese Medicine, Changzhou, Jiangsu, China
| | - Ying Zhu
- Department of Nephrology, Changshu Hospital Affiliated to
Nanjing University of Chinese Medicine, Changshu, Jiangsu, China
| | - Zhixia Wang
- Department of Obstetrics and Gynecology, The Affiliated BenQ
Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Min Zhao
- Department of Nephrology, Changzhou Affiliated Hospital of
Nanjing University of Chinese Medicine, Changzhou, Jiangsu, China
| | - Dai Chen
- Department of Nephrology, Changzhou Affiliated Hospital of
Nanjing University of Chinese Medicine, Changzhou, Jiangsu, China
| | - Chunxiang Zhou
- Department of Febrile Disease, Basic Medicine College, Nanjing
University of Chinese Medicine, Nanjing, Jiangsu, China
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Özgür E, Topçu AA, Yılmaz E, Denizli A. Surface plasmon resonance based biomimetic sensor for urinary tract infections. Talanta 2020; 212:120778. [PMID: 32113541 DOI: 10.1016/j.talanta.2020.120778] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2019] [Revised: 01/17/2020] [Accepted: 01/22/2020] [Indexed: 02/08/2023]
Abstract
Tailor-made Escherichia coli (E. coli) receptors were created with microcontact imprinted technique and binding events of E. coli were carried out by a surface plasmon resonance (SPR) sensor in aqueous solution and in urine mimic in real time and label-free. N-methacryloyl-(l)-histidine methyl ester (MAH) was selected as a functional monomer to design tailor-made E. coli receptors on the polymeric film and during the formation of the polymeric film on a chip surface, Ag nanoparticles (AgNPs) were entrapped into the polymer mixture in order to lower the detection limit of biomimetic SPR based sensor. The polymeric film was characterized with atomic force microscopy (AFM), scanning electron microscopy (SEM), ellipsometer and contact angle measurements. Limit of detection (LOD) was found 0.57 CFU/mL and feasibility of the biomimetic sensor was investigated in urine mimic.
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Affiliation(s)
- Erdoğan Özgür
- Advanced Technologies Application and Research Center, Hacettepe University, Ankara, Turkey
| | | | - Erkut Yılmaz
- Department of Molecular Biology and Biotechnology, Aksaray University, Aksaray, Turkey
| | - Adil Denizli
- Department of Chemistry, Hacettepe University, Ankara, Turkey.
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Shelf-life of shucked oyster in epigallocatechin-3-gallate with slightly acidic electrolyzed water washing under refrigeration temperature. Lebensm Wiss Technol 2020. [DOI: 10.1016/j.lwt.2019.108733] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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13
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Kiss T, Timár Z, Szabó A, Lukács A, Velky V, Oszlánczi G, Horváth E, Takács I, Zupkó I, Csupor D. Effect of green tea on the gastrointestinal absorption of amoxicillin in rats. BMC Pharmacol Toxicol 2019; 20:54. [PMID: 31470904 PMCID: PMC6717353 DOI: 10.1186/s40360-019-0332-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2019] [Accepted: 08/23/2019] [Indexed: 12/25/2022] Open
Abstract
BACKGROUND The investigation of food-drug and plant-drug interactions has become increasingly important. In case of antibiotics, it is essential to achieve and maintain a plasma concentration sufficient for the antimicrobial action. Although, on theoretical basis, the interaction of polyphenols and antibiotics may be hypothesized, experimental data are lacking to assess its clinical relevance. The aim of our study was to assess the interaction between one of the most widely used antibiotics, amoxicillin, and green tea, the most frequently consumed drink with high polyphenol content. METHODS The effects of green tea on the plasma level of amoxicillin was studied in an in vivo experiment in rats. The plasma level of amoxicillin was monitored by LC-MS/MS for 240 min after oral administration. The polyphenol content of green tea was determined by the Folin-Ciocalteu method. RESULTS The peak plasma concentration of amoxicillin significantly decreased upon its co-administration with green tea, although the AUC0-240 of the antibiotic did not decrease significantly in the group treated with amoxicillin suspended in green tea. CONCLUSIONS Our results suggest a potentially relevant interaction between green tea and amoxicillin, worth being further studied in humans.
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Affiliation(s)
- Tivadar Kiss
- Department of Pharmacognosy, Faculty of Pharmacy, University of Szeged, Eötvös utca 6, Szeged, H-6720 Hungary
- Interdisciplinary Centre for Natural Products, University of Szeged, Eötvös utca 6, Szeged, H-6720 Hungary
| | - Zoltán Timár
- SOLVO Biotechnology, Közép Fasor 52, Szeged, H-6726 Hungary
| | - Andrea Szabó
- Interdisciplinary Centre for Natural Products, University of Szeged, Eötvös utca 6, Szeged, H-6720 Hungary
- Department of Public Health, Faculty of Medicine, University of Szeged, Dóm tér 10, Szeged, H-6720 Hungary
| | - Anita Lukács
- Interdisciplinary Centre for Natural Products, University of Szeged, Eötvös utca 6, Szeged, H-6720 Hungary
- Department of Public Health, Faculty of Medicine, University of Szeged, Dóm tér 10, Szeged, H-6720 Hungary
| | - Viktória Velky
- SOLVO Biotechnology, Közép Fasor 52, Szeged, H-6726 Hungary
| | - Gábor Oszlánczi
- Interdisciplinary Centre for Natural Products, University of Szeged, Eötvös utca 6, Szeged, H-6720 Hungary
- Department of Public Health, Faculty of Medicine, University of Szeged, Dóm tér 10, Szeged, H-6720 Hungary
| | - Edina Horváth
- Department of Public Health, Faculty of Medicine, University of Szeged, Dóm tér 10, Szeged, H-6720 Hungary
| | - István Takács
- Department of Pharmacognosy, Faculty of Pharmacy, University of Szeged, Eötvös utca 6, Szeged, H-6720 Hungary
| | - István Zupkó
- Interdisciplinary Centre for Natural Products, University of Szeged, Eötvös utca 6, Szeged, H-6720 Hungary
- Department of Pharmacodynamics and Biopharmacy, University of Szeged, Eötvös utca 6, Szeged, H-6720 Hungary
| | - Dezső Csupor
- Department of Pharmacognosy, Faculty of Pharmacy, University of Szeged, Eötvös utca 6, Szeged, H-6720 Hungary
- Interdisciplinary Centre for Natural Products, University of Szeged, Eötvös utca 6, Szeged, H-6720 Hungary
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Kheirabadi Z, Mehrabani M, Sarafzadeh F, Dabaghzadeh F, Ahmadinia N. Green tea as an adjunctive therapy for treatment of acute uncomplicated cystitis in women: A randomized clinical trial. Complement Ther Clin Pract 2018; 34:13-16. [PMID: 30712716 DOI: 10.1016/j.ctcp.2018.10.018] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Revised: 10/18/2018] [Accepted: 10/28/2018] [Indexed: 01/30/2023]
Abstract
BACKGROUND and purpose: Different in vitro studies have reported the antimicrobial effects of green tea catechins and also their synergistic effects with trimethoprim-sulfamethoxazole against E. coli. The aim of the present study was to evaluate the efficacy of green tea as an adjunctive therapy to standard antimicrobial treatment in women with acute uncomplicated cystitis. MATERIALS AND METHODS In this blinded randomized trial, 70 patients were assigned to receive four 500 mg capsules of green tea or starch as placebo daily for three days along with trimethoprim-sulfamethoxazole. The presence of acute uncomplicated cystitis symptoms was recorded and urinalysis was performed. RESULTS Women in the green tea group showed a statistically significant decrease in the prevalence of cystitis symptoms and a statistically significant improvement in the urinalysis results except for hematuria after 3 days of treatment. CONCLUSION Green tea was an effective adjunct to trimethoprim-sulfamethoxazole to treat acute uncomplicated cystitis in women.
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Affiliation(s)
- Zahra Kheirabadi
- Herbal and Traditional Medicines Research Center, Kerman University of Medical Sciences, Kerman, Iran
| | - Mitra Mehrabani
- Herbal and Traditional Medicines Research Center, Kerman University of Medical Sciences, Kerman, Iran
| | - Farhad Sarafzadeh
- Tropical and Infectious Diseases Research Center, Faculty of Medicine, Kerman University of Medical Sciences, Kerman, Iran
| | - Fatemeh Dabaghzadeh
- Herbal and Traditional Medicines Research Center, Kerman University of Medical Sciences, Kerman, Iran; Department of Clinical Pharmacy, Faculty of Pharmacy, Kerman University of Medical Sciences, Kerman, Iran.
| | - Negar Ahmadinia
- Herbal and Traditional Medicines Research Center, Kerman University of Medical Sciences, Kerman, Iran
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15
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Yang J, Tang CB, Xiao J, Du WF, Li R. Influences of epigallocatechin gallate and citric acid on Escherichia coli O157:H7 toxin gene expression and virulence-associated stress response. Lett Appl Microbiol 2018; 67:435-441. [PMID: 30066955 DOI: 10.1111/lam.13058] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Revised: 07/29/2018] [Accepted: 07/30/2018] [Indexed: 01/22/2023]
Abstract
Citric acid and EGCG at their minimum inhibitory concentrations were tested in this study. Logarithmic phase cells of Escherichia coli O157:H7 (ATCC 43895) were exposed to EGCG and citric acid respectively. The results of RT-real time PCR showed that both EGCG and citric acid increased stx2 and oxyR expression and decreased stx1, recA and Q expression. The result of Western blotting for RecA protein further indicated that both EGCG and citric acid decreased RecA production. Both EGCG and citric acid increased the level of intracellular reactive oxygen species and H2 O2 production and decreased superoxide dismutase activity. Therefore, EGCG and citric acid might induce stx2 production by increasing oxidative stress response and inhibit stx1 production by suppressing SOS response. In our study, the differential effects of the two antimicrobials were observed. EGCG reduced ompC and rpoS expression. However, citric acid caused an increase in ompC and rpoS expression. Membrane permeability is associated with toxin release. Citric acid increased the outer membrane permeability of E. coli O157:H7. However, the outer membrane of E. coli O157:H7 remained unaffected by EGCG. SIGNIFICANCE AND IMPACT OF THE STUDY Shiga toxins are the major virulence factors of Escherichia coli O157:H7. The use of antimicrobials triggering Shiga toxin production is controversial. (-)-epigallocatechin-3-gallate (EGCG) citric acid are often used singly or in combination to prevent micro-organisms in some food products. This study evaluated toxin induction in E. coli O157:H7 in response to EGCG and citric acid and investigated the potential mechanism of action. The findings may contribute to the proper use of EGCG and citric acid as antimicrobials.
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Affiliation(s)
- J Yang
- College of Biological and Pharmaceutical Engineering, Wuhan Polytechnic University, Wuhan, China
| | - C B Tang
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - J Xiao
- College of Biological and Pharmaceutical Engineering, Wuhan Polytechnic University, Wuhan, China
| | - W F Du
- College of Biological and Pharmaceutical Engineering, Wuhan Polytechnic University, Wuhan, China
| | - R Li
- College of Biological and Pharmaceutical Engineering, Wuhan Polytechnic University, Wuhan, China
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Yang D, Zhou H, Dina NE, Haisch C. Portable bacteria-capturing chip for direct surface-enhanced Raman scattering identification of urinary tract infection pathogens. ROYAL SOCIETY OPEN SCIENCE 2018; 5:180955. [PMID: 30839718 PMCID: PMC6170559 DOI: 10.1098/rsos.180955] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2018] [Accepted: 08/03/2018] [Indexed: 05/04/2023]
Abstract
Acute urinary tract infections (UTIs) are one of the most common nosocomial bacterial infections, which affect almost 50% of the population at least once in their lifetime. UTIs may lead to lethal consequences if they are left undiagnosed and not properly treated. Early, rapid and accurate uropathogens detection methods play a pivotal role in clinical process. In this work, a portable bacteria-grasping surface-enhanced Raman scattering (SERS) chip for identification of three species of uropathogens (Escherichia coli CFT 073, Pseudomonas aeruginosa PAO1 and Proteus mirabilis PRM1) directly from culture matrix was reported. The chip was firstly modified with a positively charged NH3 + group, which enables itself grasp the negatively charged bacterial cells through the electrostatic adsorption principle. After the bacterial cells were captured by the chip, concentrated Ag nanoparticles (NPs) were used to obtain their Raman fingerprint spectra with recognizable characteristic peaks and good reproducibility. With the help of chemometric method such as discriminant analysis (DA), the SERS-based chip allows a rapid, successful identification of three species of UTI bacteria with a minimal bacterial concentration (105 cells ml-1) required for clinical diagnostics. In addition, this chip could spot the bacterial SERS fingerprints information directly from LB culture medium and artificial urine without sample pre-treatment. The portable bacteria-grasping SERS-based chip provides a possibility for fast and easy detection of uropathogens, and viability of future development in healthcare applications.
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Affiliation(s)
- Danting Yang
- Department of Preventative Medicine, Zhejiang Provincial Key Laboratory of Pathological and Physiological Technology, Medical School of Ningbo University, 818 Fenghua Road, Ningbo, Zhejiang Province 315211, People's Republic of China
| | - Haibo Zhou
- Department of Pharmacy and Guangdong Province Key Laboratory of Pharmacodynamic of Traditional Chinese Medicine and New Drug Research, Jinan University, Guangzhou, Guangdong Province 510632, People's Republic of China
| | - Nicoleta E. Dina
- Department of Molecular and Biomolecular Physics, National Institute of R&D of Isotopic and Molecular Technologies, 67-103 Donat, 400293 Cluj-Napoca, Romania
| | - Christoph Haisch
- Chair for Analytical Chemistry, Institute of Hydrochemistry, Technische Universität München, Marchioninistrasse 17, 81377 Munich, Germany
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Green Tea Catechins: Their Use in Treating and Preventing Infectious Diseases. BIOMED RESEARCH INTERNATIONAL 2018; 2018:9105261. [PMID: 30105263 PMCID: PMC6076941 DOI: 10.1155/2018/9105261] [Citation(s) in RCA: 133] [Impact Index Per Article: 22.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Accepted: 06/10/2018] [Indexed: 12/19/2022]
Abstract
Green tea is one of the most popular drinks consumed worldwide. Produced mainly in Asian countries from the leaves of the Camellia sinensis plant, the potential health benefits have been widely studied. Recently, researchers have studied the ability of green tea to eradicate infectious agents and the ability to actually prevent infections. The important components in green tea that show antimicrobial properties are the catechins. The four main catechins that occur in green tea are (-)-epicatechin (EC), (-)-epicatechin-3-gallate (ECG), (-)-epigallocatechin (EGC), and (-)-epigallocatechin-3-gallate (EGCG). Of these catechins, EGCG and EGC are found in the highest amounts in green tea and have been the subject of most of the studies. These catechins have been shown to demonstrate a variety of antimicrobial properties, both to organisms affected and in mechanisms used. Consumption of green tea has been shown to distribute these compounds and/or their metabolites throughout the body, which allows for not only the possibility of treatment of infections but also the prevention of infections.
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Carrageta DF, Dias TR, Alves MG, Oliveira PF, Monteiro MP, Silva BM. Anti-obesity potential of natural methylxanthines. J Funct Foods 2018. [DOI: 10.1016/j.jff.2018.02.001] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
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19
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Saeed M, Naveed M, Arif M, Kakar MU, Manzoor R, Abd El-Hack ME, Alagawany M, Tiwari R, Khandia R, Munjal A, Karthik K, Dhama K, Iqbal HMN, Dadar M, Sun C. Green tea (Camellia sinensis) and l-theanine: Medicinal values and beneficial applications in humans-A comprehensive review. Biomed Pharmacother 2017; 95:1260-1275. [PMID: 28938517 DOI: 10.1016/j.biopha.2017.09.024] [Citation(s) in RCA: 104] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2017] [Revised: 09/03/2017] [Accepted: 09/06/2017] [Indexed: 02/05/2023] Open
Abstract
Green tea (Camellia sinensis) is a famous herb, and its extract has been extensively used in traditional Chinese medicinal system. In this context, several studies have revealed its health benefits and medicinal potentialities for several ailments. With ever increasing scientific knowledge, search for safer, potential and novel type of health-related supplements quest, scientists are re-directing their research interests to explore natural resources i.e. medicinal herbs/plant derived compounds. Green tea consumption has gained a special attention and popularity in the modern era of changing lifestyle. The present review is aimed to extend the current knowledge by highlighting the importance and beneficial applications of green tea in humans for safeguarding various health issues. Herein, we have extensively reviewed, analyzed, and compiled salient information on green tea from the authentic published literature available in PubMed and other scientific databases. Scientific literature evidenced that owing to the bioactive constituents including caffeine, l-theanine, polyphenols/flavonoids and other potent molecules, green tea has many pharmacological and physiological functions. It possesses multi-beneficial applications in treating various disorders of humans. This review also provides in-depth insights on the medicinal values of green tea which will be useful for researchers, medical professionals, veterinarians, nutritionists, pharmacists and pharmaceutical industry. Future research emphasis and promotional avenues are needed to explore its potential therapeutic applications for designing appropriate pharmaceuticals, complementary medicines, and effective drugs as well as popularize and propagate its multidimensional health benefits.
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Affiliation(s)
- Muhammad Saeed
- College of Animal Science and Technology, NW A&F University, Yangling, Shaanxi, 712100, China; Institute of Animal Sciences, Faculty of Animal Husbandry, University of Agriculture, Faisalabad, 38040, Pakistan
| | - Muhammad Naveed
- Department of Clinical Pharmacy, School of Basic Medicine, and Clinical Pharmacy, China Pharmaceutical University, Nanjing, Jiangsu Province, 211198, China; Department of Urology Surgery, Aviation General Hospital, Beijing, 100012, China
| | - Muhammad Arif
- Department of Animal Sciences, University College of Agriculture, University of Sargodha, 40100, Pakistan
| | - Mohib Ullah Kakar
- Faculty of Marine Sciences, Lasbela University of Agriculture, Water and Marine Sciences, Uthal, Balochistan, 3800, Pakistan
| | - Robina Manzoor
- Faculty of Marine Sciences, Lasbela University of Agriculture, Water and Marine Sciences, Uthal, Balochistan, 3800, Pakistan
| | | | - Mahmoud Alagawany
- Poultry Department, Faculty of Agriculture, Zagazig University, Zagazig 44511, Egypt.
| | - Ruchi Tiwari
- Department of Veterinary Microbiology and Immunology, College of Veterinary Sciences, UP Pandit Deen Dayal Upadhayay Pashu Chikitsa Vigyan Vishwavidyalay Evum Go-Anusandhan Sansthan (DUVASU), Mathura, Uttar Pradesh, 281 001, India
| | - Rekha Khandia
- Department of Biochemistry and Genetics, Barkatullah University, Bhopal, 462 026 M.P., India
| | - Ashok Munjal
- Department of Biochemistry and Genetics, Barkatullah University, Bhopal, 462 026 M.P., India
| | - Kumaragurubaran Karthik
- Central University Laboratory, Tamil Nadu Veterinary and Animal Sciences University, Madhavaram Milk Colony, Chennai, Tamil Nadu, 600051, India
| | - Kuldeep Dhama
- Division of Pathology, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly, 243 122, Uttar Pradesh, India
| | - Hafiz M N Iqbal
- Tecnologico de Monterrey, School of Engineering and Sciences, Campus Monterrey, Ave. Eugenio Garza Sada 2501, Monterrey, N.L., CP 64849, Mexico
| | - Maryam Dadar
- Razi Vaccine and Serum Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran
| | - Chao Sun
- College of Animal Science and Technology, NW A&F University, Yangling, Shaanxi, 712100, China.
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Bajpai VK, Shukla S, Paek WK, Lim J, Kumar P, Kumar P, Na M. Efficacy of (+)-Lariciresinol to Control Bacterial Growth of Staphylococcus aureus and Escherichia coli O157:H7. Front Microbiol 2017; 8:804. [PMID: 28515721 PMCID: PMC5413575 DOI: 10.3389/fmicb.2017.00804] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2017] [Accepted: 04/19/2017] [Indexed: 11/13/2022] Open
Abstract
This study was undertaken to assess the antibacterial potential of a polyphenolic compound (+)-lariciresinol isolated from Rubia philippinensis against selected foodborne pathogens Staphylococcus aureus KCTC1621 and Escherichia coli O157:H7. (+)-Lariciresinol at the tested concentrations (250 μg/disk) evoked a significant antibacterial effect as a diameter of inhibition zones (12.1-14.9 mm) with minimum inhibitory concentration (MIC), and minimum bactericidal concentration values of 125-250 and 125-250 μg/mL, respectively. Furthermore, (+)-lariciresinol at MIC showed reduction in bacterial cell viabilities, efflux of potassium (K+) ions and release of 260 nm materials against E. coli O157:H7 and S. aureus KCTC1621. Moreover, deteriorated cell wall morphology of E. coli O157:H7 and S. aureus KCTC1621 cells treated with (+)-lariciresinol at MIC further confirmed its inhibitory effect against the tested pathogens, suggesting it to be an alternative means of antimicrobials.
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Affiliation(s)
- Vivek K Bajpai
- Department of Applied Microbiology and Biotechnology, Microbiome Laboratory, Yeungnam UniversityGyeongsan, South Korea
| | - Shruti Shukla
- Department of Energy and Materials Engineering, Dongguk University, SeoulSeoul, South Korea
| | - Woon K Paek
- National Science Museum, Ministry of Science, ICT and Future PlanningDaejeon, South Korea
| | - Jeongheui Lim
- National Science Museum, Ministry of Science, ICT and Future PlanningDaejeon, South Korea
| | - Pradeep Kumar
- Department of Forestry, North Eastern Regional Institute of Science and TechnologyNirjuli, India
| | - Pankaj Kumar
- Department of Microbiology, Dolphin (PG) College of Science & AgricultureFatehgarh Sahib, India
| | - MinKyun Na
- College of Pharmacy, Chungnam National UniversityDaejeon, South Korea
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Sabry Othm A, Abbas Ahme N. Antibacterial Effect of the Ethanol Leaves Extract of Moringa oleifera and Camellia sinensis against Multi Drug Resistant Bacteria. INT J PHARMACOL 2017. [DOI: 10.3923/ijp.2017.156.165] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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22
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Mena P, González de Llano D, Brindani N, Esteban-Fernández A, Curti C, Moreno-Arribas MV, Del Rio D, Bartolomé B. 5-(3′,4′-Dihydroxyphenyl)-γ-valerolactone and its sulphate conjugates, representative circulating metabolites of flavan-3-ols, exhibit anti-adhesive activity against uropathogenic Escherichia coli in bladder epithelial cells. J Funct Foods 2017. [DOI: 10.1016/j.jff.2016.12.035] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
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23
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Zhou H, Yang M, Hou S, Deng L. Mesoporous hydroxyapatite nanoparticles hydrothermally synthesized in aqueous solution with hexametaphosphate and tea polyphenols. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 71:439-445. [DOI: 10.1016/j.msec.2016.10.040] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2016] [Revised: 09/20/2016] [Accepted: 10/18/2016] [Indexed: 10/20/2022]
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24
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Mazzio EA, Li N, Bauer D, Mendonca P, Taka E, Darb M, Thomas L, Williams H, Soliman KFA. Natural product HTP screening for antibacterial (E.coli 0157:H7) and anti-inflammatory agents in (LPS from E. coli O111:B4) activated macrophages and microglial cells; focus on sepsis. BMC COMPLEMENTARY AND ALTERNATIVE MEDICINE 2016; 16:467. [PMID: 27846826 PMCID: PMC5111180 DOI: 10.1186/s12906-016-1429-x] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/24/2016] [Accepted: 10/29/2016] [Indexed: 11/13/2022]
Abstract
Background Acute systemic inflammatory response syndrome arising from infection can lead to multiple organ failure and death, with greater susceptibility occurring in immunocompromised individuals. Moreover, sub-acute chronic inflammation is a contributor to the pathology of diverse degenerative diseases (Parkinson’s disease, Alzheimer’s disease and arthritis). Given the known limitations in Western medicine to treat a broad range of inflammatory related illness as well as the emergence of antibiotic resistance, there is a renewed interest in complementary and alternative medicines (CAMs) to achieve these means. Methods A high throughput (HTP) screening of >1400 commonly sold natural products (bulk herbs, cooking spices, teas, leaves, supplement components, nutraceutical food components, fruit and vegetables, rinds, seeds, polyphenolics etc.) was conducted to elucidate anti-inflammatory substances in lipopolysaccharide (LPS) (E. coli serotype O111:B4) monocytes: RAW 264.7 macrophages [peripheral], BV-2 microglia [brain]) relative to hydrocortisone, dexamethasone and L-N6-(1Iminoethyl)lysine (L-NIL). HTP evaluation was also carried out for lethal kill curves against E.coli 0157:H7 1x106 CFU/mL relative to penicillin. Validation studies were performed to assess cytokine profiling using antibody arrays. Findings were corroborated by independent ELISAs and NO2–/iNOS expression quantified using the Griess Reagent and immunocytochemistry, respectively. For robust screening, we developed an in-vitro efficacy paradigm to ensure anti-inflammatory parameters were observed independent of cytotoxicity. This caution was taken given that many plants exert tumoricidal and anti-inflammatory effects at close range through similar signaling pathways, which could lead to false positives. Results The data show that activated BV-2 microglia cells (+ LPS 1μg/ml) release >10-fold greater IL-6, MIP1/2, RANTES and nitric oxide (NO2–), where RAW 264.7 macrophages (+ LPS 1μg/ml) produced > 10-fold rise in sTNFR2, MCP-1, IL-6, GCSF, RANTES and NO2–. Data validation studies establish hydrocortisone and dexamethasone as suppressing multiple pro-inflammatory processes, where L-NIL suppressed NO2–, but had no effect on iNOS expression or IL-6. The screening results demonstrate relative few valid hits with anti-inflammatory effects at < 250μg/ml for the following: Bay Leaf (Laurus nobilis), Elecampagne Root (Inula helenium), Tansy (Tanacetum vulgare),Yerba (Eriodictyon californicum) and Centipeda (Centipeda minima), Ashwagandha (Withania somnifera), Feverfew (Tanacetum parthenium), Rosemary (Rosmarinus officinalis), Turmeric Root (Curcuma Longa), Osha Root (Ligusticum porteri), Green Tea (Camellia sinensis) and constituents: cardamonin, apigenin, quercetin, biochanin A, eupatorin, (-)-epigallocatechin gallate (EGCG) and butein. Natural products lethal against [E. coli 0157:H7] where the LC50 < 100 μg/ml included bioactive silver hydrosol-Argentyn 23, green tea (its constituents EGCG > Polyphenon 60 > (-)-Gallocatechin > Epicatechin > (+)-Catechin), Grapeseed Extract (Vitis vinifera), Chinese Gallnut (its constituents gallic acid > caffeic acid) and gallic acid containing plants such as Babul Chall Bark (Acacia Arabica), Arjun (Terminalia Arjuna) and Bayberry Root Bark (Morella Cerifera). Conclusions These findings emphasize and validate the previous work of others and identify the most effective CAM anti-inflammatory, antibacterial compounds using these models. Future work will be required to evaluate potential combination strategies for long-term use to prevent chronic inflammation and possibly lower the risk of sepsis in immunocompromised at risk populations.
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Hui X, Liu H, Tian FL, Li FF, Li H, Gao WY. Inhibition of green tea and the catechins against 1-deoxy-d-xylulose 5-phosphate reductoisomerase, the key enzyme of the MEP terpenoid biosynthetic pathway. Fitoterapia 2016; 113:80-4. [PMID: 27439219 DOI: 10.1016/j.fitote.2016.07.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Revised: 07/15/2016] [Accepted: 07/16/2016] [Indexed: 11/17/2022]
Abstract
1-Deoxy-d-xylulose 5-phosphate reductoisomerase (DXR) is the first committed enzyme in the MEP terpenoid biosynthetic pathway and also a validated antimicrobial target. Green tea which is rich in polyphenolic components such as the catechins, possesses a plenty of pharmacological activities, in particular an antibacterial effect. To uncover the antibacterial mechanism of green tea and to seek new DXR inhibitors from natural sources, the DXR inhibitory activity of green tea and its main antimicrobial catechins were investigated in this study. The results show that the raw extract of green tea and its ethyl acetate fraction are able to suppress DXR activity explicitly. Further determination of the DXR inhibitory capacity of eight catechin compounds demonstrates that the most active compound is gallocatechin gallate that is able to inhibit around 50% activity of DXR at 25μM. Based on these data, the primary structure-activity relationship of the catechins against DXR is discussed. This study would be very helpful to elucidate the antimicrobial mechanism of green tea and the catechins and also would be very useful to direct the rational utilization of them as food additives.
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Affiliation(s)
- Xian Hui
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, College of Life Sciences, Northwest University, 229 North Taibai Road, Xi'an, Shaanxi 710069, China
| | - Hui Liu
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, College of Life Sciences, Northwest University, 229 North Taibai Road, Xi'an, Shaanxi 710069, China
| | - Fang-Lin Tian
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, College of Life Sciences, Northwest University, 229 North Taibai Road, Xi'an, Shaanxi 710069, China
| | - Fei-Fei Li
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, College of Life Sciences, Northwest University, 229 North Taibai Road, Xi'an, Shaanxi 710069, China
| | - Heng Li
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, College of Life Sciences, Northwest University, 229 North Taibai Road, Xi'an, Shaanxi 710069, China
| | - Wen-Yun Gao
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, College of Life Sciences, Northwest University, 229 North Taibai Road, Xi'an, Shaanxi 710069, China.
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Kumar MS, Das AP. Molecular identification of multi drug resistant bacteria from urinary tract infected urine samples. Microb Pathog 2016; 98:37-44. [PMID: 27354209 DOI: 10.1016/j.micpath.2016.06.029] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Revised: 06/16/2016] [Accepted: 06/24/2016] [Indexed: 10/21/2022]
Abstract
Urinary tract infections (UTIs) are of great concern in both developing and developed countries all over the world. Even though the infections are more common in women and children, they are at a considerable rate in men and of all ages. The uropathogens causing the infections are spread through various routes. The treatment generally recommended by the physicians is antibiotic usage. But, most of the uropathogens have evolved antibiotic resistance mechanisms. This makes the present situation hectic in control and prevention of UTIs. The present study aims to illustrate the multidrug resistance patterns among isolated bacterial strains from infected urine samples in Odisha state, India. Four bacterial strains were isolated and identified as Proteus sp. SK3, Pseudomonas sp. ADMK77, Proteus sp. BLKB2 and Enterobacter hormaechei strain CW-3 by 16S rRNA gene sequencing. Phylogenetc analysis indicated the strains belong to three various genera namely, Proteus, Pseudomonas and Enterobacter. The evolutionary timeline of the bacteria was studied by constructing phylogenetic trees by Neighborhood Joining method. The presence of ESBL gene and biofilm forming capability were studied for the four strains. Antibiotic susceptibility patterns of the isolates were studied toward the commonly recommended antibiotics. Both the Proteus strains were found commonly susceptible to aminoglycoside and sulphonamide groups. Pseudomonas strain was found to be susceptible to cephems, aminoglycosides and fluoroquinolones. Enterobacter sp was found to be resistant to almost all antibiotic groups and susceptible to only sulphonamides group. The antibiotic susceptibility patterns of the bacteria help in choosing the empirical antibiotic treatment for UTI.
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Affiliation(s)
- M S Kumar
- Bioengineering & Biomineral Processing Laboratory, Centre of Biotechnology, Siksha O Anusandhan University, Khandagiri Square, Bhubaneswar, Odisha, India
| | - A P Das
- Bioengineering & Biomineral Processing Laboratory, Centre of Biotechnology, Siksha O Anusandhan University, Khandagiri Square, Bhubaneswar, Odisha, India.
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Kumar M, Ghosh S, Nayak S, Das A. Recent advances in biosensor based diagnosis of urinary tract infection. Biosens Bioelectron 2016; 80:497-510. [DOI: 10.1016/j.bios.2016.02.023] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2015] [Revised: 02/06/2016] [Accepted: 02/08/2016] [Indexed: 12/16/2022]
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Serra DO, Mika F, Richter AM, Hengge R. The green tea polyphenol EGCG inhibits E. coli biofilm formation by impairing amyloid curli fibre assembly and downregulating the biofilm regulator CsgD via the σ(E) -dependent sRNA RybB. Mol Microbiol 2016; 101:136-51. [PMID: 26992034 DOI: 10.1111/mmi.13379] [Citation(s) in RCA: 82] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/16/2016] [Indexed: 01/17/2023]
Abstract
In bacterial biofilms, which are often involved in chronic infections, cells are surrounded by a self-produced extracellular matrix that contains amyloid fibres, exopolysaccharides and other biopolymers. The matrix contributes to the pronounced resistance of biofilms against antibiotics and host immune systems. Being highly inflammatory, matrix amyloids such as curli fibres of Escherichia coli can also play a role in pathogenicity. Using macrocolony biofilms of commensal and pathogenic E. coli as a model system, we demonstrate here that the green tea polyphenol epigallocatachin gallate (EGCG) is a potent antibiofilm agent. EGCG virtually eliminates the biofilm matrix by directly interfering with the assembly of curli subunits into amyloid fibres, and by triggering the σ(E) cell envelope stress response and thereby reducing the expression of CsgD - a crucial activator of curli and cellulose biosynthesis - due to csgD mRNA targeting by the σ(E) -dependent sRNA RybB. These findings highlight EGCG as a potential adjuvant for antibiotic therapy of biofilm-associated infections. Moreover, EGCG may support therapies against pathogenic E. coli that produce inflammatory curli fibres along with Shigatoxin.
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Affiliation(s)
- Diego O Serra
- Institut für Biologie/Mikrobiologie, Humboldt-Universität zu Berlin, 10115, Berlin, Germany
| | - Franziska Mika
- Institut für Biologie/Mikrobiologie, Humboldt-Universität zu Berlin, 10115, Berlin, Germany
| | - Anja M Richter
- Institut für Biologie/Mikrobiologie, Humboldt-Universität zu Berlin, 10115, Berlin, Germany
| | - Regine Hengge
- Institut für Biologie/Mikrobiologie, Humboldt-Universität zu Berlin, 10115, Berlin, Germany
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Zacchè MM, Giarenis I. Therapies in early development for the treatment of urinary tract inflammation. Expert Opin Investig Drugs 2016; 25:531-40. [DOI: 10.1517/13543784.2016.1161024] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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30
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Sardari F, Hajisadeghi S. Comparison of the Antimicrobial Efficacy of Green Tea Extract With 1% Sodium Hypochlorite Against Enterococcus faecalis: An In Vitro Study. Jundishapur J Nat Pharm Prod 2016. [DOI: 10.17795/jjnpp-30944] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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31
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Gupta D, Dubey J, Kumar M. Phytochemical analysis and antimicrobial activity of some medicinal plants against selected common human pathogenic microorganisms. ASIAN PACIFIC JOURNAL OF TROPICAL DISEASE 2016. [DOI: 10.1016/s2222-1808(15)60978-1] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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