scholarly journals Anthocyanins in Blueberries Grown in Hot Climate Exert Strong Antioxidant Activity and May Be Effective against Urinary Tract Bacteria

Antioxidants ◽  
2020 ◽  
Vol 9 (6) ◽  
pp. 478 ◽  
Author(s):  
Ana B. Cerezo ◽  
Giorgiana M. Cătunescu ◽  
Mercedes Martínez-Pais González ◽  
Ruth Hornedo-Ortega ◽  
Carmen R. Pop ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Antibacterial Activity ◽  
Urinary Tract ◽  
High Performance ◽  
Hot Climate ◽  
Total Anthocyanins ◽  
Providencia Stuartii ◽  
Bioactive Potential ◽  
Tract Infections

Anthocyanins are extensively studied for their health-related properties, including antibacterial activity against urinary tract infections (UTI). Among common fruits, blueberries, with their remarkable antioxidant capacity, are one of the richest sources. Anthocyanin-rich extracts were obtained from four varieties: Snowchaser, Star, Stella Blue and Cristina Blue, grown in the hot climate of Southern Spain. Their total anthocyanins contents (TAC) were determined spectrophotometrically, and the anthocyanin profile by ultra high performance liquid chromatography—tandem mass spectrometer (UHPLC-MS/MS). Their antioxidant activity was assessed by oxygen radical absorbance capacity (ORAC) assay, while antibacterial activity against strains isolated from UTI patients was assessed in vitro, helping to select the varieties with the highest bioactive potential. Star showed the highest TAC and antioxidant activity (1663 ± 159 mg of cyanidin-3-O-glucoside (cy-3-O-glu) equivalents/100 g fresh weight (FW), 6345 ± 601 μmol Trolox equivalents (TE)/100 g FW, respectively), followed by Cristina Blue, Stella Blue and Snowchaser. As far as we know, this is the first time that cyanidin-3-rutinoside has been identified in blueberries. The extracts inhibited all the tested strains, MICs ranging from 0.4 mg/mL (for Stella Blue extract against UTI P. aeruginosa) to 9.5 mg/mL (for all extracts against UTI K. pneumoniae ssp. pneumoniae). This is the first study that assessed in vitro the antibacterial activity of blueberries against Klebsiella pneumoniae, Providencia stuartii and Micrococcus spp. strains isolated from UTI.

In Vitro antibacterial activity of lactic acid bacteria isolated from goat’s raw milk of Mostaganem (West Algeria) against Gram negative bacteria responsible for urinary tract infections

2016 ◽  
Vol 6 (1) ◽  
pp. 15-22
Author(s):  
Zergoug Amina ◽  
Cheriguene Abderrahim ◽  
Chougrani Fadela
Keyword(s):  
Antibacterial Activity ◽  
Lactic Acid ◽  
Urinary Tract ◽  
Lactic Acid Bacteria ◽  
Raw Milk ◽  
Gram Negative Bacteria ◽  
Gram Negative ◽  
Tract Infections ◽  
West Algeria

Urinary tract infections (UTI) are a serious bacterial pathological challenges all over the world, leading to respiratory infections, that’s why new strategies don’t cease to develop. Lactic acid bacteria having shown beneficial effects for years in various areas, may prove to be excellent candidates in medical field. The current research focused on the selection of lactic acid bacteria having the potential of an antibacterial activity against Gram negative bacteria responsible for UTI, for an eventual use as a therapeutic agent. A total of 40 isolates were isolated from goat’s raw milk of Mostaganem (West Algeria). In vitro tests were conducted in order to determine the efficiency of the isolates to produce antibacterial agents in interaction with uropathogens. Among 40 isolates, only 10 isolates identified as Lactobacilli and Lactococci were performant. The Screening showed that the inhibitor agent was proteinaceous substance. Therfore, it is noted that a treatment with presence of LAB is very encouraging as a result of the production of bacteriocin-like substance. On the other hand, LAB can be considered as a good alter-native to the large extent to the antibiotics in the treatment of UTI.

scholarly journals Antibacterial Activity of LCB10-0200 against Klebsiella pneumoniae

Antibiotics ◽  
2021 ◽  
Vol 10 (10) ◽  
pp. 1185
Author(s):  
Sang-Hun Oh ◽  
Young-Rok Kim ◽  
Hee-Soo Park ◽  
Kyu-Man Oh ◽  
Young-Lag Cho ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Urinary Tract ◽  
Klebsiella Pneumoniae ◽  
Urinary Tract Infections ◽  
Antibacterial Agent ◽  
In Vitro Susceptibility ◽  
In Vivo Models ◽  
Tract Infections

Klebsiella pneumoniae is one of the important clinical organisms that causes various infectious diseases, including urinary tract infections, necrotizing pneumonia, and surgical wound infections. The increase in the incidence of multidrug-resistance K. pneumoniae is a major problem in public healthcare. Therefore, a novel antibacterial agent is needed to treat this pathogen. Here, we studied the in vitro and in vivo activities of a novel antibiotic LCB10-0200, a siderophore-conjugated cephalosporin, against clinical isolates of K. pneumoniae. In vitro susceptibility study found that LCB10-0200 showed potent antibacterial activity against K. pneumoniae, including the beta-lactamase producing strains. The in vivo efficacy of LCB10-0200 was examined in three different mouse infection models, including systemic, thigh, and urinary tract infections. LCB10-0200 showed more potent in vivo activity than ceftazidime in the three in vivo models against the drug-susceptible and drug-resistant K. pneumoniae strains. Taken together, these results show that LCB10-0200 is a potential antibacterial agent to treat infection caused by K. pneumoniae.

scholarly journals Antioxidant Activity and Antibacterial Effects on Clinical IsolatedStreptococcus suisandStaphylococcus intermediusof Extracts from Several Parts ofCladogynos orientalisand Their Phytochemical Screenings

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Pongtip Sithisarn ◽  
Piyanuch Rojsanga ◽  
Patchima Sithisarn ◽  
Sumet Kongkiatpaiboon
Keyword(s):  
Antioxidant Activity ◽  
Antibacterial Activity ◽  
High Performance ◽  
Total Flavonoid ◽  
Diffusion Method ◽  
Total Phenolic ◽  
Leaf Extracts ◽  
Spectrophotometric Methods ◽  
Staphylococcus Intermedius

Thein vitroantioxidant and antibacterial assays against clinically isolatedStreptococcus suisandStaphylococcus intermediusof the extracts prepared by decoction and ethanolic reflux of different parts of Chettaphangki (Cladogynos orientalisZipp. ex Span), including the leaves, roots, and stems, using 1,1-diphenyl-2-picrylhydrazyl (DPPH) scavenging assay and disc diffusion method were conducted. Quantitative analysis of total phenolic and total flavonoid contents in the extracts using spectrophotometric methods was also performed. Finally, phytochemical screening by thin layer chromatography (TLC) and high performance liquid chromatography (HPLC) was conducted. Leaf ethanolic reflux extract (100 g) contained the highest total phenolic and total flavonoid contents of 7.21 ± 0.28 μg gallic acid equivalent (GAE) and 11.51 ± 2.02 μg rutin equivalent (RE), respectively. Chettaphangki extracts promoted low antioxidant activity with EC50values in the range of 0.27–0.48 mg/mL. Extracts and fractions from the roots and stems of this plant promoted low to intermediate antibacterial activity againstS. intermediuswith the inhibition zones between 7 and 14 mm. The chromatographic data suggested that the leaf extracts ofC. orientaliscontained rutin while the root and stem extracts contained scopoletin and chettaphanin I. Rutin promoted strong antioxidant activity while chettaphanin I showed low antibacterial activity againstStaphylococcus intermedius.

scholarly journals Neuroprotective and Antioxidant Enhancing Properties of Selective Equisetum Extracts

Molecules ◽  
2021 ◽  
Vol 26 (9) ◽  
pp. 2565
Author(s):  
Denisa Batir-Marin ◽  
Monica Boev ◽  
Oana Cioanca ◽  
Cornelia Mircea ◽  
Ana Flavia Burlec ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
High Performance ◽  
Chemical Characterization ◽  
Biological Action ◽  
Neuroprotective Activity ◽  
In Vitro Tests ◽  
Skin Conditions ◽  
Tract Infections

The sterile stems belonging to the Equisetum species are often used in traditional medicine of various nations, including Romanians. They are highly efficient in treating urinary tract infections, cardiovascular diseases, respiratory tract infections, and medical skin conditions due to their content of polyphenolic derivatives that have been isolated. In this regard, this study aimed to provide the chemical composition of the extracts obtained from the Equisetum species (E. pratense, E. sylvaticum, E. telmateia) and to investigate the biological action in vitro and in vivo. For the chemical characterization of the analyzed Equisetum species extracts, studies were performed by using ultra-high-performance liquid chromatography (UHPLC-DAD). In vitro evaluation of the antioxidant activity of the plant extracts obtained from these species of Equisetum genus was determined. The neuroprotective activity of these three ethanolic extracts from the Equisetum species using zebrafish tests was determined in vivo. All obtained results were statistically significant. The results indicate that E. sylvaticum extract has a significant antioxidant activity; whereas, E. pratense extract had anxiolytic and antidepressant effects significantly higher than the other two extracts used. All these determinations indicate promising results for the antioxidant in vitro tests and neuroprotective activity of in vivo tests, particularly mediated by their active principles.

scholarly journals Seeds extract of three Artocarpus species: Their in-vitro antibacterial activities against multidrug-resistant (MDR) Escherichia coli isolates from urinary tract infections (UTIs)

2021 ◽  
Vol 22 (10) ◽  
Author(s):  
Muhammad Evy Prastiyanto
Keyword(s):  
Antibacterial Activity ◽  
Urinary Tract ◽  
Urinary Tract Infections ◽  
Antibacterial Agents ◽  
Antibacterial Activities ◽  
Multidrug Resistant ◽  
E Coli ◽  
Tract Infections ◽  
Seed Extracts

Abstract. Prastiyanto ME. 2021. Seeds extract of three Artocarpus species: Their in-vitro antibacterial activities against multidrug-resistant (MDR) Escherichia coli isolates from urinary tract infections (UTIs). Biodiversitas 22: 4362-4368. Multidrug-resistant (MDR)-E. coli is a major cause and has become a very serious problem in urinary tract infections (UTIs). As a result, it requires an antibacterial agent derived from biological materials. It has been reported that the seeds of three species of Artocarpus (A. heterophyllous, A. champeden, and A. camansi) have antibacterial properties against Methicillin-Resistant Staphylococcus aureus (MRSA). However, there are three other Artocarpus species in Indonesia, i.e., keledang (A. lanceipolius), tarra (A. elasticus), and terap (A. Odoratissimus) whose antibacterial property has not been investigated. To minimize the research gap, this study aims to determine the antibacterial activity of seed extracts of A. lanceipolius, A. elasticus, and A. odoratissimus against MDR-E. coli isolates of UTIs. Antibacterial activity was evaluated using the agar well diffusion assay. The microdilution method was used to determine the minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) values. The results revealed that the seed extracts of A. lanceipolius, A. elasticus, and A. odoratissimus have the potential as antibacterial agents against MDR-E. coli isolate of UTIs. A. elasticus seed extract shows the widest zone of inhibition in the range of 7.0-13.3 mm and the smallest MIC and MBC values ??of 6.25-12.5 mg/mL and 12.5-25 mg/mL, respectively. In conclusion, A. lanceipolius, A. elasticus, and A. odoratissimus seed extracts have the potential to be developed as antibacterial agents against UTI-causing MDR-E. coli. Further in vivo research and determining the mode of action of antibacterial activity are needed.

scholarly journals Bacterial Microcompartment-Mediated Ethanolamine Metabolism inEscherichia coliUrinary Tract Infection

2019 ◽  
Vol 87 (8) ◽  
Author(s):  
Katherine Dadswell ◽  
Sinead Creagh ◽  
Edward McCullagh ◽  
Mingzhi Liang ◽  
Ian R. Brown ◽  
...  
Keyword(s):  
Urinary Tract ◽  
Carbon Source ◽  
High Performance ◽  
Urine Samples ◽  
Breakdown Product ◽  
Content Type ◽  
E Coli ◽  
Tract Infections

ABSTRACTUrinary tract infections (UTIs) are common and in general are caused by intestinal uropathogenicEscherichia coli(UPEC) ascending via the urethra. Microcompartment-mediated catabolism of ethanolamine, a host cell breakdown product, fuels the competitive overgrowth of intestinalE. coli, both pathogenic enterohemorrhagicE. coliand commensal strains. During a UTI, urease-negativeE. colibacteria thrive, despite the comparative nutrient limitation in urine. The role of ethanolamine as a potential nutrient source during UTIs is understudied. We evaluated the role of the metabolism of ethanolamine as a potential nitrogen and carbon source for UPEC in the urinary tract. We analyzed infected urine samples by culture, high-performance liquid chromatography, reverse transcription-quantitative PCR, and genomic sequencing. The ethanolamine concentration in urine was comparable to the concentration of the most abundant reported urinary amino acid,d-serine. Transcription of theeutoperon was detected in the majority of urine samples containingE. coliscreened. All sequenced UPEC strains had conservedeutoperons, while metabolic genotypes previously associated with UTI (dsdCXA,metE) were mainly limited to phylogroup B2.In vitroethanolamine was found to be utilized as a sole source of nitrogen by UPEC strains. The metabolism of ethanolamine in artificial urine medium (AUM) induced metabolosome formation and provided a growth advantage at the physiological levels found in urine. Interestingly,eutE(which encodes acetaldehyde dehydrogenase) was required for UPEC strains to utilize ethanolamine to gain a growth advantage in AUM, suggesting that ethanolamine is also utilized as a carbon source. These data suggest that urinary ethanolamine is a significant additional carbon and nitrogen source for infectingE. colistrains.

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