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https://www.readbyqxmd.com/read/29792919/seeing-the-light-shifting-from-wild-rhizomes-to-extraction-of-active-ingredients-from-above-ground-parts-of-paris-polyphylla-var-yunnanensis
#1
Xu-Jie Qin, Wei Ni, Chang-Xiang Chen, Hai-Yang Liu
ETHNOPHARMACOLOGICAL RELEVANCE: The dried rhizomes of Paris polyphylla var. yunnanensis are widely used in traditional Chinese medicine (TCM) as hemostatic, antitumor, and antimicrobial agents. More than 70 Chinese patent medicines are based on P. polyphylla var. yunnanensis rhizomes. Steroidal saponins are considered as the main active ingredients of these rhizomes. However, wild populations of P. polyphylla var. yunnanensis are greatly threatened due to the illegal wild harvest and over-utilization of the rhizomes...
May 21, 2018: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/29792153/antimicrobial-evaluation-of-erythrinan-alkaloids-from-erythrina-crista-galli-l
#2
Janaina M de Avila, Ionara I Dalcol, Alessandra O Pereira, Eveline W Santos, Adriano Ferraz, Maura Z Santos, Marco Aurelio Mostardeiro, Ademir F Morel
BACKGROUND: Several species of the genus Erythrina have been used as sedative, antidepressant, and anticonvulsant. Erythrina crista-galli is native to the Pampa Biome and is widely used for medicinal purposes. Erythrinan alkaloids exhibit a range of pharmacological properties. OBJECTIVE: The aim of this study was to evaluate the basic fractions and the alkaloids isolated from E. crista-galli bark against a collection of bacteria and fungi for the first time. METHODS: Erythrina crista-galli stem bark was extracted with MeOH under reflux...
May 23, 2018: Medicinal Chemistry
https://www.readbyqxmd.com/read/29790489/inhibitory-effect-of-hop-fractions-against-gram-positive-multi-resistant-bacteria-a-pilot-study
#3
Katerina Bogdanova, Milan Kolar, Katerina Langova, Martin Dusek, Alexandr Mikyska, Vanda Bostikova, Pavel Bostik, Jana Olsovska
AIM: Our research focused on the antimicrobial effects of purified hop (Humulus lupulus L.) fractions including α-bitter acids (humulones), β-bitter acids (lupulones) and xanthohumol, and a commercial CO2 hop extract of bitter acids against reference and multi-resistant strains of Gram-positive and Gram-negative bacteria and against selected yeast strains. METHODS: In vitro testing of antimicrobial activity was performed according to standard testing protocols (EUCAST)...
May 23, 2018: Biomedical Papers of the Medical Faculty of the University Palacký, Olomouc, Czechoslovakia
https://www.readbyqxmd.com/read/29790031/effect-of-selenium-containing-biocomposites-from-medicinal-mushrooms-on-the-potato-ring-rot-causative-agent
#4
A I Perfileva, O M Tsivileva, Ya B Drevko, D N Ibragimova, O V Koftin
The impact of selenium biocomposites obtained from the medicinal macrobasidiomycetes Ganoderma lucidum, Grifola umbellata, Laetiporus sulphureus, Lentinula edodes, and Pleurotus ostreatus on the viability and biofilm formation capability of the phytopathogenic Gram-positive bacterium Clavibacter michiganensis ssp. sepedonicus (Spieck. et Kotth.) (Cms) was studied. Impairment of bacterial cell viability resulting from their incubation with biocomposites was shown. The decisive role of the composites' selenium component on the biological activity under question was established...
March 2018: Doklady Biological Sciences: Proceedings of the Academy of Sciences of the USSR, Biological Sciences Sections
https://www.readbyqxmd.com/read/29788916/in-silico-exploration-of-red-sea-bacillus-genomes-for-natural-product-biosynthetic-gene-clusters
#5
Ghofran Othoum, Salim Bougouffa, Rozaimi Razali, Ameerah Bokhari, Soha Alamoudi, André Antunes, Xin Gao, Robert Hoehndorf, Stefan T Arold, Takashi Gojobori, Heribert Hirt, Ivan Mijakovic, Vladimir B Bajic, Feras F Lafi, Magbubah Essack
BACKGROUND: The increasing spectrum of multidrug-resistant bacteria is a major global public health concern, necessitating discovery of novel antimicrobial agents. Here, members of the genus Bacillus are investigated as a potentially attractive source of novel antibiotics due to their broad spectrum of antimicrobial activities. We specifically focus on a computational analysis of the distinctive biosynthetic potential of Bacillus paralicheniformis strains isolated from the Red Sea, an ecosystem exposed to adverse, highly saline and hot conditions...
May 22, 2018: BMC Genomics
https://www.readbyqxmd.com/read/29788758/synthesis-and-biological-evaluation-of-2-aminothiazole-thiazolidinone-conjugates-as-potential-antitubercular-agents
#6
Mahmoud F Abo-Ashour, Wagdy M Eldehna, Riham F George, Marwa M Abdel-Aziz, Mahmoud M Elaasser, Sahar M Abou-Seri, Nagwa M Abdel Gawad
AIM: Mycobacterium tuberculosis, which causes tuberculosis, continues to infect millions of the global population, resulting in 1.8 million deaths worldwide in 2015. METHODOLOGY: Hybrids of 2-amino-4-methylthiazole bearing 5-acetyl/5-ethyl carboxylate functionality with 5-arylidene thiazolidinone moiety (6a-k and 9a-d) were synthesized and screened for antitubercular and antimicrobial activities. RESULTS & DISCUSSION: 5-ethyl carboxylate derivative 6k revealed half antitubercular activity (minimal inhibitory concentration = 1...
May 23, 2018: Future Medicinal Chemistry
https://www.readbyqxmd.com/read/29785529/isolation-and-characterization-of-bacillus-sp-gfp-2-a-novel-bacillus-strain-with-antimicrobial-activities-from-whitespotted-bamboo-shark-intestine
#7
Jia Wu, Guoqiang Xu, Yangyang Jin, Cong Sun, Li Zhou, Guodong Lin, Rong Xu, Ling Wei, Hui Fei, Dan Wang, Jianqing Chen, Zhengbing Lv, Kuancheng Liu
The abuse of antibiotics and following rapidly increasing of antibiotic-resistant pathogens is the serious threat to our society. Natural products from microorganism are regarded as the important substitution antimicrobial agents of antibiotics. We isolated a new strain, Bacillus sp. GFP-2, from the Chiloscyllium plagiosum (Whitespotted bamboo shark) intestine, which showed great inhibitory effects on the growth of both Gram-positive and Gram-negative bacteria. Additionally, the growth of salmon was effectively promoted when fed with inactivated strain GFP-2 as the inhibition agent of pathogenic bacteria...
May 22, 2018: AMB Express
https://www.readbyqxmd.com/read/29785265/a-randomized-controlled-trial-of-the-safety-and-efficacy-of-a-topical-gentamicin-collagen-sponge-in-diabetic-patients-with-a-mild-foot-ulcer-infection
#8
Ilker Uçkay, Benjamin Kressmann, Sébastien Di Tommaso, Marina Portela, Heba Alwan, Hubert Vuagnat, Sophie Maître, Christophe Paoli, Benjamin A Lipsky
Objectives: The initial phase of infection of a foot ulcer in a person with diabetes is often categorized as mild. Clinicians usually treat these infections with antimicrobial therapy, often applied topically. Some experts, however, believe that mild diabetic foot ulcer infections will usually heal with local wound care alone, without antimicrobial therapy or dressings. Methods: To evaluate the potential benefit of treatment with a topical antibiotic, we performed a single-center, investigator-blinded pilot study, randomizing (1:1) adult patients with a mild diabetic foot ulcer infection to treatment with a gentamicin-collagen sponge with local care versus local care alone...
2018: SAGE Open Medicine
https://www.readbyqxmd.com/read/29785214/etiological-trends-and-patterns-of-antimicrobial-resistance-in-respiratory-infections
#9
Salma M Al-Zain Ahmed, Sara S Abdelrahman, Doua M Saad, Isra S Osman, Modasir G Osman, Eltahir A G Khalil
Background: Respiratory infections are one of the commonest causes of morbidity and mortality related to infectious diseases worldwide. The emergence of antimicrobial resistance is a major global health problem which is well established in developing countries. Good clinical suspicion and correct laboratory identification of respiratory infection causing organisms followed by the appropriate management are needed to compact both community-acquired and nosocomial infection respiratory infections...
2018: Open Microbiology Journal
https://www.readbyqxmd.com/read/29785209/acute-suppurative-thyroiditis-caused-by-thyroid-papillary-carcinoma-in-the-right-thyroid-lobe-of-a-healthy-woman
#10
Hazuki Otani, Masakazu Notsu, Sayo Koike, Miwa Morita, Masahiro Yamamoto, Mika Yamauchi, Takahumi Fuchiwaki, Ichiro Morikura, Noriaki Aoi, Hideyuki Kawauchi, Teruaki Iwabashi, Asuka Araki, Noriyoshi Ishikawa, Riruke Maruyama, Toshitsugu Sugimoto
Background: The thyroid gland is resistant to microbial infection, because of its organ characteristics such as encapsulation, iodine content, and rich blood supply. Therefore, acute suppurative thyroiditis (AST), as a bacterial infection of the thyroid gland, is rarely seen. AST typically takes places on the left side the neck region in children, because of the coincidence of the left piriform sinus fistula, as a most common route of infection. AST is also usually seen in immunocompromised hosts...
2018: Thyroid Research
https://www.readbyqxmd.com/read/29783770/isolation-and-antimicrobial-activity-of-coumarin-derivatives-from-fruits-of-peucedanum-luxurians-tamamsch
#11
Jarosław Widelski, Simon Vlad Luca, Adrianna Skiba, Ioanna Chinou, Laurence Marcourt, Jean-Luc Wolfender, Krystyna Skalicka-Wozniak
As a continuation of searching for phytoconstituents that act as promising agents for antimicrobial therapy, rare coumarins were isolated from fruits of Peucedanum luxurians and tested. In a first step, the content of major compounds in the aerial parts and fruits of P. luxurians were compared. The results clearly showed that the fruits with dichloromethane as a solvent yielded, in most cases, higher concentrations of almost all the analyzed coumarins than the aerial parts, with peucedanin detected as the most abundant compound with a concentration of 4563...
May 20, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29783696/jatrorrhizine-hydrochloride-suppresses-proliferation-migration-and-secretion-of-synoviocytes-in-vitro-and-ameliorates-rat-models-of-rheumatoid-arthritis-in-vivo
#12
Haiwen Qiu, Shengnan Sun, Xuemei Ma, Congcong Cui, Gang Chen, Zhenzhou Liu, Hui Li, Mei Liu
Jatrorrhizine hydrochloride (JH), an active component isolated from the traditional Chinese herb Coptis chinensis , has been reported to have antimicrobial, antitumor, antihypercholesterolemic, and neuroprotective activities. However, its antirheumatoid arthritis (RA) property remains unknown. In this study, a collagen-induced arthritis (CIA) rat model was used to evaluate the therapeutic effects of JH on RA by using arthritis score, radiological evaluation, and histopathological assessment. The in vitro effects of JH on proliferation, migration, and production of inflammatory mediators in RA-derived fibroblast-like synoviocyte MH7A cells were determined by the EdU incorporation assay, wound healing assay, real-time PCR, and ELISA, respectively...
May 18, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29783685/novel-imidazole-aldoximes-with-broad-spectrum-antimicrobial-potency-against-multidrug-resistant-gram-negative-bacteria
#13
Mirjana Skočibušić, Renata Odžak, Alma Ramić, Tomislav Smolić, Tomica Hrenar, Ines Primožič
In the search for a new class of potential antimicrobial agents, five novel N -substituted imidazole 2-aldoximes and their six quaternary salts were evaluated. The antimicrobial activity was assessed against a panel of representative Gram-positive and Gram-negative bacteria, including multidrug resistant bacteria. All compounds demonstrated potent in vitro activity against the tested microorganisms, with MIC values ranging from 6.25 to 50.0 μg/mL. Among the tested compounds, two quaternary compounds ( N -but-3-enyl- and meta - ( 10 ) or para - N -chlorobenzyl ( 11 ) imidazolium 2-aldoximes) displayed the most potent and broad-spectrum activity against both Gram-positive and Gram-negative bacterial strains...
May 18, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29782954/comparison-between-disk-diffusion-and-agar-dilution-methods-to-determine-in-vitro-susceptibility-of-corynebacterium-spp-clinical-isolates-and-update-of-their-susceptibility
#14
Claudia Barberis, Eugenia Sandoval, Carlos Hernán Rodriguez, María Soledad Ramírez, Angela Famiglietti, Marisa Almuzara, Carlos Vay
INTRODUCTION: Although Corynebacterium species are part of the skin and mucous membranes microbiota, human infections caused by Corynebacterium spp. have been reported and the multidrug resistance pattern of the recovered isolates was emphasized. Due to the usefulness of disk diffusion in daily practice, the purpose of this work was to compare disk diffusion against agar dilution to determine disk diffusion breakpoints and to review the antimicrobial susceptibility of the most frequent Corynebacterium spp...
May 18, 2018: Journal of Global Antimicrobial Resistance
https://www.readbyqxmd.com/read/29782890/novel-dental-adhesive-resin-with-crack-self-healing-antimicrobial-and-remineralization-properties
#15
Shichao Yue, Junling Wu, Qiang Zhang, Ke Zhang, Michael D Weir, Satoshi Imazato, Yuxing Bai, Hockin H K Xu
OBJECTIVES: Secondary caries at the tooth-restoration margins is a primary reason for restoration failure. Cracks at the margins lead to leakage which can trap bacteria, producing acids to cause caries. To date, there has been no report on developing an adhesive resin that has self-healing, antibacterial and remineralizing capabilities. The objectives of this study were to: (1) develop the first self-healing adhesive with antimicrobial and remineralizing capabilities, and (2) investigate the effects of incorporating microcapsules, dimethylaminohexadecyl methacrylate (DMAHDM) and nanoparticles of amorphous calcium phosphate (NACP) for the first time...
May 18, 2018: Journal of Dentistry
https://www.readbyqxmd.com/read/29782686/promotion-and-inhibition-of-synchronous-glycolytic-oscillations-in-yeast-by-chitosan
#16
Kenichi Shibata, Takashi Amemiya, Yu Kawakita, Kohei Obase, Kiminori Itoh, Masahiro Takinoue, Satoshi Nakata, Tomohiko Yamaguchi
Synchronous rhythmic activities play crucial roles in diverse biological systems. Glycolytic oscillations in yeast cells have been studied for 50 years with the aim of elucidating the mechanisms underlying the intracellular oscillations and their synchronization. We investigated the effects of chemical disturbances on the individual and collective glycolytic oscillations in yeast cells encapsulated in alginate microparticles, and demonstrated that the addition of chitosan, an antimicrobial agent, decreased the duration of these oscillations...
May 21, 2018: FEBS Journal
https://www.readbyqxmd.com/read/29782237/effect-of-porins-and-bla-kpc-expression-on-activity-of-imipenem-with-relebactam-in-klebsiella-pneumoniae-can-antibiotic-combinations-overcome-resistance
#17
Gregory Balabanian, Michael Rose, Nyla Manning, David Landman, John Quale
Imipenem with relebactam is a novel β-lactam-β-lactamase inhibitor that has activity against most KPC-producing Enterobacteriaceae. Using 10 isolates of KPC-possessing Klebsiella pneumoniae, we assessed the relationship between imipenem-relebactam minimum inhibitory concentrations (MICs) and mechanisms known to contribute to antimicrobial resistance. The effect of adding a second agent was assessed by time-kill experiments. Mutations affecting the genes encoding porins ompK35 and ompK36 and identification of β-lactamases were assessed by PCR...
May 21, 2018: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/29781787/evaluating-the-duration-of-prophylactic-post-operative-antibiotic-agents-after-open-reduction-internal-fixation-for-closed-fractures
#18
Brett D Crist, Lasun O Oladeji, Gregory J Della Rocca, David A Volgas, James P Stannard, David D Greenberg
BACKGROUND: The importance of timely pre-operative antibiotic agents for effective surgical prophylaxis has been established but the optimal duration of antimicrobial coverage post-operatively has not yet been defined clearly. The purpose of this study was to determine if prophylactic post- operative cefazolin for 23 hours decreases the risk of surgical site infection (SSI) after open reduction internal fixation (ORIF) of closed extremity fractures. PATIENTS AND METHODS: After Institutional Reviews Board approval, patients undergoing ORIF of closed extremity fractures who had a planned post-operative stay of at least 23 hours were randomly assigned to either receive 23 hours of cefazolin or a placebo...
May 21, 2018: Surgical Infections
https://www.readbyqxmd.com/read/29781307/anti-pseudomonas-aeruginosa-activity-of-hemlock-conium-maculatum-apiaceae-essential-oil
#19
Michela Di Napoli, Mario Varcamonti, Adriana Basile, Maurizio Bruno, Filippo Maggi, Anna Zanfardino
Conium maculatum is a nitrophilous weed belonging to the Apiaceae family and occurring in hedgerows, pastures, waste ground, along rivers and roadsides. Little is known on the chemistry and bioactivity of other secondary metabolites occurring in the plant. In the present work, we have analysed the chemical composition and antimicrobial activity of the essential oils hydrodistilled from leaves and inflorescenes of C. maculatum growing in Sicily, Italy. The composition of essential oils was achieved by gas chromatography-mass spectrometry (GC-MS) analysis, whereas the inhibitory effects on the growth of two Gram negative strains, namely Escherichia coli and Pseudomonas aeruginosa were assessed by two different analysis...
May 21, 2018: Natural Product Research
https://www.readbyqxmd.com/read/29780647/rare-but-not-infrequent-infective-endocarditis-caused-by-abiotrophia-defectiva
#20
Sonia Chowdhury, Matthew L German
Endocarditis (IE) is defined by an infection of a native or prosthetic heart valve, the mural endocardium, or an indwelling cardiac device. Although viridan-group streptococci (VGS) and Staphylococci species have collectively been considered as the most common cause of endocarditis, uncommon pathogens may also lead to the disease with significant morbidity and mortality. Abiotrophia defectiva , a nutritionally variant streptococci (NVS), is a virulent bacterium that preferentially affects endovascular structure and is implicated in many culture-negative endocarditis with dreadful complications such as heart failure, septic embolization, and valve destruction...
2018: Case Reports in Infectious Diseases
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