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https://www.readbyqxmd.com/read/29236057/development-of-houttuynia-cordata-extract-loaded-solid-lipid-nanoparticles-for-oral-delivery-high-drug-loading-efficiency-and-controlled-release
#1
Ju-Heon Kim, Jong-Suep Baek, Jin-Kyu Park, Bong-Joo Lee, Min-Soo Kim, Sung-Joo Hwang, Jae-Young Lee, Cheong-Weon Cho
Houttuynia cordata (H. cordata) has been used for diuresis and detoxification in folk medicine as well as a herbal medicine with antiviral and antibacterial activities. H. cordata extract-loaded solid lipid nanoparticles (H-SLNs) were prepared with various concentration of poloxamer 188 or poloxamer 407 by a hot homogenization and ultrasonication method. H-SLNs dispersion was freeze-dried with or without trehalose as a cryoprotectant. The physicochemical characteristics of H-SLNs were evaluated by dynamic laser scattering (DLS), differential scanning calorimetry (DSC), Fourier transform infrared spectroscopy (FT-IR), and scanning electron microscopy (SEM)...
December 13, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29235842/mussel-inspired-synthesis-of-nir-responsive-and-biocompatible-ag-graphene-2d-nano-agents-for-versatile-bacterial-disinfections
#2
Xin Fan, Fan Yang, Chuanxiong Nie, Ye Yang, Haifeng Ji, Chao He, Chong Cheng, Changsheng Zhao
Pathogenic bacterial infection has been becoming as a global threat towards people's health, especially the massive usage of antibiotics due to the lack of antibacterial agents with less side-effects. Developing new nano-agents to fight pathogenic bacteria has provided enormous new possibilities in the treatment of bacterial infections, such as the graphene based 2D antibacterial nano-agents with different bacterial inhibition capabilities; however, mussel-inspired design of NIR-responsive and biocompatible Ag-graphene nano-agents possessed with efficient and versatile bacterial disinfection activities have rarely been reported...
December 13, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29235425/antibacterial-effect-of-2r-3r-dihydromyricetin-on-the-cellular-functions-of-staphylococcus-aureus
#3
Yan-Ping Wu, Jin-Rong Bai, Kai Zhong, Ding-Ding Bai, Yi-Na Huang, Kai Xiao, Yun Ran, Hong Gao
The C-3-OH, C-4 carbonyl oxygen and hydrogenation of C2=C3 bond on the C-ring of 2R,3R-dihydromyricetin (DMY) proved to be not necessary for the antibacterial activity against Staphylococcus aureus. DMY significantly decreased the intracellular ATP of S. aureus cells but had few effects on pHin, proline oxidation, succinate dehydrogenase activity or malate dehydrogenase activity.
December 13, 2017: Bioscience, Biotechnology, and Biochemistry
https://www.readbyqxmd.com/read/29235413/facile-and-large-scale-synthesis-of-curcumin-pva-hydrogel-effectively-kill-bacteria-and-accelerate-cutaneous-wound-healing-in-the-rat
#4
Fei He, Hongjing Jiao, Yu Tian, Libo Zhao, Xiaozhu Liao, Zengjie Fan, Bin Liu
The complicated synthesis procedure and limited preparation size of hydrogel inhibit its clinical application. Therefore, a facile preparation method for large-size hydrogel is required. In this study, a series of curcumin (Cur)/polyvinyl alcohol (PVA) hydrogel in a large size with different Cur concentrations is prepared by a facile physical-chemical crosslinking. The physicochemical properties, antibacterial performance and accelerating wound healing ability are evaluated with the aim of attaining a novel and effective wound dressing...
December 13, 2017: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/29235375/chitosan-nanoparticles-loaded-hydrogels-promote-skin-wound-healing-through-the-modulation-of-reactive-oxygen-species
#5
Tao Wang, Yan Zheng, Yaping Shen, Yijie Shi, Fang Li, Chang Su, Liang Zhao
This study developed a novel bioactive chitosan nanoparticle loaded calcium alginate hydrogel to regulate inflammation and neovascularization for accelerated wound healing in vivo. It was found that chitosan nanoparticles loaded calcium alginate hydrogel exhibited remarkable antibacterial activity. Through the modulation of generation of ROS, it promoted the synthesis and secretion of IL-6 in vascular endothelial cell (VEC), suggesting its potential proinflammatory activation. Further, it promoted VEC invasion, metastasis and neovascularization to accelerate wound healing...
December 13, 2017: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/29235292/-a-new-naphthalene-derivative-from-aloe-vera-and-its-antibacterial-activity
#6
Wei-Song Kong, Jing Li, Xin Liu, Qi-Li Mi, Jian-Hua Chen, Xue-Mei Li, Guang-Yu Yang, Qiu-Fen Hu, Tao Li, Ye-Kun Yang
A new naphthalene derivative has been isolated from Aloe vera by using various chromatographic techniques, including silica gel, sephadex, MCI-gel resin, and RP-HPLC. The new compound was determined as 3-hydroxy-1-(1,7-dihydroxy-3,6-dimethoxynaphthalen-2-yl)propan-1-one (1). In the biological activity assay, compound 1 disglayed prominent antibacterial activity with a MIC90 value of (48±4) mg•L⁻¹ for methicillin resistant Staphylococcus aureus (MRSA) strain which was stronger than that of the positive control levofloxacin with a MIC90 value (58±5) mg•L⁻¹...
October 2017: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/29234605/synthesis-and-biomedical-applications-of-cerium-oxide-nanoparticles-a-review
#7
REVIEW
S Rajeshkumar, Poonam Naik
A cerium oxide nanoparticles (nanoceria) has a wide range of applications in different fields, especially biomedical division. As a matter of concern, it has a major impact on the human health and environment. The aim of this review is to address the different ways of synthesis of nanoceria using chemical and green synthesis methods and characterization and the applications of nanoceria for antioxidant, anticancer, antibacterial activities and toxicological studies including the most recent studies carried out in vivo and in vitro to study the problems...
March 2018: Biotechnology Reports
https://www.readbyqxmd.com/read/29234410/scorpion-venom-active-polypeptide-may-be-a-new-external-drug-of-diabetic-ulcer
#8
Ting Wan, Luocheng Li, Zhanyong Zhu, Siyang Liu, Yueqiang Zhao, Mosheng Yu
Background: The epidermal growth factor (EGF) is recognized medicine of therapy in ulcer. However, its efficacy has been challenged. We compared scorpion venom active polypeptide and EGF of therapeutic effects in diabetic ulcer. Methods: The scorpion venom active polypeptide is made into gel. Fourteen diabetic SD rats were randomly divided into scorpion peptide gel group (SPG group) and EGF group. Before treatment, the rat model of diabetic ulcer was created. The levels of IL-1, IL-6, IL-8, and TNF-α in the wound tissue were measured at different time points during the treatment, secretions of wound were collected for bacterial culture, and the wound healing was recorded...
2017: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/29234399/antimicrobial-activities-and-time-kill-kinetics-of-extracts-of-selected-ghanaian-mushrooms
#9
Theresa Appiah, Yaw Duah Boakye, Christian Agyare
The rapid rise of antimicrobial resistance is a worldwide problem. This has necessitated the need to search for new antimicrobial agents. Mushrooms are rich sources of potential antimicrobial agents. This study investigated the antimicrobial properties of methanol extracts of Trametes gibbosa, Trametes elegans, Schizophyllum commune, and Volvariella volvacea. Agar well diffusion, broth microdilution, and time-kill kinetic assays were used to determine the antimicrobial activity of the extracts against selected test organisms...
2017: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/29234384/screening-of-natural-bioactive-metabolites-and-investigation-of-antioxidant-antimicrobial-antihyperglycemic-neuropharmacological-and-cytotoxicity-potentials-of-litsea-polyantha-juss-ethanolic-root-extract
#10
Nripendra Nath Biswas, Amit Kumar Acharzo, Shams Anamika, Shamsunnahar Khushi, Bishwajit Bokshi
This study was designed to identify some bioactive phytochemicals from ethanolic extract of roots of Litsea polyantha and to evaluate some of its pharmacological activities. Phytochemical tests indicated the presence of reducing sugar, combined reducing sugar, tannins, flavonoids, alkaloids, terpenoids, and phenol. In the antioxidant assay using 2-diphenyl-1-picryl-hydrazyl (DPPH) free radical scavenging method, the IC50 value was found to be 82.31 μg/mL. Total content of phenolic compounds, flavonoid, and tannin was found to be 152...
2017: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/29234365/ethnopharmacological-uses-phytochemistry-and-pharmacological-properties-of-croton-macrostachyus-hochst-ex-delile-a-comprehensive-review
#11
REVIEW
Alfred Maroyi
Croton macrostachyus is widely used as herbal medicine by the indigenous people of tropical Africa. The potential of C. macrostachyus as herbal medicine, the phytochemistry, and pharmacological properties of its parts used as herbal medicines are reviewed. The extensive literature survey revealed that C. macrostachyus is traditionally used to treat or manage at least 81 human and animal diseases and ailments. The species is used as herbal medicine for diseases and ailments such as abdominal pains, cancer, gastrointestinal disorders, malaria, pneumonia, sexually transmitted infections, skin infections, typhoid, and wounds and as ethnoveterinary medicine...
2017: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/29234187/efficacy-of-%C3%AE%C2%B5-poly-l-lysine-as-an-antibacterial-additive-for-platelets-stored-at-room-temperature
#12
Hosein Timori Naghadeh, Zohreh Sharifi, Saeideh Soleimani, Zainab Pir Mohamad Jamaat, Shirin Ferdowsi
No abstract text is available yet for this article.
September 2017: Iranian Journal of Medical Sciences
https://www.readbyqxmd.com/read/29234001/revisiting-unexploited-antibiotics-in-search-of-new-antibacterial-drug-candidates-the-case-of-%C3%AE-actinorhodin
#13
Nada M Nass, Sannia Farooque, Charlotte Hind, Matthew E Wand, Christopher P Randall, J Mark Sutton, Ryan F Seipke, Christopher M Rayner, Alex J O'Neill
Of the thousands of natural product antibiotics discovered to date, only a handful have been developed for the treatment of bacterial infection. The clinically unexploited majority likely include compounds with untapped potential as antibacterial drugs, and in view of the ever-growing unmet medical need for such agents, warrant systematic re-evaluation. Here we revisit the actinorhodins, a class that was first reported 70 years ago, but which remains poorly characterized. We show that γ-actinorhodin possesses many of the requisite properties of an antibacterial drug, displaying potent and selective bactericidal activity against key Gram-positive pathogens (including Staphylococcus aureus and enterococci), a mode of action distinct from that of other agents in clinical use, an extremely low potential for the development of resistance, and a degree of in vivo efficacy in an invertebrate model of infection...
December 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29233893/diversification-of-type-vi-secretion-system-toxins-reveals-ancient-antagonism-among-bee-gut-microbes
#14
Margaret I Steele, Waldan K Kwong, Marvin Whiteley, Nancy A Moran
Microbial communities are shaped by interactions among their constituent members. Some Gram-negative bacteria employ type VI secretion systems (T6SSs) to inject protein toxins into neighboring cells. These interactions have been theorized to affect the composition of host-associated microbiomes, but the role of T6SSs in the evolution of gut communities is not well understood. We report the discovery of two T6SSs and numerous T6SS-associated Rhs toxins within the gut bacteria of honey bees and bumble bees. We sequenced the genomes of 28 strains of Snodgrassella alvi, a characteristic bee gut microbe, and found tremendous variability in their Rhs toxin complements: altogether, these strains appear to encode hundreds of unique toxins...
December 12, 2017: MBio
https://www.readbyqxmd.com/read/29233781/synthesis-and-in-vitro-evaluation-of-2-2-ether-amino-methylene-dimedone-derivatives-as-potential-antimicrobial-agents
#15
Ali Mohd Lone, Muneer Ahmad Bhat, Muzafar Ahmad Rather, Wajaht Amin Shah, Zubair Shanib Bhat, Irfan Qadir Tantry, Poonam Prakash
The study was designed with an aim to synthesize a series of 2-(((2-ether)amino)methylene)-dimedone derivatives and evaluate the synthesized compounds for antimicrobial activity. Compound library was synthesized by reaction with alkyl, alkenyl, alkynyl and alicyclic bromo-compounds. Characterization of the synthesized compounds was performed by 1H NMR, 13C NMR and mass spectral techniques. The compounds were evaluated for their antibacterial activity against Gram-positive (Staphylococcus aureus, Bacillus subtilis, Clostridium sporogenes) and Gram-negative bacteria (Pseudomonas aeruginosa, Escherichia coli)...
December 9, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29233776/bovine-mastitis-an-appraisal-of-its-alternative-herbal-cure
#16
REVIEW
Saleem Mushtaq, Aabid Manzoor Shah, Aiyatullah Shah, Sajad Ahmad Lone, Aehtesham Hussain, Qazi Parvaiz Hassan, Md Niamat Ali
Bovine mastitis is globally recognised as the most common and costly disease affecting dairy herds. The disease causes huge financial losses to dairy industries by reduced yield and milk quality, deaths and culling of affected cows and also by associated treatment costs. The disease occurs due to invasion of the mammary glands by pathogenic bacteria followed by their multiplication in the milk producing tissues. The most common treatment method available against bovine mastitis is the intra-mammary infusion of antibiotics...
December 9, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29233653/design-synthesis-and-structure-activity-relationship-evaluation-of-novel-lpxc-inhibitors-as-gram-negative-antibacterial-agents
#17
Shi Ding, Rui-Yang Dai, Wen-Ke Wang, Qiao Cao, Le-Fu Lan, Xian-Li Zhou, Yu-She Yang
LpxC inhibitors are new-type antibacterial agents developed in the last twenty years, mainly against Gram-negative bacteria infections. To develop novel LpxC inhibitors with good antibacterial activities and biological metabolism, we summarized the basic skeleton of reported LpxC inhibitors, designed and synthesized several series of compounds and tested their antibacterial activities against Escherichial coli and Pseudomonas aeruginosa in vitro. Structure-activity relationships have been discussed in this article...
December 5, 2017: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/29233495/antibacterial-resistance-patterns-of-extended-spectrum-%C3%AE-lactamase-producing-enteropathogenic-escherichia-coli-strains-isolated-from-children
#18
Pejman Karami, Hassan Bazmamoun, Iraj Sedighi, Amir Sasan Mozaffari Nejad, Mohammad Mehdi Aslani, Mohammad Yousef Alikhani
BACKGROUND AND STUDY AIM: This study aimed to determine the antibacterial resistance patterns of extended spectrum β-lactamase (ESBL)-producing enteropathogenic Escherichia coli (EPEC) isolated from Iranian children and to investigate its genetic patterns. PATIENTS AND METHODS: 192 non-repeats EPEC isolates were collected from stool samples of the children with and without diarrhoea. The EPEC strains were isolated from 1355 stool specimens obtained from 247 children with diarrhoea (0-10 years old; mean age, 5...
December 7, 2017: Arab Journal of Gastroenterology: the Official Publication of the Pan-Arab Association of Gastroenterology
https://www.readbyqxmd.com/read/29233039/characterization-antibacterial-total-antioxidant-scavenging-reducing-power-and-ion-chelating-activities-of-green-synthesized-silver-copper-and-titanium-dioxide-nanoparticles-using-artemisia-haussknechtii-leaf-extract
#19
Mehran Alavi, Naser Karimi
Recently, major problem related to pathogenic bacteria is augmentation of antibiotic resistance which has been changed treatment and recovery of millions of infectious patients. The present study reports an eco-friendly, rapid and easy method for synthesis of silver (Ag), copper (Cu) and titanium dioxide (TiO2) nanoparticles (NPs) using Artemisia haussknechtii leaf aqueous extract with antibacterial activities against multi-drug resistance (MDR) bacteria species. Three different concentrations (0.001, 0.01 and 0...
December 12, 2017: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/29232982/antioxidant-and-antimicrobial-properties-of-casteanea-sativa-miller-chestnut-honey-produced-on-mount-etna-sicily
#20
Simone Ronsisvalle, Edmondo Lissandrello, Virginia Fuochi, Giulio Petronio Petronio, Claudia Straquadanio, Lucia Crascì, Annamaria Panico, Marcella Milito, Anna Maria Cova, Gianna Tempera, Pio Maria Furneri
The aim of this study was the evaluation of antibacterial and antioxidant properties of Monofloral Etna Castanea sativa Miller honeys. Escherichia coli ATCC 25,922, Pseudomonas aeruginosa ATCC 27,853, Enterococcus faecalis ATCC 29,211 and Staphylococcus aureus ATCC 29,213 were investigated for their susceptibilities to two different honeys. Antioxidant activity was evaluated by ORAC, NO scavenger assays, FRAP and DPPH. Antioxidant activity and antibacterial properties were compared with chestnut honeys from different geographical areas and with Manuka honey...
December 13, 2017: Natural Product Research
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