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https://www.readbyqxmd.com/read/28107663/antibacterial-anti-oxidant-electroactive-injectable-hydrogel-as-self-healing-wound-dressing-with-hemostasis-and-adhesiveness-for-cutaneous-wound-healing
#1
Xin Zhao, Hao Wu, Baolin Guo, Ruonan Dong, Yusheng Qiu, Peter X Ma
Injectable self-healing hydrogel dressing with multifunctional properties including anti-infection, anti-oxidative and conductivity promoting wound healing process will be highly desired in wound healing application and its design is still a challenge. We developed a series of injectable conductive self-healed hydrogels based on quaternized chitosan-g-polyaniline (QCSP) and benzaldehyde group functionalized poly(ethylene glycol)-co-poly(glycerol sebacate) (PEGS-FA) as antibacterial, anti-oxidant and electroactive dressing for cutaneous wound healing...
January 11, 2017: Biomaterials
https://www.readbyqxmd.com/read/28104793/rab23-s-genetic-structure-function-and-related-diseases-a-review
#2
Li-Qiang Zheng, Su-Min Chi, Cheng-Xin Li
Rab23, has been proven to play a role in membrane trafficking and protein transport in eukaryotic cells. Rab23 is also a negative regulator of the Sonic hedgehog signaling pathway in an indirect way. The nonsense mutation and loss of protein of Rab23 has been associated with neural tube defect in mice and aberrant expression in various diseases in human such as neural system,breast, visceral and cutaneous tumor. In addition, Rab23 may play joint  roles in autophagosome formation during anti-infection process against  Group A streptococcus...
January 19, 2017: Bioscience Reports
https://www.readbyqxmd.com/read/28099236/intratracheal-instillation-of-perfluorohexane-modulates-the-pulmonary-immune-microenvironment-by-attenuating-early-inflammatory-factors-in-patients-with-smoke-inhalation-injury-a-randomized-controlled-clinical-trial
#3
Hui Ding, Qi Lv, Shiman Wu, Shike Hou, Ziquan Liu, Ning Xu Landén, Ping Tian, Mengyang Yu, Zhiguang Sun, Haojun Fan
Smoke inhalation injury (SII) is associated with significant morbidity and mortality in burn patients, and effective treatments are lacking. Perfluorocarbons (PFCs) have a protective effect against acute lung injury. We aimed to assess the therapeutic effects of perfluorohexane on burn patients with SII. Patients with burns complicated by moderately severe SII were randomly divided into control (n = 11) and PFC groups (n = 12). The control group received conventional treatment (anti-infection, nutritional support, antishock measures, and supportive treatment)...
January 10, 2017: Journal of Burn Care & Research: Official Publication of the American Burn Association
https://www.readbyqxmd.com/read/28096487/a-clostridium-difficile-specific-gel-forming-protein-required-for-optimal-spore-germination
#4
M Lauren Donnelly, William Li, Yong-Qing Li, Lauren Hinkel, Peter Setlow, Aimee Shen
: Clostridium difficile is a Gram-positive spore-forming obligate anaerobe that is a leading cause of antibiotic-associated diarrhea worldwide. In order for C. difficile to initiate infection, its aerotolerant spore form must germinate in the gut of mammalian hosts. While almost all spore-forming organisms use transmembrane germinant receptors to trigger germination, C. difficile uses the pseudoprotease CspC to sense bile salt germinants. CspC activates the related subtilisin-like protease CspB, which then proteolytically activates the cortex hydrolase SleC...
January 17, 2017: MBio
https://www.readbyqxmd.com/read/28095785/risk-factors-and-medical-costs-for-healthcare-associated-carbapenem-resistant-escherichia-coli-infection-among-hospitalized-patients-in-a-chinese-teaching-hospital
#5
Xiujuan Meng, Sidi Liu, Juping Duan, Xun Huang, Pengcheng Zhou, Xinrui Xiong, Ruie Gong, Ying Zhang, Yao Liu, Chenchao Fu, Chunhui Li, Anhua Wu
BACKGROUND: The emergence and spread of Carbapenem-resistant Escherichia coli (CREC) is becoming a serious problem in Chinese hospitals, however, the data on this is scarce. Therefore, we investigate the risk factors for healthcare-associated CREC infection and study the incidence, antibiotic resistance and medical costs of CREC infections in our hospital. METHODS: We conducted a retrospective, matched case-control-control, parallel study in a tertiary teaching hospital...
January 17, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28088378/antimicrobial-coated-implants-in-trauma-and-orthopaedics-a-clinical-review-and-risk-benefit-analysis
#6
REVIEW
Volker Alt
Implant-associated infections remain a major issue in orthopaedics and antimicrobial functionalization of the implant surface by antibiotics or other anti-infective agents have gained interest. The goal of this article is to identify antimicrobial coatings, for which clinical data are available and to review their clinical need, safety profile, and their efficacy to reduce infection rates. PubMed database of the National Library of Medicine was searched for clinical studies on antimicrobial coated implants for internal fracture fixation devices and endoprostheses for bone surgery, for which study design, level of evidence, biocompatibility, development of resistance, and effectiveness to reduce infection rates were analyzed...
December 21, 2016: Injury
https://www.readbyqxmd.com/read/28087472/extract-of-clinopodium-bolivianum-protects-against-e-coli-invasion-of-uroepithelial-cells
#7
Soumitra Mohanty, Witchuda Kamolvit, Silvia Zambrana, Corine Sandström, Eduardo Gonzales, Claes-Göran Östenson, Annelie Braunerf
ETHNOPHARMACOLOGICAL RELEVANCE: Clinopodium bolivianum is a South American plant with anti-inflammatory and anti-infective activities. The increasing antibiotic resistance urges for alternative therapy. Based on its use in traditional medicine, we investigated the effect of C. bolivianum on the ability to defend bladder epithelial cells from E. coli infection. MATERIALS AND METHODS: The extract was analysed by LC-MS. Bladder epithelial cell lines T24 and 5637 and uropathogenic E...
January 10, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28078813/host-defense-peptide-derived-privileged-scaffolds-for-anti-infective-drug-discovery
#8
Ersilia Nigro, Irene Colavita, Daniela Sarnataro, Olga Scudiero, Aurora Daniele, Francesco Salvatore, Antonello Pessi
'Privileged scaffolds' are molecular frameworks which have been successfully exploited for small molecule drug discovery. Peptide privileged scaffolds, featuring a strictly conserved multiple-disulfide framework and high variability in the rest of the sequence, display a broad range of biological effects, including antimicrobial and antiviral activity. Unlike small molecules, however, the cost of manufacturing these peptides is high, and their synthesis challenging. We previously described a simplified privileged scaffold corresponding to the γ-core of human β-defensin-3 (HBD3)...
January 12, 2017: Journal of Peptide Science: An Official Publication of the European Peptide Society
https://www.readbyqxmd.com/read/28077589/trimethoprim-sulfamethoxazole-prophylaxis-during-live-malaria-sporozoite-immunization-induces-long-lived-homologous-and-heterologous-protective-immunity-against-sporozoite-challenge
#9
Charlotte V Hobbs, Charles Anderson, Jillian Neal, Tejram Sahu, Solomon Conteh, Tatiana Voza, Jean Langhorne, William Borkowsky, Patrick E Duffy
Trimethoprim-sulfamethoxazole (TMP-SMX) is widely used in malaria-endemic areas in human immunodeficiency virus (HIV)-infected children and HIV-uninfected, HIV-exposed children as opportunistic infection prophylaxis. Despite the known effects that TMP-SMX has in reducing clinical malaria, its impact on development of malaria-specific immunity in these children remains poorly understood. Using rodent malaria models, we previously showed that TMP-SMX, at prophylactic doses, can arrest liver stage development of malaria parasites and speculated that TMP-SMX prophylaxis during repeated malaria exposures would induce protective long-lived sterile immunity targeting pre-erythrocytic stage parasites in mice...
January 1, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28070047/-clinical-analysis-for-patients-with-continuous-ambulatory-peritoneal-dialysis-associated-peritonitis
#10
Jian Liu, Xun Huang, Yao Liu, Hui Xu, Rui'e Gong, Chunhui Li
To analyze the clinical characteristics of continuous ambulatory peritoneal dialysis (CAPD) associated peritonitis in the tertiary hospitals and to discuss the preventive and therapeutic strategy.
 Methods: The clinical characteristics, pathogens, resistance and outcomes of 126 CAPD associated peritonitis in 104 patients from Jan, 2013 to June, 2016, were retrospectively analyzed.
 Results: Among the patients, the incidence rates of abdominal pain, fever, diarrhea and emesis were 104 (82.54%), 56 (44.44%), 49 (38...
December 28, 2016: Zhong Nan da Xue Xue Bao. Yi Xue Ban, Journal of Central South University. Medical Sciences
https://www.readbyqxmd.com/read/28069377/development-of-an-aptamer-ampicillin-conjugate-for-treating-biofilms
#11
Cheng Lijuan, Yan Xing, Wu Minxi, Li Wenkai, Deng Le
Biofilm formation involves the development of extracellular matrix and initially depends on adherence and tropism by flagellar movement. With the widespread development of antibiotic resistance and tolerance of biofilms, there is a growing need for novel anti-infective strategies. No currently approved medications specifically target biofilms. Aptamers are single-stranded nucleic acid molecules that may bind to their targets with high affinity and affect the target functions. We developed a bifunctional conjugate by linking an aptamer targeting bacterial flagella with ampicillin...
January 6, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28066954/ultrashort-self-assembling-fmoc-peptide-gelators-for-anti-infective-biomaterial-applications
#12
Alice P McCloskey, Emily R Draper, Brendan F Gilmore, Garry Laverty
Biomaterial-related infections have a significant impact on society and are a major contributor to the growing threat of antimicrobial resistance. Current licensed antibiotic classes struggle to breakdown or penetrate the exopolysaccharide biofilm barrier, resulting in sub-therapeutic concentrations of antibiotic at the surface of the biomaterial, treatment failure and increased spread of resistant isolates. This paper focuses for the first time on the ability of ultrashort Fmoc-peptide gelators to eradicate established bacterial biofilms implicated in a variety of medical device infections (Gram-positive: Staphylococcus aureus, Staphylococcus epidermidis and Gram-negative Escherichia coli, Pseudomonas aeruginosa)...
January 9, 2017: Journal of Peptide Science: An Official Publication of the European Peptide Society
https://www.readbyqxmd.com/read/28061685/innovative-approaches-to-improve-anti-infective-vaccine-efficacy
#13
Michael R Yeaman, John P Hennessey
Safe and efficacious vaccines are arguably the most successful medical interventions of all time. Yet the ongoing discovery of new pathogens, along with emergence of antibiotic-resistant pathogens and a burgeoning population at risk of such infections, imposes unprecedented public health challenges. To meet these challenges, innovative strategies to discover and develop new or improved anti-infective vaccines are necessary. These approaches must intersect the most meaningful insights into protective immunity and advanced technologies with capabilities to deliver immunogens for optimal immune protection...
January 6, 2017: Annual Review of Pharmacology and Toxicology
https://www.readbyqxmd.com/read/28060290/visualization-of-the-charcoal-agar-resazurin-assay-for-semi-quantitative-medium-throughput-enumeration-of-mycobacteria
#14
Ben Gold, Julia Roberts, Yan Ling, Landys Lopez Quezada, Jou Glasheen, Elaine Ballinger, Selin Somersan-Karakaya, Thulasi Warrier, Carl Nathan
There is an urgent need to discover and progress anti-infectives that shorten the duration of tuberculosis (TB) treatment. Mycobacterium tuberculosis, the etiological agent of TB, is refractory to rapid and lasting chemotherapy due to the presence of bacilli exhibiting phenotypic drug resistance. The charcoal agar resazurin assay (CARA) was developed as a tool to characterize active molecules discovered by high-throughput screening campaigns against replicating and non-replicating M. tuberculosis. Inclusion of activated charcoal in bacteriologic agar medium helps mitigate the impact of compound carry-over, and eliminates the requirement to pre-dilute cells prior to spotting on CARA microplates...
December 14, 2016: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28046129/isolation-culture-and-characterization-of-hirsutella-sinensis-mycelium-from-caterpillar-fungus-fruiting-body
#15
Yun-Fei Ko, Jian-Ching Liau, Chien-Sheng Lee, Chen-Yaw Chiu, Jan Martel, Chuan-Sheng Lin, Shun-Fu Tseng, David M Ojcius, Chia-Chen Lu, Hsin-Chih Lai, John D Young
The caterpillar fungus Ophiocordyceps sinensis (previously called Cordyceps sinensis) has been used for centuries in Asia as a tonic to improve health and longevity. Recent studies show that O. sinensis produces a wide range of biological effects on cells, laboratory animals and humans, including anti-fatigue, anti-infection, anti-inflammatory, antioxidant, and anti-tumor activities. In view of the rarity of O. sinensis fruiting bodies in nature, cultivation of its anamorph mycelium represents a useful alternative for large-scale production...
2017: PloS One
https://www.readbyqxmd.com/read/28043491/in-vitro-antimycobacterial-activity-and-toxicity-of-eight-medicinal-plants-against-pathogenic-and-nonpathogenic-mycobacterial-strains
#16
Joseph M Nguta, Regina Appiah-Opong, Alexander K Nyarko, Dorothy Yeboah-Manu, Phyllis G A Addo, Isaac Darko Otchere, Abena Kissi-Twum
Tuberculosis (TB) caused by Mycobacterium tuberculosis remains a serious public health challenge towards which new hits are urgently needed. Medicinal plants remains a major source of new ligands against global infectious illnesses. In our laboratories, we are currently investigating locally used ethnobotanicals for novel compounds against zoonotic tuberculosis. The microplate alamar blue assay (MABA) was used to study the anti-TB activity while the CellTiter 96® AQueous Assay, which is composed of solutions of a novel tetrazolium compound [3-(4,5-dimethylthiazol-2-yl)-5-(3-carboxymethoxyphenyl)-2-(4-sulfophenyl)-2H-tetrazolium, inner salt; MTS] and an electron coupling reagent (phenazine methosulfate) PMS, was used for cytotoxic studies...
December 2016: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28043302/-advances-in-the-research-of-sepsis-related-stress-response
#17
M S Qiu, H Y Yin
In recent years, the levels of anti-infection and organ function support of sepsis have been improved, but the mortality rate remains high, which brings about challenges for critical care clinicians. Sources of sepsis-related stress response include severe infection, frequent therapeutic procedures, routine nursing measures, and physical constraints, etc. Although sepsis-related stress response has obtained a lot of concern, its understanding is still in the stage of research and the treatment method is nonspecific...
December 20, 2016: Zhonghua Shao Shang za Zhi, Zhonghua Shaoshang Zazhi, Chinese Journal of Burns
https://www.readbyqxmd.com/read/28019033/evidence-for-the-herg-liability-of-antihistamines-antipsychotics-and-anti-infective-agents-a-systematic-literature-review-from-the-aritmo-project
#18
REVIEW
Lorna Hazell, Emanuel Raschi, Fabrizio De Ponti, Simon H L Thomas, Francesco Salvo, Ernst Ahlberg Helgee, Scott Boyer, Miriam Sturkenboom, Saad Shakir
A systematic review was performed to categorize the hERG (human ether-a-go-go-related gene) liability of antihistamines, antipsychotics, and anti-infectives and to compare it with current clinical risk of torsade de pointes (TdP). Eligible studies were hERG assays reporting half-minimal inhibitory concentrations (IC50). A "hERG safety margin" was calculated from the IC50 divided by the peak human plasma concentration (free Cmax ). A margin below 30 defined hERG liability. Each drug was assigned an "uncertainty score" based on volume, consistency, precision, and internal and external validity of evidence...
December 26, 2016: Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/28012441/ugonin-u-stimulates-nlrp3-inflammasome-activation-and-enhances-inflammasome-mediated-pathogen-clearance
#19
Chun-Yu Chen, Chuan-Hui Yang, Yung-Fong Tsai, Chih-Chuang Liaw, Wen-Yi Chang, Tsong-Long Hwang
The NOD-like receptor pyrin domain 3 (NLRP3) inflammasome contains Nod-like receptors, a subclass of pattern recognition receptors, suggesting that this complex has a prominent role in host defenses. Various structurally diverse stimulators activate the NLRP3 inflammasome through different signaling pathways. We previously reported that ugonin U (UgU), a natural flavonoid isolated from Helminthostachys zeylanica (L) Hook, directly stimulates phospholipase C (PLC) and triggers superoxide release in human neutrophils...
December 18, 2016: Redox Biology
https://www.readbyqxmd.com/read/28001225/adverse-drug-reactions-among-patients-admitted-with-infectious-diseases-at-a-brazilian-hospital
#20
Pamela Alejandra Saavedra, Micheline Marie Milward de Azevedo Meiners, Luciane Cruz Lopes, Emília Vitória da Silva, Dayde Lane Mendonça da Silva, Elza Ferreira Noronha, Maria Inês de Toledo
INTRODUCTION: Despite the therapeutic benefits of drugs, adverse drug reactions (ADRs) occur. Method: We assessed a series of suspected ADRs identified from notifications and intensive monitoring of inpatients from March 2013 to March 2014. RESULTS: Skin reactions predominated (31%). Systemic anti-infective agents were implicated in 16 (72%) reactions. Fifteen (68%) ADRs were classified as possible. The implicated drug was not correctly identified by the healthcare team in 12 cases...
November 2016: Revista da Sociedade Brasileira de Medicina Tropical
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