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https://www.readbyqxmd.com/read/28803388/genetic-diversity-of-the-human-head-lice-pediculus-humanus-capitis-among-primary-school-girls-in-saudi-arabia-with-reference-to-their-prevalence
#1
Sarah A Al-Shahrani, Reem A Alajmi, Tahany H Ayaad, Mohammed A Al-Shahrani, El-Sayed H Shaurub
The present work aimed at investigating the genetic diversity of the head louse Pediculus humanus capitis (P. humanus capitis) among infested primary school girls at Bisha governorate, Saudi Arabia, based on the sequence of mitochondrial cytochrome b (mt cyt b) gene of 121 P. humanus capitis adults. Additionally, the prevalence of pediculosis capitis was surveyed. The results of sequencing were compared with the sequence of human head lice that are genotyped previously. Phylogenetic tree analysis showed the presence of 100% identity (n = 26) of louse specimens with clade A (prevalent worldwide) of the GenBank data base...
August 13, 2017: Parasitology Research
https://www.readbyqxmd.com/read/28800381/the-phosphinoboration-of-n-heterocycles
#2
Stephen Westcott, Stephen J Geier, Christopher M Vogels, Niall R Mellonie, Erika N Daley, Andreas Decken, Simon Doherty
The addition of phosphinoboronate ester Ph2PBpin (pin = 1,2-O2C2Me4) (1) to a number of different N-heterocycles has been investigated. Reaction of 1 with pyridine resulted in highly selective formation of the corresponding 1,4-addition product, with addition of the electron-deficient Bpin group to the pyridine nitrogen atom and the phosphido group to the para carbon atom. Conversely, reactions of para-substituted pyridine derivatives oc-curred predominately to afford 1,2-addition products while quinoline reacted to afford the 1,2-adduct which ultimately isomerized to afford the corresponding 1,4-addition product...
August 11, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28800174/curcumin-ameliorates-diclofenac-sodium-induced-nephrotoxicity-in-male-albino-rats
#3
Ahmady Y Ahmed, Amany M Gad, Ola M Abd El-Raouf
Exposure to drugs often results in toxicity in the kidney which represents the major control system maintaining homeostasis of the body and thus is especially susceptible to xenobiotics. Nephrotoxicity is a life-threatening side-effect of nonsteroidal anti-inflammatory drugs (NSAIDs). Diclofenac is one of the most frequently prescribed NSAIDs and have been reported to cause multiple organs damage. Curcumin (CUR) exhibits nephroprotective properties. Therefore, rats were divided into four groups; rats of groups 3 and 4 received diclofenac (100 mg/kg, i...
August 11, 2017: Journal of Biochemical and Molecular Toxicology
https://www.readbyqxmd.com/read/28798736/escherichia-coli-o157-h7-acid-sensitivity-correlates-with-flocculation-phenotype-during-nutrient-limitation
#4
Kathryn L Kay, Frederick Breidt, Pina M Fratamico, Gian M Baranzoni, Gwang-Hee Kim, Amy M Grunden, Deog-Hwan Oh
Shiga toxin producing Escherichia coli (STEC) strains vary in acid resistance; however, little is known about the underlying mechanisms that result in strain specific differences. Among 25 STEC O157:H7 strains tested, 7 strains flocculated when grown statically for 18 h in minimal salts medium at 37°C, while 18 strains did not. Interestingly, the flocculation phenotype (cells came out of suspension) was found to correlate with degree of acid sensitivity in an assay with 400 mM acetic acid solution at pH 3...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28777558/high-spin-iron-imido-complexes-competent-for-c-h-bond-amination
#5
Matthew J T Wilding, Diana A Iovan, Theodore A Betley
Reduction of previously reported (ArL)FeCl with potassium graphite furnished a low-spin (S = ½) iron complex (ArL)Fe which features an intramolecular η6-arene interaction and can be utilized as an FeI synthon (ArL = 5-mesityl-1,9-(2,4,6-Ph3C6H2)dipyrrin). Treatment of (ArL)Fe with adamantyl azide or mesityl azide led to the formation of the high-spin (S = 5/2), three-coordinate imidos (ArL)Fe(NAd) and (ArL)Fe(NMes), respectively, as determined by EPR, zero-field 57Fe Mössbauer, magnetometry, and single crystal X-ray diffraction...
August 4, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28777328/direct-identification-of-functional-amyloid-proteins-by-label-free-quantitative-mass-spectrometry
#6
Heidi N Danielsen, Susan H Hansen, Florian-Alexander Herbst, Henrik Kjeldal, Allan Stensballe, Per H Nielsen, Morten S Dueholm
Functional amyloids are important structural and functional components of many biofilms, yet our knowledge of these fascinating polymers is limited to a few examples for which the native amyloids have been isolated in pure form. Isolation of the functional amyloids from other cell components represents a major bottleneck in the search for new functional amyloid systems. Here we present a label-free quantitative mass spectrometry method that allows identification of amyloid proteins directly in cell lysates...
August 4, 2017: Biomolecules
https://www.readbyqxmd.com/read/28776678/development-of-post-compressional-textural-tests-to-evaluate-the-mechanical-properties-of-medicated-chewing-gum-tablets-with-high-drug-loadings
#7
Turki Al Hagbani, Sami Nazzal
Medicated chewing gum tablets (CGTs) represent a unique platform for drug delivery. Loading directly compressible gums with high concentrations of powdered medication, however, results in compacts with hybrid properties between a chewable gum and a brittle tablet. The aim of the present study was to develop textural tests that can identify the point at which CGTs begin to behave like a solid tablet upon drug incorporation. Curcumin (CUR) CGTs made with Health in gum® were prepared with increasing CUR load from 0% to 100% and were characterized for their mechanical properties by a single bite (knife) and a two bites tests...
August 4, 2017: Journal of Texture Studies
https://www.readbyqxmd.com/read/28766664/tetrahydrocurcumin-is-more-effective-than-curcumin-in-inducing-the-apoptosis-of-h22-cells-via-regulation-of-a-mitochondrial-apoptosis-pathway-in-ascites-tumor-bearing-mice
#8
Weihai Liu, Zhenbiao Zhang, Guosheng Lin, Dandan Luo, Hanbin Chen, Hongmei Yang, Jiali Liang, Yuhong Liu, Jianhui Xie, Ziren Su, Hongying Cao
Curcumin (CUR), a widely used food additive, is derived mainly from Curcuma species that has been applied traditionally for the treatment of various diseases, including hepatocellular carcinoma (HCC). However, its poor systemic bioavailability hampers its clinical application, which may be related to its wide metabolism. Tetrahydrocurcumin (THC) is a major metabolite of CUR and has been reported to have multiple biologic activities. We investigated, for the first time, the efficacy and associated mechanism of action of THC and CUR in a H22 ascites tumor-bearing model in mice...
August 2, 2017: Food & Function
https://www.readbyqxmd.com/read/28763965/structural-characterization-formation-mechanism-and-stability-of-curcumin-in-zein-lecithin-composite-nanoparticles-fabricated-by-antisolvent-co-precipitation
#9
Lei Dai, Cuixia Sun, Ruirui Li, Like Mao, Fuguo Liu, Yanxiang Gao
Curcumin (Cur) exhibits a range of bioactive properties, but its application is restrained due to its poor water solubility and sensitivity to environmental stresses. In this study, zein-lecithin composite nanoparticles were fabricated by antisolvent co-precipitation technique for delivery of Cur. The result showed that the encapsulation efficiency of Cur was significantly enhanced from 42.03% in zein nanoparticles to 99.83% in zein-lecithin composite nanoparticles. The Cur entrapped in the nanoparticles was in an amorphous state confirmed by differential scanning calorimetry and X-ray diffraction...
December 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28758290/crystal-structure-of-master-biofilm-regulator-csgd-regulatory-domain-reveals-an-atypical-receiver-domain
#10
Yurong Wen, Zhenlin Ouyang, Bart Devreese, Wangxiao He, Yongping Shao, Wuyuan Lu, Fang Zheng
The master regulator CsgD switches planktonic growth to biofilm formation by activating synthesis of curli fimbriae and cellulose in Enterobacteriaceae. CsgD was classified to be the LuxR response regulatory family, while its cognate sensor histidine kinase has not been identified yet. CsgD consists of a C-terminal DNA binding domain and an N-terminal regulatory domain that provokes the upstream signal transduction to further modulate its function. We provide the crystal structure of Salmonella Typhimurium CsgD regulatory domain, which reveals an atypical β5α5 response regulatory receiver domain folding with the α2 helix representing as a disorder loop compared to the LuxR/FixJ canonical response regulator, and the structure indicated a noteworthy α5 helix similar to the non-canonical master regulator VpsT receiver domain α6...
July 30, 2017: Protein Science: a Publication of the Protein Society
https://www.readbyqxmd.com/read/28755319/a-novel-family-of-proline-serine-rich-proteins-which-are-phospho-targets-of-stress-related-mitogen-activated-protein-kinases-differentially-regulates-growth-and-pathogen-defense-in-arabidopsis-thaliana
#11
Mieder Anthony Thomas Palm-Forster, Lennart Eschen-Lippold, Joachim Uhrig, Dierk Scheel, Justin Lee
The molecular actions of mitogen-activated protein kinases (MAPKs) are ultimately accomplished by the substrate proteins where phosphorylation affects their molecular properties and function(s), but knowledge regarding plant MAPK substrates is currently still fragmentary. Here, we uncovered a previously uncharacterized protein family consisting of three proline/serine-rich proteins (PRPs) that are substrates of stress-related MAPKs. We demonstrated the importance of a MAPK docking domain necessary for protein-protein interaction with MAPKs and consequently also for phosphorylation...
July 28, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/28753935/influences-of-orally-taken-carotenoid-rich-curly-kale-extract-on-collagen-i-elastin-index-of-the-skin
#12
Martina C Meinke, Ceylan K Nowbary, Sabine Schanzer, Henning Vollert, Jürgen Lademann, Maxim E Darvin
Two differently designed, spatially resolved reflectance spectroscopy-based scanners and two-photon tomography were used for noninvasive in vivo determination of cutaneous carotenoids, and collagen I/elastin aging index of dermis, respectively, in the skin of 29 healthy female volunteers between 40 and 56 years of age. The volunteers received a supplement in the form of a carotenoid-rich natural curly kale extract containing 1650 µg of carotenoids in total (three capsules of 550 µg), once a day. Measurements were taken before, after 5 months and after 10 months of daily supplementation...
July 19, 2017: Nutrients
https://www.readbyqxmd.com/read/28747587/distribution-of-diverse-escherichia-coli-between-cattle-and-pasture
#13
Gitanjali NandaKafle, Tarren Seale, Toby Flint, Madhav Nepal, Stephanus N Venter, Volker S Brözel
Escherichia coli is widely considered to not survive for extended periods outside the intestines of warm-blooded animals; however, recent studies demonstrated that E. coli strains maintain populations in soil and water without any known fecal contamination. The objective of this study was to investigate whether the niche partitioning of E. coli occurs between cattle and their pasture. We attempted to clarify whether E. coli from bovine feces differs phenotypically and genotypically from isolates maintaining a population in pasture soil over winter...
July 27, 2017: Microbes and Environments
https://www.readbyqxmd.com/read/28745498/curcumin-and-salsalate-suppresses-colonic-inflammation-and-procarcinogenic-signaling-in-high-fat-fed-azoxymethane-treated-mice
#14
Xian Wu, Anna C Pfalzer, Gar Yee Koh, Sanyuan Tang, Jimmy W Crott, Michael J Thomas, Mohsen Meydani, Joel B Mason
High-fat diets (HFDs) and excess adiposity increase proinflammatory cytokines in the colon, altering gene expression in a manner that promotes the development of colorectal cancer (CRC). Thus, compounds that reduce this biochemical inflammation are potential chemopreventive agents. Curcumin (CUR), a dietary polyphenol, and salsalate (SAL), a non-steroidal anti-inflammatory drug, are both anti-inflammatories. We investigated the inhibitory effects of CUR with or without SAL on inflammatory cytokines and procarcinogenic signaling in azoxymethane (AOM)-treated A/J mice...
August 11, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28742327/amphiphilic-peptide-nanorods-based-on-oligo-phenylalanine-as-a-biocompatible-drug-carrier
#15
Su Jeong Song, Seulgi Lee, Kyoung-Seok Ryu, Joon Sig Choi
Peptide nanostructure has been widely explored for drug-delivery systems in recent studies. Peptides possess comparatively lower cytotoxicity and are more efficient than polymeric carriers. Here, we propose a peptide nanorod system, composed of an amphiphilic oligo-peptide RH3F8 (Arg-His3-Phe8), as a drug-delivery carrier. Arginine is an essential amino acid in typical cell-penetration peptides, and histidine induces endo- and lysosomal escape because of its proton sponge effect. Phenylalanine is introduced to provide rich hydrophobicity for stable self-assembly and drug encapsulation...
August 11, 2017: Bioconjugate Chemistry
https://www.readbyqxmd.com/read/28741924/ultrasound-responsive-polymeric-micelles-for-sonoporation-assisted-site-specific-therapeutic-action
#16
Pengying Wu, Yali Jia, Fei Qu, Yue Sun, Pan Wang, Kun Zhang, Chuanshan Xu, Quanhong Liu, Xiaobing Wang
Targeting drug delivery remains a challenge in various disease treatment including cancer. The local drug deposit could be greatly enhanced by some external stimuli-responsive systems. Here we develop pluronic P123/F127 polymeric micelles (M) encapsulating curcumin (Cur) that are permeabilized directly by focused ultrasound, in which ultrasound triggers drug release. Tumor preferential accumulation and site-specific sonochemotherapy were then evaluated. Cur-loaded P123/F127 mixed micelles (Cur-M) exhibited longer circulating time and increased cellular uptake compared to free Cur...
August 9, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28738425/preparation-and-characterization-of-pegylated-iron-oxide-gold-nanoparticles-for-delivery-of-sulforaphane-and-curcumin
#17
Hossein Danafar, Ali Sharafi, Sonia Askarlou, Hamidreza Kheiri Manjili
Natural products have been used for the treatment of various diseases such as cancer. Curcumin (CUR) and sulforaphane (SF) have anti-cancer effects, but their application is restricted because of their low water solubility and poor oral bioavailability. To improve the bioavailability and solubility of SF and CUR, we performed an advanced delivery of SF and CUR with PEGylated gold coated Fe3O4 magnetic nanoparticles (PEGylated Fe3O4@Au NPs) to endorse SF and CUR maintenance as an effective and promising antitumor drugs...
July 24, 2017: Drug Research
https://www.readbyqxmd.com/read/28733234/curcumin-a-component-of-turmeric-efficiently-prevents-diclofenac-sodium-induced-gastroenteropathic-damage-in-rats-a-step-towards-translational-medicine
#18
Devendra Pratap Singh, Swapnil P Borse, Rita Rana, Manish Nivsarkar
There is a need to find/discover novel leads to treat complex and/or multi-factorial disease(s). Curcumin (CUR) is one of the promising lead molecules which need its further evaluation against NSAID-induced gastroenteropathy. Hence, the aim of the present study was to explore the pharmaco-mechanistic efficacy of CUR against NSAID-induced gastroenteropathy. Rats were treated twice daily with CUR (25, 50 and 100 mg kg(-1) peroral) or vehicle for 10 days. In some experiments, diclofenac sodium (DIC; 9 mg kg(-1)) was administered orally twice daily for the final 5 days of CUR/vehicle administration...
July 18, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28732851/nanoparticle-assisted-solvent-selective-transdermal-combination-therapy-of-curcumin-and-5-flurouracil-for-efficient-cancer-treatment
#19
T S Anirudhan, Anoop S Nair, Sabari J Bino
Skin cancer is one among the many prominent diseases of the modern world and millions of people are suffering due to the lack of proper medication. Even though transdermal drug delivery systems (TDDS) provide an efficient route of drug administration, the advantages of combination chemotherapy have rarely been extended into TDDS. In the present work, a polymer capable of simultaneously encapsulating two anti-cancer drugs: 5-flurouracil (5-FU) and curcumin (CUR), and releasing them with varying kinetics as a function of the leaching solvent was developed...
October 1, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28731428/development-of-nasal-lipid-nanocarriers-containing-curcumin-for-brain-targeting
#20
Gustavo Richter Vaz, Gabriela Hädrich, Juliana Bidone, Jamile Lima Rodrigues, Mariana Corrêa Falkembach, Jean-Luc Putaux, Mariana Appel Hort, José Maria Monserrat, Antônio Sergio Varela Junior, Helder Ferreira Teixeira, Ana Luiza Muccillo-Baisch, Ana Paula Horn, Cristiana Lima Dora
BACKGROUND: Curcumin (CUR) has properties that can be useful for the treatment of Alzheimer's disease. Such properties are the inhibition of amyloid-β-protein (Aβ) aggregation, Aβ-induced inflammation, and activities of β-secretase and acetylcholinesterase. However, previous studies have revealed that CUR exhibited low bioavailability and difficulties in reaching the brain. OBJECTIVE: To overcome such drawbacks, this study aims at developing nasal lipid nanocarriers loaded with CUR to effectively target the brain...
2017: Journal of Alzheimer's Disease: JAD
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