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https://www.readbyqxmd.com/read/29141172/an-unusual-cause-of-leg-pain
#1
Noreen P Kelly, Anand Vaidya, Marie Gerhard-Herman, Akshay S Desai
New England Journal of Medicine, Volume 377, Issue 20, November 2017.
November 16, 2017: New England Journal of Medicine
https://www.readbyqxmd.com/read/29141156/plasmid-azobr_p1-borne-fabg-gene-for-putative-3-oxoacyl-acyl-carrier-protein-reductase-is-essential-for-proper-assembly-and-work-of-the-dual-flagellar-system-in-the-alphaproteobacterium-azospirillum-brasilense-sp245
#2
Yulia A Filip'echeva, Andrei V Shelud'ko, Alexei G Prilipov, Gennady L Burygin, Elizaveta M Telesheva, Stella S Yevstigneyeva, Marina P Chernyshova, Lilia P Petrova, Elena I Katsy
Azospirillum brasilense can swim and swarm owing to the activity of a constitutive polar flagellum (Fla) and inducible lateral flagella (Laf), respectively. Experimental data on the regulation of the Fla and Laf assembly in azospirilla are scarce. Here, the coding sequence (CDS) AZOBR_p1160043 (fabG1) for a putative 3-oxoacyl-[acyl-carrier protein (ACP)] reductase was found essential for the construction of both types of flagella. In an immotile leaky Fla- Laf- fabG1::Omegon-Km mutant, Sp245.1610, defects in flagellation and motility were fully complemented by expressing the CDS AZOBR_p1160043 from plasmid pRK415...
November 15, 2017: Canadian Journal of Microbiology
https://www.readbyqxmd.com/read/29141116/fluorine-in-a-c-f-bond-as-the-key-to-cage-formation
#3
Maxwell Gargiulo Holl, Cody Ross Pitts, Thomas Lectka
Cage molecules have long been employed to trap reactive or fleeting species, as their rigid nature allows them to enforce situations that otherwise would not persist. In this minireview, we discuss our use of rigid cage structures to investigate the close noncovalent interactions of fluorine with other functional groups and determine how mutual proximity affects both physical properties and reactivity. Unusual covalent interactions of fluorine are also explored: the cage can close to form the first solution-phase C-F-C fluoronium ion...
November 15, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/29141112/multiscale-geometric-design-principles-applied-to-3d-printed-schwarzites
#4
Seyed Mohammad Sajadi, Peter Samora Owuor, Steven Schara, Cristiano F Woellner, Varlei Rodrigues, Robert Vajtai, Jun Lou, Douglas S Galvão, Chandra Sekhar Tiwary, Pulickel M Ajayan
Schwartzites are 3D porous solids with periodic minimal surfaces having negative Gaussian curvatures and can possess unusual mechanical and electronic properties. The mechanical behavior of primitive and gyroid schwartzite structures across different length scales is investigated after these geometries are 3D printed at centimeter length scales based on molecular models. Molecular dynamics and finite elements simulations are used to gain further understanding on responses of these complex solids under compressive loads and kinetic impact experiments...
November 15, 2017: Advanced Materials
https://www.readbyqxmd.com/read/29141102/statistically-optimized-ceftriaxone-sodium-biotransformation-through-achromobacter-xylosoxidans-strain-cef6-an-unusual-insight-for-bioremediation
#5
Ahmed Anan, Khaled M Ghanem, Amira M Embaby, Ahmed Hussein, Moustafa Y El-Naggar
The present study underlines a unique promising approach toward efficient biotransformation of ceftriaxone sodium (Ceftx), a highly frequent prescribed cephalosporin antibiotic, by a newly bacterium namely Achromobacter xylosoxidans strain Cef6 isolated from Ceftx contaminated raw materials in pharmaceutical industries. A three step sequential statistical-mathematical approach (Plackett-Burman design [PBD], Central Composite Design [CCD], and ridge-canonical analyses) was anticipated to optimize the biotransformation process...
November 15, 2017: Journal of Basic Microbiology
https://www.readbyqxmd.com/read/29141015/nematocytes-discovery-and-characterization-of-a-novel-anculeate-hemocyte-in-drosophila-falleni-and-drosophila-phalerata
#6
Julianna Bozler, Balint Z Kacsoh, Giovanni Bosco
Immune challenges, such as parasitism, can be so pervasive and deleterious that they constitute an existential threat to a species' survival. In response to these ecological pressures, organisms have developed a wide array of novel behavioral, cellular, and molecular adaptations. Research into these immune defenses in model systems has resulted in a revolutionary understanding of evolution and functional biology. As the field has expanded beyond the limited number of model organisms our appreciation of evolutionary innovation and unique biology has widened as well...
2017: PloS One
https://www.readbyqxmd.com/read/29140980/prokaryotic-diversity-and-biogeochemical-characteristics-of-benthic-microbial-ecosystems-at-la-brava-a-hypersaline-lake-at-salar-de-atacama-chile
#7
Maria Eugenia Farias, Maria Cecilia Rasuk, Kimberley L Gallagher, Manuel Contreras, Daniel Kurth, Ana Beatriz Fernandez, Daniel Poiré, Fernando Novoa, Pieter T Visscher
Benthic microbial ecosystems of Laguna La Brava, Salar de Atacama, a high altitude hypersaline lake, were characterized in terms of bacterial and archaeal diversity, biogeochemistry, (including O2 and sulfide depth profiles and mineralogy), and physicochemical characteristics. La Brava is one of several lakes in the Salar de Atacama where microbial communities are growing in extreme conditions, including high salinity, high solar insolation, and high levels of metals such as lithium, arsenic, magnesium, and calcium...
2017: PloS One
https://www.readbyqxmd.com/read/29140879/metastatic-endocervical-adenocarcinoma-in-a-mature-cystic-teratoma-a-case-of-a-tumor-to-tumor-metastasis
#8
Filipa Santos, Catarina Oliveira, João P Caldeira, Ana Coelho, Ana Félix
Tumor-to-tumor metastasis is a rare phenomenon defined as a to metastasis in a histologically distinct tumor. We report an unusual case of a 51-yr-old woman who presented with a cervical, bleeding lesion diagnosed as a poorly differentiated adenocarcinoma, HPV18+. Imaging studies revealed an unresectable cervical carcinoma with an associated left ovarian multicystic teratoma. A suspicious solid nodule within the teratoma was also reported. Bilateral salpingo-oophorectomy was performed before the cervical tumor was treated...
November 14, 2017: International Journal of Gynecological Pathology
https://www.readbyqxmd.com/read/29140825/recurrent-corneal-erosions-secondary-to-use-of-sleep-mask
#9
Elyse J McGlumphy, Jordan A Margo, Bennie H Jeng
A 31-year-old woman with a history of unusual appearing recurrent linear corneal epithelial defects and subepithelial scaring in both eyes underwent 2 years of evaluation and treatment. It was eventually discovered that the patient was using a sleep mask with excessive fabric pilling, which was found to be the source of her chronic epitheliopathy. After discontinuation of the sleep mask, the patient experienced complete resolution of symptoms. When evaluating recurrent corneal epithelial defects, external sources of repeated trauma, including sleepwear, should be investigated...
November 14, 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/29140087/binuclear-cyclopentadienylmetal-methylene-sulfur-dioxide-complexes-of-rhodium-and-iridium-related-to-a-photochromic-metal-dithionite-complex
#10
Dongsheng Rong, Shida Gong, Chaoyang Wang, Qiong Luo, Qian-Shu Li, Yaoming Xie, R Bruce King, Henry F Schaefer
The photochromic dithionite complex Cp*2Rh2(μ-CH2)2(μ-O2SSO2) (Cp* = η(5)-Me5C5) is of interest because it undergoes an unusual fully reversible unimolecular photochemical rearrangement to the isodithionite complex Cp*2Rh2(μ-CH2)2(μ-O2SOSO). In order to obtain more insight into these systems, a comprehensive density functional theory study has been carried out on isomeric Cp2M2(CH2)2(SO2)2 (M = Rh, Ir) derivatives. The experimentally observed rhodium complexes with coupled sulfur dioxide (SO2) units to give dithionite or isodithionite ligands are surprisingly high-energy kinetic isomers in our analysis, reflecting the need for dithionite rather than SO2 for their synthesis...
November 15, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/29139322/how-pupils-on-the-autism-spectrum-make-sense-of-themselves-in-the-context-of-their-experiences-in-a-mainstream-school-setting-a-qualitative-metasynthesis
#11
Emma I Williams, Kate Gleeson, Bridget E Jones
Evidence that interpersonal interactions and self-appraisal in social context are crucial in developing self-understanding raises concerns about how pupils with autism spectrum disorder make sense of themselves in school settings where many experience social marginalisation. Metasynthesis was used to systematically extract and integrate findings from qualitative studies examining the mainstream school experiences of these students. Synthesised findings identified three, intermeshing, aspects of experience which contribute to many pupils with autism spectrum disorder making sense of themselves as 'different' to typical peers in a negative way: difficulties linked to autism spectrum disorder; interpersonal relationships, particularly with peers; and accessibility of the school environment...
November 1, 2017: Autism: the International Journal of Research and Practice
https://www.readbyqxmd.com/read/29139239/corrigendum-to-mycamoeba-gemmipara-nov-gen-nov-sp-the-first-cultured-member-of-the-environmental-dermamoebidae-clade-lkm74-and-its-unusual-life-cycle-by-blandenier-et%C3%A2-al
#12
(no author information available yet)
No abstract text is available yet for this article.
November 2017: Journal of Eukaryotic Microbiology
https://www.readbyqxmd.com/read/29139159/syntaxin1b-contributes-to-regulation-of-the-dopaminergic-system-through-gaba-transmission-in-the-cns
#13
Tomonori Fujiwara, Takefumi Kofuji, Tatsuya Mishima, Kimio Akagawa
In neuronal plasma membrane, two syntaxin isoforms, HPC-1/syntaxin1A (STX1A) and syntaxin1B (STX1B), are predominantly expressed as soluble N-ethylmaleimide-sensitive fusion attachment protein receptors, also known as t-SNAREs. We previously reported that glutamatergic and GABAergic synaptic transmission is impaired in Stx1b null mutant (Stx1b(-/-) ) mice, but is almost normal in Stx1a null mutant (Stx1a(-/-) ) mice. These observations suggested that STX1A and STX1B have distinct functions in fast synaptic transmission in the central nervous system (CNS)...
November 15, 2017: European Journal of Neuroscience
https://www.readbyqxmd.com/read/29138875/variant-course-of-extensor-pollicis-brevis-tendon-in-the-third-extensor-compartment
#14
Shiro Sugiura, Yusuke Matsuura, Takane Suzuki, Satoru Nishikawa, Chisato Mori, Kazuki Kuniyoshi
INTRODUCTION: According to the anatomical literature, the extensor pollicis brevis (EPB) tendon passes through the first compartment and enters the base of the proximal phalanx of the thumb. There have been a few reports on the different types of supernumerary EPB tendons; however, an unusual course of the EPB tendon is extremely rare. MATERIALS AND METHODS: During routine cadaveric dissection in the Department of Gross Anatomy, we detected an variant EPB muscle in a 96-year-old fresh female cadaver...
November 14, 2017: Surgical and Radiologic Anatomy: SRA
https://www.readbyqxmd.com/read/29138772/mesoporous-silica-nanoparticles-incorporating-squaraine-based-photosensitizers-a-combined-experimental-and-computational-approach
#15
Ivana Miletto, Alberto Fraccarollo, Nadia Barbero, Claudia Barolo, Maurizio Cossi, Leonardo Marchese, Enrica Gianotti
Squaraine dyes, that exhibit intense absorption in the red/near infrared region, have been successfully introduced into mesoporous silica nanoparticles (MSNs) to obtain a nanoplatform for photodynamic therapy. Three brominated squaraine dyes which exhibited good PS performance in solution but a different behaviour in vitro due to cell permeability issues were used as photosensitizers. The effects of the adsorption within the pores of MSNs on the overall UV-Vis-NIR absorption and emission properties as well as on the PS performance was evaluated via a combined experimental and computational physico-chemical approach, which allowed us to correlate the unusual optical properties of two out of three systems with the dimerization of squaraines on the silica surface, with detrimental effects on the PS performance...
November 15, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29138661/intra-articular-knee-arborescent-lipoma-a-case-treated-with-arthroscopic-synoviectomy
#16
Aymen Saidi, Lassaad Hassini, Aymen Fekih, Monia Ben Othmen, Mohamed Allagui, Abderrazek Abid, Issam Aloui
Arborescent lipoma is an unusual intra-articular lesion that typically develops in the knee and has to be evoked before chronic effusion. It corresponds to hyperplasia of mature fatty tissue and hypertrophy of synovial villi, developing within a joint. The reference treatment is synovectomy by arthrotomy. The rare forms localized to the anterior compartment of the knee can benefit from an arthroscopic synovectomy. The authors report a case of arborescent knee lipoma in a 47-year-old patient who received arthroscopic synoviectomy...
2017: Pan African Medical Journal
https://www.readbyqxmd.com/read/29138530/group-2-innate-lymphoid-cells-are-involved-in-skewed-type-2-immunity-of-gastric-diseases-induced-by-helicobacter-pylori-infection
#17
Rong Li, Xiao-Xia Jiang, Lin-Fang Zhang, Xiao-Ming Liu, Ting-Zi Hu, Xiu-Juan Xia, Ming Li, Can-Xia Xu
H. pylori induces a complicated local and systematic immune response and contributes to the carcinogenesis of gastric cancer. A primary type 1 immune response is evoked by H. pylori since its occurrence. However, it is not unusual that an inhibitory immunity is dominant in H. pylori-associated diseases, which are promoted by the formation of immunosuppressive microenvironment. But whether group 2 innate lymphoid cells (ILC2s) plays a critical role in H. pylori-induced skewed type 2 immunity is still unclear...
2017: Mediators of Inflammation
https://www.readbyqxmd.com/read/29138502/crystal-structures-of-the-mitochondrial-deacylase-sirtuin-4-reveal-isoform-specific-acyl-recognition-and-regulation-features
#18
Martin Pannek, Zeljko Simic, Matthew Fuszard, Marat Meleshin, Dante Rotili, Antonello Mai, Mike Schutkowski, Clemens Steegborn
Sirtuins are evolutionary conserved NAD(+)-dependent protein lysine deacylases. The seven human isoforms, Sirt1-7, regulate metabolism and stress responses and are considered therapeutic targets for aging-related diseases. Sirt4 locates to mitochondria and regulates fatty acid metabolism and apoptosis. In contrast to the mitochondrial deacetylase Sirt3 and desuccinylase Sirt5, no prominent deacylase activity and structural information are available for Sirt4. Here we describe acyl substrates and crystal structures for Sirt4...
November 15, 2017: Nature Communications
https://www.readbyqxmd.com/read/29138482/valgamicin-c-a-novel-cyclic-depsipeptide-containing-the-unusual-amino-acid-cleonine-and-related-valgamicins-a-t-and-v-produced-by-amycolatopsis-sp-ml1-hf4
#19
Hideki Hashizume, Kiyoko Iijima, Kazuma Yamashita, Tomoyuki Kimura, Shun-Ichi Wada, Ryuichi Sawa, Masayuki Igarashi
In the course of optimizing pargamicin A production in Amycolatopsis sp. ML1-hF4, we discovered novel cyclic depsipeptide compounds in the broth and designated them valgamicins A, C, T and V. The structures of these molecules were determined by spectroscopic studies, advanced Marfey's method and X-ray crystal structural analysis. Valgamicin C contains the extremely rare amino acid cleonine. To our knowledge, this is the first report of a cleonine-containing metabolite from a naturally isolated microorganism without any breeding or mutation treatment...
November 15, 2017: Journal of Antibiotics
https://www.readbyqxmd.com/read/29138128/will-participatory-syndromic-surveillance-work-in-latin-america-piloting-a-mobile-approach-to-crowdsource-influenza-like-illness-data-in-guatemala
#20
José Tomás Prieto, Jorge H Jara, Juan Pablo Alvis, Luis R Furlan, Christian Travis Murray, Judith Garcia, Pierre-Jean Benghozi, Susan Cornelia Kaydos-Daniels
BACKGROUND: In many Latin American countries, official influenza reports are neither timely nor complete, and surveillance of influenza-like illness (ILI) remains thin in consistency and precision. Public participation with mobile technology may offer new ways of identifying nonmedically attended cases and reduce reporting delays, but no published studies to date have assessed the viability of ILI surveillance with mobile tools in Latin America. We implemented and assessed an ILI-tailored mobile health (mHealth) participatory reporting system...
November 14, 2017: JMIR Public Health and Surveillance
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