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https://www.readbyqxmd.com/read/27910979/efficient-synthesis-of-cysteine-rich-cyclic-peptides-through-intramolecular-native-chemical-ligation-of-n-hnb-cys-peptide-crypto-thioesters
#1
Victor P Terrier, Agnès F Delmas, Vincent Aucagne
We herein introduce a straightforward synthetic route to cysteine-containing cyclic peptides based on the intramolecular native chemical ligation of in situ generated thioesters. Key precursors are N-Hnb-Cys crypto-thioesters, easily synthesized by Fmoc-based SPPS. The strategy is applied to a representative range of naturally occurring cyclic disulfide-rich peptide sequences.
December 2, 2016: Organic & Biomolecular Chemistry
https://www.readbyqxmd.com/read/27908284/obscured-hemorrhagic-pancreatitis-after-orthotopic-heart-transplantation-complicated-with-acute-right-heart-failure-and-hepatic-dysfunction-a-case-report
#2
Ting-Wei Lin, Meng-Ta Tsai, Jun-Neng Roan, Yi-Sheng Liu, Hong-Ming Tsai, Chwan-Yau Luo
BACKGROUND: Pancreatitis is a serious complication after cardiac surgery and can lead to significant morbidities and mortality. The incidence of pancreatitis is even higher in patients undergoing heart transplantation than in those undergoing other cardiac surgeries. Nevertheless, the clinical presentations of pancreatitis are frequently atypical in these patients. CASE PRESENTATION: We report a heart recipient who was complicated with acute right heart failure initially after orthotopic heart transplantation and developed devastating unanticipated hemorrhagic pancreatitis 1 month after the transplantation...
December 1, 2016: Journal of Cardiothoracic Surgery
https://www.readbyqxmd.com/read/27876910/low-sensitivity-of-the-immunocardstat-%C3%A2-crypto-giardia-rapid-assay-test-for-the-detection-of-giardia-and-cryptosporidium-in-fecal-samples-from-children-living-in-libreville-central-africa
#3
M K Bouyou-Akotet, M Owono-Medang, M N Moussavou-Boussougou, M Mabika Mamfoumbi, R Mintsa-Nguema, D P Mawili-Mboumba, M Kombila
Giardiasis and cryptosporidiosis are now recognized as neglected tropical parasitic diseases. The risk of their dissemination  in developing countries, such as Gabon, is increasing, due to urban crowding and poor sanitation. Accurate, simple and rapid diagnosis tools are thus necessary for the estimation of their real burden. The aim of this study was to evaluate the performances of the ImmunocardSTAT(®)Crypto/Giardia Rapid Assay test for the detection of Cryptosporidium (C.) spp. and Giardia (G.) duodenalis in children living in Libreville, Gabon...
December 2016: Journal of Parasitic Diseases: Official Organ of the Indian Society for Parasitology
https://www.readbyqxmd.com/read/27864361/causes-of-male-infertility-a-9-year-prospective-monocentre-study-on-1737-patients-with-reduced-total-sperm-counts
#4
M Punab, O Poolamets, P Paju, V Vihljajev, K Pomm, R Ladva, P Korrovits, M Laan
STUDY QUESTION: What are the primary causes of severe male factor infertility? SUMMARY ANSWER: Although 40% of all patients showed primary causes of infertility, which could be subdivided into three groups based on the severity of their effect, ~75% of oligozoospermia cases remained idiopathic. WHAT IS KNOWN ALREADY: There are few large-scale epidemiological studies analyzing the causes of male factor infertility. STUDY DESIGN, SIZE, DURATION: A prospective clinical-epidemiological study was conducted at the Andrology Centre, Tartu University Hospital between 2005 and 2013, recruiting male partners of couples failing to conceive a child for over ≥12 months...
November 17, 2016: Human Reproduction
https://www.readbyqxmd.com/read/27805411/n-sulfanylethylaminooxybutyramide-seaoxy-a-crypto-thioester-compatible-with-fmoc-solid-phase-peptide-synthesis
#5
Shugo Tsuda, Masayoshi Mochizuki, Ken Sakamoto, Masaya Denda, Hideki Nishio, Akira Otaka, Taku Yoshiya
An N-sulfanylethylaminooxybutyramide (SEAoxy) has been developed as a novel thioester equivalent for native chemical ligation. SEAoxy peptide was straightforwardly synthesized by conventional Fmoc solid-phase peptide synthesis without a problem. Moreover, SEAoxy peptide could be directly applied to native chemical ligation owing to the intramolecular N-to-S acyl shift that releases the peptide-thioester in situ. This methodology was successfully applied to the synthesis of two bioactive peptides.
November 2, 2016: Organic Letters
https://www.readbyqxmd.com/read/27760168/abundance-and-diversity-of-crypto-and-necto-benthic-coastal-fish-are-higher-in-marine-forests-than-in-structurally-less-complex-macroalgal-assemblages
#6
Pierre D Thiriet, Antonio Di Franco, Adrien Cheminée, Paolo Guidetti, Olivier Bianchimani, Solène Basthard-Bogain, Jean-Michel Cottalorda, Hazel Arceo, Joan Moranta, Pierre Lejeune, Patrice Francour, Luisa Mangialajo
In Mediterranean subtidal rocky reefs, Cystoseira spp. (Phaeophyceae) form dense canopies up to 1 m high. Such habitats, called 'Cystoseira forests', are regressing across the entire Mediterranean Sea due to multiple anthropogenic stressors, as are other large brown algae forests worldwide. Cystoseira forests are being replaced by structurally less complex habitats, but little information is available regarding the potential difference in the structure and composition of fish assemblages between these habitats...
2016: PloS One
https://www.readbyqxmd.com/read/27649390/immunopathological-characterization-of-cryptoglandular-anal-fistula-a-pilot-study-investigating-its-pathogenesis
#7
C Ratto, F Litta, D Lucchetti, A Parello, A Boninsegna, V Arena, L Donisi, F Calapà, A Sgambato
AIM: The pathogenesis of cryptoglandular anal fistula (AF) is still under debate. Tissue inflammation could play a primary role. The pathological process of epithelial mesenchymal transition (EMT) might be involved but has never been investigated. METHOD: In a prospective pilot study, 12 patients with an AF had a fistulectomy. The excised track was divided into proximal (intrasphincteric) and distal (extrasphincteric) parts which were subjected to standard histopathological examination...
December 2016: Colorectal Disease: the Official Journal of the Association of Coloproctology of Great Britain and Ireland
https://www.readbyqxmd.com/read/27561753/crypto-watermarking-of-transmitted-medical-images
#8
Ali Al-Haj, Ahmad Mohammad, Alaa' Amer
Telemedicine is a booming healthcare practice that has facilitated the exchange of medical data and expertise between healthcare entities. However, the widespread use of telemedicine applications requires a secured scheme to guarantee confidentiality and verify authenticity and integrity of exchanged medical data. In this paper, we describe a region-based, crypto-watermarking algorithm capable of providing confidentiality, authenticity, and integrity for medical images of different modalities. The proposed algorithm provides authenticity by embedding robust watermarks in images' region of non-interest using SVD in the DWT domain...
August 25, 2016: Journal of Digital Imaging: the Official Journal of the Society for Computer Applications in Radiology
https://www.readbyqxmd.com/read/27451240/mulberry-anthocyanin-biotransformation-by-intestinal-probiotics
#9
Jing-Rong Cheng, Xue-Ming Liu, Zhi-Yi Chen, You-Sheng Zhang, Ye-Hui Zhang
This study was designed to evaluate mulberry anthocyanins bioconversion traits for intestinal probiotics. Five intestinal beneficial bacteria were incubated with mulberry anthocyanins under anaerobic conditions at 37°C, and bacterial β-glucosidase activity and anthocyanin level were determined. Results demonstrated that all strains could convert mulberry anthocyanins to some extent. With high β-glucosidase production capacity, Streptococcus thermophiles GIM 1.321 and Lactobacillus plantarum GIM 1.35 degraded mulberry anthocyanins by 46...
December 15, 2016: Food Chemistry
https://www.readbyqxmd.com/read/27358259/impacts-of-population-growth-urbanisation-and-sanitation-changes-on-global-human-cryptosporidium-emissions-to-surface-water
#10
Nynke Hofstra, Lucie C Vermeulen
Cryptosporidium is a pathogenic protozoan parasite and is a leading cause of diarrhoea worldwide. The concentration of Cryptosporidium in the surface water is a determinant for probability of exposure and the risk of disease. Surface water concentrations are expected to change with population growth, urbanisation and changes in sanitation. The objective of this paper is to assess the importance of future changes in population, urbanisation and sanitation on global human emissions of Cryptosporidium to surface water...
June 15, 2016: International Journal of Hygiene and Environmental Health
https://www.readbyqxmd.com/read/27242491/systemizers-are-better-code-breakers-self-reported-systemizing-predicts-code-breaking-performance-in-expert-hackers-and-na%C3%A3-ve-participants
#11
India Harvey, Samuela Bolgan, Daniel Mosca, Colin McLean, Elena Rusconi
Studies on hacking have typically focused on motivational aspects and general personality traits of the individuals who engage in hacking; little systematic research has been conducted on predispositions that may be associated not only with the choice to pursue a hacking career but also with performance in either naïve or expert populations. Here, we test the hypotheses that two traits that are typically enhanced in autism spectrum disorders-attention to detail and systemizing-may be positively related to both the choice of pursuing a career in information security and skilled performance in a prototypical hacking task (i...
2016: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/27234899/atypical-1-4-dihydropyridine-derivatives-an-approach-to-neuroprotection-and-memory-enhancement
#12
REVIEW
Vija Klusa
This mini review is devoted to the design and pharmacological studies of novel atypical 1,4-dihydropyridine (DHP) derivatives which differ to a great extent from the traditional DHPs either by lack of neuronal calcium channel blocking activity and/or inability to protect mitochondrial processes. About 100 new DHP derivatives were screened and the mostly active were selected for detailed studies. The compounds of the series of the amino acid ("free" plus "crypto")-containing DHPs and lipophilic di-cyclic DHPs demonstrated long-lasting neuroprotective and/or memory-enhancing action, particularly at low doses (0...
November 2016: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
https://www.readbyqxmd.com/read/27222331/comparative-evaluation-of-three-methods-microscopic-examination-direct-fluorescent-antibody-assay-and-immunochromatographic-method-for-the-diagnosis-of-giardia-intestinalis-from-stool-specimens
#13
Senem Yaman Karadam, Sema Ertuğ, Hatice Ertabaklar
OBJECTIVE: The aim of this study was to compare direct microscopic examination, direct fluorescent antibody assay (DFA), and the immunochromatographic method (IK) and identify the best suitable method for the diagnosis of Giardia intestinalis. METHODS: In this study, 25 stool samples that had been diagnosed as being infected with G. intestinalis using the native-Lugol and/or formol-ethyl acetate concentration method and 25 non-parasite-infected samples (the control group) were examined...
December 0: Türkiye Parazitolojii Dergisi
https://www.readbyqxmd.com/read/27128925/an-embedded-sensor-node-microcontroller-with-crypto-processors
#14
Goran Panić, Oliver Stecklina, Zoran Stamenković
Wireless sensor network applications range from industrial automation and control, agricultural and environmental protection, to surveillance and medicine. In most applications, data are highly sensitive and must be protected from any type of attack and abuse. Security challenges in wireless sensor networks are mainly defined by the power and computing resources of sensor devices, memory size, quality of radio channels and susceptibility to physical capture. In this article, an embedded sensor node microcontroller designed to support sensor network applications with severe security demands is presented...
2016: Sensors
https://www.readbyqxmd.com/read/27022326/involvement-of-fibroblast-growth-factors-and-their-receptors-in-epididymo-testicular-descent-and-maldescent
#15
REVIEW
Faruk Hadziselimovic
Maldescent of the epididymo-testicular unit can occur as an isolated event or as a component of various syndromes. When part of a syndrome, crypto-epididymis is usually accompanied by other genital and/or extragenital features. Epididymis development is primarily regulated by androgens, and successful epididymo-testicular unit development and descent requires an intact hypothalamic-pituitary-gonadal axis. The developing gonadotropin-releasing hormone system is essential for epididymo-testicular descent and is highly sensitive to reduced fibroblast growth factor (FGF) signaling...
February 2016: Molecular Syndromology
https://www.readbyqxmd.com/read/26878883/native-chemical-ligation-strategy-to-overcome-side-reactions-during-fmoc-based-synthesis-of-c-terminal-cysteine-containing-peptides
#16
Dominique Lelièvre, Victor P Terrier, Agnès F Delmas, Vincent Aucagne
The Fmoc-based solid phase synthesis of C-terminal cysteine-containing peptides is problematic, due to side reactions provoked by the pronounced acidity of the Cα proton of cysteine esters. We herein describe a general strategy consisting of the postsynthetic introduction of the C-terminal Cys through a key chemoselective native chemical ligation reaction with N-Hnb-Cys peptide crypto-thioesters. This method was successfully applied to the demanding peptide sequences of two natural products of biological interest, giving remarkably high overall yields compared to that of a state of the art strategy...
March 4, 2016: Organic Letters
https://www.readbyqxmd.com/read/26610303/genetic-diversity-of-38-insertion-deletion-polymorphisms-in-jewish-populations
#17
J F Ferragut, R Pereira, J A Castro, C Ramon, I Nogueiro, A Amorim, A Picornell
Population genetic data of 38 non-coding biallelic autosomal indels are reported for 466 individuals, representing six populations with Jewish ancestry (Ashkenazim, Mizrahim, Sephardim, North African, Chuetas and Bragança crypto-Jews). Intra-population diversity and forensic parameters values showed that this set of indels was highly informative for forensic applications in the Jewish populations studied. Genetic distance analysis demonstrated that this set of markers efficiently separates populations from different continents, but does not seem effective for molecular anthropology studies in Mediterranean region...
March 2016: Forensic Science International. Genetics
https://www.readbyqxmd.com/read/26480341/synthesis-and-stereochemical-assignment-of-crypto-optically-active-2-h6-neopentane
#18
Ahmad Masarwa, Dennis Gerbig, Liron Oskar, Aharon Loewenstein, Hans Peter Reisenauer, Philippe Lesot, Peter R Schreiner, Ilan Marek
The determination of the absolute configuration of chiral molecules is at the heart of asymmetric synthesis. Here we probe the spectroscopic limits for chiral discrimination with NMR spectroscopy in chiral aligned media and with vibrational circular dichroism spectroscopy of the sixfold-deuterated chiral neopentane. The study of this compound presents formidable challenges since its stereogenicity is only due to small mass differences. For this purpose, we selectively prepared both enantiomers of (2) H6 -1 through a concise synthesis utilizing multifunctional intermediates...
October 26, 2015: Angewandte Chemie
https://www.readbyqxmd.com/read/26337090/pitfalls-in-serological-diagnosis-of-cryptococcus-gattii-infections
#19
COMPARATIVE STUDY
Kathrin Tintelnot, Ferry Hagen, Chang Ok Han, Michael Seibold, Volker Rickerts, Teun Boekhout
The detection of cryptococcal antigen by latex agglutination tests (LATs), enzyme-linked immunoassays (ELISA), or lateral flow assay (LFA) is an important tool for diagnosis of a Cryptococcus infection. Cerebrospinal fluid and/or serum samples of 10 patients with cryptococcosis due to Cryptococcus gattii or a hybrid of Cryptococcus neoformans and C. gattii were examined by three LATs (the IMMY Latex-Crypto(®) test, the Pastorex(TM) Crypto Plus, and the Remel Cryptococcus Antigen Test Kit) and the LFA made by Immuno-Mycologics...
November 2015: Medical Mycology: Official Publication of the International Society for Human and Animal Mycology
https://www.readbyqxmd.com/read/26300912/commentary-portuguese-crypto-jews-the-genetic-heritage-of-a-complex-history
#20
Alexander W Marcus, Emily R Ebel, Daniel A Friedman
No abstract text is available yet for this article.
2015: Frontiers in Genetics
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