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https://www.readbyqxmd.com/read/28934637/igf-system-targeted-therapy-therapeutic-opportunities-for-ovarian-cancer
#1
REVIEW
J A L Liefers-Visser, R A M Meijering, A K L Reyners, A G J van der Zee, S de Jong
The insulin-like growth factor (IGF) system comprises multiple growth factor receptors, including insulin-like growth factor 1 receptor (IGF-1R), insulin receptor (IR) -A and -B. These receptors are activated upon binding to their respective growth factor ligands, IGF-I, IGF-II and insulin, and play an important role in development, maintenance, progression, survival and chemotherapeutic response of ovarian cancer. In many pre-clinical studies anti-IGF-1R/IR targeted strategies proved effective in reducing growth of ovarian cancer models...
September 8, 2017: Cancer Treatment Reviews
https://www.readbyqxmd.com/read/28934505/combining-asymmetric-13c-labeling-and-isotopic-filter-edit-noesy-a-novel-strategy-for-rapid-and-logical-rna-resonance-assignment
#2
Regan M LeBlanc, Andrew P Longhini, Stuart F J Le Grice, Bruce A Johnson, Theodore K Dayie
Although ∼98% of the human genomic output is transcribed as non-protein coding RNA, <2% of the protein data bank structures comprise RNA. This huge structural disparity stems from combined difficulties of crystallizing RNA for X-ray crystallography along with extensive chemical shift overlap and broadened linewidths associated with NMR of RNA. While half of the deposited RNA structures in the PDB were solved by NMR methods, the usefulness of NMR is still limited by the high cost of sample preparation and challenges of resonance assignment...
September 19, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28934480/hydroxyl-radical-footprinting-combined-with-molecular-modeling-identifies-unique-features-of-dna-conformation-and-nucleosome-positioning
#3
Alexey K Shaytan, Hua Xiao, Grigoriy A Armeev, Carl Wu, David Landsman, Anna R Panchenko
Nucleosomes are the most abundant protein-DNA complexes in eukaryotes that provide compaction of genomic DNA and are implicated in regulation of transcription, DNA replication and repair. The details of DNA positioning on the nucleosome and the DNA conformation can provide key regulatory signals. Hydroxyl-radical footprinting (HRF) of protein-DNA complexes is a chemical technique that probes nucleosome organization in solution with a high precision unattainable by other methods. In this work we propose an integrative modeling method for constructing high-resolution atomistic models of nucleosomes based on HRF experiments...
September 19, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28933553/bromide-photo-oxidation-sensitized-to-visible-light-in-consecutive-ion-pairs
#4
Guocan Li, Wesley B Swords, Gerald J Meyer
The titration of bromide into a [Ru(deeb)(bpz)2]2+ (Ru2+, deeb = 4,4'-diethylester-2,2'-bipyridine; bpz = 2,2'-bipyrazine) dichloromethane solution led to the formation of two consecutive ion-paired species, [Ru2+, Br]+ and [Ru2+, 2Br], each with distinct photophysical and electron transfer properties. Formation of the first ion pair was stoichiometric, Keq1 > 106 M1, and the second ion-pair equilibrium was estimated to be Keq2 = 2.4 ± 0.4  105 M‒1. The 1H NMR spectra recorded in deuterated dichloromethane indicated the presence of contact ion-pairs and provided insights into their structures that were complimented by density functional theory calculations...
September 21, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28933158/first-principles-fe-l2-3-edge-and-o-k-edge-xanes-and-xmcd-spectra-for-iron-oxides
#5
Michel Sassi, Carolyn I Pearce, Paul S Bagus, Elke Arenholz, Kevin M Rosso
X-ray absorption near edge structure (XANES) and X-ray magnetic circular dichroism (XMCD) spectroscopies are tools in widespread use for providing detailed local atomic structure, oxidation state, and magnetic structure information for materials and organometallic complexes. Analysis of these spectra for transition metal L-edges is routinely performed on the basis of ligand-field multiplet theory because one- and two-particle mean field ab initio methods typically cannot describe the multiplet structure. Here we show that multireference configuration interaction (MRCI) calculations can satisfactorily reproduce measured XANES spectra for a range of complex iron oxide materials including hematite and magnetite...
September 21, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28933137/rectal-perforation-in-a-42-year-old-woman-due-to-henoch-sch%C3%A3-nlein-purpura-a-case-report
#6
F Almassinokiani, A Mehdizadeh Kashi, A Musavi, S Khodaverdi, K Tahermanesh, S Ariana
Henoch-Schönlein purpura (HSP) is caused by deposition of IgA-containing immune complexes within the blood vessels. HSP mostly occurs in children and is less common in adults. In addition to palpable purpura, arthritis or arthralgia, renal disease and abdominal pain, gastrointestinal symptoms occur in 50% of children. These can be caused by gastrointestinal hemorrhage, bowel ischemia and necrosis, intussusception, and bowel perforation. In adults, intussusception is less frequent than in children. We report a 42-year-old woman referred to our hospital with acute abdominal pain...
September 21, 2017: Reumatismo
https://www.readbyqxmd.com/read/28932853/the-role-of-ligand-redox-non-innocence-in-ring-opening-polymerization-reactions-catalysed-by-bis-imino-pyridine-iron-alkoxide-complexes
#7
K R Delle Chiaie, A B Biernesser, M A Ortuño, B Dereli, D A Iovan, M J T Wilding, B Li, C J Cramer, J A Byers
The reactivity of iron-based ring opening polymerization catalysts is compared when the catalyst is in three different oxidation states. Formally iron(i) monoalkoxide complexes 3a (p-methoxyphenoxide) and 3b (neopentoxide) supported by bis(imino)pyridine ligands were synthesized and investigated as catalysts for the ring opening polymerization and copolymerization of various monomers. For most monomers, 3a and 3b were superior catalysts compared to analogous, formally iron(ii) and iron(iii) complexes (1a/1b and 2a/2b, respectively) for the ring opening polymerization of various cyclic ester and cyclic carbonate monomers...
September 21, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28932846/a-reactive-oxygen-species-generating-cyclooxygenase-2-inhibiting-cancer-stem-cell-potent-tetranuclear-copper-ii-cluster
#8
C Lu, K Laws, A Eskandari, K Suntharalingam
Tetranuclear copper(ii) complexes containing multiple diclofenac and Schiff base moieties, 1-4, are shown to kill bulk cancer cells and cancer stem cells (CSCs) with low micromolar potency. The most effective complex, 1, elicits its cytotoxic effect by elevating the intracellular reactive oxygen species (ROS) levels and inhibiting cyclooxygenase-2 (COX-2) expression.
September 21, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28932832/coexistence-of-long-range-antiferromagnetic-order-and-slow-relaxation-of-the-magnetization-in-the-first-lanthanide-complex-of-a-1-2-4-benzotriazinyl-radical
#9
Ian S Morgan, Akseli Mansikkamäki, Mathieu Rouzières, Rodolphe Clérac, Heikki M Tuononen
The first lanthanide complex of a 1,2,4-benzotriazinyl radical (1), Dy(1)(tbacac)3 (2, tbacac = 2,2,6,6-tetramethyl-3,5-heptane-dionato), was synthesised and found to have an antiferromagnetically ordered ground state with a metamagnetic phase diagram and a critical field of 0.91 T at 1.85 K. The application of a small dc field revealed the single-molecule magnet behaviour of 2, illustrating the coexistence of long-range antiferromagnetic order and slow relaxation of the magnetization.
September 21, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28932814/the-gut-commensal-microbiome-of-drosophila-melanogaster-is-modified-by-the-endosymbiont-wolbachia
#10
Rama K Simhadri, Eva M Fast, Rong Guo, Michaela J Schultz, Natalie Vaisman, Luis Ortiz, Joanna Bybee, Barton E Slatko, Horacio M Frydman
Endosymbiotic Wolbachia bacteria and the gut microbiome have independently been shown to affect several aspects of insect biology, including reproduction, development, life span, stem cell activity, and resistance to human pathogens, in insect vectors. This work shows that Wolbachia bacteria, which reside mainly in the fly germline, affect the microbial species present in the fly gut in a lab-reared strain. Drosophila melanogaster hosts two main genera of commensal bacteria-Acetobacter and Lactobacillus. Wolbachia-infected flies have significantly reduced titers of Acetobacter...
September 2017: MSphere
https://www.readbyqxmd.com/read/28932701/mr-imaging-of-the-traumatic-triangular-fibrocartilaginous-complex-tear
#11
REVIEW
Alex W H Ng, James F Griffith, Cindy S Y Fung, Ryan K L Lee, Cina S L Tong, Clara W Y Wong, Wing Lim Tse, Pak Cheong Ho
Triangular fibrocartilage complex is a major stabilizer of the distal radioulnar joint (DRUJ). However, triangular fibrocartilage complex (TFCC) tear is difficult to be diagnosed on MRI for its intrinsic small and thin structure with complex anatomy. The purpose of this article is to review the anatomy of TFCC, state of art MRI imaging technique, normal appearance and features of tear on MRI according to the Palmar's classification. Atypical tear and limitations of MRI in diagnosis of TFCC tear are also discussed...
August 2017: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/28932681/assessing-neural-tuning-for-object-perception-in-schizophrenia-and-bipolar-disorder-with-multivariate-pattern-analysis-of-fmri-data
#12
Eric A Reavis, Junghee Lee, Jonathan K Wynn, Stephen A Engel, Mark S Cohen, Keith H Nuechterlein, David C Glahn, Lori L Altshuler, Michael F Green
INTRODUCTION: Deficits in visual perception are well-established in schizophrenia and are linked to abnormal activity in the lateral occipital complex (LOC). Related deficits may exist in bipolar disorder. LOC contains neurons tuned to object features. It is unknown whether neural tuning in LOC or other visual areas is abnormal in patients, contributing to abnormal perception during visual tasks. This study used multivariate pattern analysis (MVPA) to investigate perceptual tuning for objects in schizophrenia and bipolar disorder...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28932051/adenoid-ameloblastoma-with-dentinoid-a-rare-hybrid-variant
#13
Harishchandra K Rai, Shaila M Pai, Anitha Dayakar, H Supriya
Odontogenic tumors comprise an unusual group of lesions of the jaw and present diverse histological patterns. Derived from the primordial tooth-forming tissues, they represent a heterogeneous group of lesions that range from hamartomas to benign and malignant neoplasms of variable aggressiveness. Sporadic case reports and diverse complex histogenetic source also defy categorization of odontogenic tumors. Many can be diagnosed accurately based on the distinctive clinical, radiological and histopathological presentation...
May 2017: Journal of Oral and Maxillofacial Pathology: JOMFP
https://www.readbyqxmd.com/read/28931730/determinants-of-spring-migration-departure-decision-in-a-bat
#14
Dina K N Dechmann, M Wikelski, D Ellis-Soto, K Safi, M Teague O'Mara
Migratory decisions in birds are closely tied to environmental cues and fat stores, but it remains unknown if the same variables trigger bat migration. To learn more about the rare phenomenon of bat migration, we studied departure decisions of female common noctules (Nyctalus noctula) in southern Germany. We did not find the fattening period that modulates departure decisions in birds. Female noctules departed after a regular evening foraging session, uniformly heading northeast. As the day of year increased, migratory decisions were based on the interactions among wind speed, wind direction and air pressure...
September 2017: Biology Letters
https://www.readbyqxmd.com/read/28931678/ikk%C3%AE-mimetic-peptides-block-the-resistance-to-apoptosis-associated-with-kshv-infection
#15
Louise C Briggs, A W Edith Chan, Christopher A Davis, Nicholas Whitelock, Hajira A Hotiana, Mehdi Baratchian, Claire Bagnéris, David L Selwood, Mary K Collins, Tracey E Barrett
Primary effusion lymphoma (PEL) is a lymphogenic disorder associated with KSHV infection. Key to the survival and proliferation of PEL is the canonical NF-kB pathway that becomes constitutively activated following overexpression of the viral oncoprotein ks-vFLIP. This arises from its capacity to form a complex with the modulatory subunit of the IKK kinase, IKKγ (or NEMO) resulting in the overproduction of proteins that promote cellular survival and prevent apoptosis; both of which are important drivers of tumourigenesis...
September 20, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28931373/improving-contig-binning-of-metagenomic-data-using-formula-see-text-oligonucleotide-frequency-dissimilarity
#16
Ying Wang, Kun Wang, Yang Young Lu, Fengzhu Sun
BACKGROUND: Metagenomics sequencing provides deep insights into microbial communities. To investigate their taxonomic structure, binning assembled contigs into discrete clusters is critical. Many binning algorithms have been developed, but their performance is not always satisfactory, especially for complex microbial communities, calling for further development. RESULTS: According to previous studies, relative sequence compositions are similar across different regions of the same genome, but they differ between distinct genomes...
September 20, 2017: BMC Bioinformatics
https://www.readbyqxmd.com/read/28931088/an-integrated-nutrition-and-health-program-package-on-iycn-improves-breastfeeding-but-not-complementary-feeding-and-nutritional-status-in-rural-northern-india-a-quasi-experimental-randomized-longitudinal-study
#17
Veena Singh, Saifuddin Ahmed, Michele L Dreyfuss, Usha Kiran, Deepika N Chaudhery, Vinod K Srivastava, Ramesh C Ahuja, Abdullah H Baqui, Gary L Darmstadt, Mathuram Santosham, Keith P West
BACKGROUND: Undernutrition below two years of age remains a major public health problem in India. We conducted an evaluation of an integrated nutrition and health program that aimed to improve nutritional status of young children by improving breast and complementary feeding practices over that offered by the Government of India's standard nutrition and health care program. METHODS: In Uttar Pradesh state, through multi-stage cluster random sampling, 81 villages in an intervention district and 84 villages in a comparison district were selected...
2017: PloS One
https://www.readbyqxmd.com/read/28931083/in-vivo-virulence-of-mhc-adapted-aids-virus-serially-passaged-through-mhc-mismatched-hosts
#18
Sayuri Seki, Takushi Nomura, Masako Nishizawa, Hiroyuki Yamamoto, Hiroshi Ishii, Saori Matsuoka, Teiichiro Shiino, Hironori Sato, Kazuta Mizuta, Hiromi Sakawaki, Tomoyuki Miura, Taeko K Naruse, Akinori Kimura, Tetsuro Matano
CD8+ T-cell responses exert strong suppressive pressure on HIV replication and select for viral escape mutations. Some of these major histocompatibility complex class I (MHC-I)-associated mutations result in reduction of in vitro viral replicative capacity. While these mutations can revert after viral transmission to MHC-I-disparate hosts, recent studies have suggested that these MHC-I-associated mutations accumulate in populations and make viruses less pathogenic in vitro. Here, we directly show an increase in the in vivo virulence of an MHC-I-adapted virus serially-passaged through MHC-I-mismatched hosts in a macaque AIDS model despite a reduction in in vitro viral fitness...
September 20, 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28930946/evaluating-the-traditional-day-and-night-shift-in-an-acute-care-surgery-fellowship-is-the-swing-shift-a-better-choice
#19
Paul J Chestovich, Christopher F McNicoll, Nichole K Ingalls, Deborah A Kuhls, Douglas R Fraser, Shawna L Morrissey, John J Fildes
BACKGROUND: Fellowship trainees in Acute Care Surgery require experience in the management of complex and operative trauma cases. Trauma center staffing usually follows standard 12 or 24 hour shifts, with resident and fellow trainees following a similar schedule. Although trauma admissions can be generally unpredictable, we analyzed temporal trends of trauma patient arrival times to determine the best time frame to maximize trainee experience during each day. METHODS: We reviewed ten years (2007-2016) of trauma registry data for blunt and penetrating trauma activations...
September 20, 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28930630/assessing-the-structure-and-stability-of-transmembrane-oligomeric-intermediates-of-an-%C3%AE-helical-toxin
#20
Rajat Desikan, Prabal K K Maiti, K Ganapathy Ayappa
Protein membrane interactions play an important role in our understanding of diverse phenomena ranging from membrane assisted protein aggregation to oligomerization and folding. Pore forming toxins (PFTs) form the primary vehicle for infection by several strains of bacteria. These proteins expressed in a water soluble form (monomers) bind to the target membrane (protomer) to form a transmembrane pore complex through a process of oligomerization. Based on the structure of the transmembrane domains, PFTs are broadly classified into β or α toxins...
September 20, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
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