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https://www.readbyqxmd.com/read/29202929/live-imaging-of-heart-tube-development-in-mouse-reveals-alternating-phases-of-cardiac-differentiation-and-morphogenesis
#1
Kenzo Ivanovitch, Susana Temiño Valbuena, Miguel Torres
During vertebrate heart development two progenitor populations, first and second heart fields (FHF, SHF), sequentially contribute to longitudinal subdivisions of the heart tube (HT), with the FHF contributing the left ventricle and part of the atria, and the SHF the rest of the heart. Here we study the dynamics of cardiac differentiation and morphogenesis by tracking individual cells in live analysis of mouse embryos. We report that during an initial phase, FHF precursors differentiate rapidly to form a cardiac crescent, while limited morphogenesis takes place...
December 5, 2017: ELife
https://www.readbyqxmd.com/read/29178803/the-nmr-chemical-shift-of-a-helium-atom-as-a-probe-for-electronic-structure-of-fh-f-fhf-and-fh2
#2
Elena Yu Tupikina, Alexandra A Efimova, Gleb S Denisov, Peter M Tolstoy
In this work we present the first results of outer electronic shell visualization by using a 3He atom as a probe particle. As model objects we have chosen F-, FH and FH2+ species, as well as hydrogen-bonded complexes FH···F- at various H…F- distances (3.0, 2.5, 2.0, 1.5 and equilibrium one ca. 1.14 Å). The interaction energy of investigated objects with helium atom (CCSD/aug-cc-pVTZ) and helium atom chemical shift (B3LYP/pcS-2) surfaces were calculated and their topological analysis was performed. For comparison, the results of standard quantum mechanical approaches to electronic shell visualization were presented (ESP, ELF, ED, ∇2ED)...
November 27, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/29135037/analytical-hessian-fitting-schemes-for-efficient-determination-of-force-constant-parameters-in-molecular-mechanics
#3
Ruixing Wang, Mikhail Ozhgibesov, Hajime Hirao
Building upon our recently developed partial Hessian fitting (PHF) method (Wang et al., J. Comput. Chem. 2016, 37, 2349), we formulated and implemented two other rapid force-field parameterization schemes called full Hessian fitting (FHF) and internal Hessian fitting (IHF), and comparisons were made among these three parameterization schemes to assess their performance. FHF minimizes deviation between the Hessian matrices in Cartesian coordinates computed by quantum mechanics (QM) and molecular mechanics (MM), to determine the best possible MM force-constant parameters...
November 14, 2017: Journal of Computational Chemistry
https://www.readbyqxmd.com/read/29064495/bifluoride-catalysed-sulfur-vi-fluoride-exchange-reaction-for-the-synthesis-of-polysulfates-and-polysulfonates
#4
Bing Gao, Linda Zhang, Qinheng Zheng, Feng Zhou, Liana M Klivansky, Jianmei Lu, Yi Liu, Jiajia Dong, Peng Wu, K Barry Sharpless
Polysulfates and polysulfonates possess exceptional mechanical properties making them potentially valuable engineering polymers. However, they have been little explored due to a lack of reliable synthetic access. Here we report bifluoride salts (Q(+)[FHF](-), where Q(+) represents a wide range of cations) as powerful catalysts for the sulfur(VI) fluoride exchange (SuFEx) reaction between aryl silyl ethers and aryl fluorosulfates (or alkyl sulfonyl fluorides). The bifluoride salts are significantly more active in catalysing the SuFEx reaction compared to organosuperbases, therefore enabling much lower catalyst-loading (down to 0...
November 2017: Nature Chemistry
https://www.readbyqxmd.com/read/29057809/hepatoprotective-effects-of-kaempferol-3-o-%C3%AE-l-arabinopyranosyl-7-o-%C3%AE-l-rhamnopyranoside-on-d-galactosamine-and-lipopolysaccharide-caused-hepatic-failure-in-mice
#5
Lin Dong, Lei Yin, Hongfeng Quan, Yuankui Chu, Jincai Lu
Fulminant hepatic failure (FHF), associated with high mortality, is characterized by extensive death of hepatocytes and hepatic dysfunction. There is no effective treatment for FHF. Several studies have indicated that flavonoids can protect the liver from different factor-induced injury. Previously, we found that the extracts of Elaeagnus mollis leaves had favorable protective effects on acute liver injury. However, the role and mechanisms behind that was elusive. This study examined the hepatoprotective mechanisms of kaempferol-3-O-α-l-arabinopyranosyl-7-O-α-l-rhamnopyra-noside (KAR), a major flavonol glycoside of E...
October 18, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29027045/characteristics-of-patients-with-fragility-hip-fractures-in-the-northern-kyushu-district-in-japan-a-multicenter-prospective-registry-based-on-an-electronic-data-capture-system
#6
Akiko Oyamada, Yoshihiro Matsumoto, Yoshifumi Wakata, Atsushi Kimura, Ko Ikuta, Kuniyoshi Tsuchiya, Naohisa Tayama, Shinji Tomari, Hisaaki Miyahara, Takao Mae, Hirokazu Shiraishi, Taichi Saito, Takeshi Arizono, Kozo Kaji, Taro Mawatari, Masami Fujiwara, Riku Sakimura, Kunichika Shin, Kenichi Ninomiya, Kazutoshi Nakaie, Yasuaki Antoku, Shoji Tokunaga, Naoki Nakashima, Yukihide Iwamoto, Yasuharu Nakashima
Osteoporosis has become a worldwide public health problem, in part due to the fact that it increases the risk of fragility hip fractures (FHFs). The epidemiological assessment of FHFs is critical for their prevention; however, datasets for FHFs in Japan remain scarce. This was a multicenter, prospective, observational study in the northern district of Kyushu Island. Inclusion criteria were age > 60 years with a diagnosis of FHF and acquisition of clinical data by an electronic data capture system. Of 1294 registered patients, 1146 enrolled in the study...
October 12, 2017: Journal of Bone and Mineral Metabolism
https://www.readbyqxmd.com/read/28953903/interleukin-1%C3%AE-and-interleukin-1%C3%AE-play-a-central-role-in-the-pathogenesis-of-fulminant-hepatic-failure-in-mice
#7
Maya Sultan, Ziv Ben-Ari, Rula Masoud, Orit Pappo, Dror Harats, Yehuda Kamari, Michal Safran
BACKGROUND AND AIMS: Fulminant hepatitis failure (FHF) is marked by the sudden loss of hepatic function, with a severe life-threatening course in persons with no prior history of liver disease. Interleukin (IL)-1α and IL-1β are key inflammatory cytokines but little is known about their role in the development of FHF. The aim of this study was to assess the involvement of IL-1α and IL-1β in the progression of LPS/GalN-induced FHF. METHODS: WT, IL-1α or IL-1β deficient mice were injected with LPS/GalN...
2017: PloS One
https://www.readbyqxmd.com/read/28929144/symmetry-and-dynamics-of-fhf-anion-in-vacuum-in-cd2cl2-and-in-ccl4-ab-initio-md-study-of-fluctuating-solvent-solute-hydrogen-and-halogen-bonds
#8
S A Pylaeva, H Elgabarty, D Sebastiani, P M Tolstoy
FHF(-) anion is a classic example of a central-symmetric strongly hydrogen bonded system that has been intensively investigated both experimentally and theoretically. In this paper we focus on solvent effects on symmetry, structure and dynamics of the anion. The FHF(-) anion is studied in vacuum, dissolved in CH2Cl2 and dissolved in CCl4 by ab initio molecular dynamics simulations. We show that CH2Cl2 molecules form CHF hydrogen bonds with lone pairs of fluorine atoms, while CCl4 molecules form halogen bonds...
October 4, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28758404/lycopene-prevents-mitochondrial-dysfunction-during-d-galactosamine-lipopolysaccharide-induced-fulminant-hepatic-failure-in-albino-rats
#9
Sheik Abdulazeez Sheriff, Shaikhussain Shaik Ibrahim, Thiruvengadam Devaki, Sandipan Chakraborty, Subhash Agarwal, Horacio Pérez-Sánchez
Functional perturbation of mitochondria is associated with fulminant hepatic failure (FHF). d-Galactosamine/lipopolysaccharide (d-GalN/LPS)-induced FHF is a renowned model to evaluate the efficacy of hepatoprotective agents. Lycopene is an antioxidant and phytonutrient from the carotenoid family. The health benefits of lycopene are prominent against cancer and cardiovascular, lung, liver, and skin problems. Recent studies have demonstrated the hepatoprotective, antidyslipidemic, and antioxidant roles of lycopene...
August 21, 2017: Journal of Proteome Research
https://www.readbyqxmd.com/read/28752362/necrostatin-1-protects-against-d-galactosamine-and-lipopolysaccharide-induced-hepatic-injury-by-preventing-tlr4-and-rage-signaling
#10
Seok-Joo Kim, Sun-Mee Lee
Fulminant hepatic failure (FHF) is a life-threatening clinical syndrome results in massive inflammation and hepatocyte death. Necroptosis is a regulated form of necrotic cell death that is emerging as a crucial control point for inflammatory diseases. The kinases receptor interacting protein (RIP) 1 and RIP3 are known as key modulators of necroptosis. In this study, we investigated the impact of necroptosis in the pathogenesis of FHF and molecular mechanisms, particularly its linkage to damage-associated molecular pattern (DAMP)-mediated pattern recognition receptor (PRR) signaling pathways...
December 2017: Inflammation
https://www.readbyqxmd.com/read/28746435/cerebral-hemodynamic-and-metabolic-changes-in-fulminant-hepatic-failure
#11
REVIEW
Fernando Mendes Paschoal, Ricardo de Carvalho Nogueira, Marcelo de Lima Oliveira, Eric Homero Albuquerque Paschoal, Manoel Jacobsen Teixeira, Luiz Augusto Carneiro D'Albuquerque, Edson Bor-Seng-Shu
Intracranial hypertension and brain swelling are a major cause of morbidity and mortality of patients suffering from fulminant hepatic failure (FHF). The pathogenesis of these complications has been investigated in man, in experimental models and in isolated cell systems. Currently, the mechanism underlying cerebral edema and intracranial hypertension in the presence of FHF is multi-factorial in etiology and only partially understood. The aim of this paper is to review the pathophysiology of cerebral hemodynamic and metabolism changes in FHF in order to improve understanding of intracranial dynamics complication in FHF...
July 2017: Arquivos de Neuro-psiquiatria
https://www.readbyqxmd.com/read/28736552/asiatic-acid-exhibits-anti-inflammatory-and-antioxidant-activities-against-lipopolysaccharide-and-d-galactosamine-induced-fulminant-hepatic-failure
#12
Hongming Lv, Zhimin Qi, Sisi Wang, Haihua Feng, Xuming Deng, Xinxin Ci
Inflammation and oxidative stress are essential for the pathogenesis of fulminant hepatic failure (FHF). Asiatic acid (AA), which is a pentacyclic triterpene that widely occurs in various vegetables and fruits, has been reported to possess antioxidant and anti-inflammatory properties. In this study, we investigated the protective effects of AA against lipopolysaccharide (LPS) and d-galactosamine (GalN)-induced FHF and the underlying molecular mechanisms. Our findings suggested that AA treatment effectively protected against LPS/d-GalN-induced FHF by lessening the lethality; decreasing the alanine transaminase and aspartate aminotransferase levels, interleukin (IL)-1β, IL-6, and tumor necrosis factor-α production, malondialdehyde formation, myeloperoxidase level and reactive oxygen species generation (i...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28689774/expression-of-il-1ra-il-6-il-8-il-18-tnf-%C3%AE-and-ifn-%C3%AE-genes-in-peripheral-blood-leukocytes-of-rabbits-infected-with-rhdv-rabbit-haemorrhagic-disease-virus
#13
Alicja Trzeciak-Ryczek, Beata Tokarz-Deptuła, Wiesław Deptuła
Rabbit haemorrhagic disease virus (RHDV) induces a highly contagious and extremely lethal disease that fulfils many requirements of an animal model of fulminant hepatic failure (FHF); however, the pathogenesis of RHD has still not been fully elucidated. Cytokines play an important role in regulation of the immune response and pathogenesis of many diseases, including those caused by viral infections. Furthermore, recent studies indicate a role of the immune response, especially peripheral blood leukocytes (PBL), in the pathogenesis of RHD...
July 8, 2017: Developmental and Comparative Immunology
https://www.readbyqxmd.com/read/28686449/multicomponent-density-functional-theory-impact-of-nuclear-quantum-effects-on-proton-affinities-and-geometries
#14
Kurt R Brorsen, Yang Yang, Sharon Hammes-Schiffer
Nuclear quantum effects such as zero point energy play a critical role in computational chemistry and often are included as energetic corrections following geometry optimizations. The nuclear-electronic orbital (NEO) multicomponent density functional theory (DFT) method treats select nuclei, typically protons, quantum mechanically on the same level as the electrons. Electron-proton correlation is highly significant, and inadequate treatments lead to highly overlocalized nuclear densities. A recently developed electron-proton correlation functional, epc17, has been shown to provide accurate nuclear densities for molecular systems...
July 14, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28642930/a-novel-etching-technique-for-surface-treatment-of-zirconia-ceramics-to-improve-adhesion-of-resin-based-luting-cements
#15
Eystein Ivar Ruyter, Nalini Vajeeston, Torbjørn Knarvang, Ketil Kvam
Objectives: Bonding of zirconia crowns and bridges to abutments is important, not only bonding of the thin resin layer to the abutment, but also bonding to the zirconia ceramic is crucial. Both mechanical and chemical adhesion are desired. Mechanical retention of dental porcelain achieved by etching with moderately concentrated hydrofluoric acid is not possible with zirconia ceramics. The purpose of this study was to show that etching is possible with relative low melting fluoride compounds such as ammonium hydrogen difluoride and potassium hydrogen difluoride...
January 2017: Acta Biomaterialia Odontologica Scandinavica
https://www.readbyqxmd.com/read/28583539/prognostic-factors-predicting-poor-outcome-in-living-donor-liver-transplantation-for-fulminant-hepatic-failure
#16
T-S Kim, J M Kim, C H D Kwon, S J Kim, J-W Joh, S-K Lee
BACKGROUND: Living-donor liver transplantation (LDLT) has been accepted as feasible treatment for fulminant hepatic failure (FHF), although it has generated several debatable issues. In this study, we investigated the prognostic factors predicting fatal outcome after LDLT for FHF. METHODS: From April 1999 to April 2011, 60 patients underwent LT for acute liver failure, including 42 patients for FHF at Samsung Medical Center, Seoul, Korea. Among 42 patients, 30 patients underwent LDLT for FHF, and the database of these patients was analyzed retrospectively to investigate the prognostic factors after LDLT for FHF...
June 2017: Transplantation Proceedings
https://www.readbyqxmd.com/read/28579277/autoimmune-severe-acute-fulminant-hepatic-failure-fhf-during-pregnancy
#17
Antonio M Caballero-Mateos, María Ángeles López Garrido, Patricia Becerra Massare, Javier de Teresa Galván
No abstract text is available yet for this article.
June 1, 2017: Gastroenterología y Hepatología
https://www.readbyqxmd.com/read/28447193/ebola-and-marburg-virus-vaccines
#18
REVIEW
Pierce Reynolds, Andrea Marzi
The filoviruses, Ebola virus (EBOV), and Marburg virus (MARV), are among the most pathogenic viruses known to man and the causative agents of viral hemorrhagic fever outbreaks in Africa with case fatality rates of up to 90%. Nearly 30,000 infections were observed in the latest EBOV epidemic in West Africa; previous outbreaks were much smaller, typically only affecting less than a few hundred people. Compared to other diseases such as AIDS or Malaria with millions of cases annually, filovirus hemorrhagic fever (FHF) is one of the neglected infectious diseases...
August 2017: Virus Genes
https://www.readbyqxmd.com/read/28433945/cqmuh-011-a-novel-adamantane-sulfonamide-compound-inhibits-lipopolysaccharide-and-d-galactosamine-induced-fulminant-hepatic-failure-in-mice
#19
Liping Yan, Xiangnan Hu, Qihong Wu, Rong Jiang, Sisi Zhang, Qiao Ling, Hailin Liu, Xuejun Jiang, Jingyuan Wan, Yingju Liu
CQMUH-011, a novel adamantane sulfonamide compound, was shown to suppress macrophage activation and proliferation in our previous study. However, it is unknown whether CQMUH-011 has anti-inflammatory and hepatoprotective properties. In this study, we investigated the potential effects and mechanisms of CQMUH-011 on lipopolysaccharide (LPS)-induced RAW264.7 cell activation in vitro and LPS- and D-galactosamine (D-GalN)-induced fulminant hepatic failure (FHF) in vivo. The results showed that in RAW264.7 cells challenged by LPS, CQMUH-011 inhibited cell proliferation and induced cell cycle arrest and apoptosis...
April 20, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/28224477/genistein-alleviates-neuroinflammation-and-restores-cognitive-function-in-rat-model-of-hepatic-encephalopathy-underlying-mechanisms
#20
Ajaz Ahmad Ganai, Mohammad Husain
Hepatic encephalopathy (HE) is a neuropsychiatric syndrome resulting from acute liver failure. Previously, we demonstrated hepatoprotective effects of genistein in D-galactosamine (D-GalN)-induced fulminant hepatic failure (FHF). In this study, we evaluated behavioural and neuroprotective effects of genistein in rat model of HE. HE was induced by intraperitonial administration of D-GalN (250 mg/kg BW) twice a week for 30 days Genistein was given as co-treatment through oral gavage daily at dose of 5 mg/kg BW...
February 21, 2017: Molecular Neurobiology
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