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https://www.readbyqxmd.com/read/28345008/insights-into-the-mechanism-of-membrane-pyrophosphatases-by-combining-experiment-and-computer-simulation
#1
Nita R Shah, Craig Wilkinson, Steven P D Harborne, Ainoleena Turku, Kun-Mou Li, Yuh-Ju Sun, Sarah Harris, Adrian Goldman
Membrane-integral pyrophosphatases (mPPases) couple the hydrolysis of pyrophosphate (PPi) to the pumping of Na(+), H(+), or both these ions across a membrane. Recently solved structures of the Na(+)-pumping Thermotoga maritima mPPase (TmPPase) and H(+)-pumping Vigna radiata mPPase revealed the basis of ion selectivity between these enzymes and provided evidence for the mechanisms of substrate hydrolysis and ion-pumping. Our atomistic molecular dynamics (MD) simulations of TmPPase demonstrate that loop 5-6 is mobile in the absence of the substrate or substrate-analogue bound to the active site, explaining the lack of electron density for this loop in resting state structures...
May 2017: Structural Dynamics (Melville, N.Y.)
https://www.readbyqxmd.com/read/28341744/%C3%AE-arrestin-1-has-an-essential-role-in-neurokinin-1-receptor-mediated-glioblastoma-cell-proliferation-and-g2-m-phase-transition
#2
Yi-Xin Zhang, Xiao-Fang Li, Guo-Qiang Yuan, Hui Hu, Xiao-Yun Song, Jing-Yi Li, Xiao-Kang Miao, Tian-Xiong Zhou, Wen-Le Yang, Xiao-Wei Zhang, Ling-Yun Mou, Rui Wang
Glioblastoma is the most common malignant brain tumor and has a poor prognosis. Tachykinin receptor neurokinin-1 (NK1R) is a promising target in glioblastoma therapy because of its overexpression in human glioblastoma. NK1R agonists promote glioblastoma cell growth, while NK1R antagonists efficiently inhibit cell growth both in vitro and in vivo. However, the molecular mechanisms involved in these effects are incompletely understood. Beta-arrestin (ARRB) is scaffold protein for signaling transducer. Here, we show that the ARRB1-mediated signaling pathway is essential for NK1-mediated glioblastoma cell proliferation...
March 24, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28339613/a-nonsense-mutation-in-ccdc62-gene-is-responsible-for-spermiogenesis-defects-and-male-infertility-in-repro29-repro29-mice%C3%A2
#3
Yuchi Li, Cailing Li, Shouren Lin, Bo Yang, Weiren Huang, Hanwei Wu, Yuanbin Chen, Lihua Yang, Manling Luo, Huan Guo, Jianbo Chen, Tiantian Wang, Qian Ma, Yanli Gu, Lisha Mou, Zhimao Jiang, Jun Xia, Yaoting Gui
Phenotype-driven mutagenesis is an unbiased method to identify novel genes involved in spermatogenesis and other reproductive processes. Male repro29/repro29 mice generated by the Reproductive Genomics Program at the Jackson Laboratory were infertile with deformed sperm and poor motility. Using selected exonic capture and massively parallel sequencing technologies, we identified a nonsense mutation in the exon 6 of coiled-coil domain-containing 62 gene (Ccdc62), which results in a formation of a premature stop codon and a truncated protein...
January 28, 2017: Biology of Reproduction
https://www.readbyqxmd.com/read/28338437/contralateral-peripheral-neurotization-for-a-hemiplegic-hindlimb-after-central-neurological-injury
#4
Mou-Xiong Zheng, Xu-Yun Hua, Su Jiang, Yan-Qun Qiu, Yun-Dong Shen, Wen-Dong Xu
OBJECTIVE Contralateral peripheral neurotization surgery has been successfully applied to rescue motor function of the hemiplegic upper extremity in patients with central neurological injury (CNI). It may contribute to strengthened neural pathways between the contralesional cortex and paretic limbs. However, the effect of this surgery in the lower extremities remains unknown. In the present study the authors explored the effectiveness and safety of contralateral peripheral neurotization in treating a hemiplegic lower extremity following CNI in adult rats...
March 24, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28328947/a-spontaneous-mutation-in-kdsd-a-biosynthesis-gene-for-3-deoxy-d-manno-octulosonic-acid-occurred-in-a-ciprofloxacin-resistant-strain-of-francisella-tularensis-and-caused-a-high-level-of-attenuation-in-murine-models-of-tularemia
#5
Taylor Chance, Jennifer Chua, Ronald G Toothman, Jason T Ladner, Jonathan E Nuss, Jo Lynne Raymond, Fabrice V Biot, Samandra Demons, Lynda Miller, Stephanie Halasohoris, Sherry Mou, Galina Koroleva, Sean Lovett, Gustavo Palacios, Nicholas J Vietri, Patricia L Worsham, Christopher K Cote, Todd M Kijek, Joel A Bozue
Francisella tularensis, a gram-negative facultative intracellular bacterial pathogen, is the causative agent of tularemia and able to infect many mammalian species, including humans. Because of its ability to cause a lethal infection, low infectious dose, and aerosolizable nature, F. tularensis subspecies tularensis is considered a potential biowarfare agent. Due to its in vitro efficacy, ciprofloxacin is one of the antibiotics recommended for post-exposure prophylaxis of tularemia. In order to identify therapeutics that will be efficacious against infections caused by drug resistant select-agents and to better understand the threat, we sought to characterize an existing ciprofloxacin resistant (CipR) mutant in the Schu S4 strain of F...
2017: PloS One
https://www.readbyqxmd.com/read/28325860/economic-costs-of-automated-and-continuous-ambulatory-peritoneal-dialysis-in-taiwan-a-combined-survey-and-retrospective-cohort-analysis
#6
Chao-Hsiun Tang, Yu-Ting Wu, Siao-Yuan Huang, Hsi-Hsien Chen, Ming-Ju Wu, Bang-Gee Hsu, Jer-Chia Tsai, Tso-Hsiao Chen, Yuh-Mou Sue
OBJECTIVES: Taiwan succeeded in raising the proportion of peritoneal dialysis (PD) usage after the National Health Insurance (NHI) payment scheme introduced financial incentives in 2005. This study aims to compare the economic costs between automated PD (APD) and continuous ambulatory PD (CAPD) modalities from a societal perspective. DESIGN AND SETTING: A retrospective cohort of patients receiving PD from the NHI Research Database was identified during 2004-2011...
March 21, 2017: BMJ Open
https://www.readbyqxmd.com/read/28322954/characterization-of-high-yield-exopolysaccharide-produced-by-phyllobacterium-sp-921f-exhibiting-moisture-preserving-properties
#7
Yinping Li, Gaoli Zhang, Chunying Du, Haijin Mou, Jiefen Cui, Huashi Guan, Hueymin Hwang, Peng Wang
A new strain bacteria was isolated and named as Phyllobacterium sp. 921F, due to its high production capacity of exopolysaccharide (EPS). Characterization of physico-chemical properties of the EPS and optimization for high production were conducted to aim at industrial applications. The optimum pH and temperature were 7.0 and 30°C, respectively. The following scale-up fermentation was carried out in 30L bioreactor and amounts of EPS (21.9g/L) were produced. The EPS with a molecular mass of 1082kDa was composed of glucose, galactose, and pyruvate...
March 17, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28322517/materials-for-microfluidic-immunoassays-a-review
#8
REVIEW
Lei Mou, Xingyu Jiang
Conventional immunoassays suffer from at least one of these following limitations: long processing time, high costs, poor user-friendliness, technical complexity, poor sensitivity and specificity. Microfluidics, a technology characterized by the engineered manipulation of fluids in channels with characteristic lengthscale of tens of micrometers, has shown considerable promise for improving immunoassays that could overcome these limitations in medical diagnostics and biology research. The combination of microfluidics and immunoassay can detect biomarkers with faster assay time, reduced volumes of reagents, lower power requirements, and higher levels of integration and automation compared to traditional approaches...
March 21, 2017: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/28320962/genetic-disruption-of-oncogenic-kras-sensitizes-lung-cancer-cells-to-fas-receptor-mediated-apoptosis
#9
Haiwei Mou, Jill Moore, Sunil K Malonia, Yingxiang Li, Deniz M Ozata, Soren Hough, Chun-Qing Song, Jordan L Smith, Andrew Fischer, Zhiping Weng, Michael R Green, Wen Xue
Genetic lesions that activate KRAS account for ∼30% of the 1.6 million annual cases of lung cancer. Despite clinical need, KRAS is still undruggable using traditional small-molecule drugs/inhibitors. When oncogenic Kras is suppressed by RNA interference, tumors initially regress but eventually recur and proliferate despite suppression of Kras Here, we show that tumor cells can survive knockout of oncogenic Kras, indicating the existence of Kras-independent survival pathways. Thus, even if clinical KRAS inhibitors were available, resistance would remain an obstacle to treatment...
March 20, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28319867/phototherapeutic-spectrum-expansion-through-synergistic-effect-of-mesoporous-silica-trio-nanohybrids-against-antibiotic-resistant-gram-negative-bacterium
#10
Yaswanth Kuthati, Ranjith Kumar Kankala, Prabhakar Busa, Shi-Xiang Lin, Jin-Pei Deng, Chung-Yuan Mou, Chia-Hung Lee
The extensive impact of antibiotic resistance has led to the exploration of new anti-bacterial modalities. We designed copper impregnated mesoporous silica nanoparticles (Cu-MSN) with immobilizing silver nanoparticles (SNPs) to apply photodynamic inactivation (PDI) of antibiotic-resistant E. coli. SNPs were decorated over the Cu-MSN surfaces by coordination of silver ions on diamine-functionalized Cu-MSN and further reduced to silver nanoparticles with formalin. We demonstrate that silver is capable of sensitizing the gram-negative bacteria E...
March 7, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28306208/evaluation-of-myocardial-microcirculation-using-intravoxel-incoherent-motion-imaging
#11
Anna Mou, Chen Zhang, Mengying Li, Fengqiang Jin, Qingwei Song, Ailian Liu, Zhiyong Li
PURPOSE: To explore whether cardiac magnetic resonance-intravoxel incoherent motion imaging (MR-IVIM) is feasible for the clinical evaluation of myocardial microcirculation. MATERIALS AND METHODS: The study included 30 patients (with hypertrophic cardiomyopathy, diabetes mellitus, hypertension, or combined diabetes and hypertension) and 34 healthy volunteers. MR-IVIM with a maximum gradient strength of 50 mT/m was performed on the left ventricular short axis (apex, middle, and base), using multiple b values (0-500 s/mm(2) ) on a 3...
March 17, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28306133/injection-of-toll-like-receptor-4-sirna-into-the-ventrolateral-periaqueductal-gray-attenuates-withdrawal-syndrome-in-morphine-dependent-rats
#12
Q F Liu, L Li, Y Q Guo, X Li, Z D Mou, X Wang, G Z Du
We assessed the role of the Toll-like receptor 4 (TLR4) gene in the ventrolateral periaqueductal gray (vlPAG) region of morphine-dependent rats on attenuating withdrawal syndrome, and regulating glutamic acid decarboxylase (GAD67), glutamic acid (Glu), and gamma-aminobutyric acid (GABA). After siRNA-mediated downregulation of TLR4, changes were observed in withdrawal behavior and downstream signaling molecules. Rats were injected into the vlPAG with TLR4 siRNA, followed by intraperitoneal injection of morphine for 5 consecutive days, and then naloxone, and the behavioral indices of morphine withdrawal were observed...
December 1, 2016: Archives Italiennes de Biologie
https://www.readbyqxmd.com/read/28304232/a-systematic-evaluation-of-intraoperative-white-matter-tract-shift-in-pediatric-epilepsy-surgery-using-high-field-mri-and-probabilistic-high-angular-resolution-diffusion-imaging-tractography
#13
Joseph Yuan-Mou Yang, Richard Beare, Marc L Seal, A Simon Harvey, Vicki A Anderson, Wirginia J Maixner
OBJECTIVE Characterization of intraoperative white matter tract (WMT) shift has the potential to compensate for neuronavigation inaccuracies using preoperative brain imaging. This study aimed to quantify and characterize intraoperative WMT shift from the global hemispheric to the regional tract-based scale and to investigate the impact of intraoperative factors (IOFs). METHODS High angular resolution diffusion imaging (HARDI) diffusion-weighted data were acquired over 5 consecutive perioperative time points (MR1 to MR5) in 16 epilepsy patients (8 male; mean age 9...
March 17, 2017: Journal of Neurosurgery. Pediatrics
https://www.readbyqxmd.com/read/28303603/human-il-6-il-17-il-1%C3%AE-and-tnf-%C3%AE-differently-regulate-the-expression-of-pro-inflammatory-related-genes-tissue-factor-and-swine-leukocyte-antigen-class-i-in-porcine-aortic-endothelial-cells
#14
Hanchao Gao, Lu Liu, Yanli Zhao, Hidetaka Hara, Pengfei Chen, Jia Xu, Jia Tang, Ling Wei, Zesong Li, David K C Cooper, Zhiming Cai, Lisha Mou
BACKGROUND: Pro-inflammatory cytokines play important pathological effects in various diseases and allotransplantation; however, their pathological role in xenotransplantation remains elusive. In pig-to-human cell or organ transplantation, whether porcine cells or organs are activated by human cytokines or not as an important question needs to be investigated. METHODS: We investigated the effect of human IL-6, IFN-γ, IL-17, IL-1β, and TNF-α in xenotransplantation using several in vitro models and porcine aortic endothelial cells (PAECs) as target cells...
March 17, 2017: Xenotransplantation
https://www.readbyqxmd.com/read/28302149/identification-and-interaction-analysis-of-key-genes-and-micrornas-in-hepatocellular-carcinoma-by-bioinformatics-analysis
#15
Tong Mou, Di Zhu, Xufu Wei, Tingting Li, Daofeng Zheng, Junliang Pu, Zhen Guo, Zhongjun Wu
BACKGROUND: Hepatocellular carcinoma (HCC) is the most common liver malignancy worldwide. However, present studies of its multiple gene interaction and cellular pathways still could not explain the initiation and development of HCC perfectly. To find the key genes and miRNAs as well as their potential molecular mechanisms in HCC, microarray data GSE22058, GSE25097, and GSE57958 were analyzed. METHODS: The microarray datasets GSE22058, GSE25097, and GSE57958, including mRNA and miRNA profiles, were downloaded from the GEO database and were analyzed using GEO2R...
March 16, 2017: World Journal of Surgical Oncology
https://www.readbyqxmd.com/read/28302138/congenital-giant-left-atrial-appendage-aneurysm-a-case-report
#16
Yan Chen, Yun Mou, Li-Jun Jiang, Shen-Jiang Hu
BACKGROUND: Congenital left atrial appendage aneurysm (LAAA) is a rare cardiac anomaly with potentially serious complications, including life-threatening systemic thromboembolism, atrial tachyarrhythmia, and cardiac dysfunction. Currently, early surgical intervention is generally recommended to prevent these complications. CASE PRESENTATION: We present a case of congenital giant LAAA in a female patient who successfully completed pregnancy and underwent caesarean section with no obvious complications...
March 16, 2017: Journal of Cardiothoracic Surgery
https://www.readbyqxmd.com/read/28301957/can-osteoporosis-increase-the-incidence-of-heart-failure-in-adults
#17
Chiung-Zuan Chiu, Jiann-Horng Yeh, Kou-Gi Shyu, Sheng-Mou Hou, Cheng-Li Lin, Ji-An Liang
BACKGROUNDS: Recent studies have suggested shared comorbidities between heart failure and osteoporosis. In addition, patients with osteoporosis are associated with increased risks of developing cardiovascular disease. METHODS: A retrospective cohort analysis was conducted to determine the association between osteoporosis and heart failure. Data were from the Longitudinal Health Insurance Database 2000 (LHID2000), Taiwan. Patients with newly diagnosed osteoporosis were identified, and osteoporosis-free controls were randomly selected from the general population and frequency-matched according to age, sex, and index year by using the LHID2000...
March 17, 2017: Current Medical Research and Opinion
https://www.readbyqxmd.com/read/28299711/pathological-findings-in-myasthenia-gravis-patients-with-thymic-hyperplasia-and-thymoma
#18
Ping Chen, Ying-Peng Wang, Dan-Lei Mou, Zheng-Yi Li, Qiu-Min Qu, Hong-Yan Wang, Yuan Deng, Xiao-Feng Li, Ting Wang, Xian-Hao Xu, Gang Zhao
Thymectomy is routinely carried out in patients with myasthenia gravis (MG) and thymomas. However, there is still a dispute as to whether MG patients with thymic hyperplasia should undergo thymectomy. We aimed to investigate the pathological findings in the thymus in patients with co-existing MG and thymic hyperplasia or thymomas treated with thymectomy, as well as effects of immunosuppression. Thirty-three patients with MG were selected and grouped accordingly: patients with no thymic abnormalities, patients with thymic hyperplasia, and patients with thymomas...
March 15, 2017: Pathology Oncology Research: POR
https://www.readbyqxmd.com/read/28296280/prevention-of-renal-failure-in-chinese-patients-with-newly-diagnosed-type-2-diabetes-a-cost-effectiveness-analysis
#19
REVIEW
Bin Wu, Suhua Zhang, Houwen Lin, Shan Mou
AIMS: Diabetic kidney disease (DKD) is the second leading cause (16.4%) of end-stage renal disease (ESRD) in China. The current study is to assess the cost effectiveness of preventing DKD in patients with newly diagnosed type 2 diabetes (T2DM) from the Chinese health care perspective. METHODS: A lifetime Markov decision model was developed according to the disease course of DKD. Patients with newly diagnosed T2DM might receive treatment according to one of the following three strategies: "do nothing" strategy (control strategy), treatment with angiotensin-converting enzyme inhibitors (ACEIs) and angiotensin II receptor blockers (ARBs) (universal strategy), or screening for microalbuminuria followed by ACEI/ARB treatment (screening strategy)...
March 10, 2017: Journal of Diabetes Investigation
https://www.readbyqxmd.com/read/28292020/long-non-coding-rna-hnf1a-as1-promotes-hepatocellular-carcinoma-cell-proliferation-by-repressing-nkd1-and-p21-expression
#20
Cong Wang, Lin Mou, Hai-Xia Chai, Feng Wang, Yun-Zhi Yin, Xiao-Yu Zhang
Hepatocellular carcinoma (HCC) is one of the most common cancers worldwide. Recent evidences have demonstrated that long non-coding RNAs (lncRNAs) act as key regulators of tumor development and progression including HCC. In the study, we showed that the expression level of HNF1A-AS1 was up-regulated in HCC cell lines. Furthermore, CCK-8 cell proliferation assays and cell cycle analysis showed that HNF1A-AS1 over-expression facilitated HCC cell proliferation by promoting the cell proliferation and S-phase progression, whereas HNF1A-AS1 knockdown had the opposite effect...
March 7, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
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