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Shih-Hsin Tu, Yin-Ching Lin, Chi-Cheng Huang, Po-Sheng Yang, Hui-Wen Chang, Chien-Hsi Chang, Chih-Hsiung Wu, Li-Ching Chen, Yuan-Soon Ho
We previously demonstrated that the activation of α9-nicotinic acetylcholine receptor (α9-nAchR) signaling by smoking promotes breast cancer formation. To investigate the downstream signaling molecules involved in α9-nAChR-induced breast tumorigenesis, we used real-time polymerase chain reactions and Western blotting to assess expression of protein phosphatase Mg2+/Mn2+ dependent 1F (PPM1F), a Ser/Thr protein phosphatase, in human breast cancer samples (n=167). Additionally, stable PPM1F-knockdown and -overexpressing cell lines were established to evaluate the function of PPM1F...
October 18, 2016: Oncotarget
Anna Chung-Kwan Tse, Jing-Woei Li, Simon Yuan Wang, Ting-Fung Chan, Keng Po Lai, Rudolf Shiu-Sun Wu
Hypoxia is a global environmental concern and poses a significant threat to aquatic ecosystems, including the sustainability of natural fish populations. The deleterious effects of hypoxia on fish reproductive fitness, as mediated by disruption of sex hormones and gene expression along the Brain-Pituitary-Gonad axis, have been well documented. Recently, we further demonstrated that the observed disruption of steroidogenesis in the ovary of marine medaka Oryzias melastigma is mediated through microRNAs (miRNAs)...
October 8, 2016: Aquatic Toxicology
Yinan Cui, Giacomo Po, Nasr Ghoniem
We demonstrate, through three-dimensional discrete dislocation dynamics simulations, that the complex dynamical response of nano- and microcrystals to external constraints can be tuned. Under load rate control, strain bursts are shown to exhibit scale-free avalanche statistics, similar to critical phenomena in many physical systems. For the other extreme of displacement rate control, strain burst response transitions to quasiperiodic oscillations, similar to stick-slip earthquakes. External load mode control is shown to enable a qualitative transition in the complex collective dynamics of dislocations from self-organized criticality to quasiperiodic oscillations...
October 7, 2016: Physical Review Letters
Hung-Wei Yang, Rung-Ywan Tsai, Jung-Po Chen, Shin-Pon Ju, Jing-Fong Liao, KuoChen Wei, Wei-Lun Zou, Mu-Yi Hua
A simple and accurate device for early detection of malignancies is paramount for prompt treatment and prevention of metastases. In this study, we describe a novel fabrication method for producing an ordered nano-gold-dot array with strong localized surface plasmon resonance (LSPR) and narrow bandwidth. The array was used as an optical bio-sensing chip for the detection of vascular endothelial growth factor (VEGF) in human serum. The biochip was constructed by conjugating an anti-VEGF antibody, a specific bio-recognition element for VEGF, onto the array via the fragment crystallizable (Fc) region of the antibody, ultimately increasing the efficiency of VEGF detection...
October 21, 2016: ACS Applied Materials & Interfaces
Po C Liu, Yi T Lee, Chun Y Wang, Ya-Tang Yang
We describe a low cost, configurable morbidostat for characterizing the evolutionary pathway of antibiotic resistance. The morbidostat is a bacterial culture device that continuously monitors bacterial growth and dynamically adjusts the drug concentration to constantly challenge the bacteria as they evolve to acquire drug resistance. The device features a working volume of ~10 ml and is fully automated and equipped with optical density measurement and micro-pumps for medium and drug delivery. To validate the platform, we measured the stepwise acquisition of trimethoprim resistance in Escherichia coli MG 1655, and integrated the device with a multiplexed microfluidic platform to investigate cell morphology and antibiotic susceptibility...
September 27, 2016: Journal of Visualized Experiments: JoVE
Lívia R Teixeira, Stelio P L Luna, Lídia M Matsubara, Maria L B Cápua, Bianca P C R Santos, Luciane R Mesquita, Luis G Faria, Felipe S Agostinho, Anna Hielm-Björkman
OBJECTIVE To evaluate pain intensity and kinetic variables in dogs with hip dysplasia (HD) treated with acupuncture, carprofen, or a placebo. DESIGN Randomized, controlled clinical study. ANIMALS 54 HD-affected dogs and 16 healthy dogs. PROCEDURES Seven HD-affected dogs were removed from the study. Dogs with HD were treated in a blinded manner for 30 days with acupuncture (once weekly for 5 sessions; n = 15), carprofen (4.4 mg/kg [2.0 mg/lb], PO, q 24 h; n = 16), or placebo capsules containing lactose (1 mg/kg [0...
November 1, 2016: Journal of the American Veterinary Medical Association
Ada Wai Tung Fung, Wai-Chi Chan, Corine Sau-Man Wong, Eric Yu-Hai Chen, Roger Man-Kin Ng, Edwin Ho-Ming Lee, Wing-Chung Chang, Se-Fong Hung, Eric Fuk-Chi Cheung, Pak-Chung Sham, Helen Fung-Kum Chiu, Ming Lam, Tin-Po Chiang, Jim van Os, Joseph Tak-Fai Lau, Glyn Lewis, Paul Bebbington, Linda Chiu Wa Lam
BACKGROUND: Anxiety disorders are prevalent yet under-recognized in late life. We examined the prevalence of anxiety disorders in a representative sample of community dwelling older adults in Hong Kong. METHOD: Data on 1,158 non-demented respondents aged 60-75 years were extracted from the Hong Kong Mental Morbidity survey (HKMMS). Anxiety was assessed with the revised Clinical Interview Schedule (CIS-R). RESULT: One hundred and thirty-seven respondents (11...
October 21, 2016: International Psychogeriatrics
Brody Holohan, Wanil Kim, Tsung-Po Lai, Hirotoshi Hoshiyama, Ning Zhang, Anas M Alazami, Woodring E Wright, M Stephen Meyn, Fowzan S Alkuraya, Jerry W Shay
BACKGROUND: Loss of function in genes required for telomere maintenance result in disorders known as telomeropathies, which are characterized by a pattern of symptoms including generalized and specific lymphocytopenias as well as very short telomere length and disease anticipation. METHODS: Because human LARP7 is the most likely ortholog of the Tetrahymena p65 protein, which is required for telomerase activity in that organism, we investigated the effects of LARP7 silencing in human cells as well as in two distinct families with Alazami syndrome (loss of function of LARP7)...
October 17, 2016: BMC Genomics
Hiroaki Matsuno
BACKGROUND AND OBJECTIVES: Recently, the osteoporosis treatment has attracted attention, and several drugs have been developed. Among these, bisphosphonates (BPs), parathyroid hormone (PTH) and anti-receptor activator of nuclear factor kappa B ligand (RANKL) monoclonal (MAb) denosumab (DMAb) are the major osteoporosis agents. Several studies demonstrated that the effect of osteoporosis agents is evaluated by lumar or hip dual energy X-ray absorptiometry (DXA). However, private clinic commonly use the radial DXA...
October 20, 2016: Drugs in R&D
Lois Choy, Jie Ming Yeo, Vivian Tse, Shing Po Chan, Gary Tse
The mouse is the second mammalian species, after the human, in which substantial amount of the genomic information has been analyzed. With advances in transgenic technology, mutagenesis is now much easier to carry out in mice. Consequently, an increasing number of transgenic mouse systems have been generated for the study of cardiac arrhythmias in ion channelopathies and cardiomyopathies. Mouse hearts are also amenable to physical manipulation such as coronary artery ligation and transverse aortic constriction to induce heart failure, radiofrequency ablation of the AV node to model complete AV block and even implantation of a miniature pacemaker to induce cardiac dyssynchrony...
September 2016: IJC Heart & Vasculature
David Jarrard, Badrinath Konety, Wei Huang, Tracy Downs, Jill Kolesar, Kyung Mann Kim, Tom Havighurst, Joel Slaton, Margaret G House, Howard L Parnes, Howard H Bailey
INTRODUCTION AND OBJECTIVES: Prostate cancer (PCa) represents an important target for chemoprevention given its prolonged natural history and high prevalence. Epidemiologic and laboratory data suggest that vitamin D and genistein (soy isoflavone) may decrease PCa progression. The effect of vitamin D on prostate epithelial cell proliferation and differentiation is well documented and genistein may augment this affect through inhibition of the CYP24 enzyme, which is responsible for intracellular vitamin D metabolism...
2016: American Journal of Clinical and Experimental Urology
Ming Chen, Shun-Ping Chang, Gwo-Chin Ma, Wen-Hsian Lin, Hsin-Fu Chen, Shee-Uan Chen, Horng-Der Tsai, Feng-Po Tsai, Ming-Ching Shen
Preimplantation genetic diagnosis (PGD) is a powerful tool to tackle the transmission of monogenic inherited disorders in families carrying the diseases from generation to generation. It currently remains a challenging task, despite PGD having been developed over 25 years ago. The major difficulty is it does not have an easy and general formula for all mutations. Different gene locus needs individualized, customized design to make the diagnosis accurate enough to be applied on PGD, in which the quantity of DNA is scanty, whereas timely laboratory diagnosis is mandatory if fresh embryo transfer is desired occasionally...
2016: Thrombosis Journal
Dennis Hey, Eugene Tze Chun Lau, Joel-Louis Lim, Denise Choong, Chuen-Seng Tan, Gabriel Ka-Po Liu, Hee-Kit Wong
BACKGROUND CONTEXT: Flexion radiographs have been used to identify cases of spinal instability. However, current methods are not standardized and are not sufficiently sensitive/specific to identify instability. PURPOSE: Introduction of a new slump sitting method for performing lumbar spine flexion radiographs and comparison of the angular range of motions and displacements between the conventional method and this new method. STUDY DESIGN: Prospective study on radiologic evaluation of the lumbar spine flexion range of motions and displacements using dynamic radiographs PATIENT SAMPLE: 60 patients were recruited from a single spine tertiary centre...
October 17, 2016: Spine Journal: Official Journal of the North American Spine Society
Po-Liang Lu, Ya-Ju Hsieh, Jun-En Lin, Jun-Wei Huang, Tsung-Ying Yang, Lin Lin, Sung-Pin Tseng
Although fosfomycin is a treatment option for infections caused by extended-spectrum β-lactamase (ESBL)-producing Enterobacteriaceae, fosfomycin resistance has been documented. To our knowledge, fosfomycin resistance mechanisms in Klebsiella pneumoniae have not been systematically investigated. A total of 108 ESBL-producing K. pneumoniae isolates collected from Kaohsiung Medical University Hospital, Taiwan, from August 2012 to May 2013 were analysed in this study. Pulsed-field gel electrophoresis (PFGE) revealed 64 pulsotypes and six non-typeable isolates, indicating high genetic diversity...
September 30, 2016: International Journal of Antimicrobial Agents
Po-Jui Peng, Pei-Shen Ho, Chia-Kuang Tsai, San-Yuan Huang, Chih-Sung Liang
OBJECTIVES: A number of research studies support the weight loss effects of metformin and topiramate for obese people with schizophrenia. However, only a few studies have addressed the sustainability of the body weight reduction after discontinuation of these drugs. Moreover, head-to-head studies are still lacking. The study aims to evaluate and compare the efficacy of metformin and topiramate in weight reduction and weight maintenance after discontinuation of these drugs in obese people with schizophrenia...
October 18, 2016: Clinical Neuropharmacology
Xianyu Song, Shuangliang Zhao, Shenwen Fang, Yongzhang Ma, Ming Duan
The dissipative particle dynamics (DPD) method is used to investigate the adsorption behavior of PEO-PPO-PEO triblock copolymers at the liquid/solid interface. The effect of molecular architecture on the self-assembled monolayer adsorption of PEO-PPO-PEO triblock copolymers on hydrophobic surfaces is elucidated by adsorption process, film properties, adsorption morphologies, respectively. The adsorption thicknesses on hydrophobic surfaces and diffusion coefficient as well as aggregation number of Pluronic copolymers in aqueous solution observed in our simulations agree well with previous experimental and numerical observations...
October 20, 2016: Langmuir: the ACS Journal of Surfaces and Colloids
Xiaoyang Shi, Hang Xiao, Klaus Lackner, Xi Chen
A great deal of information exists concerning the hydration of ions in bulk water. Much less noticeable, but equally ubiquitous is the hydration of ions holding on to several water molecules in nanoscopic pores or in natural air at low relative humidity. Such hydration of ions with a high ratio of ions to water molecules (up to 1:1) are essential in determining the energetics of many physical and chemical systems. Here we present a quantitative analysis of the energetics of ion hydration in nanopores based on molecular modeling of a series of basic salts associated with different numbers of water molecules...
October 20, 2016: Chemistry: a European Journal
Yu-Ling Chen, Yi-Ting Chen, Cheng-Feng Lo, Ching-I Hsieh, Shang-Yi Chiu, Chang-Yen Wu, Yu-Shan Yeh, Shu-Hsuan Hung, Po-Hao Cheng, Yu-Hsuan Su, Si-Tse Jiang, Hsian-Jean Chin, Yu-Chia Su
Inflammatory bowel disease is a chronic and progressive inflammatory intestinal disease that includes two major types, namely ulcerative colitis and Crohn's disease (CD). CD is characterized by intestinal epithelial hyperplasia and inflammatory cell infiltration. Transfer of CD25(-)CD45RB(hi)CD4(+) (naïve) T cells into immunodeficiency mice induces autoimmune colitis with pathological lesions similar to CD and loss of body weight 4 weeks after cell transfer. However, weight loss neither has sufficient sensitivity nor totally matches the pathological findings of CD...
October 20, 2016: Scientific Reports
Laureano M Alarcón, M de Los Angeles Frías, Marcela A Morini, M Belén Sierra, Gustavo A Appignanesi, E Anibal Disalvo
We employ molecular dynamics simulations to study the hydration properties of Dipalmitoylphosphatidylcholine (DPPC) bilayers, both in the gel and the liquid crystalline states. We show that while the tight hydration centers (PO and CO moieties) are significantly hydrated in both phases, the gel-fluid transition involves significant changes at the second hydration shell, particularly at the buried region between the hydrocarbon tails. Thus, while almost no buried water population exists in the gel state below the carbonyls, this hydrophobic region becomes partially water accesible in the liquid crystalline state...
October 2016: European Physical Journal. E, Soft Matter
Zixin Yong, Po-Jang Hsieh, Dan Milea
Acquired auditory-visual synesthesia (AVS) is a rare neurological sign, in which specific auditory stimulation triggers visual experience. In this study, we used event-related fMRI to explore the brain regions correlated with acquired monocular sound-induced phosphenes, which occurred 2 months after unilateral visual loss due to an ischemic optic neuropathy. During the fMRI session, 1-s pure tones at various pitches were presented to the patient, who was asked to report occurrence of sound-induced phosphenes by pressing one of the two buttons (yes/no)...
October 19, 2016: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
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