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https://www.readbyqxmd.com/read/28107677/sensitization-of-melanoma-cells-to-alkylating-agent-induced-dna-damage-and-cell-death-via-orchestrating-oxidative-stress-and-ikk%C3%AE-inhibition
#1
Anfernee Kai-Wing Tse, Ying-Jie Chen, Xiu-Qiong Fu, Tao Su, Ting Li, Hui Guo, Pei-Li Zhu, Hiu-Yee Kwan, Brian Chi-Yan Cheng, Hui-Hui Cao, Sally Kin-Wah Lee, Wang-Fun Fong, Zhi-Ling Yu
Nitrosourea represents one of the most active classes of chemotherapeutic alkylating agents for metastatic melanoma. Treatment with nitrosoureas caused severe systemic side effects which hamper its clinical use. Here, we provide pharmacological evidence that reactive oxygen species (ROS) induction and IKKβ inhibition cooperatively enhance nitrosourea-induced cytotoxicity in melanoma cells. We identified SC-514 as a ROS-inducing IKKβ inhibitor which enhanced the function of nitrosoureas. Elevated ROS level results in increased DNA crosslink efficiency triggered by nitrosoureas and IKKβ inhibition enhances DNA damage signals and sensitizes nitrosourea-induced cell death...
January 12, 2017: Redox Biology
https://www.readbyqxmd.com/read/28107066/hematologic-plasma-biochemical-and-lipid-panel-reference-intervals-in-orange-winged-amazon-parrots-amazona-amazonica
#2
Claire Vergneau-Grosset, Tamsen Polley, Danielle Carrade Holt, William Vernau, Joanne Paul-Murphy
To establish reference intervals in orange-winged Amazon parrots ( Amazona amazonica ) for the complete blood count, plasma biochemical values, and lipid panel and to evaluate age- and sex-related variations, blood samples were obtained from 29 healthy juvenile and adult parrots. Concentrations of total protein, bile acids, phosphorus, total cholesterol, low-density-lipoprotein cholesterol (LDL-C), and high-density lipoprotein cholesterol were significantly higher in adult compared with juvenile birds, while uric acid concentration was significantly higher in juveniles...
December 2016: Journal of Avian Medicine and Surgery
https://www.readbyqxmd.com/read/28106042/diverse-feather-shape-evolution-enabled-by-coupling-anisotropic-signalling-modules-with-self-organizing-branching-programme
#3
Ang Li, Seth Figueroa, Ting-Xin Jiang, Ping Wu, Randall Widelitz, Qing Nie, Cheng-Ming Chuong
Adaptation of feathered dinosaurs and Mesozoic birds to new ecological niches was potentiated by rapid diversification of feather vane shapes. The molecular mechanism driving this spectacular process remains unclear. Here, through morphology analysis, transcriptome profiling, functional perturbations and mathematical simulations, we find that mesenchyme-derived GDF10 and GREM1 are major controllers for the topologies of rachidial and barb generative zones (setting vane boundaries), respectively, by tuning the periodic-branching programme of epithelial progenitors...
January 20, 2017: Nature Communications
https://www.readbyqxmd.com/read/28105228/jagged-2-silencing-inhibits-motility-and-invasiveness-of-colorectal-cancer-cell-lines
#4
Wan He, Charles Ming Lok Chan, Sze Chuen Cesar Wong, Thomas Chi Chuen Au, Wing Shan Ho, Amanda Kit Ching Chan, Andrew Sai Kit Chan, Brigette Buig Yue Ma, Anthony Tak Cheung Chan
Although the Notch pathway has been reported to be activated in colorectal cancer (CRC), limited information is available regarding the expression and role of its ligand, Jagged 2 (JAG2), in CRC. Using immunohistochemistry, the present study demonstrated that JAG2 protein expression may be detected in up to 95% of CRC cases and is 3-fold upregulated in tumor cells compared to surrounding normal tissues. This finding suggests that JAG2 may have a role in the tumorigenicity of CRC. To further investigate the cellular functions of JAG2 expression in CRC, two different small interfering RNAs (siRNAs) were used to downregulate JAG2 expression in CRC cell lines (HCT116, DLD-1 and HT-29)...
December 2016: Oncology Letters
https://www.readbyqxmd.com/read/28104810/the-foxp2-forkhead-domain-binds-to-a-variety-of-dna-sequences-with-different-rates-and-affinities
#5
Helen Webb, Olga Steeb, Ashleigh Blane, Lia Rotherham, Shaun Aron, Phillip Machanick, Heini Dirr, Sylvia Fanucchi
FOXP2 is a member of the P subfamily of FOX transcription factors, the DNA binding domain of which is the winged helix forkhead domain. In this work we show that the FOXP2 forkhead domain is able to bind to various DNA sequences, including a novel sequence identified in this work, with different affinities and rates as detected using surface plasmon resonance. Combining the experimental work with molecular docking, we show that high affinity sequences remain bound to the protein for longer, form a greater number of interactions with the protein and induce a greater structural change in the protein than low affinity sequences...
January 18, 2017: Journal of Biochemistry
https://www.readbyqxmd.com/read/28104700/inhibition-of-4ebp-phosphorylation-mediates-the-cytotoxic-effect-of-mtor-kinase-inhibitors-in-aggressive-b-cell-lymphomas
#6
Chengfeng Bi, Xuan Zhang, Ting Lu, Xiaoyan Zhang, Xianhuo Wang, Bin Meng, Huilai Zhang, Ping Wang, Julie M Vose, Wing C Chan, Timothy W McKeithan, Kai Fu
Mechanistic target of rapamycin complex 1 (mTORC1) is a central integrator of nutrient and growth factor inputs that controls cell growth in eukaryotes. The second generation of mTOR kinase inhibitors (TORKi), directly targeting the mTOR catalytic site, are more effective than rapamycin and its analogs in cancer treatment, particularly in inducing apoptosis. However, the mechanism underlying the cytotoxic effect of TORKi remains elusive. Herein, we demonstrated that TORKi-induced apoptosis is predominantly dependent on loss of mTORC1-mediated 4EBP activation...
January 19, 2017: Haematologica
https://www.readbyqxmd.com/read/28104229/computational-analysis-of-the-safe-zone-for-the-antegrade-lag-screw-in-posterior-column-fixation-with-the-anterior-approach-in-acetabular-fracture-a-cadaveric-study
#7
Gu-Hee Jung, Yongkoo Lee, Joon-Woo Kim, Ji-Wan Kim
OBJECTIVE: The fluoroscopically-guided procedure of antegrade posterior lag screw in posterior column fixation through anterior approach is technique-dependent and requires an experienced surgeon. The purpose of this study was to establish the safe zone for the antegrade posterior lag screw by using computational analysis. METHOD: The virtual three-dimensional model of 178 hemi-pelvises was created from the CT data (DICOM format) by using Mimics(®) program, and were used to measure the safe zone of antegrade lag screw fixation on the inner table of the iliac wing, and the largest diameter of cylindrical implant inside safe zone...
January 13, 2017: Injury
https://www.readbyqxmd.com/read/28103531/characterization-of-transcriptome-and-identification-of-biomineralization-genes-in-winged-pearl-oyster-pteria-penguin-mantle-tissue
#8
Haimei Li, Baosuo Liu, Guiju Huang, Sigang Fan, Bo Zhang, Jiaqi Su, Dahui Yu
The winged pearl oyster Pteria penguin is a commercially important marine pearl oyster species, with pearls that are quite different from those of other pearl oysters. Among such species, mantle tissue is the main organ responsible for shell and pearl formation, a biomineralization process that is regulated by a series of genes, most of which remain unknown. In this study, we sequenced and characterized the transcriptome of P. penguin mantle tissue using the HiSeq 2000 sequencing platform. A total of 93,204 unique transcripts were assembled from 51,580,076 quality reads, with a mean length of 608bp, and 40,974 unigenes were annotated...
January 8, 2017: Comparative Biochemistry and Physiology. Part D, Genomics & Proteomics
https://www.readbyqxmd.com/read/28103079/adhd-treatment-in-primary-care
#9
Tanya S Hauck, Cindy Lau, Laura Li Foa Wing, Paul Kurdyak, Karen Tu
BACKGROUND: The aim of this study is to determine the prevalence and characteristics of youth with attention-deficit hyperactivity disorder (ADHD) in Ontario, Canada, and to determine the predictors of psychotropic medication prescriptions in youth with ADHD. METHOD: This is a cross-sectional retrospective chart abstraction of more than 250 000 medical records from youth aged 1 to 24 years in a large geographical region in Ontario, Canada, linked to population-based health administrative data...
January 1, 2017: Canadian Journal of Psychiatry. Revue Canadienne de Psychiatrie
https://www.readbyqxmd.com/read/28102888/genetic-polymorphisms-in-estrogen-metabolic-pathway-associated-with-risks-of-alzheimer-s-disease-evidence-from-a-southern-chinese-population
#10
Lu Hua Chen, Yan Hui Fan, Patrick Yu Ping Kao, Deborah Tip Yin Ho, Joyce Cheuk Tung Ha, Leung Wing Chu, You-Qiang Song
OBJECTIVES: To investigate whether genetic variations on the estrogen metabolic pathway would be associated with risk of Alzheimer's disease (AD). DESIGN: Cross-sectional study. SETTING: Individuals were recruited at the Memory Clinic, Queen Mary Hospital, Hong Kong. PARTICIPANTS: Chinese individuals with (n = 426) and without (n = 350) AD. MEASUREMENTS: All subjects underwent a standardized cognitive assessment and genotyping of four candidate genes on the estrogen metabolic pathway (estrogen receptor α gene (ESR1), estrogen receptor β gene (ESR2), cytochrome P450 19A1 gene (CYP19A1), cytochrome P450 11A1 gene (CYP11A1))...
January 19, 2017: Journal of the American Geriatrics Society
https://www.readbyqxmd.com/read/28101740/improving-parameter-inference-from-frap-data-an-analysis-motivated-by-pattern-formation-in-the-drosophila-wing-disc
#11
Lin Lin, Hans G Othmer
Fluorescence recovery after photobleaching (FRAP) is used to obtain quantitative information about molecular diffusion and binding kinetics at both cell and tissue levels of organization. FRAP models have been proposed to estimate the diffusion coefficients and binding kinetic parameters of species for a variety of biological systems and experimental settings. However, it is not clear what the connection among the diverse parameter estimates from different models of the same system is, whether the assumptions made in the model are appropriate, and what the qualities of the estimates are...
January 18, 2017: Bulletin of Mathematical Biology
https://www.readbyqxmd.com/read/28100020/independent-evolution-of-sexual-dimorphism-and-female-limited-mimicry-in-swallowtail-butterflies-papilio-dardanus-and-p-phorcas
#12
M J T N Timmermans, M J Thompson, S Collins, A P Vogler
Several species of Swallowtail butterflies (genus Papilio) are Batesian mimics that express multiple mimetic female forms, while the males are monomorphic and non-mimetic. The evolution of such sex-limited mimicry may involve sexual dimorphism arising first and mimicry subsequently. Such a stepwise scenario through a non-mimetic, sexually dimorphic stage has been proposed for two closely related sexually dimorphic species; P. phorcas, a non-mimetic species with two female forms, and P. dardanus, a female-limited polymorphic mimetic species...
January 18, 2017: Molecular Ecology
https://www.readbyqxmd.com/read/28099978/association-of-perinatal-risk-factors-with-autism-spectrum-disorder
#13
Darios Getahun, Michael J Fassett, Morgan R Peltier, Deborah A Wing, Anny H Xiang, Vicki Chiu, Steven J Jacobsen
Objective To examine the association between exposures to perinatal factors and autism spectrum disorders (ASD). Study Design A retrospective cohort study of ASD among children born in Kaiser Permanente Southern California hospitals between 1991 and 2009 (n = 594,638). Medical records were used to determine exposure to perinatal (antepartum and intrapartum) complications. ASD was diagnosed using DSM-IV criteria. Multivariable Cox regression was used to estimate hazard ratios (HRs). Result Children with ASD were more likely to be exposed to perinatal complications (HR = 1...
January 18, 2017: American Journal of Perinatology
https://www.readbyqxmd.com/read/28099712/comparison-of-selective-and-non-selective-internal-iliac-artery-embolization-for-abnormal-placentation-with-major-postpartum-hemorrhage
#14
Tsz-Kin Lo, Chun-Hong So, Sik-Wing Yeung, Mimi Fung, Kwai-Ying Lui, Nin-Yuan Pan
No abstract text is available yet for this article.
January 2017: International Journal of Gynaecology and Obstetrics
https://www.readbyqxmd.com/read/28099303/quality-of-life-in-bilateral-vs-unilateral-end-stage-ankle-arthritis-and-outcomes-of-bilateral-vs-unilateral-total-ankle-replacement
#15
Sagar J Desai, Mark Glazebrook, Murray J Penner, Kevin J Wing, Alastair S E Younger, Ellie Pinsker, Timothy R Daniels
BACKGROUND: We performed a retrospective cohort study to compare preoperative health-related quality of life (HRQoL) between patients with bilateral and those with unilateral end-stage ankle arthritis. We also compared midterm outcomes in a subgroup of patients who had undergone staged bilateral total ankle replacement (TAR) with the outcomes in the group treated with unilateral TAR. METHODS: The HRQoL before surgical treatment was compared between 53 patients with bilateral end-stage ankle arthritis identified from the Canadian Orthopaedic Foot and Ankle Society Prospective Ankle Reconstruction Database and 106 patients with unilateral arthritis selected from the same database...
January 18, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/28099060/understanding-medicaid-managed-care-investments-in-members-social-determinants-of-health
#16
Laura Gottlieb, Sara Ackerman, Holly Wing, Rishi Manchanda
Despite widespread interest in addressing social determinants of health (SDH) as a means to improve health and to reduce health care spending, little information is available about how to develop, sustain, and scale nonmedical interventions in diverse payer environments, including Medicaid Managed Care. This study aimed to explore how Medicaid Managed Care Organization (MMCO) leaders interpret their roles and responsibilities around SDH, how they garner resources to develop and sustain interventions to address SDH, and how they perceive the influences of external organizations on related activities...
January 18, 2017: Population Health Management
https://www.readbyqxmd.com/read/28098219/combined-lrrk2-mutation-aging-and-chronic-low-dose-oral-rotenone-as-a-model-of-parkinson-s-disease
#17
Hui-Fang Liu, Philip Wing-Lok Ho, Gideon Chi-Ting Leung, Colin Siu-Chi Lam, Shirley Yin-Yu Pang, Lingfei Li, Michelle Hiu-Wai Kung, David Boyer Ramsden, Shu-Leong Ho
Aging, genetics and environmental toxicity are important etiological factors in Parkinson's disease (PD). However, its pathogenesis remains unclear. A major obstacle is the lack of an appropriate experimental model which incorporates genetic susceptibility, aging and prolonged environmental toxicity. Here, we explored the interplay amongst these factors using mutant LRRK2(R1441G) (leucine-rich-repeat-kinase-2) knockin mice. We found that mutant primary cortical and mesencephalic dopaminergic neurons were more susceptible to rotenone-induced ATP deficiency and cell death...
January 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28097107/surgical-resection-of-localized-hepatocellular-carcinoma-patient-selection-and-special-consideration
#18
REVIEW
Ka Wing Ma, Tan To Cheung
Localized hepatocellular carcinoma (HCC) refers to a solitary or few tumors located within either the left or right hemiliver without evidence of bilobar or extrahepatic spread. This term encompasses a heterogeneous morphology with no regard to stage of prognosis of the disease. Surgical resection remains the mainstay of curative treatment for the localized HCC. Various biochemical and radiological tests constitute an indispensible part of preoperative assessment. Emergence of laparoscopic hepatectomy has brought liver resection into a new era...
2017: Journal of Hepatocellular Carcinoma
https://www.readbyqxmd.com/read/28095860/mouse-models-of-atherosclerosis-a-historical-perspective-and-recent-advances
#19
REVIEW
Yee Ting Lee, Hiu Yu Lin, Yin Wah Fiona Chan, Ka Hou Christien Li, Olivia Tsz Ling To, Bryan P Yan, Tong Liu, Guangping Li, Wing Tak Wong, Wendy Keung, Gary Tse
Atherosclerosis represents a significant cause of morbidity and mortality in both the developed and developing countries. Animal models of atherosclerosis have served as valuable tools for providing insights on its aetiology, pathophysiology and complications. They can be used for invasive interrogation of physiological function and provide a platform for testing the efficacy and safety of different pharmacological therapies. Compared to studies using human subjects, animal models have the advantages of being easier to manage, with controllable diet and environmental risk factors...
January 17, 2017: Lipids in Health and Disease
https://www.readbyqxmd.com/read/28094808/butterfly-eyespot-organiser-in-vivo-imaging-of-the-prospective-focal-cells-in-pupal-wing-tissues
#20
Mayo Iwasaki, Yoshikazu Ohno, Joji M Otaki
Butterfly wing eyespot patterns are determined in pupal tissues by organisers located at the centre of the prospective eyespots. Nevertheless, organiser cells have not been examined cytochemically in vivo, partly due to technical difficulties. Here, we directly observed organiser cells in pupal forewing epithelium via an in vivo confocal fluorescent imaging technique, using 1-h post-pupation pupae of the blue pansy butterfly, Junonia orithya. The prospective eyespot centre was indented from the plane of the ventral tissue surface...
January 17, 2017: Scientific Reports
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