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https://www.readbyqxmd.com/read/29222402/elmod1-stimulates-arf6-gtp-hydrolysis-to-stabilize-apical-structures-in-developing-vestibular-hair-cells
#1
Jocelyn F Krey, Rachel A Dumont, Philip A Wilmarth, Larry L David, Kenneth R Johnson, Peter G Barr-Gillespie
Sensory hair cells require control of physical properties of their apical plasma membranes for normal development and function. Members of the ARF small GTPase family regulate membrane trafficking and cytoskeletal assembly in many cells. We identified ELMOD1, a guanine nucleoside triphosphatase activating protein (GAP) for ARF6, as the most highly enriched ARF regulator in hair cells. To characterize ELMOD1 control of trafficking, we analyzed mice of both sexes from a strain lacking functional ELMOD1 (roundabout; rda)...
December 8, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/29221517/urban-rural-disparity-in-helicobacter-pylori-infection-related-upper-gastrointestinal-cancer-in-china-and-the-decreasing-trend-in-parallel-with-socioeconomic-development-and-urbanization-in-an-endemic-area
#2
Xiaoduo Wen, Denggui Wen, Yi Yang, Yuetong Chen, Guiying Wang, Baoen Shan
BACKGROUND: Globally China has the largest urban-rural disparity in socioeconomic development, and the urban-rural difference in upper gastrointestinal cancer (UGIC) is similar to the difference between developed and developing countries. OBJECTIVES: To describe urban-rural disparity in UGIC and to emphasize prevention by socioeconomic development and urbanization in China. METHODS: Age-standardized incidence rates (ASRs) of cancers in 2012 were compared between urban Shijiazhuang city and rural Shexian County, and trends from 2000-2015 in Shexian County were analyzed...
May 2017: Annals of Global Health
https://www.readbyqxmd.com/read/29212973/-refractory-cd20-positive-peripheral-t-cell-lymphoma-showing-loss-of-cd20-expression-after-rituximab-therapy-and-gain-of-cd20-expression-after-administration-of-vorinostat-and-gemcitabine
#3
Kazuaki Teshima, Hideaki Ohyagi, Masaaki Kume, Satsuki Takahashi, Masahiro Saito, Naoto Takahashi
A 79-year-old male patient presented with systemic lymphadenopathy. A lymph node biopsy revealed effacement of the normal nodal architecture with diffuse proliferation of medium-sized atypical lymphoid cells. Southern blot analyses demonstrated rearrangement of the T-cell receptor gene but not the immunoglobulin heavy chain gene. He was diagnosed with CD20-positive peripheral T-cell lymphoma (PTCL), NOS. Although he achieved partial remission after six cycles of R-CHOP, he relapse occurred after 2 months. CD20-negative conversion was confirmed in the lymph node, which was positive for CCR4, and the skin at the time of relapse...
2017: [Rinshō Ketsueki] the Japanese Journal of Clinical Hematology
https://www.readbyqxmd.com/read/29209129/health-disparities-are-associated-with-gastric-cancer-mortality-to-incidence-ratios-in-57-countries
#4
Ming-Chang Tsai, Chi-Chih Wang, Hsiang-Lin Lee, Cheng-Ming Peng, Tzu-Wei Yang, Hsuan-Yi Chen, Wen-Wei Sung, Chun-Che Lin
AIM: To evaluate the association between mortality-to-incidence ratios (MIRs) and health disparities. METHODS: In this study, we used the GLOBOCAN 2012 database to obtain the cancer incidence and mortality data for 57 countries, and combined this information with the World Health Organization (WHO) rankings and total expenditures on health/gross domestic product (e/GDP). The associations between variables and MIRs were analyzed by linear regression analyses and the 57 countries were selected according to their data quality...
November 28, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/29207103/epigenetic-alterations-of-the-igf2-promoter-and-the-effect-of-mir%C3%A2-483%C3%A2-5p-on-its-target-gene-expression-in-esophageal-squamous-cell-carcinoma
#5
Han Zhang, Xiaowei Shi, Weidong Chang, Yingying Li, Li Wang, Linsong Wang
Esophageal squamous cell carcinoma (ESCC) is one of the most widespread malignancies in China. MicroRNAs (miRNAs/miRs) are endogenous evolutionarily‑conserved small non‑coding RNAs that are able to regulate ESCC formation and deterioration by negatively regulating specific target genes. In the present study, the expression levels of miR‑483‑5p and its associated mRNAs were measured by quantitative polymerase chain reaction (PCR) analysis, and the methylation levels of the insulin‑like growth factor 2 (Igf2) promoter were detected via the methylation‑specific PCR method in serum and tissues from patients with ESCC...
November 22, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29206487/role-of-catechins-on-et-1-induced-stimulation-of-pld-and-nadph-oxidase-activities-in-pulmonary-smooth-muscle-cells-determination-of-the-probable-mechanism-by-molecular-docking-studies
#6
Sajal Chakraborti, Jaganmay Sarkar, Rajabrata Bhuyan, Tapati Chakraborti
Treatment of human pulmonary artery smooth muscle cells with ET-1 stimulated PLD and NADPH oxidase activities, which were inhibited upon pretreatment with bosentan (ET-1 receptor antagonist), FIPI (PLD inhibitor), apocynin (NADPH oxidase inhibitor) and EGCG & ECG (catechins having galloyl group), but not EGC & EC (catechins devoid of galloyl group). Herein, we determined the probable mechanism by which the galloyl group containing catechins inhibit ET-1 induced stimulation of PLD activity by molecular docking analyses based on our biochemical studies...
December 5, 2017: Biochemistry and Cell Biology, Biochimie et Biologie Cellulaire
https://www.readbyqxmd.com/read/29203664/structural-insights-into-how-gtp-dependent-conformational-changes-in-a-metallochaperone-ureg-facilitate-urease-maturation
#7
Man Hon Yuen, Yu Hang Fong, Yap Shing Nim, Pak Ho Lau, Kam-Bo Wong
The ability of metallochaperones to allosterically regulate the binding/release of metal ions and to switch protein-binding partners along the metal delivery pathway is essential to the metallation of the metalloenzymes. Urease, catalyzing the hydrolysis of urea into ammonia and carbon dioxide, contains two nickel ions bound by a carbamylated lysine in its active site. Delivery of nickel ions for urease maturation is dependent on GTP hydrolysis and is assisted by four urease accessory proteins UreE, UreF, UreG, and UreH(UreD)...
December 4, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29202093/health-status-and-health-systems-financing-in-the-mena-region-roadmap-to-universal-health-coverage
#8
Eyob Zere Asbu, Maysoun Dimachkie Masri, Amer Kaissi
Background: Since the declaration of the Millennium Development Goals (MDGs) in 1990, many countries of the Middle East and North Africa (MENA) region made some improvements in maternal and child health and in tackling communicable diseases. The transition to the global agenda of Sustainable Development Goals brings new opportunities for countries to move forward toward achieving progress for better health, well-being, and universal health coverage. This study provides a profile of health status and health financing approaches in the MENA region and their implications on universal health coverage...
2017: Global Health Research and Policy
https://www.readbyqxmd.com/read/29201138/implementation-and-use-of-cloud-based-electronic-lab-notebook-in-a-bioprocess-engineering-teaching-laboratory
#9
Erin M Riley, Holly Z Hattaway, P Arthur Felse
Background: Electronic lab notebooks (ELNs) are better equipped than paper lab notebooks (PLNs) to handle present-day life science and engineering experiments that generate large data sets and require high levels of data integrity. But limited training and a lack of workforce with ELN knowledge have restricted the use of ELN in academic and industry research laboratories which still rely on cumbersome PLNs for recordkeeping. We used LabArchives, a cloud-based ELN in our bioprocess engineering lab course to train students in electronic record keeping, good documentation practices (GDPs), and data integrity...
2017: Journal of Biological Engineering
https://www.readbyqxmd.com/read/29199977/structural-insight-into-the-rearrangement-of-the-switch-i-region-in-gtp-bound-g12a-k-ras
#10
Shenyuan Xu, Brian N Long, Gabriel H Boris, Anqi Chen, Shuisong Ni, Michael A Kennedy
K-Ras, a molecular switch that regulates cell growth, apoptosis and metabolism, is activated when it undergoes a conformation change upon binding GTP and is deactivated following the hydrolysis of GTP to GDP. Hydrolysis of GTP in water is accelerated by coordination to K-Ras, where GTP adopts a high-energy conformation approaching the transition state. The G12A mutation reduces intrinsic K-Ras GTP hydrolysis by an unexplained mechanism. Here, crystal structures of G12A K-Ras in complex with GDP, GTP, GTPγS and GppNHp, and of Q61A K-Ras in complex with GDP, are reported...
December 1, 2017: Acta Crystallographica. Section D, Structural Biology
https://www.readbyqxmd.com/read/29199510/regulation-of-rhoa-gtpase-and-novel-target-proteins-for-rock
#11
Eun-Kyoung Choi, Jae-Gyu Kim, Hee-Jun Kim, Jung-Yoon Cho, Hwalrim Jeong, Yohan Park, Rokibul Islam, Cuong Kim Cap, Jae-Bong Park
Rho GTPases play significant roles in cellular function and their activity is regulated by guanine nucleotide exchange factors (GEFs) and GTPase activating proteins (GAPs), providing activation and inactivation of these GTPases, respectively. Active GTP-bound form of RhoA activates its effector proteins while the inactive GDP-bound form of RhoA exists in a RhoA-RhoGDI (guanine nucleotide dissociation inhibitor) complex in the cytosol. In particular, IκB kinase γ IKKγ/NF-κB essential modulator (NEMO) plays a role as a GDI displacement factor (GDF) for RhoA activation through binding to RhoA-RhoGDI complex...
December 3, 2017: Small GTPases
https://www.readbyqxmd.com/read/29198424/the-uterine-fibroid-myoma-tumour-analysis-of-the-global-research-architecture-using-density-equalizing-mapping
#12
Dörthe Brüggmann, Frank Louwen, Tatjana Braun, Doris Klingelhöfer, Jan Bauer, Michael H Bendels, Matthias Bundschuh, David Quarcoo, Jenny Jaque, Eileen M Wanke, David A Groneberg
Uterine fibroids can severely impact a woman's quality of life, result in significant morbidity and are a leading indication for hysterectomy. Many aspects of the disease remain largely obscure. Despite these knowledge gaps, no detailed maps of the global fibroid research architecture have yet been generated. This study used the NewQIS approach to assess worldwide research productivity, encompassing numerous aspects of the scientific output, quality and socioeconomic features. Regression analysis indicated an increase in fibroid research activity in the investigated time periods...
November 15, 2017: Reproductive Biomedicine Online
https://www.readbyqxmd.com/read/29196061/direct-regulation-of-p190rhogef-by-activated-rho-and-rac-gtpases
#13
Olugbenga Dada, Stephen Gutowski, Chad A Brautigam, Zhe Chen, Paul C Sternweis
Rho family GTPases regulate a wide range of cellular processes. This includes cellular dynamics where three subfamilies, Rho, Rac, and Cdc42, are known to regulate cell shape and migration though coordinate action. Activation of Rho proteins largely depends on Rho Guanine nucleotide Exchange Factors (RhoGEFs) through a catalytic Dbl homology (DH) domain linked to a pleckstrin homology (PH) domain that subserves various functions. The PH domains from Lbc RhoGEFs, which specifically activate RhoA, have been shown to bind to activated RhoA...
November 28, 2017: Journal of Structural Biology
https://www.readbyqxmd.com/read/29194269/bibliometric-analysis-of-journals-in-the-field-of-endoscopic-endonasal-surgery-for-pituitary-adenomas
#14
Lei Li, Xiaoye Ma, Sajan Pandey, Aoyuan Fan, Xianyu Deng, Daming Cui
Endoscopic endonasal surgery for pituitary adenomas is being performed more frequently worldwide in the recent years. This first bibliometric analysis was conducted aiming to have a microscopic view of research activities about endoscopic endonasal surgery for pituitary adenomas. The original articles about endoscopic endonasal surgery for pituitary adenomas were extracted from the Web of Science (WoS) and analyzed concerning their distributions. We also explored the potential correlations between publications of different countries and their gross domestic product (GDP) via Pearson correlation test...
November 20, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29193661/the-c2h2-zinc-finger-protein-slzf3-regulates-asa-synthesis-and-salt-tolerance-by-interacting-with-csn5b
#15
Ying Li, Zhuannan Chu, Jinying Luo, Yuhong Zhou, Yujing Cai, Yongen Lu, Junhui Xia, Hanhui Kuang, Zhibiao Ye, Bo Ouyang
Abiotic stresses are a major cause of crop loss. Ascorbic acid (AsA) promotes stress tolerance by scavenging reactive oxygen species (ROS), which accumulate when plants experience abiotic stress. Although the biosynthesis and metabolism of AsA are well established, the genes that regulate these pathways remain largely unexplored. Here, we report on a novel regulatory gene from tomato (Solanum lycopersicum) named SlZF3 that encodes a Cys2/His2-type zinc-finger protein with an EAR repression domain. The expression of SlZF3 was rapidly induced by NaCl treatments...
November 28, 2017: Plant Biotechnology Journal
https://www.readbyqxmd.com/read/29189096/regulation-and-functions-of-rhou-and-rhov
#16
Richard G Hodge, Anne J Ridley
Rho GTPases play central roles in a wide variety of cellular processes, including cytoskeletal dynamics, cell adhesion and cell polarity. RhoU and RhoV are Rho GTPases that have some atypical properties compared with classical Rho family members, such as the presence of N- and C-terminal extension regions, unusual GDP/GTP cycling and post-translational modification by palmitoylation but not prenylation. Their activity and localization is regulated by the N-terminal and C-terminal regions, and so far no GEFs or GAPs have been identified for them...
November 30, 2017: Small GTPases
https://www.readbyqxmd.com/read/29188698/arteriovenous-malformation-of-the-jaws-a-black-hole-for-the-gdp-%C3%A2-a-case-report
#17
Kunal Shah, Badrinarayan Srinivasan, Madanagopalan Ethunandan, Clive Pratt
We report a case of a mandibular arteriovenous malformation in a 3-year-old child, who attended our department, and have carried out a literature review. Clinical relevance: Arteriovenous malformation (AVM) is a rare condition but clinicians need to be aware of it as this lesion can have potentially life-threatening complications due to massive haemorrhage.
May 2017: Dental Update
https://www.readbyqxmd.com/read/29187257/urbanization-economic-development-and-health-evidence-from-china-s-labor-force-dynamic-survey
#18
Hongsheng Chen, Ye Liu, Zhigang Li, Desheng Xue
BACKGROUND: The frequent outbreak of environmental threats in China has resulted in increased criticism regarding the health effects of China's urbanization. Urbanization is a double-edged sword with regard to health in China. Although great efforts have been made to investigate the mechanisms through which urbanization influences health, the effect of both economic development and urbanization on health in China is still unclear, and how urbanization-health (or development-health) relationships vary among different income groups remain poorly understood...
November 29, 2017: International Journal for Equity in Health
https://www.readbyqxmd.com/read/29186469/gdp-l-fucose-is-required-for-boundary-definition-in-plants
#19
Beatriz Gonçalves, Aude Maugarny-Calès, Bernard Adroher, Millán Cortizo, Nero Borrega, Thomas Blein, Alice Hasson, Emilie Gineau, Grégory Mouille, Patrick Laufs, Nicolas Arnaud
The CUP-SHAPED COTYLEDON (CUC) transcription factors control plant boundary formation, thus allowing the emergence of novel growth axes. While the developmental roles of the CUC genes in different organs and across species are well characterized, upstream and downstream events that contribute to their function are still poorly understood. To identify new players in this network, we performed a suppressor screen of CUC2g-m4, a line overexpressing CUC2 that has highly serrated leaves. We identified a mutation that simplifies leaf shape and affects MURUS1 (MUR1), which is responsible for GDP-L-fucose production...
November 25, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/29185849/ras-ubiquitylation-modulates-effector-interactions
#20
Ryan Thurman, Edhriz Siraliev-Perez, Sharon L Campbell
RAS proteins function as molecular switches that regulate cellular growth by cycling between active GTP- and inactive GDP bound states. While RAS activity is modulated by factors (guanine nucleotide exchange and GTPase activating proteins) that control levels of active Ras-GTP, RAS proteins also undergo a number of post-translational modifications that regulate their function. One such modification is ubiquitylation. Monoubiquitylation of KRAS at lysine 147 (mUbRAS) enhances Ras activation and promotes signaling through the RAF and Phosphoinositide 3-Kinase (PI3K) signaling pathways...
November 29, 2017: Small GTPases
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