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https://www.readbyqxmd.com/read/28329908/re-evaluating-the-roles-of-myosin-18a%C3%AE-and-f-actin-in-determining-golgi-morphology
#1
Kyle Bruun, Jordan R Beach, Sarah M Heissler, Kirsten Remmert, James R Sellers, John A Hammer
The peri-centrosomal localization and morphology of the Golgi apparatus depends largely on the microtubule cytoskeleton and the microtubule motor protein dynein. Recent studies proposed that myosin 18Aα (M18Aα) also contributes to Golgi morphology by binding the Golgi protein GOLPH3 and walking along adjacent actin filaments to stretch the Golgi into its classic ribbon structure. Biochemical analyses have shown, however, that M18A is not an actin-activated ATPase and lacks motor activity. Our goal, therefore, was to define the precise molecular mechanism by which M18Aα determines Golgi morphology...
March 22, 2017: Cytoskeleton
https://www.readbyqxmd.com/read/28315975/spatial-patterns-and-frequency-distributions-of-regional-deformation-in-the-healthy-human-lung
#2
Daniel E Hurtado, Nicolás Villarroel, Carlos Andrade, Jaime Retamal, Guillermo Bugedo, Alejandro Bruhn
Understanding regional deformation in the lung has long attracted the medical community, as parenchymal deformation plays a key role in respiratory physiology. Recent advances in image registration make it possible to noninvasively study regional deformation, showing that volumetric deformation in healthy lungs follows complex spatial patterns not necessarily shared by all subjects, and that deformation can be highly anisotropic. In this work, we systematically study the regional deformation in the lungs of eleven human subjects by means of in vivo image-based biomechanical analysis...
March 18, 2017: Biomechanics and Modeling in Mechanobiology
https://www.readbyqxmd.com/read/28288000/age-associated-chromatin-relaxation-is-enhanced-in-huntington-s-disease-mice
#3
Myungsun Park, Byungkuk Min, Kyuheum Jeon, Sunwha Cho, Jung Sun Park, Jisun Kim, Jeha Jeon, Jinhoi Song, Seokho Kim, Sangkyun Jeong, Hyemyung Seo, Yong-Kook Kang
Expansion of polyglutamine stretch in the huntingtin (HTT) protein is a major cause of Huntington's disease (HD). The polyglutamine part in HTT interacts with various proteins implicated in epigenetic regulation of genes, suggesting that mutant HTT may disturb the integrity of the epigenetic system. Here, we used a PCRseq-based method to examine expression profile of 395 exonic segments from 260 "epi-driver" genes in splenic T lymphocytes from aged HD mice. We identified 67 exonic segments differentially expressed between young and aged HD mice, most of them upregulated in the aged...
March 12, 2017: Aging
https://www.readbyqxmd.com/read/28278518/the-actin-regulator-zyxin-reinforces-airway-smooth-muscle-and-accumulates-in-airways-of-fatal-asthmatics
#4
Sonia R Rosner, Christopher D Pascoe, Elizabeth Blankman, Christopher C Jensen, Ramaswamy Krishnan, Alan L James, John G Elliot, Francis H Green, Jeffrey C Liu, Chun Y Seow, Jin-Ah Park, Mary C Beckerle, Peter D Paré, Jeffrey J Fredberg, Mark A Smith
Bronchospasm induced in non-asthmatic human subjects can be easily reversed by a deep inspiration (DI) whereas bronchospasm that occurs spontaneously in asthmatic subjects cannot. This physiological effect of a DI has been attributed to the manner in which a DI causes airway smooth muscle (ASM) cells to stretch, but underlying molecular mechanisms-and their failure in asthma-remain obscure. Using cells and tissues from wild type and zyxin-/- mice we report responses to a transient stretch of physiologic magnitude and duration...
2017: PloS One
https://www.readbyqxmd.com/read/28273134/gene-set-meta-analysis-of-lung-cancer-identifies-pathway-related-to-systemic-lupus-erythematosus
#5
Albert Rosenberger, Melanie Sohns, Stefanie Friedrichs, Rayjean J Hung, Gord Fehringer, John McLaughlin, Christopher I Amos, Paul Brennan, Angela Risch, Irene Brüske, Neil E Caporaso, Maria Teresa Landi, David C Christiani, Yongyue Wei, Heike Bickeböller
INTRODUCTION: Gene-set analysis (GSA) is an approach using the results of single-marker genome-wide association studies when investigating pathways as a whole with respect to the genetic basis of a disease. METHODS: We performed a meta-analysis of seven GSAs for lung cancer, applying the method META-GSA. Overall, the information taken from 11,365 cases and 22,505 controls from within the TRICL/ILCCO consortia was used to investigate a total of 234 pathways from the Kyoto Encyclopedia of Genes and Genomes (KEGG) database...
2017: PloS One
https://www.readbyqxmd.com/read/28254749/expression-and-localization-of-pannexin-1-and-calhm1-in-porcine-bladder-and-their-involvement-in-modulating-atp-release
#6
Hafiz Sana-Ur-Rehman, Irit Markus, Kate Hilda Moore, Kylie Jan Mansfield, Lu Liu
ATP release from urinary bladder is vital for afferent signaling. The aims of this study were to localize CALHM1 and pannexin-1 expression and to determine their involvement in mediating ATP release in the bladder. Gene expression by PCR and immunohistochemistry were performed in the porcine bladder. CALHM1 and pannexin-1 mediated ATP release in response to hypotonic solution (0.45% NaCl) induced stretch and extracellular Ca(2+) depletion ([Ca(2+)]0) was measured in isolated urothelial, suburothelial and detrusor muscle cells...
March 2, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/28217413/deformation-response-of-the-iliotibial-band-tensor-fascia-lata-complex-to-clinical-grade-longitudinal-tension-loading-in-vitro
#7
Mark Wilhelm, Omer Matthijs, Kevin Browne, Gesine Seeber, Anja Matthijs, Phillip S Sizer, Jean-Michel Brismée, C Roger James, Kerry K Gilbert
BACKGROUND: Iliotibial Band (ITB) syndrome is a troublesome condition with prevalence as high as 12% in runners. Stretching has been utilized as a conservative treatment. However, there is limited evidence supporting ITB elongation in response to a stretching force. PURPOSE/HYPOTHESES: The purpose of this study was to describe the iliotibial band tensor fascia lata complex (ITBTFLC) tissue elongation response to a simulated clinical stretch in-vitro. The authors hypothesized that the ITBTFLC would undergo statistically significant elongation when exposed to a clinical-grade stretching regimen, with the majority of the elongation occurring within the proximal ITBTFLC region...
February 2017: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/28177605/replication-protein-a-prohibits-diffusion-of-the-pcna-sliding-clamp-along-single-stranded-dna
#8
Mark Hedglin, Stephen J Benkovic
The replicative polymerases cannot accommodate distortions to the native DNA sequence such as modifications (lesions) to the native template bases from exposure to reactive metabolites and environmental mutagens. Consequently, DNA synthesis on an afflicted template abruptly stops upon encountering these lesions but the replication fork progresses onward, exposing long stretches of the damaged template before eventually stalling. Such arrests may be overcome by translesion DNA synthesis where a specialized TLS polymerases binds to the resident PCNA and replicates the damaged DNA...
February 8, 2017: Biochemistry
https://www.readbyqxmd.com/read/28167188/the-effect-of-kinesio-taping-versus-stretching-techniques-on-muscle-soreness-and-flexibility-during-recovery-from-nordic-hamstring-exercise
#9
Tarik Ozmen, Gokce Yagmur Gunes, Hanife Dogan, Ilyas Ucar, Mark Willems
The purpose of this study was to examine the effects of static stretching, proprioceptive neuromuscular facilitation (PNF) stretching, or kinesio taping (KT) on muscle soreness and flexibility during recovery from exercise. Sixty-five females were randomly assigned to four groups: PNF stretching (n = 15), static stretching (n = 16), KT (n = 17), and control (n = 17). All participants performed nordic hamstring exercise (5 sets of 8 repetitions). In all groups, hamstring flexibility at 24 h and 48 h was not changed from baseline (p > ...
January 2017: Journal of Bodywork and Movement Therapies
https://www.readbyqxmd.com/read/28167182/calf-stretching-in-correct-alignment-an-important-consideration-in-plantar-fasciopathies
#10
Mark Silvester
Stretching of the calf muscles is important in the treatment of plantar fasciopathy. In order to correctly stretch the calf muscles without strain on the plantar fascia the correct alignment of the lower limb should be maintained. A clinical method of achieving this is presented along with a practical guide to assisting the patient to become familiar with correct lower limb alignment.
January 2017: Journal of Bodywork and Movement Therapies
https://www.readbyqxmd.com/read/28160014/the-incidence-and-clinical-outcomes-of-peroneal-nerve-injuries-associated-with-posterolateral-corner-injuries-of-the-knee
#11
T J Ridley, Mark A McCarthy, Matthew J Bollier, Brian R Wolf, Annunziato Amendola
PURPOSE: The purpose of the study was to investigate the incidence of complete and partial peroneal nerve injuries in patients with posterolateral corner (PLC) knee injuries; additionally, to compare patient-reported outcomes among patients with and without peroneal nerve injury and to examine the factors that predict the recovery of nerve function. METHODS: A retrospective chart review was performed to identify patients who underwent PLC reconstruction or repair from 2000 to 2012 with a minimum 6-month clinical follow-up...
February 3, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28132686/decreased-stard10-expression-is-associated-with-defective-insulin-secretion-in-humans-and-mice
#12
Gaelle R Carrat, Ming Hu, Marie-Sophie Nguyen-Tu, Pauline Chabosseau, Kyle J Gaulton, Martijn van de Bunt, Afshan Siddiq, Mario Falchi, Matthias Thurner, Mickaël Canouil, Francois Pattou, Isabelle Leclerc, Timothy J Pullen, Matthew C Cane, Priyanka Prabhala, William Greenwald, Anke Schulte, Piero Marchetti, Mark Ibberson, Patrick E MacDonald, Jocelyn E Manning Fox, Anna L Gloyn, Philippe Froguel, Michele Solimena, Mark I McCarthy, Guy A Rutter
Genetic variants near ARAP1 (CENTD2) and STARD10 influence type 2 diabetes (T2D) risk. The risk alleles impair glucose-induced insulin secretion and, paradoxically but characteristically, are associated with decreased proinsulin:insulin ratios, indicating improved proinsulin conversion. Neither the identity of the causal variants nor the gene(s) through which risk is conferred have been firmly established. Whereas ARAP1 encodes a GTPase activating protein, STARD10 is a member of the steroidogenic acute regulatory protein (StAR)-related lipid transfer protein family...
February 2, 2017: American Journal of Human Genetics
https://www.readbyqxmd.com/read/28128685/scar-remodeling-with-the-association-of-monopolar-capacitive-radiofrequency-electric-stimulation-and-negative-pressure
#13
Giovanni Nicoletti, Paola Perugini, Sara Bellino, Priscilla Capra, Alberto Malovini, Omar Jaber, Marco Tresoldi, Angela Faga
OBJECTIVE: A study was established to objectively assess the effects of low-intensity electromagnetic and electric stimulation plus negative pressure on mature scars. BACKGROUND: Radiofrequency plus negative pressure therapy demonstrated a favorable reorganization and regeneration of the collagen and elastic fibers and was proposed for the treatment of cellulitis and skin stretch marks. METHODS: Twenty-six mature scars in 20 Caucasian patients (15 females and 5 males) were enrolled in the study...
January 24, 2017: Photomedicine and Laser Surgery
https://www.readbyqxmd.com/read/28112683/blood-pressure-associated-polymorphism-controls-arhgap42-expression-via-serum-response-factor-dna-binding
#14
Xue Bai, Kevin D Mangum, Rachel A Dee, George A Stouffer, Craig R Lee, Akinyemi Oni-Orisan, Cam Patterson, Jonathan C Schisler, Anthony J Viera, Joan M Taylor, Christopher P Mack
We recently demonstrated that selective expression of the Rho GTPase-activating protein ARHGAP42 in smooth muscle cells (SMCs) controls blood pressure by inhibiting RhoA-dependent contractility, providing a mechanism for the blood pressure-associated locus within the ARHGAP42 gene. The goals of the current study were to identify polymorphisms that affect ARHGAP42 expression and to better assess ARHGAP42's role in the development of hypertension. Using DNase I hypersensitivity methods and ENCODE data, we have identified a regulatory element encompassing the ARHGAP42 SNP rs604723 that exhibits strong SMC-selective, allele-specific activity...
February 1, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28110118/supporting-fingerprint-identification-assessments-using-a-skin-stretch-model-a-preliminary-study
#15
Rebecca Lee, Bruce Comber, Joshua Abraham, Michael Wagner, Chris Lennard, Xanthe Spindler, Claude Roux
To support fingerprint expert opinion, this research proposes an approach that combines subjective human analysis (as currently applied by fingerprint practitioners) with a statistical test of the result. This approach relies on the hypothesis that there are limits to the distortion caused by skin stretch. Such limits can be modelled by applying a multivariate normal probability density function to the distances and angle formed by a marked ridge characteristic and the two closest neighbouring minutiae. This study presents a model tested on 5 donors in total...
January 5, 2017: Forensic Science International
https://www.readbyqxmd.com/read/28094753/quantifying-cutaneous-adverse-effects-of-systemic-glucocorticoids-in-patients-with-rheumatoid-arthritis-a-cross-sectional-cohort-study
#16
Jonna Amann, Anne-Marie Wessels, Friederike Breitenfeldt, Dörte Huscher, Johannes W J Bijlsma, Johannes W G Jacobs, Frank Buttgereit
OBJECTIVES: EULAR guidelines state that adverse effects (AEs) of glucocorticoid (GC) therapy should be considered and discussed with the patient before treatment is initiated. However, reliable quantitative data, especially on cutaneous AEs of low-to-medium dose GCs are lacking. We performed a study assessing the occurrence of cutaneous AEs of GCs and its association with current and cumulative GC doses in patients with rheumatoid arthritis (RA). METHODS: In a cross-sectional study performed in 2 outpatient rheumatology centres, 381 RA patients were enrolled...
January 15, 2017: Clinical and Experimental Rheumatology
https://www.readbyqxmd.com/read/28079757/pathogenesis-of-abdominal-pain-in-bowel-obstruction-role-of-mechanical-stress-induced-upregulation-of-nerve-growth-factor-in-gut-smooth-muscle-cells
#17
You-Min Lin, Yu Fu, John Winston, Ravi Radhakrishnan, Sushil K Sarna, Li-Yen M Huang, Xuan-Zheng Shi
Abdominal pain is one of the major symptoms in bowel obstruction (BO); its cellular mechanisms remain incompletely understood. We tested the hypothesis that mechanical stress in obstruction upregulates expression of nociception mediator nerve growth factor (NGF) in gut smooth muscle cells (SMCs), and NGF sensitizes primary sensory nerve to contribute to pain in BO. Partial colon obstruction was induced with a silicon band implanted in the distal bowel of Sprague-Dawley rats. Colon-projecting sensory neurons in the dorsal root ganglia (T13 to L2) were identified for patch-clamp and gene expression studies...
April 2017: Pain
https://www.readbyqxmd.com/read/28060510/coordination-dependent-spectroscopic-signatures-of-divalent-metal-ion-binding-to-carboxylate-head-groups-h2-and-he-tagged-vibrational-spectra-of-m-2-%C3%A2-rco2%C3%A2-m-mg-and-ca-r-cd3-cd2cd3-complexes
#18
Joseph W DePalma, Patrick J Kelleher, Laís C Tavares, Mark A Johnson
We explore the intramolecular distortions present in divalent metal ion-carboxylate ion pairs using vibrational spectroscopy of the cryogenically cooled, mass-selected species isolated in the gas phase. The spectral signatures of the C-O stretching modes are identified using the perdeutero isotopologues of the acetate and propionate anions to avoid congestion arising from the CH2 fundamentals. Both Ca(2+) and Mg(2+) are observed to bind in a symmetrical, so-called "bidentate" arrangement to the -CO2¯ group...
January 19, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28045545/multistep-oxidation-of-diethynyl-oligophenylamine-bridged-diruthenium-and-diiron-complexes
#19
Jing Zhang, Shen-Zhen Guo, Yu-Bao Dong, Li Rao, Jun Yin, Guang-Ao Yu, František Hartl, Sheng Hua Liu
Homo-dinuclear nonlinear complexes [{M(dppe)Cp*}2{μ-(-C≡C)2X}] (dppe = 1,2-bis(diphenylphosphino)ethane; Cp* = η(5)-C5Me5; X = triphenylamine (TPA), M = Ru (1a) and Fe (1b); X = N,N,N',N'-tetraphenylphenylene-1,4-diamine (TPPD), M = Ru (2a)) were prepared and characterized by (1)H, (13)C, and (31)P NMR spectroscopy and single-crystal X-ray diffraction (1a, 2a). Attempts to prepare the diiron analogue of 2a were not successful. Experimental data obtained from cyclic voltammetry, square wave voltammetry, UV-vis-NIR (NIR = near-infrared) spectro-electrochemistry, and very informative IR spectro-electrochemistry in the C≡C stretching region, combined with density functional theory calculations, afford to make an emphasizing assessment of the close association between the metal-ethynyl termini and the oligophenylamine bridge core as well as their respective involvement in sequential one-electron oxidations of these complexes...
January 3, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28034301/mechanistic-differences-between-hiv-1-and-siv-nucleocapsid-proteins-and-cross-species-hiv-1-genomic-rna-recognition
#20
Klara Post, Erik D Olson, M Nabuan Naufer, Robert J Gorelick, Ioulia Rouzina, Mark C Williams, Karin Musier-Forsyth, Judith G Levin
BACKGROUND: The nucleocapsid (NC) domain of HIV-1 Gag is responsible for specific recognition and packaging of genomic RNA (gRNA) into new viral particles. This occurs through specific interactions between the Gag NC domain and the Psi packaging signal in gRNA. In addition to this critical function, NC proteins are also nucleic acid (NA) chaperone proteins that facilitate NA rearrangements during reverse transcription. Although the interaction with Psi and chaperone activity of HIV-1 NC have been well characterized in vitro, little is known about simian immunodeficiency virus (SIV) NC...
December 29, 2016: Retrovirology
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