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https://www.readbyqxmd.com/read/28222358/tyrosine-kinase-inhibition-is-an-important-factor-for-gene-expression-of-crth2-in-human-eosinophils-and-lymphocytes-a-novel-mechanism-for-explaining-eosinophils-recruitment-by-the-neuro-immune-axis-in-allergic-rhinitis
#1
A E El-Shazly, P Roncarati, M Lejeune, P P Lefebvre, P Delvenne
We recently shown a novel neuro-immune competition between vasoactive intestinal peptide (VIP) and PGD2 for CRTH2 receptor, and that genistein augmented VIP and PGD2-induced eosinophil chemotaxis. However, there are neither studies on the CRTH2 gene expression in allergic rhinitis (AR) nor in the effect of tyrosine kinase inhibitors in CRTH2 gene regulation. Our Objectives were to study the gene expression modulation of CRTH2 receptor in AR patients and the effect of tyrosine kinase inhibitors (TKIs) on CRTH2 gene modulation...
February 18, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/28221249/the-%C3%AE-4%C3%AE-1-homing-pathway-is-essential-for-ileal-homing-of-crohn-s-disease-effector-t-cells-in-vivo
#2
Sebastian Zundler, Anika Fischer, Daniela Schillinger, Marie-Theres Binder, Raja Atreya, Timo Rath, Rocío Lopez-Pósadas, Caroline J Voskens, Alastair Watson, Imke Atreya, Clemens Neufert, Markus F Neurath
BACKGROUND: The precise mechanisms controlling homing of T effector (Teff) cells to the inflamed gut in Crohn's disease (CD) are still unclear, and clinical outcome data from patients with inflammatory bowel disease treated with the anti-α4β7 integrin antibody vedolizumab suggest differences between ulcerative colitis and CD. METHODS: Expression of homing molecules was studied with flow cytometry and immunohistochemistry. Their functional role was investigated in in vitro adhesion assays and in a humanized mouse model of T cell homing to the inflamed gut in vivo...
March 2017: Inflammatory Bowel Diseases
https://www.readbyqxmd.com/read/28220813/foxo1-expression-in-keratinocytes-promotes-connective-tissue-healing
#3
Chenying Zhang, Jason Lim, Jian Liu, Bhaskar Ponugoti, Sarah Alsadun, Chen Tian, Rameen Vafa, Dana T Graves
Wound healing is complex and highly orchestrated. It is well appreciated that leukocytes, particularly macrophages, are essential for inducing the formation of new connective tissue, which requires the generation of signals that stimulate mesenchymal stem cells (MSC), myofibroblasts and fibroblasts. A key role for keratinocytes in this complex process has yet to be established. To this end, we investigated possible involvement of keratinocytes in connective tissue healing. By lineage-specific deletion of the forkhead box-O 1 (FOXO1) transcription factor, we demonstrate for the first time that keratinocytes regulate proliferation of fibroblasts and MSCs, formation of myofibroblasts and production of collagen matrix in wound healing...
February 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28220803/tcf7-is-suppressed-by-the-androgen-receptor-via-microrna-1-mediated-downregulation-and-is-involved-in-the-development-of-resistance-to-androgen-deprivation-in-prostate-cancer
#4
M K Siu, W-Y Chen, H-Y Tsai, H-Y Chen, J J Yin, C-L Chen, Y-C Tsai, Y-N Liu
BACKGROUND: Resistance to androgen deprivation therapy (ADT) represents a key step in the malignant progression of prostate cancer, and mutation to androgen receptor (AR) is one major driver to an androgen-independent phenotype. However, alternative oncogenic pathways that bypass AR signaling have emerged as an important mechanism promoting resistance to ADT. It is known that AR activation can prevent the interaction between β-catenin and T cell factor/lymphoid enhancer-binding factor (TCF/LEF) family, inhibiting the Wnt signaling pathway...
February 21, 2017: Prostate Cancer and Prostatic Diseases
https://www.readbyqxmd.com/read/28220789/stim1-activates-crac-channels-through-rotation-of-the-pore-helix-to-open-a-hydrophobic-gate
#5
Megumi Yamashita, Priscilla S-W Yeung, Christopher E Ing, Beth A McNally, Régis Pomès, Murali Prakriya
Store-operated Ca(2+) release-activated Ca(2+) (CRAC) channels constitute a major pathway for Ca(2+) influx and mediate many essential signalling functions in animal cells, yet how they open remains elusive. Here, we investigate the gating mechanism of the human CRAC channel Orai1 by its activator, stromal interacting molecule 1 (STIM1). We find that two rings of pore-lining residues, V102 and F99, work together to form a hydrophobic gate. Mutations of these residues to polar amino acids produce channels with leaky gates that conduct ions in the resting state...
February 21, 2017: Nature Communications
https://www.readbyqxmd.com/read/28220772/tumour-and-host-cell-pd-l1-is-required-to-mediate-suppression-of-anti-tumour-immunity-in-mice
#6
Janet Lau, Jeanne Cheung, Armando Navarro, Steve Lianoglou, Benjamin Haley, Klara Totpal, Laura Sanders, Hartmut Koeppen, Patrick Caplazi, Jacqueline McBride, Henry Chiu, Rebecca Hong, Jane Grogan, Vincent Javinal, Robert Yauch, Bryan Irving, Marcia Belvin, Ira Mellman, Jeong M Kim, Maike Schmidt
Expression of PD-L1, the ligand for T-cell inhibitory receptor PD-1, is one key immunosuppressive mechanism by which cancer avoids eradication by the immune system. Therapeutic use of blocking antibodies to PD-L1 or its receptor PD-1 has produced unparalleled, durable clinical responses, with highest likelihood of response seen in patients whose tumour or immune cells express PD-L1 before therapy. The significance of PD-L1 expression in each cell type has emerged as a central and controversial unknown in the clinical development of immunotherapeutics...
February 21, 2017: Nature Communications
https://www.readbyqxmd.com/read/28219889/rapid-and-rigorous-il-17a-production-by-a-distinct-subpopulation-of-effector-memory-t-lymphocytes-constitutes-a-novel-mechanism-of-toxic-shock-syndrome-immunopathology
#7
Peter A Szabo, Ankur Goswami, Delfina M Mazzuca, Kyoungok Kim, David B O'Gorman, David A Hess, Ian D Welch, Howard A Young, Bhagirath Singh, John K McCormick, S M Mansour Haeryfar
Toxic shock syndrome (TSS) is caused by staphylococcal and streptococcal superantigens (SAgs) that provoke a swift hyperinflammatory response typified by a cytokine storm. The precipitous decline in the host's clinical status and the lack of targeted therapies for TSS emphasize the need to identify key players of the storm's initial wave. Using a humanized mouse model of TSS and human cells, we herein demonstrate that SAgs elicit in vitro and in vivo IL-17A responses within hours. SAg-triggered human IL-17A production was characterized by remarkably high mRNA stability for this cytokine...
February 20, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28219806/structural-characterization-and-viscoelastic-constitutive-modeling-of-skin
#8
Vincent R Sherman, Yizhe Tang, Shiteng Zhao, Wen Yang, Marc A Meyers
: A fascinating material, skin has a tensile response which exhibits an extended toe region of minimal stress up to nominal strains that, in some species, exceed 1, followed by significant stiffening until a roughly linear region. The large toe region has been attributed to its unique structure, consisting of a network of curved collagen fibers. Investigation of the structure of rabbit skin reveals that it consists of layers of wavy fibers, each one with a characteristic orientation. Additionally, the existence of two preferred layer orientations is suggested based on the results of small angle x-ray scattering...
February 17, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28219606/mechanisms-of-g%C3%A3-nther-tulip-filter-tilting-during-transfemoral-placement
#9
Y Matsui, M Horikawa, K Ohta, Y Jahangiri Noudeh, J A Kaufman, K Farsad
OBJECTIVE: The purpose of this study was to characterize the mechanisms of Günther Tulip filter (GTF) tilting during transfemoral placement in an experimental model with further validation in a clinical series. MATERIALS AND METHODS: In an experimental study, 120 GTF placements in an inferior vena cava (IVC) model were performed using 6 configurations of pre-deployment filter position. The angle between the pre-deployment filter axis and IVC axis, and the proximity of the constrained filter legs to IVC wall prior to deployment were evaluated...
February 14, 2017: Diagnostic and Interventional Imaging
https://www.readbyqxmd.com/read/28219381/transformation-of-the-released-asbestos-carbon-fibers-and-carbon-nanotubes-from-composite-materials-and-the-changes-of-their-potential-health-impacts
#10
REVIEW
Jing Wang, Lukas Schlagenhauf, Ari Setyan
Composite materials with fibrous reinforcement often provide superior mechanical, thermal, electrical and optical properties than the matrix. Asbestos, carbon fibers and carbon nanotubes (CNTs) have been widely used in composites with profound impacts not only on technology and economy but also on human health and environment. A large number of studies have been dedicated to the release of fibrous particles from composites. Here we focus on the transformation of the fibrous fillers after their release, especially the change of the properties essential for the health impacts...
February 20, 2017: Journal of Nanobiotechnology
https://www.readbyqxmd.com/read/28218468/igf-1-receptor-expression-on-circulating-osteoblast-progenitor-cells-predicts-tissue-based-bone-formation-rate-and-response-to-teriparatide-in-premenopausal-women-with-idiopathic-osteoporosis
#11
Adi Cohen, Stavroula Kousteni, Brygida Bisikirska, Jayesh G Shah, J Sanil Manavalan, Robert R Recker, Joan Lappe, David W Dempster, Hua Zhou, Donald J McMahon, Mariana Bucovsky, Mafo Kamanda-Kosseh, Julie Stubby, Elizabeth Shane
We have previously reported that premenopausal women with idiopathic osteoporosis (IOP) have profound microarchitectural deficiencies and heterogeneous bone remodeling. Those with the lowest bone formation rate have higher baseline serum IGF-1 levels and less robust response to teriparatide. Because IGF-1 stimulates bone formation and is critical for teriparatide action on osteoblasts, these findings suggest a state of IGF-1 resistance in some IOP women. To further investigate the hypothesis that osteoblast and IGF-1 related mechanisms mediate differential responsiveness to teriparatide in IOP, we studied circulating osteoblast progenitor (COP) cells and their IGF-1 receptor (IGF-1R) expression...
February 20, 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/28217445/the-controversy-surrounding-penile-rehabilitation-after-radical-prostatectomy
#12
REVIEW
Jonathan Clavell-Hernández, Run Wang
Radical prostatectomy (RP) techniques have been refined in the last few decades. Despite nerve-sparing surgery, erectile dysfunction (ED) still seems to be affecting more than half of patients undergoing RP. Penile rehabilitation consists of understanding the mechanisms that affect erectile function (EF) and utilizing pharmacologic agents, devices or interventions to promote male sexual function before and after any insult to the penile erectile physiologic axis. There currently is a limited amount of clinical trials that assess treatments with the goal of recovering post-prostatectomy EF...
February 2017: Translational Andrology and Urology
https://www.readbyqxmd.com/read/28215679/causes-of-declining-fertility-in-dairy-cows-during-the-warm-season
#13
REVIEW
F De Rensis, F Lopez-Gatius, I García-Ispierto, G Morini, R J Scaramuzzi
In the Northern Hemisphere, from June to September and in the Southern Hemisphere from December to March, there are periods of reduced fertility (sub-fertility) in dairy cows that are described as summer infertility. Several factors contribute to sub-fertility during this time, such as ambient temperature, humidity and photoperiod. During the warm season there is a reduction in feed intake that may compromise the energy balance of the cow and/or induce an imbalance in the activity of the hypothalamo-hypophyseal-ovarian axis...
March 15, 2017: Theriogenology
https://www.readbyqxmd.com/read/28215162/gut-brain-axis-role-of-lipids-in-the-regulation-of-inflammation-pain-and-cns-diseases
#14
Roberto Russo, Claudia Cristiano, Carmen Avagliano, Carmen De Caro, Giovanna La Rana, Giuseppina Mattace Raso, Roberto Berni Canani, Rosaria Meli, Antonio Calignano
The human gut is a composite anaerobic environment with a large, diverse and dynamic enteric microbiota, represented by more than 100 trillion microorganisms, including at least 1000 distinct species. The discovery that a different microbial composition can influence behavior and cognition, and in turn the nervous system can indirectly influence enteric microbiota composition, has significantly contributed to establish the well-accepted concept of gut-brain axis. This hypothesis is supported by several evidence showing mutual mechanisms, which involve the vague nerve, the immune system, the hypothalamic-pituitary-adrenal (HPA) axis modulation and the bacteria-derived metabolites...
February 16, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28214555/identification-of-a-fatty-acid-binding-protein4-ucp2-axis-regulating-microglial-mediated-neuroinflammation
#15
Cayla M Duffy, Hongliang Xu, Joshua P Nixon, David A Bernlohr, Tammy A Butterick
Hypothalamic inflammation contributes to metabolic dysregulation and the onset of obesity. Dietary saturated fats activate microglia via a nuclear factor-kappa B (NFκB) mediated pathway to release pro-inflammatory cytokines resulting in dysfunction or death of surrounding neurons. Fatty acid binding proteins (FABPs) are lipid chaperones regulating metabolic and inflammatory pathways in response to fatty acids. Loss of FABP4 in peripheral macrophages via either molecular or pharmacologic mechanisms results in reduced obesity-induced inflammation via a UCP2-redox based mechanism...
February 15, 2017: Molecular and Cellular Neurosciences
https://www.readbyqxmd.com/read/28213553/automated-cell-tracking-identifies-mechanically-oriented-cell-divisions-during-drosophila-axis-elongation
#16
Michael F Z Wang, Miranda Hunter, Gang Wang, Christopher McFaul, Christopher M Yip, Rodrigo Fernandez-Gonzalez
Embryos extend their anterior-posterior (AP) axis in the conserved process of axis elongation. Drosophila axis elongation occurs in an epithelial monolayer, the germband, and is driven by cell intercalation, cell shape changes, and oriented cell divisions at the posterior germband. Anterior germband cells also divide during axis elongation. We developed image analysis and pattern recognition methods to track dividing cells from confocal microscopy movies in a generally-applicable approach. Mesectoderm cells, forming the ventral midline, divided parallel to the AP axis, while lateral cells displayed a uniform distribution of division orientations...
February 17, 2017: Development
https://www.readbyqxmd.com/read/28213303/diethylstilbestrol-flutamide-and-their-combination-impaired-the-spermatogenesis-of-male-adult-zebrafish-through-disrupting-hpg-axis-meiosis-and-apoptosis
#17
Pan Yin, Ying-Wen Li, Qi-Liang Chen, Zhi-Hao Liu
Both diethylstilbestrol (DES, an environmental estrogen) and flutamide (FLU, an anti-androgen) are found to impair spermatogenesis by disrupting hypothalamic-pituitary-gonadal (HPG) axis and altering androgen levels through different mechanisms/modes of action in fish with poorly understood underlying mechanisms. Furthermore, it is not known whether and how a combined exposure of DES and FLU has a stronger effect than the compounds alone. In this study, male zebrafish adults were exposed to DES, FLU and their combination (DES+FLU) for 30days, and their effects on histological structure and sperm count in testis, androgen level in plasma, as well as the mRNA levels of genes involved in HPG axis, meiotic regulation and apoptosis were analyzed...
February 10, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/28211554/psychiatric-illnesses-in-inflammatory-bowel-diseases-psychiatric-comorbidity-and-biological-underpinnings
#18
REVIEW
Jarosław Nowakowski, Adrian Andrzej Chrobak, Dominika Dudek
Inflammatory bowel disease is a group of chronic medical conditions comprising Crohn's disease and ulcerative colitis that involves increased frequency of mental disorders. The most common psychiatric disorders in inflammatory bowel disease are depression and anxiety, however, some epidemiologic and biological evidence suggest that other disorders like bipolar disorder occur more often. Biological mechanisms concerning both inflammatory bowel disease and depression or anxiety explain susceptibility to developing mental disorders in inflammatory bowel disease...
December 23, 2016: Psychiatria Polska
https://www.readbyqxmd.com/read/28210270/face-to-face-cognitive-behavioral-therapy-for-irritable-bowel-syndrome-the-effects-on-gastrointestinal-and-psychiatric-symptoms
#19
Hanna Edebol-Carlman, Brjánn Ljótsson, Steven J Linton, Katja Boersma, Martien Schrooten, Dirk Repsilber, Robert J Brummer
Irritable bowel syndrome (IBS) is a gastrointestinal disorder linked to disturbances in the gut-brain axis. Visceral hypersensitivity and pain are hallmarks of IBS and linked to the physiological and psychological burden and to the nonadaptive coping with stress. Cognitive-behavioral therapy (CBT) for IBS has proven effective in reducing gastrointestinal and psychiatric symptoms in IBS by means of coping with stress. The present pilot study evaluated for the first time whether CBT for IBS affected visceral sensitivity and pain...
2017: Gastroenterology Research and Practice
https://www.readbyqxmd.com/read/28210028/a-preliminary-study-of-the-measurement-of-overload-applied-to-the-foot-support-of-a-wheelchair-and-a-seated-postural-support-device
#20
Satoshi Shirogane, Takashi Handa, Yoshihiko Kozai, Yusuke Maeda
[Purpose] The mechanical strength of wheelchair and seating products is specified by standards to ensure user safety. However, some individual users are affected by severe spasticity resulting from cerebral palsy that occasionally breaks such devices. Until recently, reports of quantitative measurement of these mechanical overloads have been scarce, and the exact loads applied have been unknown. This study aimed to conduct a sampling survey prior to conducting a future full-scale study. [Subjects and Methods] Using two force plates, we measured the load on the foot support applied by three participants with cerebral palsy...
January 2017: Journal of Physical Therapy Science
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