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https://www.readbyqxmd.com/read/28428632/cyclophosphamide-induced-hcn1-channel-upregulation-in-interstitial-cajal-like-cells-leads-to-bladder-hyperactivity-in-mice
#1
Qian Liu, Zhou Long, Xingyou Dong, Teng Zhang, Jiang Zhao, Bishao Sun, Jingzhen Zhu, Jia Li, Qingqing Wang, Zhenxing Yang, Xiaoyan Hu, Longkun Li
Hyperpolarization-activated cyclic nucleotide-gated (HCN) channels are confirmed to be expressed in bladder interstitial Cajal-like cells (ICC-LCs), but little is known about their possible role in cystitis-associated bladder dysfunction. The present study aimed to determine the functional role of HCN channels in regulating bladder function under inflammatory conditions. Sixty female wild-type C57BL/6J mice and sixty female HCN1-knockout mice were randomly assigned to experimental and control groups, respectively...
April 21, 2017: Experimental & Molecular Medicine
https://www.readbyqxmd.com/read/28424360/intermittent-hypoxia-in-obstructive-sleep-apnoea-mediates-insulin-resistance-through-adipose-tissue-inflammation
#2
Aoife M Murphy, Amandine Thomas, Sophie J Crinion, Brian D Kent, Murtaza M Tambuwala, Aurelie Fabre, Jean-Louis Pepin, Helen M Roche, Claire Arnaud, Silke Ryan
Obstructive sleep apnoea (OSA) is increasingly associated with insulin resistance. The underlying pathophysiology remains unclear but intermittent hypoxia (IH)-mediated inflammation and subsequent dysfunction of the adipose tissue has been hypothesised to play a key role.We tested this hypothesis employing a comprehensive translational approach using a murine IH model of lean and diet-induced obese mice, an innovative IH system for cell cultures and a tightly controlled patient cohort.IH led to the development of insulin resistance in mice, corrected for the degree of obesity, and reduced insulin-mediated glucose uptake in 3T3-L1 adipocytes, associated with inhibition of the insulin-signalling pathway and downregulation of insulin-receptor substrate-1 mRNA...
April 2017: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
https://www.readbyqxmd.com/read/28424095/safety-and-effectiveness-of-oral-propranolol-for-infantile-hemangiomas-started-before-5%C3%A2-weeks-and-after-5%C3%A2-months-of-age-an-italian-multicenter-experience
#3
Maya El Hachem, Francesco Gesualdo, Andrea Diociaiuti, Irene Berti, Nadia Vercellino, Valeria Boccaletti, Iria Neri, Giulio Porcedda, Antonella Greco, Claudia Carnevale, Teresa Oranges, Mario Cutrone, Pietro Dalmonte
BACKGROUND: Despite not being licensed for the treatment of infantile hemangiomas (IH) in infants younger than 5 weeks or older than 5 months, propranolol is often used in these age groups to prevent or to treat potentially severe complications. The objective of the present study was to review the experience of 8 Italian pediatric and dermatologic centers regarding propranolol treatment for IH started before 5 weeks or after 5 months of age. METHODS: We retrospectively reviewed the records of patients followed up for IH, on propranolol treatment started before 5 weeks or after 5 months of age, and collected information on sociodemographic data, treatment indications, IH involution, IH relapse, and treatment side effects...
April 19, 2017: Italian Journal of Pediatrics
https://www.readbyqxmd.com/read/28423174/comparison-of-efficacy-and-safety-between-propranolol-and-steroid-for-infantile-hemangioma-a-randomized-clinical-trial
#4
Kyu Han Kim, Tae Hyun Choi, Yunhee Choi, Young Woon Park, Ki Yong Hong, Dong Young Kim, Yun Seon Choe, Hyunjung Lee, Jung-Eun Cheon, Jung-Bin Park, Kyung Duk Park, Hyoung Jin Kang, Hee Young Shin, Jae Hoon Jeong
Importance: There are limited data from randomized clinical trials comparing propranolol and steroid medication for treatment of infantile hemangioma (IH). Objective: To determine the efficacy and safety of propranolol compared with steroid as a first-line treatment for IH. Design, Setting, and Participants: This randomized clinical noninferiority trial tested the efficacy and safety of propranolol vs steroid treatment for IH at a single academic hospital...
April 19, 2017: JAMA Dermatology
https://www.readbyqxmd.com/read/28416809/perisomatic-changes-in-h-channels-regulate-depressive-behaviors-following-chronic-unpredictable-stress
#5
C S Kim, D H Brager, D Johnston
Chronic stress can be a precipitating factor in the onset of depression. Lentiviral-mediated knockdown of HCN1 protein expression and reduction of functional Ih produce antidepressant behavior. However, whether h-channels are altered in an animal model of depression is not known. We found that perisomatic HCN1 protein expression and Ih-sensitive physiological measurements were significantly increased in dorsal but not in ventral CA1 region/neurons following chronic unpredictable stress (CUS), a widely accepted model for major depressive disorder...
April 18, 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/28414444/accurate-relative-energies-and-binding-energies-of-large-ice-liquid-water-clusters-and-periodic-structures
#6
Lei Zhang, Wei Li, Tao Fang, Shuhua Li
Relative energies and binding energies are crucial quantities, which determine various molecular properties of ice and water. We developed a new effective method to compute those energies of bulk ice-liquid water systems. In this work, ten ice-liquid 144-mers and ten periodic ice-liquid (H2O)64 systems are taken out from the molecular dynamics simulations in the melting process of ice-Ih crystals. They are investigated at the levels of density functional theory (DFT), explicitly correlated second-order Møller-Plesset perturbation theory (MP2-F12) and coupled-cluster singles and doubles with noniterative triples corrections [CCSD(T)-F12b] in the framework of generalized energy-based fragmentation approach...
April 17, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28409977/hamiltonian-for-the-zeros-of-the-riemann-zeta-function
#7
Carl M Bender, Dorje C Brody, Markus P Müller
A Hamiltonian operator H[over ^] is constructed with the property that if the eigenfunctions obey a suitable boundary condition, then the associated eigenvalues correspond to the nontrivial zeros of the Riemann zeta function. The classical limit of H[over ^] is 2xp, which is consistent with the Berry-Keating conjecture. While H[over ^] is not Hermitian in the conventional sense, iH[over ^] is PT symmetric with a broken PT symmetry, thus allowing for the possibility that all eigenvalues of H[over ^] are real...
March 31, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28409646/intravitreal-bevacizumab-alters-type-iv-collagenases-and-exacerbates-arrested-alveologenesis-in-the-neonatal-rat-lungs
#8
Arwin M Valencia, Charles L Cai, Jeffrey Tan, Thomas J Duggan, Gloria B Valencia, Jacob V Aranda, Kay D Beharry
Purpose/Aim: Intravitreal bevacizumab (Avastin) is an irreversible vascular endothelial growth factor (VEGF) inhibitor used off-label to treat severe retinopathy of prematurity in extremely low gestational age neonates. VEGF and matrix metalloproteinases (MMPs) and the tissue inhibitors of metalloproteinases (TIMPs) participate in lung maturation. We tested the hypothesis that intravitreal bevacizumab enters the systemic circulation and has long-lasting effects on lung MMPs. MATERIALS AND METHODS: Neonatal rats were exposed to: (1) hyperoxia (50% O2); (2) intermittent hypoxia (IH) (50% O2 with brief episodes of 12% O2); or (3) room air (RA) from birth (P0) to P14...
April 14, 2017: Experimental Lung Research
https://www.readbyqxmd.com/read/28405033/post-caesarean-analgesia-what-is-new
#9
REVIEW
Sukhyanti Kerai, Kirti Nath Saxena, Bharti Taneja
Adequate post-operative analgesia after caesarean section (CS) is vital as it impacts the distinct surgical recovery requirements of the parturient. Although newer analgesic modalities and drugs for post-caesarean analgesia have been introduced over the recent years, review of the literature suggests suggests that we are far from achieving the goals of optimum post-operative analgesia. We conducted a systematic review of recent advances in modalities for post-caesarean analgesia. After systematic search and quality assessment of studies, we included a total of 51 randomised controlled trials that evaluated the role of opioids, transversus abdominis plane (TAP) block, wound infiltration/infusion, ketamine, gabapentin and ilioinguinal-iliohypogastric nerve block (II-IH NB) for post-caesarean analgesia...
March 2017: Indian Journal of Anaesthesia
https://www.readbyqxmd.com/read/28403143/a-novel-mechanism-of-cone-photoreceptor-adaptation
#10
Marcus H C Howlett, Robert G Smith, Maarten Kamermans
An animal's ability to survive depends on its sensory systems being able to adapt to a wide range of environmental conditions, by maximizing the information extracted and reducing the noise transmitted. The visual system does this by adapting to luminance and contrast. While luminance adaptation can begin at the retinal photoreceptors, contrast adaptation has been shown to start at later stages in the retina. Photoreceptors adapt to changes in luminance over multiple time scales ranging from tens of milliseconds to minutes, with the adaptive changes arising from processes within the phototransduction cascade...
April 2017: PLoS Biology
https://www.readbyqxmd.com/read/28402073/infantile-hemangiomas-an-updated-review-on-risk-factors-pathogenesis-and-treatment
#11
REVIEW
Chelsey J Forbess Smith, Sheila Fallon Friedlander, Monica Guma, Arthur Kavanaugh, Christina D Chambers
Infantile hemangiomas (IHs) are the most common vascular tumors in infants, appearing in early infancy and ultimately regressing with time. Clinical presentation may vary, with a minority of lesions causing impairment of vital function (e.g., respiratory or visual obstruction), permanent scarring, and/or disfigurement. The pathogenesis of IH is complex and poorly understood. Risk factors implicated in their development include preterm birth and placental anomalies. IH presents a myriad of clinical challenges, including correct diagnosis and whether or not to pursue treatment...
April 12, 2017: Birth Defects Res
https://www.readbyqxmd.com/read/28400141/the-use-of-an-algorithm-for-prophylactic-mesh-use-in-high-risk-patients-reduces-the-incidence-of-incisional-hernia-following-laparotomy-for-colorectal-cancer-resection
#12
Núria Argudo, M Pilar Iskra, Miguel Pera, Juan J Sancho, Luis Grande, Manuel López-Cano, José Antonio Pereira
OBJECTIVE: Incisional hernia (IH) after colorectal surgery is highly prevalent. The objective of this study is to assess the utility of an algorithm to decide on mesh augmentation after a midline laparotomy for colorectal resection to prevent IH in high-risk patients. METHODS: A prospective study was conducted including all patients undergoing a midline laparotomy for colorectal resection between January 2011 and June 2014, after the implementation of a decision algorithm for prophylactic mesh augmentation in selected high-risk patients...
April 8, 2017: Cirugía Española
https://www.readbyqxmd.com/read/28388601/early-post-natal-exposure-to-intermittent-hypoxia-in-rodents-is-pro-inflammatory-impairs-white-matter-integrity-and-alters-brain-metabolism
#13
Robert A Darnall, Xi Chen, Krishnamurthy V Nemani, Chrystelle M Sirieix, Barjor Gimi, Susan Knoblach, Betty L McEntire, Carl E Hunt
BACKGROUND: Preterm infants are frequently exposed to intermittent hypoxia (IH) associated with apnea and periodic breathing that may result in inflammation and brain injury that later manifests as cognitive and executive function deficits. We used a rodent model to determine whether early postnatal exposure to IH would result in inflammation and brain injury. METHODS: Rat pups were exposed to IH from P2-P12. Control animals were exposed to room air. Cytokines were analyzed in plasma and brain tissue at P13 and P18...
April 7, 2017: Pediatric Research
https://www.readbyqxmd.com/read/28387775/synchrotron-ftir-mapping-of-mineralization-in-a-microfluidic-device
#14
Shunbo Li, Johannes Ihli, William J Marchant, Muling Zeng, Li Chen, Katia Wehbe, Gianfelice Cinque, Oscar Cespedes, Nik Kapur, Fiona C Meldrum
Fourier transform infrared micro-spectroscopy provides an effective means of performing rapid, non-destructive, and label-free analysis of specimens according to their vibrational modes. However, as water absorbs very strongly in the infrared region, analysis of aqueous solutions in transmission mode can suffer from problems with signal saturation. We here describe the fabrication of a novel microfluidic device that overcomes this problem. Devices with channel depths of just 3 μm were constructed from calcium fluoride using photolithography and hot embossing bonding, where calcium fluoride was selected due to its transparency in the IR region...
April 7, 2017: Lab on a Chip
https://www.readbyqxmd.com/read/28382698/burden-of-infantile-hemangioma-on-family-an-international-observational-cross-sectional-study
#15
Christine Cazeau, Francine Blei, María Del Rosario Fátima Gonzáles Hermosa, Riccardo Cavalli, Olivia Boccara, Regina Fölster-Holst, Gilles Berdeaux, Alain Delarue, Jean-Jacques Voisard
BACKGROUND/OBJECTIVES: Infantile hemangioma (IH) is the most frequent benign tumor of infancy resulting from vascular proliferation. Data regarding the burden on families of children with IHs are limited. This study aimed to characterize IHs and provide a comprehensive evaluation of the burden of IHs on parents of children requiring systemic treatment in the United States and Europe. METHODS: This noninterventional cross-sectional study included infants with newly diagnosed IH requiring systemic treatment...
April 6, 2017: Pediatric Dermatology
https://www.readbyqxmd.com/read/28380374/mitochondrial-patch-clamp-of-beige-adipocytes-reveals-ucp1-positive-and-ucp1-negative-cells-both-exhibiting-futile-creatine-cycling
#16
Ambre M Bertholet, Lawrence Kazak, Edward T Chouchani, Marta G Bogaczyńska, Ishan Paranjpe, Gabrielle L Wainwright, Alexandre Bétourné, Shingo Kajimura, Bruce M Spiegelman, Yuriy Kirichok
Cold and other environmental factors induce "browning" of white fat depots-development of beige adipocytes with morphological and functional resemblance to brown fat. Similar to brown fat, beige adipocytes are assumed to express mitochondrial uncoupling protein 1 (UCP1) and are thermogenic due to the UCP1-mediated H(+) leak across the inner mitochondrial membrane. However, this assumption has never been tested directly. Herein we patch clamped the inner mitochondrial membrane of beige and brown fat to provide a direct comparison of their thermogenic H(+) leak (IH)...
April 4, 2017: Cell Metabolism
https://www.readbyqxmd.com/read/28380048/a-study-of-the-transferability-of-influenza-case-detection-systems-between-two-large-healthcare-systems
#17
Ye Ye, Michael M Wagner, Gregory F Cooper, Jeffrey P Ferraro, Howard Su, Per H Gesteland, Peter J Haug, Nicholas E Millett, John M Aronis, Andrew J Nowalk, Victor M Ruiz, Arturo López Pineda, Lingyun Shi, Rudy Van Bree, Thomas Ginter, Fuchiang Tsui
OBJECTIVES: This study evaluates the accuracy and transferability of Bayesian case detection systems (BCD) that use clinical notes from emergency department (ED) to detect influenza cases. METHODS: A BCD uses natural language processing (NLP) to infer the presence or absence of clinical findings from ED notes, which are fed into a Bayesain network classifier (BN) to infer patients' diagnoses. We developed BCDs at the University of Pittsburgh Medical Center (BCDUPMC) and Intermountain Healthcare in Utah (BCDIH)...
2017: PloS One
https://www.readbyqxmd.com/read/28378765/a-lignan-induces-lysosomal-dependent-degradation-of-foxm1-protein-to-suppress-%C3%AE-catenin-nuclear-translocation
#18
Guang-Zhi Dong, Ji Hye Jeong, Yu-Ih Lee, Yeong Eun Han, Jung Sook Shin, Yoon-Jung Kim, Raok Jeon, Young Hwa Kim, Tae Jun Park, Keun Il Kim, Jae-Ha Ryu
Colon cancer is one of the most common cancers. In this study, we isolated a lignan [(-)-(2R,3R)-1,4-O-diferuloylsecoisolariciresinol, DFS] from Alnus japonica (Betulaceae) and investigated its biological activity and mechanism of action on colon cancer. DFS reduced the viability of colon cancer cells and induced cell cycle arrest. DFS also suppressed β-catenin nuclear translocation and β-catenin target gene expression through a reduction in FoxM1 protein. To assess the mechanism of the action of DFS, we investigated the effect of DFS on endogenous and exogenous FoxM1 protein degradation in colon cancer cells...
April 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28376078/the-expression-of-renin-angiotensin-aldosterone-axis-components-in-infantile-hemangioma-tissue-and-the-impact-of-propranolol-treatment
#19
James R Dornhoffer, Ting Wei, Haihong Zhang, Emily Miller, Mario Cleves, Gresham T Richter
BACKGROUND: Propranolol's mechanism of action for controlling infantile hemangioma (IH) remains unclear. We hypothesize that this non-selective beta antagonist downregulates Renin-Angiotensin-Aldosterone (RAA) axis components, preventing angiogenic substrate induction of IH. METHODS: IH tissue and serum were collected from children with propranolol-treated or untreated IHs during surgery. Patients' normal skin and serum from demographically matched children were used as controls...
April 4, 2017: Pediatric Research
https://www.readbyqxmd.com/read/28373625/modification-of-multiple-ion-channel-functions-in-vivo-by-pharmacological-inhibition-observation-by-threshold-tracking-and-modeling
#20
Chimeglkham Banzrai, Hiroyuki Nodera, Ryo Okada, Saki Higashi, Yusuke Osaki, Ryuji Kaji
Maintenance of axonal excitability relies on complex balance by multiple ion currents, but its evaluation is limited by in vitro single channel neurophysiological study on overall behavior. We sought to evaluate behaviors of multiple ion currents by pharmacological blockade. The threshold tracking technique was used to measure multiple excitability indices on tail sensory nerve of normal male mice before and after administration of either BaCl2 or ivabradine. Mathematical modeling was used to identify the interval changes of the channel parameters...
2017: Journal of Medical Investigation: JMI
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