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https://www.readbyqxmd.com/read/28652642/optical-fiber-ultrasound-transmitter-with-electrospun-carbon-nanotube-polymer-composite
#1
Radhika K Poduval, Sacha Noimark, Richard J Colchester, Thomas J Macdonald, Ivan P Parkin, Adrien E Desjardins, Ioannis Papakonstantinou
All-optical ultrasound transducers are promising for imaging applications in minimally invasive surgery. In these devices, ultrasound is transmitted and received through laser modulation, and they can be readily miniaturized using optical fibers for light delivery. Here, we report optical ultrasound transmitters fabricated by electrospinning an absorbing polymer composite directly onto the end-face of optical fibers. The composite coating consisting of an aqueous dispersion of multi-walled carbon nanotubes (MWCNTs) in polyvinyl alcohol was directly electrospun onto the cleaved surface of a multimode optical fiber and subsequently dip-coated with polydimethylsiloxane (PDMS)...
May 29, 2017: Applied Physics Letters
https://www.readbyqxmd.com/read/28649857/effect-of-polysaccharides-extracted-from-sipunculus-nudus-snp-on-the-lifespan-and-immune-damage-repair-of-drosophila-melanogaster-exposed-to-cd-vi
#2
Jie Su, Linlin Jiang, Jingna Wu, Zhiyu Liu, Yuping Wu
The water-soluble polysaccharides extracted from Sipunculus nudus (SNP) was investigated on the lifespan and immune damage repair of Drosophila melanogaster exposed to Cd (VI). SNP increased superoxyde dismutase (SOD), nitrogen monoxide (NO), glutathione peroxidase (GSH-Px) and total anti-oxidation competence (T-AOC), with decreased malondialdehyde (MDA) on D. melanogaster demonstrated that SNP could attenuate oxidative damage of D. melanogaster Exposed to Cd (VI). Real-time PCR and western blot analysis showed that SNP enhanced the gene expression of Diptericin, Drosomycin, Defensin, PGRP-LC and the protein level of Toll, p-JNK and Relish, that suggested the promoting effect of SNP on the immune damage repair of D...
June 26, 2017: Natural Product Research
https://www.readbyqxmd.com/read/28642472/ambient-effects-on-electrical-characteristics-of-cvd-grown-monolayer-mos2-field-effect-transistors
#3
Jae-Hyuk Ahn, William M Parkin, Carl H Naylor, A T Charlie Johnson, Marija Drndić
Monolayer materials are sensitive to their environment because all of the atoms are at their surface. We investigate how exposure to the environment affects the electrical properties of CVD-grown monolayer MoS2 by monitoring electrical parameters of MoS2 field-effect transistors as their environment is changed from atmosphere to high vacuum. The mobility increases and contact resistance decreases simultaneously as either the pressure is reduced or the sample is annealed in vacuum. We see a previously unobserved, non-monotonic change in threshold voltage with decreasing pressure...
June 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28641777/role-of-parl-pink1-parkin-pathway-in-adipocyte-differentiation
#4
Ming-Yuh Shiau, Pin-Shen Lee, Ying-Jyun Huang, Ching-Ping Yang, Chiao-Wan Hsiao, Kai-Yun Chang, Huan-Wen Chen, Yih-Hsin Chang
OBJECTIVE: Adipogenesis determines the number of adipocytes which is increased when individuals become obese. Mitochondria undergo remarkable morphological and functional changes during adipogenesis. PTEN-induced kinase 1 (PINK1) is pivotal to maintain mitochondrial homeostasis in neural cells. The present study aimed at investigating effects of PINK1 on adipogenesis and energy metabolism. METHODS: Expression of presenilin associated rhomboid-like protein (PARL), PINK1 and Parkin, as well as the interaction among these proteins was temporally examined during adipogenesis...
July 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/28640757/novel-domain-wall-dynamics-in-synthetic-antiferromagnets
#5
See-Hun Yang, Stuart Parkin
In this article, we review fascinating new mechanisms on recently observed remarkable current driven domain wall motion in nanowires formed from perpendicularly magnetized synthetic antiferromagnets interfaced with heavy metallic layers, sources of spin-orbit torques. All the associated torques such as volumetric adiabatic and non-adiabatic spin-transfer-torque, spin-orbit torques, shape anisotropy field torques, Dzyaloshinkii-Moriya interaction torques and most importantly a new powerful torque, exchange coupling torque, will be discussed based on an analytical model that provides an intuitive description of domain wall dynamics in synthetic ferromagnets as well as synthetic antiferromagnets...
June 22, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/28638646/crystal-structure-of-4-4-bis-3-piperidin-1-yl-prop-1-yn-1-yl-1-1-biphen-yl
#6
Anqi Walbaum, E Kim Fifer, Sean Parkin, Peter A Crooks
The title compound, C28H32N2, (I), is one of a second generation of compounds designed and synthesized based on a very potent and selective α9α10 nicotinic acetyl-choline receptor antagonist ZZ161C {1,1'-[[1,1'-biphen-yl]-4,4'-diylbis(prop-2-yne-3,1-di-yl)]bis-(3,4-di-methyl-pyridin-1-ium) bromide}, which has shown analgesic effects in a chemotherapy-induced neuropathy animal model. Compound (I) was synthesized by the reaction of 4,4'-bis-(3-bromo-prop-1-yn-1-yl)-1,1'-biphenyl with piperidine at room temperature in aceto-nitrile...
June 1, 2017: Acta Crystallographica. Section E, Crystallographic Communications
https://www.readbyqxmd.com/read/28636471/laparoscopic-colectomy-in-a-district-hospital-the-single-surgeon-can-be-safe
#7
A A Aikoye, A Khushal, C Parkin, T Bates
BACKGROUND: Several outcome measures have been identified for colorectal surgery and published in the literature. This study sought to compare outcomes of high volume laparoscopic colectomy by a single surgeon in a district hospital with outcomes from tertiary referral centres. METHODS: This was a retrospective review of elective laparoscopic colectomy by a single laparoscopic general surgeon in a district hospital over a 51-month period using a prospectively maintained database...
February 7, 2017: Acta Chirurgica Belgica
https://www.readbyqxmd.com/read/28635602/preparedness-for-natural-disasters-in-colombia
#8
Joe Parkin Daniels
No abstract text is available yet for this article.
June 17, 2017: Lancet
https://www.readbyqxmd.com/read/28634388/mito-xenophagic-killing-of-bacteria-is-coordinated-by-a-metabolic-switch-in-dendritic-cells
#9
Nadine Radomski, Danny Kägebein, Elisabeth Liebler-Tenorio, Axel Karger, Elke Rufer, Birke Andrea Tews, Stefanie Nagel, Rebekka Einenkel, Anne Müller, Annica Rebbig, Michael R Knittler
Chlamydiae are bacterial pathogens that grow in vacuolar inclusions. Dendritic cells (DCs) disintegrate these compartments, thereby eliminating the microbes, through auto/xenophagy, which also promotes chlamydial antigen presentation via MHC I. Here, we show that TNF-α controls this pathway by driving cytosolic phospholipase (cPLA)2-mediated arachidonic acid (AA) production. AA then impairs mitochondrial function, which disturbs the development and integrity of these energy-dependent parasitic inclusions, while a simultaneous metabolic switch towards aerobic glycolysis promotes DC survival...
June 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28629580/folding-underlies-bidirectional-role-of-gpr37-pael-r-in-parkinson-disease
#10
REVIEW
Lina Leinartaité, Per Svenningsson
Since conformational flexibility, which is required for the function of a protein, comes at the expense of structural stability, many proteins, including G-protein-coupled receptors (GPCRs), are under constant risk of misfolding and aggregation. In this regard GPR37 (also named PAEL-R and ETBR-LP-1) takes a prominent role, particularly in relation to Parkinson disease (PD). GPR37 is a substrate for parkin and accumulates abnormally in autosomal recessive juvenile parkinsonism, contributing to endoplasmic reticulum stress and death of dopaminergic neurons...
June 16, 2017: Trends in Pharmacological Sciences
https://www.readbyqxmd.com/read/28627356/aquatic-therapy-for-children-with-duchenne-muscular-dystrophy-a-pilot-feasibility-randomised-controlled-trial-and-mixed-methods-process-evaluation
#11
Daniel Hind, James Parkin, Victoria Whitworth, Saleema Rex, Tracey Young, Lisa Hampson, Jennie Sheehan, Chin Maguire, Hannah Cantrill, Elaine Scott, Heather Epps, Marion Main, Michelle Geary, Heather McMurchie, Lindsey Pallant, Daniel Woods, Jennifer Freeman, Ellen Lee, Michelle Eagle, Tracey Willis, Francesco Muntoni, Peter Baxter
BACKGROUND: Duchenne muscular dystrophy (DMD) is a rare disease that causes the progressive loss of motor abilities such as walking. Standard treatment includes physiotherapy. No trial has evaluated whether or not adding aquatic therapy (AT) to land-based therapy (LBT) exercises helps to keep muscles strong and children independent. OBJECTIVES: To assess the feasibility of recruiting boys with DMD to a randomised trial evaluating AT (primary objective) and to collect data from them; to assess how, and how well, the intervention and trial procedures work...
May 2017: Health Technology Assessment: HTA
https://www.readbyqxmd.com/read/28625073/the-impact-of-structured-self-monitoring-of-blood-glucose-combined-with-intensive-education-on-hba1c-levels-hospitalizations-and-quality-of-life-parameters-in-insulin-treated-patients-with-diabetes-at-primary-care-in-serbia
#12
Nebojša M Lalić, Katarina Lalić, Aleksandra Jotić, Dejan Stanojević, Dragana Živojinović, Andrija Janićijević, Christopher Parkin
BACKGROUND: We assessed the effect of structured self-monitoring of blood glucose (SMBG), in combination with intensive education, on metabolic control, SMBG frequency, hospitalizations, cardiovascular risk factors, and quality-of-life parameters in patients with insulin-treated diabetes in primary health care settings in Serbia. METHODS: This 6-month, observational, noninterventional study, followed 346 insulin-treated diabetes patients (type 1 diabetes [T1D], n = 57; type 2 diabetes [T2D], n = 289) from 28 primary care centers...
December 1, 2016: Journal of Diabetes Science and Technology
https://www.readbyqxmd.com/read/28621812/tcdd-induces-ubch7-expression-and-synphilin-1-protein-degradation-in-the-mouse-ventral-midbrain
#13
Emmanuel González-Barbosa, Alejandro Mejía-García, Elizabeth Bautista, Frank J Gonzalez, José Segovia, Guillermo Elizondo
UbcH7 is an ubiquitin-conjugating enzyme that interacts with parkin, an E3 ligase. The UbcH7-parkin complex promotes the ubiquitination and degradation of several proteins via the 26S proteasome. Cellular accumulation of the UbcH7-parkin targets alpha-synuclein, and synphilin-1 has been associated with Parkinson disease. In mouse liver, 2,3,7,8-tetrachlorodibenzo-p-dioxin, an aryl hydrocarbon receptor ligand, induces UbcH7 expression. Therefore, the aim of the present study was to determine whether 2,3,7,8-tetrachlorodibenzo-p-dioxin induces Ubch7 mRNA and UbcH7 protein expression in the mouse brain, to characterize the molecular mechanism, and the effect on synphilin-1 half-life...
June 16, 2017: Journal of Biochemical and Molecular Toxicology
https://www.readbyqxmd.com/read/28620835/twenty-years-since-the-discovery-of-the-parkin-gene
#14
REVIEW
Nobutaka Hattori, Yoshikuni Mizuno
Nearly 20 years have passed since we identified the causative gene for a familial Parkinson's disease, parkin (now known as PARK2), in 1998. PARK2 is the most common gene responsible for young-onset Parkinson's disease. It codes for the protein Parkin RBR E3 ubiquitin-protein ligase (PARK2), which directly links to the ubiquitin-proteasome as a ubiquitin ligase. PARK2 is involved in mitophagy, which is a type of autophagy, in collaboration with PTEN-induced putative kinase 1 (PINK1). The PINK1 gene (previously known as PARK6) is also a causative gene for young-onset Parkinson's disease...
June 15, 2017: Journal of Neural Transmission
https://www.readbyqxmd.com/read/28618992/modulating-mitophagy-in-mitochondrial-disease
#15
Eszter Dombi, Heather Mortiboys, Joanna Poulton
Mitochondrial diseases may result from mutations in the maternally-inherited mitochondrial DNA (mtDNA) or from mutations in nuclear genes encoding mitochondrial proteins. Their bi-genomic nature makes mitochondrial diseases a very heterogeneous group of disorders that can present at any age and can affect any type of tissue. The autophagic-lysosomal degradation pathway plays an important role in clearing dysfunctional and redundant mitochondria through a specific quality control mechanism termed mitophagy. Mitochondria could be targeted for autophagic degradation for a variety of reasons including basal turnover for recycling, starvation induced degradation, and degradation due to damage...
June 16, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28615325/calcium-calmodulin-dependent-protein-kinase-regulates-the-pink1-parkin-and-dj-1-pathways-of-mitophagy-during-sepsis
#16
Xianghong Zhang, Du Yuan, Qian Sun, Li Xu, Emma Lee, Anthony J Lewis, Brian S Zuckerbraun, Matthew R Rosengart
During sepsis and shock states, mitochondrial dysfunction occurs. Consequently, adaptive mechanisms, such as fission, fusion, and mitophagy, are induced to eliminate damaged portions or entire dysfunctional mitochondria. The regulatory PINK1/Parkin and DJ-1 pathways are strongly induced by mitochondrial depolarization, although a direct link between loss of mitochondrial membrane potential (ΔΨ) and mitophagy has not been identified. Mitochondria also buffer Ca(2+), and their buffering capacity is dependent on ΔΨ...
June 14, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/28615189/bar-coding-neurodegeneration-identifying-sub-cellular-effects-of-human-neurodegenerative-disease-proteins-using-drosophila-leg-neurons
#17
Josefin Fernius, Annika Starkenberg, Stefan Thor
Genetic, biochemical and histological studies have identified a number of different proteins as key drivers of human neurodegenerative diseases. Whereas different proteins are typically involved in different disease, there is also considerable overlap. Addressing disease protein dysfunction in an in vivo neuronal context is often time-consuming and requires labor-intensive analysis of transgenic models. To facilitate the rapid, cellular analysis of disease protein dysfunction, we have developed a fruit fly (Drosophila melanogaster) adult leg neuron assay...
June 14, 2017: Disease Models & Mechanisms
https://www.readbyqxmd.com/read/28608965/hydrogen-sulphide-modulating-mitochondrial-morphology-to-promote-mitophagy-in-endothelial-cells-under-high-glucose-and-high-palmitate
#18
Ning Liu, Jichao Wu, Linxue Zhang, Zhaopeng Gao, Yu Sun, Miao Yu, Yajun Zhao, Shiyun Dong, Fanghao Lu, Weihua Zhang
Endothelial cell dysfunction is one of the main reasons for type II diabetes vascular complications. Hydrogen sulphide (H2 S) has antioxidative effect, but its regulation on mitochondrial dynamics and mitophagy in aortic endothelial cells under hyperglycaemia and hyperlipidaemia is unclear. Rat aortic endothelial cells (RAECs) were treated with 40 mM glucose and 200 μM palmitate to imitate endothelium under hyperglycaemia and hyperlipidaemia, and 100 μM NaHS was used as an exogenous H2 S donor. Firstly, we demonstrated that high glucose and palmitate decreased H2 S production and CSE expression in RAECs...
June 13, 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/28600493/adiponectin-modulates-oxidative-stress-induced-mitophagy-and-protects-c2c12-myoblasts-against-apoptosis
#19
Yinghui Ren, Yan Li, Jun Yan, Mingkun Ma, Dongmei Zhou, Zhenyi Xue, Zimu Zhang, Hongkun Liu, Huipeng Yang, Long Jia, Lijuan Zhang, Qi Zhang, Shuqin Mu, Rongxin Zhang, Yurong Da
Adiponectin (APN), also known as apM1, Acrp30, GBP28 and adipoQ, is a circulating hormone that is predominantly produced by adipose tissue. Many pharmacological studies have demonstrated that this protein possesses potent anti-diabetic, anti-atherogenic and anti-inflammatory properties. Although several studies have demonstrated the antioxidative activity of this protein, the regulatory mechanisms have not yet been defined in skeletal muscles. The aim of the present study was to examine the cytoprotective effects of APN against damage induced by oxidative stress in mouse-derived C2C12 myoblasts...
June 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28598236/destructive-cellular-paths-underlying-familial-and-sporadic-parkinson-disease-converge-on-mitophagy
#20
Xinnan Wang
The knowledge gap separating the molecular and cellular underpinnings of Parkinson disease (PD) and its pathology hinders treatment innovation. Adding to this difficulty is the lack of a reliable biomarker for PD. Our previous studies identify a link of 2 PD proteins, PINK1 and PRKN/Parkin to a mitochondrial motor/adaptor RHOT1/Miro-1, which mediates mitochondrial motility and mitophagy. Here we review our recent paper showing that a third PD protein, LRRK2, also targets RHOT1 and regulates mitophagy, and pathogenic LRRK2 disrupts this function...
June 9, 2017: Autophagy
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