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Labyrinthitis

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https://www.readbyqxmd.com/read/28898451/comparative-ultrastructure-of-coxal-glands-in-unfed-larvae-of-leptotrombidium-orientale-schluger-1948-trombiculidae-and-hydryphantes-ruber-de-geer-1778-hydryphantidae
#1
Andrey B Shatrov
Coxal glands of unfed larvae Leptotrombidium orientale (Schluger, 1948) (Trombiculidae), a terrestrial mite parasitizing vertebrates, and Hydryphantes ruber (de Geer, 1778) (Hydryphantidae), a water mite parasitizing insects were studied using transmission electron microscopy. In both species, the coxal glands are represented by a paired tubular organ extending on the sides of the brain from the mouthparts to the frontal midgut wall and are formed of the cells arranged around the central lumen. As in other Parasitengona, the coxal glands are devoid of a proximal sacculus...
September 12, 2017: Journal of Morphology
https://www.readbyqxmd.com/read/28881663/bisphenol-a-exposure-promotes-htr-8-svneo-cell-migration-and-impairs-mouse-placentation-involving-upregulation-of-integrin-%C3%AE-1-and-mmp-9-and-stimulation-of-mapk-and-pi3k-signaling-pathways
#2
Xi Lan, Li-Juan Fu, Jun Zhang, Xue-Qing Liu, Hui-Jie Zhang, Xue Zhang, Ming-Fu Ma, Xue-Mei Chen, Jun-Lin He, Lian-Bing Li, Ying-Xiong Wang, Yu-Bin Ding
In this study, we investigated the effect of Bisphenol A (BPA), an endocrine-disrupting chemical, on the migration of human trophoblasts and mouse placentation by using the primary extravillous trophoblast (EVT) and its cell line HTR-8/SVneo, villous explant cultures, and pregnant mice. BPA increased EVT motility and the outgrowth of villous explants in a dose-dependent manner. BPA also increased the protein levels of integrin-β1 and matrix metalloproteinase (MMP)-9 in human EVTs. Low-dose BPA (≤50 mg) increased the protein levels of MMP-9 and MMP-2 as well as integrin-β1 and integrin-α5 in mouse placenta and decreased the proportion of the labyrinth and spongiotrophoblast layers...
August 1, 2017: Oncotarget
https://www.readbyqxmd.com/read/28877495/wave-mechanics-of-the-vestibular-semicircular-canals
#3
Marta M Iversen, Richard D Rabbitt
The semicircular canals are biomechanical sensors responsible for detecting and encoding angular motion of the head in 3D space. Canal afferent neurons provide essential inputs to neural circuits responsible for representation of self-position/orientation in space, and to compensatory circuits including the vestibulo-ocular and vestibulo-collic reflex arcs. In this work we derive, to our knowledge, a new 1D mathematical model quantifying canal biomechanics based on the morphology, dynamics of the inner ear fluids, and membranous labyrinth deformability...
September 5, 2017: Biophysical Journal
https://www.readbyqxmd.com/read/28868750/life-in-a-bubble-the-role-of-the-labyrinth-organ-in-determining-territory-mating-and-aggressive-behaviours-in-anabantoids
#4
REVIEW
M Tate, R E McGoran, C R White, S J Portugal
The anabantoids are a group of c. 137 species of air-breathing freshwater fishes found in Africa and southern Asia. All anabantoids have a pair of suprabranchial chambers that each house an air-breathing organ known as the labyrinth apparatus: a complex bony structure lined with thin, highly vascularised respiratory epithelium. The labyrinth apparatus allows anabantoids to extract oxygen from air and is a morpho-physiological innovation that has had a dramatic influence on the behaviour of these fishes. Air-breathing influences a wide range of anabantoid behaviours, including territorial displays, courtship and breeding and parental care and also equips these fishes to persist in hypoxic and polluted water...
September 2017: Journal of Fish Biology
https://www.readbyqxmd.com/read/28859161/natural-killer-cells-attenuate-cytomegalovirus-induced-hearing-loss-in-mice
#5
Ali A Almishaal, Pranav D Mathur, Elaine Hillas, Liting Chen, Anne Zhang, Jun Yang, Yong Wang, Wayne M Yokoyama, Matthew A Firpo, Albert H Park
Congenital cytomegalovirus (CMV) infection is the most common non-hereditary cause of sensorineural hearing loss (SNHL) yet the mechanisms of hearing loss remain obscure. Natural Killer (NK) cells play a critical role in regulating murine CMV infection via NK cell recognition of the Ly49H cell surface receptor of the viral-encoded m157 ligand expressed at the infected cell surface. This Ly49H NK receptor/m157 ligand interaction has been found to mediate host resistance to CMV in the spleen, and lung, but is much less effective in the liver, so it is not known if this interaction is important in the context of SNHL...
August 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28855042/insulinotropic-nucleobindin-2-nesfatin-1-is-dynamically-expressed-in-the-haemochorial-mouse-and-human-placenta
#6
Crystalyn B Legg-St Pierre, Martina Mackova, Ewa I Miskiewicz, Denise G Hemmings, Suraj Unniappan, Daniel J MacPhee
The placenta is the physiological bridge between mother and fetus and has life-sustaining functions during pregnancy, including metabolic regulation, fetal protection and hormone secretion. Nucleobindin-2 (NUCB2) is a calcium- and DNA-binding protein and precursor of nesfatin-1, a signalling peptide with multiple functions, including regulation of energy homeostasis and glucose transport. These are also key functions of the placenta, yet NUCB2/nesfatin-1 expression has never been comprehensively studied in this organ...
August 31, 2017: Reproduction, Fertility, and Development
https://www.readbyqxmd.com/read/28854868/comparative-developmental-toxicity-evaluation-of-di-n-hexyl-phthalate-and-dicyclohexyl-phthalate-in-rats
#7
Müfide Aydogan Ahbab, Celal Güven, Evrim Arzu Koçkaya, Nurhayat Barlas
To investigate the effects of di- n-hexyl phthalate (DHP) and dicyclohexyl phthalate (DCHP) on the development of fetus and placenta in utero, pregnant rats were exposed to DHP or DCHP at dosages of 0, 20, 100, and 500 mg/kg bw/day, by gavage, on gestational days 6-19. Anogenital distance (AGD) and AGD-body weight(1/3) ratio of female fetuses decreased in all treatment groups in a non-dose-response way. The ossification centers of bones and the intensity of Alizarin red stain of the fetuses decreased in all treatment groups...
January 1, 2017: Toxicology and Industrial Health
https://www.readbyqxmd.com/read/28842425/photoacoustic-imaging-for-in-vivo-quantification-of-placental-oxygenation-in-mice
#8
Liliya M Yamaleyeva, Yao Sun, Tiffaney Bledsoe, Asia Hoke, Susan B Gurley, K Bridget Brosnihan
Accurate analysis of placental and fetal oxygenation is critical during pregnancy. Photoacoustic imaging (PAI) combines laser technology with ultrasound in real time. We tested the sensitivity and accuracy of PAI for analysis of placental and fetal O2 saturation (sO2) in mice. The placental labyrinth (L) had a higher sO2 than the junctional zone plus decidua region (JZ+D) in C57Bl/6 mice. Changing maternal O2 from 100 to 20% in C57Bl/6 mice lowered sO2 in these regions. C57Bl/6 mice were treated with the NO synthase inhibitor L-N(G)-nitroarginine methyl ester (L-NAME) from gestational day (GD) 11 to GD18 to induce hypertension...
August 21, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/28840850/classification-and-current-management-of-inner-ear-malformations
#9
Levent Sennaroğlu, Münir Demir Bajin
Morphologically congenital sensorineural hearing loss can be investigated under two categories. Majority of the congenital hearing loss (80%) are membranous malformations. Here the pathology involves inner ear hair cells. There is no gross bony abnormality and therefore, in these cases, high resolution computerized tomography and MRI of the temporal bone reveal normal findings. Remaining 20% have various malformations involving the bony labyrinth and therefore, can be radiologically demonstrated by CT and MRI...
August 25, 2017: Balkan Medical Journal
https://www.readbyqxmd.com/read/28830019/metabolic-and-functional-paths-of-lactic-acid-bacteria-in-plant-foods-get-out-of-the-labyrinth
#10
REVIEW
Pasquale Filannino, Raffaella Di Cagno, Marco Gobbetti
Even though lactic acid bacteria are only a small part of the plant autochthonous microbiota, they represent the most important microbes having the capability to promote significant changes in the health-promoting properties of plant foods. Owing to the variety of plant chemical components and the possible pathways for bioconversion, plant fermentation is like a metabolic labyrinth undertaken by bacteria. The winding metabolic pathways involve several secondary plant metabolites (e.g. phenolics). The success of these paths is connected to the adaptive growth and survival of lactic acid bacteria...
August 19, 2017: Current Opinion in Biotechnology
https://www.readbyqxmd.com/read/28828230/synchrotron-scanning-reveals-the-palaeoneurology-of-the-head-butting-moschops-capensis-therapsida-dinocephalia
#11
Julien Benoit, Paul R Manger, Luke Norton, Vincent Fernandez, Bruce S Rubidge
Dinocephalian therapsids are renowned for their massive, pachyostotic and ornamented skulls adapted for head-to-head fighting during intraspecific combat. Synchrotron scanning of the tapinocephalid Moschops capensis reveals, for the first time, numerous anatomical adaptations of the central nervous system related to this combative behaviour. Many neural structures (such as the brain, inner ear and ophthalmic branch of the trigeminal nerve) were completely enclosed and protected by bones, which is unusual for non-mammaliaform therapsids...
2017: PeerJ
https://www.readbyqxmd.com/read/28826288/characteristic-mr-findings-suggesting-presumed-labyrinthine-hemorrhage
#12
Dong Sun Kim, Dong Woo Park, Tae Yoon Kim, Sang Joon Lee, Young-Jun Lee, Ji Young Lee, Seung Hwan Lee, Jae Ho Chung
OBJECTIVES: To evaluate the magnetic resonance imaging (MRI) findings of labyrinthine hemorrhage as a cause of sudden sensorineural hearing loss (SSNHL). METHODS: MRI scans of 59 patients with SSNHL were retrospectively analyzed and compared to clinical features and audiometry data. MR images included pre-enhanced T1-weighted, 3D FLAIR VISTA, post-enhanced T1-weighted and 4-h-delayed enhanced FLAIR volume isometric turbo spin-echo acquisition (VISTA), and 3D thin-section proton density-weighted images...
August 21, 2017: Acta Oto-laryngologica
https://www.readbyqxmd.com/read/28817653/perilymph-pharmacokinetics-of-marker-applied-through-a-cochlear-implant-in-guinea-pigs
#13
Alec Salt, Jared Hartsock, Ruth Gill, Daniel Smyth, Jonathon Kirk, Kristien Verhoeven
Patients undergoing cochlear implantation could benefit from a simultaneous application of drugs into the ear, helping preserve residual low-frequency hearing and afferent nerve fiber populations. One way to apply drugs is to incorporate a cannula into the implant, through which drug solution is driven. For such an approach, perilymph concentrations achieved and the distribution in the ear over time have not previously been documented. We used FITC-labeled dextran as a marker, delivering it into perilymph of guinea pigs at 10 or 100 nL/min though a cannula incorporated into a cochlear implant with the outlet in the mid basal turn...
2017: PloS One
https://www.readbyqxmd.com/read/28799140/management-of-labyrinthine-fistula-hearing-preservation-versus-prevention-of-residual-disease
#14
S Geerse, M J F de Wolf, F A Ebbens, E van Spronsen
The objective of the study was to evaluate postoperative hearing and disease control after cholesteatoma surgery for labyrinthine fistulas. In a retrospective cohort study, we evaluated a consecutive cohort comprising 44 patients (45 ears) with labyrinthine fistulas associated with chronic otitis media with cholesteatoma who underwent surgery between 2002 and 2015. We looked at patient characteristics, pre- and postoperative bone conduction thresholds (BCT), operative approach and findings, extent of disease and the occurrence of residual disease...
August 10, 2017: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/28792436/special-issue-cancer-metabolism
#15
EDITORIAL
Madhu Basetti
This special issue is designed to present the latest research findings and developments in the field of cancer metabolism. Cancer is a complex disease and a common term used for more than 100 diseases, whereas metabolism describes a labyrinth of complex biochemical pathways in the cell. It is essential to understand metabolism in the context of cancer for the early detection of disease biomarkers and to find proper targets for potential treatments. The articles presented in this issue cover metabolic aspects of brain tumours, breast tumours, paraganglioma, and the metabolic activity of tumour suppressor gene p53...
August 9, 2017: Metabolites
https://www.readbyqxmd.com/read/28767023/-cerebral-vasculitis-a-diagnostic-labyrinth
#16
R C van Houwelingen, C J M Frijns, S T Toering, P J van Laar, J F Meilof
- A diagnosis of cerebral vasculitis is frequently considered in patients with new or progressive neurological symptoms for which there is no other explanation.- A clinician considering a diagnosis of cerebral vasculitis should be well aware of alternative diagnoses, since these are generally more common.- Several consecutive examinations are required for diagnosing cerebral vasculitis, because there is no diagnostic procedure that is highly sensitive as well as highly specific.- The added value of the different procedures may depend on the type of blood vessels involved...
2017: Nederlands Tijdschrift Voor Geneeskunde
https://www.readbyqxmd.com/read/28740212/phonon-conduction-in-silicon-nanobeam-labyrinths
#17
Woosung Park, Giuseppe Romano, Ethan C Ahn, Takashi Kodama, Joonsuk Park, Michael T Barako, Joon Sohn, Soo Jin Kim, Jungwan Cho, Amy M Marconnet, Mehdi Asheghi, Alexie M Kolpak, Kenneth E Goodson
Here we study single-crystalline silicon nanobeams having 470 nm width and 80 nm thickness cross section, where we produce tortuous thermal paths (i.e. labyrinths) by introducing slits to control the impact of the unobstructed "line-of-sight" (LOS) between the heat source and heat sink. The labyrinths range from straight nanobeams with a complete LOS along the entire length to nanobeams in which the LOS ranges from partially to entirely blocked by introducing slits, s = 95, 195, 245, 295 and 395 nm...
July 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28736767/activation-of-mosquito-complement-antiplasmodial-response-requires-cellular-immunity
#18
Julio César Castillo, Ana Beatriz Barletta Ferreira, Nathanie Trisnadi, Carolina Barillas-Mury
The mosquito complement-like system is a major defense mechanism that limits Plasmodium infection. Ookinete midgut invasion results in irreversible damage to invaded cells and triggers epithelial nitration and complement activation. Several lines of evidence suggest that hemocytes participate in early antiplasmodial responses that target ookinetes, but their role remains unclear. The fate of hemocytes in response to Plasmodium infection was investigated by labeling this cell population in vivo. We found that midgut nitration triggers the local release of hemocyte-derived microvesicles (HdMv) into the basal labyrinth of the midgut...
January 2017: Science Immunology
https://www.readbyqxmd.com/read/28727763/loss-of-receptor-activity-modifying-protein-2-in-mice-causes-placental-dysfunction-and-alters-pth1r-regulation
#19
Mahita Kadmiel, Brooke C Matson, Scott T Espenschied, Patricia M Lenhart, Kathleen M Caron
Receptor activity-modifying protein 2 (Ramp2) is a single-pass transmembrane protein that heterodimerizes with several family B G-protein coupled receptors to alter their function. Ramp2 has been primarily characterized in association with calcitonin receptor-like receptor (Calcrl, CLR), forming the canonical receptor complex for the endocrine peptide adrenomedullin (Adm, AM). However, we previously demonstrated that Ramp2+/- female mice display a constellation of endocrine-related phenotypes that are distinct from those of Adm+/- and Calcrl+/- mice, implying that RAMP2 has physiological functions beyond its canonical complex...
2017: PloS One
https://www.readbyqxmd.com/read/28724843/the-complex-structure-of-the-mouse-placental-labyrinth-revealed-by-double-immunofluorescence-labeling-of-slc2a1-and-gjb2
#20
Chaw Kyi-Tha-Thu, Toshihiro Takizawa
No abstract text is available yet for this article.
2017: Journal of Nippon Medical School, Nippon Ika Daigaku Zasshi
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