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https://www.readbyqxmd.com/read/29778289/diseases-and-targets-for-local-drug-delivery-to-the-inner-ear
#1
Lawrence R Lustig
No abstract text is available yet for this article.
May 11, 2018: Hearing Research
https://www.readbyqxmd.com/read/29777194/the-bony-labyrinth-of-toothed-whales-reflects-both-phylogeny-and-habitat-preferences
#2
Loïc Costeur, Camille Grohé, Gabriel Aguirre-Fernández, Eric Ekdale, Georg Schulz, Bert Müller, Bastien Mennecart
The inner ear of toothed whales (odontocetes) is known to have evolved particular shapes related to their abilities to echolocate and move under water. While the origin of these capacities is now more and more examined, thanks to new imaging techniques, little is still known about how informative inner ear shape could be to tackle phylogenetic issues or questions pertaining to the habitat preferences of extinct species. Here we show that the shape of the bony labyrinth of toothed whales provides key information both about phylogeny and habitat preferences (freshwater versus coastal and fully marine habitats)...
May 18, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29773841/ocular-counter-rolling-in-astronauts-after-short-and-long-duration-spaceflight
#3
Millard F Reschke, Scott J Wood, Gilles Clément
Ocular counter-rolling (OCR) is a reflex generated by the activation of the gravity sensors in the inner ear that stabilizes gaze and posture during head tilt. We compared the OCR measures that were obtained in 6 astronauts before, during, and after a spaceflight lasting 4-6 days with the OCR measures obtained from 6 astronauts before and after a spaceflight lasting 4-9 months. OCR in the short-duration fliers was measured using the afterimage method during head tilt at 15°, 30°, and 45°. OCR in the long-duration fliers was measured using video-oculography during whole body tilt at 25°...
May 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29770252/utility-of-magnetic-resonance-cisternography-with-intrathecal-gadolinium-in-detection-of-cerebrospinal-fluid-fistula-associated-with-mondini-dysplasia-in-a-patient-with-recurrent-meningitis-case-report-and-literature-review
#4
Enrique Caro-Osorio, Alba Espino-Ojeda, Lino Guevara-Maldonado, José C Herrea-Castro
Background: The intrathecal contrast-enhanced magnetic resonance cisternography (MRC) is a diagnostic method that has been proven effective in selected patients with various disorders of the cerebrospinal system, including the detection of cerebrospinal fluid (CSF) leaks. The Mondini dysplasia is a malformation of the inner ear characterized by an incomplete cochlear development. The cerebrospinal fistula associated with Mondini dysplasia usually occurs in the first 5-10 years. Case Description: The case of a 34-year-old woman with CSF rhinorrhea and recurrent meningitis associated with CSF fistula into the right inner ear, which was detected by MRC with intrathecal gadolinium, is presented...
2018: Surgical Neurology International
https://www.readbyqxmd.com/read/29769265/reciprocal-negative-regulation-between-lmx1a-and-lmo4-is-required-for-inner-ear-formation
#5
Yanhan Huang, Jennifer Hill, Andrew Yatteau, Loksum Wong, Tao Jiang, Jelena Petrovic, Lin Gan, Lijin Dong, Doris K Wu
LIM-domain containing transcription factors (LIM-TFs) are conserved factors important for embryogenesis. The specificity of these factors in transcriptional regulation is conferred by the complexes they form with other proteins such as LIM-domain-binding (Ldb) proteins and LIM-domain only (LMO) proteins. Unlike LIM-TF, these proteins do not bind DNA directly. LMO are negative regulators of LIM-TF and they function by competing with LIM-TFs for binding to Ldbs. Although the LIM-TF Lmx1a is expressed in the developing mouse hindbrain, which provides many of the extrinsic signals for inner ear formation, conditional knockout embryos of both sexes show that the inner ear source of Lmx1a is the major contributor of ear patterning...
May 16, 2018: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/29765956/transcriptomic-profiling-of-zebrafish-hair-cells-using-ribotag
#6
Maggie S Matern, Alisha Beirl, Yoko Ogawa, Yang Song, Nikhil Paladugu, Katie S Kindt, Ronna Hertzano
The zebrafish inner ear organs and lateral line neuromasts are comprised of a variety of cell types, including mechanosensitive hair cells. Zebrafish hair cells are evolutionarily homologous to mammalian hair cells, and have been particularly useful for studying normal hair cell development and function. However, the relative scarcity of hair cells within these complex organs, as well as the difficulty of fine dissection at early developmental time points, makes hair cell-specific gene expression profiling technically challenging...
2018: Frontiers in Cell and Developmental Biology
https://www.readbyqxmd.com/read/29762197/high-frequency-horizontal-semicircular-canal-function-in-certain-meni%C3%A3-re-s-disease
#7
Claudia Jerin, Rebecca Maxwell, Robert Gürkov
OBJECTIVES: To characterize video head impulse testing (vHIT) in definitive Menière's disease and to investigate the relationship between vHIT results and other audiovestibular function tests. DESIGN: Fifty-four patients with certain Menière's disease, that is, patients with clinically definite Menière's disease and endolymphatic hydrops visualized by locally enhanced inner ear MR imaging, were recruited for this study. All patients underwent vHIT. The vestibular-ocular reflex gain at 60 ms and refixation saccades were the outcome parameters measured...
May 14, 2018: Ear and Hearing
https://www.readbyqxmd.com/read/29760588/in-vitro-gentamicin-exposure-alters-caveolae-protein-profile-in-cochlear-spiral-ligament-pericytes
#8
Elisa Ghelfi, Yohann Grondin, Emil J Millet, Adam Bartos, Magda Bortoni, Clara Oliveira Gomes Dos Santos, Humberto J Trevino-Villarreal, Rosalinda Sepulveda, Rick Rogers
Background: The aminoglycoside antibiotic gentamicin is an ototoxic drug and has been used experimentally to investigate cochlear damage induced by noise.We have investigated the changes in the protein profile associated with caveolae in gentamicin treated and untreated spiral ligament (SL) pericytes, specialized cells in the blood labyrinth barrier of the inner ear microvasculature. Pericytes from various microvascular beds express caveolae, protein and cholesterol rich microdomains, which can undergo endocytosis and transcytosis to transport small molecules in and out the cells...
2018: Proteome Science
https://www.readbyqxmd.com/read/29755320/mechanically-gated-ion-channels-in-mammalian-hair-cells
#9
REVIEW
Xufeng Qiu, Ulrich Müller
Hair cells in the inner ear convert mechanical stimuli provided by sound waves and head movements into electrical signal. Several mechanically evoked ionic currents with different properties have been recorded in hair cells. The search for the proteins that form the underlying ion channels is still in progress. The mechanoelectrical transduction (MET) channel near the tips of stereociliary in hair cells, which is responsible for sensory transduction, has been studied most extensively. Several components of the sensory mechanotransduction machinery in stereocilia have been identified, including the multi-transmembrane proteins tetraspan membrane protein in hair cell stereocilia (TMHS)/LHFPL5, transmembrane inner ear (TMIE) and transmembrane channel-like proteins 1 and 2 (TMC1/2)...
2018: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/29755252/a-digital-endocranial-cast-of-the-early-paleocene-puercan-archaic-mammal-onychodectes-tisonensis-eutheria-taeniodonta
#10
James G Napoli, Thomas E Williamson, Sarah L Shelley, Stephen L Brusatte
Eutherian mammals-placentals and their closest extinct relatives-underwent a major radiation following the end-Cretaceous extinction, during which they evolved disparate anatomy and established new terrestrial ecosystems. Much about the timing, pace, and causes of this radiation remain unclear, in large part because we still know very little about the anatomy, phylogenetic relationships, and biology of the so-called 'archaic' eutherians that prospered during the ~10 million years after the extinction. We describe the first digital endocranial cast of a taeniodont, a bizarre group of eutherians that flourished in the early Paleogene, reconstructed from a computed tomography (CT) scan of a late Puercan (65...
2018: Journal of Mammalian Evolution
https://www.readbyqxmd.com/read/29754876/bone-morphogenetic-protein-4-antagonizes-hair-cell-regeneration-in-the-avian-auditory-epithelium
#11
Rebecca M Lewis, Jesse J Keller, Liangcai Wan, Jennifer S Stone
Permanent hearing loss is often a result of damage to cochlear hair cells, which mammals are unable to regenerate. Non-mammalian vertebrates such as birds replace damaged hair cells and restore hearing function, but mechanisms controlling regeneration are not understood. The secreted protein bone morphogenetic protein 4 (BMP4) regulates inner ear morphogenesis and hair cell development. To investigate mechanisms controlling hair cell regeneration in birds, we examined expression and function of BMP4 in the auditory epithelia (basilar papillae) of chickens of either sex after hair cell destruction by ototoxic antibiotics...
May 2, 2018: Hearing Research
https://www.readbyqxmd.com/read/29754270/heterozygous-missense-variants-of-lmx1a-lead-to-nonsyndromic-hearing-impairment-and-vestibular-dysfunction
#12
Mieke Wesdorp, Pia A M de Koning Gans, Margit Schraders, Jaap Oostrik, Martijn A Huynen, Hanka Venselaar, Andy J Beynon, Judith van Gaalen, Vitória Piai, Nicol Voermans, Michelle M van Rossum, Bas P Hartel, Stefan H Lelieveld, Laurens Wiel, Berit Verbist, Liselotte J Rotteveel, Marieke F van Dooren, Peter Lichtner, Henricus P M Kunst, Ilse Feenstra, Ronald J C Admiraal, Helger G Yntema, Lies H Hoefsloot, Ronald J E Pennings, Hannie Kremer
Unraveling the causes and pathomechanisms of progressive disorders is essential for the development of therapeutic strategies. Here, we identified heterozygous pathogenic missense variants of LMX1A in two families of Dutch origin with progressive nonsyndromic hearing impairment (HI), using whole exome sequencing. One variant, c.721G > C (p.Val241Leu), occurred de novo and is predicted to affect the homeodomain of LMX1A, which is essential for DNA binding. The second variant, c.290G > C (p.Cys97Ser), predicted to affect a zinc-binding residue of the second LIM domain that is involved in protein-protein interactions...
May 12, 2018: Human Genetics
https://www.readbyqxmd.com/read/29747060/acoustic-stimulation-on-the-round-window-for-active-middle-ear-implants
#13
Kiwoong Seong, Kyuyup Lee, Sunil Puria, Jin-Ho Cho
Many clinical reports have discussed the effectiveness of stimulating the ear's round window (RW) with a tool to mitigate conductive and mixed hearing loss. The RW is one of the two openings from the middle ear into the inner ear. Various methods have been proposed to construct a highly efficient, easily implanted, and reliable RW transducer. Devices, however, such as floating mass transducers, have difficulty establishing proper contact without some degree of bone incision around the RW. Additionally, vibration energy may not be fully transmitted to the cochlea, but instead will be spread through the soft tissue around the transducer...
May 2, 2018: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/29745880/the-role-of-auditory-evoked-potentials-and-otoacoustic-emissions-in-early-detection-of-hearing-abnormalities-in-beh%C3%A3-et-s-disease-patients-a-case-control-study
#14
Doa W Nada, Radwa M El Khouly, Souzan E Gadow, Shymaa A Hablas, Marwa A Aboelhawa, Doaa S Al Ashkar, Amal M El Barbary, Manal S Hussein, Elsayed Rageh, Alaa M Elsalawy, Mohamed H Abo-Zaid, Samah Elshweikh, Amani M El Gharib
OBJECTIVES: To determine the types and to assess the role of auditory evoked potentials and otoacoustic emissions in early detection of hearing abnormalities in Behçet's disease (BD) patients. Their correlations with disease activity were also considered. METHODS: Thirty patients with BD and thirty apparently sex- and age-matched healthy volunteers were included in this study. Auditory evaluation included pure tone audiometry (PTA), otoacoustic emissions (TEOAEs, DPOAE), auditory brainstem response test (ABR) and cortical auditory evoked potentials (tone and speech CAEPs) for all patients and control...
May 10, 2018: Clinical and Experimental Rheumatology
https://www.readbyqxmd.com/read/29741623/a-short-history-of-nearly-every-sense-the-evolutionary-history-of-vertebrate-sensory-cell-types
#15
Gerhard Schlosser
Evolving from filter feeding chordate ancestors, vertebrates adopted a more active life style. These ecological and behavioral changes went along with an elaboration of the vertebrate head including novel complex paired sense organs such as the eyes, inner ears and olfactory epithelia. However, the photoreceptors, mechanoreceptors and chemoreceptors used in these sense organs have a long evolutionary history and homologous cell types can be recognized in many other bilaterians or even cnidarians. After briefly introducing some of the major sensory cell types found in vertebrates, this review summarizes the phylogenetic distribution of sensory cell types in metazoans and presents a scenario for the evolutionary history of various sensory cell types involving several cell type diversification and fusion events...
May 8, 2018: Integrative and Comparative Biology
https://www.readbyqxmd.com/read/29740017/atoh1-rfx1-rfx3-transcription-factors-facilitate-the-differentiation-and-characterisation-of-inner-ear-hair-cell-like-cells-from-patient-specific-induced-pluripotent-stem-cells-harbouring-a8344g-mutation-of-mitochondrial-dna
#16
Yen-Chun Chen, Chia-Ling Tsai, Yau-Huei Wei, Yu-Ting Wu, Wei-Ting Hsu, Hung-Ching Lin, Yi-Chao Hsu
Degeneration or loss of inner ear hair cells (HCs) is irreversible and results in sensorineural hearing loss (SHL). Human-induced pluripotent stem cells (hiPSCs) have been employed in disease modelling and cell therapy. Here, we propose a transcription factor (TF)-driven approach using ATOH1 and regulatory factor of x-box (RFX) genes to generate HC-like cells from hiPSCs. Our results suggest that ATOH1/RFX1/RFX3 could significantly increase the differentiation capacity of iPSCs into MYO7AmCherry -positive cells, upregulate the mRNA expression levels of HC-related genes and promote the differentiation of HCs with more mature stereociliary bundles...
April 19, 2018: Cell Death & Disease
https://www.readbyqxmd.com/read/29739340/mutation-analysis-of-slc26a4-pendrin-gene-in-a-brazilian-sample-of-hearing-impaired-subjects
#17
Renata Watanabe Nonose, Karina Lezirovitz, Maria Teresa Balester de Mello Auricchio, Ana Carla Batissoco, Guilherme Lopes Yamamoto, Regina Célia Mingroni-Netto
BACKGROUND: Mutations in the SLC26A4 gene are associated with Pendred syndrome and autosomal recessive non-syndromic deafness (DFNB4). Both disorders have similar audiologic characteristics: bilateral hearing loss, often severe or profound, which may be associated with abnormalities of the inner ear, such as dilatation of the vestibular aqueduct or Mondini dysplasia. But, in Pendred syndrome (OMIM #274600), with autosomal recessive inheritance, besides congenital sensorineural deafness, goiter or thyroid dysfunctions are frequently present...
May 8, 2018: BMC Medical Genetics
https://www.readbyqxmd.com/read/29738887/transcriptome-analysis-reveals-enrichment-of-genes-associated-with-auditory-system-in-swimbladder-of-channel-catfish
#18
Yujia Yang, Xiaozhu Wang, Yang Liu, Qiang Fu, Changxu Tian, Chenglong Wu, Huitong Shi, Zihao Yuan, Suxu Tan, Shikai Liu, Dongya Gao, Rex Dunham, Zhanjiang Liu
In aquatic organisms, hearing is an important sense for acoustic communications and detection of sound-emitting predators and prey. Channel catfish is a dominant aquaculture species in the United States. As channel catfish can hear sounds of relatively high frequency, it serves as a good model for study auditory mechanisms. In catfishes, Weberian ossicles connect the swimbladder to the inner ear to transfer the forced vibrations and improve hearing ability. In this study, we examined the transcriptional profiles of channel catfish swimbladder and other four tissues (gill, liver, skin, and intestine)...
April 30, 2018: Comparative Biochemistry and Physiology. Part D, Genomics & Proteomics
https://www.readbyqxmd.com/read/29737812/is-high-sodium-intake-associated-with-hearing-impairment-the-association-between-spot-urine-sodium-concentration-and-hearing-threshold-in-korean-adolescents
#19
Hyun Seung Choi, Jung Hyun Chang, Jeong Hong Kim, Ju Wan Kang
BACKGROUND AND OBJECTIVES: High sodium intake is a well-known risk factor for diseases such as cardiovascular and renal disease. There may also be links between sodium intake and inner ear symptoms. However, the available data are limited, and clinicians remain suspicious about sodium intake and hearing threshold. We analyzed the relationship between spot urine sodium concentration and sensorineural hearing loss in Korean adolescents. METHODS AND STUDY DESIGN: A total of 534 subjects, aged 12-19 years old, were enrolled in this study...
2018: Asia Pacific Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/29735277/age-related-hearing-loss-innovations-in-hearing-augmentation
#20
REVIEW
Yona Vaisbuch, Peter Luke Santa Maria
Age-related hearing loss is a multifactorial condition that affects more than one-third of the aging population. Left untreated it can increase the risk of cognitive decline, dementia, social isolation, depression, and falls. Hearing augmentation devices exhibit improved digital sound processing and Smartphone connectivity. Stigma remains one of the prominent barriers and todays devices offer in the canal models, miniature sizes, and camouflage with the hair or skin color. Although rigorous scientific efforts are made in the research field of inner ear regeneration and some clinical early phase studies do exist, to date, the clinical availability is still some time away...
May 4, 2018: Otolaryngologic Clinics of North America
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