keyword
MENU ▼
Read by QxMD icon Read
search

Prestin

keyword
https://www.readbyqxmd.com/read/29673641/a-novel-nanoparticle-delivery-system-for-targeted-therapy-of-noise-induced-hearing-loss
#1
Mohammad N Kayyali, Julian R A Wooltorton, Andrew J Ramsey, Mei Lin, Tiffany N Chao, Andrew Tsourkas, Bert W O'Malley, Daqing Li
Hearing loss is the most prevalent sensory disability worldwide and may be caused by age, drugs or exposure to excessive noise. We have previously developed a minimally-invasive nanohydrogel drug delivery system that successfully delivers nanoparticles into the inner ear. We have substantially extended this technique by functionalizing the nanoparticles and introducing a targeting peptide which recognizes prestin, a transmembrane electromotile protein uniquely expressed in outer hair cells (OHCs) of the inner ear...
April 16, 2018: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/29429181/-effect-of-melatonin-on-expression-of-prestin-protein-in-the-inner-ear-of-mice-following-radiotherapy
#2
T Chen, W Zhang, Y Liang, Q Li, C Yang, Y X Yuan, M L Ban
Objective: To investigate the effect of melatonin on the expression of prestin protein in the inner ear of mice following a single dose radiation therapy, so as to provide the basis for the mechanism study of radiation induced inner ear injury and its prevention. Methods: Sixty 4-week-old male mice were randomly divided into six groups, including the control group (A group), 50 mg/kg MLT group (B group), 5 mg/kg MLT group (C group), 50 mg/kg MLT + radiotherapy group (D group), 5 mg/kg MLT+ radiotherapy group (E group), and 16 Gy radiotherapy group (F group)...
February 7, 2018: Zhonghua Er Bi Yan Hou Tou Jing Wai Ke za Zhi, Chinese Journal of Otorhinolaryngology Head and Neck Surgery
https://www.readbyqxmd.com/read/29365377/-identification-and-analysis-of-the-proteins-interacted-with-prestin-in-cochlear-outer-hair-cells-of-guinea-pig
#3
X Luo, J Y Wang, F L Zhang, Y Xia
Objective: To explore the regulation and mechanism of Prestin protein by identifying the proteins interacted with Prestin in cochlear outer hair cell(OHC) and analyzing their biological function. Methods: Co-immunoprecipitation combined mass spectrometry technology was used to isolate and identify the proteins interacted with Prestin protein of OHC, bioinformatics was used to construct Prestin protein interaction network. The proteins interacted with Prestin in OHC of guinea pig were determined by matching primary interaction mass spectrometry with protein interaction network, and annotated their functions...
January 7, 2018: Zhonghua Er Bi Yan Hou Tou Jing Wai Ke za Zhi, Chinese Journal of Otorhinolaryngology Head and Neck Surgery
https://www.readbyqxmd.com/read/29276975/non-tip-auditory-nerve-responses-that-are-suppressed-by-low-frequency-bias-tones-originate-from-reticular-lamina-motion
#4
Hui Nam, John J Guinan
Recent cochlear mechanical measurements show that active processes increase the motion response of the reticular lamina (RL) at frequencies more than an octave below the local characteristic frequency (CF) for CFs above 5 kHz. A possible correlate is that in high-CF (>5 kHz) auditory-nerve (AN) fibers, responses to frequencies 1-3 octaves below CF ("tail" frequencies) can be inhibited by medial olivocochlear (MOC) efferents. These results indicate that active processes enhance the sensitivity of tail-frequency RL and AN responses...
December 14, 2017: Hearing Research
https://www.readbyqxmd.com/read/29160156/prestin-as-an-otologic-biomarker-of-cisplatin-ototoxicity-in-a-guinea-pig-model
#5
James Naples, Robert Cox, Gregory Bonaiuto, Kourosh Parham
Objective To evaluate (1) whether changes in serum prestin aid in early detection of cisplatin ototoxicity, (2) the role of diltiazem as an otoprotectant, and (3) whether prestin levels are sensitive to effects of diltiazem. Study Design Experimental animal study. Setting Translational research laboratory. Subjects Twenty female guinea pigs. Methods Two groups of 10 guinea pigs were used. The relationship between serum prestin levels and auditory brainstem response (ABR) thresholds was compared between the groups...
March 2018: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/29152945/dna-methylation-of-the-prestin-gene-and-outer-hair-cell-electromotileresponse-of-the-cochlea-in-salicylate-administration
#6
(no author information available yet)
Background/aim: Activity of the prestin gene may have a role in the pathogenesis of salicylate-induced ototoxicity. We investigated DNA methylation for prestin gene exon 1 in salicylate-injected guinea pigs.Materials and methods: Fifteen guinea pigs (30 ears) underwent audiological evaluation including 1000 Hz probe-tone tympanometry and a distortion product otoacoustic emission (DPOAE) test. The animals were randomly divided into three groups. Groups 2 (8 ears) and 3 (14 ears) were injected with intramuscular saline and sodium salicylate (200 mg/kg), respectively twice daily for 2 weeks...
November 13, 2017: Turkish Journal of Medical Sciences
https://www.readbyqxmd.com/read/29065096/changes-in-serum-prestin-concentration-after-exposure-to-cisplatin
#7
Benjamin Liba, James Naples, Elizabeth Bezyk, Charlene Campbell, Michael Mei, Kourosh Parham
HYPOTHESIS: There are temporal changes in the outer-hair-cell-specific protein, prestin, in the blood after administration of low-dose cisplatin. METHODS: Two rodent models of ototoxicity were used. After control and baseline data collection, mice (n = 30) and guinea pigs (n = 10), respectively, were treated with cisplatin at 8 mg/kg. Auditory brainstem responses were recorded on Days 1, 3, 7, and 14 after treatment. Five mice were sacrificed at each time point and serum samples were obtained...
December 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28928085/pdz-domain-containing-protein-1-pdzk1-a-modulator-of-membrane-proteins-is-regulated-by-the-nuclear-receptor-thr%C3%AE
#8
Celio Ferreira, Katharina Prestin, Janine Hussner, Uwe Zimmermann, Henriette E Meyer Zu Schwabedissen
Genome wide association studies revealed single nucleotide polymorphisms (SNP) located within the promoter of PDZ domain containing protein 1 (PDZK1) to be associated with serum uric acid levels. Since modulation of transporters and particularly of membrane proteins involved in uric acid handling by PDZK1 has previously been reported, the aim of this study was to analyze the impact of the polymorphisms rs1967017, rs1471633, and rs12129861 on promoter activity and thereby transcription of PDZK1. Cell-based reporter gene assays showed transactivation of the PDZK1-promoter by triiodothyronine mediated by thyroid hormone receptors (THR) α and β...
February 5, 2018: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/28915323/hair-cell-transduction-tuning-and-synaptic-transmission-in-the-mammalian-cochlea
#9
Robert Fettiplace
Sound pressure fluctuations striking the ear are conveyed to the cochlea, where they vibrate the basilar membrane on which sit hair cells, the mechanoreceptors of the inner ear. Recordings of hair cell electrical responses have shown that they transduce sound via submicrometer deflections of their hair bundles, which are arrays of interconnected stereocilia containing the mechanoelectrical transducer (MET) channels. MET channels are activated by tension in extracellular tip links bridging adjacent stereocilia, and they can respond within microseconds to nanometer displacements of the bundle, facilitated by multiple processes of Ca2+-dependent adaptation...
September 12, 2017: Comprehensive Physiology
https://www.readbyqxmd.com/read/28895742/human-prestin-a-candidate-pe1-protein-lacking-stringent-mass-spectrometric-evidence
#10
Abidali Mohamedali, Seong Beom Ahn, Varun K A Sreenivasan, Shoba Ranganathan, Mark S Baker
The evidence that any protein exists in the Human Proteome Project (HPP; protein evidence 1 or PE1) has revolved primarily (although not exclusively) around mass spectrometry (MS) (93% of PE1 proteins have MS evidence in the latest neXtProt release), with robust and stringent, well-curated metrics that have served the community well. This has led to a significant number of proteins still considered "missing" (i.e., PE2-4). Many PE2-4 proteins have MS evidence of unacceptable quality (small or not enough unitypic peptides and unacceptably high protein/peptide FDRs), transcriptomic, or antibody evidence...
December 1, 2017: Journal of Proteome Research
https://www.readbyqxmd.com/read/28873070/functional-assessment-of-genetic-variants-located-in-the-promoter-of-shp1-nr0b2
#11
Katharina Prestin, Maria Olbert, Janine Hussner, Henry Völzke, Henriette E Meyer Zu Schwabedissen
Small heterodimer partner 1 (SHP1, NR0B2) is a member of the superfamily of nuclear receptors (NRs). Even if this orphan receptor, unlike other NRs, lacks the DNA-binding domain, it is capable of regulating transcription by repressing the activity of other NRs by direct protein-protein interaction. Accordingly, SHP1 is part of negative feedback loops of the transcriptional regulation of genes involved in drug metabolism and various metabolic pathways including bile acid and glucose homeostasis. Although it is known that several interacting partners of SHP1 also modulate its expression, there is little information about genetic variability of this regulatory mechanism...
November 2017: Pharmacogenetics and Genomics
https://www.readbyqxmd.com/read/28817613/diflunisal-inhibits-prestin-by-chloride-dependent-mechanism
#12
Guillaume Duret, Fred A Pereira, Robert M Raphael
The motor protein prestin is a member of the SLC26 family of anion antiporters and is essential to the electromotility of cochlear outer hair cells and for hearing. The only direct inhibitor of electromotility and the associated charge transfer is salicylate, possibly through direct interaction with an anion-binding site on prestin. In a screen to identify other inhibitors of prestin activity, we explored the effect of the non-steroid anti-inflammatory drug diflunisal, which is a derivative of salicylate. We recorded prestin activity by whole-cell patch clamping HEK cells transiently expressing prestin and mouse outer hair cells...
2017: PloS One
https://www.readbyqxmd.com/read/28724612/regulation-of-pdz-domain-containing-1-pdzk1-expression-by-hepatocyte-nuclear-factor-1%C3%AE-hnf1%C3%AE-in-human-kidney
#13
Katharina Prestin, Janine Hussner, Celio Ferreira, Isabell Seibert, Vivien Breitung, Uwe Zimmermann, Henriette E Meyer Zu Schwabedissen
In the renal proximal tubule the secretion and reabsorption of glomerularly filtrated compounds is realized by a functional network of uptake and efflux transporters. The activity and localization of several transporters expressed at the apical tubular membrane are regulated by the membrane-associated protein PDZ domain-containing 1 (PDZK1). We aimed to characterize the transcriptional regulation of this modulator of renal transport. Coexpression analyses of PDZK1 and putative regulators were performed using human kidney samples...
October 1, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/28484373/evolution-and-development-of-the-inner-ear-efferent-system-transforming-a-motor-neuron-population-to-connect-to-the-most-unusual-motor-protein-via-ancient-nicotinic-receptors
#14
REVIEW
Bernd Fritzsch, Karen L Elliott
All craniate chordates have inner ears with hair cells that receive input from the brain by cholinergic centrifugal fibers, the so-called inner ear efferents (IEEs). Comparative data suggest that IEEs derive from facial branchial motor (FBM) neurons that project to the inner ear instead of facial muscles. Developmental data showed that IEEs develop adjacent to FBMs and segregation from IEEs might depend on few transcription factors uniquely associated with IEEs. Like other cholinergic terminals in the peripheral nervous system (PNS), efferent terminals signal on hair cells through nicotinic acetylcholine channels, likely composed out of alpha 9 and alpha 10 units (Chrna9, Chrna10)...
2017: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/28422190/current-carried-by-the-slc26-family-member-prestin-does-not-flow-through-the-transporter-pathway
#15
Jun-Ping Bai, Iman Moeini-Naghani, Sheng Zhong, Fang-Yong Li, Shumin Bian, Fred J Sigworth, Joseph Santos-Sacchi, Dhasakumar Navaratnam
Prestin in the lateral membrane of outer hair cells, is responsible for electromotility (EM) and a corresponding nonlinear capacitance (NLC). Prestin's voltage sensitivity is influenced by intracellular chloride. A regulator of intracellular chloride is a stretch-sensitive, non-selective conductance within the lateral membrane, GmetL . We determine that prestin itself possesses a stretch-sensitive, non-selective conductance that is largest in the presence of thiocyanate ions. This conductance is independent of the anion transporter mechanism...
April 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28216123/ablation-of-the-auditory-cortex-results-in-changes-in-the-expression-of-neurotransmission-related-mrnas-in-the-cochlea
#16
Verónica Lamas, José M Juiz, Miguel A Merchán
The auditory cortex (AC) dynamically regulates responses of the Organ of Corti to sound through descending connections to both the medial (MOC) and lateral (LOC) olivocochlear efferent systems. We have recently provided evidence that AC has a reinforcement role in the responses to sound of the auditory brainstem nuclei. In a molecular level, we have shown that descending inputs from AC are needed to regulate the expression of molecules involved in outer hair cell (OHC) electromotility control, such as prestin and the α10 nicotinic acetylcholine receptor (nAchR)...
March 2017: Hearing Research
https://www.readbyqxmd.com/read/28117133/pharmacogenetics-of-ecstasy-cyp1a2-cyp2c19-and-cyp2b6-polymorphisms-moderate-pharmacokinetics-of-mdma-in-healthy-subjects
#17
Patrick Vizeli, Yasmin Schmid, Katharina Prestin, Henriette E Meyer Zu Schwabedissen, Matthias E Liechti
In vitro studies showed that CYP2C19, CYP2B6, and CYP1A2 contribute to the metabolism of 3,4-methylenedioxymethamphetamine (MDMA, ecstasy) to 3,4-methylenedioxyamphetamine (MDA). However, the role of genetic polymorphisms in CYP2C19, CYP2B6, and CYP1A2 in the metabolism of MDMA in humans is unknown. The effects of genetic variants in these CYP enzymes on the pharmacokinetics and pharmacodynamics of MDMA were characterized in 139 healthy subjects (69 male, 70 female) in a pooled analysis of eight double-blind, placebo-controlled studies...
March 2017: European Neuropsychopharmacology: the Journal of the European College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/27744409/functional-effects-of-a-retained-ancestral-polymorphism-in-prestin
#18
LETTER
Yuan-Yuan Li, Zhen Liu, Fei-Yan Qi, Xin Zhou, Peng Shi
Molecular basis for mammalian echolocation has been receiving much concerns. Recent findings on the parallel evolution of prestin sequences among echolocating bats and toothed whales suggest that adaptations for high-frequency hearing have occurred during the evolution of echolocation. Here, we report that although the species tree for echolocating bats emitting echolocation calls with frequency modulated (FM) sweeps is paraphyletic, prestin exhibits similar functional changes between FM bats. Site-directed mutagenesis shows that the amino acid 308S in FM bats is responsible for the similar functional changes of prestin We strongly support that the occurrence of serine at position 308 is a case of hemiplasy, caused by incomplete lineage sorting of an ancestral polymorphism...
January 2017: Molecular Biology and Evolution
https://www.readbyqxmd.com/read/27684094/working-with-auditory-hei-oc1-cells
#19
Gilda M Kalinec, Channy Park, Pru Thein, Federico Kalinec
HEI-OC1 is one of the few mouse auditory cell lines available for research purposes. Originally proposed as an in vitro system for screening of ototoxic drugs, these cells have been used to investigate drug-activated apoptotic pathways, autophagy, senescence, mechanism of cell protection, inflammatory responses, cell differentiation, genetic and epigenetic effects of pharmacological drugs, effects of hypoxia, oxidative and endoplasmic reticulum stress, and expression of molecular channels and receptors. Among other several important markers of cochlear hair cells, HEI-OC1 cells endogenously express prestin, the paradigmatic motor protein of outer hair cells...
September 3, 2016: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/27636386/outer-hair-cell-molecular-protein-prestin-as-a-serum-biomarker-for-hearing-loss-proof-of-concept
#20
Kourosh Parham, Jonas Dyhrfjeld-Johnsen
HYPOTHESIS: At present there are no serum biomarkers available to monitor cochlear health in those at risk of hearing loss. Outer hair cells (OHCs) play an important role in cochlear function and are one of the cellular elements most vulnerable to damage, such as acoustic trauma. We hypothesized that an OHC-specific protein can serve as a biomarker for OHC damage in circulation. METHODS: After assessing auditory function, rats were exposed to intense octave band noise for 2 to 3 hours...
October 2016: Otology & Neurotology
keyword
keyword
3920
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"