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1.
Community Dent Health ; 37(2): 161-166, 2020 May 29.
Artículo en Inglés | MEDLINE | ID: mdl-32227704

RESUMEN

OBJECTIVE: To describe the shape of the relationship between area deprivation and dental attendance (DA) in children aged 5 years and under in England and the modifying effect of caries prevalence, ethnicity, family profile and dentist-to-population ratio. BASIC RESEARCH DESIGN: DA rates were calculated at lower-tier local authority level (LA, n=326) using NHS data for the year to March 2017. LA deprivation was determined by Index of Multiple Deprivation 2015. Caries prevalence was retrieved from the 2016/17 National Dental Epidemiology Programme; ethnicity and family profile from Census 2011 and dentist-to-population ratio from NHS statistics. Fractional polynomial (FP) models explored the shape of the relationship. Multivariable regression models were adjusted for covariates. The effect of moderators was estimated by adjusted marginal effects. CLINICAL SETTING: English Lower-tier LAs. MAIN OUTCOME MEASURE: Shape of the relationship between DA and deprivation and its moderators. RESULTS: Best-fitting second-order FP model (p=0.582) did not provide a better fit for the relationship than the linear model. Therefore, the linear model was selected for final analysis. Deprivation was associated with decreased DA rates (Coefficient=-0.39, 95%CI=-0.53,-0.24; p=⟨0.001); while White ethnicity (Coefficient=0.35, 95%CI=0.29, 0.41; p=⟨0.001), single parenthood (Coefficient = 2.21, 95%CI=0.91,3.51; p=0.001) and caries prevalence (Coefficient =0.34, 95%CI=0.25,0.44; p=⟨0.001) with increased rates. These moderated the relationship. CONCLUSIONS: We hypothesised that the shape of the relationship between deprivation and DA could be curvilinear with higher rates in the extreme ends of deprivation. However, the analysis showed a linear association, moderated by the effect of ethnicity, single parenthood and disease level.


Asunto(s)
Caries Dental , Niño , Preescolar , Inglaterra , Etnicidad , Familia , Humanos , Prevalencia
3.
J Biol Regul Homeost Agents ; 32(1): 83-88, 2018.
Artículo en Inglés | MEDLINE | ID: mdl-29504369

RESUMEN

Sensitivity to house dust mite allergens in the development of allergic rhinitis has a key role. In this study, the clinical and immunological effects of high dose Dermatophagoides farinae sublingual immunotherapy (SLIT) versus placebo were compared. Forty poly-sensitized patients, ages 6-33 years, with allergic rhinitis and positive allergic reaction to the mites were enrolled in the study. Twenty-one patients were placed in the SLIT group and 19 in the placebo group. Expression levels of IL-10, TGF-ß, FOXP3 and IL-17 were measured by using real-time PCR before and after the administration of sublingual immunotherapy. Clinical efficacy was estimated by the reduction rate of symptom/medication scores in the SLIT group compared with placebo treatment. After 6 months of SLIT, TGF-ß expression levels were increased compared to pre-treatment (P less than 0.05). SLIT with D. Farinae extract is an effective treatment for poly-sensitized patients with allergic rhinitis. TGF-ß mediated T-cell suppression may be an important mechanism in the first 6 months of SLIT.


Asunto(s)
Dermatophagoides farinae , Rinitis Alérgica Perenne/terapia , Inmunoterapia Sublingual , Adolescente , Adulto , Animales , Niño , Citocinas/inmunología , Método Doble Ciego , Femenino , Factores de Transcripción Forkhead/inmunología , Regulación de la Expresión Génica/inmunología , Humanos , Irán , Masculino , Rinitis Alérgica Perenne/inmunología
4.
EJNMMI Res ; 6(Suppl 1): 32, 2016 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-27090254

RESUMEN

TABLE OF CONTENTS: A1 68Ga-PSMA PET/CT in staging and restaging of Prostate Cancer Patients: comparative study with 18F-Choline PET/CTW Langsteger, A Rezaee, W Loidl, HS Geinitz, F Fitz, M Steinmair, G Broinger, L Pallwien-Prettner, M BeheshtiA2 F18 Choline PET - CT: an accurate diagnostic tool for the detection of parathyroid adenoma?L Imamovic, M Beheshti, G Rendl, D Hackl, O Tsybrovsky, M Steinmair, K Emmanuel, F Moinfar, C Pirich, W LangstegerA3 [18F]Fluoro-DOPA-PET/CT in the primary diagnosis of medullary thyroid carcinomaA Bytyqi, G Karanikas, M Mayerhöfer, O Koperek, B Niederle, M HartenbachA4 Variations of clinical PET/MR operations: An international survey on the clinical utilization of PET/MRIT Beyer, K Herrmann, J CzerninA5 Standard Dixon-based attenuation correction in combined PET/MRI: Reproducibility and the possibility of Lean body mass estimationI Rausch, P Rust, MD DiFranco, M Lassen, A Stadlbauer, ME Mayerhöfer, M Hartenbach, M Hacker, T BeyerA6 High resolution digital FDG PET/MRI imaging for assessment of ACL graft viabilityK Binzel, R Magnussen, W Wei, MU Knopp, DC Flanigan, C Kaeding, MV KnoppA7 Using pre-existing hematotoxicity as predictor for severe side effects and number of treatment cycles of Xofigo therapyA Leisser, M Nejabat, M Hartenbach, G Kramer, M Krainer, M Hacker, A HaugA8 QDOSE - comprehensive software solution for internal dose assessmentWencke Lehnert, Karl Schmidt, Sharok Kimiaei, Marcus Bronzel, Andreas KlugeA9 Clinical impact of Time-of-Flight on next-generation digital PET imaging of Yttrium-90 radioactivity following liver radioembolizationCL Wright, K Binzel, J Zhang, Evan Wuthrick, Piotr Maniawski, MV KnoppA10 Snakes in patients! Lessons learned from programming active contours for automated organ segmentationM Blaickner, E Rados, A Huber, M Dulovits, H Kulkarni, S Wiessalla, C Schuchardt, RP Baum, B Knäusl, D GeorgA11 Influence of a genetic polymorphism on brain uptake of the dual ABCB1/ABCG2 substrate [11C]tariquidarM Bauer, B Wulkersdorfer, W Wadsak, C Philippe, H Haslacher, M Zeitlinger, O LangerA12 Outcome prediction of temporal lobe epilepsy surgery from P-glycoprotein activity. Pooled analysis of (R)-[11C]-verapamil PET data from two European centresM Bauer, M Feldmann, R Karch, W Wadsak, M Zeitlinger, MJ Koepp, M-C Asselin, E Pataraia, O LangerA13 In-vitro and in-vivo characterization of [18F]FE@SNAP and derivatives for the visualization of the melanin concentrating hormone receptor 1M Zeilinger, C Philippe, M Dumanic, F Pichler, J Pilz, M Hacker, W Wadsak, M MitterhauserA14 Reducing time in quality control leads to higher specific radioactivity of short-lived radiotracersL Nics, B Steiner, M Hacker, M Mitterhauser, W WadsakA15 In vitro 11C-erlotinib binding experiments in cancer cell lines with epidermal growth factor receptor mutationsA Traxl, Thomas Wanek, Kushtrim Kryeziu, Severin Mairinger, Johann Stanek, Walter Berger, Claudia Kuntner, Oliver LangerA16 7-[11C]methyl-6-bromopurine, a PET tracer to measure brain Mrp1 function: radiosynthesis and first PET evaluation in miceS Mairinger, T Wanek, A Traxl, M Krohn, J Stanek, T Filip, M Sauberer, C Kuntner, J Pahnke, O LangerA17 18F labeled azidoglucose derivatives as "click" agents for pretargeted PET imagingD Svatunek, C Denk, M Wilkovitsch, T Wanek, T Filip, C Kuntner-Hannes, J Fröhlich, H MikulaA18 Bioorthogonal tools for PET imaging: development of radiolabeled 1,2,4,5-TetrazinesC Denk, D Svatunek, T Wanek, S Mairinger, J Stanek, T Filip, J Fröhlich, H Mikula, C Kuntner-HannesA19 Preclinical evaluation of [18F]FE@SUPPY- a new PET-tracer for oncologyT Balber, J Singer, J Fazekas, C Rami-Mark, N Berroterán-Infante, E Jensen-Jarolim, W Wadsak, M Hacker, H Viernstein, M MitterhauserA20 Investigation of Small [18F]-Fluoroalkylazides for Rapid Radiolabeling and In Vivo Click ChemistryC Denk, D Svatunek, B Sohr, H Mikula, J Fröhlich, T Wanek, C Kuntner-Hannes, T FilipA21 Microfluidic 68Ga-radiolabeling of PSMA-HBED-CC using a flow-through reactorS Pfaff, C Philippe, M Mitterhauser, M Hartenbach, M Hacker, W WadsakA22 Influence of 24-nor-ursodeoxycholic acid on hepatic disposition of [18F]ciprofloxacin measured with positron emission tomographyT Wanek, E Halilbasic, M Visentin, S Mairinger, B Stieger, C Kuntner, M Trauner, O LangerA23 Automated 18F-flumazenil production using chemically resistant disposable cassettesP Lam, M Aistleitner, R Eichinger, C ArtnerA24 Similarities and differences in the synthesis and quality control of 177Lu-DOTA-TATE, 177Lu -HA-DOTA-TATE and 177Lu-DOTA-PSMA (PSMA-617)H Eidherr, C Vraka, A Haug, M Mitterhauser, L Nics, M Hartenbach, M Hacker, W WadsakA25 68Ga- and 177Lu-labelling of PSMA-617H Kvaternik, R Müller, D Hausberger, C Zink, RM AignerA26 Radiolabelling of liposomes with 67Ga and biodistribution studies after administration by an aerosol inhalation systemU Cossío, M Asensio, A Montes, S Akhtar, Y te Welscher, R van Nostrum, V Gómez-Vallejo, J LlopA27 Fully automated quantification of DaTscan SPECT: Integration of age and gender differencesF VandeVyver, T Barclay, N Lippens, M TrochA28 Lesion-to-background ratio in co-registered 18F-FET PET/MR imaging - is it a valuable tool to differentiate between low grade and high grade brain tumor?L Hehenwarter, B Egger, J Holzmannhofer, M Rodrigues-Radischat, C PirichA29 [11C]-methionine PET in gliomas - a retrospective data analysis of 166 patientsN Pötsch, I Rausch, D Wilhelm, M Weber, J Furtner, G Karanikas, A Wöhrer, M Mitterhauser, M Hacker, T Traub-WeidingerA30 18F-Fluorocholine versus 18F-Fluorodeoxyglucose for PET/CT imaging in patients with relapsed or progressive multiple myeloma: a pilot studyT Cassou-Mounat, S Balogova, V Nataf, M Calzada, V Huchet, K Kerrou, J-Y Devaux, M Mohty, L Garderet, J-N TalbotA31 Prognostic benefit of additional SPECT/CT in sentinel lymph node mapping of breast cancer patientsS Stanzel, G Pregartner, T Schwarz, V Bjelic-Radisic, B Liegl-Atzwanger, R AignerA32 Evaluation of diagnostic value of TOF-18F-FDG PET/CT in patients with suspected pancreatic cancerS Stanzel, F Quehenberger, RM AignerA33 New quantification method for diagnosis of primary hyperpatahyroidism lesions and differential diagnosis vs thyropid nodular disease in dynamic scintigraphyA Koljevic Markovic, Milica Jankovic, V Miler Jerkovic, M Paskas, G Pupic, R Dzodic, D PopovicA34 A rare case of diffuse pancreatic involvement in patient with merkel cell carcinoma detected by 18F-FDGMC Fornito, D FamiliariA35 TSH-stimulated 18F-FDG PET/CT in the diagnosis of recurrent/metastatic radioiodine-negative differentiated thyroid carcinomas in patients with various thyroglobuline levelsP Koranda, H Polzerová, I Metelková, L Henzlová, R Formánek, E Buriánková, M KamínekA36 Breast Dose from lactation following I131 treatmentWH Thomson, C LewisA37 A new concept for performing SeHCAT studies with the gamma cameraWH Thomson, J O'Brien, G James, A NotghiA38 Whole body F-18-FDG-PET and tuberculosis: sensitivity compared to x-ray-CTH Huber, I Stelzmüller, R Wunn, M Mandl, F Fellner, B Lamprecht, M GabrielA39 Emerging role 18F-FDG PET-CT in the diagnosis and follow-up of the infection in heartware ventricular assist system (HVAD)MC Fornito, G LeonardiA40 Validation of Poisson resampling softwareWH Thomson, J O'Brien, G JamesA41 Protection of PET nuclear medicine personnel: problems in satisfying dose limit requirementsJ Hudzietzová, J Sabol, M Fülöp.

5.
Genet Mol Res ; 12(3): 3551-4, 2013 Sep 12.
Artículo en Inglés | MEDLINE | ID: mdl-24065688

RESUMEN

Multiple sclerosis (MS) is an immunological inflammatory disease of the central nervous system. The pathogenesis of MS is incompletely understood, but various studies have suggested that mitochondrial dysfunction is associated with the disease. Mitochondria are among the main cellular sources of reactive oxygen and nitrogen species, and they play a pivotal role in many neuro-pathological conditions. The mitochondrial nuclear subunit of complex I gene in mitochondria may play a role in MS, and understanding this role may provide rationale for novel approaches to treatment of the disease and the development of novel therapies. We designed a molecular study to demonstrate biochemical defects in complex I activity and found some novel nucleotide substitutions in mitochondrial DNA that might be involved in the pathogenesis of MS. The mitochondrial complex subunit I sequence was amplified and sequenced in MS patients. Although no reported pathogenic mutations were found in these patients, other studies have clearly indicated that the mitochondrial nuclear complex subunit I gene plays a significant role in MS pathogenesis.


Asunto(s)
Núcleo Celular/genética , Complejo I de Transporte de Electrón/deficiencia , Mitocondrias/genética , Enfermedades Mitocondriales/genética , Esclerosis Múltiple/genética , ADN Mitocondrial/genética , Complejo I de Transporte de Electrón/genética , Complejo I de Transporte de Electrón/metabolismo , Humanos , Enfermedades Mitocondriales/metabolismo , Esclerosis Múltiple/metabolismo , Esclerosis Múltiple/patología , Mutación , Especies de Nitrógeno Reactivo/metabolismo , Especies Reactivas de Oxígeno/metabolismo
6.
Aust Dent J ; 58(3): 315-20, 2013 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-23981212

RESUMEN

BACKGROUND: Toll-like receptors are a family of sensor proteins that induce the inflammatory diseases in context of microbial infection. The role of these proteins in periodontal disease and their interaction with smoking status are yet to be investigated. The aim of the present study was to evaluate the effect of smoking on gene expression of toll like receptor 2 (TLR-2) and toll-like receptor 4 (TLR-4) in patients with periodontitis. METHODS: RNAs were extracted from gingival biopsies of healthy sites (no bleeding on probing and pocket depth ≤3 mm) as well as diseased sites (with bleeding on probing and pocket depth ≥5 mm) of 20 smoker and 17 non-smoker subjects with chronic periodontitis. Gingival biopsies from eight periodontally healthy, never-smoker subjects served as control. Real-time PCR was carried out to evaluate the relative quantities of TLR-2 and TLR-4 mRNA concentrations. RESULTS: Regardless of smoking status, the relative expression levels of TLR-2 and TLR-4 were significantly greater (about 3 fold) at diseased sites compared to healthy sites of patients with periodontitis and healthy controls (p < 0.05). In sites with periodontitis, smoking caused an increase of about 6.5 fold in mRNA levels of TLR-4 in gingival tissue (p < 0.05). CONCLUSIONS: Although periodontitis might significantly increase TLR-2 and TLR-4 gene expression in gingival tissues, smoking habit in periodontitis subjects could selectively potentiate TLR-4 gene expression.


Asunto(s)
Encía/metabolismo , Periodontitis/metabolismo , Fumar/metabolismo , Receptor Toll-Like 2/metabolismo , Receptor Toll-Like 4/metabolismo , Adulto , Biomarcadores/metabolismo , Femenino , Encía/patología , Humanos , Masculino , Persona de Mediana Edad , Periodontitis/patología , ARN Mensajero/análisis , ARN Mensajero/metabolismo , Reacción en Cadena en Tiempo Real de la Polimerasa , Receptor Toll-Like 2/genética , Receptor Toll-Like 4/genética
7.
Iran J Ped Hematol Oncol ; 3(2): 59-63, 2013.
Artículo en Inglés | MEDLINE | ID: mdl-24575271

RESUMEN

BACKGROUND: The aim of this study was to evaluate leptin serum levels in patients with major beta thalassemia which was also associated with their ferritin serum levels. MATERIALS AND METHODS: This case-control study was performed on 90 children -6 months to 16 years old, in Zabol, Amir- al- Momenin Hospital. Patients were divided in two groups and were matched in age and sex. All Children were examined and those eligible children who had not known heart disease, iron deficiency anemia, kidney disease, diabetes, fever and systemic diseases were enrolled after taking the informed consent of their parents. After collecting the samples, leptin and ferritin levels of the serum were measured in two groups by ELISA method. Then, the data was analyzed by the related statistical tests and SPSS 20 software. RESULTS: The mean of the serum levels of leptin and ferritin showed a significant difference in the case and control groups (P-value<0.05). An inverse statistical correlation was found for the serum levels of leptin and ferritin among the studied groups (P-value<0.05). Levels of leptin in the case group showed a significant gender difference (P-value<0.05), while based on BMI and age, no significant difference was observed for the serum levels of leptin in the case group. CONCLUSION: Based on the results of this study, major thalassemia reduces serum levels of leptin regardless of age and body mass. The study also found an inverse statistical correlation between serum levels of leptin and ferritin among the studied people.

8.
Water Sci Technol ; 63(1): 129-35, 2011.
Artículo en Inglés | MEDLINE | ID: mdl-21245564

RESUMEN

Biosorption of Pb(II) by using digested sludge obtained from a municipal wastewater treatment plant in Tehran was examined. The aims of this investigation were biosorption of Pb(II) ions onto chemically treated digested sludge with hydrogen peroxide (H2O2) solution and determination of kinetic and isotherm of biosorption. Biosorption capacity of two types of sludge (treated and untreated) for biosorption of Pb(II) ions was investigated as function of initial Pb(II) concentration and pH using batch biosorption systems. The equilibrium biosorption capacity increased with increasing of initial metal ion concentrations and pH for both of digested sludge. The pseudo-second order kinetic model was found to be slightly suitable than the pseudo-first order kinetic model to correlate the experimental data for two types of digested sludge (R²>0.9). Regarding the applicability of the isotherm models, the freundlich model was found to be suitable than the other isotherm models. According to obtained q(max) from Langmuir isotherm, biosorption of Pb(II) by H2O2 treated digested sludge was found to perform better than untreated digested sludge. The maximum biosorption capacity was given 185.19 and 144.93 mgg⁻¹ for H2O2 treated and untreated digested sludge, respectively. Also, the constant of energy (B) between the Pb(II) ions and the adsorbent surface, calculated using BET isotherm model, obtained 5401 and 3401 for H2O2 treated and untreated digested sludge, respectively. These results indicate the usefulness of H2O2 treated digested sludge as a biosorbent for Pb(II) biosorption.


Asunto(s)
Plomo/metabolismo , Aguas del Alcantarillado , Contaminantes Químicos del Agua/metabolismo , Adsorción , Aerobiosis , Concentración de Iones de Hidrógeno , Cinética , Termodinámica
9.
Environ Technol ; 30(3): 233-9, 2009 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-19438055

RESUMEN

The photocatalytic degradation of Reactive Blue 19 (RB19) dye has been studied using TiO2 nanofibre as the photocatalyst in aqueous solution under UV irradiation. Titanium dioxide nanofibre was prepared using a templating method with tetraisopropylorthotitanate as a precursor. The experiments were carried out in the presence of the TiO2 nanofibre, and the effects of pH and electron acceptors on the degradation process were investigated. In order to observe the quality of the aqueous solution, chemical oxygen demand (COD) measurements were also carried out before and after the treatments. The photocatalytic decomposition of RB19 was most efficient in acidic solution. With the addition of hydrogen peroxide and potassium persulphate, as electron acceptors, into illuminated TiO2 nanofibre suspensions, a synergistic effect was observed leading to an enhancement of the decolorization. From experimental results, under the condition of 1 g TiO2 nanofibre l(-1), pH 3, and UVC light irradiation, decolorization would be complete in two hours. A significant decrease in the COD values was observed, which clearly indicates that the photocatalytic method offers good potential for the removal of RB19 from aqueous solution. The kinetic of photocatalytic removal of RB19 followed the Langmuir-Hinshelwood model. These results suggest that TiO2 nanofibres with UV photocatalysis can be envisaged as a method for the treatment of coloured wastewaters, in particular in textile industries.


Asunto(s)
Colorantes/química , Nanoestructuras/química , Procesos Fotoquímicos , Titanio/química , Agua/química , Adsorción , Color , Concentración de Iones de Hidrógeno , Cinética , Nanoestructuras/ultraestructura , Reproducibilidad de los Resultados , Factores de Tiempo , Rayos Ultravioleta , Eliminación de Residuos Líquidos/métodos
10.
Bull Environ Contam Toxicol ; 82(6): 732-7, 2009 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-19280089

RESUMEN

The aim of this study is the removal of endotoxin from aqueous solution using bone char (BC) as an adsorbent material. The BC was prepared from cattle animal bone by pyrolysis in a furnace at 850 degrees C. The morphology and physico-chemical characteristics of the adsorbent were investigated. Kinetic studies revealed that the adsorption of endotoxin is rapid. The adsorption mechanisms in the endotoxin-BC had a significant contribution from film diffusion. The maximum adsorption efficiency achieved is 98% at an adsorbent dose of 40 g L(-1) with an initial endotoxin concentration of 80 Eu mL(-1). The results show that the Langmuir isotherm adsorption equation model describe the experimental adsorption isotherm with good accuracy. A survey of the regeneration capabilities showed that the BC could be regenerated and rendered endotoxin free by heating at 350 degrees C for 30 min. The results suggest that BC could be used as effective adsorbent for endotoxin removal.


Asunto(s)
Huesos/química , Carbón Orgánico/química , Endotoxinas/análisis , Contaminantes Químicos del Agua/análisis , Adsorción , Animales , Bovinos , Soluciones , Agua/análisis
11.
J Otolaryngol ; 28(4): 223-8, 1999 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-10461260

RESUMEN

OBJECTIVE: This study was conducted to assess the safety and efficacy of individualized management of congenital subglottic hemangioma (CSH) at the Children's Memorial Hospital in Chicago; describe treatment modalities, including endoscopic excision with the carbon dioxide (CO2) laser, systemic corticosteroids, and intralesional corticosteroid injection with short-term intubation; and determine the success of these various strategies in avoiding tracheotomy. METHODS: During the 10-year period between January 1, 1988 and December 31, 1997, 28 infants were diagnosed with CSH. A retrospective review of medical records was undertaken to determine demographics, presenting symptoms, location of the lesion, therapeutic modality, and complications. All patients were contacted at the time of writing. RESULTS: Twenty-eight patients met the criteria for this study. Gender distribution was 1.8:1 female to male. Age at diagnosis ranged from 4 weeks to 8 months, with a mean of 78.8 days and a median of 60 days. The location of CSH was most often posterior and on the left. Associated hemangiomas were found in 14 (50%) cases. The most common symptoms were stridor and cough. Management included 1 to 13 operative direct laryngoscopies and bronchoscopies, endoscopic excision with the (CO2) laser, and the use of systemic and intralesional corticosteroids. No patient required tracheotomy. CONCLUSION: Morbidity and the need for tracheotomy in CSH patients can be minimized using a combination of therapeutic modalities. Each infant's treatment is individualized based on the severity of the patient's symptoms and the morphology of the lesion.


Asunto(s)
Neoplasias de Cabeza y Cuello/terapia , Hemangioma Capilar/terapia , Femenino , Glotis/patología , Glucocorticoides/administración & dosificación , Neoplasias de Cabeza y Cuello/congénito , Hemangioma Capilar/congénito , Humanos , Lactante , Recién Nacido , Intubación , Terapia por Láser , Masculino , Estudios Retrospectivos , Traqueotomía , Resultado del Tratamiento
12.
Laryngoscope ; 109(2 Pt 1): 329-33, 1999 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-10890788

RESUMEN

OBJECTIVES: Profile the expression of genes encoding GABAA receptor subunits in the vestibular end organs of a rat. MATERIALS AND METHODS: Using a combination of reverse transcription followed by polymerase chain reaction (PCR) with gene-specific primers, expression of mRNAs encoding 13 individual GABA(A) receptor subunits was examined. RESULTS: PCR amplification products representing subunit gene expression for alpha1-6, beta1-3, and gamma1-3, but not for delta, subunits were amplified, suggesting multiple molecular levels of regulation of vestibular GABA(A) receptor expression. Nucleotide sequencing confirmed the identity of rat vestibular end-organs subunit cDNAs. CONCLUSION: These results give the most direct evidence to date that GABAA receptors composed of the detected subunits are expressed in the mammalian vestibular system, giving new support to previous investigations implicating GABA as a vestibular neurotransmitter.


Asunto(s)
Expresión Génica/genética , Receptores de GABA-A/genética , Receptores de GABA-A/metabolismo , Vestíbulo del Laberinto/metabolismo , Animales , Secuencia de Bases , Cartilla de ADN/genética , ADN Complementario/genética , Masculino , Datos de Secuencia Molecular , Neuronas Aferentes/fisiología , ARN Mensajero/genética , Ratas , Ratas Sprague-Dawley , Receptores de GABA-B/genética , Receptores de GABA-B/metabolismo , Reacción en Cadena de la Polimerasa de Transcriptasa Inversa/métodos , Regulación hacia Arriba/genética
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