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Mudhol RS, Jahnavi. Hearing Evaluation in Patients with Chronic Renal Failure: A 1 Year Cross-Sectional Study in a Tertiary Care Centre. Indian J Otolaryngol Head Neck Surg 2019; 71:1633-1638. [PMID: 31750229 DOI: 10.1007/s12070-019-01701-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Accepted: 06/24/2019] [Indexed: 11/28/2022] Open
Abstract
(1) To study the prevalence of sensorineural hearing loss among chronic renal failure patients. (2) To study the correlation between degree of hearing loss and the duration of chronic renal failure. This cross sectional study was conducted in the department of Otorhinolaryngology and Head and Neck Surgery at KAHER's Jawaharlal Nehru Medical College and KLEs Dr. Prabhakar Kore Hospital and Medical Research Centre, Belagavi from January 2018 to December 2018. 60 ears (30 patients) with chronic renal failure were included in the study. All 60 ears were subjected to ENT examination, pure tone audiometry and measurement of glomerular filtration rate. Patients with type 2 diabetes mellitus, suppurative otitis media, and other known causes of sensorineural hearing loss were excluded. The prevalence of sensorineural hearing loss was calculated among the chronic renal failure patients. The correlation, if any, was studied by statistical analysis between SNHL and duration of chronic renal failure, as well as type and degree of hearing loss. Sensorineural hearing loss was seen in 51.67% of the 60 ears with 18.33% had mixed hearing loss (p < 0.0001). Robust correlation was seen between severity of SNHL and the duration of chronic renal failure. Positive correlation was seen between SNHL and age of the patient. High prevalence of SNHL was seen in the chronic renal failure patients. Long standing cases had tendency of worse hearing levels. Age of the patients also seemed to have a positive correlation with SNHL severity. While evaluating a chronic renal failure patient, auditory impairment should always be kept in mind.
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Affiliation(s)
- R S Mudhol
- Department of E.N.T and HNS, Jawaharlal Nehru Medical College, Belagavi, 590010 India
| | - Jahnavi
- Department of E.N.T and HNS, Jawaharlal Nehru Medical College, Belagavi, 590010 India
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Cuna V, Battaglino G, Capelli I, Sala E, Donati G, Cianciolo G, La Manna G. Hypoacusia and Chronic Renal Dysfunction: New Etiopathogenetic Prospective. Ther Apher Dial 2014; 19:111-8. [DOI: 10.1111/1744-9987.12232] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Vania Cuna
- Department of Experimental Diagnostic and Specialty Medicine (DIMES); Nephrology, Dialysis and Renal Transplant Unit; St Orsola Hospital; University of Bologna; Bologna Italy
| | - Giuseppe Battaglino
- Department of Experimental Diagnostic and Specialty Medicine (DIMES); Nephrology, Dialysis and Renal Transplant Unit; St Orsola Hospital; University of Bologna; Bologna Italy
| | - Irene Capelli
- Department of Experimental Diagnostic and Specialty Medicine (DIMES); Nephrology, Dialysis and Renal Transplant Unit; St Orsola Hospital; University of Bologna; Bologna Italy
| | - Elisa Sala
- Department of Experimental Diagnostic and Specialty Medicine (DIMES); Nephrology, Dialysis and Renal Transplant Unit; St Orsola Hospital; University of Bologna; Bologna Italy
| | - Gabriele Donati
- Department of Experimental Diagnostic and Specialty Medicine (DIMES); Nephrology, Dialysis and Renal Transplant Unit; St Orsola Hospital; University of Bologna; Bologna Italy
| | - Giuseppe Cianciolo
- Department of Experimental Diagnostic and Specialty Medicine (DIMES); Nephrology, Dialysis and Renal Transplant Unit; St Orsola Hospital; University of Bologna; Bologna Italy
| | - Gaetano La Manna
- Department of Experimental Diagnostic and Specialty Medicine (DIMES); Nephrology, Dialysis and Renal Transplant Unit; St Orsola Hospital; University of Bologna; Bologna Italy
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Salt AN, Plontke SK. Endolymphatic hydrops: pathophysiology and experimental models. Otolaryngol Clin North Am 2010; 43:971-83. [PMID: 20713237 DOI: 10.1016/j.otc.2010.05.007] [Citation(s) in RCA: 114] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
It is well established that endolymphatic hydrops plays a role in Ménière disease, even though the precise role is not fully understood and the presence of hydrops in the ear does not always result in symptoms of the disease. It nevertheless follows that a scientific understanding of how hydrops arises, how it affects the function of the ear, and how it can be manipulated or reversed could contribute to the development of effective treatments for the disease. Measurements in animal models in which endolymphatic hydrops has been induced have given numerous insights into the relationships between hydrops and other pathologic and electrophysiological changes, and how these changes influence the function of the ear. The prominent role of the endolymphatic sac in endolymph volume regulation, and the cascade of histopathological and electrophysiological changes that are associated with chronic endolymphatic hydrops, have now been established. An increasing number of models are now available that allow specific aspects of the interrelationships to be studied. The yclical nature of Ménière symptoms gives hope that treatments can be developed to maintain the ear in permanent state of remission, possibly by controlling endolymphatic hydrops, thereby avoiding the rogressive damage and secondary pathologic changes that may also contribute to the patient's symptoms.
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Affiliation(s)
- Alec N Salt
- Department of Otolaryngology, Washington University School of Medicine, Box 8115, 660 South Euclid Avenue, St Louis, MO 63110, USA.
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Ho Lee, Jun Kim, Sang Jeong Kim J. Effect of Vasopressin on Marginal Cells of Neonatal Rat Cochlea In Vitro. Acta Otolaryngol 2009. [DOI: 10.1080/00016480127371] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Teixeira M, Bernard C, Ferrary E, Butlen D. Purine and pyrimidine nucleotide-sensitive phospholipase A(2) in ampulla from frog semicircular canal. Am J Physiol Regul Integr Comp Physiol 2001; 280:R519-26. [PMID: 11208583 DOI: 10.1152/ajpregu.2001.280.2.r519] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
This study was attempted to characterize pharmacologically the P2Y receptors triggering phospholipase A(2) (PLA(2)) activation in ampulla from frog semicircular canal. A microassay was developed to screen the abilities of UTP analogs to stimulate [(3)H]arachidonic acid release by labeled ampullas. At 26 degrees C UTP induced a dose-dependent and saturable increase of PLA(2) activity (apparent activation constant 1.3 +/- 0.4 microM, Hill coefficient 0.9 +/- 0.2, maximal stimulating factor 2.0 +/- 0.1). The rank order of potency of agonists for PLA(2) activation was UTP > or = UDP > adenosine 5'-O-(2-thiodiphosphate) = adenosine 5'-O-(3-thiotriphosphate) > or = ATP = 2-methylthio-ATP > or = ADP = diadenosine tetraphosphate > or = alpha,beta-methylene-ATP = CTP > 2' and 3'-O-(4-benzoylbenzoyl)-ATP > or = AMP = UMP >> uridine and adenosine. UTP- and 2-methylthio-ATP-induced PLA(2) activations were inhibited by U-73122, GF-109203X, and methyl arachidonyl fluorophosphate. Basal activity was stimulated by phorbol ester and epinephrine and reduced by vasotocin, isoproterenol, prostaglandin E(2), cAMP, and forskolin. H-89 restored the cAMP- and forskolin-inhibited PLA(2) activities. Results indicate that P2Y receptor-mediated PLA(2) stimulation requires phopholipase C and protein kinase C activations and basal activity is inhibited by agonist-stimulated cAMP-dependent mechanisms.
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Affiliation(s)
- M Teixeira
- Institut National de la Santé et de la Recherche Médicale, Unité 426, Faculté de Médecine Xavier Bichat, 75870 Paris Cedex 18, France
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Butlen D, Bernard C, Ferrary E. Pharmacological characterization of ATP receptors in ampulla from frog semicircular canal. THE AMERICAN JOURNAL OF PHYSIOLOGY 1998; 275:R253-61. [PMID: 9688986 DOI: 10.1152/ajpregu.1998.275.1.r253] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Phosphoinositidase C activities sensitive to purine and pyrimidine nucleotides have been identified earlier in ampulla from Rana ridibunda semicircular canal. The aim of this study was to characterize the pharmacological properties of other P2 receptors borne by this structure. A microassay was developed to measure the binding of [35S]adenosine 5'-O-(2-thiodiphosphate) ([35S]ADPbetaS) to a few ampullas microdissected from frog semicircular canals. When determined at 4 degrees C in the absence of divalent cations, [35S]ADPbetaS binding was saturable with incubation time and reversible after elimination of free radioligand. The dissociation kinetics were biphasic and comprised a major component that was rapidly reversible and a minor component that dissociated slowly. [35S]ADPbetaS binding was competitively inhibited by unlabeled ADPbetaS with an apparent dissociation constant of 0.48 +/- 0.09 microM and a Hill coefficient of 0.70 +/- 0.06, and Scatchard analysis revealed a minor class of high-affinity binding sites (RT1 = 52 +/- 11 fmol [35S]ADPbetaS bound/ampulla and Kd1 = 0.15 +/- 0.04 microM) and a major class of low-affinity binding sites (RT2 = 436 +/- 79 fmol [35S]ADPbetaS bound/ampulla and Kd2 = 2.0 +/- 0.8 microM). The pattern of stereospecificity for recognition of unlabeled structural ATP analogs was ADPbetaS >/= alpha, beta-methyleneadenosine 5'-triphosphate = ADP = adenosine 5'-O-(3-thiotriphosphate) > ATP = diadenosine tetraphosphate = AMP > 2'- and 3'-O-(4-benzoylbenzoyl)-adenosine 5'-triphosphate >/= 2-methylthioadenosine 5'-triphosphate > 2-desoxythymidine 5'-triphosphate = guanosine 5'-triphosphate = inosine-5'-triphosphate = xanthosine 5'-triphosphate = cytosine 5'-triphosphate = uridine 5'-triphosphate = uridine-5'-diphosphate, whereas cAMP and adenosine were devoid of activity. For antagonists, suramin revealed competitive inhibitor potencies, whereas reactive blue 2 and DIDS acted as pure noncompetitive inhibitors. Results suggest that the population of labeled receptors is heterogeneous and contains a low number of P2Y-like receptors and a large number of P2X-like receptors whose molecular subtypes and functions in endolymph homeostasis remain to be defined.
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Affiliation(s)
- D Butlen
- Institut National de la Santé et de la Recherche Médicale, Unité 426, Faculté de Médecine Xavier Bichat, 75870 Paris Cedex 18, France
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Abstract
Morphologic similarities between strial marginal cells and vestibular dark cells have long been recognized and it has long been accepted that both of these cell types are involved in the secretion of K+ into endolymph. Functional similarities of these two epithelia however, were considered unlikely as long as strial marginal cells were assumed to generate the endocochlear potential which has no equivalent in the vestibular labyrinth. The recently introduced concept that strial marginal cells transport K+ but that the mechanism for the generation of the endocochlear potential is located in another cell type provided the basis to hypothesize that ion transport mechanisms and their regulation are similar in vestibular dark and strial marginal cells. The present review compiles evidence in support of this hypothesis.
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Affiliation(s)
- P Wangemann
- Cell Physiology Laboratory, Boys Town National Research Hospital, Omaha, NE 68131, USA
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Takeda T, Kakigi A, Saito H. Antidiuretic hormone (ADH) and endolymphatic hydrops. ACTA OTO-LARYNGOLOGICA. SUPPLEMENTUM 1995; 519:219-22. [PMID: 7610873 DOI: 10.3109/00016489509121909] [Citation(s) in RCA: 90] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Plasma antidiuretic hormone (p-ADH) concentrations were determined with a radioimmunoassay, using a reversed-phase C18 silica column, in 300 patients with vertigo, dizziness and/or deafness; 119 of them had a diagnosis of Menière's disease. The p-ADH level was significantly elevated in patients with Meniere's disease and others with endolymphatic hydrops, e.g. cochlear Menière's disease or delayed hydrops. By contrast, the p-ADH level was not so high in cases without the endolymphatic hydrops. The increase in the p-ADH level was closely linked to vertigo attacks, the glycerol test results and an enhanced negative summating potential (-SP) in electrocochleogram (ECochG). These results lead to the assumption that disorders of ADH-dependent hormonal control in the inner ear may constitute the possible mechanism underlying vertiginous attacks and deafness in patients with endolymphatic hydrops.
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Affiliation(s)
- T Takeda
- Department of Otorhinolaryngology, Kochi Medical School, Japan
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Martin F, Marianowski R, Tu TY, Herman P, Tran Ba Huy P. Modulation of cyclic AMP production by strial marginal cells from gerbil in culture. Hear Res 1994; 81:33-41. [PMID: 7737927 DOI: 10.1016/0378-5955(94)90150-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
To further investigate the role of marginal cells (MCs) in the secretion of endolymph and because of the limitations encountered in investigating these cells in vivo, we used primary cultures of MCs derived from explants of gerbil stria vascularis and investigated modulation of the adenylate cyclase-cyclic AMP system. After 10 days on type I collagen coated plastic dishes, a confluent monolayer of epithelial-like cells was obtained which exhibited the morphologic and immunohistochemical features of the native marginal cells. The cyclic AMP (cAMP) content was determined at 37 degrees C, after 5 min of incubation with various agents, in the presence of a specific inhibitor of type III cAMP-dependent phosphodiesterase, RO 20-1724. The adenylate cyclase-cAMP system was associated with beta 2-adrenergic receptors. The cAMP content was increased by isoproterenol (23-fold), a beta-agonist, but not by octopamine, an alpha-agonist, and the affinity for ICI 118.551, a specific beta 2-antagonist, was greater than for CGP 20712A, a specific beta 1-antagonist (Kd: 0.03 x 10(-6) M and 15 x 10(-6) M respectively). The cAMP content was maximally increased by prostaglandin E2 > beta 2-adrenergic agonist >> vasopressine type 2 receptor agonist (26-, 23-, and 3-fold the basal cAMP content, respectively). The present study demonstrates that cultured marginal cells retain some of their in vivo properties including a modulated enzymatic cAMP system. This culture model should allow further in-depth investigation of the function of marginal cells.
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Affiliation(s)
- F Martin
- Laboratoire d'Otologie Expérimentale, Faculté Lariboisière-St-Louis, Paris, France
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Julien N, Loiseau A, Sterkers O, Amiel C, Ferrary E. Antidiuretic hormone restores the endolymphatic longitudinal K+ gradient in the Brattleboro rat cochlea. Pflugers Arch 1994; 426:446-52. [PMID: 8015893 DOI: 10.1007/bf00388309] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
In the cochlea, endolymph is hyperosmotic to plasma and perilymph. To test the hypothesis that antidiuretic hormone is involved in the modulation of endolymph secretion, the electrochemical composition of cochlear fluids, endolymph and perilymph, was studied in three groups of anaesthetized rats: control Long Evans rats, homozygous Brattleboro rats that are genetically deprived of antidiuretic hormone, and Brattleboro rats that were treated with antidiuretic hormone (dDAVP, 0.5 microgram/100 g body weight/24 h during 8 days). Endolymph was sampled from the scala media at each turn of the cochlea and perilymph from the scala vestibuli. In Long Evans rats, the endocochlear potential, the endolymphatic K+ and Cl- concentrations decreased from base to apex of the cochlea as previously reported in guinea pigs and Sprague Dawley rats. In Brattleboro rats, the endocochlear potential and the Cl- concentration gradients were still present, whereas the K+ concentration gradient were still present, whereas the K+ concentration gradient was absent. This K+ gradient was restored by the administration of dDAVP, which increased the K+ concentration at the base of the cochlea. This work indicates that the K+ secretion in endolymph, and thus the osmolality, may be locally modulated by the antidiuretic hormone, probably via V2 receptors.
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Affiliation(s)
- N Julien
- INSERM U.251, Faculté Xavier Bichat, Paris, France
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Ferrary E, Bernard C, Oudar O, Sterkers O, Amiel C. Secretion of endolymph by the isolated frog semicircular canal. Acta Otolaryngol 1992; 112:294-8. [PMID: 1604995 DOI: 10.1080/00016489.1992.11665421] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Secretion of endolymph is localized in some structures of the inner ear, namely the stria vascularis in the cochlea and the dark cells in the vestibule and in the lower vertebrate inner ear. In isolated semicircular canal it is possible to study separately the endolymphatic composition in the ampulla, which contains the dark cells, and in its non-ampullar part, which is devoid of these cells. Further, in vitro preparation of the semicircular canal provides access to both faces of the epithelium so that different agents can be applied separately to the apical or to the basolateral membranes of the epithelium. In this structure, the following results were obtained: i) in vitro, the semicircular canal secreted a K-rich, positively polarized fluid; ii) this fluid was secreted only in the ampulla of the semicircular canal; iii) the secretion of endolymph was dependent on basolateral Na+, K(+)-ATPase, inhibited by ouabain, and basolateral Na-K-Cl co-transporter, inhibited by bumetanide; iv) approximately 60% of luminal Na absorption occurred across a luminal Na channel inhibited by amiloride; v) the permeability of the paracellular pathway of the semicircular canal epithelium was 7.10(-7) cm/s. These results indicate that endolymph secretion involves basolateral Na+, K(+)-ATPase and Na-K-Cl co-transporter. An Na channel has been shown at the apical membrane.
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Affiliation(s)
- E Ferrary
- INSERM U.251, Faculté Xavier Bichat, Université Paris 7, France
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Oudar O, Ferrary E, Feldmann G. Antidiuretic-hormone-induced morphological changes in the ampullary epithelium of the frog semicircular canal. Eur Arch Otorhinolaryngol 1991; 248:386-9. [PMID: 1747244 DOI: 10.1007/bf01463559] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Morphological changes induced by in vitro treatment with arginine-vasotocin, the frog antidiuretic hormone, were studied in the ampullary epithelium of the frog semicircular canal. Morphological changes appeared only in the apical side of the dark cells, while the basal part of these cells and the other cells lining the semicircular canal did not show any change. Changes consisted of the appearance of numerous small vesicles in the apical cytoplasm and the development of microvilli on the apical plasma membrane of the dark cells. These results suggest that arginine-vasotocin could play a role in the regulation of endolymph section.
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Affiliation(s)
- O Oudar
- INSERM U.251, Département de Physiologie, Faculté de Médecine Xavier Bichat, Université Paris, France
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