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Avillion MP, Lopez IA, Matsui H, Ishiyama G, Ishiyama A. Differential Expression of Na/K-ATPase in the Human Saccule of Patients With and Without Otologic Disease. Otol Neurotol 2023; 44:e256-e261. [PMID: 36791368 PMCID: PMC10038903 DOI: 10.1097/mao.0000000000003834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Abstract
HYPOTHESIS Na + , K + -ATPase (Na/K-ATPase) α1 subunit expression in the saccule of patients diagnosed with otologic disease is different compared with normal controls. BACKGROUND We have recently characterized changes in the expression of Na/K-ATPase α1 subunit in the normal and pathological cochlea; however, no studies have determined the distribution Na/K-ATPase α1 subunit in the human saccule. The present study uses archival temporal bones to study the expression Na/K-ATPase α1 subunit in the human saccule. METHODS Archival celloidin formalin fixed 20-micron thick sections of the vestibule from patients diagnosed with Menière's disease (n = 5), otosclerosis (n = 5), sensorineural hearing loss, and normal hearing and balance (n = 5) were analyzed. Sections containing the saccular macula were immunoreacted with mouse monoclonal antibodies against Na/K-ATPase α1 subunit. Micrographs were acquired using a high-resolution digital camera coupled to a light inverted microscope. RESULTS In the normal human saccule vestibular sensory epithelium, Na/K-ATPase α1 immunoreactivity (IR) was present in nerve fibers and calyces that surround type I vestibular hair cells and nerve terminals. The transition epithelium cells were also Na/K-ATPase α1 immunoreactive. Comparison between normal and pathological specimens showed that there was a significant reduction of Na/K-ATPase α1 IR in the saccule vestibular sensory epithelium from patients with Menière's disease, otosclerosis, and sensorineural hearing loss. CONCLUSIONS The decrease of Na/K-ATPase-IR α1 in the saccule vestibular sensory epithelium from patients with otopathologies suggests its critical role in inner ear homeostasis and pathology.
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Affiliation(s)
- Michael P Avillion
- House Ear Clinic, Los Angeles 2100 W. Third St, Ste 111, Los Angeles, CA 90057
| | - Ivan A Lopez
- NIDCD National Temporal Bone Laboratory at UCLA DGSOM at UCLA Los Angeles CA
| | | | - Gail Ishiyama
- Department of Neurology, DGSOM at UCLA Los Angeles CA
| | - Akira Ishiyama
- NIDCD National Temporal Bone Laboratory at UCLA DGSOM at UCLA Los Angeles CA
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Marchetta P, Eckert P, Lukowski R, Ruth P, Singer W, Rüttiger L, Knipper M. Loss of central mineralocorticoid or glucocorticoid receptors impacts auditory nerve processing in the cochlea. iScience 2022; 25:103981. [PMID: 35281733 PMCID: PMC8914323 DOI: 10.1016/j.isci.2022.103981] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 01/26/2022] [Accepted: 02/21/2022] [Indexed: 02/08/2023] Open
Abstract
The key auditory signature that may associate peripheral hearing with central auditory cognitive defects remains elusive. Suggesting the involvement of stress receptors, we here deleted the mineralocorticoid and glucocorticoid receptors (MR and GR) using a CaMKIIα-based tamoxifen-inducible CreERT2/loxP approach to generate mice with single or double deletion of central but not cochlear MR and GR. Hearing thresholds of MRGRCaMKIIαCreERT2 conditional knockouts (cKO) were unchanged, whereas auditory nerve fiber (ANF) responses were larger and faster and auditory steady state responses were improved. Subsequent analysis of single MR or GR cKO revealed discrete roles for both, central MR and GR on cochlear functions. Limbic MR deletion reduced inner hair cell (IHC) ribbon numbers and ANF responses. In contrast, GR deletion shortened the latency and improved the synchronization to amplitude-modulated tones without affecting IHC ribbon numbers. These findings imply that stress hormone-dependent functions of central MR/GR contribute to “precognitive” sound processing in the cochlea. Top-down MR/GR signaling differentially contributes to cochlear sound processing Limbic MR stimulates auditory nerve fiber discharge rates Central GR deteriorates auditory nerve fiber synchrony
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Affiliation(s)
- Philine Marchetta
- University of Tübingen, Department of Otolaryngology, Head and Neck Surgery, Tübingen Hearing Research Centre, Molecular Physiology of Hearing, Elfriede-Aulhorn-Straße 5, 72076 Tübingen, Germany
| | - Philipp Eckert
- University of Tübingen, Department of Otolaryngology, Head and Neck Surgery, Tübingen Hearing Research Centre, Molecular Physiology of Hearing, Elfriede-Aulhorn-Straße 5, 72076 Tübingen, Germany
| | - Robert Lukowski
- University of Tübingen, Institute of Pharmacy, Pharmacology, Toxicology and Clinical Pharmacy, 72076 Tübingen, Germany
| | - Peter Ruth
- University of Tübingen, Institute of Pharmacy, Pharmacology, Toxicology and Clinical Pharmacy, 72076 Tübingen, Germany
| | - Wibke Singer
- University of Tübingen, Department of Otolaryngology, Head and Neck Surgery, Tübingen Hearing Research Centre, Molecular Physiology of Hearing, Elfriede-Aulhorn-Straße 5, 72076 Tübingen, Germany
| | - Lukas Rüttiger
- University of Tübingen, Department of Otolaryngology, Head and Neck Surgery, Tübingen Hearing Research Centre, Molecular Physiology of Hearing, Elfriede-Aulhorn-Straße 5, 72076 Tübingen, Germany
| | - Marlies Knipper
- University of Tübingen, Department of Otolaryngology, Head and Neck Surgery, Tübingen Hearing Research Centre, Molecular Physiology of Hearing, Elfriede-Aulhorn-Straße 5, 72076 Tübingen, Germany
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Stephenson R, Mangasarian A, Ishiyama G, Hosokawa K, Hosokawa S, Ishiyama A, Lopez IA. Immunohistochemical location of Na +, K +-ATPase α1 subunit in the human inner ear. Hear Res 2020; 400:108113. [PMID: 33221698 DOI: 10.1016/j.heares.2020.108113] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 10/20/2020] [Accepted: 11/09/2020] [Indexed: 01/12/2023]
Abstract
Na+, K+-ATPase (Na,K-ATPase) is an ubiquitous enzyme in the inner ear and a key factor in the maintenance of the osmotic gradient of the endolymph. This study uses Na,K-ATPase α1 subunit immunoreactivity (IR) to identify cellular structures in the normal and disease human cochlea. Formalin-fixed celloidin-embedded (FFCE) human temporal bone sections were immunoreacted with mouse monoclonal antibodies against Na,K-ATPase α1 subunit. Na,K-ATPase α1 IR was examined in the cochlea of 30 patients: four with normal hearing, 5 with Meniere's disease, and 21 with other inner ear diseases: 11 male, 19 female; ages 42 to 96 years-old (yo), average age of 77 yo. Na,K-ATPase α1 IR area was quantified using the ImageJ software program. Na,K-ATPase α1 IR was located in the stria vascularis, and in type I, II and IV fibrocytes of the spiral ligament in the cochlea from patients with normal hearing. Na,K-ATPase α1 IR was seen in Deiters's cells and inner phalangeal cells of the organ of Corti. Na,K-ATPase α1 IR was present in satellite cells that surround the neurons of the spiral ganglia. In the inner ear of pathological specimens, Na,K-ATPase IR area was decreased (compared to the normal) in the stria vascularis, supporting cells in the organ of Corti and satellite cells of the spiral ganglia. These results show that Na,K-ATPase α1 IR is a good marker to identify cellular structures of the human inner ear and may be used to study cellular changes in the cochlea associated with aging and disease. The ubiquitous localization of Na,K-ATPase α1 in the human cochlea is consistent with the Na,K-ATPase role in ionic homeostasis and osmolarity, similar to that seen in animal models.
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Affiliation(s)
- Ryan Stephenson
- Department of Head and Neck Surgery, David Geffen School of Medicine at UCLA, University of California, Los Angeles, USA
| | - Astkhik Mangasarian
- Department of Head and Neck Surgery, David Geffen School of Medicine at UCLA, University of California, Los Angeles, USA
| | - Gail Ishiyama
- Department of Neurology, David Geffen School of Medicine at UCLA, University of California, Los Angeles, USA
| | - Kumiko Hosokawa
- Department of Head and Neck Surgery, David Geffen School of Medicine at UCLA, University of California, Los Angeles, USA; Department of Otorhinolaryngology/ Head & Neck Surgery, c Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Seiji Hosokawa
- Department of Head and Neck Surgery, David Geffen School of Medicine at UCLA, University of California, Los Angeles, USA; Department of Otorhinolaryngology/ Head & Neck Surgery, c Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Akira Ishiyama
- Department of Head and Neck Surgery, David Geffen School of Medicine at UCLA, University of California, Los Angeles, USA
| | - Ivan A Lopez
- Department of Head and Neck Surgery, David Geffen School of Medicine at UCLA, University of California, Los Angeles, USA.
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Kil SH, Kalinec F. Expression and dexamethasone-induced nuclear translocation of glucocorticoid and mineralocorticoid receptors in guinea pig cochlear cells. Hear Res 2013; 299:63-78. [PMID: 23403298 PMCID: PMC3633732 DOI: 10.1016/j.heares.2013.01.020] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/18/2012] [Revised: 01/14/2013] [Accepted: 01/27/2013] [Indexed: 12/20/2022]
Abstract
Glucocorticoids (GC) are powerful anti-inflammatory agents frequently used to protect the auditory organ against damage associated with a variety of conditions, including noise exposure and ototoxic drugs as well as bacterial and viral infections. In addition to glucocorticoid receptors (GC-R), natural and synthetic GC are known to bind mineralocorticoid receptors (MC-R) with great affinity. We used light and laser scanning confocal microscopy to investigate the expression of GC-R and MC-R in different cell populations of the guinea pig cochlea, and their translocation to different cell compartments after treatment with the synthetic GC dexamethasone. We found expression of both types of receptors in the cytoplasm and nucleus of sensory inner and outer hair cells as well as pillar, Hensen and Deiters cells in the organ of Corti, inner and outer sulcus cells, spiral ganglion neurons and several types of spiral ligament and spiral limbus cells; stria vascularis cells expressed mostly MC-R whereas fibrocytes type IV were positive for GC-R only. GC-R and MC-R were also localized at or near the plasma membrane of pillar cells and outer hair cells, whereas GC-R were found at or near the plasma membrane of Hensen cells only. We investigated the relative levels of receptor expression in the cytoplasm and the nucleus of Hensen cells treated with dexamethasone, and found they varied in a way suggestive of dose-induced translocation. These results suggest that the oto-protective effects of GC could be associated with the concerted activation of genomic and non-genomic, GC-R and MC-R mediated signaling pathways in different regions of the cochlea.
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Affiliation(s)
- Sung-Hee Kil
- Division of Cell Biology and Genetics, House Research Institute, Los Angeles, CA, 90057, USA
| | - Federico Kalinec
- Division of Cell Biology and Genetics, House Research Institute, Los Angeles, CA, 90057, USA
- Departments of Cell & Neurobiology and Otolaryngology, Keck School of Medicine, University of Southern California, Los Angeles, CA, 90033, USA
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LIMP-2/LGP85 deficiency causes ureteric pelvic junction obstruction, deafness and peripheral neuropathy in mice. Hum Mol Genet 2003. [DOI: 10.1093/hmg/ddg062] [Citation(s) in RCA: 88] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Sato H, Bagger-Sjöbäck D, Hultcrantz M. Vestibular morphology in the mutant mix-mouse. ORL J Otorhinolaryngol Relat Spec 2003; 65:97-102. [PMID: 12824731 DOI: 10.1159/000070773] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2002] [Accepted: 03/06/2003] [Indexed: 11/19/2022]
Abstract
Mix-mice, a new strain of mice with inner ear dysfunction, and their littermates were used in the present study in order to investigate vestibular morphology, visualised by light microscopy (LM) and transmission electron microscopy (TEM). Contrary to the mix-mice, their littermates showed less stained nerve chalices and it was possible to detect that hair cells showed surface herniations and so-called 'blebs' in the apical portion of the epithelium. Sensory hairs showed a disarrayed pattern. The mix-mice had severe microscopical abnormalities: collapse of the membranous cell layer, cavities inside the neuroepithelium, severe loss of hair cells, herniations of the few remaining hair cells and increased supporting cells were evident. In the utricle and saccule, hair cells were missing and the epithelial surface was covered by a single layer of smooth, flattened epithelial cells of hitherto unknown origin.
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Affiliation(s)
- Harushiro Sato
- Institute for Hearing and Communication Research, Karolinska Institutet, Karolinska Hospital, Stockholm, Sweden.
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