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Nguyen VP, Song J, Prieskorn D, Zou J, Li Y, Dolan D, Xu J, Zhang J, Jayasundera KT, Yang J, Raphael Y, Khan N, Iannuzzi M, Bisgaier C, Chen YE, Paulus YM, Yang D. USH2A Gene Mutations in Rabbits Lead to Progressive Retinal Degeneration and Hearing Loss. Transl Vis Sci Technol 2023; 12:26. [PMID: 36795064 PMCID: PMC9940772 DOI: 10.1167/tvst.12.2.26] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Accepted: 12/11/2022] [Indexed: 02/17/2023] Open
Abstract
Purpose Mutations in USH2A gene are responsible for the greatest proportion of the Usher Syndrome (USH) population, among which more than 30% are frameshift mutations on exon 13. A clinically relevant animal model has been absent for USH2A-related vision loss. Here we sought to establish a rabbit model carrying USH2A frameshift mutation on exon 12 (human exon 13 equivalent). Methods CRISPR/Cas9 reagents targeting the rabbit USH2A exon 12 were delivered into rabbit embryos to produce an USH2A mutant rabbit line. The USH2A knockout animals were subjected to a series of functional and morphological analyses, including acoustic auditory brainstem responses, electroretinography, optical coherence tomography, fundus photography, fundus autofluorescence, histology, and immunohistochemistry. Results The USH2A mutant rabbits exhibit hyper-autofluorescent signals on fundus autofluorescence and hyper-reflective signals on optical coherence tomography images as early as 4 months of age, which indicate retinal pigment epithelium damage. Auditory brainstem response measurement in these rabbits showed moderate to severe hearing loss. Electroretinography signals of both rod and cone function were decreased in the USH2A mutant rabbits starting from 7 months of age and further decreased at 15 to 22 months of age, indicating progressive photoreceptor degeneration, which is confirmed by histopathological examination. Conclusions Disruption of USH2A gene in rabbits is sufficient to induce hearing loss and progressive photoreceptor degeneration, mimicking the USH2A clinical disease. Translational Relevance To our knowledge, this study presents the first mammalian model of USH2 showing the phenotype of retinitis pigmentosa. This study supports the use of rabbits as a clinically relevant large animal model to understand the pathogenesis and to develop novel therapeutics for Usher syndrome.
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Affiliation(s)
- Van Phuc Nguyen
- W.K. Kellogg Eye Center, Department of Ophthalmology and Visual Sciences, University of Michigan, Ann Arbor, MI, USA
| | - Jun Song
- Center for Advanced Models for Translational Sciences and Therapeutics, University of Michigan, Ann Arbor, MI, USA
| | - Diane Prieskorn
- Kresge Hearing Research Institute, Department of Otolaryngology-Head and Neck Surgery, University of Michigan, Ann Arbor, MI, USA
| | - Junhuang Zou
- John A. Moran Eye Center, Department of Ophthalmology, University of Utah Medical School, Salt Lake City, UT, USA
| | - Yanxiu Li
- W.K. Kellogg Eye Center, Department of Ophthalmology and Visual Sciences, University of Michigan, Ann Arbor, MI, USA
| | - David Dolan
- Kresge Hearing Research Institute, Department of Otolaryngology-Head and Neck Surgery, University of Michigan, Ann Arbor, MI, USA
| | - Jie Xu
- Center for Advanced Models for Translational Sciences and Therapeutics, University of Michigan, Ann Arbor, MI, USA
| | - Jifeng Zhang
- Center for Advanced Models for Translational Sciences and Therapeutics, University of Michigan, Ann Arbor, MI, USA
| | - K. Thiran Jayasundera
- W.K. Kellogg Eye Center, Department of Ophthalmology and Visual Sciences, University of Michigan, Ann Arbor, MI, USA
| | - Jun Yang
- John A. Moran Eye Center, Department of Ophthalmology, University of Utah Medical School, Salt Lake City, UT, USA
| | - Yehoash Raphael
- Kresge Hearing Research Institute, Department of Otolaryngology-Head and Neck Surgery, University of Michigan, Ann Arbor, MI, USA
| | - Naheed Khan
- W.K. Kellogg Eye Center, Department of Ophthalmology and Visual Sciences, University of Michigan, Ann Arbor, MI, USA
| | | | | | - Y. Eugene Chen
- Center for Advanced Models for Translational Sciences and Therapeutics, University of Michigan, Ann Arbor, MI, USA
| | - Yannis M. Paulus
- W.K. Kellogg Eye Center, Department of Ophthalmology and Visual Sciences, University of Michigan, Ann Arbor, MI, USA
| | - Dongshan Yang
- Center for Advanced Models for Translational Sciences and Therapeutics, University of Michigan, Ann Arbor, MI, USA
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Xu J, Zhang J, Yang D, Song J, Pallas B, Zhang C, Hu J, Peng X, Christensen ND, Han R, Chen YE. Gene Editing in Rabbits: Unique Opportunities for Translational Biomedical Research. Front Genet 2021; 12:642444. [PMID: 33584832 PMCID: PMC7876448 DOI: 10.3389/fgene.2021.642444] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Accepted: 01/04/2021] [Indexed: 11/13/2022] Open
Abstract
The rabbit is a classic animal model for biomedical research, but the production of gene targeted transgenic rabbits had been extremely challenging until the recent advent of gene editing tools. More than fifty gene knockout or knock-in rabbit models have been reported in the past decade. Gene edited (GE) rabbit models, compared to their counterpart mouse models, may offer unique opportunities in translational biomedical research attributed primarily to their relatively large size and long lifespan. More importantly, GE rabbit models have been found to mimic several disease pathologies better than their mouse counterparts particularly in fields focused on genetically inherited diseases, cardiovascular diseases, ocular diseases, and others. In this review we present selected examples of research areas where GE rabbit models are expected to make immediate contributions to the understanding of the pathophysiology of human disease, and support the development of novel therapeutics.
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Affiliation(s)
- Jie Xu
- Center for Advanced Models for Translational Sciences and Therapeutics, University of Michigan Medical Center, University of Michigan Medical School, Ann Arbor, MI, United States
| | - Jifeng Zhang
- Center for Advanced Models for Translational Sciences and Therapeutics, University of Michigan Medical Center, University of Michigan Medical School, Ann Arbor, MI, United States
| | - Dongshan Yang
- Center for Advanced Models for Translational Sciences and Therapeutics, University of Michigan Medical Center, University of Michigan Medical School, Ann Arbor, MI, United States
| | - Jun Song
- Center for Advanced Models for Translational Sciences and Therapeutics, University of Michigan Medical Center, University of Michigan Medical School, Ann Arbor, MI, United States
| | - Brooke Pallas
- Unit for Laboratory Animal Medicine, University of Michigan Medical School, Ann Arbor, MI, United States
| | - Chen Zhang
- Biomedical Sciences and Biophysics Graduate Program, Division of Cardiac Surgery, Department of Surgery, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH, United States
| | - Jiafen Hu
- Department of Pathology and Laboratory Medicine, Penn State Cancer Institute, Hershey, PA, United States
| | - Xuwen Peng
- Department of Comparative Medicine, Penn State University College of Medicine, Hershey, PA, United States
| | - Neil D Christensen
- Department of Pathology and Laboratory Medicine, Penn State Cancer Institute, Hershey, PA, United States.,Department of Microbiology and Immunology, Penn State University College of Medicine, Hershey, PA, United States
| | - Renzhi Han
- Biomedical Sciences and Biophysics Graduate Program, Division of Cardiac Surgery, Department of Surgery, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH, United States
| | - Y Eugene Chen
- Center for Advanced Models for Translational Sciences and Therapeutics, University of Michigan Medical Center, University of Michigan Medical School, Ann Arbor, MI, United States
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Kominami T, Ueno S, Nishida K, Inooka D, Kominami A, Kondo M, Terasaki H. Electrically Evoked Potentials Are Reduced Compared to Axon Numbers in Rhodopsin P347L Transgenic Rabbits With Severe Photoreceptor Degeneration. Invest Ophthalmol Vis Sci 2019; 60:2543-2550. [PMID: 31206141 DOI: 10.1167/iovs.19-26972] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Purpose To determine the relationship between the amplitudes of the electrically evoked potentials (EEPs) and the number of optic nerve axons at a late stage of retinal degeneration in rhodopsin P347L transgenic (Tg) rabbits, a model of retinitis pigmentosa. Methods Six eyes of six wild-type (WT) (43.8 ± 7.5 months of age) and six eyes of six Tg (40.3 ± 2.6 months of age) rabbits were studied. The EEPs were elicited by 1 to 5 mA of transcorneal electrical stimulation. The first positive wave, the P1 component, was analyzed. After euthanasia, the number of axons in the optic nerve was counted. Results The threshold current to elicit a P1 was significantly higher in Tg rabbits than WT rabbits. The amplitude of P1 elicited by 5 mA in Tg rabbits was about 24% of that in WT rabbits (P < 0.01). The number of axons in the optic nerve of Tg rabbits was reduced to about 59% of that of WT rabbits (P < 0.01). The correlation between the axon number and the amplitude of the P1 in Tg and WT rabbits was not significant. The mean ratio of the P1 amplitude/axon in Tg rabbits was decreased to 53% of that in WT rabbits (P < 0.05). Conclusions The degree of reduction in the EEP in Tg rabbits is more severe than the reduction in the number of optic nerve axons. The use of transcorneal electrical stimulation to determine the suitable candidates for prosthesis at the end-stage of retinitis pigmentosa may underestimate the condition of the optic nerves.
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Affiliation(s)
- Taro Kominami
- Department of Ophthalmology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Shinji Ueno
- Department of Ophthalmology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Kentaro Nishida
- Department of Ophthalmology, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Daiki Inooka
- Department of Ophthalmology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Azusa Kominami
- Department of Ophthalmology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Mineo Kondo
- Department of Ophthalmology, Mie University Graduate School of Medicine, Tsu, Japan
| | - Hiroko Terasaki
- Department of Ophthalmology, Nagoya University Graduate School of Medicine, Nagoya, Japan
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Ueno S, Kominami T, Okado S, Inooka D, Kondo M, Terasaki H. Course of loss of photoreceptor function and progressive Müller cell gliosis in rhodopsin P347L transgenic rabbits. Exp Eye Res 2019; 184:192-200. [PMID: 31029790 DOI: 10.1016/j.exer.2019.04.026] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Revised: 04/17/2019] [Accepted: 04/24/2019] [Indexed: 01/31/2023]
Abstract
Long living animal models of retinitis pigmentosa (RP) can provide important information on the retinal changes that occur at the late stages of photoreceptor degeneration. The rhodopsin Pro347Leu transgenic rabbit (P347L Tg) is a model of RP, and it has been used to analyze the functional and morphological changes in the retina following the degeneration of the photoreceptors. They have also been used to test newly-developed therapies to treat eyes with photoreceptor degeneration. However, assessments of the retinal changes in P347L Tg rabbits older than 1-year have not been reported even though the data are important for research on developing new therapies to restore vision at the end stages of RP. The purpose of this study was to determine the time course of the loss of photoreceptor function and the changes in the morphology of the retina of P347L Tg rabbits. The experiments were performed on 26 older P347L Tg rabbits. The results showed that the amplitudes of the ERGs of the P347L Tg rabbits gradually decreased and reached <10 μV between 30- and 54-months-of-age. Histological analysis at these later stages showed a loss of the photoreceptor layer, and OCT analysis showed absence of the layering of the retina. However, the thickness between the inner limiting membrane and the outer plexiform layer was about 1.7 times thicker than the corresponding thickness of WT rabbits in the OCT images. This thickening was caused by a marked gliosis of the entire retina which was confirmed by light and transmission electron microscopy. In addition, immunohistochemical analysis showed there was excessive staining of the glial fibrillary acid protein in the older P347L Tg rabbits although the rod ON bipolar cells and horizontal cells were still present in the inner nuclear layer. Our results indicate that the P347L Tg rabbit progressed to complete photoreceptor loss within 30- and 54-months-of-age and severe gliosis altered the morphology of the retina.
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Affiliation(s)
- Shinji Ueno
- Department of Ophthalmology, Nagoya University Graduate School of Medicine, Nagoya, Japan.
| | - Taro Kominami
- Department of Ophthalmology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Satoshi Okado
- Department of Ophthalmology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Daiki Inooka
- Department of Ophthalmology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Mineo Kondo
- Department of Ophthalmology, Mie University Graduate School of Medicine, Tsu, Japan
| | - Hiroko Terasaki
- Department of Ophthalmology, Nagoya University Graduate School of Medicine, Nagoya, Japan
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Sayo A, Ueno S, Kominami T, Okado S, Inooka D, Komori S, Terasaki H. Significant Relationship of Visual Field Sensitivity in Central 10° to Thickness of Retinal Layers in Retinitis Pigmentosa. Invest Ophthalmol Vis Sci 2019; 59:3469-3475. [PMID: 30025100 DOI: 10.1167/iovs.18-24635] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Purpose To determine the relationship between the sensitivity of the retina in the central 10° and the thickness of the retinal layers in patients with retinitis pigmentosa (RP). Methods Fifty-two RP patients were studied. All of the patients had been examined by the Humphrey Field Analyzer 10-2 program (HFA10-2) and spectral-domain optical coherence tomography (SD-OCT). The thicknesses of the photoreceptor outer segment (OS), outer nuclear layer (ONL), inner nuclear layer (INL), and the retinal nerve fiber layer (RNFL) were measured at 1°, 3°, 5°, 7°, and 9° from the fovea. The same measurements were made on the SD-OCT images of 40 healthy subjects and used as controls. The relationships between the retinal sensitivities and retinal layer thicknesses were determined. Results The thicknesses of the OS and ONL and their product were significantly and positively correlated with the retinal sensitivities. The thickness of the INL was significantly and negatively correlated with the sensitivity. The strongest correlation with the sensitivity was with the OS thickness (marginal R2 [mR2] = 0.525, P < 0.001), followed by the product of the OS and ONL thicknesses (mR2 = 0.420, P < 0.001), ONL thickness (mR2 = 0.416, P < 0.001), and the INL thickness (mR2 = 0.014, P = 0.044). The thickness of the RNFL was not correlated with the sensitivity (mR2 = 0.005, P = 0.331). Conclusions In contrast to previous reports, the thickness of the OS reflected the retinal sensitivity better than the product of OS and ONL.
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Affiliation(s)
- Akira Sayo
- Department of Ophthalmology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Shinji Ueno
- Department of Ophthalmology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Taro Kominami
- Department of Ophthalmology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Satoshi Okado
- Department of Ophthalmology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Daiki Inooka
- Department of Ophthalmology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Shiori Komori
- Department of Ophthalmology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Hiroko Terasaki
- Department of Ophthalmology, Nagoya University Graduate School of Medicine, Nagoya, Japan
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Assessment of Safety and Functional Efficacy of Stem Cell-Based Therapeutic Approaches Using Retinal Degenerative Animal Models. Stem Cells Int 2017; 2017:9428176. [PMID: 28928775 PMCID: PMC5592015 DOI: 10.1155/2017/9428176] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2017] [Accepted: 06/19/2017] [Indexed: 02/06/2023] Open
Abstract
Dysfunction and death of retinal pigment epithelium (RPE) and or photoreceptors can lead to irreversible vision loss. The eye represents an ideal microenvironment for stem cell-based therapy. It is considered an “immune privileged” site, and the number of cells needed for therapy is relatively low for the area of focused vision (macula). Further, surgical placement of stem cell-derived grafts (RPE, retinal progenitors, and photoreceptor precursors) into the vitreous cavity or subretinal space has been well established. For preclinical tests, assessments of stem cell-derived graft survival and functionality are conducted in animal models by various noninvasive approaches and imaging modalities. In vivo experiments conducted in animal models based on replacing photoreceptors and/or RPE cells have shown survival and functionality of the transplanted cells, rescue of the host retina, and improvement of visual function. Based on the positive results obtained from these animal experiments, human clinical trials are being initiated. Despite such progress in stem cell research, ethical, regulatory, safety, and technical difficulties still remain a challenge for the transformation of this technique into a standard clinical approach. In this review, the current status of preclinical safety and efficacy studies for retinal cell replacement therapies conducted in animal models will be discussed.
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Jones MK, Lu B, Girman S, Wang S. Cell-based therapeutic strategies for replacement and preservation in retinal degenerative diseases. Prog Retin Eye Res 2017; 58:1-27. [PMID: 28111323 PMCID: PMC5441967 DOI: 10.1016/j.preteyeres.2017.01.004] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Revised: 01/08/2017] [Accepted: 01/17/2017] [Indexed: 12/13/2022]
Abstract
Cell-based therapeutics offer diverse options for treating retinal degenerative diseases, such as age-related macular degeneration (AMD) and retinitis pigmentosa (RP). AMD is characterized by both genetic and environmental risks factors, whereas RP is mainly a monogenic disorder. Though treatments exist for some patients with neovascular AMD, a majority of retinal degenerative patients have no effective therapeutics, thus indicating a need for universal therapies to target diverse patient populations. Two main cell-based mechanistic approaches are being tested in clinical trials. Replacement therapies utilize cell-derived retinal pigment epithelial (RPE) cells to supplant lost or defective host RPE cells. These cells are similar in morphology and function to native RPE cells and can potentially supplant the responsibilities of RPE in vivo. Preservation therapies utilize supportive cells to aid in visual function and photoreceptor preservation partially by neurotrophic mechanisms. The goal of preservation strategies is to halt or slow the progression of disease and maintain remaining visual function. A number of clinical trials are testing the safety of replacement and preservation cell therapies in patients; however, measures of efficacy will need to be further evaluated. In addition, a number of prevailing concerns with regards to the immune-related response, longevity, and functionality of the grafted cells will need to be addressed in future trials. This review will summarize the current status of cell-based preclinical and clinical studies with a focus on replacement and preservation strategies and the obstacles that remain regarding these types of treatments.
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Affiliation(s)
- Melissa K Jones
- Board of Governors Regenerative Medicine Institute, Cedars-Sinai Medical Center, 8700 Beverly Blvd., Los Angeles, CA 90048, USA; Department of Biomedical Sciences, Cedars-Sinai Medical Center, 8700 Beverly Blvd., Los Angeles, CA 90048, USA
| | - Bin Lu
- Board of Governors Regenerative Medicine Institute, Cedars-Sinai Medical Center, 8700 Beverly Blvd., Los Angeles, CA 90048, USA; Department of Biomedical Sciences, Cedars-Sinai Medical Center, 8700 Beverly Blvd., Los Angeles, CA 90048, USA
| | - Sergey Girman
- Board of Governors Regenerative Medicine Institute, Cedars-Sinai Medical Center, 8700 Beverly Blvd., Los Angeles, CA 90048, USA; Department of Biomedical Sciences, Cedars-Sinai Medical Center, 8700 Beverly Blvd., Los Angeles, CA 90048, USA
| | - Shaomei Wang
- Board of Governors Regenerative Medicine Institute, Cedars-Sinai Medical Center, 8700 Beverly Blvd., Los Angeles, CA 90048, USA; Department of Biomedical Sciences, Cedars-Sinai Medical Center, 8700 Beverly Blvd., Los Angeles, CA 90048, USA; David Geffen School of Medicine, University of California Los Angeles, 10833 Le Conte Ave., Los Angeles, CA 90095, USA.
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Asakawa K, Ishikawa H, Uga S, Mashimo K, Shimizu K, Kondo M, Terasaki H. Functional and morphological study of retinal photoreceptor cell degeneration in transgenic rabbits with a Pro347Leu rhodopsin mutation. Jpn J Ophthalmol 2015; 59:353-63. [PMID: 26245743 DOI: 10.1007/s10384-015-0400-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2014] [Accepted: 06/24/2015] [Indexed: 10/23/2022]
Abstract
PURPOSE To investigate the process of retinal degeneration by analyzing the functional and morphological findings in transgenic rabbits with a Pro347Leu rhodopsin mutation. METHODS Wild-type (WT) and transgenic (Tg) rabbits at ages 4, 8 and 12 months were used. We conducted functional evaluation by recording the changes in the pupil response to red and blue light stimulation and the amplitude of the electroretinography (ERG). Morphologically, rod and cone distribution was examined using light and electron microscopy. Immunostaining for the identification of retinal ganglion cells (RGCs) was also confirmed by injecting a TUJ-1 monoclonal antibody. RESULTS Pupil constriction for infrared pupillography and the a- and b-waves for ERG in Tg rabbits decreased with increasing age; the differences were compared to the age-matched WT rabbits. The subnormal ERG in the Tg rabbits, especially the a-wave decrease and pupil constriction with a long latency time, was induced only during exposure to blue light stimulation at 12 months. Light and electron microscopic findings showed a progressive loss of photoreceptor cells over time manifesting by 8 months in the peripheral retina. Moreover, pyknotic nuclei of the outer nuclear layer in the center of the visual streak were observed. At 12 months, there was disappearance of the rods and ballooning degeneration of the cones. Some remaining RGCs had large cell bodies with long branching dendrites. CONCLUSIONS The changes in the pupil light response and amplitude of the ERG could be used to predict the state of retinal degeneration in the Tg rabbit.
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Affiliation(s)
- Ken Asakawa
- Department of Orthoptics and Visual Science, Kitasato University School of Allied Health Sciences, 1-15-1 Kitasato, Minami-Ku, Sagamihara, Kanagawa, 252-0373, Japan.
| | - Hitoshi Ishikawa
- Department of Orthoptics and Visual Science, Kitasato University School of Allied Health Sciences, 1-15-1 Kitasato, Minami-Ku, Sagamihara, Kanagawa, 252-0373, Japan
| | - Shigekazu Uga
- Department of Orthoptics and Visual Science, Kitasato University School of Allied Health Sciences, 1-15-1 Kitasato, Minami-Ku, Sagamihara, Kanagawa, 252-0373, Japan
| | - Kimiyo Mashimo
- Department of Ophthalmology, Kitasato University School of Medicine, Sagamihara, Kanagawa, Japan
| | - Kimiya Shimizu
- Department of Ophthalmology, Kitasato University School of Medicine, Sagamihara, Kanagawa, Japan
| | - Mineo Kondo
- Department of Ophthalmology, Mie University Graduate School, School of Medicine, Mie, Japan
| | - Hiroko Terasaki
- Department of Ophthalmology, Nagoya University Graduate School, School of Medicine, Nagoya, Japan
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Ueno S, Nakanishi A, Nishi K, Suzuki S, Terasaki H. Case of paraneoplastic retinopathy with retinal ON-bipolar cell dysfunction and subsequent resolution of ERGs. Doc Ophthalmol 2014; 130:71-6. [PMID: 25391361 DOI: 10.1007/s10633-014-9470-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2014] [Accepted: 11/07/2014] [Indexed: 01/14/2023]
Abstract
PURPOSE To report a patient with cancer-associated retinopathy and retinal ON-bipolar cell dysfunction who had a resolution of the electroretinograms (ERGs) after a resection of an ovarian cancer and chemotherapy. CASE REPORT A 71-year-old Japanese female patient visited us complaining of night blindness and photopsia in both eyes for 6 months. Her visual acuity was 20/20 in both eyes, and fundus examination, fluorescence angiography, and optical coherence tomography showed no abnormalities in both eyes. The rod responses of the ERGs were absent and bright-flash ERGs were electronegative. The ON responses of the focal macular ERGs and full-field long-flash ERGs were absent. These ERG findings indicate an ON-bipolar cell dysfunction. A general physical examination revealed the presence of ovarian cancer. After resection of the ovarian cancer and adjuvant chemotherapy, the ERGs of the left eye completely recovered within 2 years and those of right eye recovered subsequently. The autoantibody against transient receptor potential melastatin 1 (TRPM1) was not detected in the serum. CONCLUSION Our case demonstrates that retinal ON-bipolar dysfunction can be caused by ovarian cancer. Our case indicates that some autoantibodies against other than TRPM1 might cause transient dysfunction of retinal ON-bipolar cells.
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Affiliation(s)
- Shinji Ueno
- Department of Ophthalmology, Nagoya University Graduate School of Medicine, 65 Tsuruma-cho, Showa-ku, Nagoya City, Aichi, 466-8550, Japan,
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