1
|
Liu PK, Lee W, Su PY, Kim AH, Kang EYC, Levi SR, Jenny LA, Lin PH, Chi YC, Wu PL, Wang EHH, Chang YC, Liu L, Chen KJ, Hwang YS, Wu WC, Lai CC, Tsang SH, Allikmets R, Wang NK. Cross-Sectional Analysis of Outer Retinal Tubulation in Inherited Retinal Diseases: A Multicenter Study. Am J Ophthalmol 2024; 269:116-135. [PMID: 39127396 DOI: 10.1016/j.ajo.2024.07.032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2024] [Revised: 06/22/2024] [Accepted: 07/21/2024] [Indexed: 08/12/2024]
Abstract
PURPOSE This study aims to explore genetic variants that potentially lead to outer retinal tubulation (ORT), estimate the prevalence of ORT in these candidate genes, and investigate the clinical etiology of ORT in patients with inherited retinal diseases (IRDs), with respect to each gene. DESIGN Retrospective cohort study. METHODS A retrospective cross-sectional review was conducted on 565 patients with molecular diagnoses of IRD, confirming the presence of ORT as noted in each patient's respective spectral-domain optical coherence tomography (SD-OCT) imaging. Using SD-OCT imaging, the presence of ORT was analyzed in relation to specific genetic variants and phenotypic characteristics. Outcomes included the observed ORT frequencies across 2 gene-specific cohorts: non-retinal pigment epithelium (RPE)-specific genes, and RPE-specific genes; and to investigate the analogous characteristics caused by variants in these genes. RESULTS Among the 565 patients included in this study, 104 exhibited ORT on SD-OCT. We observed ORT frequencies among the following genes from our patient cohort: 100% (23/23) for CHM, 100% (2/2) for PNPLA6, 100% (4/4) for RCBTB1, 100% for mtDNA [100% (4/4) for MT-TL1 and 100% (1/1) for mtDNA deletion], 100% (1/1) for OAT, 95.2% (20/21) for CYP4V2, 72.7% (8/11) for CHM female carriers, 66.7% (2/3) for C1QTNF5, 57.1% (8/14) for PROM1, 53.8% (7/13) for PRPH2, 42.9% (3/7) for CERKL, 28.6% (2/7) for CDHR1, 20% (1/5) for RPE65, 4% (18/445) for ABCA4. In contrast, ORT was not observed in any patients with photoreceptor-specific gene variants, such as RHO (n = 13), USH2A (n = 118), EYS (n = 70), PDE6B (n = 10), PDE6A (n = 4), and others. CONCLUSIONS These results illustrate a compelling association between the presence of ORT and IRDs caused by variants in RPE-specific genes, as well as non-RPE-specific genes. In contrast, IRDs caused by photoreceptor-specific genes are typically not associated with ORT occurrence. Further analysis revealed that ORT tends to manifest in IRDs with milder intraretinal pigment migration (IPM), a finding that is typically associated with RPE-specific genes. These findings regarding ORT, genetic factors, atrophic patterns in the fundus, and IPM provide valuable insight into the complex etiology of IRDs. Future prospective studies are needed to further explore the association and underlying mechanisms of ORT in these contexts.
Collapse
Affiliation(s)
- Pei-Kang Liu
- From the Department of Ophthalmology (P-K.L., W.L., P-Y.S., A-H.K., E.Y-C.K., S.R.L., L.A.J., P-H.L., P-L.W., E.H-H.W., S.H.T., R.A., N-K.W.), Edward S. Harkness Eye Institute, Columbia University, New York, New York, USA; Department of Ophthalmology (P-K.L., Yi-C.C., Yo-C.C.), Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan; School of Medicine (P-K.L., Yi-C.C., Yo-C.C.), College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Winston Lee
- From the Department of Ophthalmology (P-K.L., W.L., P-Y.S., A-H.K., E.Y-C.K., S.R.L., L.A.J., P-H.L., P-L.W., E.H-H.W., S.H.T., R.A., N-K.W.), Edward S. Harkness Eye Institute, Columbia University, New York, New York, USA
| | - Pei-Yin Su
- From the Department of Ophthalmology (P-K.L., W.L., P-Y.S., A-H.K., E.Y-C.K., S.R.L., L.A.J., P-H.L., P-L.W., E.H-H.W., S.H.T., R.A., N-K.W.), Edward S. Harkness Eye Institute, Columbia University, New York, New York, USA
| | - Angela H Kim
- From the Department of Ophthalmology (P-K.L., W.L., P-Y.S., A-H.K., E.Y-C.K., S.R.L., L.A.J., P-H.L., P-L.W., E.H-H.W., S.H.T., R.A., N-K.W.), Edward S. Harkness Eye Institute, Columbia University, New York, New York, USA
| | - Eugene Yu-Chuan Kang
- From the Department of Ophthalmology (P-K.L., W.L., P-Y.S., A-H.K., E.Y-C.K., S.R.L., L.A.J., P-H.L., P-L.W., E.H-H.W., S.H.T., R.A., N-K.W.), Edward S. Harkness Eye Institute, Columbia University, New York, New York, USA; Department of Ophthalmology (E.Y-C.K., L.L., K-J.C., Y-S.H., W-C.W., C-C.L., N-K.W.), Chang Gung Memorial Hospital, Linkou Medical Center, Taiwan; College of Medicine (E.Y-C.K., K-J.C., Y-S.H., W-C.W., C-C.L., N-K.W.), Chang Gung University, Taoyuan, Taiwan; Graduate Institute of Clinical Medical Sciences (E.Y-C.K.), College of Medicine, Chang Gung University, Taoyuan, Taiwan; College of Arts and Sciences (E.H-H.W.), University of Miami, Coral Gables, Florida, USA
| | - Sarah R Levi
- From the Department of Ophthalmology (P-K.L., W.L., P-Y.S., A-H.K., E.Y-C.K., S.R.L., L.A.J., P-H.L., P-L.W., E.H-H.W., S.H.T., R.A., N-K.W.), Edward S. Harkness Eye Institute, Columbia University, New York, New York, USA
| | - Laura A Jenny
- From the Department of Ophthalmology (P-K.L., W.L., P-Y.S., A-H.K., E.Y-C.K., S.R.L., L.A.J., P-H.L., P-L.W., E.H-H.W., S.H.T., R.A., N-K.W.), Edward S. Harkness Eye Institute, Columbia University, New York, New York, USA
| | - Pei-Hsuan Lin
- From the Department of Ophthalmology (P-K.L., W.L., P-Y.S., A-H.K., E.Y-C.K., S.R.L., L.A.J., P-H.L., P-L.W., E.H-H.W., S.H.T., R.A., N-K.W.), Edward S. Harkness Eye Institute, Columbia University, New York, New York, USA; Department of Ophthalmology (P-H.L.), National Taiwan University Hospital Yunlin Branch, Yunlin, Taiwan
| | - Yi-Chun Chi
- Department of Ophthalmology (P-K.L., Yi-C.C., Yo-C.C.), Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan; School of Medicine (P-K.L., Yi-C.C., Yo-C.C.), College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Pei-Liang Wu
- From the Department of Ophthalmology (P-K.L., W.L., P-Y.S., A-H.K., E.Y-C.K., S.R.L., L.A.J., P-H.L., P-L.W., E.H-H.W., S.H.T., R.A., N-K.W.), Edward S. Harkness Eye Institute, Columbia University, New York, New York, USA; College of Medicine (P-L.W.), National Taiwan University, Taipei, Taiwan
| | - Ethan Hung-Hsi Wang
- From the Department of Ophthalmology (P-K.L., W.L., P-Y.S., A-H.K., E.Y-C.K., S.R.L., L.A.J., P-H.L., P-L.W., E.H-H.W., S.H.T., R.A., N-K.W.), Edward S. Harkness Eye Institute, Columbia University, New York, New York, USA; College of Arts and Sciences (E.H-H.W.), University of Miami, Coral Gables, Florida, USA
| | - Yo-Chen Chang
- Department of Ophthalmology (P-K.L., Yi-C.C., Yo-C.C.), Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan; School of Medicine (P-K.L., Yi-C.C., Yo-C.C.), College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Laura Liu
- Department of Ophthalmology (E.Y-C.K., L.L., K-J.C., Y-S.H., W-C.W., C-C.L., N-K.W.), Chang Gung Memorial Hospital, Linkou Medical Center, Taiwan; School of Traditional Chinese Medicine (L.L.), Chang Gung University, Taoyuan, Taiwan
| | - Kuan-Jen Chen
- Department of Ophthalmology (E.Y-C.K., L.L., K-J.C., Y-S.H., W-C.W., C-C.L., N-K.W.), Chang Gung Memorial Hospital, Linkou Medical Center, Taiwan; College of Medicine (E.Y-C.K., K-J.C., Y-S.H., W-C.W., C-C.L., N-K.W.), Chang Gung University, Taoyuan, Taiwan
| | - Yih-Shiou Hwang
- Department of Ophthalmology (E.Y-C.K., L.L., K-J.C., Y-S.H., W-C.W., C-C.L., N-K.W.), Chang Gung Memorial Hospital, Linkou Medical Center, Taiwan; College of Medicine (E.Y-C.K., K-J.C., Y-S.H., W-C.W., C-C.L., N-K.W.), Chang Gung University, Taoyuan, Taiwan
| | - Wei-Chi Wu
- Department of Ophthalmology (E.Y-C.K., L.L., K-J.C., Y-S.H., W-C.W., C-C.L., N-K.W.), Chang Gung Memorial Hospital, Linkou Medical Center, Taiwan; College of Medicine (E.Y-C.K., K-J.C., Y-S.H., W-C.W., C-C.L., N-K.W.), Chang Gung University, Taoyuan, Taiwan
| | - Chi-Chun Lai
- Department of Ophthalmology (E.Y-C.K., L.L., K-J.C., Y-S.H., W-C.W., C-C.L., N-K.W.), Chang Gung Memorial Hospital, Linkou Medical Center, Taiwan; College of Medicine (E.Y-C.K., K-J.C., Y-S.H., W-C.W., C-C.L., N-K.W.), Chang Gung University, Taoyuan, Taiwan; Department of Ophthalmology (C-C.L.), Chang Gung Memorial Hospital, Keelung, Taiwan
| | - Stephen H Tsang
- From the Department of Ophthalmology (P-K.L., W.L., P-Y.S., A-H.K., E.Y-C.K., S.R.L., L.A.J., P-H.L., P-L.W., E.H-H.W., S.H.T., R.A., N-K.W.), Edward S. Harkness Eye Institute, Columbia University, New York, New York, USA; Department of Pathology and Cell Biology (S.H.T., R.A.), Columbia University Medical Center, New York, New York, USA; Vagelos College of Physicians and Surgeons (S.H.T., R.A., N-K.W.), Columbia University, New York, New York, USA
| | - Rando Allikmets
- From the Department of Ophthalmology (P-K.L., W.L., P-Y.S., A-H.K., E.Y-C.K., S.R.L., L.A.J., P-H.L., P-L.W., E.H-H.W., S.H.T., R.A., N-K.W.), Edward S. Harkness Eye Institute, Columbia University, New York, New York, USA; Department of Pathology and Cell Biology (S.H.T., R.A.), Columbia University Medical Center, New York, New York, USA; Vagelos College of Physicians and Surgeons (S.H.T., R.A., N-K.W.), Columbia University, New York, New York, USA
| | - Nan-Kai Wang
- From the Department of Ophthalmology (P-K.L., W.L., P-Y.S., A-H.K., E.Y-C.K., S.R.L., L.A.J., P-H.L., P-L.W., E.H-H.W., S.H.T., R.A., N-K.W.), Edward S. Harkness Eye Institute, Columbia University, New York, New York, USA; Department of Ophthalmology (E.Y-C.K., L.L., K-J.C., Y-S.H., W-C.W., C-C.L., N-K.W.), Chang Gung Memorial Hospital, Linkou Medical Center, Taiwan; College of Medicine (E.Y-C.K., K-J.C., Y-S.H., W-C.W., C-C.L., N-K.W.), Chang Gung University, Taoyuan, Taiwan; Vagelos College of Physicians and Surgeons (S.H.T., R.A., N-K.W.), Columbia University, New York, New York, USA.
| |
Collapse
|
2
|
Yang TH, Kang EYC, Lin PH, Yu BBC, Wang JHH, Chen V, Wang NK. Mitochondria in Retinal Ganglion Cells: Unraveling the Metabolic Nexus and Oxidative Stress. Int J Mol Sci 2024; 25:8626. [PMID: 39201313 PMCID: PMC11354650 DOI: 10.3390/ijms25168626] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2024] [Revised: 07/29/2024] [Accepted: 07/29/2024] [Indexed: 09/02/2024] Open
Abstract
This review explored the role of mitochondria in retinal ganglion cells (RGCs), which are essential for visual processing. Mitochondrial dysfunction is a key factor in the pathogenesis of various vision-related disorders, including glaucoma, hereditary optic neuropathy, and age-related macular degeneration. This review highlighted the critical role of mitochondria in RGCs, which provide metabolic support, regulate cellular health, and respond to cellular stress while also producing reactive oxygen species (ROS) that can damage cellular components. Maintaining mitochondrial function is essential for meeting RGCs' high metabolic demands and ensuring redox homeostasis, which is crucial for their proper function and visual health. Oxidative stress, exacerbated by factors like elevated intraocular pressure and environmental factors, contributes to diseases such as glaucoma and age-related vision loss by triggering cellular damage pathways. Strategies targeting mitochondrial function or bolstering antioxidant defenses include mitochondrial-based therapies, gene therapies, and mitochondrial transplantation. These advances can offer potential strategies for addressing mitochondrial dysfunction in the retina, with implications that extend beyond ocular diseases.
Collapse
Affiliation(s)
- Tsai-Hsuan Yang
- Department of Education, Chang Gung Memorial Hospital, Linkou Medical Center, Taoyuan 33305, Taiwan;
- College of Medicine, National Yang Ming Chiao Tung University, Taipei 11217, Taiwan
| | - Eugene Yu-Chuan Kang
- Department of Ophthalmology, Chang Gung Memorial Hospital, Linkou Medical Center, Taoyuan 33305, Taiwan;
- College of Medicine, Chang Gung University, Taoyuan 33302, Taiwan
- Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Taoyuan 33302, Taiwan
- Department of Ophthalmology, Edward S. Harkness Eye Institute, Columbia University Irving Medical Center, Columbia University, New York, NY 10032, USA; (P.-H.L.); (J.H.-H.W.); (V.C.)
| | - Pei-Hsuan Lin
- Department of Ophthalmology, Edward S. Harkness Eye Institute, Columbia University Irving Medical Center, Columbia University, New York, NY 10032, USA; (P.-H.L.); (J.H.-H.W.); (V.C.)
- National Taiwan University Hospital, Yunlin 640203, Taiwan
| | - Benjamin Ben-Chi Yu
- Fu Foundation School of Engineering & Applied Science, Columbia University, New York, NY 10027, USA;
| | - Jason Hung-Hsuan Wang
- Department of Ophthalmology, Edward S. Harkness Eye Institute, Columbia University Irving Medical Center, Columbia University, New York, NY 10032, USA; (P.-H.L.); (J.H.-H.W.); (V.C.)
- Columbian College of Arts and Sciences, George Washington University, Washington, DC 20052, USA
| | - Vincent Chen
- Department of Ophthalmology, Edward S. Harkness Eye Institute, Columbia University Irving Medical Center, Columbia University, New York, NY 10032, USA; (P.-H.L.); (J.H.-H.W.); (V.C.)
- Faculty of Health Sciences, Queen’s University, Kingston, ON K7L 3N9, Canada
| | - Nan-Kai Wang
- Department of Ophthalmology, Chang Gung Memorial Hospital, Linkou Medical Center, Taoyuan 33305, Taiwan;
- College of Medicine, Chang Gung University, Taoyuan 33302, Taiwan
- Department of Ophthalmology, Edward S. Harkness Eye Institute, Vagelos College of Physicians and Surgeons, Columbia University Irving Medical Center, Columbia University, New York, NY 10032, USA
| |
Collapse
|
3
|
Gupta PR, O'Connell K, Sullivan JM, Huckfeldt RM. RTN4IP1-associated non-syndromic optic neuropathy and rod-cone dystrophy. Ophthalmic Genet 2024; 45:289-293. [PMID: 38224077 DOI: 10.1080/13816810.2024.2303683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Revised: 12/23/2023] [Accepted: 01/05/2024] [Indexed: 01/16/2024]
Abstract
BACKGROUND Biallelic variants in RTN4IP1 are a well-established cause of syndromic and nonsyndromic early-onset autosomal recessive optic neuropathy. They have more recently been reported to cause a concomitant but later-onset rod-cone dystrophy with or without syndromic features. METHODS A comprehensive evaluation was performed that included assessment of visual and retinal function, clinical examination, and retinal imaging. Childhood ophthalmic records as well as the results of genetic testing were evaluated. RESULTS A 24-year-old female described longstanding reduced visual acuity with more recent subjective impairment of dark adaptation. Visual acuity was subnormal in both eyes. Goldmann kinetic perimetry demonstrated scotomas in a pattern consistent with the presence of both optic neuropathy and rod-cone dystrophy with fundus exam as well as retinal imaging showing corroborating findings. Full-field electroretinography further confirmed the presence of a rod-cone dystrophy. Genetic testing demonstrated biallelic variants in RTN4IP1, one of which was novel, in association with the ocular findings. CONCLUSIONS RTN4IP1-associated early-onset bilateral optic neuropathy with rod-cone dystrophy is a recently described clinical entity with limited reports available to-date. The present case provides additional support for this dual phenotype and identifies a novel causative variant.
Collapse
Affiliation(s)
- Priya R Gupta
- Massachusetts Eye and Ear Infirmary, Harvard Medical School, Boston, Massachusetts, USA
| | - Kaitlin O'Connell
- Massachusetts Eye and Ear Infirmary, Harvard Medical School, Boston, Massachusetts, USA
| | - Jack M Sullivan
- Ira G. Ross Eye Institute (Department of Ophthalmology), Jacobs School of Medicine and Biomedical Sciences, University of Buffalo, Buffalo, New York, USA
- Department of Ophthalmology, VA Western NY Healthcare System, Buffalo, New York, USA
| | - Rachel M Huckfeldt
- Massachusetts Eye and Ear Infirmary, Harvard Medical School, Boston, Massachusetts, USA
| |
Collapse
|
4
|
Wang NK, Liu PK, Kong Y, Tseng YJ, Jenny LA, Nolan ND, Chen N, Wang HH, Hsu CW, Huang WC, Sparrow JR, Lin CS, Tsang SH. Spatiotemporal control of genome engineering in cone photoreceptors. Cell Biosci 2023; 13:119. [PMID: 37381060 PMCID: PMC10304375 DOI: 10.1186/s13578-023-01033-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Accepted: 04/15/2023] [Indexed: 06/30/2023] Open
Abstract
BACKGROUND Cones are essential for color recognition, high resolution, and central vision; therefore cone death causes blindness. Understanding the pathophysiology of each cell type in the retina is key to developing therapies for retinal diseases. However, studying the biology of cone cells in the rod-dominant mammalian retina is particularly challenging. In this study, we used a bacterial artificial chromosome (BAC) recombineering method to knock in the "CreERT2" sequence into the Gnat2 and Arr3 genes, respectively and generated three novel inducible CreERT2 mice with different cone cell specificities. RESULTS These models (Gnat2CreERT2, Arr3T2ACreERT2, and Arr3P2ACreERT2) express temporally controllable Cre recombinase that achieves conditional alleles in cone photoreceptors. Cre-LoxP recombination can be induced as early as postnatal day (PD) two upon tamoxifen injection at varying efficiencies, ranging from 10 to 15% in Gnat2CreERT2, 40% in Arr3T2ACreERT2, and 100% in Arr3P2ACreERT2. Notably, knocking in the P2A-CreERT2 cassette does not affect cone cell morphology and functionality. Most cone-phototransduction enzymes, including Opsins, CNGA3, etc. are not altered except for a reduction in the Arr3 transcript. CONCLUSIONS The Arr3P2ACreERT2 mouse, an inducible cone-specific Cre driver, is a valuable line in studying cone cell biology, function, as well as its relationship with rod and other retinal cells. Moreover, the Cre activity can be induced by delivering tamoxifen intragastrically as early as PD2, which will be useful for studying retinal development or in rapid degenerative mouse models.
Collapse
Affiliation(s)
- Nan-Kai Wang
- Edward S. Harkness Eye Institute, Department of Ophthalmology, Columbia University Irving Medical Center, New York, NY, 10032, USA.
- Vagelos College of Physicians and Surgeons, Columbia University, New York, USA.
| | - Pei-Kang Liu
- Edward S. Harkness Eye Institute, Department of Ophthalmology, Columbia University Irving Medical Center, New York, NY, 10032, USA
- Department of Ophthalmology, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
- School of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
- Institute of Biomedical Sciences, National Sun Yat-sen University, Kaohsiung, Taiwan
| | - Yang Kong
- Edward S. Harkness Eye Institute, Department of Ophthalmology, Columbia University Irving Medical Center, New York, NY, 10032, USA
| | - Yun-Ju Tseng
- Edward S. Harkness Eye Institute, Department of Ophthalmology, Columbia University Irving Medical Center, New York, NY, 10032, USA
| | - Laura A Jenny
- Edward S. Harkness Eye Institute, Department of Ophthalmology, Columbia University Irving Medical Center, New York, NY, 10032, USA
| | - Nicholas D Nolan
- Edward S. Harkness Eye Institute, Department of Ophthalmology, Columbia University Irving Medical Center, New York, NY, 10032, USA
- Department of Biomedical Engineering, The Fu Foundation School of Engineering and Applied Science, Columbia University, New York, NY, 10027, USA
| | - Nelson Chen
- Edward S. Harkness Eye Institute, Department of Ophthalmology, Columbia University Irving Medical Center, New York, NY, 10032, USA
- Faculty of Health Sciences, Queen's University, Kingston, ON, Canada
| | - Hung-Hsi Wang
- Edward S. Harkness Eye Institute, Department of Ophthalmology, Columbia University Irving Medical Center, New York, NY, 10032, USA
- College of Arts and Sciences, University of Miami, Coral Gables, FL, USA
| | - Chun Wei Hsu
- Edward S. Harkness Eye Institute, Department of Ophthalmology, Columbia University Irving Medical Center, New York, NY, 10032, USA
| | - Wan-Chun Huang
- Edward S. Harkness Eye Institute, Department of Ophthalmology, Columbia University Irving Medical Center, New York, NY, 10032, USA
| | - Janet R Sparrow
- Departments of Ophthalmology, Pathology and Cell Biology, Columbia University, New York, USA
| | - Chyuan-Sheng Lin
- Department of Pathology & Cell Biology, Columbia University Irving Medical Center, New York, NY, 10032, USA
- Herbert Irving Comprehensive Cancer Center, Columbia University Irving Medical Center, New York, NY, 10032, USA
| | - Stephen H Tsang
- Edward S. Harkness Eye Institute, Department of Ophthalmology, Columbia University Irving Medical Center, New York, NY, 10032, USA.
- Jonas Children's Vision Care, and Bernard and Shirlee Brown Glaucoma Laboratory, Columbia Stem Cell Initiative, Departments of Ophthalmology, Pathology and Cell Biology, Institute of Human Nutrition, Vagelos College of Physicians and Surgeons, Columbia University, New York, USA.
| |
Collapse
|
5
|
Chang YH, Kang EYC, Liu L, Jenny LA, Khang R, Seo GH, Lee H, Chen KJ, Wu WC, Hsiao MC, Wang NK. Maternal mosaicism in SSBP1 causing optic atrophy with retinal degeneration: implications for genetic counseling. Orphanet J Rare Dis 2023; 18:131. [PMID: 37259171 PMCID: PMC10233871 DOI: 10.1186/s13023-023-02748-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Accepted: 05/18/2023] [Indexed: 06/02/2023] Open
Abstract
BACKGROUND Optic atrophy-13 with retinal and foveal abnormalities (OPA13) (MIM #165510) is a mitochondrial disease in which apparent bilateral optic atrophy is present and sometimes followed by retinal pigmentary changes or photoreceptors degeneration. OPA13 is caused by heterozygous mutation in the SSBP1 gene, associated with variable mitochondrial dysfunctions. RESULTS We have previously reported a 16-year-old Taiwanese male diagnosed with OPA13 and SSBP1 variant c.320G>A (p.Arg107Gln) was identified by whole exon sequence (WES). This variant was assumed to be de novo since his parents were clinically unaffected. However, WES and Sanger sequencing further revealed the proband's unaffected mother carrying the same SSBP1 variant with a 13% variant allele frequency (VAF) in her peripheral blood. That finding strongly indicates the maternal gonosomal mosaicism contributing to OPA13, which has not been reported before. CONCLUSIONS In summary, we described the first case of OPA13 caused by maternal gonosomal mosaicism in SSBP1. Parental mosaicism could be a serious issue in OPA13 diagnosis, and appropriate genetic counseling should be considered.
Collapse
Affiliation(s)
- Yin-Hsi Chang
- Department of Ophthalmology, Chang Gung Memorial Hospital, Linkou Medical Center, Taoyuan, Taiwan
- College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Eugene Yu-Chuan Kang
- Department of Ophthalmology, Chang Gung Memorial Hospital, Linkou Medical Center, Taoyuan, Taiwan
- College of Medicine, Chang Gung University, Taoyuan, Taiwan
- Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Laura Liu
- Department of Ophthalmology, Chang Gung Memorial Hospital, Linkou Medical Center, Taoyuan, Taiwan
- College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Laura A Jenny
- Department of Ophthalmology, Edward S. Harkness Eye Institute, Columbia University Irving Medical Center, Columbia University, 635 West 165th Street, New York, NY, 10032, USA
| | - Rin Khang
- Division of Medical Genetics, 3Billion Inc., Seoul, South Korea
| | - Go Hun Seo
- Division of Medical Genetics, 3Billion Inc., Seoul, South Korea
| | - Hane Lee
- Division of Medical Genetics, 3Billion Inc., Seoul, South Korea
| | - Kuan-Jen Chen
- Department of Ophthalmology, Chang Gung Memorial Hospital, Linkou Medical Center, Taoyuan, Taiwan
- College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Wei-Chi Wu
- Department of Ophthalmology, Chang Gung Memorial Hospital, Linkou Medical Center, Taoyuan, Taiwan
- College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Meng-Chang Hsiao
- Department of Pathology and Cell Biology, Columbia University Medical Center, New York, NY, USA
| | - Nan-Kai Wang
- Department of Ophthalmology, Edward S. Harkness Eye Institute, Columbia University Irving Medical Center, Columbia University, 635 West 165th Street, New York, NY, 10032, USA.
| |
Collapse
|
6
|
Sanches ES, Boia R, Leitão RA, Madeira MH, Fontes-Ribeiro CA, Ambrósio AF, Fernandes R, Silva AP. Attention-Deficit/Hyperactivity Disorder Animal Model Presents Retinal Alterations and Methylphenidate Has a Differential Effect in ADHD versus Control Conditions. Antioxidants (Basel) 2023; 12:antiox12040937. [PMID: 37107312 PMCID: PMC10135983 DOI: 10.3390/antiox12040937] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 04/07/2023] [Accepted: 04/11/2023] [Indexed: 04/29/2023] Open
Abstract
Attention-Deficit/Hyperactivity Disorder (ADHD) is one of the most prevalent neurodevelopmental disorders. Interestingly, children with ADHD seem to experience more ophthalmologic abnormalities, and the impact of methylphenidate (MPH) use on retinal physiology remains unclear. Thus, we aimed to unravel the retina's structural, functional, and cellular alterations and the impact of MPH in ADHD versus the control conditions. For that, spontaneously hypertensive rats (SHR) and Wistar Kyoto rats (WKY) were used as animal models of ADHD and the controls, respectively. Animals were divided into four experimental groups as follows: WKY vehicle (Veh; tap water), WKY MPH (1.5 mg/kg/day), SHR Veh, SHR MPH. Individual administration was performed by gavage between P28-P55. Retinal physiology and structure were evaluated at P56 followed by tissue collection and analysis. The ADHD animal model presents the retinal structural, functional, and neuronal deficits, as well as the microglial reactivity, astrogliosis, blood-retinal barrier (BRB) hyperpermeability and a pro-inflammatory status. In this model, MPH had a beneficial effect on reducing microgliosis, BRB dysfunction, and inflammatory response, but did not correct the neuronal and functional alterations in the retina. Curiously, in the control animals, MPH showed an opposite effect since it impaired the retinal function, neuronal cells, and BRB integrity, and also promoted both microglia reactivity and upregulation of pro-inflammatory mediators. This study unveils the retinal alterations in ADHD and the opposite effects induced by MPH in the retina of ADHD and the control animal models.
Collapse
Affiliation(s)
- Eliane S Sanches
- Institute of Pharmacology and Experimental Therapeutics, Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal
- Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal
- Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, 3004-531 Coimbra, Portugal
| | - Raquel Boia
- Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal
- Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, 3004-531 Coimbra, Portugal
- Clinical Academic Center of Coimbra (CACC), 3004-561 Coimbra, Portugal
| | - Ricardo A Leitão
- Institute of Pharmacology and Experimental Therapeutics, Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal
- Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal
- Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, 3004-531 Coimbra, Portugal
| | - Maria H Madeira
- Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal
- Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, 3004-531 Coimbra, Portugal
| | - Carlos A Fontes-Ribeiro
- Institute of Pharmacology and Experimental Therapeutics, Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal
- Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal
- Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, 3004-531 Coimbra, Portugal
- Clinical Academic Center of Coimbra (CACC), 3004-561 Coimbra, Portugal
| | - António Francisco Ambrósio
- Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal
- Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, 3004-531 Coimbra, Portugal
- Clinical Academic Center of Coimbra (CACC), 3004-561 Coimbra, Portugal
- Association for Innovation and Biomedical Research on Light and Image (AIBILI), 3000-548 Coimbra, Portugal
| | - Rosa Fernandes
- Institute of Pharmacology and Experimental Therapeutics, Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal
- Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal
- Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, 3004-531 Coimbra, Portugal
- Clinical Academic Center of Coimbra (CACC), 3004-561 Coimbra, Portugal
- Association for Innovation and Biomedical Research on Light and Image (AIBILI), 3000-548 Coimbra, Portugal
| | - Ana Paula Silva
- Institute of Pharmacology and Experimental Therapeutics, Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal
- Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal
- Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, 3004-531 Coimbra, Portugal
- Clinical Academic Center of Coimbra (CACC), 3004-561 Coimbra, Portugal
| |
Collapse
|
7
|
Chang YH, Kang EYC, Liu L, Jenny LA, Khang R, Seo GH, Lee H, Chen KJ, Wu WC, Hsiao MC, Wang NK. Maternal Mosaicism in SSBP1 Causing Optic Atrophy with Retinal Degeneration: Implications for Genetic Counseling. RESEARCH SQUARE 2023:rs.3.rs-2554402. [PMID: 36993412 PMCID: PMC10055506 DOI: 10.21203/rs.3.rs-2554402/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 04/27/2023]
Abstract
Background: Optic atrophy-13 with retinal and foveal abnormalities (OPA13) (MIM #165510) is a mitochondrial disease in which apparent bilateral optic atrophy is present and sometimes followed by retinal pigmentary changes or photoreceptors degeneration. OPA13 is caused by heterozygous mutation in the SSBP1 gene, associated with variable mitochondrial dysfunctions. Results: We have previously reported a 16-year-old Taiwanese male diagnosed with OPA13 and SSBP1 variant c.320G>A (p.Arg107Gln) was identified by whole exon sequence (WES). This variant was assumed to be de novo since his parents were clinically unaffected. However, WES and Sanger sequencing further revealed the proband’s unaffected mother carrying the same SSBP1 variant with a 13% variant allele frequency (VAF) in her peripheral blood. That finding strongly indicates the maternal gonosomal mosaicism contributing to OPA13, which has not been reported before. Conclusions: In summary, we described the first case of OPA13 caused by maternal gonosomal mosaicism in SSBP1 . Parental mosaicism could be a serious issue in OPA13 diagnosis, and appropriate genetic counseling should be considered.
Collapse
Affiliation(s)
| | | | | | | | | | | | | | | | | | - Meng-Chang Hsiao
- Columbia University Medical Center: Columbia University Irving Medical Center
| | | |
Collapse
|
8
|
Clermont CV. Neuropathie optique héréditaire de Leber : tableau clinique et données du bilan initial. J Fr Ophtalmol 2022; 45:S3-S8. [DOI: 10.1016/s0181-5512(22)00444-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
|
9
|
Moos WH, Faller DV, Glavas IP, Harpp DN, Kamperi N, Kanara I, Kodukula K, Mavrakis AN, Pernokas J, Pernokas M, Pinkert CA, Powers WR, Sampani K, Steliou K, Tamvakopoulos C, Vavvas DG, Zamboni RJ, Chen X. Treatment and prevention of pathological mitochondrial dysfunction in retinal degeneration and in photoreceptor injury. Biochem Pharmacol 2022; 203:115168. [PMID: 35835206 DOI: 10.1016/j.bcp.2022.115168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2022] [Revised: 07/05/2022] [Accepted: 07/06/2022] [Indexed: 11/19/2022]
Abstract
Pathological deterioration of mitochondrial function is increasingly linked with multiple degenerative illnesses as a mediator of a wide range of neurologic and age-related chronic diseases, including those of genetic origin. Several of these diseases are rare, typically defined in the United States as an illness affecting fewer than 200,000 people in the U.S. population, or about one in 1600 individuals. Vision impairment due to mitochondrial dysfunction in the eye is a prominent feature evident in numerous primary mitochondrial diseases and is common to the pathophysiology of many of the familiar ophthalmic disorders, including age-related macular degeneration, diabetic retinopathy, glaucoma and retinopathy of prematurity - a collection of syndromes, diseases and disorders with significant unmet medical needs. Focusing on metabolic mitochondrial pathway mechanisms, including the possible roles of cuproptosis and ferroptosis in retinal mitochondrial dysfunction, we shed light on the potential of α-lipoyl-L-carnitine in treating eye diseases. α-Lipoyl-L-carnitine is a bioavailable mitochondria-targeting lipoic acid prodrug that has shown potential in protecting against retinal degeneration and photoreceptor cell loss in ophthalmic indications.
Collapse
Affiliation(s)
- Walter H Moos
- Department of Pharmaceutical Chemistry, School of Pharmacy, University of California San Francisco, San Francisco, CA, USA.
| | - Douglas V Faller
- Department of Medicine, Boston University School of Medicine, Boston, MA, USA; Cancer Research Center, Boston University School of Medicine, Boston, MA, USA
| | - Ioannis P Glavas
- Department of Ophthalmology, New York University School of Medicine, New York, NY, USA
| | - David N Harpp
- Department of Chemistry, McGill University, Montreal, QC, Canada
| | - Natalia Kamperi
- Center for Clinical, Experimental Surgery and Translational Research Pharmacology-Pharmacotechnology, Biomedical Research Foundation, Academy of Athens, Athens, Greece
| | | | | | - Anastasios N Mavrakis
- Department of Medicine, Tufts University School of Medicine, St. Elizabeth's Medical Center, Boston, MA, USA
| | - Julie Pernokas
- Advanced Dental Associates of New England, Woburn, MA, USA
| | - Mark Pernokas
- Advanced Dental Associates of New England, Woburn, MA, USA
| | - Carl A Pinkert
- Department of Pathobiology, College of Veterinary Medicine, Auburn University, Auburn, AL, USA
| | - Whitney R Powers
- Department of Health Sciences, Boston University, Boston, MA, USA; Department of Anatomy, Boston University School of Medicine, Boston, MA, USA
| | - Konstantina Sampani
- Beetham Eye Institute, Joslin Diabetes Center, Boston, MA, USA; Department of Medicine, Harvard Medical School, Boston, MA, USA.
| | - Kosta Steliou
- Cancer Research Center, Boston University School of Medicine, Boston, MA, USA; PhenoMatriX, Inc., Natick, MA, USA
| | - Constantin Tamvakopoulos
- Center for Clinical, Experimental Surgery and Translational Research Pharmacology-Pharmacotechnology, Biomedical Research Foundation, Academy of Athens, Athens, Greece
| | - Demetrios G Vavvas
- Department of Ophthalmology, Harvard Medical School, Boston, MA, USA; Retina Service, Angiogenesis Laboratory, Massachusetts Eye and Ear Infirmary, Boston, MA, USA
| | - Robert J Zamboni
- Department of Chemistry, McGill University, Montreal, QC, Canada
| | - Xiaohong Chen
- Department of Ophthalmology, Harvard Medical School, Boston, MA, USA; Retina Service, Angiogenesis Laboratory, Massachusetts Eye and Ear Infirmary, Boston, MA, USA; State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, China.
| |
Collapse
|