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Zhu X, Xu M, Portal C, Lin Y, Ferdinand A, Peng T, Morrisey EE, Dlugosz AA, Castellano JM, Lee V, Seykora JT, Iomini C, Millar SE. Identification of Meibomian gland stem cell populations and mechanisms of aging. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.08.09.607015. [PMID: 39149265 PMCID: PMC11326261 DOI: 10.1101/2024.08.09.607015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 08/17/2024]
Abstract
Meibomian glands secrete lipid-rich meibum, which prevents tear evaporation. Aging-related Meibomian gland shrinkage may result in part from stem cell exhaustion and is associated with evaporative dry eye disease, a common condition lacking effective treatment. The identities and niche of Meibomian gland stem cells and the signals controlling their activity are poorly defined. Using snRNA-seq, in vivo lineage tracing, ex vivo live imaging, and genetic studies in mice, we identified markers for stem cell populations that maintain distinct regions of the gland and uncovered Hh signaling as a key regulator of stem cell proliferation. Consistent with this, human Meibomian gland carcinoma exhibited increased Hh signaling. Aged glands displayed decreased Hh and EGF signaling, deficient innervation, and loss of collagen I in niche fibroblasts, indicating that alterations in both glandular epithelial cells and their surrounding microenvironment contribute to age-related degeneration. These findings suggest new approaches to treat aging-associated Meibomian gland loss.
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Affiliation(s)
- Xuming Zhu
- Black Family Stem Cell Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
- Institute for Regenerative Medicine, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
- Department of Cell, Developmental and Regenerative Biology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Mingang Xu
- Black Family Stem Cell Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
- Institute for Regenerative Medicine, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
- Department of Cell, Developmental and Regenerative Biology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Celine Portal
- Department of Ophthalmology, Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, MD, 21231, USA
- Department of Cell Biology, Johns Hopkins University School of Medicine, Baltimore, MD, 21231, USA
| | - Yvonne Lin
- Department of Ophthalmology, Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, MD, 21231, USA
- Department of Cell Biology, Johns Hopkins University School of Medicine, Baltimore, MD, 21231, USA
| | - Alyssa Ferdinand
- Black Family Stem Cell Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
- Institute for Regenerative Medicine, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
- Department of Cell, Developmental and Regenerative Biology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Tien Peng
- Department of Medicine, University of California San Francisco, San Francisco, CA 94143, USA
| | - Edward E. Morrisey
- Department of Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Andrzej A. Dlugosz
- Department of Dermatology and the Rogel Cancer Center, University of Michigan Medical School, Ann Arbor, MI 48109, USA
- Department of Cell and Developmental Biology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Joseph M. Castellano
- Black Family Stem Cell Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
- Institute for Regenerative Medicine, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
- Nash Family Department of Neuroscience, Department of Neurology, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
- Ronald M. Loeb Center for Alzheimer’s Disease, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Vivian Lee
- Department of Ophthalmology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA 19104, USA
- Department of Dermatology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA 19104, USA
| | - John T. Seykora
- Department of Dermatology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Carlo Iomini
- Department of Ophthalmology, Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, MD, 21231, USA
- Department of Cell Biology, Johns Hopkins University School of Medicine, Baltimore, MD, 21231, USA
| | - Sarah E Millar
- Black Family Stem Cell Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
- Institute for Regenerative Medicine, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
- Department of Cell, Developmental and Regenerative Biology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
- Department of Oncological Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
- Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
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Ebright B, Yu Z, Dave P, Dikeman D, Hamm-Alvarez S, de Paiva CS, Louie S. Effects of age on lacrimal gland bioactive lipids. Ocul Surf 2024; 33:64-73. [PMID: 38705236 DOI: 10.1016/j.jtos.2024.04.008] [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: 02/24/2024] [Revised: 04/26/2024] [Accepted: 04/30/2024] [Indexed: 05/07/2024]
Abstract
PURPOSE Polyunsaturated fatty acids (PUFA) are a source of bioactive lipids regulating inflammation and its resolution. METHODS Changes in PUFA metabolism were compared between lacrimal glands (LGs) from young and aged C57BL/6 J mice using a targeted lipidomics assay, as was the gene expression of enzymes involved in the metabolism of these lipids. RESULTS Global reduction in PUFAs and their metabolites was observed in aged LGs compared to young controls, averaging between 25 and 66 % across all analytes. ꞷ-6 arachidonic acid (AA) metabolites were all reduced in aged LGs, where the changes in prostaglandin E2 (PGE2) and lipoxin A4 (LXA4) were statistically significant. Several other 5-lipoxygenase (5-LOX) mediated metabolites were significantly reduced in the aged LGs, including D-series resolvins (e.g., RvD4, RvD5, and RvD6). Along with the RvDs, several ꞷ-3 docosahexaenoic acid (DHA) metabolites such as 14-HDHA, neuroprotectin D1 (NPD1), Maresin 2 (MaR2), and MaR 1 metabolite (22-COOH-MaR1) were significantly reduced in aged LGs. Similarly, ꞷ-3 eicosapentaenoic acid (EPA) and its metabolites were significantly reduced in aged LGs, where the most significantly reduced was 18-HEPE. Using metabolite ratios (product:precursor) for specific metabolic conversions as surrogate enzymatic measures, reduced 12-LOX activity was identified in aged LGs. CONCLUSION In this study, global reduction of PUFAs and their metabolites was found in the LGs of aged female C57BL/6 J compared to young controls. A consistent reduction was observed across all detected lipid analytes except for ꞷ-3 docosapentaenoic acid (DPA) and its special pro-resolving mediator (SPM) metabolites in aged mice, suggesting an increased risk for LG inflammation.
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Affiliation(s)
- Brandon Ebright
- Department of Clinical Pharmacy, Alfred Mann School of Pharmacy and Pharmaceutical Sciences, University of Southern California, Los Angeles, CA, United States, 90089-9121, USA.
| | - Zhiyuan Yu
- Department of Ophthalmology, Baylor College of Medicine, Houston, TX, USA.
| | - Priyal Dave
- Department of Clinical Pharmacy, Alfred Mann School of Pharmacy and Pharmaceutical Sciences, University of Southern California, Los Angeles, CA, United States, 90089-9121, USA.
| | - Dante Dikeman
- Department of Clinical Pharmacy, Alfred Mann School of Pharmacy and Pharmaceutical Sciences, University of Southern California, Los Angeles, CA, United States, 90089-9121, USA.
| | - Sarah Hamm-Alvarez
- Department of Ophthalmology, Baylor College of Medicine, Houston, TX, USA; Department of Pharmaceutical Sciences, Alfred Mann School of Pharmacy and Pharmaceutical Sciences, University of Southern California, Los Angeles, CA, USA; Department of Ophthalmology, Roski Eye Institute, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA.
| | - Cintia S de Paiva
- Department of Ophthalmology, Baylor College of Medicine, Houston, TX, USA.
| | - Stan Louie
- Department of Clinical Pharmacy, Alfred Mann School of Pharmacy and Pharmaceutical Sciences, University of Southern California, Los Angeles, CA, United States, 90089-9121, USA.
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Huang D, Jiao X, Huang S, Liu J, Si H, Qi D, Pei X, Lu D, Wang Y, Li Z. Analysis of the heterogeneity and complexity of murine extraorbital lacrimal gland via single-cell RNA sequencing. Ocul Surf 2024; 34:60-95. [PMID: 38945476 DOI: 10.1016/j.jtos.2024.06.005] [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: 08/26/2022] [Revised: 06/22/2024] [Accepted: 06/26/2024] [Indexed: 07/02/2024]
Abstract
PURPOSE The lacrimal gland is essential for maintaining ocular surface health and avoiding external damage by secreting an aqueous layer of the tear film. However, a healthy lacrimal gland's inventory of cell types and heterogeneity remains understudied. METHODS Here, 10X Genome-based single-cell RNA sequencing was used to generate an unbiased classification of cellular diversity in the extraorbital lacrimal gland (ELG) of C57BL/6J mice. From 43,850 high-quality cells, we produced an atlas of cell heterogeneity and defined cell types using classic marker genes. The possible functions of these cells were analyzed through bioinformatics analysis. Additionally, the CellChat was employed for a preliminary analysis of the cell-cell communication network in the ELG. RESULTS Over 37 subclasses of cells were identified, including seven types of glandular epithelial cells, three types of fibroblasts, ten types of myeloid-derived immune cells, at least eleven types of lymphoid-derived immune cells, and five types of vascular-associated cell subsets. The cell-cell communication network analysis revealed that fibroblasts and immune cells play a pivotal role in the dense intercellular communication network within the mouse ELG. CONCLUSIONS This study provides a comprehensive transcriptome atlas and related database of the mouse ELG.
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Affiliation(s)
- Duliurui Huang
- Department of Ophthalmology, Zhengzhou University People's Hospital, Henan Provincial People's Hospital, Zhengzhou, Henan, China
| | - Xinwei Jiao
- Henan Eye Institute, Henan Eye Hospital and Henan Key Laboratory of Ophthalmology and Visual Science, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, People's Hospital of Henan University, Zhengzhou, 450000, China
| | - Shenzhen Huang
- Henan Eye Institute, Henan Eye Hospital and Henan Key Laboratory of Ophthalmology and Visual Science, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, People's Hospital of Henan University, Zhengzhou, 450000, China
| | - Jiangman Liu
- Department of Ophthalmology, Zhengzhou University People's Hospital, Henan Provincial People's Hospital, Zhengzhou, Henan, China
| | - Hongli Si
- Department of Ophthalmology, Zhengzhou University People's Hospital, Henan Provincial People's Hospital, Zhengzhou, Henan, China
| | - Di Qi
- Henan Eye Institute, Henan Eye Hospital and Henan Key Laboratory of Ophthalmology and Visual Science, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, People's Hospital of Henan University, Zhengzhou, 450000, China
| | - Xiaoting Pei
- Henan Eye Institute, Henan Eye Hospital and Henan Key Laboratory of Ophthalmology and Visual Science, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, People's Hospital of Henan University, Zhengzhou, 450000, China
| | - Dingli Lu
- Henan Eye Institute, Henan Eye Hospital and Henan Key Laboratory of Ophthalmology and Visual Science, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, People's Hospital of Henan University, Zhengzhou, 450000, China
| | - Yimian Wang
- Division of Medicine, Faculty of Medical Sciences, University College London, Gower Street, London, WC1E 6BT, UK
| | - Zhijie Li
- Department of Ophthalmology, Zhengzhou University People's Hospital, Henan Provincial People's Hospital, Zhengzhou, Henan, China; Henan Eye Institute, Henan Eye Hospital and Henan Key Laboratory of Ophthalmology and Visual Science, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, People's Hospital of Henan University, Zhengzhou, 450000, China.
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Choi M, Toscano C, Edman MC, de Paiva CS, Hamm-Alvarez SF. The Aging Lacrimal Gland of Female C57BL/6J Mice Exhibits Multinucleate Macrophage Infiltration Associated With Lipid Dysregulation. Invest Ophthalmol Vis Sci 2024; 65:1. [PMID: 38829671 PMCID: PMC11156205 DOI: 10.1167/iovs.65.6.1] [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: 01/15/2024] [Accepted: 05/08/2024] [Indexed: 06/05/2024] Open
Abstract
Purpose Loss of function of the lacrimal gland (LG), which produces the aqueous tear film, is implicated in age-related dry eye. To better understand this deterioration, we evaluated changes in lipid metabolism and inflammation in LGs from an aging model. Methods LG sections from female C57BL/6J mice of different ages (young, 2-3 months; intermediate, 10-14 months; old, ≥24 months) were stained with Oil Red-O or Toluidine blue to detect lipids. Quantitative real-time polymerase chain reaction (qRT-PCR) analysis and western blotting of LG lysates determined differences in the expression of genes and proteins related to lipid metabolism. A photobleaching protocol to quench age-related autofluorescence was used in LG sections to evaluate changes in immunofluorescence associated with NPC1, NPC2, CTSL, and macrophages (F4/80, CD11b) with age using confocal fluorescence microscopy. Results Old LGs showed increased lipids prominent in basal aggregates in acinar cells and in extra-acinar sites. LG gene expression of Npc1, Npc2, Lipa, and Mcoln2, encoding proteins involved in lipid metabolism, was increased with age. NPC1 was also significantly increased in old LGs by western blotting. In photobleached LG sections, confocal fluorescence microscopy imaging of NPC1, NPC2, and CTSL immunofluorescence showed age-associated enrichment in macrophages labeled to detect F4/80. Although mononuclear macrophages were detectable in LG at all ages, this novel multinucleate macrophage population containing NPC1, NPC2, and CTSL and enriched in F4/80 and some CD11b was increased with age at extra-acinar sites. Conclusions Lipid-metabolizing proteins enriched in F4/80-positive multinucleated macrophages are increased in old LGs adjacent to sites of lipid deposition in acini.
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Affiliation(s)
- Minchang Choi
- Department of Pharmacology and Pharmaceutical Sciences, USC Alfred E. Mann School of Pharmacy, Los Angeles, California, United States
- Department of Ophthalmology, Roski Eye Institute, Keck School of Medicine of USC, Los Angeles, California, United States
| | - Cindy Toscano
- Department of Pharmacology and Pharmaceutical Sciences, USC Alfred E. Mann School of Pharmacy, Los Angeles, California, United States
- Department of Ophthalmology, Roski Eye Institute, Keck School of Medicine of USC, Los Angeles, California, United States
| | - Maria C. Edman
- Department of Ophthalmology, Roski Eye Institute, Keck School of Medicine of USC, Los Angeles, California, United States
- Department of Ophthalmology, Keck School of Medicine of USC, Los Angeles, California, United States
| | - Cintia S. de Paiva
- Ocular Surface Center, Cullen Eye Institute, Department of Ophthalmology, Baylor College of Medicine, Houston, Texas, United States
| | - Sarah F. Hamm-Alvarez
- Department of Pharmacology and Pharmaceutical Sciences, USC Alfred E. Mann School of Pharmacy, Los Angeles, California, United States
- Department of Ophthalmology, Roski Eye Institute, Keck School of Medicine of USC, Los Angeles, California, United States
- Department of Ophthalmology, Keck School of Medicine of USC, Los Angeles, California, United States
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Şingar E, Akbulut A, Koca G, Yazihan N, Atilgan Hİ, Yumuşak N, Demir A, Burcu A, Korkmaz M. The influencer effect of Dexmedetomidine on radioiodine relevant to lacrimal gland impairment. Int Ophthalmol 2024; 44:115. [PMID: 38411703 DOI: 10.1007/s10792-024-03052-6] [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: 05/11/2023] [Accepted: 02/16/2024] [Indexed: 02/28/2024]
Abstract
PURPOSE To assess the potential influencing effects of Dexmedetomidine on impaired lacrimal glands after high-dose radioiodine treatment (RAI). METHODS Thirty-six rats were arbitrarily separated into 3 groups: Sham, RAI, and Dexmedetomidine. Dexmedetomidine group was given Dexmedetomidine and RAI, the Sham group was given the same millimeters of saline, and the RAI group was given RAI only. All forms of lacrimal glands, including harderian glands (HG), extraorbital (EG), and intraorbital (IG) lacrimal glands, were evaluated for immunohistochemical, histopathologic assessments and also for tissue cytokines, oxidant and antioxidant levels. RESULTS Dexmedetomidine significantly ameliorated histopathologic changes such as periacinar fibrosis, acinar atrophy, lymphocytic infiltration, ductal proliferation, lipofuscin-like accumulation, and nucleus changes caused by RAI in all lacrimal gland forms (p < 0.05 for all of the parameters). However, periductal fibrosis was improved significantly only in EG (p = 0.049), and mast cell infiltration was improved significantly only in IG (p = 0.038) in Dexmedetomidine groups. There was a significant decrease in the elevated caspase-3 and TUNEL levels after RAI administration in the Dexmedetomidine group in all lacrimal gland forms (p < 0.05 for all parameters). Dexmedetomidine attenuated NF-kb, TNF-α, and IL-6 levels significantly diminished total oxidant status and raised total antioxidant status levels (p < 0.05 for all parameters). CONCLUSIONS The results of this study demonstrated that following RAI, Dexmedetomidine diminished inflammation, tissue cytokine levels, and apoptosis and ameliorated impaired histopathologic patterns of the lacrimal glands.
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Affiliation(s)
- Evin Şingar
- Department of Ophthalmology, University of Health Sciences, Ankara Training and Research Hospital, Ankara, Turkey.
| | - Aylin Akbulut
- Department of Nuclear Medicine, University of Health Sciences, Ankara Training and Research Hospital, Ankara, Turkey
| | - Gökhan Koca
- Department of Nuclear Medicine, University of Health Sciences, Ankara Training and Research Hospital, Ankara, Turkey
| | - Nuray Yazihan
- Department of Physiopathology, Ankara University, Ankara, Turkey
| | - Hasan İkbal Atilgan
- Department of Nuclear Medicine, Hatay Mustafa Kemal University, Hatay, Turkey
| | - Nihat Yumuşak
- Veterinary Faculty, Department of Pathology, Harran University, Sanliurfa, Turkey
| | - Ayten Demir
- Faculty of Nursing, Ankara University, Ankara, Turkey
| | - Ayse Burcu
- Department of Ophthalmology, University of Health Sciences, Ankara Training and Research Hospital, Ankara, Turkey
| | - Meliha Korkmaz
- Department of Nuclear Medicine, University of Health Sciences, Ankara Training and Research Hospital, Ankara, Turkey
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Bai Y, Zhang K, Cao X, Chen P. Aquaporins in lacrimal glands and their role in dry eye disease. Exp Eye Res 2023; 236:109676. [PMID: 37827442 DOI: 10.1016/j.exer.2023.109676] [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: 12/14/2022] [Revised: 10/05/2023] [Accepted: 10/09/2023] [Indexed: 10/14/2023]
Abstract
Aging is the most important known risk factor for dry eye is aging, which is associated with changes in the structure and function of the lacrimal gland (LG) and characterized by atrophy, duct blocking lymphocyte infiltration, and reduced protein secretion. Aquaporins (AQP) have been proposed as a potential producer of exocrine gland fluids since exocrine secretion depends on the mobility of water. Therefore, the main topics of this review will be the expression, localization, and function of AQPs in LG. In addition, we review the mechanisms of fluid transport in exocrine gland fluid secretion and discuss the potential role of AQPs in dry eye.
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Affiliation(s)
- Ying Bai
- Department of Human Anatomy, Histology and Embryology, School of Basic Medicine, Qingdao University, Qingdao, 266071, Shandong Province, China
| | - Kaier Zhang
- Department of Human Anatomy, Histology and Embryology, School of Basic Medicine, Qingdao University, Qingdao, 266071, Shandong Province, China
| | - Xin Cao
- Department of Human Anatomy, Histology and Embryology, School of Basic Medicine, Qingdao University, Qingdao, 266071, Shandong Province, China
| | - Peng Chen
- Department of Human Anatomy, Histology and Embryology, School of Basic Medicine, Qingdao University, Qingdao, 266071, Shandong Province, China; Clinical Laboratory, Qingdao Central Hospital, The Second Affiliated Hospital of Medical College of Qingdao University, Qingdao, 266042, Shandong Province, China.
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Liu J, Si H, Huang D, Lu D, Zou S, Qi D, Pei X, Huang S, Li Z. Mechanisms of Extraorbital Lacrimal Gland Aging in Mice: An Integrative Analysis of the Temporal Transcriptome. Invest Ophthalmol Vis Sci 2023; 64:18. [PMID: 37695604 PMCID: PMC10501490 DOI: 10.1167/iovs.64.12.18] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Accepted: 08/16/2023] [Indexed: 09/12/2023] Open
Abstract
Purpose This study used high-throughput RNA sequencing (RNA-Seq) and bioinformatics analysis to investigate the altered transcriptome profile of aging lacrimal glands in mice that occurs over the course of a 24-hour cycle. Methods Male C57BL/6J mice aged 12 weeks (young) and 20 months (aging) were housed in a pathogen-free setting with a 12-hour light/12-hour dark cycle. Throughout a 24-hour cycle, mouse extraorbital lacrimal glands (ELGs) were collected at eight time points at three-hour intervals. To prepare for the high-throughput RNA-Seq, whole mRNA was extracted. Differentially expressed genes (DEGs) in the young and aging groups were subjected to bioinformatic analysis based on diurnal patterns. Furthermore, the cell populations in which significant DEGs express and signaling pathways occur were validated at the single-cell RNA sequencing (scRNA-seq) level. Results The total transcriptome composition was significantly altered in aging ELGs compared with that in young mouse ELGs at eight time points during the 24-hour cycle, with 864 upregulated and 228 downregulated DEGs, which were primarily enriched in inflammatory pathways. Further comparative analysis of the point-to-point transcriptome revealed that aging ELGs underwent alterations in the temporal transcriptome profile in several pathways, including the inflammation-related, metabolism-related, mitochondrial bioenergetic function-associated, synaptome neural activity-associated, cell processes-associated, DNA processing-associated and fibrosis-associated pathways. Most of these pathways occurred separately in distinct cell populations. Conclusions Transcriptome profiles of aging lacrimal glands undergo considerable diurnal time-dependent changes; this finding offers a comprehensive source of information to better understand the pathophysiology of lacrimal gland aging and its underlying mechanisms.
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Affiliation(s)
- Jiangman Liu
- Department of Ophthalmology, Zhengzhou University People's Hospital, Henan Provincial People's Hospital, Zhengzhou, Henan, China
| | - Hongli Si
- Department of Ophthalmology, Zhengzhou University People's Hospital, Henan Provincial People's Hospital, Zhengzhou, Henan, China
| | - Duliurui Huang
- Department of Ophthalmology, Zhengzhou University People's Hospital, Henan Provincial People's Hospital, Zhengzhou, Henan, China
| | - Dingli Lu
- Henan Eye Institute, Henan Eye Hospital, and Henan Key Laboratory of Ophthalmology and Visual Science, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, People's Hospital of Henan University, Zhengzhou, China
| | - Sen Zou
- Henan Eye Institute, Henan Eye Hospital, and Henan Key Laboratory of Ophthalmology and Visual Science, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, People's Hospital of Henan University, Zhengzhou, China
| | - Di Qi
- Henan Eye Institute, Henan Eye Hospital, and Henan Key Laboratory of Ophthalmology and Visual Science, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, People's Hospital of Henan University, Zhengzhou, China
| | - Xiaoting Pei
- Henan Eye Institute, Henan Eye Hospital, and Henan Key Laboratory of Ophthalmology and Visual Science, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, People's Hospital of Henan University, Zhengzhou, China
| | - Shenzhen Huang
- Henan Eye Institute, Henan Eye Hospital, and Henan Key Laboratory of Ophthalmology and Visual Science, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, People's Hospital of Henan University, Zhengzhou, China
| | - Zhijie Li
- Henan Eye Institute, Henan Eye Hospital, and Henan Key Laboratory of Ophthalmology and Visual Science, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, People's Hospital of Henan University, Zhengzhou, China
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Bai Y, Di G, Ge H, Li B, Zhang K, Zhang D, Wang D, Chen P. Regulation of Axon Guidance by Slit2 and Netrin-1 Signaling in the Lacrimal Gland of Aqp5 Knockout Mice. Invest Ophthalmol Vis Sci 2023; 64:27. [PMID: 37707834 PMCID: PMC10506685 DOI: 10.1167/iovs.64.12.27] [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: 06/22/2023] [Accepted: 08/23/2023] [Indexed: 09/15/2023] Open
Abstract
Purpose Dry eye disease (DED) is multifactorial and associated with nerve abnormalities. We explored an Aquaporin 5 (AQP5)-deficiency-induced JunB activation mechanism, which causes abnormal lacrimal gland (LG) nerve distribution through Slit2 upregulation and Netrin-1 repression. Methods Aqp5 knockout (Aqp5-/-) and wild-type (Aqp5+/+) mice were studied. LGs were permeabilized and stained with neuronal class III β-tubulin, tyrosine hydroxylase (TH), vasoactive intestinal peptide (VIP), and calcitonin gene-related peptide (CGRP). Whole-mount images were acquired through tissue clearing and 3D fluorescence imaging. Mouse primary trigeminal ganglion (TG) neurons were treated with LG extracts and Netrin-1/Slit2 neutralizing antibody. Transcription factor (TF) prediction and chromatin immunoprecipitation-polymerase chain reaction (ChIP-PCR) experiments verified the JunB binding and regulatory effect on Netrin-1 and Slit2. Results Three-dimensional tissue and section immunofluorescence showed reduced LG nerves in Aqp5-/- mice, with sympathetic and sensory nerves significantly decreased. Netrin-1 was reduced and Slit2 increased in Aqp5-/- mice LGs. Aqp5+/+ mice LG tissue extracts (TEs) promoted Aqp5-/- TG neurons axon growth, but Netrin-1 neutralizing antibody (NAb) could inhibit that promotion. Aqp5-/- mice LG TEs inhibited Aqp5+/+ TG axon growth, but Slit2 NAb alleviated that inhibition. Furthermore, JunB, a Netrin-1 and Slit2 TF, could bind them and regulate their expression. SR11302, meanwhile, reversed the Netrin-1 and Slit2 shifts caused by AQP5 deficiency. Conclusions AQP5 deficiency causes LG nerve abnormalities. Persistent JunB activation, the common denominator for Netrin-1 suppression and Slit2 induction, was found in Aqp5-/- mice LG epithelial cells. This affected sensory and sympathetic nerve fibers' distribution in LGs. Our findings provide insights into preventing, reversing, and treating DED.
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Affiliation(s)
- Ying Bai
- Department of Human Anatomy, Histology and Embryology, School of Basic Medicine, Qingdao University, Qingdao, China
| | - Guohu Di
- Department of Human Anatomy, Histology and Embryology, School of Basic Medicine, Qingdao University, Qingdao, China
- Institute of Stem Cell Regeneration Medicine, School of Basic Medicine, Qingdao University, Qingdao, China
| | - Huanhuan Ge
- Department of Human Anatomy, Histology and Embryology, School of Basic Medicine, Qingdao University, Qingdao, China
| | - Bin Li
- Department of Human Anatomy, Histology and Embryology, School of Basic Medicine, Qingdao University, Qingdao, China
| | - Kaier Zhang
- Department of Human Anatomy, Histology and Embryology, School of Basic Medicine, Qingdao University, Qingdao, China
| | - Di Zhang
- Department of Human Anatomy, Histology and Embryology, School of Basic Medicine, Qingdao University, Qingdao, China
| | - Dianqiang Wang
- Department of Ophthalmology, Qingdao Aier Eye Hospital, Qingdao, China
| | - Peng Chen
- Department of Human Anatomy, Histology and Embryology, School of Basic Medicine, Qingdao University, Qingdao, China
- Institute of Stem Cell Regeneration Medicine, School of Basic Medicine, Qingdao University, Qingdao, China
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Galletti JG, Scholand KK, Trujillo-Vargas CM, Haap W, Santos-Ferreira T, Ullmer C, Yu Z, de Paiva CS. Effects of Cathepsin S Inhibition in the Age-Related Dry Eye Phenotype. Invest Ophthalmol Vis Sci 2023; 64:7. [PMID: 37540176 PMCID: PMC10414132 DOI: 10.1167/iovs.64.11.7] [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: 06/11/2023] [Accepted: 07/12/2023] [Indexed: 08/05/2023] Open
Abstract
Purpose Aged C57BL/6J (B6) mice have increased levels of cathepsin S, and aged cathepsin S (Ctss-/-) knockout mice are resistant to age-related dry eye. This study investigated the effects of cathepsin S inhibition on age-related dry eye disease. Methods Female B6 mice aged 15.5 to 17 months were randomized to receive a medicated diet formulated by mixing the RO5461111 cathepsin S inhibitor or a standard diet for at least 12 weeks. Cornea mechanosensitivity was measured with a Cochet-Bonnet esthesiometer. Ocular draining lymph nodes and lacrimal glands (LGs) were excised and prepared for histology or assayed by flow cytometry to quantify infiltrating immune cells. The inflammatory foci (>50 cells) were counted under a 10× microscope lens and quantified using the focus score. Goblet cell density was investigated in periodic acid-Schiff stained sections. Ctss-/- mice were compared to age-matched wild-type mice. Results Aged mice subjected to cathepsin S inhibition or Ctss-/- mice showed improved conjunctival goblet cell density and cornea mechanosensitivity. There was no change in total LG focus score in the diet or Ctss-/- mice, but there was a lower frequency of CD4+IFN-γ+ cell infiltration in the LGs. Furthermore, aged Ctss-/- LGs had an increase in T central memory, higher numbers of CD19+B220-, and fewer CD19+B220+ cells than wild-type LGs. Conclusions Our results indicate that therapies aimed at decreasing cathepsin S can ameliorate age-related dry eye disease with a highly beneficial impact on the ocular surface. Further studies are needed to investigate the role of cathepsin S during aging.
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Affiliation(s)
- Jeremias G. Galletti
- Department of Ophthalmology, Baylor College of Medicine, Houston, Texas, United States
- Institute of Experimental Medicine, Buenos Aires, Argentina
| | - Kaitlin K. Scholand
- Department of Ophthalmology, Baylor College of Medicine, Houston, Texas, United States
- Department of Biosciences, Rice University, Houston, Texas, United States
| | - Claudia M. Trujillo-Vargas
- Department of Ophthalmology, Baylor College of Medicine, Houston, Texas, United States
- Grupo de Inmunodeficiencias Primarias, Facultad de Medicina, Universidad de Antioquia, UdeA, Medellín, Colombia
| | - Wolfgang Haap
- Roche Pharma Research and Early Development, F. Hoffmann-La Roche Ltd, Basel, Switzerland
| | - Tiago Santos-Ferreira
- Roche Pharma Research and Early Development, F. Hoffmann-La Roche Ltd, Basel, Switzerland
| | - Christoph Ullmer
- Roche Pharma Research and Early Development, F. Hoffmann-La Roche Ltd, Basel, Switzerland
| | - Zhiyuan Yu
- Department of Ophthalmology, Baylor College of Medicine, Houston, Texas, United States
| | - Cintia S. de Paiva
- Department of Ophthalmology, Baylor College of Medicine, Houston, Texas, United States
- Department of Biosciences, Rice University, Houston, Texas, United States
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10
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Zhao M, Yu Y, Ying GS, Asbell PA, Bunya VY. Age Associations with Dry Eye Clinical Signs and Symptoms in the Dry Eye Assessment and Management (DREAM) Study. OPHTHALMOLOGY SCIENCE 2023; 3:100270. [PMID: 36846104 PMCID: PMC9950493 DOI: 10.1016/j.xops.2023.100270] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 01/03/2023] [Accepted: 01/05/2023] [Indexed: 01/13/2023]
Abstract
Purpose To evaluate how increasing age is associated with dry eye disease (DED) signs and symptoms in the Dry Eye Assessment and Management (DREAM) study. This study was undertaken to better understand how DED signs and symptoms differ across decades of life with goals to help assess detection and treatment of DED. Design Secondary analysis of the DREAM study. Subjects One hundred twenty, 140, 185, and 90 participants aged < 50, 50 to 59, 60 to 69, and ≥ 70 years, respectively. Methods We performed a secondary analysis of data from the DREAM study, a multicenter randomized clinical trial, to evaluate the effect of omega-3 fatty acid supplementation for the treatment of DED. At baseline, 6 months, and 12 months follow-up, participants underwent an assessment of DED symptoms and signs using Ocular Surface Disease Index, Brief Pain Inventory, tear break-up time (TBUT) (in seconds), Schirmer test with anesthesia (mm/5 minutes), conjunctival staining, corneal staining, meibomian gland dysfunction evaluation, and tear osmolarity (mOsm/l). Multivariable generalized linear regression models were used to compare DED symptoms and signs across the 4 age groups among all participants and by sex. Main Outcome Measures Scores of DED symptoms, individual signs, and composite scores of DED signs. Results Among 535 patients with DED, increasing age was significantly associated with worse TBUT (P = 0.01), corneal staining (P < 0.001), a composite severity score of DED signs (P = 0.007), and tear osmolarity (P = 0.001). Similar significant differences were found across 4 age groups of 334 women in TBUT, corneal staining score, composite severity score of DED signs, and tear osmolarity (all P < 0.05) but not in men. Conclusion We found that corneal staining, TBUT, tear osmolarity, and a composite severity score of DED signs were significantly more severe with increasing age in women but not in men; worsening symptoms did not increase with increasing age. Financial Disclosures The author(s) have no proprietary or commercial interest in any materials discussed in this article.
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Affiliation(s)
- Megan Zhao
- Scheie Eye Institute, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania
- Hamilton Eye Institute, University of Tennessee Health Science Center, Memphis, Tennessee
| | - Yinxi Yu
- Scheie Eye Institute, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania
- Hamilton Eye Institute, University of Tennessee Health Science Center, Memphis, Tennessee
| | - Gui-shuang Ying
- Scheie Eye Institute, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania
- Hamilton Eye Institute, University of Tennessee Health Science Center, Memphis, Tennessee
| | - Penny A. Asbell
- Scheie Eye Institute, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania
- Hamilton Eye Institute, University of Tennessee Health Science Center, Memphis, Tennessee
| | - Vatinee Y. Bunya
- Correspondence: Vatinee Y. Bunya, MD, MSCE, Scheie Eye Institute, 51 N 39th St, Philadelphia, PA 19104.
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11
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Galletti JG, Scholand KK, Trujillo-Vargas CM, Yu Z, Mauduit O, Delcroix V, Makarenkova HP, de Paiva CS. Ectopic lymphoid structures in the aged lacrimal glands. Clin Immunol 2023; 248:109251. [PMID: 36740002 PMCID: PMC10323865 DOI: 10.1016/j.clim.2023.109251] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 01/22/2023] [Accepted: 01/24/2023] [Indexed: 02/05/2023]
Abstract
Aging is a complex biological process in which many organs are pathologically affected. We previously reported that aged C57BL/6J had increased lacrimal gland (LG) lymphoid infiltrates that suggest ectopic lymphoid structures. However, these ectopic lymphoid structures have not been fully investigated. Using C57BL/6J mice of different ages, we analyzed the transcriptome of aged murine LGs and characterized the B and T cell populations. Age-related changes in the LG include increased differentially expressed genes associated with B and T cell activation, germinal center formation, and infiltration by marginal zone-like B cells. We also identified an age-related increase in B1+ cells and CD19+B220+ cells. B220+CD19+ cells were GL7+ (germinal center-like) and marginal zone-like and progressively increased with age. There was an upregulation of transcripts related to T follicular helper cells, and the number of these cells also increased as mice aged. Compared to a mouse model of Sjögren syndrome, aged LGs have similar transcriptome responses but also unique ones. And lastly, the ectopic lymphoid structures in aged LGs are not exclusive to a specific mouse background as aged diverse outbred mice also have immune infiltration. Altogether, this study identifies a profound change in the immune landscape of aged LGs where B cells become predominant. Further studies are necessary to investigate the specific function of these B cells during the aged LGs.
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Affiliation(s)
- Jeremias G Galletti
- Ocular Surface Center, Department of Ophthalmology, Cullen Eye Institute, Baylor College of Medicine, Houston, TX, USA; Institute of Experimental Medicine (CONICET), National Academy of Medicine of Buenos Aires, Buenos Aires, Argentina
| | - Kaitlin K Scholand
- Ocular Surface Center, Department of Ophthalmology, Cullen Eye Institute, Baylor College of Medicine, Houston, TX, USA; Biochemistry and Cell Biology Graduate Program, Department of BioSciences, Rice University, Houston, TX, USA.
| | - Claudia M Trujillo-Vargas
- Ocular Surface Center, Department of Ophthalmology, Cullen Eye Institute, Baylor College of Medicine, Houston, TX, USA; Grupo de Inmunodeficiencias Primarias, Facultad de Medicina, Universidad de Antioquia, UdeA, Medellín, Colombia.
| | - Zhiyuan Yu
- Ocular Surface Center, Department of Ophthalmology, Cullen Eye Institute, Baylor College of Medicine, Houston, TX, USA.
| | - Olivier Mauduit
- Department of Molecular Medicine, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA.
| | - Vanessa Delcroix
- Department of Molecular Medicine, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA.
| | - Helen P Makarenkova
- Department of Molecular Medicine, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA.
| | - Cintia S de Paiva
- Ocular Surface Center, Department of Ophthalmology, Cullen Eye Institute, Baylor College of Medicine, Houston, TX, USA.
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12
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Elbasiony E, Cho WJ, Singh A, Mittal SK, Zoukhri D, Chauhan SK. Increased activity of lacrimal gland mast cells are associated with corneal epitheliopathy in aged mice. NPJ AGING 2023; 9:2. [PMID: 36849524 PMCID: PMC9971332 DOI: 10.1038/s41514-023-00099-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Accepted: 02/13/2023] [Indexed: 03/01/2023]
Abstract
The lacrimal gland undergoes significant structural and functional deterioration with aging. Marked with increased inflammation and fibrosis, the aged lacrimal gland is unable to perform its protective function. As a result, the ocular surface becomes highly susceptible to various ocular surface pathologies, including corneal epitheliopathy. We and others have previously shown that mast cells mediate tissue inflammation by recruiting other immune cells. However, despite their well-known characteristics of secreting various inflammatory mediators, whether mast cells contribute to the immune cell aggregation and activation, and acinar dystrophy of the aged lacrimal gland has not been investigated. Here, we demonstrate the role of mast cells in age-related lacrimal gland pathophysiology using mast cell-deficient (cKitw-sh) mice. Our data demonstrated a significant increase in mast cell frequencies and immune cell infiltration in the lacrimal gland of aged mice. Interestingly, mast cell deficiency resulted in a substantial reduction in inflammation and preservation of lacrimal gland structure, suggesting that mast cells mediate the aging process of the lacrimal gland.
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Affiliation(s)
- Elsayed Elbasiony
- Schepens Eye Research Institute of Mass Eye and Ear, Harvard Medical School, Boston, MA, USA
| | - WonKyung J Cho
- Schepens Eye Research Institute of Mass Eye and Ear, Harvard Medical School, Boston, MA, USA
| | - Aastha Singh
- Schepens Eye Research Institute of Mass Eye and Ear, Harvard Medical School, Boston, MA, USA
| | - Sharad K Mittal
- Schepens Eye Research Institute of Mass Eye and Ear, Harvard Medical School, Boston, MA, USA
| | - Driss Zoukhri
- Department of Ophthalmology, Tufts University School of Medicine, Boston, MA, USA
- Department of Comprehensive Care, Tufts University School of Dental Medicine, Boston, MA, USA
| | - Sunil K Chauhan
- Schepens Eye Research Institute of Mass Eye and Ear, Harvard Medical School, Boston, MA, USA.
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13
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Atilgan HI, Akbulut A, Yazihan N, Yumusak N, Singar E, Koca G, Korkmaz M. The Cytokines-Directed Roles of Spirulina for Radioprotection of Lacrimal Gland. Ocul Immunol Inflamm 2023; 31:271-276. [PMID: 35050831 DOI: 10.1080/09273948.2022.2026409] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
PURPOSE To evaluate the radioprotective effect of spirulina (SP) on the lacrimal glands after RAI treatment. METHODS A total of 30 rats were separated into control, RAI and SP group. The radioprotective effect of SP on lacrimal glands was evaluated with histopathological and cytopathological analysis. Lacrimal glands were analyzed for tumor necrosis factor alpha (TNF-α), interleukin-2 (IL-2), IL-4, IL-6, IL-10, nuclear factor-kappa B (NF-κB), total oxidant status (TOS) and total antioxidant capacity (TAC) levels. RESULTS RAI increased TNF-α (p = .001), IL-6 (p = .018), and NF-κB levels (p < .0005). Following the administration of SP, TNF-α (p < .0005), IL-4 (p = .026), and IL-6 (p = .006) levels decreased. RAI decreased the TAC levels (p = .001), and co-administration of SP increased the TAC level, but was not statistically significant. SP decreased the TOS level after RAI (p = .022) . CONCLUSIONS SP protects lacrimal glands from RAI-induced damage.
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Affiliation(s)
- H I Atilgan
- Faculty of Medicine, Department of Nuclear Medicine, Hatay Mustafa Kemal University, Hatay, Turkey
| | - A Akbulut
- Ankara Training and Research Hospital, Department of Nuclear Medicine, University of Health Sciences, Ankara, Turkey
| | - N Yazihan
- Faculty of Medicine, Department of Pathophysiology, Ankara University, Ankara, Turkey
| | - N Yumusak
- Faculty of Veterinary Medicine, Department of Pathology, Harran University, Sanliurfa, Turkey
| | - E Singar
- Ankara Training and Research Hospital, Department of Ophthalmology, University of Health Sciences, Ankara, Turkey
| | - G Koca
- Ankara Training and Research Hospital, Department of Nuclear Medicine, University of Health Sciences, Ankara, Turkey
| | - M Korkmaz
- Ankara Training and Research Hospital, Department of Nuclear Medicine, University of Health Sciences, Ankara, Turkey
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14
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Feldt J, Garriz A, Rodriguez Benavente MC, Woodward AM, Zoukhri D, Argüeso P. The Matricellular Protein SPARC Decreases in the Lacrimal Gland At Adulthood and During Inflammation. Invest Ophthalmol Vis Sci 2022; 63:8. [PMID: 36479944 PMCID: PMC9742964 DOI: 10.1167/iovs.63.13.8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Purpose Secreted protein acidic and rich in cysteine (SPARC) is a matricellular glycoprotein abundantly expressed in basement membranes and capsules surrounding a variety of organs and tissues. It mediates extracellular matrix organization and has been implicated in cell contraction. Here, we evaluated the expression of SPARC in the murine lacrimal gland at adulthood and during inflammation. Methods Lacrimal glands of young mice (4-6 weeks old) and adult mice (32-40 weeks old) were used for extraction of DNA, RNA, and protein. The presence of SPARC was assessed by quantitative PCR, ELISA, and immunofluorescence microscopy. 5-Methylcytosine and DNA methylation were evaluated using ELISA and bisulfite genomic sequencing, respectively. The effects of cytokines and inflammation in Sparc expression were evaluated in vitro and in the non-obese diabetic (NOD) mouse model of Sjögren's syndrome. Results The mRNA and protein levels of SPARC were downregulated in lacrimal glands of mature adult mice presenting age-related histological alterations such as increased deposition of lipofuscin and lipids. Epigenetic analyses indicated that glands in adult mice contain higher levels of global DNA methylation and show increased hypermethylation of specific CpG sites within the Sparc gene promoter. Analysis of smooth muscle actin (SMA)-green fluorescent protein (GFP) transgenic mice revealed that SPARC localizes primarily to myoepithelial cells within the gland. Treatment of myoepithelial cells with IL-1β or TNF-α and the development of inflammation in the NOD mice led to decreased transcription of Sparc. Conclusions SPARC is a novel matricellular glycoprotein expressed by myoepithelial cells in the lacrimal gland. Loss of SPARC during adulthood and chronic inflammation might have detrimental consequences on myoepithelial cell contraction and the secretion of tear fluid.
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Affiliation(s)
- Jessica Feldt
- Schepens Eye Research Institute, Mass. Eye and Ear, Department of Ophthalmology, Harvard Medical School, Boston, Massachusetts, United States
| | - Angela Garriz
- Department of Comprehensive Care, Tufts University School of Dental Medicine, Boston, Massachusetts, United States
| | - Maria C. Rodriguez Benavente
- Schepens Eye Research Institute, Mass. Eye and Ear, Department of Ophthalmology, Harvard Medical School, Boston, Massachusetts, United States
| | - Ashley M. Woodward
- Schepens Eye Research Institute, Mass. Eye and Ear, Department of Ophthalmology, Harvard Medical School, Boston, Massachusetts, United States
| | - Driss Zoukhri
- Department of Comprehensive Care, Tufts University School of Dental Medicine, Boston, Massachusetts, United States,Department of Ophthalmology, Tufts University School of Medicine, Boston, Massachusetts, United States
| | - Pablo Argüeso
- Schepens Eye Research Institute, Mass. Eye and Ear, Department of Ophthalmology, Harvard Medical School, Boston, Massachusetts, United States
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15
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Wood JPM, Chidlow G, Halliday LA, Casson RJ, Selva D, Sun M. Histochemical Comparison of Human and Rat Lacrimal Glands: Implications for Bio-Engineering Studies. Transl Vis Sci Technol 2022; 11:10. [PMID: 36374486 PMCID: PMC9669807 DOI: 10.1167/tvst.11.11.10] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Purpose The purpose of this study was to determine whether rodent lacrimal glands (LGs) represent a suitable surrogate for human tissue in bio-engineering research, we undertook a meticulous histological and histochemical comparison of these two tissues. Methods Histological techniques and immunohistochemistry were used to compare the structure of adult human and rat LG tissues and the expression of key functional tissue elements. Results Compared with humans, the rat LG is comprised of much more densely packed acini which are devoid of an obvious central lumen. Myoepithelial, fibroblasts, dendritic cells, T cells, and putative progenitor cells are present in both tissues. However, human LG is replete with epithelium expressing cytokeratins 8 and 18, whereas rat LG epithelium does not express cytokeratin 8. Furthermore, human LG expresses aquaporins (AQPs) 1, 3, and 5, whereas rat LG expresses AQPs 1, 4, and 5. Additionally, mast cells were identified in the rat but not the human LGs and large numbers of plasma cells were detected in the human LGs but only limited numbers were present in the rat LGs. Conclusions The cellular composition of the human and rat LGs is similar, although there is a marked difference in the actual histo-architectural arrangement of the tissue. Further variances in the epithelial cytokeratin profile, in tissue expression of AQPs and in mast cell and plasma cell infiltration, may prove significant. Translational Relevance The rat LG can serve as a useful surrogate for the human equivalent, but there exist specific tissue differences meaning that caution must be observed when translating results to patients.
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Affiliation(s)
- John P. M. Wood
- Discipline of Ophthalmology & Visual Sciences, University of Adelaide, Adelaide South Australia, Australia
- South Australian Institute of Ophthalmology, Royal Adelaide Hospital, South Australia, Australia
| | - Glyn Chidlow
- Discipline of Ophthalmology & Visual Sciences, University of Adelaide, Adelaide South Australia, Australia
- South Australian Institute of Ophthalmology, Royal Adelaide Hospital, South Australia, Australia
| | - Luke A. Halliday
- Discipline of Ophthalmology & Visual Sciences, University of Adelaide, Adelaide South Australia, Australia
- South Australian Institute of Ophthalmology, Royal Adelaide Hospital, South Australia, Australia
| | - Robert J. Casson
- Discipline of Ophthalmology & Visual Sciences, University of Adelaide, Adelaide South Australia, Australia
- South Australian Institute of Ophthalmology, Royal Adelaide Hospital, South Australia, Australia
| | - Dinesh Selva
- Discipline of Ophthalmology & Visual Sciences, University of Adelaide, Adelaide South Australia, Australia
- South Australian Institute of Ophthalmology, Royal Adelaide Hospital, South Australia, Australia
| | - Michelle Sun
- Discipline of Ophthalmology & Visual Sciences, University of Adelaide, Adelaide South Australia, Australia
- South Australian Institute of Ophthalmology, Royal Adelaide Hospital, South Australia, Australia
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Kitazawa K, Inotmata T, Shih K, Hughes JWB, Bozza N, Tomioka Y, Numa K, Yokoi N, Campisi J, Dana R, Sotozono C. Impact of aging on the pathophysiology of dry eye disease: A systematic review and meta-analysis. Ocul Surf 2022; 25:108-118. [PMID: 35753664 DOI: 10.1016/j.jtos.2022.06.004] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Revised: 06/16/2022] [Accepted: 06/20/2022] [Indexed: 12/01/2022]
Abstract
PURPOSE Dry eye disease (DED) is a common age-related ocular surface disease. However, it is unknown how aging influences the ocular surface microenvironment. This systematic review aims to investigate how the aging process changes the ocular surface microenvironment and impacts the development of DED. METHODS An article search was performed in PubMed, EMBASE, and Web of Science. 44 studies reporting on age-related ocular changes and 14 large epidemiological studies involving the prevalence of DED were identified. 8 out of 14 epidemiological studies were further analyzed with meta-analysis. The Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) reporting guidelines were followed. Study-specific estimates (impact of aging on the prevalence of DED) were combined using one-group meta-analysis in a random-effects model. RESULTS Meta-analysis revealed the prevalence of DED in the elderly aged 60 years old or older was 5519 of 60107 (9.2%) and the odds ratio of aging compared to younger age was 1.313 (95% confidence interval [CI]; 1.107, 1.557). With increasing age, the integrity of the ocular surface and tear film stability decreased. Various inflammatory cells, including senescent-associated T-cells, infiltrated the ocular surface epithelium, lacrimal gland, and meibomian gland, accompanied by senescence-related changes, including accumulation of 8-OHdG and lipofuscin-like inclusions, increased expression of p53 and apoptosis-related genes, and decreased Ki67 positive cells. CONCLUSIONS The aging process greatly impacts the ocular surface microenvironment, consequently leading to DED.
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Affiliation(s)
- Koji Kitazawa
- Buck Institute for Research on Aging, Novato, CA, 94945, USA; Kyoto Prefectural University of Medicine, Department of Ophthalmology, Kyoto, Japan.
| | - Takenori Inotmata
- Juntendo University Graduate School of Medicine, Department of Ophthalmology, Tokyo, Japan; Juntendo University Graduate School of Medicine, Department of Hospital Administration, Tokyo, Japan; Juntendo University Graduate School of Medicine, Department of Digital Medicine, Tokyo, Japan
| | - Kendric Shih
- Li Ka Shing Faculty of Medicine, The University of Hong Kong (HKUMed), Department of Ophthalmology, Hong Kong, China
| | | | - Niha Bozza
- Buck Institute for Research on Aging, Novato, CA, 94945, USA
| | - Yasufumi Tomioka
- Kyoto Prefectural University of Medicine, Department of Ophthalmology, Kyoto, Japan
| | - Kohsaku Numa
- Buck Institute for Research on Aging, Novato, CA, 94945, USA; Kyoto Prefectural University of Medicine, Department of Ophthalmology, Kyoto, Japan
| | - Norihiko Yokoi
- Kyoto Prefectural University of Medicine, Department of Ophthalmology, Kyoto, Japan
| | - Judith Campisi
- Buck Institute for Research on Aging, Novato, CA, 94945, USA; Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Reza Dana
- Massachusetts Eye and Ear Infirmary, Department of Ophthalmology, Harvard Medical School, Boston, MA, 02114, USA
| | - Chie Sotozono
- Kyoto Prefectural University of Medicine, Department of Ophthalmology, Kyoto, Japan
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Lemos CN, da Silva LECM, Faustino JF, Fantucci MZ, Murashima ADAB, Adriano L, Alves M, Rocha EM. Oxidative Stress in the Protection and Injury of the Lacrimal Gland and the Ocular Surface: are There Perspectives for Therapeutics? Front Cell Dev Biol 2022; 10:824726. [PMID: 35359431 PMCID: PMC8963457 DOI: 10.3389/fcell.2022.824726] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Accepted: 02/16/2022] [Indexed: 12/24/2022] Open
Abstract
Oxidative stress (OS) is a major disruption in the physiology of the lacrimal functional unit (LFU). Antioxidant enzymes have dual protective activities: antioxidant and antimicrobial activities. Peroxidases have been indistinctly used as markers of the secretory activity of the LFU and implicated in the pathophysiology, diagnosis and treatment of dry eye disease (DED), even though they comprise a large family of enzymes that includes lactoperoxidase (LPO) and glutathione peroxidase (GPO), among others. Assays to measure and correlate OS with other local LFU phenomena have methodological limitations. Studies implicate molecules and reactions involved in OS as markers of homeostasis, and other studies identify them as part of the physiopathology of diseases. Despite these conflicting concepts and observations, it is clear that OS is influential in the development of DED. Moreover, many antioxidant strategies have been proposed for its treatment, including calorie restriction to nutritional supplementation. This review offers a critical analysis of the biological mechanisms, diagnostic outcomes, drug use, dietary supplements, and life habits that implicate the influence of OS on DED.
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Affiliation(s)
- Camila Nunes Lemos
- Department of Ophthalmology, Otorhinolaryngology and Head and Neck Surgery, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Brazil
- *Correspondence: Camila Nunes Lemos,
| | - Lilian Eslaine Costa Mendes da Silva
- Department of Ophthalmology, Otorhinolaryngology and Head and Neck Surgery, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Brazil
| | - Jacqueline Ferreira Faustino
- Department of Ophthalmology, Otorhinolaryngology and Head and Neck Surgery, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Brazil
| | - Marina Zilio Fantucci
- Department of Ophthalmology, Otorhinolaryngology and Head and Neck Surgery, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Brazil
| | - Adriana de Andrade Batista Murashima
- Department of Ophthalmology, Otorhinolaryngology and Head and Neck Surgery, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Brazil
| | - Leidiane Adriano
- Department of Ophthalmology, Otorhinolaryngology and Head and Neck Surgery, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Brazil
| | - Monica Alves
- Department of Ophthalmology and Otorhinolaryngology, Faculty of Medical Sciences, State University of Campinas (Unicamp), Campinas, Brazil
| | - Eduardo Melani Rocha
- Department of Ophthalmology, Otorhinolaryngology and Head and Neck Surgery, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Brazil
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Di Zazzo A, Coassin M, Surico PL, Bonini S. Age-related ocular surface failure: A narrative review. Exp Eye Res 2022; 219:109035. [DOI: 10.1016/j.exer.2022.109035] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Revised: 02/28/2022] [Accepted: 03/13/2022] [Indexed: 12/26/2022]
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Martínez-Alberquilla I, Gasull X, Pérez-Luna P, Seco-Mera R, Ruiz-Alcocer J, Crooke A. Neutrophils and neutrophil extracellular trap components: Emerging biomarkers and therapeutic targets for age-related eye diseases. Ageing Res Rev 2022; 74:101553. [PMID: 34971794 DOI: 10.1016/j.arr.2021.101553] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 11/17/2021] [Accepted: 12/23/2021] [Indexed: 12/14/2022]
Abstract
Age-related eye diseases, including dry eye, glaucoma, age-related macular degeneration, and diabetic retinopathy, represent a major global health issue based on their increasing prevalence and disabling action. Unraveling the molecular mechanisms underlying these diseases will provide novel opportunities to reduce the burden of age-related eye diseases and improve eye health, contributing to sustainable development goals achievement. The impairment of neutrophil extracellular traps formation/degradation processes seems to be one of these mechanisms. These traps formed by a meshwork of DNA and neutrophil cytosolic granule proteins may exacerbate the inflammatory response promoting chronic inflammation, a pivotal cause of age-related diseases. In this review, we describe current findings that suggest the role of neutrophils and their traps in the pathogenesis of the above-mentioned age-related eye diseases. Furthermore, we discuss why these cells and their constituents could be biomarkers and therapeutic targets for dry eye, glaucoma, age-related macular degeneration, and diabetic retinopathy. We also examine the therapeutic potential of some neutrophil function modulators and provide several recommendations for future research in age-related eye diseases.
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Affiliation(s)
- Irene Martínez-Alberquilla
- Department of Optometry and Vision, Faculty of Optics and Optometry, Universidad Complutense de Madrid, Madrid, Spain; Clinical and Experimental Eye Research Group, UCM 971009, Faculty of Optics and Optometry, Universidad Complutense de Madrid, Madrid, Spain
| | - Xavier Gasull
- Neurophysiology Laboratory, Department of Biomedicine, Medical School, Institute of Neurosciences, Universitat de Barcelona, Barcelona, Spain; Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
| | - Patricia Pérez-Luna
- Department of Biochemistry and Molecular Biology, Faculty of Optics and Optometry, Universidad Complutense de Madrid, Madrid, Spain
| | - Rubén Seco-Mera
- Department of Biochemistry and Molecular Biology, Faculty of Optics and Optometry, Universidad Complutense de Madrid, Madrid, Spain
| | - Javier Ruiz-Alcocer
- Department of Optometry and Vision, Faculty of Optics and Optometry, Universidad Complutense de Madrid, Madrid, Spain; Clinical and Experimental Eye Research Group, UCM 971009, Faculty of Optics and Optometry, Universidad Complutense de Madrid, Madrid, Spain
| | - Almudena Crooke
- Department of Biochemistry and Molecular Biology, Faculty of Optics and Optometry, Universidad Complutense de Madrid, Madrid, Spain; Clinical and Experimental Eye Research Group, UCM 971009, Faculty of Optics and Optometry, Universidad Complutense de Madrid, Madrid, Spain.
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20
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Phenylephrine increases tear cathepsin S secretion in healthy murine lacrimal gland acinar cells through an alternative secretory pathway. Exp Eye Res 2021; 211:108760. [PMID: 34487726 DOI: 10.1016/j.exer.2021.108760] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Revised: 08/02/2021] [Accepted: 09/02/2021] [Indexed: 12/13/2022]
Abstract
Little is known about the relationship between stimulation of lacrimal gland (LG) tear protein secretion by parasympathetic versus sympathetic nerves, particularly whether the spectrum of tear proteins evoked through each innervation pathway varies. We have previously shown that activity and abundance of cathepsin S (CTSS), a cysteine protease, is greatly increased in tears of Sjögren's syndrome (SS) patients and in tears from the male NOD mouse of autoimmune dacryoadenitis that recapitulates SS-associated dry eye disease. Beyond the increased synthesis of CTSS detected in the diseased NOD mouse LG, increased tear CTSS secretion in NOD mouse tears was recently linked to increased exocytosis from a novel endolysosomal secretory pathway. Here, we have compared secretion and trafficking of CTSS in healthy mouse LG acinar cells stimulated with either the parasympathetic acetylcholine receptor agonist, carbachol (CCh), or the sympathetic α1-adrenergic agonist, phenylephrine (PE). In situ secretion studies show that PE significantly increases CTSS activity and protein in tears relative to CCh stimulation by 1.2-fold (***, p = 0.0009) and ∼5-fold (*, p-0.0319), respectively. A similar significant increase in CTSS activity with PE relative to CCh is observed when cultured LGAC are stimulated in vitro. CCh stimulation significantly elevates intracellular [Ca2+], an effect associated with increases in the size of Rab3D-enriched vesicles consistent with compound fusion, and subsequently decreases in their intensity of labeling consistent with their exocytosis. PE stimulation induces a lower [Ca2+] response and has minimal effects on Rab3D-enriched SV diameter or the intensity of Rab3D-enriched SV labeling. LG deficient in Rab3D exhibit a higher sensitivity to PE stimulation, and secrete more CTSS activity. Significant increases in the colocalization of endolysosomal vesicle markers (Lamp1, Lamp2, Rab7) with the subapical actin suggestive of fusion of endolysosomal vesicles at the apical membrane occur both with CCh and PE stimulation, but PE demonstrates increased colocalization. In conclusion, the α1-adrenergic agonist, PE, increases CTSS secretion into tears through a pathway independent of the exocytosis of Rab3D-enriched mature SV, possibly representing an alternative endolysosomal secretory pathway.
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Jiao X, Pei X, Lu D, Qi D, Huang S, He S, Li Z. Microbial Reconstitution Improves Aging-Driven Lacrimal Gland Circadian Dysfunction. THE AMERICAN JOURNAL OF PATHOLOGY 2021; 191:2091-2116. [PMID: 34428426 DOI: 10.1016/j.ajpath.2021.08.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Revised: 07/22/2021] [Accepted: 08/03/2021] [Indexed: 12/20/2022]
Abstract
Lacrimal glands are highly susceptible to aging and exhibit age-related structural and functional alterations. However, the mechanisms by which aging affects the lacrimal glands are not well-established. The current study explores the crosstalk between the aging process, gut microbiota, and circadian rhythm in age-associated lacrimal gland dysfunction. C57BL/6J mice were divided into young, old, and fecal microbiota transplant (FMT)-treated old groups. The gut bacterial community diversity was analyzed by 16S rRNA sequencing. Exorbital lacrimal glands (ELGs) were collected at 3-hour intervals over a 24-hour circadian cycle, and total RNA was subjected to high-throughput sequencing. Rhythmic transcriptional data were analyzed using the Jonckheere-Terpstra-Kendall algorithm and bioinformatics analysis technology. Immunostaining was used to identify lymphocytic infiltration, lipid deposition, and nerve innervation in the ELGs. Compared with young mice, old mice underwent a significant gut microbial community shift. The rhythmically transcriptomic profile was significantly reprogrammed over a 24-hour cycle in the old ELG group. Intervention with serial FMT from young donors for 1 month rejuvinated the gut microbial community of the old mice. Most alterations in rhythmic transcriptomic profiling were improved. Furthermore, chronic inflammation, lipid deposition, and aberrant neural response of the aging lacrimal glands were significantly reduced. Thus, the study shows that reconstitution of age-associated gut dysbiosis with FMTs from young donors improves aging-driven lacrimal gland circadian dysfunction.
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Affiliation(s)
- Xinwei Jiao
- Henan Eye Institute, Henan Eye Hospital, and Henan Key Laboratory of Ophthalmology and Visual Science, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, People's Hospital of Henan University, Zhengzhou, China
| | - Xiaoting Pei
- Henan Eye Institute, Henan Eye Hospital, and Henan Key Laboratory of Ophthalmology and Visual Science, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, People's Hospital of Henan University, Zhengzhou, China
| | - Dingli Lu
- Henan Eye Institute, Henan Eye Hospital, and Henan Key Laboratory of Ophthalmology and Visual Science, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, People's Hospital of Henan University, Zhengzhou, China
| | - Di Qi
- Henan Eye Institute, Henan Eye Hospital, and Henan Key Laboratory of Ophthalmology and Visual Science, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, People's Hospital of Henan University, Zhengzhou, China
| | - Shenzhen Huang
- Henan Eye Institute, Henan Eye Hospital, and Henan Key Laboratory of Ophthalmology and Visual Science, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, People's Hospital of Henan University, Zhengzhou, China
| | - Siyu He
- Henan Eye Institute, Henan Eye Hospital, and Henan Key Laboratory of Ophthalmology and Visual Science, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, People's Hospital of Henan University, Zhengzhou, China
| | - Zhijie Li
- Henan Eye Institute, Henan Eye Hospital, and Henan Key Laboratory of Ophthalmology and Visual Science, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, People's Hospital of Henan University, Zhengzhou, China.
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Ji YW, Kang HG, Song JS, Jun JW, Han K, Kim TI, Seo KY, Lee HK. The Dopaminergic Neuronal System Regulates the Inflammatory Status of Mouse Lacrimal Glands in Dry Eye Disease. Invest Ophthalmol Vis Sci 2021; 62:14. [PMID: 33844826 PMCID: PMC8039574 DOI: 10.1167/iovs.62.4.14] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Purpose Comparison of the parasympathetic and sympathetic neurons, including the dopaminergic neural system, in dry eye (DE)–induced pathophysiology has not been elucidated well. This study investigated the presence of dopamine receptors (DRs) and their functional roles in the lacrimal glands (LGs) of DE-induced mice. Methods After DE was induced in B6 mice for 2 weeks, the expression of tyrosine hydroxylase (TH), dopamine, and DRs (DR1, DR2, etc.) in the LGs and corneas were measured by quantitative RT-PCR, immunoblot, and ELISA. Using flow cytometry and ELISA, immune cell infiltration and inflammatory cytokine expression were determined in DE-induced LGs with or without DR blockers, SCH-23390 (DR1i), or melperone (DR2i). Corneal erosion scores were also investigated. Results The mRNA and protein levels of TH significantly increased in DE-induced LGs. The dopamine concentration of LGs was 9.51 pmol in DE (versus naive: 1.39 pmol; P < 0.001). Both DR1 and DR2 mRNA expression were significantly enhanced in desiccating stress compared with those in naive (3.7- and 2.1-fold, P < 0.001). Interestingly, DR1 and DR2 immunostaining patterns stained independently in DE-induced LGs. CD3+ and CD19+ cell infiltration was significantly increased by DR2i (P < 0.001) but not by DR1i. Furthermore, IFN-γ, IL-17, and TNF-α were significantly upregulated by DR2i compared with the blow-only condition. The severity of corneal erosion and inflammation was also aggravated by DR2i. Conclusions Upregulation of DR1 and DR2 was observed in DE-induced mouse LGs. As the inflammatory conditions are aggravated by the inhibition of DRs, especially DR2, their activity may be an important factor preserving ocular surface homeostasis.
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Affiliation(s)
- Yong Woo Ji
- Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Korea.,Department of Ophthalmology, Yongin Severance Hospital, Yonsei University College of Medicine, Yongin, Korea
| | - Hyun Goo Kang
- Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Korea
| | - Jong Suk Song
- Department of Ophthalmology, Korea University College of Medicine, Seoul, Korea
| | - Ji Won Jun
- Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Korea
| | - Kyusun Han
- Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Korea
| | - Tae-Im Kim
- Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Korea
| | - Kyoung Yul Seo
- Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Korea
| | - Hyung Keun Lee
- Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Korea.,College of Pharmacy, Yonsei University, Incheon, Korea
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Galletti JG, de Paiva CS. The ocular surface immune system through the eyes of aging. Ocul Surf 2021; 20:139-162. [PMID: 33621658 PMCID: PMC8113112 DOI: 10.1016/j.jtos.2021.02.007] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 02/04/2021] [Accepted: 02/16/2021] [Indexed: 02/06/2023]
Abstract
Since the last century, advances in healthcare, housing, and education have led to an increase in life expectancy. Longevity is accompanied by a higher prevalence of age-related diseases, such as cancer, autoimmunity, diabetes, and infection, and part of this increase in disease incidence relates to the significant changes that aging brings about in the immune system. The eye is not spared by aging either, presenting with age-related disorders of its own, and interestingly, many of these diseases have immune pathophysiology. Being delicate organs that must be exposed to the environment in order to capture light, the eyes are endowed with a mucosal environment that protects them, the so-called ocular surface. As in other mucosal sites, immune responses at the ocular surface need to be swift and potent to eliminate threats but are at the same time tightly controlled to prevent excessive inflammation and bystander damage. This review will detail how aging affects the mucosal immune response of the ocular surface as a whole and how this process relates to the higher incidence of ocular surface disease in the elderly.
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Affiliation(s)
- Jeremias G Galletti
- Innate Immunity Laboratory, Institute of Experimental Medicine (IMEX), CONICET-National Academy of Medicine, Buenos Aires, Argentina.
| | - Cintia S de Paiva
- Ocular Surface Center, Cullen Eye Institute, Department of Ophthalmology, Baylor College of Medicine, Houston, TX, 77030, USA.
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24
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Fu R, Edman MC, Hamm-Alvarez SF. Rab27a Contributes to Cathepsin S Secretion in Lacrimal Gland Acinar Cells. Int J Mol Sci 2021; 22:1630. [PMID: 33562815 PMCID: PMC7914720 DOI: 10.3390/ijms22041630] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Revised: 01/30/2021] [Accepted: 02/02/2021] [Indexed: 02/06/2023] Open
Abstract
Altered lacrimal gland (LG) secretion is a feature of autoimmune dacryoadenitis in Sjögren's syndrome (SS). Cathepsin S (CTSS) is increased in tears of SS patients, which may contribute to disease. Rab3D and Rab27a/b isoforms are effectors of exocytosis in LG, but Rab27a is poorly studied. To investigate whether Rab27a mediates CTSS secretion, we utilized quantitative confocal fluorescence microscopy of LG from SS-model male NOD and control male BALB/c mice, showing that Rab27a-enriched vesicles containing CTSS were increased in NOD mouse LG. Live-cell imaging of cultured lacrimal gland acinar cells (LGAC) transduced with adenovirus encoding wild-type (WT) mCFP-Rab27a revealed carbachol-stimulated fusion and depletion of mCFP-Rab27a-enriched vesicles. LGAC transduced with dominant-negative (DN) mCFP-Rab27a exhibited significantly reduced carbachol-stimulated CTSS secretion by 0.5-fold and β-hexosaminidase by 0.3-fold, relative to stimulated LGAC transduced with WT mCFP-Rab27a. Colocalization of Rab27a and endolysosomal markers (Rab7, Lamp2) with the apical membrane was increased in both stimulated BALB/c and NOD mouse LG, but the extent of colocalization was much greater in NOD mouse LG. Following stimulation, Rab27a colocalization with endolysosomal membranes was decreased. In conclusion, Rab27a participates in CTSS secretion in LGAC though the major regulated pathway, and through a novel endolysosomal pathway that is increased in SS.
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Affiliation(s)
- Runzhong Fu
- Department of Pharmacology and Pharmaceutical Sciences, School of Pharmacy, University of Southern California, Los Angeles, CA 90033, USA;
- Department of Ophthalmology, Roski Eye Institute, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA;
| | - Maria C. Edman
- Department of Ophthalmology, Roski Eye Institute, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA;
| | - Sarah F. Hamm-Alvarez
- Department of Pharmacology and Pharmaceutical Sciences, School of Pharmacy, University of Southern California, Los Angeles, CA 90033, USA;
- Department of Ophthalmology, Roski Eye Institute, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA;
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25
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Šemanjski K, Majdič G, Kozina V, Ježek D. Sexual dimorphism of the extraorbital lacrimal glands in SF-1 knockout mice. Acta Histochem 2021; 123:151669. [PMID: 33360489 DOI: 10.1016/j.acthis.2020.151669] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Revised: 12/04/2020] [Accepted: 12/07/2020] [Indexed: 01/15/2023]
Abstract
Sexual dimorphism (SD) represents all the differences between males and females of the same species. SD of the murine lacrimal gland and the major effect of testosterone on its formation are well documented. Steroidogenic factor-1 (SF-1, NR5a1) is a nuclear receptor essential for the fetal development of steroid hormones producing organs and SF-1 knockout mice (Sf-1 KO) are therefore born without gonads and adrenal glands. The aim of this study was to investigate whether SD in lacrimal glands is present in the absence of exposure to sex hormones during development. Lacrimal glands from adult Sf-1 KO male and female mice without hormonal exposure, and from males that were treated with testosterone propionate (TP) prior to sacrifice, were examined. After sacrifice, glandular tissue was processed using standard histological procedures. Paraffin sections were analysed by stereology and immunostained against the androgen receptor (AR). Our results showed that there were no statistically significant differences in the mean volumes of acini, connective tissue or ductal system between males, females, and males on TP. The same pertains to the mean length of the ducts in all three groups. In the absence of sex hormones, sex chromosomes proved to be insufficient in inducing sexual dimorphism in LG. However, nuclei of the acinar cells in males on TP were positive for AR, whereas in males without TP no expression of AR was detected. Administration of TP induced the expression of AR in the nuclei of acinar cells of males but did not affect the morphology of LG. We conclude that SD in the lacrimal gland is not present in Sf-1 KO mice and this suggests that sex hormones have a major role in the development of SD in the lacrimal gland.
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Affiliation(s)
- Kristina Šemanjski
- Clinical Hospital "Sveti Duh", Zagreb, Department of Surgery, Sveti Duh 64, 10000, Zagreb, Croatia.
| | - Gregor Majdič
- University of Ljubljana, Veterinary Faculty, Centre for Animal Genomics, Croatia
| | - Viviana Kozina
- University of Zagreb, School of Medicine, Department of Histology and Embryology, Croatia
| | - Davor Ježek
- University of Zagreb, School of Medicine, Department of Histology and Embryology, Croatia
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26
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Koca G, Singar E, Akbulut A, Yazihan N, Yumuşak N, Demir A, Korkmaz M. The Effect of Resveratrol on Radioiodine Therapy-Associated Lacrimal Gland Damage. Curr Eye Res 2020; 46:398-407. [PMID: 32730712 DOI: 10.1080/02713683.2020.1803920] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
PURPOSE We have evaluated the potential radioprotective, antioxidant and anti-apoptotic effects of resveratrol (RSV) against high-dose radioactive iodine (RAI) therapy associated damage of the lacrimal glands by biochemical, histopathological and immunohistochemical methods. MATERIALS AND METHODS Thirty Wistar-albino rats were randomly divided into three groups; the control group received no treatment or medication, the RAI group received RAI but no medication and the RSV group received oral RAI and intraperitoneal RSV. RSV was started at day one, before RAI administration, and continued for 8 days. Bilateral intraorbital (IG), extraorbital (EG), and Harderian (HG) lacrimal glands were evaluated in all rats for histopathological, immunohistochemical, tissue cytokine and oxidant and antioxidant level assessment. RESULTS RSV group restored inflammation, fibrosis, vacuolization, change in nucleus characteristics, lipofuscin-like accumulation and cellular morphologic patterns were statistically significant in all lacrimal gland types, compared to the RAI group (p < .05 for all variables). Similarly, elevated Caspase-3 and TUNEL levels in the RAI group were significantly alleviated in the RSV group in all lacrimal gland types (p < .05 for all variables). RAI administration significantly elevated TNF-α, IL-6, NF-кb levels, and decreased IL-10 levels (p < .05 for all parameters) whereas TOS levels significantly increased and TAS levels were significantly decreased. However, RSV significantly diminished TNF-α, IL-6, IL-4, and NF-кb levels. Furthermore, RSV significantly decreased TOS and increased TAS levels (p < .05 for all variables). CONCLUSIONS We conclude that with its anti-cancer effect as well as its antioxidant effect RSV has protected the histopathological pattern of the lacrimal glands from the damage, decreased inflammation in histopathologic assessments, and decreased tissue cytokine levels, apoptosis and DNA fragmentation on the lacrimal glands after RAI.
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Affiliation(s)
- Gökhan Koca
- Department of Nuclear Medicine, Ankara Training and Application Hospital, University of Health Sciences , Ankara, Turkey
| | - Evin Singar
- Department of Ophthalmology, Ankara Training and Application Hospital, University of Health Sciences , Ankara, Turkey
| | - Aylin Akbulut
- Department of Nuclear Medicine, Ankara Training and Application Hospital, University of Health Sciences , Ankara, Turkey
| | - Nuray Yazihan
- Department of Pathophysiology, Ankara University School of Medicine , Ankara, Turkey
| | - Nihat Yumuşak
- Department of Pathology, Harran University Faculty of Veterinary Medicine , Sanliurfa, Turkey
| | - Ayten Demir
- Faculty of Health Sciences, Nursing Department, Ankara University , Ankara, Turkey
| | - Meliha Korkmaz
- Department of Nuclear Medicine, Ankara Training and Application Hospital, University of Health Sciences , Ankara, Turkey
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Jiao X, Lu D, Pei X, Qi D, Huang S, Song Z, Gu J, Li Z. Type 1 diabetes mellitus impairs diurnal oscillations in murine extraorbital lacrimal glands. Ocul Surf 2020; 18:438-452. [PMID: 32360784 DOI: 10.1016/j.jtos.2020.04.013] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Revised: 04/20/2020] [Accepted: 04/23/2020] [Indexed: 01/09/2023]
Abstract
PURPOSE People with diabetes are at high risk of lacrimal gland dysfunction, but the underlying mechanism is not well understood. In this study, we determined how type 1 diabetes mellitus (T1DM) influences circadian homeostasis of the murine extraorbital lacrimal glands (ELGs). METHODS A T1DM animal model was established by systemic streptozotocin injection in C57BL/6J mice. After 5 weeks, ELGs were collected at 3-h intervals over a 24-h circadian cycle. Total extracted RNA was subjected to high-throughput RNA sequencing, and rhythmic transcriptional data were evaluated using the Jonckheere-Terpstra-Kendall algorithm, Kyoto Encyclopedia of Genes and Genomes pathway analysis, Phase Set Enrichment Analysis, and time series cluster analysis to determine the phase, rhythmicity, and unique signature of the transcripts over temporally coordinated expression. Additionally, mass, cell size, histology, and tear secretion of the ELGs were evaluated. RESULTS T1DM globally altered the composition of the ELG transcriptome. Specifically, T1DM significantly reprogrammed the circadian transcriptomic profiles of normal ELGs and reorganized core clock machinery. Unique temporal and clustering enrichment pathways were also rewired by T1DM. Finally, normal daily rhythms of mass, cell size, and tear secretion of mouse ELGs were significantly impaired by streptozotocin-induced diabetes. CONCLUSIONS T1DM significantly reprograms the diurnal oscillations of the lacrimal glands and impairs their structure and tear secretion. This information may reveal potential targets for improving lacrimal gland dysfunction in patients with diabetes.
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Affiliation(s)
- Xinwei Jiao
- Henan Eye Institute, Henan Eye Hospital and Henan Key Laboratory of Ophthalmology and Visual Science, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, People's Hospital of Henan University, Zhengzhou, China
| | - Dingli Lu
- Henan Eye Institute, Henan Eye Hospital and Henan Key Laboratory of Ophthalmology and Visual Science, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, People's Hospital of Henan University, Zhengzhou, China
| | - Xiaoting Pei
- Henan Eye Institute, Henan Eye Hospital and Henan Key Laboratory of Ophthalmology and Visual Science, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, People's Hospital of Henan University, Zhengzhou, China
| | - Di Qi
- Henan Eye Institute, Henan Eye Hospital and Henan Key Laboratory of Ophthalmology and Visual Science, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, People's Hospital of Henan University, Zhengzhou, China
| | - Shenzhen Huang
- Henan Eye Institute, Henan Eye Hospital and Henan Key Laboratory of Ophthalmology and Visual Science, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, People's Hospital of Henan University, Zhengzhou, China
| | - Zongming Song
- Henan Eye Institute, Henan Eye Hospital and Henan Key Laboratory of Ophthalmology and Visual Science, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, People's Hospital of Henan University, Zhengzhou, China
| | - Jianqin Gu
- Henan Eye Institute, Henan Eye Hospital and Henan Key Laboratory of Ophthalmology and Visual Science, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, People's Hospital of Henan University, Zhengzhou, China
| | - Zhijie Li
- Henan Eye Institute, Henan Eye Hospital and Henan Key Laboratory of Ophthalmology and Visual Science, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, People's Hospital of Henan University, Zhengzhou, China.
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28
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De Silva MEH, Hill LJ, Downie LE, Chinnery HR. The Effects of Aging on Corneal and Ocular Surface Homeostasis in Mice. Invest Ophthalmol Vis Sci 2019; 60:2705-2715. [PMID: 31242280 DOI: 10.1167/iovs.19-26631] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Purpose Aging is a risk factor for dry eye disease. The aim of this study was to investigate if aging is associated with a range of signs of dry eye disease, including tear hyperosmolarity, reduced nerve density, and increased dendritic cell number, in mice. Method Healthy C57BL/6 female mice, aged 2 months (young, n = 10) and 22 months (aged, n = 11) were used. Clinical assessments included corneal sensitivity (Cochet-Bonnet esthesiometry), tear secretion (Phenol red thread test), tear film osmolarity (TearLab osmometer), and corneal thickness (optical coherence tomography). The sum length of the corneal superficial terminals and sub-basal nerves, density of vertical nerve projections, and density and tree area of resident epithelial dendritic cells, were assessed using immunofluorescence and confocal microscopy. Results Aged mice had significantly higher tear secretion, lower corneal sensitivity, and a thicker corneal stroma but thinner epithelium. There was no significant intergroup difference for tear osmolarity. Aged mice showed a significantly lower sum length of nerves in the superficial terminals and sub-basal plexus, relative to young mice. Dendritic cell density and morphology were similar in both groups. Conclusions In mice, aging is associated with higher tear secretion and corneal epithelial thinning, together with lower corneal nerve density and sensitivity. However, aging was not significantly associated with changes to tear osmolarity or dendritic cell density or size, despite a significant reduction in total nerve length. These findings demonstrate that aged mice exhibit some changes to ocular surface parameters that parallel the anomalies evident in dry eye disease.
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Affiliation(s)
| | - Lisa J Hill
- Neuroscience and Ophthalmology Research Group, Institute of Clinical Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Laura E Downie
- Department of Optometry and Vision Sciences, University of Melbourne, Parkville, Victoria, Australia
| | - Holly R Chinnery
- Department of Optometry and Vision Sciences, University of Melbourne, Parkville, Victoria, Australia
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29
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Shikama Y, Kurosawa M, Furukawa M, Ishimaru N, Matsushita K. Involvement of adiponectin in age-related increases in tear production in mice. Aging (Albany NY) 2019; 11:8329-8346. [PMID: 31596727 PMCID: PMC6814586 DOI: 10.18632/aging.102322] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2019] [Accepted: 09/21/2019] [Indexed: 11/25/2022]
Abstract
Common age-related changes in the human eye contribute to the development of dry eye, including decreases in aqueous tear production. Although the infiltration of lymphocytes into the lacrimal glands occurs with age, age-related increases in tear production have also been observed in mice; however, the mechanisms underlying this increase remain unclear. We herein demonstrated that increases in tear production were not dependent on body weight gain or systemic conditions, such as insulin resistance, using aged mice and high-fat diet-fed mice. The results obtained also showed that senescence-associated T (SA-T) cells accumulated in the lacrimal glands of aged mice, particularly females. Expression levels of the nuclear transcription factor peroxisome proliferator-activated receptor-γ (PPARγ) in whole lacrimal glands and epithelial cells isolated from lacrimal glands were significantly higher in aged mice than in young mice. The expression levels of adiponectin and one of its receptors, AdipoR2, also increased in the lacrimal glands of aged mice, but not in those of high-fat diet-fed mice. Collectively, the present results indicate that PPARγ and adiponectin-mediated signaling contribute to age-related increases in tear production in mice and have potential as therapeutic targets for the treatment of dry eye in humans.
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Affiliation(s)
- Yosuke Shikama
- Department of Oral Disease Research, National Center for Geriatrics and Gerontology, Obu 474-8511, Japan
| | - Mie Kurosawa
- Department of Oral Disease Research, National Center for Geriatrics and Gerontology, Obu 474-8511, Japan
| | - Masae Furukawa
- Department of Oral Disease Research, National Center for Geriatrics and Gerontology, Obu 474-8511, Japan
| | - Naozumi Ishimaru
- Department of Oral Molecular Pathology, Tokushima University Graduate School of Biomedical Sciences, Tokushima 770-8504, Japan
| | - Kenji Matsushita
- Department of Oral Disease Research, National Center for Geriatrics and Gerontology, Obu 474-8511, Japan
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Rao P, McKown RL, Laurie GW, Suvas S. Development of lacrimal gland inflammation in the mouse model of herpes stromal keratitis. Exp Eye Res 2019; 184:101-106. [PMID: 31009613 PMCID: PMC6570564 DOI: 10.1016/j.exer.2019.04.022] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Revised: 04/02/2019] [Accepted: 04/18/2019] [Indexed: 01/01/2023]
Abstract
Herpes stromal keratitis (HSK) is a chronic immunoinflammatory condition which develops in response to recurrent herpes simplex virus-1 (HSV-1) infection of the cornea. Patients with HSK often demonstrate the concurrence of corneal desiccation and the loss of blink reflex. However, the relationship between severity of HSK, level of basal tears and inflammation of the lacrimal gland is mostly unexplored. In this study, we compared these variables in extraorbital lacrimal gland (EoLG) after corneal HSV-1 infection in the C57BL/6J mouse model. Our results showed a significant reduction in the volume of tears in infected eyes during the development of HSK. Extensive architectural damage to EoLG, presumably caused by a massive influx of interferon-gamma secreting T cells, was observed during clinical disease period of HSK. A positive correlation between the decrease in tear volume, severity of HSK and the damage to EoLG were evident in infected mice. The presence of infectious virus measured in EoLG during pre-clinical, but not clinical disease period of HSK, suggested that viral cytopathic effects are not the major contributors of extensive damage seen in EoLG. Furthermore, topical administration of lacritin peptide delayed but did not prevent the decrease in tears in HSV-1 infected mice, and had no significant effect in either reducing the severity of HSK or T cell infiltration in EoLG of infected mice. Together, our results showed an interplay between the severity of HSK, inflammation of EoLG, and the reduced level of tears after corneal HSV-1 infection.
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Affiliation(s)
- Pushpa Rao
- Department of Ophthalmology, Visual and Anatomical Sciences, Wayne State University School of Medicine, Detroit, MI, USA
| | - Robert L McKown
- Department of Integrated Science and Technology, James Madison University, Harrisonburg, VA, USA
| | - Gordon W Laurie
- Department of Cell Biology and Ophthalmology, University of Virginia, Charlottesville, VA, USA
| | - Susmit Suvas
- Department of Ophthalmology, Visual and Anatomical Sciences, Wayne State University School of Medicine, Detroit, MI, USA; Kresge Eye Institute, Wayne State University School of Medicine, Detroit, MI, USA.
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de Souza RG, de Paiva CS, Alves MR. Age-related Autoimmune Changes in Lacrimal Glands. Immune Netw 2019; 19:e3. [PMID: 30838158 PMCID: PMC6399097 DOI: 10.4110/in.2019.19.e3] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2018] [Revised: 02/10/2019] [Accepted: 02/11/2019] [Indexed: 02/08/2023] Open
Abstract
Aging is a complex process associated with dysregulation of the immune system and low levels of inflammation, often associated with the onset of many pathologies. The lacrimal gland (LG) plays a vital role in the maintenance of ocular physiology and changes related to aging directly affect eye diseases. The dysregulation of the immune system in aging leads to quantitative and qualitative changes in antibodies and cytokines. While there is a gradual decline of the immune system, there is an increase in autoimmunity, with a reciprocal pathway between low levels of inflammation and aging mechanisms. Elderly C57BL/6J mice spontaneously show LGs infiltration that is characterized by Th1 but not Th17 cells. The aging of the LG is related to functional alterations, reduced innervation and decreased secretory activities. Lymphocytic infiltration, destruction, and atrophy of glandular parenchyma, ductal dilatation, and secretion of inflammatory mediators modify the volume and composition of tears. Oxidative stress, the capacity to metabolize and eliminate toxic substances decreased in aging, is also associated with the reduction of LG functionality and the pathogenesis of autoimmune diseases. Although further studies are required for a better understanding of autoimmunity and aging of the LG, we described anatomic and immunology aspects that have been described so far.
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Affiliation(s)
- Rodrigo G de Souza
- University of Sao Paulo, Sao Paulo, Brazil.,Department of Ophthalmology, Baylor College of Medicine, Houston, TX, USA
| | - Cintia S de Paiva
- University of Sao Paulo, Sao Paulo, Brazil.,Department of Ophthalmology, Baylor College of Medicine, Houston, TX, USA
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Eksioglu U, Atilgan HI, Yakin M, Yazihan N, Altiparmak UE, Yumusak N, Korkmaz M, Demir A, Ornek F, Aribal Ayral P, Koca G. Antioxidant effects of vitamin D on lacrimal glands against high dose radioiodine-associated damage in an animal model. Cutan Ocul Toxicol 2018; 38:18-24. [PMID: 30003810 DOI: 10.1080/15569527.2018.1498507] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
PURPOSE To evaluate antioxidant effects of active vitamin D (calcitriol) against high-dose radioiodine (RAI) therapy-associated damage of lacrimal gland. MATERIALS AND METHODS Wistar albino rats were used and divided into three groups randomly (n = 12/group). The first group was appointed as the negative control group and received no RAI or medication. The second group was appointed as the positive control group that only received 3 mCi/kg (111 MBq/kg) RAI via gastric gavage and the last group was the treatment group that received 3 mCi/kg RAI via same method and calcitriol (200 ng/kg/day) via intraperitoneal administration. Seven days after RAI administration, bilateral intraorbital (IG), extraorbital (EG) and Harderian (HG) glands were removed for the evaluations of histopathologic, tissue cytokine, total oxidant status (TOS) and total antioxidant status (TAS). RESULTS RAI led to significant increase in tissue TOS, TNF-α, IL-6 levels and significant decrease in IL-10 and TAS levels (p < 0.05 for each). Addition of adjunctive calcitriol reversed all these parameters significantly (p < 0.05 for each).The following histopathologic parameters were seen more frequently in positive control group than the other groups: Abnormal lobular pattern, perivascular infiltration, periductal infiltration, lipofuscin-like accumulation, acinar atrophy, periductal and periacinar fibrosis in all lacrimal gland types (p < 0.05), acinar fibrosis in EG (p = 0.049), periductal fibrosis in EG and HG (p = 0.049 and 0.038, respectively), abnormal cell outlines in EG and HG (p = 0.020 and 0.011, respectively) and variation in cell size in the IG and the HG (p = 0.003 and 0.049 respectively). CONCLUSIONS RAI caused significant oxidative stress and inflammation in lacrimal glands. Vitamin D demonstrated potent anti-inflammatory, antioxidant and radio-protective effects on lacrimal glands in histopathologic, tissue cytokine and oxidant/antioxidant level evaluations.
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Affiliation(s)
- Umit Eksioglu
- a Department of Ophthalmology , Ankara Training and Research Hospital of University of Health Sciences , Ankara , Turkey
| | - Hasan Ikbal Atilgan
- b Department of Nuclear Medicine , Mustafa Kemal University, Faculty of Medicine , Turkey
| | - Mehmet Yakin
- a Department of Ophthalmology , Ankara Training and Research Hospital of University of Health Sciences , Ankara , Turkey
| | - Nuray Yazihan
- c Department of Pathophysiology , Ankara University, Faculty of Medicine , Ankara , Turkey
| | - Ugur Emrah Altiparmak
- d Department of Ophthalmology , Acibadem University Medical School, Acibadem Ankara Hospital , Ankara , Turkey
| | - Nihat Yumusak
- e Faculty of Veterinary Medicine , Harran University , Sanliurfa , Turkey
| | - Meliha Korkmaz
- f Department of Nuclear Medicine , Ankara Training and Research Hospital of University of Health Sciences , Ankara , Turkey
| | - Ayten Demir
- g Faculty of Health Sciences , Ankara University , Ankara , Turkey
| | - Firdevs Ornek
- a Department of Ophthalmology , Ankara Training and Research Hospital of University of Health Sciences , Ankara , Turkey
| | - Pelin Aribal Ayral
- c Department of Pathophysiology , Ankara University, Faculty of Medicine , Ankara , Turkey
| | - Gokhan Koca
- f Department of Nuclear Medicine , Ankara Training and Research Hospital of University of Health Sciences , Ankara , Turkey
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Žiniauskaite A, Ragauskas S, Hakkarainen JJ, Rich CC, Baumgartner R, Kalesnykas G, Albers DS, Kaja S. Efficacy of Trabodenoson in a Mouse Keratoconjunctivitis Sicca (KCS) Model for Dry-Eye Syndrome. ACTA ACUST UNITED AC 2018; 59:3088-3093. [DOI: 10.1167/iovs.18-24432] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Affiliation(s)
| | | | | | - Cadmus C. Rich
- Inotek Pharmaceuticals Corp., Lexington, Massachusetts, United States
| | | | | | - David S. Albers
- Inotek Pharmaceuticals Corp., Lexington, Massachusetts, United States
| | - Simon Kaja
- Experimentica Ltd., Kuopio, Finland
- Departments of Ophthalmology and Molecular Pharmacology and Therapeutics, Stritch School of Medicine, Loyola University Chicago, Maywood, Illinois, United States
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Bakeeva LE, Eldarov CM, Vangely IM, Kolosova NG, Vays VB. Mitochondria-targeted antioxidant SkQ1 reduces age-related alterations in the ultrastructure of the lacrimal gland. Oncotarget 2018; 7:80208-80222. [PMID: 27852065 PMCID: PMC5348314 DOI: 10.18632/oncotarget.13303] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Accepted: 11/02/2016] [Indexed: 12/17/2022] Open
Abstract
Dry eye syndrome is an eye disorder affecting many people at an old age. Because dry eye syndrome is accelerated by aging, a useful approach to the prevention of this syndrome may be an intervention into the aging process. Previously, we showed that the mitochondria-targeted antioxidant SkQ1 delays manifestations of aging and inhibits the development of age-related diseases including dry eye syndrome. Nevertheless, the link between SkQ1's effects and its suppression of age-related changes in the lacrimal gland remains unclear. Here we demonstrated that dietary supplementation with SkQ1 (250 nmol/[kg body weight] daily) starting at age 1.5 months significantly alleviated the pathological changes in lacrimal glands of Wistar rats by age 24 months. By this age, lacrimal glands underwent dramatic deterioration of the ultrastructure that was indicative of irreversible disturbances in these glands' functioning. In contrast, in SkQ1-treated rats, the ultrastructure of the lacrimal gland was similar to that in much younger rats. Morphometric analysis of electron-microscopic specimens of lacrimal glands revealed the presence of numerous secretory granules in acinar cells and a significant increase in the number of operating intercalary ducts. Our results confirm that dietary supplementation with SkQ1 is a promising approach to healthy ageing and to prevention of aberrations in the lacrimal gland that underlie dry eye syndrome.
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Affiliation(s)
- Lora E Bakeeva
- Lomonosov Moscow State University, Belozersky Institute of Physico-Chemical Biology, Moscow, Russia
| | - Chupalav M Eldarov
- Lomonosov Moscow State University, Belozersky Institute of Physico-Chemical Biology, Moscow, Russia
| | - Irina M Vangely
- Lomonosov Moscow State University, Belozersky Institute of Physico-Chemical Biology, Moscow, Russia
| | - Nataliya G Kolosova
- Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences, Novosibirsk, Russia.,Novosibirsk State University, Novosibirsk, Russia
| | - Valeriya B Vays
- Lomonosov Moscow State University, Belozersky Institute of Physico-Chemical Biology, Moscow, Russia
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Yakin M, Eksioglu U, Sadic M, Koca G, Ozkan-Uney G, Yumusak N, Husniye Telek H, Demir A, Yazihan N, Ornek F, Korkmaz M. Coenzyme Q10 for the Protection of Lacrimal Gland against High-Dose Radioiodine Therapy-Associated Oxidative Damage: Histopathologic and Tissue Cytokine Level Assessments in an Animal Model. Curr Eye Res 2017; 42:1590-1596. [PMID: 28937867 DOI: 10.1080/02713683.2017.1362006] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
PURPOSE To evaluate protective effect of coenzyme Q10 (CoQ10) in lacrimal glands against high-dose radioactive iodine (RAI)-associated oxidative damage. MATERIALS AND METHODS Thirty Wistar albino rats were randomly divided into three groups. Group 1 was the control group. Group 2 received 3 mCi/kg RAI via gastric gavage but no medication. Group 3 received 3 mCi/kg RAI via gastric gavage and 30 mg/kg/day CoQ10 intraperitoneally. CoQ10 was started at day one just before RAI administration and continued for five days. Seven days after RAI therapy, the animals were anesthetized and decapitated. Intraorbital (IG), extraorbital (EG), and Harderian (HG) lacrimal glands were removed bilaterally for histopathological and tissue cytokine level assessments. RESULTS Abnormal lobular pattern, acinar fibrosis, lipofuscin-like accumulations, perivascular infiltration, cell size variation, abnormal cell outlines, irregular nucleus shapes in all lacrimal gland types (p < 0.05 for each), periductal fibrosis, periductal and periacinar fibrosis in EG (p = 0.01, 0.044, respectively) and in HG (p = 0.036, 0.044, respectively), periductal infiltration in HG (p = 0.039) and IG (p = 0.029), acinar atrophy in EG (p = 0.044), and cell shape variation in IG (p = 0.036) were observed more frequently in group 2 than in other groups. RAI caused significant increase in TNF-α, IL-6, nuclear factor kappa B, and total oxidant status, and decrease in IL-2, IL-10, and total antioxidant status levels (p < 0.05 for each). Addition of CoQ10 decreased all cytokine levels, increased nuclear factor kappa B levels more, and increased total antioxidant status levels significantly (p < 0.05 for each). CONCLUSIONS RAI administration causes prominent inflammatory response in lacrimal glands. Addition of CoQ10 ameliorates the oxidative damage and protects lacrimal glands both in histopathological and tissue cytokine level assessments. Protection of lacrimal glands against oxidative damage may become a new era of CoQ10 use in the future.
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Affiliation(s)
- Mehmet Yakin
- a Department of Ophthalmology , Ankara Training and Research Hospital , Ankara , Turkey
| | - Umit Eksioglu
- a Department of Ophthalmology , Ankara Training and Research Hospital , Ankara , Turkey
| | - Murat Sadic
- b Department of Nuclear Medicine , Ankara Training and Research Hospital , Ankara , Turkey
| | - Gokhan Koca
- b Department of Nuclear Medicine , Ankara Training and Research Hospital , Ankara , Turkey
| | - Guner Ozkan-Uney
- a Department of Ophthalmology , Ankara Training and Research Hospital , Ankara , Turkey
| | - Nihat Yumusak
- c Department of Pathology, Faculty of Veterinary Medicine , Harran University , Sanliurfa , Turkey
| | - Hande Husniye Telek
- a Department of Ophthalmology , Ankara Training and Research Hospital , Ankara , Turkey
| | - Ayten Demir
- d Faculty of Health Sciences , Ankara University , Ankara , Turkey
| | - Nuray Yazihan
- e Department of Pathophysiology , Ankara University Faculty of Medicine , Ankara , Turkey
| | - Firdevs Ornek
- a Department of Ophthalmology , Ankara Training and Research Hospital , Ankara , Turkey
| | - Meliha Korkmaz
- b Department of Nuclear Medicine , Ankara Training and Research Hospital , Ankara , Turkey
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Nooh HZ, El-Saify GH, Eldien NMN. Neuroprotective effects of food restriction on autonomic innervation of the lacrimal gland in the rat. Ann Anat 2017; 213:8-18. [DOI: 10.1016/j.aanat.2017.05.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2016] [Revised: 04/29/2017] [Accepted: 05/11/2017] [Indexed: 01/14/2023]
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Abstract
Pain associated with mechanical, chemical, and thermal heat stimulation of the ocular surface is mediated by trigeminal ganglion neurons, while cold thermoreceptors detect wetness and reflexly maintain basal tear production and blinking rate. These neurons project into two regions of the trigeminal brain stem nuclear complex: ViVc, activated by changes in the moisture of the ocular surface and VcC1, mediating sensory-discriminative aspects of ocular pain and reflex blinking. ViVc ocular neurons project to brain regions that control lacrimation and spontaneous blinking and to the sensory thalamus. Secretion of the main lacrimal gland is regulated dominantly by autonomic parasympathetic nerves, reflexly activated by eye surface sensory nerves. These also evoke goblet cell secretion through unidentified efferent fibers. Neural pathways involved in the regulation of meibomian gland secretion or mucin release have not been identified. In dry eye disease, reduced tear secretion leads to inflammation and peripheral nerve damage. Inflammation causes sensitization of polymodal and mechano-nociceptor nerve endings and an abnormal increase in cold thermoreceptor activity, altogether evoking dryness sensations and pain. Long-term inflammation and nerve injury alter gene expression of ion channels and receptors at terminals and cell bodies of trigeminal ganglion and brainstem neurons, changing their excitability, connectivity and impulse firing. Perpetuation of molecular, structural and functional disturbances in ocular sensory pathways ultimately leads to dysestesias and neuropathic pain referred to the eye surface. Pain can be assessed with a variety of questionaires while the status of corneal nerves is evaluated with esthesiometry and with in vivo confocal microscopy.
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Bron AJ, de Paiva CS, Chauhan SK, Bonini S, Gabison EE, Jain S, Knop E, Markoulli M, Ogawa Y, Perez V, Uchino Y, Yokoi N, Zoukhri D, Sullivan DA. TFOS DEWS II pathophysiology report. Ocul Surf 2017; 15:438-510. [PMID: 28736340 DOI: 10.1016/j.jtos.2017.05.011] [Citation(s) in RCA: 988] [Impact Index Per Article: 141.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2017] [Accepted: 05/26/2017] [Indexed: 12/18/2022]
Abstract
The TFOS DEWS II Pathophysiology Subcommittee reviewed the mechanisms involved in the initiation and perpetuation of dry eye disease. Its central mechanism is evaporative water loss leading to hyperosmolar tissue damage. Research in human disease and in animal models has shown that this, either directly or by inducing inflammation, causes a loss of both epithelial and goblet cells. The consequent decrease in surface wettability leads to early tear film breakup and amplifies hyperosmolarity via a Vicious Circle. Pain in dry eye is caused by tear hyperosmolarity, loss of lubrication, inflammatory mediators and neurosensory factors, while visual symptoms arise from tear and ocular surface irregularity. Increased friction targets damage to the lids and ocular surface, resulting in characteristic punctate epithelial keratitis, superior limbic keratoconjunctivitis, filamentary keratitis, lid parallel conjunctival folds, and lid wiper epitheliopathy. Hybrid dry eye disease, with features of both aqueous deficiency and increased evaporation, is common and efforts should be made to determine the relative contribution of each form to the total picture. To this end, practical methods are needed to measure tear evaporation in the clinic, and similarly, methods are needed to measure osmolarity at the tissue level across the ocular surface, to better determine the severity of dry eye. Areas for future research include the role of genetic mechanisms in non-Sjögren syndrome dry eye, the targeting of the terminal duct in meibomian gland disease and the influence of gaze dynamics and the closed eye state on tear stability and ocular surface inflammation.
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Affiliation(s)
- Anthony J Bron
- Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, UK; Vision and Eye Research Unit, Anglia Ruskin University, Cambridge, UK.
| | - Cintia S de Paiva
- Department of Ophthalmology, Baylor College of Medicine, Houston, TX, USA
| | - Sunil K Chauhan
- Schepens Eye Research Institute & Massachusetts Eye and Ear, Harvard Medical School, Boston, MA, USA
| | - Stefano Bonini
- Department of Ophthalmology, University Campus Biomedico, Rome, Italy
| | - Eric E Gabison
- Department of Ophthalmology, Fondation Ophtalmologique Rothschild & Hôpital Bichat Claude Bernard, Paris, France
| | - Sandeep Jain
- Department of Ophthalmology and Visual Sciences, University of Illinois at Chicago, Chicago, IL, USA
| | - Erich Knop
- Departments of Cell and Neurobiology and Ocular Surface Center Berlin, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Maria Markoulli
- School of Optometry and Vision Science, University of New South Wales, Sydney, Australia
| | - Yoko Ogawa
- Department of Ophthalmology, Keio University School of Medicine, Tokyo, Japan
| | - Victor Perez
- Department of Ophthalmology, Bascom Palmer Eye Institute, University of Miami, Miami, FL, USA
| | - Yuichi Uchino
- Department of Ophthalmology, Keio University School of Medicine, Tokyo, Japan
| | - Norihiko Yokoi
- Department of Ophthalmology, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Driss Zoukhri
- Tufts University School of Dental Medicine, Boston, MA, USA
| | - David A Sullivan
- Schepens Eye Research Institute & Massachusetts Eye and Ear, Harvard Medical School, Boston, MA, USA
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Shatos MA, Hodges RR, Morinaga M, McNay DE, Islam R, Bhattacharya S, Li D, Turpie B, Makarenkova HP, Masli S, Utheim TP, Dartt DA. Alteration in cellular turnover and progenitor cell population in lacrimal glands from thrombospondin 1 -/- mice, a model of dry eye. Exp Eye Res 2016; 153:27-41. [PMID: 27697548 DOI: 10.1016/j.exer.2016.09.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2016] [Revised: 09/22/2016] [Accepted: 09/30/2016] [Indexed: 12/26/2022]
Abstract
The purpose of this study was to investigate the changes that occur in the lacrimal glands (LGs) in female thrombospondin 1 knockout (TSP1-/-) mice, a mouse model of the autoimmune disease Sjogren's syndrome. The LGs of 4, 12, and 24 week-old female TSP1-/- and C57BL/6J (wild type, WT) mice were used. qPCR was performed to measure cytokine expression. To study the architecture, LG sections were stained with hematoxylin and eosin. Cell proliferation was measured using bromo-deoxyuridine and immunohistochemistry. Amount of CD47 and stem cell markers was analyzed by western blot analysis and location by immunofluorescence microscopy. Expression of stem cell transcription factors was performed using Mouse Stem Cell Transcription Factors RT2 Profiler PCR Array. Cytokine levels significantly increased in LGs of 24 week-old TSP1-/- mice while morphological changes were detected at 12 weeks. Proliferation was decreased in 12 week-old TSP1-/- mice. Three transcription factors were overexpressed and eleven underexpressed in TSP1-/- compared to WT LGs. The amount of CD47, Musashi1, and Sox2 was decreased while the amount of ABCG2 was increased in 12 week-old TSP1-/- mice. We conclude that TSP1 is necessary for maintaining normal LG homeostasis. Absence of TSP1 alters cytokine levels and stem cell transcription factors, LG cellular architecture, decreases cell proliferation, and alters amount of stem cell markers.
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Affiliation(s)
- Marie A Shatos
- Schepens Eye Research Institute/Massachusetts Eye and Ear, Department of Ophthalmology, Harvard Medical School, United States
| | - Robin R Hodges
- Schepens Eye Research Institute/Massachusetts Eye and Ear, Department of Ophthalmology, Harvard Medical School, United States
| | - Masahiro Morinaga
- Schepens Eye Research Institute/Massachusetts Eye and Ear, Department of Ophthalmology, Harvard Medical School, United States
| | - David E McNay
- Schepens Eye Research Institute/Massachusetts Eye and Ear, Department of Ophthalmology, Harvard Medical School, United States
| | - Rakibul Islam
- Schepens Eye Research Institute/Massachusetts Eye and Ear, Department of Ophthalmology, Harvard Medical School, United States
| | - Sumit Bhattacharya
- Schepens Eye Research Institute/Massachusetts Eye and Ear, Department of Ophthalmology, Harvard Medical School, United States
| | - Dayu Li
- Schepens Eye Research Institute/Massachusetts Eye and Ear, Department of Ophthalmology, Harvard Medical School, United States
| | - Bruce Turpie
- Department of Ophthalmology, Boston University School of Medicine, Boston, MA, United States
| | - Helen P Makarenkova
- Department of Cell and Molecular Biology, The Scripps Research Institute, La Jolla, CA, United States
| | - Sharmila Masli
- Department of Ophthalmology, Boston University School of Medicine, Boston, MA, United States
| | - Tor P Utheim
- Department of Medical Biochemistry, Oslo University Hospital, Oslo, Norway; Institute of Oral Biology, Faculty of Dentistry, University of Oslo, Oslo, Norway
| | - Darlene A Dartt
- Schepens Eye Research Institute/Massachusetts Eye and Ear, Department of Ophthalmology, Harvard Medical School, United States.
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Aluri HS, Kublin CL, Thotakura S, Armaos H, Samizadeh M, Hawley D, Thomas WM, Leavis P, Makarenkova HP, Zoukhri D. Role of Matrix Metalloproteinases 2 and 9 in Lacrimal Gland Disease in Animal Models of Sjögren's Syndrome. Invest Ophthalmol Vis Sci 2015; 56:5218-28. [PMID: 26244298 DOI: 10.1167/iovs.15-17003] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
PURPOSE Chronic inflammation of the lacrimal gland results in changes in the composition of the extracellular matrix (ECM), which is believed to compromise tissue repair. We hypothesized that increased production/activity of matrix metalloproteinases (MMPs), especially MMP-2 and -9, in inflamed lacrimal glands modifies the ECM environment, therefore disrupting tissue repair. METHODS The lacrimal glands from female MRL/lpr and male NOD mice along with their respective control strains were harvested and divided into three pieces and processed for histology, immunohistochemistry, zymography, Western blotting, and RNA analyses. In another study, MRL/lpr mice were treated for 5 weeks with a selective MMP2/9 inhibitor peptide or a control peptide. At the end of treatment, the lacrimal glands were excised and the tissue was processed as described above. RESULTS There was a 2.5- and 2.7-fold increase in MMP2 gene expression levels in MRL/lpr and NOD mice, respectively. Matrix metalloproteinase 2 and 9 enzymatic activities and protein expression levels were significantly upregulated in the lacrimal glands of MRL/lpr and NOD mice compared to controls. Treatment with the MMP2/9 inhibitor resulted in decreased activity of MMP-2 and -9 both in vitro and in vivo. Importantly, MMP2/9 inhibitor treatment of MRL/lpr mice improved aqueous tear production and resulted in reduced number and size of lymphocytic foci in diseased lacrimal glands. CONCLUSIONS We conclude that MMP2/9 expression and activity are elevated in lacrimal glands of two murine models of Sjögren's syndrome, suggesting that manipulation of MMP2/9 activity might be a potential therapeutic target in chronically inflamed lacrimal glands.
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Affiliation(s)
- Hema S Aluri
- Department of Diagnosis and Health Promotion Tufts University School of Dental Medicine, Boston, Massachusetts, United States
| | - Claire L Kublin
- Department of Diagnosis and Health Promotion Tufts University School of Dental Medicine, Boston, Massachusetts, United States
| | - Suharika Thotakura
- Department of Diagnosis and Health Promotion Tufts University School of Dental Medicine, Boston, Massachusetts, United States
| | - Helene Armaos
- Department of Diagnosis and Health Promotion Tufts University School of Dental Medicine, Boston, Massachusetts, United States
| | - Mahta Samizadeh
- Department of Diagnosis and Health Promotion Tufts University School of Dental Medicine, Boston, Massachusetts, United States
| | - Dillon Hawley
- Department of Diagnosis and Health Promotion Tufts University School of Dental Medicine, Boston, Massachusetts, United States
| | - William M Thomas
- Department of Cell and Molecular Biology, The Scripps Research Institute, La Jolla, California, United States
| | - Paul Leavis
- Department of Integrative Physiology and Pathobiology, Tufts University, Boston, Massachusetts, United States
| | - Helen P Makarenkova
- Department of Cell and Molecular Biology, The Scripps Research Institute, La Jolla, California, United States
| | - Driss Zoukhri
- Department of Diagnosis and Health Promotion Tufts University School of Dental Medicine, Boston, Massachusetts, United States
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Makarenkova HP, Dartt DA. Myoepithelial Cells: Their Origin and Function in Lacrimal Gland Morphogenesis, Homeostasis, and Repair. CURRENT MOLECULAR BIOLOGY REPORTS 2015; 1:115-123. [PMID: 26688786 PMCID: PMC4683023 DOI: 10.1007/s40610-015-0020-4] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Lacrimal gland (LG) is an exocrine tubuloacinar gland that secretes the aqueous layer of the tear film. LG epithelium is composed of ductal, acinar, and myoepithelial cells (MECs) bordering the basal lamina and separating the epithelial layer from the extracellular matrix. Mature MECs have contractile ability and morphologically resemble smooth muscle cells; however, they exhibit features typical for epithelial cells, such as the presence of specific cytokeratin filaments. Increasing evidence supports the assertion that myoepithelial cells (MECs) play key roles in the lacrimal gland development, homeostasis, and stabilizing the normal structure and polarity of LG secretory acini. MECs take part in the formation of extracellular matrix gland and participate in signal exchange between epithelium and stroma. MECs have a high level of plasticity and are able to differentiate into several cell lineages. Here, we provide a review on some of the MEC characteristics and their role in LG morphogenesis, maintenance, and repair.
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Affiliation(s)
- Helen P. Makarenkova
- Department of Cell and Molecular Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA
| | - Darlene A. Dartt
- Schepens Eye Research Institute/Massachusetts Eye and Ear, Department of Ophthalmology, Harvard Medical School, Boston, MA, USA
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You IC, Bian F, Volpe EA, de Paiva CS, Pflugfelder SC. Age-Related Conjunctival Disease in the C57BL/6.NOD-Aec1Aec2 Mouse Model of Sjögren Syndrome Develops Independent of Lacrimal Dysfunction. Invest Ophthalmol Vis Sci 2015; 56:2224-33. [PMID: 25758816 DOI: 10.1167/iovs.14-15668] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
PURPOSE To investigate parameters of ocular surface disease in C57BL/6.NOD-Aec1Aec2 (Aec) mice with aging and their correlation with development of Sjögren syndrome (SS)-like lacrimal gland (LG) disease. METHODS Aec and C57BL/6 wild-type (B6) female mice were evaluated at 4, 12, and 20 weeks of age. Whole LG and eyes and adnexa were excised for histology and gene expression analysis and evaluated by flow cytometry and immunohistochemistry. Tear volume and goblet cell density was measured. Quantitative PCR evaluated T-cell-related cytokine expression in cornea and conjunctiva. RESULTS Both strains showed age-related conjunctival goblet cell loss that was more pronounced in the Aec strain and significantly greater than in B6 mice at 12 weeks. This was accompanied by CD4+ T-cell infiltration of the conjunctiva that was greater in Aec strain at 20 weeks. Aec mice had higher levels of IL-17A, IL-17R, IL-1α, IL-1β, and TNF-α in the conjunctiva, and they significantly increase with aging. Aec mice had greater lymphocytic infiltration of the LG and conjunctiva at 20 weeks that consisted of a mixture of CD4+ and CD8+ cells. Flow cytometry showed a significant increase in CD4+ T cells in Aec LG compared to B6 mice. Tear volume was significantly increased in both strains at 20 weeks. CONCLUSIONS Aec mice developed greater conjunctival goblet cell loss associated with lymphocytic infiltration of the LG and conjunctiva with aging. Increased expression of certain T helper or inflammatory cytokines in these tissues was observed in Aec mice. The conjunctival disease appeared to be due to inflammation and not a decrease in tear volume.
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Affiliation(s)
- In-Cheon You
- Department of Ophthalmology, Research Institute of Clinical Medicine of Chonbuk National University-Biomedical Research Institute, Chonbuk National University Hospital, Jeonju, Jeonbuk, Korea 2Ocular Surface Center, Department of Ophthalmology, Cullen Eye
| | - Fang Bian
- Ocular Surface Center, Department of Ophthalmology, Cullen Eye Institute, Baylor College of Medicine, Houston, Texas, United States
| | - Eugene A Volpe
- Ocular Surface Center, Department of Ophthalmology, Cullen Eye Institute, Baylor College of Medicine, Houston, Texas, United States
| | - Cintia S de Paiva
- Ocular Surface Center, Department of Ophthalmology, Cullen Eye Institute, Baylor College of Medicine, Houston, Texas, United States
| | - Stephen C Pflugfelder
- Ocular Surface Center, Department of Ophthalmology, Cullen Eye Institute, Baylor College of Medicine, Houston, Texas, United States
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Bioengineered Lacrimal Gland Organ Regeneration in Vivo. J Funct Biomater 2015; 6:634-49. [PMID: 26264034 PMCID: PMC4598675 DOI: 10.3390/jfb6030634] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2015] [Revised: 07/18/2015] [Accepted: 07/23/2015] [Indexed: 12/23/2022] Open
Abstract
The lacrimal gland plays an important role in maintaining a homeostatic environment for healthy ocular surfaces via tear secretion. Dry eye disease, which is caused by lacrimal gland dysfunction, is one of the most prevalent eye disorders and causes ocular discomfort, significant visual disturbances, and a reduced quality of life. Current therapies for dry eye disease, including artificial tear eye drops, are transient and palliative. The lacrimal gland, which consists of acini, ducts, and myoepithelial cells, develops from its organ germ via reciprocal epithelial-mesenchymal interactions during embryogenesis. Lacrimal tissue stem cells have been identified for use in regenerative therapeutic approaches aimed at restoring lacrimal gland functions. Fully functional organ replacement, such as for tooth and hair follicles, has also been developed via a novel three-dimensional stem cell manipulation, designated the Organ Germ Method, as a next-generation regenerative medicine. Recently, we successfully developed fully functional bioengineered lacrimal gland replacements after transplanting a bioengineered organ germ using this method. This study represented a significant advance in potential lacrimal gland organ replacement as a novel regenerative therapy for dry eye disease. In this review, we will summarize recent progress in lacrimal regeneration research and the development of bioengineered lacrimal gland organ replacement therapy.
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Rocha EM, Alves M, Rios JD, Dartt DA. The aging lacrimal gland: changes in structure and function. Ocul Surf 2015; 6:162-74. [PMID: 18827949 DOI: 10.1016/s1542-0124(12)70177-5] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The afferent nerves of the cornea and conjunctiva, efferent nerves of the lacrimal gland, and the lacrimal gland are a functional unit that works cooperatively to produce the aqueous component of tears. A decrease in the lacrimal gland secretory function can lead to dry eye disease. Because aging is a risk factor for dry eye disease, study of the changes in the function of the lacrimal gland functional unit with age is important for developing treatments to prevent dry eye disease. No one mechanism is known to induce the changes that occur with aging, although multiple different mechanisms have been associated with aging. These fall into two theoretical categories: programmed theories of aging (immunological, genetic, apoptotic, and neuroendocrine) and error theories of aging (protein alteration, somatic mutation, etc). Lacrimal glands undergo structural and functional alteration with increasing age. In mouse models of aging, it has been shown that neural stimulation of protein secretion is an early target of aging, accompanied by an increase in mast cells and lipofuscin accumulation. Hyperglycemia and increased lymphocytic infiltration can contribute to this loss of function at older ages. These findings suggest that an increase in oxidative stress may play a role in the loss of lacrimal gland function with age. For the afferent and efferent neural components of the lacrimal gland functional unit, immune or inflammatory mediated decrease in nerve function could contribute to loss of lacrimal gland secretion with age. More research in this area is critically needed.
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Affiliation(s)
- Eduardo M Rocha
- From the Department of Ophthalmology, Otorhinolaringology, and head and Neck Surgery, faculty of Medicine of Ribeirao Preto, Sao Paulo University Ribeirao, Preto, SP, Brazil; Laboratory of Clinical Physiopathology, Department of Clinical Medicine, faculty of Medical Sciences, State University of Campinas, Campinas, SP, Brazil; and Schepens Eye Research Institute and Department of Ophthalmology, harvard Medical School, Boston MA 02114 USA
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El-Fadaly AB, El-Shaarawy EAA, Rizk AA, Nasralla MM, Shuaib DMA. Age-related alterations in the lacrimal gland of adult albino rat: a light and electron microscopic study. Ann Anat 2014; 196:336-51. [PMID: 25048844 DOI: 10.1016/j.aanat.2014.06.005] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2014] [Revised: 06/14/2014] [Accepted: 06/16/2014] [Indexed: 10/25/2022]
Abstract
BACKGROUND Age related changes in the lacrimal gland are associated with alterations in the structural organization and functional response in the gland of diverse mammalian species. Dry eye syndrome is one of the most common ocular problems in the world especially in old age. It results when the lacrimal gland fails to secrete proteins and fluid in sufficient quantity or appropriate composition. AIM OF THE WORK The present study is designed to demonstrate the influence of aging on the structure of the lacrimal gland of albino rat and to provide a morphological basis to explain the pathogenesis of the dry eye syndrome with ageing. It also aims to carry out a comparative analysis of age-dependent changes in male and female rats and to address how the lacrimal gland ages in each sex. MATERIAL AND METHODS Eighty albino rats were used in this study. The animals were divided into two age groups, young adult and senile. Tear secretion was measured using a modified Schirmer test. Corneal impression cytology of the anesthetized rats was done. The glands were subjected to gross morphologic examination, microscopic examination using H&E, PAS, Masson's trichrome and Giemsa stains. Electron microscopic examination was done in addition to quantitative histomorphometric estimations included acinar density, ductal count and mast cell count. RESULTS Light microscopic examination of the lacimal glands of the senile rats revealed different pathological changes. These included acinar, ductal as well as stromal changes. Electron microscope examination of the lacrimal gland of the senile group showed a decrease in the electron dense secretory vesicles, mitochondrial swelling and lipofuscin-like inclusions were frequently seen in the cytoplasm of acinar cells in senile rats. CONCLUSION The structural changes in the lacrimal glands of senile rats were associated with reduction in tear secretion as well as alterations in corneal epithelium. Gender difference in lacrimal gland structure was recorded.
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Affiliation(s)
- Amina B El-Fadaly
- Department of Anatomy and Embryology, Faculty of Medicine, Cairo University, Egypt
| | - Ehab A A El-Shaarawy
- Department of Anatomy and Embryology, Faculty of Medicine, Cairo University, Egypt.
| | - Ayman A Rizk
- Department of Anatomy and Embryology, Faculty of Medicine, Cairo University, Egypt
| | - Mogeda M Nasralla
- Department of Anatomy and Embryology, Faculty of Medicine, Cairo University, Egypt
| | - Doaa M A Shuaib
- Department of Anatomy and Embryology, Faculty of Medicine, Cairo University, Egypt
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Expression and localization of aging markers in lacrimal gland of chronic graft-versus-host disease. Sci Rep 2014; 3:2455. [PMID: 23986066 PMCID: PMC3756340 DOI: 10.1038/srep02455] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2013] [Accepted: 07/30/2013] [Indexed: 12/14/2022] Open
Abstract
Aging is commonly defined as the accumulation of diverse deleterious changes in cells and tissues with advancing age. To investigate whether aging changes are involved in the lacrimal glands of chronic graft-versus-host disease (cGVHD) model mice, we obtained the specimens from cGVHD model mice, untreated aged and young mice, and examined by histopathology, and immunoblotting. Oxidative stress markers, 8-OHdG, 4-HNE, and hexonoyl lesion (HEL), and other aging markers, p16 and p38, were used to assess the samples. The infiltrating mononuclear cells and endothelia of capillaries in the cGVHD and aged mice expressed the oxidative stress markers and other aging markers, but not in the young mice. Histological changes and the expression of aging markers in the samples from cGVHD mice exhibited similar features to those in aging mice. These results suggest that changes that typically appear with advanced age occur earlier in the lives of mice with lacrimal gland cGVHD.
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Ultrastructural changes in ageing lacrimal gland in Wistar rats. Bull Exp Biol Med 2014; 157:268-72. [PMID: 24952496 DOI: 10.1007/s10517-014-2542-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2013] [Indexed: 10/25/2022]
Abstract
We studied age-related ultrastructural reorganization in acinar cells and intercalary ducts of the lacrimal gland acini in 3-, 15-, and 24-month-old Wistar rats. Ultrastructural changes in the lacrimal gland progressed with age and led to dramatic ultrastructural reconstruction of the lacrimal gland at the age of 24 months. These changes mainly included complete destruction of acinar cells and increase in the number of enlarged branched ducts that filled the greater part of gland volume; these dusts were lined with epithelial cells with altered ultrastructure. Acinar cells in the acini communicate via special connecting intermembrane complexes formed by desmosomes and mitochondria adjacent to them in each contacting cell. It is assumed that association of mitochondria with desmosomes found in the acini is a special functional complex indicating that every single acinus is a functional formation. This assumption is indirectly confirmed by the fact that the destruction never occurred in a single cell, but always involved all cells constituting the acini. The revealed ultrastructural changes reflect age-related deterioration of the secretory function of the lacrimal gland.
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Acar DE, Acar U, Yumusak N, Korkmaz M, Acar M, Atilgan HI, Yalniz-Akkaya Z, Koca G. Reducing the Histopathological Changes of Radioiodine to the Lacrimal Glands by a Popular Anti-Oxidant: Lycopene. Curr Eye Res 2014; 39:659-65. [DOI: 10.3109/02713683.2013.867354] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Rocha EM, Cotrim AP, Zheng C, Riveros PP, Baum BJ, Chiorini JA. Recovery of radiation-induced dry eye and corneal damage by pretreatment with adenoviral vector-mediated transfer of erythropoietin to the salivary glands in mice. Hum Gene Ther 2014; 24:417-23. [PMID: 23402345 DOI: 10.1089/hum.2012.111] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
Therapeutic doses of radiation (RTx) causes dry eye syndrome (DES), dry mouth, and as in other sicca syndromes, they are incurable. The aims of this work are as follows: (a) to evaluate a mouse model of DES induced by clinically relevant doses of radiation, and (b) to evaluate the protective effect of erythropoietin (Epo) in preventing DES. C3H female mice were subjected to five sessions of RTx, with or without pre-RTx retroductal administration of the AdLTR2EF1a-hEPO (AdEpo) vector in the salivary glands (SG), and compared with naïve controls at Day 10 (10d) (8 Gy fractions) and 56 days (56d) (6 Gy fractions) after RTx treatment. Mice were tested for changes in lacrimal glands (LG), tear secretion (phenol red thread), weight, hematocrit (Hct), and markers of inflammation, as well as microvessels and oxidative damage. Tear secretion was reduced in both RTx groups, compared to controls, by 10d. This was also seen at 56d in RTx but not AdEpo+RTx group. Hct was significantly higher in all AdEpo+RTx mice at 10d and 56d. Corneal epithelium was significantly thinner at 10d in the RTx group compared with AdEpo+RTx or the control mice. There was a significant reduction at 10d in vascular endothelial growth factor (VEGF)-R2 in LG in the RTx group that was prevented in the AdEpo+RTx group. In conclusion, RTx is able to induce DES in mice. AdEpo administration protected corneal epithelia and resulted in some recovery of LG function, supporting the value of further studies using gene therapy for extraglandular diseases.
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Affiliation(s)
- Eduardo M Rocha
- Department of Ophthalmology, Otorhinolaringology and Head & Neck Surgery, Faculty of Medicine of Ribeirão Preto, São Paulo University, Ribeirao Preto 14049900, Brazil.
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