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Hu P, Cai J, Yang C, Xu L, Ma S, Song H, Yang P. SLAMF3 promotes Th17 differentiation and is reversed by iguratimod through JAK1/STAT3 pathway in primary Sjögren's syndrome. Int Immunopharmacol 2024; 126:111282. [PMID: 38061117 DOI: 10.1016/j.intimp.2023.111282] [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: 08/04/2023] [Revised: 11/14/2023] [Accepted: 11/21/2023] [Indexed: 12/28/2023]
Abstract
OBJECTIVE The signaling lymphocytic activation molecule family of receptors (SLAMF) is involved in the activation of T cells and plays important roles in the pathogenesis of autoimmune diseases. The purpose of this study is to observe the expression of SLAMF3 on CD4 + T cells and its effect on the differentiation of T helper 17 (Th17) in primary Sjögren's syndrome (pSS). Furthermore, we found iguratimod (IGU) could effectively reverse the aberrant Th17 differentiation through JAK1/STAT3 signaling. METHODS Peripheral blood mononuclear cells from 40 pSS and 40 healthy control subjects were enrolled for analysis of expression of SLAMF3 on CD4 + T and Th17 cells by flow cytometry. Serum IL-17 and SLAMF3 were detected by ELISA assay. Labial biopsies from 20 pSS patients and 20 non-pSS controls were performed immunohistochemical for staining expression of CD4, IL-17, and SLAMF3. Under the priming conditions with anti-CD3/CD28 or CD3/SLAMF3 antibodies on CD4 + T cells extracted from pSS and controls, the proportion of Th17 cells in CD4 + T cells and the amount of soluble IL-17A were assessed by flow cytometry and ELISA. Furthermore, RNA sequencing was performed for the transcriptomics study. Additionally, RNA level of RORγt and IL-17A and the protein level of RORγt, p-JAK1 and p-STAT3, were detected by real-time PCR and western blot. RESULTS The expression levels of SLAMF3 on CD4 + T and Th17 cells in the peripheral blood and salivary glands in pSS patients were significantly elevated than that in control groups. The serum IL-17A and SLAMF3 in pSS patients were much higher compared with the control group. Although co-stimulation of CD3/SLAMF3 could promote CD4 + T cells differentiate into Th17 cells both in pSS and controls, the CD4 + T cells from pSS have a more sensitive response in Th17 differentiation with the SLAMF3 stimulation. Transcriptomics results showed the CD3/SLAMF3 stimulation caused the activation of Th17 signaling and JAK1/STAT3 pathway. Quantitative PCR and western blotting confirmed the IGU (iguratimod), which is a safe clinical drug in treatment of autoimmune diseases, effectively reversed the increased Th17 proportion, the expression levels of RORγt, pJAK1, and pSTAT3 caused by CD3/SLAMF3 stimulation. CONCLUSION SLAMF3 upregulates Th17 cell differentiation of CD4 + T cells and IL-17A secretion through enriching RORγt and activating the transcriptomics participating in the pathogenesis of primary Sjögren's syndrome. IGU could inhibit the process through this therapeutic target in pSS.
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Affiliation(s)
- Peini Hu
- Department of Rheumatology and Immunology, The First Hospital of China Medical University, Shenyang 110001, People's Republic of China
| | - Juan Cai
- Department of Rheumatology and Immunology, The First Hospital of China Medical University, Shenyang 110001, People's Republic of China
| | - Chunshu Yang
- Department of 1st Cancer Institute, The First Hospital of China Medical University, Shenyang 110001, People's Republic of China
| | - Lingling Xu
- Department of Rheumatology and Immunology, The First Hospital of China Medical University, Shenyang 110001, People's Republic of China
| | - Siyang Ma
- Department of Rheumatology and Immunology, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou 121000, People's Republic of China
| | - Haining Song
- Department of Rheumatology and Immunology, Chifeng Municipal Hospital, Chifeng 024000, People's Republic of China
| | - Pingting Yang
- Department of Rheumatology and Immunology, The First Hospital of China Medical University, Shenyang 110001, People's Republic of China.
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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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Chen Y, Pu J, Li X, Lian L, Ge C, Liu Z, Wang W, Hou L, Chen W, Li J. Aim2 Deficiency Ameliorates Lacrimal Gland Destruction and Corneal Epithelium Defects in an Experimental Dry Eye Model. Invest Ophthalmol Vis Sci 2023; 64:26. [PMID: 36920364 PMCID: PMC10029764 DOI: 10.1167/iovs.64.3.26] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/16/2023] Open
Abstract
Purpose Dry eye disease (DED) is a multifactorial disease that is associated with inflammation. Excessive DNA is present in the tear fluid of patients with DED. Absent in melanoma 2 (AIM2) is a key DNA sensor. This study aimed to investigate the role of AIM2 in the pathogenesis of DED. Methods DED was induced by injection of scopolamine (SCOP). Aberrant DNA was detected by cell-free DNA (cfDNA) ELISA and immunostaining. Corneal epithelial defects were assessed by corneal fluorescein staining, zonula occludens-1 immunostaining and TUNEL. Tear production was analyzed by phenol red thread test. Lacrimal gland (LG) histology was evaluated by hematoxylin and eosin staining, and transmission electron microscopy examination. Macrophage infiltration in LG was detected by immunohistochemistry for the macrophage marker F4/80. Gene expression was analyzed by RT-qPCR. Protein production was examined by immunoblot analysis or ELISA. Results Aim2-/- mice displayed a normal structure and function of LG and cornea under normal conditions. In SCOP-induced DED, wild type (WT) mice showed increased cfDNA in tear fluid, and aberrant accumulations of dsDNA accompanied by increased AIM2 expression in the LG. In SCOP-induced DED, WT mice displayed damaged structures of LG, reduced tear production, and severe corneal epithelium defects, whereas Aim2-/- mice had a better preserved LG structure, less decreased tear production, and improved clinical signs of dry eye. Furthermore, genetic deletion of Aim2 suppressed the increased infiltration of macrophages and inhibited N-GSDMD and IL18 production in the LG of SCOP-induced DED. Conclusions Aim2 deficiency alleviates ocular surface damage and LG inflammation in SCOP-induced DED.
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Affiliation(s)
- Yu Chen
- State Key Laboratory of Ophthalmology, Optometry and Visual Science, Eye Hospital, Wenzhou Medical University, Wenzhou, China
| | - Jiheng Pu
- State Key Laboratory of Ophthalmology, Optometry and Visual Science, Eye Hospital, Wenzhou Medical University, Wenzhou, China
- Department of Ophthalmology, The East Beijing Medical Center of Chinese PLA General Hospital, Beijing, China
| | - Xinda Li
- State Key Laboratory of Ophthalmology, Optometry and Visual Science, Eye Hospital, Wenzhou Medical University, Wenzhou, China
| | - Lili Lian
- State Key Laboratory of Ophthalmology, Optometry and Visual Science, Eye Hospital, Wenzhou Medical University, Wenzhou, China
- National Clinical Research Center for Ocular Diseases, Eye Hospital, Wenzhou Medical University, Wenzhou, China
| | - Chaoxiang Ge
- State Key Laboratory of Ophthalmology, Optometry and Visual Science, Eye Hospital, Wenzhou Medical University, Wenzhou, China
- National Clinical Research Center for Ocular Diseases, Eye Hospital, Wenzhou Medical University, Wenzhou, China
| | - Zuimeng Liu
- State Key Laboratory of Ophthalmology, Optometry and Visual Science, Eye Hospital, Wenzhou Medical University, Wenzhou, China
| | - Weizhuo Wang
- State Key Laboratory of Ophthalmology, Optometry and Visual Science, Eye Hospital, Wenzhou Medical University, Wenzhou, China
| | - Ling Hou
- State Key Laboratory of Ophthalmology, Optometry and Visual Science, Eye Hospital, Wenzhou Medical University, Wenzhou, China
| | - Wei Chen
- State Key Laboratory of Ophthalmology, Optometry and Visual Science, Eye Hospital, Wenzhou Medical University, Wenzhou, China
- National Clinical Research Center for Ocular Diseases, Eye Hospital, Wenzhou Medical University, Wenzhou, China
| | - Jinyang Li
- State Key Laboratory of Ophthalmology, Optometry and Visual Science, Eye Hospital, Wenzhou Medical University, Wenzhou, China
- National Clinical Research Center for Ocular Diseases, Eye Hospital, Wenzhou Medical University, Wenzhou, China
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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: 13] [Impact Index Per Article: 13.0] [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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Chen B, Zhou J, Mao T, Cao T, Hu S, Zhang W, Li X, Qin X, Liu X, Watanabe N, Li J. The Critical Biomarkers Identification of Insulin Signaling Involved in Initiating cAMP Signaling Mediated Salivary Secretion in Sjogren Syndrome: Transcriptome Sequencing in NOD Mice Model. Biol Proced Online 2022; 24:26. [PMID: 36575389 PMCID: PMC9793606 DOI: 10.1186/s12575-022-00189-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2022] [Accepted: 12/14/2022] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND Sjogren's syndrome (SS) is an autoimmune disorder characterized by the destruction of exocrine glands, resulting in dry mouth and eyes. Currently, there is no effective treatment for SS, and the mechanisms associated with inadequate salivary secretion are poorly understood. METHODS In this study, we used NOD mice model to monitor changes in mice's salivary secretion and water consumption. Tissue morphology of the submandibular glands was examined by H&E staining, and Immunohistochemical detected the expression of AQP5 (an essential protein in salivary secretion). Global gene expression profiling was performed on submandibular gland tissue of extracted NOD mice model using RNA-seq. Subsequently, a series of bioinformatics analyses of transcriptome sequencing was performed, including differentially expressed genes (DEGs) identification, Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment analysis, PPI network construction, hub gene identification, and the validity of diagnostic indicators using the dataset GSE40611. Finally, IFN-γ was used to treat the cells, the submandibular gland tissue of NOD mice model was extracted, and RT-qPCR was applied to verify the expression of hub genes. RESULTS We found that NOD mice model had reduced salivary secretion and increased water consumption. H&E staining suggests acinar destruction and basement membrane changes in glandular tissue. Immunohistochemistry detects a decrease in AQP5 immunostaining within acinar. In transcriptome sequencing, 42 overlapping DEGs were identified, and hub genes (REN, A2M, SNCA, KLK3, TTR, and AZGP1) were identified as initiating targets for insulin signaling. In addition, insulin signaling and cAMP signaling are potential pathways for regulating salivary secretion and constructing a regulatory relationship between target-cAMP signaling-salivary secretion. CONCLUSION The new potential targets and signal axes for regulating salivary secretion provide a strategy for SS therapy in a clinical setting.
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Affiliation(s)
- Bo Chen
- grid.410737.60000 0000 8653 1072Guangdong Engineering Research Center of Oral Restoration and Reconstruction, Affiliated Stomatology Hospital of Guangzhou Medical University, #195 Dongfeng West Road, Guangzhou, 510140 Guangdong China
| | - Jiannan Zhou
- grid.410737.60000 0000 8653 1072Guangdong Engineering Research Center of Oral Restoration and Reconstruction, Affiliated Stomatology Hospital of Guangzhou Medical University, #195 Dongfeng West Road, Guangzhou, 510140 Guangdong China
| | - Tianjiao Mao
- grid.410737.60000 0000 8653 1072Guangdong Engineering Research Center of Oral Restoration and Reconstruction, Affiliated Stomatology Hospital of Guangzhou Medical University, #195 Dongfeng West Road, Guangzhou, 510140 Guangdong China
| | - Tingting Cao
- grid.410737.60000 0000 8653 1072Guangdong Engineering Research Center of Oral Restoration and Reconstruction, Affiliated Stomatology Hospital of Guangzhou Medical University, #195 Dongfeng West Road, Guangzhou, 510140 Guangdong China
| | - Shilin Hu
- grid.410737.60000 0000 8653 1072Guangdong Engineering Research Center of Oral Restoration and Reconstruction, Affiliated Stomatology Hospital of Guangzhou Medical University, #195 Dongfeng West Road, Guangzhou, 510140 Guangdong China
| | - Wenqi Zhang
- grid.410737.60000 0000 8653 1072School of Basic Medicine, Guangzhou Medical University, Guangzhou, Guangdong China
| | - Xueyang Li
- grid.410737.60000 0000 8653 1072Guangdong Engineering Research Center of Oral Restoration and Reconstruction, Affiliated Stomatology Hospital of Guangzhou Medical University, #195 Dongfeng West Road, Guangzhou, 510140 Guangdong China
| | - Xiuni Qin
- Guangzhou Concord Cancer Center, Guangzhou, Guangdong China
| | - Xintong Liu
- grid.509461.f0000 0004 1757 8255Chemical Biology Research Group, RIKEN Center for Sustainable Resource Science, Wako, Saitama, 351-0198 Japan ,grid.509461.f0000 0004 1757 8255Bio-Active Compounds Discovery Unit, RIKEN Center for Sustainable Resource Science, Wako, Saitama, 351-0198 Japan
| | - Nobumoto Watanabe
- grid.509461.f0000 0004 1757 8255Chemical Biology Research Group, RIKEN Center for Sustainable Resource Science, Wako, Saitama, 351-0198 Japan ,grid.509461.f0000 0004 1757 8255Bio-Active Compounds Discovery Unit, RIKEN Center for Sustainable Resource Science, Wako, Saitama, 351-0198 Japan
| | - Jiang Li
- grid.410737.60000 0000 8653 1072Guangdong Engineering Research Center of Oral Restoration and Reconstruction, Affiliated Stomatology Hospital of Guangzhou Medical University, #195 Dongfeng West Road, Guangzhou, 510140 Guangdong China
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Innate immunity dysregulation in aging eye and therapeutic interventions. Ageing Res Rev 2022; 82:101768. [PMID: 36280210 DOI: 10.1016/j.arr.2022.101768] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Revised: 09/29/2022] [Accepted: 10/20/2022] [Indexed: 01/31/2023]
Abstract
The prevalence of eye diseases increases considerably with age, resulting in significant vision impairment. Although the pathobiology of age-related eye diseases has been studied extensively, the contribution of immune-related changes due to aging remains elusive. In the eye, tissue-resident cells and infiltrating immune cells regulate innate responses during injury or infection. But due to aging, these cells lose their protective functions and acquire pathological phenotypes. Thus, dysregulated ocular innate immunity in the elderly increases the susceptibility and severity of eye diseases. Herein, we emphasize the impact of aging on the ocular innate immune system in the pathogenesis of infectious and non-infectious eye diseases. We discuss the role of age-related alterations in cellular metabolism, epigenetics, and cellular senescence as mechanisms underlying altered innate immune functions. Finally, we describe approaches to restore protective innate immune functions in the aging eye. Overall, the review summarizes our current understanding of innate immune functions in eye diseases and their dysregulation during aging.
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Xin X, Wang Q, Qing J, Song W, Gui Y, Li X, Li Y. Th17 cells in primary Sjögren’s syndrome negatively correlate with increased Roseburia and Coprococcus. Front Immunol 2022; 13:974648. [PMID: 36275752 PMCID: PMC9579428 DOI: 10.3389/fimmu.2022.974648] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Accepted: 09/06/2022] [Indexed: 11/30/2022] Open
Abstract
Background Dysbiosis of the gut microbiota is closely related to chronic systemic inflammation and autoimmunity, playing an essential role in the pathogenesis of primary Sjögren’s syndrome (pSS). Abnormalities in the proportions of blood T lymphocyte subtype, that is Th17/Treg, were detected in pSS patients. We aimed to determine the associations between gut microbiota and Th17/Treg in pSS. Method 98 pSS patients and 105 healthy controls (NC) were enrolled between Dec 1, 2018, and Aug 31, 2019. The baseline information and clinical parameters on pSS patients and healthy controls were collected. 16S rRNA sequencing was performed to characterize the gut microbiome and identify gut microbes that are differentially abundant between patients and healthy controls. Lastly, associations between relative abundances of specific bacterial taxa in the gut and clinical outcome parameters were evaluated. Results Patients with pSS show decreased gut microbial diversity and richness, decreased abundance of butyrate producing bacteria, such as Roseburia and Coprococcus, and increased abundance of other taxa, such as Eubacterium rectale and Roseburia inulinivorans. These bacteria are enriched with functions related to glycolytic and lipogenic, energy, substance, galactose, pentose metabolism pathways and glucuronate interconversions, decreased with functions related to peptidoglycan biosynthesis, pyrimidine metabolism pathways. An integrative analysis identified pSS-related specific bacterial taxa in the gut, for which the abundance of Eubacterium rectale is negatively correlated with Th17/Treg. Furthermore, the pathways of biosynthesis of secondary metabolites, biosynthesis of amino acids, peptidoglycan biosynthesis and pyrimidine, galactose, pentose, microbial metabolism in diverse environments, glyoxylate and dicarboxylate metabolism are associated with Treg or Th17/Treg. Conclusions Primary Sjögren’s syndrome could lead to decreased gut microbial diversity and richness of intestinal flora in patients. The proportions of Th17 and Treg cells induced by microbiota were predictive pSS manifestations and accounted for the pSS severity.
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Affiliation(s)
- Xiaohong Xin
- Core Laboratory, Shanxi Provincial People’s Hospital (Fifth Hospital) of Shanxi Medical University, Taiyuan, China
- Institute of Nephrology, Peking University, Beijing, China
- Key Laboratory of Renal Disease, Ministry of Health of China, Beijing, China
| | - Qian Wang
- Shanxi Provincial Key Laboratory of Kidney Disease, Shanxi Provincial People’s Hospital (Fifth Hospital), Taiyuan, China
| | - Jianbo Qing
- Core Laboratory, Shanxi Provincial People’s Hospital (Fifth Hospital) of Shanxi Medical University, Taiyuan, China
- Shanxi Provincial Key Laboratory of Kidney Disease, Shanxi Provincial People’s Hospital (Fifth Hospital), Taiyuan, China
- Department of Nephrology, Shanxi Provincial People’s Hospital (Fifth Hospital) of Shanxi Medical University, Taiyuan, China
| | - Wenzhu Song
- Core Laboratory, Shanxi Provincial People’s Hospital (Fifth Hospital) of Shanxi Medical University, Taiyuan, China
- School of Public Health, Shanxi Medical University, Taiyuan, China
| | - Yanni Gui
- Department of Rheumatology and Clinical Immunology, Peking University First Hospital, Beijing, China
| | - Xiaofeng Li
- Academy of Microbial Ecology, Shanxi Medical University, Taiyuan, China
- Department of Rheumatology, The Second Hospital of Shanxi Medical University, Taiyuan, China
- Key Laboratory of Cellular Physiology, Ministry of Education, Taiyuan, China
- *Correspondence: Yafeng Li, ; Xiaofeng Li,
| | - Yafeng Li
- Core Laboratory, Shanxi Provincial People’s Hospital (Fifth Hospital) of Shanxi Medical University, Taiyuan, China
- Shanxi Provincial Key Laboratory of Kidney Disease, Shanxi Provincial People’s Hospital (Fifth Hospital), Taiyuan, China
- Department of Nephrology, Shanxi Provincial People’s Hospital (Fifth Hospital) of Shanxi Medical University, Taiyuan, China
- Academy of Microbial Ecology, Shanxi Medical University, Taiyuan, China
- *Correspondence: Yafeng Li, ; Xiaofeng Li,
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8
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Li L, Jasmer KJ, Camden JM, Woods LT, Martin AL, Yang Y, Layton M, Petris MJ, Baker OJ, Weisman GA, Petris CK. Early Dry Eye Disease Onset in a NOD.H-2h4 Mouse Model of Sjögren's Syndrome. Invest Ophthalmol Vis Sci 2022; 63:18. [PMID: 35727180 PMCID: PMC9233292 DOI: 10.1167/iovs.63.6.18] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Purpose To develop a mouse model of human dry eye disease (DED) for investigation of sex differences in autoimmune-associated dry eye pathology. Methods Ocular surface disease was assessed by quantifying corneal epithelial damage with lissamine green stain in the NOD.H-2h4,IFNγ−/−,CD28−/− (NOD.H-2h4 DKO) mouse model of Sjögren's syndrome (SS). Lacrimal gland function was assessed by tear volume quantification with phenol red thread and lacrimal gland inflammation (i.e., dacryoadenitis) was assessed by quantification of immune cell foci, flow cytometric analysis of immune cell composition, and expression of proinflammatory markers. Results The NOD.H-2h4 DKO mouse model of SS exhibits greater age-dependent increases in corneal damage than in NOD.H-2h4 parental mice and demonstrates an earlier disease onset in females compared to males. The severity of ocular surface disease correlates with loss of goblet cell density, increased conjunctivitis, and dacryoadenitis that is more pronounced in NOD.H-2h4 DKO than NOD.H-2h4 mice. B cells dominate lacrimal infiltrates in 16-week-old NOD.H-2h4 and NOD.H-2h4 DKO mice, but T helper cells and macrophages are also present. Lacrimal gland expression of proinflammatory genes, including the P2X7 and P2Y2 purinergic receptors, is greater in NOD.H-2h4 DKO than NOD.H-2h4 mice and correlates with dacryoadenitis. Conclusions Our results demonstrate for the first time that autoimmune dry eye disease occurs in both sexes of NOD.H-2h4 DKO and NOD.H-2h4 mice, with earlier onset in female NOD.H-2h4 DKO mice when compared to males of the same strain. This study demonstrates that both NOD.H-2h4 and NOD.H-2h4 DKO mice are novel models that closely resemble SS-related and sex-dependent DED.
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Affiliation(s)
- Lili Li
- Division of Biochemistry, University of Missouri, Columbia, Missouri, United States.,Christopher S. Bond Life Sciences Center, University of Missouri, Columbia, Missouri, United States.,Visual Science and Optometry Center, The People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, Guangxi, China
| | - Kimberly J Jasmer
- Division of Biochemistry, University of Missouri, Columbia, Missouri, United States.,Christopher S. Bond Life Sciences Center, University of Missouri, Columbia, Missouri, United States
| | - Jean M Camden
- Division of Biochemistry, University of Missouri, Columbia, Missouri, United States.,Christopher S. Bond Life Sciences Center, University of Missouri, Columbia, Missouri, United States
| | - Lucas T Woods
- Division of Biochemistry, University of Missouri, Columbia, Missouri, United States.,Christopher S. Bond Life Sciences Center, University of Missouri, Columbia, Missouri, United States
| | - Adam L Martin
- Division of Biochemistry, University of Missouri, Columbia, Missouri, United States.,Christopher S. Bond Life Sciences Center, University of Missouri, Columbia, Missouri, United States
| | - Yong Yang
- Division of Biochemistry, University of Missouri, Columbia, Missouri, United States.,Christopher S. Bond Life Sciences Center, University of Missouri, Columbia, Missouri, United States.,Department of Ophthalmology, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China
| | - Maria Layton
- Division of Biochemistry, University of Missouri, Columbia, Missouri, United States.,Division of Biological Sciences, University of Missouri, Columbia, Missouri, United States
| | - Michael J Petris
- Division of Biochemistry, University of Missouri, Columbia, Missouri, United States.,Christopher S. Bond Life Sciences Center, University of Missouri, Columbia, Missouri, United States.,Department of Ophthalmology, University of Missouri, Columbia, Missouri, United States
| | - Olga J Baker
- Division of Biochemistry, University of Missouri, Columbia, Missouri, United States.,Christopher S. Bond Life Sciences Center, University of Missouri, Columbia, Missouri, United States.,Department of Otolaryngology-Head and Neck Surgery, University of Missouri, Columbia, Missouri, United States
| | - Gary A Weisman
- Division of Biochemistry, University of Missouri, Columbia, Missouri, United States.,Christopher S. Bond Life Sciences Center, University of Missouri, Columbia, Missouri, United States
| | - Carisa K Petris
- Department of Ophthalmology, University of Missouri, Columbia, Missouri, United States.,Mason Eye Institute, University of Missouri, Columbia, Missouri, United States
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9
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Yang N, Liu X, Chen X, Yu S, Yang W, Liu Y. Stem cells from exfoliated deciduous teeth transplantation ameliorates Sjögren's syndrome by secreting soluble PD-L1. J Leukoc Biol 2021; 111:1043-1055. [PMID: 34622984 DOI: 10.1002/jlb.6ma0921-752rr] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Mesenchymal stem cell transplantation (MSCT) regulates immune cells, and is a promising therapeutic approach for treating autoimmune diseases. Stem cells from human exfoliated deciduous teeth (SHED) are a unique postnatal stem cell population from the cranial neural crest with high self-renewal, multipotent differentiation, and superior immunomodulatory properties. However, the mechanisms by which SHED can treat autoimmune diseases remain unclear. Sjögren's syndrome (SS) is an autoimmune disease histologically characterized by high lymphocytic infiltration in the salivary and lacrimal glands that results in dryness symptoms. This study explores the potential of systemic transplantation of SHED to ameliorate SS-induced dryness symptoms in mice. Overall, SHED could rescue the balance of regulatory T cell (Treg)/T helper cell 17 (Th17) in the recipient SS mice. Mechanistically, SHED promoted Treg conversion and inhibited Th17 function via paracrine effects, which were related to the secretion of soluble programmed cell death ligand 1 (sPD-L1). Moreover, it directly induced Th17 apoptosis via cell-cell contact, leading to the up-regulation of Treg and down-regulation of Th17 cells. In summary, SHED-mediated rescue of Treg/Th17 balance via the sPD-L1/PD-1 pathway ameliorates the gland inflammation and dryness symptoms in SS mice. These findings suggest that SHED are a promising stem cell source for the treatment of autoimmune diseases in the clinical setting.
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Affiliation(s)
- Ning Yang
- Department of Pediatric Dentistry, School and Hospital of Stomatology, China Medical University, Shenyang, China.,Liaoning Provincial Key Laboratory of Oral Diseases, Shenyang, China
| | - Xuemei Liu
- Department of Pediatric Dentistry, School and Hospital of Stomatology, China Medical University, Shenyang, China.,Liaoning Provincial Key Laboratory of Oral Diseases, Shenyang, China
| | - Xu Chen
- Department of Pediatric Dentistry, School and Hospital of Stomatology, China Medical University, Shenyang, China.,Liaoning Provincial Key Laboratory of Oral Diseases, Shenyang, China
| | - Si Yu
- Department of Pediatric Dentistry, School and Hospital of Stomatology, China Medical University, Shenyang, China
| | - Wenxiao Yang
- Department of Pediatric Dentistry, School and Hospital of Stomatology, China Medical University, Shenyang, China
| | - Yao Liu
- Department of Pediatric Dentistry, School and Hospital of Stomatology, China Medical University, Shenyang, China.,Liaoning Provincial Key Laboratory of Oral Diseases, Shenyang, China
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10
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Galletti JG, de Paiva CS. Age-related changes in ocular mucosal tolerance: Lessons learned from gut and respiratory tract immunity. Immunology 2021; 164:43-56. [PMID: 33837534 DOI: 10.1111/imm.13338] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Revised: 02/28/2021] [Accepted: 03/24/2021] [Indexed: 12/12/2022] Open
Abstract
The ocular surface is the part of the visual system directly exposed to the environment, and it comprises the cornea, the first refractive tissue layer and its surrounding structures. The ocular surface has evolved to keep the cornea smooth and wet, a prerequisite for proper sight, and also protected. To this aim, the ocular surface is a bona fide mucosal niche with an immune system capable of fighting against dangerous pathogens. However, due to the potential harmful effects of uncontrolled inflammation, the ocular surface has several mechanisms to keep the immune response in check. Specifically, the ocular surface is maintained inflammation-free and functional by a particular form of peripheral tolerance known as mucosal tolerance, markedly different from the immune privilege of intraocular structures. Remarkably, conjunctival tolerance is akin to the oral and respiratory tolerance mechanisms found in the gut and airways, respectively. And also similarly, this form of immunoregulation in the eye is affected by ageing just as it is in the digestive and respiratory tracts. With ageing comes an increased prevalence of immune-based ocular surface disorders, which could be related to an age-related impairment of conjunctival tolerance. The purpose of this review was to summarize the present knowledge of ocular mucosal tolerance and how it is affected by the ageing process in the light of the current literature on mucosal immunoregulation of the gut and airways.
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Affiliation(s)
- Jeremias G Galletti
- Innate Immunity Laboratory, Institute of Experimental Medicine (IMEX), National Academy of Medicine/CONICET, Buenos Aires, Argentina
| | - Cintia S de Paiva
- Department of Ophthalmology, Ocular Surface Center, Cullen Eye Institute, Baylor College of Medicine, Houston, TX, USA
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11
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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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12
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Roszkowska AM, Oliverio GW, Aragona E, Inferrera L, Severo AA, Alessandrello F, Spinella R, Postorino EI, Aragona P. Ophthalmologic Manifestations of Primary Sjögren's Syndrome. Genes (Basel) 2021; 12:genes12030365. [PMID: 33806489 PMCID: PMC7998625 DOI: 10.3390/genes12030365] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Revised: 02/27/2021] [Accepted: 03/01/2021] [Indexed: 02/06/2023] Open
Abstract
Sjögren’s syndrome (SS) is a chronic, progressive, inflammatory, autoimmune disease, characterized by the lymphocyte infiltration of exocrine glands, especially the lacrimal and salivary, with their consequent destruction. The onset of primary SS (pSS) may remain misunderstood for several years. It usually presents with different types of severity, e.g., dry eye and dry mouth symptoms, due to early involvement of the lacrimal and salivary glands, which may be associated with parotid enlargement and dry eye; keratoconjunctivitis sicca (KCS) is its most common ocular manifestation. It is still doubtful if the extent ocular surface manifestations are secondary to lacrimal or meibomian gland involvement or to the targeting of corneal and conjunctival autoantigens. SS is the most representative cause of aqueous deficient dry eye, and the primary role of the inflammatory process was evidenced. Recent scientific progress in understanding the numerous factors involved in the pathogenesis of pSS was registered, but the exact mechanisms involved still need to be clarified. The unquestionable role of both the innate and adaptive immune system, participating actively in the induction and evolution of the disease, was recognized. The ocular surface inflammation is a central mechanism in pSS leading to the decrease of lacrimal secretion and keratoconjunctival alterations. However, there are controversies about whether the ocular surface involvement is a direct autoimmune target or secondary to the inflammatory process in the lacrimal gland. In this review, we aimed to present actual knowledge relative to the pathogenesis of the pSS, considering the role of innate immunity, adaptive immunity, and genetics.
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Affiliation(s)
- Anna Maria Roszkowska
- Ophthalmology Clinic, Department of Biomedical Sciences, University Hospital of Messina, 98124 Messina, Italy; (G.W.O.); (L.I.); (A.A.S.); (F.A.); (R.S.); (E.I.P.); (P.A.)
- Correspondence:
| | - Giovanni William Oliverio
- Ophthalmology Clinic, Department of Biomedical Sciences, University Hospital of Messina, 98124 Messina, Italy; (G.W.O.); (L.I.); (A.A.S.); (F.A.); (R.S.); (E.I.P.); (P.A.)
| | - Emanuela Aragona
- IRCCS San Raffaele Scientific Institute, Ophthalmology Clinic, Vita Salute San Raffaele University, 20132 Milan, Italy;
| | - Leandro Inferrera
- Ophthalmology Clinic, Department of Biomedical Sciences, University Hospital of Messina, 98124 Messina, Italy; (G.W.O.); (L.I.); (A.A.S.); (F.A.); (R.S.); (E.I.P.); (P.A.)
| | - Alice Antonella Severo
- Ophthalmology Clinic, Department of Biomedical Sciences, University Hospital of Messina, 98124 Messina, Italy; (G.W.O.); (L.I.); (A.A.S.); (F.A.); (R.S.); (E.I.P.); (P.A.)
| | - Federica Alessandrello
- Ophthalmology Clinic, Department of Biomedical Sciences, University Hospital of Messina, 98124 Messina, Italy; (G.W.O.); (L.I.); (A.A.S.); (F.A.); (R.S.); (E.I.P.); (P.A.)
| | - Rosaria Spinella
- Ophthalmology Clinic, Department of Biomedical Sciences, University Hospital of Messina, 98124 Messina, Italy; (G.W.O.); (L.I.); (A.A.S.); (F.A.); (R.S.); (E.I.P.); (P.A.)
| | - Elisa Imelde Postorino
- Ophthalmology Clinic, Department of Biomedical Sciences, University Hospital of Messina, 98124 Messina, Italy; (G.W.O.); (L.I.); (A.A.S.); (F.A.); (R.S.); (E.I.P.); (P.A.)
| | - Pasquale Aragona
- Ophthalmology Clinic, Department of Biomedical Sciences, University Hospital of Messina, 98124 Messina, Italy; (G.W.O.); (L.I.); (A.A.S.); (F.A.); (R.S.); (E.I.P.); (P.A.)
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13
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Welss J, Punchago N, Feldt J, Paulsen F. The distribution of conjunctival goblet cells in mice. Ann Anat 2021; 234:151664. [PMID: 33400978 DOI: 10.1016/j.aanat.2020.151664] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Revised: 12/07/2020] [Accepted: 12/08/2020] [Indexed: 02/05/2023]
Abstract
PURPOSE To evaluate the density and distribution of conjunctival goblet cells in mice without clinical evidence of ocular surface diseases. METHODS Immediately after euthanasia of C57BL/6 wild-type mice, the eyes including eyelids were removed and fixed in paraformaldehyde. Entire eyeballs and eyelids were cut in series along the sagittal axis from nasal to temporal on a microtome and then stained with Periodic Acid-Schiff acid to visualize the goblet cells. At each section stained in this way, the conjunctival goblet cells of the entire upper and lower lid conjunctiva were counted by light microscopy. Additional (transmission electron microscopy) (TEM)-Analysis on ultrathin sections was performed to evaluate morphological differences. RESULTS The total number of conjunctival goblet cells differs markedly between individual animals. Categorisation into upper eyelid (UL) and lower eyelid (LL) and into regions (nasal, middle, temporal) revealed a significant increase of goblet cells from nasal to temporal in the UL and a significant decrease in the LL. CONCLUSION The distribution of conjunctival goblet cells in mice differs considerably from humans and between individual animals. Therefore, precise selection of sampling and methods are needed to obtain comparable data. We recommend to use the middle region of the conjunctiva of UL/LL for goblet cell studies in mice. These findings are of particular interest for dry eye mouse models as well as pharmacological studies on mice with influence on their goblet cells.
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Affiliation(s)
- Jessica Welss
- Institute of Functional and Clinical Anatomy, Friedrich Alexander University Erlangen-Nürnberg, Erlangen, Germany.
| | - Nichapa Punchago
- Institute of Functional and Clinical Anatomy, Friedrich Alexander University Erlangen-Nürnberg, Erlangen, Germany; Department of Anatomy, Khon Kaen University, Thailand
| | - Jessica Feldt
- Institute of Functional and Clinical Anatomy, Friedrich Alexander University Erlangen-Nürnberg, Erlangen, Germany
| | - Friedrich Paulsen
- Institute of Functional and Clinical Anatomy, Friedrich Alexander University Erlangen-Nürnberg, Erlangen, Germany; Department of Operative Surgery and Topographic Anatomy, Sechenov University Moscow, Russia
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14
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Masli S, Dartt DA. Mouse Models of Sjögren's Syndrome with Ocular Surface Disease. Int J Mol Sci 2020; 21:ijms21239112. [PMID: 33266081 PMCID: PMC7730359 DOI: 10.3390/ijms21239112] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Revised: 11/28/2020] [Accepted: 11/28/2020] [Indexed: 12/12/2022] Open
Abstract
Sjögren’s syndrome (SS) is a systemic rheumatic disease that predominantly affects salivary and lacrimal glands resulting in oral and ocular dryness, respectively, referred to as sicca symptoms. The clinical presentation of ocular dryness includes keratoconjunctivitis sicca (KCS), resulting from the inflammatory damage to the ocular surface tissues of cornea and conjunctiva. The diagnostic evaluation of KCS is a critical component of the classification criteria used by clinicians worldwide to confirm SS diagnosis. Therapeutic management of SS requires both topical and systemic treatments. Several mouse models of SS have contributed to our current understanding of immunopathologic mechanisms underlying the disease. This information also helps develop novel therapeutic interventions. Although these models address glandular aspects of SS pathology, their impact on ocular surface tissues is addressed only in a few models such as thrombospondin (TSP)-1 deficient, C57BL/6.NOD.Aec1Aec2, NOD.H2b, NOD.Aire KO, and IL-2Rα (CD25) KO mice. While corneal and/or conjunctival damage is reported in most of these models, the characteristic SS specific autoantibodies are only reported in the TSP-1 deficient mouse model, which is also validated as a preclinical model. This review summarizes valuable insights provided by investigations on the ocular spectrum of the SS pathology in these models.
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Affiliation(s)
- Sharmila Masli
- Department of Ophthalmology, Boston University School of Medicine, Boston, MA 02118, USA
- Correspondence: (S.M.); (D.A.D.); Tel.: +1-617-358-2195 (S.M.); +1-617-912-0272 (D.A.D.)
| | - Darlene A. Dartt
- Schepens Eye Research Institute/Massachusetts Eye and Ear, Department of Ophthalmology, Harvard Medical School, Boston, MA 02114, USA
- Correspondence: (S.M.); (D.A.D.); Tel.: +1-617-358-2195 (S.M.); +1-617-912-0272 (D.A.D.)
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15
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Trujillo-Vargas CM, Kutlehria S, Hernandez H, de Souza RG, Lee A, Yu Z, Pflugfelder SC, Singh M, de Paiva CS. Rapamycin Eyedrops Increased CD4 +Foxp3 + Cells and Prevented Goblet Cell Loss in the Aged Ocular Surface. Int J Mol Sci 2020; 21:ijms21238890. [PMID: 33255287 PMCID: PMC7727717 DOI: 10.3390/ijms21238890] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 11/12/2020] [Accepted: 11/17/2020] [Indexed: 12/13/2022] Open
Abstract
Dry eye disease (DED), one of the most prevalent conditions among the elderly, is a chronic inflammatory disorder that disrupts tear film stability and causes ocular surface damage. Aged C57BL/6J mice spontaneously develop DED. Rapamycin is a potent immunosuppressant that prolongs the lifespan of several species. Here, we compared the effects of daily instillation of eyedrops containing rapamycin or empty micelles for three months on the aged mice. Tear cytokine/chemokine profile showed a pronounced increase in vascular endothelial cell growth factor-A (VEGF-A) and a trend towards decreased concentration of Interferon gamma (IFN)-γ in rapamycin-treated groups. A significant decrease in inflammatory markers in the lacrimal gland was also evident (IFN-γ, IL-12, CIITA and Ctss); this was accompanied by slightly diminished Unc-51 Like Autophagy Activating Kinase 1 (ULK1) transcripts. In the lacrimal gland and draining lymph nodes, we also observed a significant increase in the CD45+CD4+Foxp3+ cells in the rapamycin-treated mice. More importantly, rapamycin eyedrops increased conjunctival goblet cell density and area compared to the empty micelles. Taken together, evidence from these studies indicates that topical rapamycin has therapeutic efficacy for age-associated ocular surface inflammation and goblet cell loss and opens the venue for new investigations on its role in the aging process of the eye.
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Affiliation(s)
- Claudia M. Trujillo-Vargas
- Grupo de Inmunodeficiencias Primarias, Facultad de Medicina, Universidad de Antioquia, UdeA, Medellín 050010, Colombia;
- Ocular Surface Center, Department of Ophthalmology, Cullen Eye Institute, Baylor College of Medicine, Houston, TX 77030, USA; (H.H.); (R.G.d.S.); (Z.Y.); (S.C.P.)
| | - Shallu Kutlehria
- College of Pharmacy and Pharmaceutical Sciences, Florida A&M University, Tallahassee, FL 32307, USA; (S.K.); (M.S.)
| | - Humberto Hernandez
- Ocular Surface Center, Department of Ophthalmology, Cullen Eye Institute, Baylor College of Medicine, Houston, TX 77030, USA; (H.H.); (R.G.d.S.); (Z.Y.); (S.C.P.)
| | - Rodrigo G. de Souza
- Ocular Surface Center, Department of Ophthalmology, Cullen Eye Institute, Baylor College of Medicine, Houston, TX 77030, USA; (H.H.); (R.G.d.S.); (Z.Y.); (S.C.P.)
| | - Andrea Lee
- Graduate Program in Immunology & Microbiology, Baylor College of Medicine, Houston, TX 77030, USA;
| | - Zhiyuan Yu
- Ocular Surface Center, Department of Ophthalmology, Cullen Eye Institute, Baylor College of Medicine, Houston, TX 77030, USA; (H.H.); (R.G.d.S.); (Z.Y.); (S.C.P.)
| | - Stephen C. Pflugfelder
- Ocular Surface Center, Department of Ophthalmology, Cullen Eye Institute, Baylor College of Medicine, Houston, TX 77030, USA; (H.H.); (R.G.d.S.); (Z.Y.); (S.C.P.)
| | - Mandip Singh
- College of Pharmacy and Pharmaceutical Sciences, Florida A&M University, Tallahassee, FL 32307, USA; (S.K.); (M.S.)
| | - Cintia S. de Paiva
- Ocular Surface Center, Department of Ophthalmology, Cullen Eye Institute, Baylor College of Medicine, Houston, TX 77030, USA; (H.H.); (R.G.d.S.); (Z.Y.); (S.C.P.)
- Correspondence: ; Tel.: +1-713-798-2124
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16
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Wu D, Liu N, Xu P, Sun K, Xiao W, Li C. Reduced Contrast Sensitivity Function in Central and Peripheral Vision by Disability Glare. Perception 2020; 49:1348-1361. [PMID: 33131398 DOI: 10.1177/0301006620967641] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Various glares can decrease visual performance and cause discomfort, thus increasing drivers' risk for traffic accidents in real life. The current study aimed to systematically investigate glare sensitivity in the central and peripheral visual fields by measuring contrast sensitivity function (CSF) under nonglare, steady glare, and transient glare conditions. Nine observers with normal visual acuity in the dominant eye were enrolled. The CSF in central and peripheral vision (the 5° upper left visual field) was measured in a mesopic environment while the stimulus was displayed under three conditions: nonglare, steady glare, and transient glare. An orientation identification task was used to obtain the CSF. After the experiment, the observers were asked to report their level of discomfort in the presence of the glare. The area under the log CSF (AULCSF) and cut-off spatial frequency served as indicators of visual performance. In agreement with previous studies, both steady and transient glare reduced the AULCSF and cut-off frequency. However, the AULCSF and cut-off frequency were reduced more for central vision than for nearly peripheral vision. In addition, the extent of the decreases in the AULCSF and cut-off frequency was greater for steady glare than for transient glare; in contrast, more discomfort was associated with transient glare than steady glare.
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Affiliation(s)
- Di Wu
- Yueyang Vocational Technical College, China
| | - Na Liu
- Yueyang Vocational Technical College, China
| | - Pengbo Xu
- Yueyang Vocational Technical College, China
| | - Kewei Sun
- Yueyang Vocational Technical College, China
| | - Wei Xiao
- Air Force Medical University, China.,Yueyang Vocational Technical College, China
| | - Chenxi Li
- Yueyang Vocational Technical College, China
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17
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Lio CT, Dhanda SK, Bose T. Cluster Analysis of Dry Eye Disease Models Based on Immune Cell Parameters - New Insight Into Therapeutic Perspective. Front Immunol 2020; 11:1930. [PMID: 33133058 PMCID: PMC7550429 DOI: 10.3389/fimmu.2020.01930] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2020] [Accepted: 07/17/2020] [Indexed: 12/21/2022] Open
Abstract
Dry eye disease (DED) can be represented as a display of disease in the mucosal part of the eye. It is quite distinct from the retinal side of the eye which connects with the neurons and thus represents the neuroimmunological disease. DED can occur either by the internal damage of the T cells inside the body or by microbial infections. Here we summarize the most common animal model systems used for DED relating to immune factors. We aimed to identify the most important immune cell/cytokine among the animal models of the disease. We also show the essential immune factors which are being tested for DED treatment. In our results, both the mechanism and the treatment of its animal models indicate the involvement of Th1 cells and the pro-inflammatory cytokine (IL-1β and TNF-α) related to the Th1-cells. The study is intended to increase the knowledge of the animal models in the field of the ocular surface along with the opening of a dimension of thoughts while designing a new animal model or treatment paradigm for ocular surface inflammatory disorders.
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Affiliation(s)
- Chit Tong Lio
- Chair of Experimental Bioinformatics, Technical University of Munich, Munich, Germany
| | | | - Tanima Bose
- Institute for Clinical Neuroimmunology, Ludwig Maximilian University of Munich, Munich, Germany
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18
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Alam J, de Paiva CS, Pflugfelder SC. Immune - Goblet cell interaction in the conjunctiva. Ocul Surf 2020; 18:326-334. [PMID: 31953222 DOI: 10.1016/j.jtos.2019.12.006] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Revised: 11/24/2019] [Accepted: 12/15/2019] [Indexed: 02/06/2023]
Abstract
The conjunctiva is a goblet cell rich mucosal tissue. Goblet cells are supported by tear growth factors and IL-13 produced by resident immune cells. Goblet cell secretions are essential for maintaining tear stability and ocular surface homeostasis. In addition to producing tear stabilizing mucins, they also produce cytokines and retinoic acid that condition monocyte-derived phagocytic cells in the conjunctiva. Aqueous tear deficiency from lacrimal gland disease and systemic inflammatory conditions results in goblet cell loss that amplifies dry eye severity. Reduced goblet cell density is correlated with more severe conjunctival disease, increased IFN-γ expression and antigen presenting cell maturation. Sterile Alpha Motif (SAM) pointed domain epithelial specific transcription factor (Spdef) gene deficient mice that lack goblet cells have increased infiltration of monocytes and dendritic cells with greater IL-12 expression in the conjunctiva. Similar findings were observed in the conjunctiva of aged mice. Reduced retinoic acid receptor (RXRα) signaling also increases conjunctival monocyte infiltration, IFN-γ expression and goblet cell loss. Evidence suggests that dry eye therapies that suppress IFN-γ expression preserve conjunctival goblet cell number and function and should be considered in aqueous deficiency.
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Affiliation(s)
- Jehan Alam
- Department of Ophthalmology, Baylor College of Medicine, Houston, TX, United States
| | - Cintia S de Paiva
- Department of Ophthalmology, Baylor College of Medicine, Houston, TX, United States
| | - Stephen C Pflugfelder
- Department of Ophthalmology, Baylor College of Medicine, Houston, TX, United States.
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19
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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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20
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Bjordal O, Norheim KB, Rødahl E, Jonsson R, Omdal R. Primary Sjögren's syndrome and the eye. Surv Ophthalmol 2019; 65:119-132. [PMID: 31634487 DOI: 10.1016/j.survophthal.2019.10.004] [Citation(s) in RCA: 79] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Revised: 10/07/2019] [Accepted: 10/10/2019] [Indexed: 02/07/2023]
Abstract
Primary Sjögren syndrome is an autoimmune disease that mainly affects exocrine glands such as the salivary and lacrimal glands. In addition, systemic involvement is common. Primary Sjögren syndrome is of particular interest to ophthalmologists as it constitutes an important differential diagnosis in conditions with dry eye disease. In addition, ocular tests for more precisely diagnosing and monitoring primary Sjögren syndrome have become increasingly important, and new therapeutics for local and systemic treatment evolve as a result of increased understanding of immunological mechanisms and molecular pathways in the pathogenesis of primary Sjögren syndrome. We provide an update of interest to ophthalmologists regarding pathogenesis, diagnosis, investigative procedures, and treatment options.
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Affiliation(s)
| | - Katrine Brække Norheim
- Clinical Immunology Unit, Department of Internal Medicine, Stavanger University Hospital, Stavanger, Norway
| | - Eyvind Rødahl
- Department of Ophthalmology, Haukeland University Hospital, Bergen, Norway; Department of Clinical Medicine, University of Bergen, Bergen, Norway
| | - Roland Jonsson
- Broegelmann Research Laboratory, Department of Clinical Science, University of Bergen, Bergen, Norway; Department of Rheumatology, Haukeland University Hospital, Bergen, Norway
| | - Roald Omdal
- Clinical Immunology Unit, Department of Internal Medicine, Stavanger University Hospital, Stavanger, Norway; Broegelmann Research Laboratory, Department of Clinical Science, University of Bergen, Bergen, Norway.
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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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Wang C, Zaheer M, Bian F, Quach D, Swennes AG, Britton RA, Pflugfelder SC, de Paiva CS. Sjögren-Like Lacrimal Keratoconjunctivitis in Germ-Free Mice. Int J Mol Sci 2018; 19:E565. [PMID: 29438346 PMCID: PMC5855787 DOI: 10.3390/ijms19020565] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Revised: 02/10/2018] [Accepted: 02/12/2018] [Indexed: 02/06/2023] Open
Abstract
Commensal bacteria play an important role in the formation of the immune system but their role in the maintenance of immune homeostasis at the ocular surface and lacrimal gland remains poorly understood. This study investigated the eye and lacrimal gland phenotype in germ-free and conventional C57BL/6J mice. Our results showed that germ-free mice had significantly greater corneal barrier disruption, greater goblet cell loss, and greater total inflammatory cell and CD4⁺ T cell infiltration within the lacrimal gland compared to the conventionally housed group. A greater frequency of CD4⁺IFN-γ⁺ cells was observed in germ-free lacrimal glands. Females exhibited a more severe phenotype compared to males. Adoptive transfer of CD4⁺ T cells isolated from female germ-free mice into RAG1KO mice transferred Sjögren-like lacrimal keratoconjunctivitis. Fecal microbiota transplant from conventional mice reverted dry eye phenotype in germ-free mice and decreased CD4⁺IFN-γ⁺ cells to levels similar to conventional C57BL/6J mice. These findings indicate that germ-free mice have a spontaneous lacrimal keratoconjunctivitis similar to that observed in Sjögren syndrome patients and demonstrate that commensal bacteria function in maintaining immune homeostasis on the ocular surface. Thus, manipulation of intestinal commensal bacteria has the potential to become a novel therapeutic approach to treat Sjögren Syndrome.
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Affiliation(s)
- Changjun Wang
- Eye Institute of Zhejiang University School of Medicine, Zhejiang Provincial Key Lab of Ophthalmology, Hangzhou 310009, China.
- Ocular Surface Center, Department of Ophthalmology, Cullen Eye Institute, Baylor College of Medicine, Houston, TX 77030, USA.
| | - Mahira Zaheer
- Ocular Surface Center, Department of Ophthalmology, Cullen Eye Institute, Baylor College of Medicine, Houston, TX 77030, USA.
| | - Fang Bian
- Ocular Surface Center, Department of Ophthalmology, Cullen Eye Institute, Baylor College of Medicine, Houston, TX 77030, USA.
| | - Darin Quach
- Center for Metagenomics and Microbiome Research, Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX 77030, USA.
| | - Alton G Swennes
- Center for Comparative Medicine and Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX 77030, USA.
| | - Robert A Britton
- Center for Metagenomics and Microbiome Research, Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX 77030, USA.
| | - Stephen C Pflugfelder
- Ocular Surface Center, Department of Ophthalmology, Cullen Eye Institute, Baylor College of Medicine, Houston, TX 77030, USA.
| | - Cintia S de Paiva
- Ocular Surface Center, Department of Ophthalmology, Cullen Eye Institute, Baylor College of Medicine, Houston, TX 77030, USA.
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Verstappen GM, Corneth OB, Bootsma H, Kroese FG. Th17 cells in primary Sjögren's syndrome: Pathogenicity and plasticity. J Autoimmun 2018; 87:16-25. [DOI: 10.1016/j.jaut.2017.11.003] [Citation(s) in RCA: 88] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2017] [Accepted: 11/14/2017] [Indexed: 01/10/2023]
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Postnikoff CK, Nichols KK. Neutrophil and T-Cell Homeostasis in the Closed Eye. Invest Ophthalmol Vis Sci 2017; 58:6212-6220. [PMID: 29222551 PMCID: PMC6110127 DOI: 10.1167/iovs.17-22449] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Purpose This study sought to examine the changes and phenotype of the tear neutrophil and T-cell populations between early eyelid closure and after a full night of sleep. Methods Fourteen healthy participants were recruited and trained to wash the ocular surface with PBS for at-home self-collection of ocular surface and tear leukocytes following up to 1 hour of sleep and a full night of sleep (average 7 hours), on separate days. Cells were isolated, counted, and incubated with fluorescently labeled antibodies to identify neutrophils, monocytes, and T cells. For neutrophil analysis, samples were stimulated with lipopolysaccharide (LPS) or calcium ionophore (CaI) before antibody incubation. Flow cytometry was performed. Results Following up to 1 hour of sleep, numerous leukocytes were collected (2.6 × 105 ± 3.0 × 105 cells), although significantly (P < 0.005) more accumulated with 7 hours of sleep (9.9 × 105 ± 1.2× 106 cells). Neutrophils (65%), T cells (3%), and monocytes (1%) were identified as part of the closed eye leukocyte infiltration following 7 hours of sleep. Th17 cells represented 22% of the total CD4+ population at the 7-hour time point. Neutrophil phenotype changed with increasing sleep, with a downregulation of membrane receptors CD16, CD11b, CD14, and CD15, indicating a loss in the phagocytic capability of neutrophils. Conclusions Neutrophils begin accumulating in the closed eye conjunctival sac much earlier than previously demonstrated. The closed eye tears are also populated with T cells, including a subset of Th17 cells. The closed eye environment is more inflammatory than previously thought and is relevant to understanding ocular homeostasis.
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Affiliation(s)
- Cameron K Postnikoff
- School of Optometry, University of Alabama at Birmingham, Birmingham, Alabama, United States
| | - Kelly K Nichols
- School of Optometry, University of Alabama at Birmingham, Birmingham, Alabama, United States
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Eördögh R, Jakab C, Papp R, Tichy A, Nell B. Density and distribution of feline conjunctival goblet cells. J Feline Med Surg 2017; 19:1048-1054. [PMID: 27765834 PMCID: PMC11110988 DOI: 10.1177/1098612x16673000] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Objectives The objective of this study was to examine the density and distribution of goblet cells (GCs) in the feline conjunctiva and to investigate a potential effect of age and sex on GC density (GCD). Methods Thirty-nine eyes of 21 cats euthanased for reasons unrelated to this study were used. Fixed upper and lower eyelid and bulbar conjunctiva were divided into nasal and temporal regions. The third eyelid was excised and investigated separately. Samples were embedded in paraffin wax; sections were stained with periodic acid-Schiff reaction and analysed with light microscopy. To determine the topographic distribution of GCs, each region was subdivided into the marginal, palpebral and bulbar zone. In each zone 200 epithelial cells, including GCs, were counted. Goblet cell index was defined as a percentage of the epithelial cells. Results The palpebral zone of both eyelids contained significantly ( P <0.001) more GCs (27.5-32.0%) than the marginal or bulbar areas. The highest GCD was found in the nasal palpebral zone of the upper eyelid (32.0%). Marginal and bulbar sites contained fewer numbers of GCs (2.6-10.0%). The lowest GCD was detected in the nasal bulbar zone of the lower eyelid (2.6%). Overall the nasal region contained significantly ( P = 0.036) more GCs than the temporal region, but there was no significant difference in GCD between the upper and lower eyelids. Correlation analysis did not show any effect of age or sex on GC counts. Conclusions and relevance GCD in the palpebral zones and on the anterior surface of the third eyelid was highest; the lowest density was found in the bulbar zones of the lower eyelid and in the marginal zones of both eyelids. Overall, higher GCD was found in the cat than in other species. Age and sex have no effect on GCD.
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Affiliation(s)
- Réka Eördögh
- Department for Companion Animals and Horses, University of Veterinary Medicine Vienna, Vienna, Austria
| | - Csaba Jakab
- Department of Pathology, University of Veterinary Medicine, Budapest, Hungary
| | - Renáta Papp
- Department of Pathology, University of Veterinary Medicine, Budapest, Hungary
| | - Alexander Tichy
- Department of Biomedical Sciences, University of Veterinary Medicine Vienna, Vienna, Austria
| | - Barbara Nell
- Department for Companion Animals and Horses, University of Veterinary Medicine Vienna, Vienna, Austria
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Abstract
The members of the Tear Film Subcommittee reviewed the role of the tear film in dry eye disease (DED). The Subcommittee reviewed biophysical and biochemical aspects of tears and how these change in DED. Clinically, DED is characterized by loss of tear volume, more rapid breakup of the tear film and increased evaporation of tears from the ocular surface. The tear film is composed of many substances including lipids, proteins, mucins and electrolytes. All of these contribute to the integrity of the tear film but exactly how they interact is still an area of active research. Tear film osmolarity increases in DED. Changes to other components such as proteins and mucins can be used as biomarkers for DED. The Subcommittee recommended areas for future research to advance our understanding of the tear film and how this changes with DED. The final report was written after review by all Subcommittee members and the entire TFOS DEWS II membership.
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Age-related spontaneous lacrimal keratoconjunctivitis is accompanied by dysfunctional T regulatory cells. Mucosal Immunol 2017; 10:743-756. [PMID: 27706128 PMCID: PMC5380589 DOI: 10.1038/mi.2016.83] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2015] [Accepted: 08/29/2016] [Indexed: 02/04/2023]
Abstract
In both humans and animal models, the development of Sjögren syndrome (SS) and non-SS keratoconjunctivitis sicca (KCS) increases with age. Here, we investigated the ocular surface and lacrimal gland (LG) phenotype of NOD.B10.H2b mice at 7-14, 45-50, and 96-100 weeks. Aged mice develop increased corneal permeability, CD4+ T-cell infiltration, and conjunctival goblet cell loss. Aged mice have LG atrophy with increased lymphocyte infiltration and inflammatory cytokine levels. An increase in the frequency of CD4+Foxp3+ T regulatory cells (Tregs) was observed with age in the cervical lymph node (CLN), spleen, and LG. These CD4+CD25+ cells lose suppressive ability, while maintaining expression of Foxp3 (forkhead box P3) and producing interleukin-17 (IL-17) and interferon-γ (IFN-γ). An increase of Foxp3+IL-17+ or Foxp3+IFN-γ+ cells was observed in the LG and LG-draining CLN. In adoptive transfer experiments, recipients of either purified Tregs or purified T effector cells from aged donors developed lacrimal keratoconjunctivitis, whereas recipients of young Tregs or young T effector cells failed to develop disease. Overall, these results suggest inflammatory cytokine-producing CD4+Foxp3+ cells participate in the pathogenesis of age-related ocular surface disease.
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Sexual dimorphic function of IL-17 in salivary gland dysfunction of the C57BL/6.NOD-Aec1Aec2 model of Sjögren's syndrome. Sci Rep 2016; 6:38717. [PMID: 27958291 PMCID: PMC5153841 DOI: 10.1038/srep38717] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2016] [Accepted: 11/15/2016] [Indexed: 02/04/2023] Open
Abstract
Interleukin (IL)-17 is one of the critical inflammatory cytokines that plays a direct role in development of Sjögren’s syndrome (SjS), a systemic autoimmune disease characterized by a progressive chronic attack against the exocrine glands. The expression levels of IL-17 are correlated with a number of essential clinical parameters such as focus score and disease duration in human patients. Significantly immunological differences of Th17 cells were detected at the onset of clinical disease in female SjS mice compared to males. To further define the role of IL-17 in SjS and elucidate its involvement in the sexual dimorphism, we examined the systemic effect of IL-17 by genetically ablating Il-17 in the C57BL/6.NOD-Aec1Aec2, spontaneous SjS murine model. The results indicate that IL-17 is a potent inflammatory molecule in the induction of chemoattractants, cytokines, and glandular apoptosis in males and females. Elimination of IL-17 reduced sialadenitis more drastically in females than males. IL-17 is highly involved in modulating Th2 cytokines and altering autoantibody profiles which has a greater impact on changing plasma cells and germinal center B cell populations in females than males. The result supports a much more important role for IL-17 and demonstrates the sexual dimorphic function of IL-17 in SjS.
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Review: The Lacrimal Gland and Its Role in Dry Eye. J Ophthalmol 2016; 2016:7542929. [PMID: 27042343 PMCID: PMC4793137 DOI: 10.1155/2016/7542929] [Citation(s) in RCA: 77] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2015] [Accepted: 02/04/2016] [Indexed: 01/15/2023] Open
Abstract
The human tear film is a 3-layered coating of the surface of the eye and a loss, or reduction, in any layer of this film may result in a syndrome of blurry vision and burning pain of the eyes known as dry eye. The lacrimal gland and accessory glands provide multiple components to the tear film, most notably the aqueous. Dysfunction of these glands results in the loss of aqueous and other products required in ocular surface maintenance and health resulting in dry eye and the potential for significant surface pathology. In this paper, we have reviewed products of the lacrimal gland, diseases known to affect the gland, and historical and emerging dry eye therapies targeting lacrimal gland dysfunction.
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Abstract
PURPOSE OF REVIEW Sjögren's syndrome affects exocrine glands leading to a dry mouth and dry eyes. Dry eye manifestations can precede the diagnosis of Sjögren's syndrome by many years. Innumerous spontaneous and inducible Sjögren's syndrome models have been used to study the pathogenesis of Sjögren's syndrome. This review focuses on recent human data, ocular and extraglandular manifestations of animal models, what is known, what is still unknown and how we need to look, and their correlation correspondence to human disease. RECENT FINDINGS Hallmarks of dry eye in Sjögren's syndrome include increased corneal staining, goblet cell loss and low tear volume. Confocal microscopy and impression cytology are able to clarify new markers of the ocular disease. Extraglandular manifestations should be an alert more severe complications in the eye. Some models have strong sex and exocrine gland predilection, whereas aging generally worsens the disease phenotype. Although most models do not display a significant increase in corneal staining or tear secretion impairment, conjunctival infiltration and decrease in goblet cells are frequently seen. SUMMARY We have seen great advances in the role of inflammation in ocular, oral and extra-glandular manifestations of Sjögren's syndrome. Several mechanisms and mediators of Sjögren's syndrome have been elucidated in animal model studies.
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