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Shih KC, Tong L. The Conjunctival Microbiome and Dry Eye: What We Know and Controversies. Eye Contact Lens 2024; 50:208-211. [PMID: 38345108 DOI: 10.1097/icl.0000000000001077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/19/2023] [Indexed: 04/26/2024]
Abstract
ABSTRACT Dry eye disease is a common multifactorial condition that may be idiopathic or associated with autoimmune conditions, such as Sjogren syndrome. Commensal microorganisms modify immune responses, so it is relevant to understand how they modify such immune-mediated diseases. Microbiota in the gut regulate inflammation in the eye, and conversely, severe inflammation of the ocular surface results in alteration of gut microbiome. The conjunctiva microbiome can be analyzed using 16S or shotgun metagenomics. The amount of microbial DNA in ocular surface mucosa relative to human DNA is limited compared with the case of the intestinal microbiome. There are challenges in defining, harvesting, processing, and analyzing the microbiome in the ocular surface mucosa. Recent studies have shown that the conjunctiva microbiome depends on age, presence of local and systemic inflammation, and environmental factors. Microbiome-based therapy, such as the use of oral probiotics to manage dry eye disease, has initial promising results. Further longitudinal studies are required to investigate the alteration of the conjunctival microbiome after local therapy and surgery.
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Affiliation(s)
- Kendrick C Shih
- Department of Ophthalmology (K.C.S.), The University of Hong Kong; Corneal and External Eye Disease Service (L.T.), Singapore National Eye Center, Singapore; Ocular Surface Research Group (L.T.), Singapore Eye Research Institute, Singapore; and Eye Academic Clinical Program (L.T.), Duke-National University of Singapore, Singapore
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2
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Puertas-Bartolomé M, Gutiérrez-Urrutia I, Teruel-Enrico LL, Duong CN, Desai K, Trujillo S, Wittmann C, Del Campo A. Self-Lubricating, Living Contact Lenses. Adv Mater 2024:e2313848. [PMID: 38583064 DOI: 10.1002/adma.202313848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Revised: 03/04/2024] [Indexed: 04/08/2024]
Abstract
The increasing prevalence of dry eye syndrome in aging and digital societies compromises long-term contact lens (CL) wear and forces users to regular eye drop instillation to alleviate discomfort. Here a novel approach with the potential to improve and extend the lubrication properties of CLs is presented. This is achieved by embedding lubricant-secreting biofactories within the CL material. The self-replenishable reservoirs autonomously produce and release hyaluronic acid (HA), a natural lubrication and wetting agent, long term. The hydrogel matrix regulates the growth of the biofactories and the HA production, and allows the diffusion of nutrients and HA for at least 3 weeks. The continuous release of HA sustainably reduces the friction coefficient of the CL surface. A self-lubricating CL prototype is presented, where the functional biofactories are contained in a functional ring at the lens periphery, outside of the vision area. The device is cytocompatible and fulfils physicochemical requirements of commercial CLs. The fabrication process is compatible with current manufacturing processes of CLs for vision correction. It is envisioned that the durable-by-design approach in living CL could enable long-term wear comfort for CL users and minimize the need for lubricating eye drops.
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Affiliation(s)
- María Puertas-Bartolomé
- INM-Leibniz Institute for New Materials, Campus D2 2, 66123, Saarbrücken, Germany
- Chemistry Department, Saarland University, 66123, Saarbrücken, Germany
| | | | | | - Cao Nguyen Duong
- INM-Leibniz Institute for New Materials, Campus D2 2, 66123, Saarbrücken, Germany
| | - Krupansh Desai
- INM-Leibniz Institute for New Materials, Campus D2 2, 66123, Saarbrücken, Germany
| | - Sara Trujillo
- INM-Leibniz Institute for New Materials, Campus D2 2, 66123, Saarbrücken, Germany
| | - Christoph Wittmann
- Institute for Systems Biotechnology, Saarland University, Campus A1 5, 66123, Saarbrücken, Germany
| | - Aránzazu Del Campo
- INM-Leibniz Institute for New Materials, Campus D2 2, 66123, Saarbrücken, Germany
- Chemistry Department, Saarland University, 66123, Saarbrücken, Germany
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3
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Beatty CJ, Ruiz-Lozano RE, Quiroga-Garza ME, Perez VL, Jester JV, Saban DR. The Yin and Yang of non-immune and immune responses in meibomian gland dysfunction. Ocul Surf 2024; 32:81-90. [PMID: 38224775 DOI: 10.1016/j.jtos.2024.01.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2023] [Revised: 01/04/2024] [Accepted: 01/12/2024] [Indexed: 01/17/2024]
Abstract
Meibomian gland dysfunction (MGD) is a leading cause of dry eye disease and one of the most common ophthalmic conditions encountered in eye clinics worldwide. These holocrine glands are situated in the eyelid, where they produce specialized lipids, or meibum, needed to lubricate the eye surface and slow tear film evaporation - functions which are critical to preserving high-resolution vision. MGD results in tear instability, rapid tear evaporation, changes in local microflora, and dry eye disease, amongst other pathological entities. While studies identifying the mechanisms of MGD have generally focused on gland obstruction, we now know that age is a major risk factor for MGD that is associated with abnormal cell differentiation and renewal. It is also now appreciated that immune-inflammatory disorders, such as certain autoimmune diseases and atopy, may trigger MGD, as demonstrated through a T cell-driven neutrophil response. Here, we independently discuss the underlying roles of gland and immune related factors in MGD, as well as the integration of these two distinct mechanisms into a unified perspective that may aid future studies. From this unique standpoint, we propose a revised model in which glandular dysfunction and immunopathogenic pathways are not primary versus secondary contributors in MGD, but are fluid, interactive, and dynamic, which we likened to the Yin and Yang of MGD.
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Affiliation(s)
- Cole J Beatty
- Department of Integrative Immunobiology, Duke University School of Medicine, Durham, NC, USA; Duke Eye Center, Duke University School of Medicine, Foster Center for Ocular Immunology at Duke Eye Center, Durham, NC, USA
| | - Raul E Ruiz-Lozano
- Duke Eye Center, Duke University School of Medicine, Foster Center for Ocular Immunology at Duke Eye Center, Durham, NC, USA
| | - Manuel E Quiroga-Garza
- Duke Eye Center, Duke University School of Medicine, Foster Center for Ocular Immunology at Duke Eye Center, Durham, NC, USA
| | - Victor L Perez
- Duke Eye Center, Duke University School of Medicine, Foster Center for Ocular Immunology at Duke Eye Center, Durham, NC, USA.
| | - James V Jester
- Department of Ophthalmology and Biomedical Engineering, Gavin Herbert Eye Institute, University of California Irvine, Irvine, CA, USA.
| | - Daniel R Saban
- Department of Integrative Immunobiology, Duke University School of Medicine, Durham, NC, USA; Duke Eye Center, Duke University School of Medicine, Foster Center for Ocular Immunology at Duke Eye Center, Durham, NC, USA.
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Zhu W, Xu X, Nagarajan V, Guo J, Peng Z, Zhang A, Liu J, Mattapallil MJ, Jittayasothorn Y, Horai R, Leger AJS, Caspi RR. TLR2 Supports γδ T cell IL-17A Response to ocular surface commensals by Metabolic Reprogramming. bioRxiv 2024:2024.04.01.587519. [PMID: 38712203 PMCID: PMC11071315 DOI: 10.1101/2024.04.01.587519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2024]
Abstract
The ocular surface is a mucosal barrier tissue colonized by commensal microbes, which tune local immunity by eliciting IL-17 from conjunctival γδ T cells to prevent pathogenic infection. The commensal Corynebacterium mastitidis ( C. mast ) elicits protective IL-17 responses from conjunctival Vγ4 T cells through a combination of γδ TCR ligation and IL-1 signaling. Here, we identify Vγ6 T cells as a major C. mast -responsive subset in the conjunctiva and uncover its unique activation requirements. We demonstrate that Vγ6 cells require not only extrinsic (via dendritic cells) but also intrinsic TLR2 stimulation for optimal IL-17A response. Mechanistically, intrinsic TLR2 signaling was associated with epigenetic changes and enhanced expression of genes responsible for metabolic shift to fatty acid oxidation to support Il17a transcription. We identify one key transcription factor, IκBζ, which is upregulated by TLR2 stimulation and is essential for this program. Our study highlights the importance of intrinsic TLR2 signaling in driving metabolic reprogramming and production of IL-17A in microbiome-specific mucosal γδ T cells. Summary The ocular commensal Corynebacterium mastitidis ( C. mast ) induces the IL-17 responses from γδ T cells by activating TLR2 signaling. γδ T cell-intrinsic TLR2 stimulation promotes fatty acid oxidation and increases IL-17A transcription, favoring IL-17A responses. Highlights (1) TLR2-deficient mice exhibit reduced γδ T cell responses to ocular commensal bacteria.(2) γδ T cell-intrinsic TLR2 deficiency causes defects of fatty acid oxidation and IL-17A production in a γδ subset-specific manner.(3) The transcription factor, IκBζ is upregulated by TLR2 stimulation and supports γδ IL-17A production through fatty acid oxidation.
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Affiliation(s)
- Wenjie Zhu
- Laboratory of Immunology, NEI, NIH Bethesda MD 20892, USA
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, 510060 China
| | - Xiaoyan Xu
- Laboratory of Immunology, NEI, NIH Bethesda MD 20892, USA
| | | | - Jing Guo
- Department of Microbiology and Immunology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Zixuan Peng
- Laboratory of Immunology, NEI, NIH Bethesda MD 20892, USA
| | - Amy Zhang
- Laboratory of Immunology, NEI, NIH Bethesda MD 20892, USA
| | - Jie Liu
- Laboratory of Immunology, NEI, NIH Bethesda MD 20892, USA
- Current address: Schepens Eye Research Institute, Massachusetts Eye and Ear Infirmary, Harvard Medical School, Boston, MA, 02114
| | | | | | - Reiko Horai
- Laboratory of Immunology, NEI, NIH Bethesda MD 20892, USA
| | - Anthony J. St. Leger
- University of Pittsburgh School of Medicine, Departments of Ophthalmology and Immunology, Pittsburgh, PA 15213, USA
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Naqvi M, Fineide F, Utheim TP, Charnock C. Culture- and non-culture-based approaches reveal unique features of the ocular microbiome in dry eye patients. Ocul Surf 2024; 32:123-129. [PMID: 38354907 DOI: 10.1016/j.jtos.2024.02.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 01/24/2024] [Accepted: 02/11/2024] [Indexed: 02/16/2024]
Abstract
PURPOSE The purpose of this study was to investigate the ocular microbiome in individuals with dry eye disease and to identify features of their ocular microbiome of possible health and diagnostic significance. METHODS Conjunctival samples were collected from both eyes in duplicate from 91 individuals (61 dry eye, 30 healthy) and used for both culture-dependent and culture-independent analyses. Samples were either analysed using next generation sequencing (V3-V4 16S rDNA) or inoculated on a wide range of agar types and grown under a broad range of conditions to maximize recovery. Isolates were identified by partial sequencing of the 16S rDNA and rpoB genes and tested for antibiotic susceptibility. We applied a L2-regularized logistic regression model on the next generation sequencing data to investigate any potential association between severe dry eye disease and the ocular microbiome. RESULTS Culture-dependent analysis showed the highest number of colony forming units in healthy individuals. The majority of isolates recovered from the samples were Corynebacterium, Micrococcus sp., Staphylococcus epidermidis, and Cutibacterium acnes. Culture independent analysis revealed 24 phyla, of which Actinobacteria, Firmicutes and Proteobacteria were the most abundant. Over 405 genera were detected of which Corynebacterium was the most dominant, followed by Staphylococcus and Cutibacterium. The L2-regularized logistic regression model indicated that Blautia and Corynebacterium sp. may be associated with severe DED. CONCLUSIONS Our study indicates that the ocular microbiome has characteristic features in severe DED patients. Certain Corynebacterium species and Blautia are of particular interest for future studies.
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Affiliation(s)
- Maria Naqvi
- Department of Life Sciences and Health, Faculty of Health Sciences, Oslo Metropolitan University, Postbox 4, St. Olavs Plass, 0130, Oslo, Norway.
| | - Fredrik Fineide
- Department of Computer Science, Oslo Metropolitan University, Norway; Department of Medical Biochemistry, Oslo University Hospital, Norway; The Norwegian Dry Eye Clinic, Ole Vigs Gate 32 E, 0366, Oslo, Norway
| | - Tor Paaske Utheim
- Department of Medical Biochemistry, Oslo University Hospital, Norway; The Norwegian Dry Eye Clinic, Ole Vigs Gate 32 E, 0366, Oslo, Norway
| | - Colin Charnock
- Department of Life Sciences and Health, Faculty of Health Sciences, Oslo Metropolitan University, Postbox 4, St. Olavs Plass, 0130, Oslo, Norway
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Liang C, Wang L, Wang X, Jia Y, Xie Q, Zhao L, Yuan H. Altered ocular surface microbiota in obesity: a case-control study. Front Cell Infect Microbiol 2024; 14:1356197. [PMID: 38533385 PMCID: PMC10963539 DOI: 10.3389/fcimb.2024.1356197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Accepted: 02/26/2024] [Indexed: 03/28/2024] Open
Abstract
Purpose This study aimed to investigate the composition of ocular surface microbiota in patients with obesity. Methods This case-control study, spanning from November 2020 to March 2021 at Henan Provincial People's Hospital, involved 35 patients with obesity and an equivalent number of age and gender-matched healthy controls. By employing 16S rRNA sequencing, this study analyzed the differences in ocular surface microbiota between the two groups. The functional prediction analysis of the ocular surface microbiota was conducted using PICRUSt2. Results The alpha diversity showed no notable differences in the richness or evenness of the ocular surface microbiota when comparing patients with obesity to healthy controls (Shannon index, P=0.1003). However, beta diversity highlighted significant variances in the microbiota composition of these two groups (ANOSIM, P=0.005). LEfSe analysis revealed that the relative abundances of Delftia, Cutibacterium, Aquabacterium, Acidovorax, Caulobacteraceae unclassified, Comamonas and Porphyromonas in patients with obesity were significantly increased (P<0.05). Predictive analysis using PICRUSt2 highlighted a significant enhancement in certain metabolic pathways in patients with obesity, notably xenobiotics metabolism via cytochrome P450 (CYP450), lipid metabolism, and the oligomerization domain (NOD)-like receptor signaling pathway (P<0.05). Conclusions Patients with obesity exhibit a distinct ocular surface core microbiome. The observed variations in this microbiome may correlate with increased activity in CYP450, changes in lipid metabolism, and alterations in NOD-like receptor signaling pathways.
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Affiliation(s)
- Chenghong Liang
- Department of Endocrinology, Zhengzhou University People’s Hospital, Zhengzhou, China
- Department of Endocrinology, Henan Provincial People’s Hospital, Zhengzhou, China
| | - Limin Wang
- Department of Endocrinology, Zhengzhou University People’s Hospital, Zhengzhou, China
- Department of Endocrinology, Henan Provincial People’s Hospital, Zhengzhou, China
| | - Xiudan Wang
- Department of Endocrinology, Zhengzhou University People’s Hospital, Zhengzhou, China
- Department of Endocrinology, Henan Provincial People’s Hospital, Zhengzhou, China
| | - Yifan Jia
- Department of Endocrinology, Zhengzhou University People’s Hospital, Zhengzhou, China
- Department of Endocrinology, Henan Provincial People’s Hospital, Zhengzhou, China
| | - Qinyuan Xie
- Department of Endocrinology, Zhengzhou University People’s Hospital, Zhengzhou, China
- Department of Endocrinology, Henan Provincial People’s Hospital, Zhengzhou, China
| | - Lingyun Zhao
- Department of Endocrinology, Zhengzhou University People’s Hospital, Zhengzhou, China
- Department of Endocrinology, Henan Provincial People’s Hospital, Zhengzhou, China
| | - Huijuan Yuan
- Department of Endocrinology, Zhengzhou University People’s Hospital, Zhengzhou, China
- Department of Endocrinology, Henan Provincial People’s Hospital, Zhengzhou, China
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Labetoulle M, Baudouin C, Benitez Del Castillo JM, Rolando M, Rescigno M, Messmer EM, Aragona P. How gut microbiota may impact ocular surface homeostasis and related disorders. Prog Retin Eye Res 2024:101250. [PMID: 38460758 DOI: 10.1016/j.preteyeres.2024.101250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 03/01/2024] [Accepted: 03/04/2024] [Indexed: 03/11/2024]
Abstract
Changes in the bacterial flora in the gut, also described as gut microbiota, are readily acknowledged to be associated with several systemic diseases, especially those with an inflammatory, neuronal, psychological or hormonal factor involved in the pathogenesis and/or the perception of the disease. Maintaining ocular surface homeostasis is also based on all these four factors, and there is accumulating evidence in the literature on the relationship between gut microbiota and ocular surface diseases. The mechanisms involved are mostly interconnected due to the interaction of central and peripheral neuronal networks, inflammatory effectors and the hormonal system. A better understanding of the influence of the gut microbiota on the maintenance of ocular surface homeostasis, and on the onset or persistence of ocular surface disorders could bring new insights and help elucidate the epidemiology and pathology of ocular surface dynamics in health and disease. Revealing the exact nature of these associations could be of paramount importance for developing a holistic approach using highly promising new therapeutic strategies targeting ocular surface diseases.
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Affiliation(s)
- Marc Labetoulle
- Ophthalmology Départment, Hopital Bicetre, APHP, Université Paris-Saclay, IDMIT Infrastructure, Fontenay-aux-Roses Cedex, France; Hôpital National de la Vision des Quinze, Vingts, IHU ForeSight, Paris Saclay University, Paris, France.
| | - Christophe Baudouin
- Hôpital National de la Vision des Quinze, Vingts, IHU ForeSight, Paris Saclay University, Paris, France
| | - Jose M Benitez Del Castillo
- Departamento de Oftalmología, Hospital Clínico San Carlos, Clínica Rementeria, Instituto Investigaciones Oftalmologicas Ramon Castroviejo, Universidad Complutense, Madrid, Spain
| | - Maurizio Rolando
- Ocular Surface and Dry Eye Center, ISPRE Ophthalmics, Genoa, Italy
| | - Maria Rescigno
- IRCCS Humanitas Research Hospital, via Manzoni 56, Rozzano, 20089, Milan, Italy; Department of Biomedical Sciences, Humanitas University, Via Rita Levi Montalcini, Pieve Emanuele, 20090, MI, Italy
| | | | - Pasquale Aragona
- Department of Biomedical Sciences, Ophthalmology Clinic, University of Messina, Messina, Italy
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Fukui C, Yamana S, Xue Y, Shirane M, Tsutsui H, Asahara K, Yoshitomi K, Ito T, Lestari T, Hasegawa E, Yawata N, Takeda A, Sonoda KH, Shibata K. Functions of mucosal associated invariant T cells in eye diseases. Front Immunol 2024; 15:1341180. [PMID: 38440736 PMCID: PMC10911089 DOI: 10.3389/fimmu.2024.1341180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Accepted: 01/29/2024] [Indexed: 03/06/2024] Open
Abstract
Mucosal-associated invariant T (MAIT) cells are a unique subset of T cells that recognizes metabolites derived from the vitamin B2 biosynthetic pathway. Since the identification of cognate antigens for MAIT cells, knowledge of the functions of MAIT cells in cancer, autoimmunity, and infectious diseases has been rapidly expanding. Recently, MAIT cells have been found to contribute to visual protection against autoimmunity in the eye. The protective functions of MAIT cells are induced by T-cell receptor (TCR)-mediated activation. However, the underlying mechanisms remain unclear. Thus, this mini-review aims to discuss our findings and the complexity of MAIT cell-mediated immune regulation in the eye.
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Affiliation(s)
- Chihiro Fukui
- Department of Ophthalmology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Satoshi Yamana
- Department of Ophthalmology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Yanqi Xue
- Department of Ophthalmology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Mariko Shirane
- Department of Ophthalmology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Hiroki Tsutsui
- Department of Ophthalmology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Kenichiro Asahara
- Department of Ophthalmology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Keiko Yoshitomi
- Department of Ophthalmology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Takako Ito
- Department of Ophthalmology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Tantri Lestari
- Department of Ophthalmology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Eiichi Hasegawa
- Department of Ophthalmology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Nobuyo Yawata
- Department of Ocular Pathology and Imaging Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Atsunobu Takeda
- Department of Ophthalmology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Koh-Hei Sonoda
- Department of Ophthalmology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Kensuke Shibata
- Department of Ocular Pathology and Imaging Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
- Department of Microbiology and Immunology, Graduate School of Medicine, Yamaguchi University, Ube, Japan
- Department of Molecular Immunology, Research Institute for Microbial Diseases, Osaka University, Suita, Japan
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Chowdhary A, Van Gelder RN, Sundararajan M. Methodologic Considerations for Studying the Ocular Surface Microbiome. Ophthalmol Sci 2023; 3:100408. [PMID: 38025161 PMCID: PMC10654231 DOI: 10.1016/j.xops.2023.100408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Revised: 09/26/2023] [Accepted: 09/28/2023] [Indexed: 12/01/2023]
Abstract
The ocular surface microbiome, unlike that of the skin or gut, has not been well characterized. Culture experiments historically suggested a nearly sterile ocular surface, but initial application of molecular methods such as 16S ribosomal RNA and high-throughput sequencing demonstrated a surprisingly rich ocular surface microbiome. However, a major limitation in studying such a low-biomass niche is the potential for artifactual results when amplification-based techniques such as ribosomal polymerase chain reaction and shotgun sequencing are used. It will be essential to establish standards across the field for sample collection, positive and negative controls, and limitation of contamination in both the laboratory setting and computational analysis. New developments in ocular microbiome research, including the generation of reference reagents and fluoroscopic imaging techniques, provide improved means to validate sequencing results and to visualize complex interactions between host cells and bacteria. Through more thorough characterization of the ocular surface microbiome, the connections between a dysregulated surface and ophthalmic disease may be better understood. Financial Disclosures Proprietary or commercial disclosure may be found in the Footnotes and Disclosures at the end of this article.
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Affiliation(s)
- Apoorva Chowdhary
- Department of Ophthalmology, University of Washington, Seattle, Washington
| | - Russell N. Van Gelder
- Department of Ophthalmology, University of Washington, Seattle, Washington
- Roger and Angie Karalis Johnson Retina Center, Seattle, Washington
- Department of Biological Structure, University of Washington, Seattle, Washington
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, Washington
| | - Miel Sundararajan
- Department of Ophthalmology, University of Washington, Seattle, Washington
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Zilliox MJ, Bouchard CS. The Microbiome, Ocular Surface, and Corneal Disorders. Am J Pathol 2023; 193:1648-1661. [PMID: 37236506 DOI: 10.1016/j.ajpath.2023.05.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Revised: 04/25/2023] [Accepted: 05/09/2023] [Indexed: 05/28/2023]
Abstract
The ocular surface microbiome is an emerging field of study that seeks to understand how the community of microorganisms found on the ocular surface may help maintain homeostasis or can potentially lead to disease and dysbiosis. Initial questions include whether the organisms detected on the ocular surface inhabit that ecological niche and, if so, whether there exists a core microbiome found in most or all healthy eyes. Many questions have emerged around whether novel organisms and/or a redistribution of organisms play a role in disease pathogenesis, response to therapies, or convalescence. Although there is much enthusiasm about this topic, the ocular surface microbiome is a new field with many technical challenges. These challenges are discussed in this review as well as a need for standardization to adequately compare studies and advance the field. In addition, this review summarizes the current research on the microbiome of various ocular surface diseases and how these findings may impact treatments and clinical decision-making.
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Affiliation(s)
- Michael J Zilliox
- Department of Ophthalmology, Loyola University Medical Center, Maywood, Illinois
| | - Charles S Bouchard
- Department of Ophthalmology, Loyola University Medical Center, Maywood, Illinois.
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Jia B, Tang L, Liu H, Zhu Y, Chen W, Chen Q, Li J, Zhong M, Yin A. Alterations and potential roles of microbial population of pregnant mouse saliva and amniotic fluid. Am J Reprod Immunol 2023; 90:e13782. [PMID: 37881125 DOI: 10.1111/aji.13782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Revised: 08/15/2023] [Accepted: 09/18/2023] [Indexed: 10/27/2023] Open
Abstract
PROBLEM Prenatal exposure to intrauterine inflammation (IUI) is a crucial event in PTB pathophysiology. However, the relationship between microflora and PTB is not fully elucidated. METHOD OF STUDY In this study, we established an intrauterine inflammation mouse model via LPS intrauterine injection. The saliva and amniotic fluid were collected for 16s RNA gene sequencing. The levels of TNF-α and IL-1β in mouse amniotic fluid were determined by ELISA assays. RESULTS Up to 60% of the operational taxonomic units (OTUs) in the saliva and amniotic fluid of PBS-treated mice were overlapped. LPS treatment-induced changes in the abundance of oral and amniotic fluid microorganisms. Both immune-associated probiotics, salivarius and mastitidis, were still detected in saliva (at significantly increased levels) after LPS-induced intrauterine inflammation and almost no probiotics of any type were detected in amniotic fluid, suggesting that the uterine cavity seems to be more susceptible to LPS compared to the oral cavity. Moreover, the abundance of pathogenic bacteria Escherichia coli was increased in both saliva and amniotic fluid after LPS treatment. The level of TNF-α and IL-1β in amniotic fluid is positively related to the amniotic fluid E. coli abundance. CONCLUSIONS The microbial composition of saliva and amniotic fluid of pregnant mice was similar. LPS-induced intrauterine inflammation decreased the consistency of microbial composition in mouse saliva and amniotic fluid, increased the abundance of E. coli in saliva and amniotic fluid, and decreased the abundance of immune-associated probiotics, especially in amniotic fluid.
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Affiliation(s)
- Bei Jia
- Department of Obstetrics and Gynecology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, PR China
| | - Lijun Tang
- Department of Obstetrics and Gynecology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, PR China
| | - Huibing Liu
- Department of Obstetrics and Gynecology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, PR China
| | - Yan Zhu
- Department of Obstetrics and Gynecology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, PR China
| | - Wenqian Chen
- Department of Obstetrics and Gynecology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, PR China
| | - Qian Chen
- Department of Obstetrics and Gynecology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, PR China
| | - Jing Li
- Department of Obstetrics and Gynecology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, PR China
| | - Mei Zhong
- Department of Obstetrics and Gynecology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, PR China
| | - Ailan Yin
- Department of Obstetrics and Gynecology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, PR China
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An Q, Zou H. Ocular surface microbiota dysbiosis contributes to the high prevalence of dry eye disease in diabetic patients. Crit Rev Microbiol 2023; 49:805-814. [PMID: 36409575 DOI: 10.1080/1040841x.2022.2142090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 10/02/2022] [Accepted: 10/26/2022] [Indexed: 11/23/2022]
Abstract
People with diabetes mellitus (DM) are at an increased risk for developing dry eye disease (DED). However, the mechanisms underlying this phenomenon remain unclear. Recent studies have found that the ocular surface microbiota (OSM) differs significantly between patients with DED and healthy people, suggesting that OSM dysbiosis may contribute to the pathogenesis of DED. This hypothesis provides a new possible explanation for why diabetic patients have a higher prevalence of DED than healthy people. The high-glucose environment and the subsequent pathological changes on the ocular surface can cause OSM dysbiosis. The unbalanced microbiota then promotes ocular surface inflammation and alters tear composition, which disturbs the homeostasis of the ocular surface. This "high glucose-OSM dysbiosis" pathway in the pathogenesis of DED with DM (DM-DED) is discussed in this review.
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Affiliation(s)
- Qingyu An
- Department of Ophthalmology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Shanghai Eye Diseases Prevention & Treatment Center, Shanghai Eye Hospital, Shanghai, China
| | - Haidong Zou
- Department of Ophthalmology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Shanghai Eye Diseases Prevention & Treatment Center, Shanghai Eye Hospital, Shanghai, China
- Shanghai Key Laboratory of Fundus Diseases, Shanghai, China
- National Clinical Research Center for Eye Diseases, Shanghai, China
- Shanghai Engineering Center for Precise Diagnosis and Treatment of Eye Diseases, Shanghai, China
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13
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Handsley-Davis M, Anderson MZ, Bader AC, Ehau-Taumaunu H, Fox K, Kowal E, Weyrich LS. Microbiome ownership for Indigenous peoples. Nat Microbiol 2023; 8:1777-1786. [PMID: 37770744 DOI: 10.1038/s41564-023-01470-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Accepted: 08/11/2023] [Indexed: 09/30/2023]
Abstract
Several studies have reported increased microbial diversity, or distinct microbial community compositions, in the microbiomes of Indigenous peoples around the world. However, there is a widespread failure to include Indigenous cultures and perspectives in microbiome research programmes, and ethical issues pertaining to microbiome research involving Indigenous participants have not received enough attention. We discuss the benefits and risks arising from microbiome research involving Indigenous peoples and analyse microbiome ownership as an ethical concept in this context. We argue that microbiome ownership represents an opportunity for Indigenous peoples to steward and protect their resident microbial communities at every stage of research.
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Affiliation(s)
- Matilda Handsley-Davis
- School of Biological Sciences, University of Adelaide, Adelaide, South Australia, Australia
- ARC Centre of Excellence for Australian Biodiversity and Heritage, University of Wollongong, Wollongong, New South Wales, Australia
| | - Matthew Z Anderson
- Department of Microbiology, The Ohio State University, Columbus, OH, USA
- Department of Microbial Infection and Immunity, The Ohio State University, Columbus, OH, USA
- Center for Genomic Science Innovation, University of Wisconsin-Madison, Madison, WI, USA
- Laboratory of Genetics, University of Wisconsin-Madison, Madison, WI, USA
| | - Alyssa C Bader
- Department of Anthropology, McGill University, Montreal, Quebec, Canada
| | - Hanareia Ehau-Taumaunu
- Department of Plant Pathology and Environmental Microbiology, The Pennsylvania State University, State College, PA, USA
| | - Keolu Fox
- Department of Anthropology, Global Health Program, and Indigenous Futures Institute, University of California, San Diego, CA, USA
| | - Emma Kowal
- ARC Centre of Excellence for Australian Biodiversity and Heritage, University of Wollongong, Wollongong, New South Wales, Australia
- Alfred Deakin Institute for Citizenship and Globalisation, Deakin University, Melbourne, Victoria, Australia
| | - Laura S Weyrich
- School of Biological Sciences, University of Adelaide, Adelaide, South Australia, Australia.
- ARC Centre of Excellence for Australian Biodiversity and Heritage, University of Wollongong, Wollongong, New South Wales, Australia.
- Department of Anthropology and Huck Institutes of Life Sciences, The Pennsylvania State University, State College, PA, USA.
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14
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Cavuoto KM, Galor A, Zhu AY. Role of the ocular surface microbiome in allergic eye diseases. Curr Opin Allergy Clin Immunol 2023; 23:376-382. [PMID: 37459276 DOI: 10.1097/aci.0000000000000930] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/31/2023]
Abstract
PURPOSE OF REVIEW The purpose of this review is to provide an update on emerging literature on the role of the ocular surface microbiome (OSM) in allergic eye diseases. RECENT FINDINGS Findings in the literature suggest that the ocular surface microbiome plays a role in the pathophysiology and course of allergic disease of the ocular surface. SUMMARY Knowledge regarding the role of the ocular surface microbiome in allergic disease is important to guide development of targets for future therapeutic interventions.
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Affiliation(s)
- Kara M Cavuoto
- Bascom Palmer Eye Institute, University of Miami Miller School of Medicine
| | - Anat Galor
- Bascom Palmer Eye Institute, University of Miami Miller School of Medicine
- Miami Veterans Administration Medical Center, Miami, Florida, USA
| | - Angela Y Zhu
- Bascom Palmer Eye Institute, University of Miami Miller School of Medicine
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15
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Ozkan J, Majzoub ME, Coroneo M, Thomas T, Willcox M. Ocular microbiome changes in dry eye disease and meibomian gland dysfunction. Exp Eye Res 2023; 235:109615. [PMID: 37586456 DOI: 10.1016/j.exer.2023.109615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2023] [Revised: 07/17/2023] [Accepted: 08/11/2023] [Indexed: 08/18/2023]
Abstract
The most common and chronic ocular problem of aging is dry eye disease (DED) and the associated condition of meibomian gland dysfunction (MGD). The resident ocular surface bacteria may have a role in maintaining homeostasis and perturbation may contribute to disease development. The aim of this study was to compare the microbiomes of the conjunctiva and eyelid margin in humans with mild and moderate DED and controls using 16 S rRNA gene sequencing. The conjunctiva and lid margin of three cohorts (N = 60; MGD, MGD with lacrimal dysfunction [MGD + LD] and controls) were swabbed bilaterally three times over three months. Microbial communities were analysed by extracting DNA and sequencing the V3-V4 region of the 16 S ribosomal RNA gene using the Illumina MiSeq platform. Sequences were quality filtered, clustered into amplicon sequence variants (ASVs) using UNOISE algorithm and taxonomically classified using a Bayesian Last Common Ancestor (BCLA) algorithm against the GTDB 2207 database. The overall microbial communities of the MGD, MGD + LD and control groups were significantly different from each other (P = 0.001). The MGD and MGD + LD dry eye groups showed greater variability between individuals compared to the control (PERMDISP, P < 0.01). There was decreased richness and diversity in females compared to males for the conjunctiva (P < 0.04) and eyelid margin (P < 0.018). The conjunctiva in the MGD + LD group had more abundant Pseudomonas azotoformans, P. oleovorans and Caballeronia zhejiangensis compared to MGD and control (P < 0.05), while the MGD group had more abundant Corynebacterium macginleyi and C. kroppenstedtii compared to control (P < 0.05). The lid margin in MGD was more abundant in C. macginleyi, C. accolens, and C. simulans compared to the MGD + LD and control (P < 0.05). There were differences in the overall microbial community composition and certain taxa, including increased levels of lipophilic bacteria, on the conjunctiva and eyelid margin in mild to moderate DED/MGD compared to controls. DED/MGD was also associated with a reduced bacterial richness and diversity in females.
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Affiliation(s)
- Jerome Ozkan
- School of Optometry and Vision Science, University of New South Wales, Sydney, Australia; Centre for Marine Science and Innovation and School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney, Australia.
| | - Marwan E Majzoub
- Host-Microbiome Interactions Group, School of Biomedical Sciences, Faculty of Medicine and Health, University of New South Wales, Sydney, Australia
| | - Minas Coroneo
- Department of Ophthalmology, Faculty of Medicine, University of New South Wales, Sydney, Australia
| | - Torsten Thomas
- Centre for Marine Science and Innovation and School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney, Australia
| | - Mark Willcox
- School of Optometry and Vision Science, University of New South Wales, Sydney, Australia
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Li W, Gurdziel K, Pitchaikannu A, Gupta N, Hazlett LD, Xu S. The miR-183/96/182 cluster is a checkpoint for resident immune cells and shapes the cellular landscape of the cornea. Ocul Surf 2023; 30:17-41. [PMID: 37536656 PMCID: PMC10834862 DOI: 10.1016/j.jtos.2023.07.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 07/28/2023] [Accepted: 07/31/2023] [Indexed: 08/05/2023]
Abstract
PURPOSE The conserved miR-183/96/182 cluster (miR-183C) regulates both corneal sensory innervation and corneal resident immune cells (CRICs). This study is to uncover its role in CRICs and in shaping the corneal cellular landscape at a single-cell (sc) level. METHODS Corneas of naïve, young adult [2 and 6 months old (mo)], female miR-183C knockout (KO) mice and wild-type (WT) littermates were harvested and dissociated into single cells. Dead cells were removed using a Dead Cell Removal kit. CD45+ CRICs were enriched by Magnetic Activated Cell Sorting (MACS). scRNA libraries were constructed and sequenced followed by comprehensive bioinformatic analyses. RESULTS The composition of major cell types of the cornea stays relatively stable in WT mice from 2 to 6 mo, however the compositions of subtypes of corneal cells shift with age. Inactivation of miR-183C disrupts the stability of the major cell-type composition and age-related transcriptomic shifts of subtypes of corneal cells. The diversity of CRICs is enhanced with age. Naïve mouse cornea contains previously-unrecognized resident fibrocytes and neutrophils. Resident macrophages (ResMφ) adopt cornea-specific function by expressing abundant extracellular matrix (ECM) and ECM organization-related genes. Naïve cornea is endowed with partially-differentiated proliferative ResMφ and contains microglia-like Mφ. Resident lymphocytes, including innate lymphoid cells (ILCs), NKT and γδT cells, are the major source of innate IL-17a. miR-183C limits the diversity and polarity of ResMφ. CONCLUSION miR-183C serves as a checkpoint for CRICs and imposes a global regulation of the cellular landscape of the cornea.
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Affiliation(s)
- Weifeng Li
- Predoctoral Training Program in Human Genetics, McKusick-Nathans Institute of Genetic Medicine, Department of Genetic Medicine, USA; Wilmer Eye Institute, School of Medicine, The Johns Hopkins University, Baltimore, MD, USA
| | | | - Ahalya Pitchaikannu
- Department of Ophthalmology, Visual and Anatomical Sciences, School of Medicine, Wayne State University, Detroit, MI, USA
| | - Naman Gupta
- Department of Ophthalmology, Visual and Anatomical Sciences, School of Medicine, Wayne State University, Detroit, MI, USA
| | - Linda D Hazlett
- Department of Ophthalmology, Visual and Anatomical Sciences, School of Medicine, Wayne State University, Detroit, MI, USA
| | - Shunbin Xu
- Department of Ophthalmology, Visual and Anatomical Sciences, School of Medicine, Wayne State University, Detroit, MI, USA.
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Qin L, Li Q, Wang L, Huang Y. Mass cytometry reveals the corneal immune cell changes at single cell level in diabetic mice. Front Endocrinol (Lausanne) 2023; 14:1253188. [PMID: 37732130 PMCID: PMC10507693 DOI: 10.3389/fendo.2023.1253188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Accepted: 08/17/2023] [Indexed: 09/22/2023] Open
Abstract
Introduction Diabetic ocular complications include sight-threatening consequences and decreased corneal sensitivity, characterized by decreased tear production, corneal sensitivity and delayed corneal epithelial wound healing. The pathogenesis of diabetic corneal disorders remains largely unknown. Growing evidence implies the participation of immune cells in the development of diabetic corneal diseases. Nonetheless, the immunological changes that result in diabetic corneal problems are largely unknown. Methods Mass cytometry by time of flight (CyTOF) was used to investigate immune cell cluster alterations associated with diabetic corneal disorders. CyTOF test was performed on corneal cells at a single level from 21-week-old diabetic (db/db) and non-diabetic (db/m) mice. A panel of 41 immune-related markers monitored different immune cell types in diabetic corneas. To investigate the proportion of each immune cell subpopulation, an unsupervised clustering method was employed, and T-distributed stochastic neighbor embedding was used to visualize the distinctions between different immune cell subsets. Results Through CyTOF test, we identified 10 immune cell subsets in the corneal tissues. In a novel way, we discovered significant immune alterations in diabetic corneas, including pronounced alterations in T cells and myeloid cell subgroups in diabetic corneas linked to potential biomarkers, including CD103, CCR2, SiglecF, Ly6G, and CD172a. Comprehensive immunological profiling indicated remarkable changes in the immune microenvironment in diabetic corneas, characterized by a notable decrease in CD103+CD8+ tissue-resident memory T (TRM) cells and Tregs, as well as a dramatic increase of γδT cells and subsets of CD11b+Ly6G+ myeloid-derived suppressor cells (MDSCs). Conclusion CyTOF analysis revealed significant alterations in the immune microenvironment during the development of diabetic corneal complications. This study mapped the immune microenvironment landscape of type 2 diabetic corneas, providing a fundamental understanding of immune-driven diabetic corneal disorders.
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Affiliation(s)
- Limin Qin
- Department of Ophthalmology, The Third Medical Center, Chinese People's Liberation Army of China General Hospital, Beijing, China
- Department of Ophthalmology, The First Medical Center, Chinese People's Liberation Army of China General Hospital, Beijing, China
- Department of Ophthalmology, Medical School of Chinese People’s Liberation Army (PLA), Beijing, China
| | - Qian Li
- Department of Ophthalmology, The Third Medical Center, Chinese People's Liberation Army of China General Hospital, Beijing, China
- Department of Ophthalmology, The First Medical Center, Chinese People's Liberation Army of China General Hospital, Beijing, China
- Department of Ophthalmology, Medical School of Chinese People’s Liberation Army (PLA), Beijing, China
| | - Liqiang Wang
- Department of Ophthalmology, The Third Medical Center, Chinese People's Liberation Army of China General Hospital, Beijing, China
| | - Yifei Huang
- Department of Ophthalmology, The Third Medical Center, Chinese People's Liberation Army of China General Hospital, Beijing, China
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18
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Herzog EL, Kreuzer M, Zinkernagel MS, Zysset-Burri DC. Challenges and insights in the exploration of the low abundance human ocular surface microbiome. Front Cell Infect Microbiol 2023; 13:1232147. [PMID: 37727808 PMCID: PMC10505673 DOI: 10.3389/fcimb.2023.1232147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Accepted: 08/18/2023] [Indexed: 09/21/2023] Open
Abstract
Purpose The low microbial abundance on the ocular surface results in challenges in the characterization of its microbiome. The purpose of this study was to reveal factors introducing bias in the pipeline from sample collection to data analysis of low-abundant microbiomes. Methods Lower conjunctiva and lower lid swabs were collected from six participants using either standard cotton or flocked nylon swabs. Microbial DNA was isolated with two different kits (with or without prior host DNA depletion and mechanical lysis), followed by whole-metagenome shotgun sequencing with a high sequencing depth set at 60 million reads per sample. The relative microbial compositions were generated using the two different tools MetaPhlan3 and Kraken2. Results The total amount of extracted DNA was increased by using nylon flocked swabs on the lower conjunctiva. In total, 269 microbial species were detected. The most abundant bacterial phyla were Actinobacteria, Firmicutes and Proteobacteria. Depending on the DNA extraction kit and tool used for profiling, the microbial composition and the relative abundance of viruses varied. Conclusion The microbial composition on the ocular surface is not dependent on the swab type, but on the DNA extraction method and profiling tool. These factors have to be considered in further studies about the ocular surface microbiome and other sparsely colonized microbiomes in order to improve data reproducibility. Understanding challenges and biases in the characterization of the ocular surface microbiome may set the basis for microbiome-altering interventions for treatment of ocular surface associated diseases.
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Affiliation(s)
- Elio L. Herzog
- Department of Ophthalmology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
- Department for BioMedical Research, University of Bern, Bern, Switzerland
- Graduate School for Cellular and Biomedical Sciences, University of Bern, Bern, Switzerland
| | - Marco Kreuzer
- Interfaculty Bioinformatics Unit and Swiss Institute of Bioinformatics, University of Bern, Bern, Switzerland
| | - Martin S. Zinkernagel
- Department of Ophthalmology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
- Department for BioMedical Research, University of Bern, Bern, Switzerland
| | - Denise C. Zysset-Burri
- Department of Ophthalmology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
- Department for BioMedical Research, University of Bern, Bern, Switzerland
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Kang I, Kim Y, Lee HK. Double-edged sword: γδ T cells in mucosal homeostasis and disease. Exp Mol Med 2023; 55:1895-1904. [PMID: 37696894 PMCID: PMC10545763 DOI: 10.1038/s12276-023-00985-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Revised: 02/03/2023] [Accepted: 02/08/2023] [Indexed: 09/13/2023] Open
Abstract
The mucosa is a tissue that covers numerous body surfaces, including the respiratory tract, digestive tract, eye, and urogenital tract. Mucosa is in direct contact with pathogens, and γδ T cells perform various roles in the tissue. γδ T cells efficiently defend the mucosa from various pathogens, such as viruses, bacteria, and fungi. In addition, γδ T cells are necessary for the maintenance of homeostasis because they select specific organisms in the microbiota and perform immunoregulatory functions. Furthermore, γδ T cells directly facilitate pregnancy by producing growth factors. However, γδ T cells can also play detrimental roles in mucosal health by amplifying inflammation, thereby worsening allergic responses. Moreover, these cells can act as major players in autoimmune diseases. Despite their robust roles in the mucosa, the application of γδ T cells in clinical practice is lacking because of factors such as gaps between mice and human cells, insufficient knowledge of the target of γδ T cells, and the small population of γδ T cells. However, γδ T cells may be attractive targets for clinical use due to their effector functions and low risk of inducing graft-versus-host disease. Therefore, robust research on γδ T cells is required to understand the crucial features of these cells and apply these knowledges to clinical practices.
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Affiliation(s)
- In Kang
- Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea
| | - Yumin Kim
- Department of Biological Sciences, KAIST, Daejeon, 34141, Republic of Korea
| | - Heung Kyu Lee
- Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea.
- Department of Biological Sciences, KAIST, Daejeon, 34141, Republic of Korea.
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20
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Liu Y, Yang X, Li H, Li D, Zou Y, Gong B, Yu M. Characteristics of Autophagy-Related Genes, Diagnostic Models, and Their Correlation with Immune Infiltration in Keratoconus. J Inflamm Res 2023; 16:3763-3781. [PMID: 37663760 PMCID: PMC10474872 DOI: 10.2147/jir.s420164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2023] [Accepted: 08/23/2023] [Indexed: 09/05/2023] Open
Abstract
Purpose Keratoconus (KTCN) is one of the most common degenerative keratopathies, significantly affecting vision and even leading to blindness. This study identifies potential biomarkers of KTCN based on the characterization of autophagy-related genes (ARGs) and the construction of a diagnostic model; and explores their relevance to immune infiltrating cells in KTCN. Methods Gene Expression Omnibus (GEO) data were downloaded and ARGs were acquired from GeneCards and Molecular Signatures Database (MSigDB). Autophagy-related differential expression genes (ARDEGs) were discovered through the integration of differentially expressed genes (DEGs) with ARGs, while hub genes of KTCN were discovered by protein-protein interaction (PPI) network analysis. The probable biological roles of these hub ARDEGs were examined using functional enrichment analysis, and a KTCN diagnostic model was generated using the least absolute shrinkage and selection operator (LASSO) regression analysis. We also employed the CIBERSORTx and ssGSEA algorithms to identify potential regulatory pathways to compare the abundance of immune cell infiltrates and their association with hub genes. Finally, the hub gene expression levels were confirmed using validation datasets as well as blood samples from KTCN and healthy individuals. Results In this study, we identified 12 hub ARDEGs, of which 9 genes were substantially distinct between KTCN patients and normal groups. The LASSO risk score was used to generate the nomogram, and the calibration curve evaluated the model's effective diagnostic performance (C index of 0.961). Patients with KTCN had greater percentages of M2 Macrophages and Gamma delta T cells, according to CIBERSORTx and ssGSEA. The outcomes of the bioinformatics analysis were supported by the DDIT3 and BINP3 expression levels in KTCN patients and healthy controls, according to the qRT-PCR data. Conclusion Five biomarkers (CFTR, PLIN2, DDIT3, BAG3, and BNIP3) and diagnostic models offer fresh perspectives on identifying and managing KTCN.
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Affiliation(s)
- Yi Liu
- Department of Ophthalmology, Sichuan Provincial People’s Hospital, University of Electronic Science and Technology of China, Chengdu, People’s Republic of China
- Chinese Academy of Sciences Sichuan Translational Medicine Research Hospital, Chengdu, People’s Republic of China
- School of Medicine, University of Electronic Science and Technology of China, Chengdu, People’s Republic of China
| | - Xu Yang
- School of Medicine, University of Electronic Science and Technology of China, Chengdu, People’s Republic of China
| | - Huan Li
- School of Medicine, University of Electronic Science and Technology of China, Chengdu, People’s Republic of China
- Department of Health Management, Sichuan Academy of Medical Sciences & Sichuan Provincial People’s Hospital, University of Electronic Science and Technology of China, Chengdu, People’s Republic of China
| | - Dongfeng Li
- Department of Ophthalmology, Sichuan Provincial People’s Hospital, University of Electronic Science and Technology of China, Chengdu, People’s Republic of China
- Chinese Academy of Sciences Sichuan Translational Medicine Research Hospital, Chengdu, People’s Republic of China
| | - Yuhao Zou
- Department of Ophthalmology, Sichuan Provincial People’s Hospital, University of Electronic Science and Technology of China, Chengdu, People’s Republic of China
- Chinese Academy of Sciences Sichuan Translational Medicine Research Hospital, Chengdu, People’s Republic of China
| | - Bo Gong
- Department of Health Management, Sichuan Academy of Medical Sciences & Sichuan Provincial People’s Hospital, University of Electronic Science and Technology of China, Chengdu, People’s Republic of China
- Human Disease Genes Key Laboratory of Sichuan Province and Institute of Laboratory Medicine, Sichuan Academy of Medical Sciences & Sichuan Provincial People’s Hospital, University of Electronic Science and Technology of China, Chengdu, People’s Republic of China
- Research Unit for Blindness Prevention of Chinese Academy of Medical Sciences (2019RU026), Sichuan Academy of Medical Sciences & Sichuan Provincial People’s Hospital, University of Electronic Science and Technology of China, Chengdu, People’s Republic of China
| | - Man Yu
- Department of Ophthalmology, Sichuan Provincial People’s Hospital, University of Electronic Science and Technology of China, Chengdu, People’s Republic of China
- Chinese Academy of Sciences Sichuan Translational Medicine Research Hospital, Chengdu, People’s Republic of China
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21
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Rizk J, Mörbe UM, Agerholm R, Baglioni MV, Catafal Tardos E, Fares da Silva MGF, Ulmert I, Kadekar D, Viñals MT, Bekiaris V. The cIAP ubiquitin ligases sustain type 3 γδ T cells and ILC during aging to promote barrier immunity. J Exp Med 2023; 220:e20221534. [PMID: 37440178 PMCID: PMC10345214 DOI: 10.1084/jem.20221534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Revised: 04/10/2023] [Accepted: 06/22/2023] [Indexed: 07/14/2023] Open
Abstract
Early-life cues shape the immune system during adulthood. However, early-life signaling pathways and their temporal functions are not well understood. Herein, we demonstrate that the cellular inhibitor of apoptosis proteins 1 and 2 (cIAP1/2), which are E3 ubiquitin ligases, sustain interleukin (IL)-17-producing γ δ T cells (γδT17) and group 3 innate lymphoid cells (ILC3) during late neonatal and prepubescent life. We show that cell-intrinsic deficiency of cIAP1/2 at 3-4 wk of life leads to downregulation of the transcription factors cMAF and RORγt and failure to enter the cell cycle, followed by progressive loss of γδT17 cells and ILC3 during aging. Mice deficient in cIAP1/2 have severely reduced γδT17 cells and ILC3, present with suboptimal γδT17 responses in the skin, lack intestinal isolated lymphoid follicles, and cannot control intestinal bacterial infection. Mechanistically, these effects appear to be dependent on overt activation of the non-canonical NF-κB pathway. Our data identify cIAP1/2 as early-life molecular switches that establish effective type 3 immunity during aging.
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Affiliation(s)
- John Rizk
- Department of Health Technology, Technical University of Denmark, Kgs Lyngby, Denmark
- Department of Immunology and Microbiology, LEO Foundation Skin Immunology Research Center, University of Copenhagen, Copenhagen, Denmark
| | - Urs M. Mörbe
- Department of Health Technology, Technical University of Denmark, Kgs Lyngby, Denmark
| | - Rasmus Agerholm
- Department of Health Technology, Technical University of Denmark, Kgs Lyngby, Denmark
| | | | - Elisa Catafal Tardos
- Department of Health Technology, Technical University of Denmark, Kgs Lyngby, Denmark
| | | | - Isabel Ulmert
- Department of Health Technology, Technical University of Denmark, Kgs Lyngby, Denmark
| | - Darshana Kadekar
- Department of Health Technology, Technical University of Denmark, Kgs Lyngby, Denmark
| | | | - Vasileios Bekiaris
- Department of Health Technology, Technical University of Denmark, Kgs Lyngby, Denmark
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22
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Datta A, Lee JH, Flandrin O, Horneman H, Lee J, Metruccio MME, Bautista D, Evans DJ, Fleiszig SMJ. TRPA1 and TPRV1 Ion Channels Are Required for Contact Lens-Induced Corneal Parainflammation and Can Modulate Levels of Resident Corneal Immune Cells. Invest Ophthalmol Vis Sci 2023; 64:21. [PMID: 37585189 PMCID: PMC10434714 DOI: 10.1167/iovs.64.11.21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Accepted: 07/17/2023] [Indexed: 08/17/2023] Open
Abstract
Purpose Contact lens wear can induce corneal parainflammation involving CD11c+ cell responses (24 hours), γδ T cell responses (24 hours and 6 days), and IL-17-dependent Ly6G+ cell responses (6 days). Topical antibiotics blocked these CD11c+ responses. Because corneal CD11c+ responses to bacteria require transient receptor potential (TRP) ion-channels (TRPA1/TRPV1), we determined if these channels mediate lens-induced corneal parainflammation. Methods Wild-type mice were fitted with contact lenses for 24 hours or 6 days and compared to lens wearing TRPA1 (-/-) or TRPV1 (-/-) mice or resiniferatoxin (RTX)-treated mice. Contralateral eyes were not fitted with lenses. Corneas were examined for major histocompatibility complex (MHC) class II+, CD45+, γδ T, or TNF-α+ cell responses (24 hours) or Ly6G+ responses (6 days) by quantitative imaging. The quantitative PCR (qPCR) determined cytokine gene expression. Results Lens-induced increases in MHC class II+ cells after 24 hours were abrogated in TRPV1 (-/-) but not TRPA1 (-/-) mice. Increases in CD45+ cells were unaffected. Increases in γδ T cells after 24 hours of wear were abrogated in TRPA1 (-/-) and TRPV1 (-/-) mice, as were 6 day Ly6G+ cell responses. Contralateral corneas of TRPA1 (-/-) and TRPV1 (-/-) mice showed reduced MHC class II+ and γδ T cells at 24 hours. RTX inhibited lens-induced parainflammatory phenotypes (24 hours and 6 days), blocked lens-induced TNF-α and IL-18 gene expression, TNF-α+ cell infiltration (24 hours), and reduced baseline MHC class II+ cells. Conclusions TRPA1 and TRPV1 mediate contact lens-induced corneal parainflammation after 24 hours and 6 days of wear and can modulate baseline levels of resident corneal immune cells.
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Affiliation(s)
- Ananya Datta
- Herbert Wertheim School of Optometry & Vision Science, University of California, Berkeley, California, United States
| | - Ji Hyun Lee
- Herbert Wertheim School of Optometry & Vision Science, University of California, Berkeley, California, United States
| | - Orneika Flandrin
- Herbert Wertheim School of Optometry & Vision Science, University of California, Berkeley, California, United States
| | - Hart Horneman
- Herbert Wertheim School of Optometry & Vision Science, University of California, Berkeley, California, United States
| | - Justin Lee
- Herbert Wertheim School of Optometry & Vision Science, University of California, Berkeley, California, United States
| | - Matteo M E Metruccio
- Herbert Wertheim School of Optometry & Vision Science, University of California, Berkeley, California, United States
| | - Diana Bautista
- Department of Molecular and Cell Biology and Helen Wills Neuroscience Institute, University of California, Berkeley, California, United States
| | - David J Evans
- Herbert Wertheim School of Optometry & Vision Science, University of California, Berkeley, California, United States
- College of Pharmacy, Touro University California, Vallejo, California, United States
| | - Suzanne M J Fleiszig
- Herbert Wertheim School of Optometry & Vision Science, University of California, Berkeley, California, United States
- Graduate groups in Vision Science, Microbiology, and Infectious Diseases & Immunity, University of California, Berkeley, California, United States
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23
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Hong M, Tong L, Mehta JS, Ong HS. Impact of Exposomes on Ocular Surface Diseases. Int J Mol Sci 2023; 24:11273. [PMID: 37511032 PMCID: PMC10379833 DOI: 10.3390/ijms241411273] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Revised: 07/04/2023] [Accepted: 07/06/2023] [Indexed: 07/30/2023] Open
Abstract
Ocular surface diseases (OSDs) are significant causes of ocular morbidity, and are often associated with chronic inflammation, redness, irritation, discomfort, and pain. In severe OSDs, loss of vision can result from ocular surface failure, characterised by limbal stem cell deficiencies, corneal vascularisation, corneal opacification, and surface keratinisation. External and internal exposomes are measures of environmental factors that individuals are exposed to, and have been increasingly studied for their impact on ocular surface diseases. External exposomes consist of external environmental factors such as dust, pollution, and stress; internal exposomes consist of the surface microbiome, gut microflora, and oxidative stress. Concerning internal exposomes, alterations in the commensal ocular surface microbiome of patients with OSDs are increasingly reported due to advancements in metagenomics using next-generation sequencing. Changes in the microbiome may be a consequence of the underlying disease processes or may have a role in the pathogenesis of OSDs. Understanding the changes in the ocular surface microbiome and the impact of various other exposomes may also help to establish the causative factors underlying ocular surface inflammation and scarring, the hallmarks of OSDs. This review provides a summary of the current evidence on exposomes in various OSDs.
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Affiliation(s)
- Merrelynn Hong
- Corneal and External Diseases Department, Singapore National Eye Centre, Singapore 168751, Singapore
| | - Louis Tong
- Corneal and External Diseases Department, Singapore National Eye Centre, Singapore 168751, Singapore
- Ocular Surface Group, Singapore Eye Research Institute, Singapore 169856, Singapore
- Department of Ophthalmology and Visual Science, Duke-NUS Medical School, Singapore 169857, Singapore
| | - Jodhbir S Mehta
- Corneal and External Diseases Department, Singapore National Eye Centre, Singapore 168751, Singapore
- Department of Ophthalmology and Visual Science, Duke-NUS Medical School, Singapore 169857, Singapore
- Tissue Engineering and Cell Therapy Group, Singapore Eye Research Institute, Singapore 169856, Singapore
| | - Hon Shing Ong
- Corneal and External Diseases Department, Singapore National Eye Centre, Singapore 168751, Singapore
- Department of Ophthalmology and Visual Science, Duke-NUS Medical School, Singapore 169857, Singapore
- Tissue Engineering and Cell Therapy Group, Singapore Eye Research Institute, Singapore 169856, Singapore
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24
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Shen X, Xu Y, Huang J, Wu P, Zhou W, Chen Y. A comparative study on two methods of ocular surface microbial sampling. BMC Ophthalmol 2023; 23:228. [PMID: 37217905 DOI: 10.1186/s12886-023-02979-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Accepted: 05/17/2023] [Indexed: 05/24/2023] Open
Abstract
PURPOSE To compare the effect of traditional conjunctival sac swab sampling (A) with aerosolization ocular surface microorganism sampling (B),a novel microbial sampling method, in detecting ocular microbial infection. METHODS The study included 61 participants (122 eyes) enrolled at the Eye Hospital, Wenzhou Medical University from December, 2021 to March, 2023. Each eye of the participants underwent sampling first with method A then B.Before aerosolization sampling, the air environment was disinfected and sampled as blank air control sample. Subsequently, the air pulses impinging the ocular surface causes dehiscence of the tear film covering the ocular surface and aerosols are formed.The microorganisms from the ocular surface attach to the aerosols generated as aerosolization ocular surface microorganism and be sampled as subject sample by bio-aerosol sampler.The samples were collected and incubated at 25℃ for 3-5 days and 37℃ for 24-48 h.The colonies were counted and identified by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry. RESULTS The accuracy in Group B was higher than that in Group A (45.8% vs. 38.3%, P = 0.289). There was a slight level of agreement between the results from both the sampling methods (k = 0.031, P = 0.730). The sensitivity in Group B was higher than that in Group A (57.1% vs. 35.7%, P = 0.453). The specificity results in Group B was higher than that in Group A (44.3% vs. 38.7%, P = 0.480). There were 12 and 37 types of microbes detected in Groups A and B, respectively. CONCLUSIONS Compared with traditional swab sampling, the novel aerosolization sampling method shows higher accuracy and more comprehensive detection of microbes; however, it cannot completely replace swab sampling. The novel method can be a novel conducive strategy and supplement swab sampling to auxiliary diagnose ocular surface infection.
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Affiliation(s)
- Xinyi Shen
- National Clinical Research Center for Ocular Diseases, Eye Hospital, Wenzhou Medical University, Wenzhou, 325027, China
| | - Yi Xu
- National Clinical Research Center for Ocular Diseases, Eye Hospital, Wenzhou Medical University, Wenzhou, 325027, China
| | - Jinzhi Huang
- National Clinical Research Center for Ocular Diseases, Eye Hospital, Wenzhou Medical University, Wenzhou, 325027, China
| | - Peiyu Wu
- National Clinical Research Center for Ocular Diseases, Eye Hospital, Wenzhou Medical University, Wenzhou, 325027, China
| | - Weihe Zhou
- National Clinical Research Center for Ocular Diseases, Eye Hospital, Wenzhou Medical University, Wenzhou, 325027, China
| | - Yanyan Chen
- National Clinical Research Center for Ocular Diseases, Eye Hospital, Wenzhou Medical University, Wenzhou, 325027, China.
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25
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Wang S, Wu J, Ran D, Ou G, Chen Y, Xu H, Deng L, Chen X. Study of the Relationship between Mucosal Immunity and Commensal Microbiota: A Bibliometric Analysis. Nutrients 2023; 15:nu15102398. [PMID: 37242281 DOI: 10.3390/nu15102398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Revised: 05/17/2023] [Accepted: 05/18/2023] [Indexed: 05/28/2023] Open
Abstract
This study presents the first bibliometric evaluation and systematic analysis of publications related to mucosal immunity and commensal microbiota over the last two decades and summarizes the contribution of countries, institutions, and scholars in the study of this field. A total of 1423 articles related to mucosal immunity and commensal microbiota in vivo published in 532 journals by 7774 authors from 1771 institutions in 74 countries/regions were analyzed. The interaction between commensal microbiota in vivo and mucosal immunity is essential in regulating the immune response of the body, maintaining communication between different kinds of commensal microbiota and the host, and so on. Several hot spots in this field have been found to have received extensive attention in recent years, especially the effects of metabolites of key strains on mucosal immunity, the physiopathological phenomena of commensal microbiota in various sites including the intestine, and the relationship between COVID-19, mucosal immunity and microbiota. We hope that the full picture of the last 20 years in this research area provided in this study will serve to deliver necessary cutting-edge information to relevant researchers.
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Affiliation(s)
- Shiqi Wang
- School of Traditional Chinese Medicine, Jinan University, Guangzhou 510632, China
| | - Jialin Wu
- School of Traditional Chinese Medicine, Jinan University, Guangzhou 510632, China
| | - Duo Ran
- School of Traditional Chinese Medicine, Jinan University, Guangzhou 510632, China
| | - Guosen Ou
- School of Traditional Chinese Medicine, Jinan University, Guangzhou 510632, China
| | - Yaokang Chen
- School of Traditional Chinese Medicine, Jinan University, Guangzhou 510632, China
| | - Huachong Xu
- School of Traditional Chinese Medicine, Jinan University, Guangzhou 510632, China
| | - Li Deng
- School of Traditional Chinese Medicine, Jinan University, Guangzhou 510632, China
| | - Xiaoyin Chen
- School of Traditional Chinese Medicine, Jinan University, Guangzhou 510632, China
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26
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Bharadwaj R, Lusi CF, Mashayekh S, Nagar A, Subbarao M, Kane GI, Wodzanowski KA, Brown AR, Okuda K, Monahan A, Paik D, Nandy A, Anonick MV, Goldman WE, Kanneganti TD, Orzalli MH, Grimes CL, Atukorale PU, Silverman N. Methotrexate suppresses psoriatic skin inflammation by inhibiting muropeptide transporter SLC46A2 activity. Immunity 2023; 56:998-1012.e8. [PMID: 37116499 PMCID: PMC10195032 DOI: 10.1016/j.immuni.2023.04.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Revised: 01/04/2023] [Accepted: 04/03/2023] [Indexed: 04/30/2023]
Abstract
Cytosolic innate immune sensing is critical for protecting barrier tissues. NOD1 and NOD2 are cytosolic sensors of small peptidoglycan fragments (muropeptides) derived from the bacterial cell wall. These muropeptides enter cells, especially epithelial cells, through unclear mechanisms. We previously implicated SLC46 transporters in muropeptide transport in Drosophila immunity. Here, we focused on Slc46a2, which was highly expressed in mammalian epidermal keratinocytes, and showed that it was critical for the delivery of diaminopimelic acid (DAP)-muropeptides and activation of NOD1 in keratinocytes, whereas the related transporter Slc46a3 was critical for delivering the NOD2 ligand MDP to keratinocytes. In a mouse model, Slc46a2 and Nod1 deficiency strongly suppressed psoriatic inflammation, whereas methotrexate, a commonly used psoriasis therapeutic, inhibited Slc46a2-dependent transport of DAP-muropeptides. Collectively, these studies define SLC46A2 as a transporter of NOD1-activating muropeptides, with critical roles in the skin barrier, and identify this transporter as an important target for anti-inflammatory intervention.
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Affiliation(s)
- Ravi Bharadwaj
- Program in Innate Immunity and Division of Infectious Diseases and Immunology, Department of Medicine, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA
| | - Christina F Lusi
- Department of Biomedical Engineering, University of Massachusetts Amherst, Amherst, MA 01003, USA
| | | | - Abhinit Nagar
- Program in Innate Immunity and Division of Infectious Diseases and Immunology, Department of Medicine, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA
| | - Malireddi Subbarao
- Department of Immunology, St Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - Griffin I Kane
- Department of Biomedical Engineering, University of Massachusetts Amherst, Amherst, MA 01003, USA
| | | | - Ashley R Brown
- Chemistry and Biochemistry, University of Delaware, Newark, DE, USA
| | - Kendi Okuda
- Program in Innate Immunity and Division of Infectious Diseases and Immunology, Department of Medicine, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA
| | - Amanda Monahan
- Program in Innate Immunity and Division of Infectious Diseases and Immunology, Department of Medicine, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA
| | - Donggi Paik
- Program in Innate Immunity and Division of Infectious Diseases and Immunology, Department of Medicine, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA
| | - Anubhab Nandy
- Program in Innate Immunity and Division of Infectious Diseases and Immunology, Department of Medicine, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA
| | | | - William E Goldman
- Department of Microbiology, University of North Carolina School of Medicine, Chapel Hill, NC 27599, USA
| | | | - Megan H Orzalli
- Program in Innate Immunity and Division of Infectious Diseases and Immunology, Department of Medicine, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA
| | | | - Prabhani U Atukorale
- Department of Biomedical Engineering, University of Massachusetts Amherst, Amherst, MA 01003, USA
| | - Neal Silverman
- Program in Innate Immunity and Division of Infectious Diseases and Immunology, Department of Medicine, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA.
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27
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Datta A, Truong T, Lee JH, Horneman H, Flandrin O, Lee J, Kumar NG, Caspi RR, Evans DJ, Fleiszig SMJ. Contact lens-induced corneal parainflammation involving Ly6G+ cell infiltration requires IL-17A and γδ T cells. Ocul Surf 2023; 28:79-89. [PMID: 36758675 PMCID: PMC10406967 DOI: 10.1016/j.jtos.2023.02.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Revised: 01/11/2023] [Accepted: 02/06/2023] [Indexed: 02/10/2023]
Abstract
PURPOSE Previously, using a murine model, we reported that contact lens (CL) wear induced corneal parainflammation involving CD11c+ cells after 24 h and Ly6G+ cells (neutrophils) after 5-6 days. Here, we investigated the role of IL-17 and γδ T cells in the CL-induced neutrophil response. METHODS CL-wearing C57BL/6 wild-type (WT) mice were compared to lens-wearing IL-17A/F single or double gene knock-out mice, or mice treated with UC7-13D5 monoclonal antibody to functionally deplete γδ T cells. Contralateral eyes served as no lens wear controls. Corneal Ly6G+ and γδ T cell responses were quantified as was expression of genes encoding pro-inflammatory cytokines IL-17A/F, IL-β, IL-18 and expression of IL-17A/F protein. RESULTS After 6 days lens wear, WT corneas showed Ly6G+ cell infiltration while remaining free of visible pathology. In contrast, lens-wearing corneas of IL-17AF (-/-), IL-17A (-/-) mice and γδ T cell-depleted mice showed little or no Ly6G+ cell infiltration. No Ly6G+ cell infiltration was detected in contralateral eye controls. Lens-wearing WT corneas also showed a significant increase in γδ T cells after 24 h that was maintained after 6 days of wear, and significantly increased cytokine gene expression after 6 days versus contralateral controls: IL-18 & IL-17A (∼3.9 fold) and IL-23 (∼6.5-fold). Increased IL-17A protein (∼4-fold) was detected after 6 days lens wear. γδ T cell-depletion abrogated these lens-induced changes in cytokine gene and protein expression. CONCLUSION Together, these data show that IL-17A and γδ T cells are required for Ly6G+ cell (neutrophil) infiltration of the cornea during contact lens-induced parainflammation.
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Affiliation(s)
- Ananya Datta
- Herbert Wertheim School of Optometry & Vision Science, University of California, Berkeley, CA, USA
| | - Tiffany Truong
- Herbert Wertheim School of Optometry & Vision Science, University of California, Berkeley, CA, USA
| | - Ji Hyun Lee
- Herbert Wertheim School of Optometry & Vision Science, University of California, Berkeley, CA, USA
| | - Hart Horneman
- Herbert Wertheim School of Optometry & Vision Science, University of California, Berkeley, CA, USA
| | - Orneika Flandrin
- Herbert Wertheim School of Optometry & Vision Science, University of California, Berkeley, CA, USA
| | - Justin Lee
- Herbert Wertheim School of Optometry & Vision Science, University of California, Berkeley, CA, USA
| | - Naren G Kumar
- Herbert Wertheim School of Optometry & Vision Science, University of California, Berkeley, CA, USA
| | - Rachel R Caspi
- Laboratory of Immunology, National Eye Institute, NIH, Bethesda, MD, USA
| | - David J Evans
- Herbert Wertheim School of Optometry & Vision Science, University of California, Berkeley, CA, USA; College of Pharmacy, Touro University California, Vallejo, CA, USA
| | - Suzanne M J Fleiszig
- Herbert Wertheim School of Optometry & Vision Science, University of California, Berkeley, CA, USA; Graduate Groups in Vision Science, Microbiology, and Infectious Diseases & Immunity, University of California, Berkeley, CA, USA.
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28
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Hazlett LD, Xu S, Somayajulu M, McClellan SA. Host-microbe interactions in cornea. Ocul Surf 2023; 28:413-423. [PMID: 34619389 PMCID: PMC8977393 DOI: 10.1016/j.jtos.2021.09.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Revised: 09/23/2021] [Accepted: 09/26/2021] [Indexed: 11/23/2022]
Abstract
Corneal infections result through interaction between microbes and host innate immune receptors. Damage to the cornea occurs as a result of microbial virulence factors and is often exacerbated by lack of a controlled host immune response; the latter contributing to bystander damage to corneal structure. Understanding mechanisms involved in host microbial interactions is critical to development of novel therapeutic targets, ultimate control of microbial pathogenesis, and restoration of tissue homeostasis. Studies on these interactions continue to provide exciting findings directly related to this ultimate goal.
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Affiliation(s)
- Linda D Hazlett
- Department of Ophthalmology, Visual and Anatomical Sciences, Wayne State University School of Medicine, Detroit, MI, 48201, USA.
| | - Shunbin Xu
- Department of Ophthalmology, Visual and Anatomical Sciences, Wayne State University School of Medicine, Detroit, MI, 48201, USA
| | - Mallika Somayajulu
- Department of Ophthalmology, Visual and Anatomical Sciences, Wayne State University School of Medicine, Detroit, MI, 48201, USA
| | - Sharon A McClellan
- Department of Ophthalmology, Visual and Anatomical Sciences, Wayne State University School of Medicine, Detroit, MI, 48201, USA
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29
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Ma B, Zhou Y, Hu Y, Duan H, Sun Z, Wang P, Li W, Han W, Qi H. Mapping Resident Immune Cells in the Murine Ocular Surface and Lacrimal Gland by Flow Cytometry. Ocul Immunol Inflamm 2023; 31:748-759. [PMID: 36867079 DOI: 10.1080/09273948.2023.2182327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/04/2023]
Abstract
BACKGROUND The ocular surface and lacrimal gland have a frontline position in mucosal immunology. However, there have been few updates to the immune cell atlas of these tissues in recent years. PURPOSE To map the immune cells in murine ocular surface tissues and lacrimal gland. METHODS Central and peripheral corneas, conjunctiva, and lacrimal gland were dissociated into single cell suspensions, followed by flow cytometry. Discrepancy of immune cells between the central and peripheral corneas was compared. In the conjunctiva and lacrimal gland, myeloid cells were clustered by tSNE and FlowSOM based on the expression of F4/80, Ly6C, Ly6G, and MHC II. ILCs, type 1 immune cells, and type 3 immune cells were analyzed. RESULTS The number of immune cells in peripheral corneas was about 16 folds of that in central corneas. B cells accounted for 8.74% of immune cells in murine peripheral corneas. In the conjunctiva and lacrimal gland, most myeloid cells tended out to be monocytes, macrophages, and classical dendritic cells (cDCs). ILC3 were 6.28% and 3.63% of ILCs in the conjunctiva and lacrimal gland, respectively. Th1, Tc1, and NK cells were predominant type 1 immune cells. γδ T17 cells and ILC3 outnumbered Th17 cells among type 3 T cells. CONCLUSION B cells resident in murine corneas were reported for the first time. Additionally, we proposed a strategy of clustering myeloid cells to better understand their heterogeneity in the conjunctiva and lacrimal gland based on tSNE and FlowSOM. Furthermore, we identified the ILC3 in the conjunctiva and lacrimal gland for the first time. Compositions of type 1 and type 3 immune cells were summarized. Our study provides a fundamental reference and novel insights for ocular surface immune homeostasis and diseases.
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Affiliation(s)
- Baikai Ma
- Department of Ophthalmology, Peking University Third Hospital, Beijing, China.,Beijing Key Laboratory of Restoration of Damaged Ocular Nerve, Beijing, China
| | - Yifan Zhou
- Department of Ophthalmology, Peking University Third Hospital, Beijing, China.,Beijing Key Laboratory of Restoration of Damaged Ocular Nerve, Beijing, China
| | - Yuzhe Hu
- Department of Immunology, Peking University Health Science Center, Beijing, China.,NHC Key Laboratory of Medical Immunology, Beijing, China.,Peking University Center for Human Disease Genomics, Beijing, China
| | - Hongyu Duan
- Department of Ophthalmology, Peking University Third Hospital, Beijing, China.,Beijing Key Laboratory of Restoration of Damaged Ocular Nerve, Beijing, China
| | - Zhengze Sun
- Department of Ophthalmology, Peking University Third Hospital, Beijing, China.,Beijing Key Laboratory of Restoration of Damaged Ocular Nerve, Beijing, China
| | - Pingzhang Wang
- Department of Immunology, Peking University Health Science Center, Beijing, China.,NHC Key Laboratory of Medical Immunology, Beijing, China.,Peking University Center for Human Disease Genomics, Beijing, China
| | - Wei Li
- Eye Institute of Xiamen University, Xiamen, China.,Xiang'an Hospital of Xiamen University, Xiamen, China.,Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, Xiamen, China
| | - Wenling Han
- Department of Immunology, Peking University Health Science Center, Beijing, China.,NHC Key Laboratory of Medical Immunology, Beijing, China.,Peking University Center for Human Disease Genomics, Beijing, China
| | - Hong Qi
- Department of Ophthalmology, Peking University Third Hospital, Beijing, China.,Beijing Key Laboratory of Restoration of Damaged Ocular Nerve, Beijing, China
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30
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Chang CCJ, Winn BJ. Perturbations of the ocular surface microbiome and their effect on host immune function. Curr Opin Ophthalmol 2023; 34:181-188. [PMID: 36728960 PMCID: PMC9908829 DOI: 10.1097/icu.0000000000000931] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
PURPOSE OF REVIEW Current literature describing the ocular surface microbiome and host immunity are reviewed alongside experiments studying perturbations of the microbiome to explore the hypothesis that disruption of a healthy microbiome may predispose the ocular surface to inflammation and infection. RECENT FINDINGS The ocular surface of healthy subjects is colonized by stable, pauci-microbial communities that are tolerant to the host immune response and are dominated by the genera Corynebacterium , Propionibacterium , and Staphylococcus . In animal studies, commensal microbes on the ocular surface interact with toll-like receptors to regulate the immune system through immune cell and inflammatory cytokine production, promoting homeostasis and protecting against infection. Contact lens wear, lens wash solutions, and preserved topical medications can disrupt the native microbiome and alter the relative diversity and composition of microbes on the ocular surface. SUMMARY The ocular surface microbiome confers protection against pathogenic colonization and immune dysregulation. Disruption of this microbiome by exogenous factors may alter the resistance of the ocular surface to infection. Further study of the relationships between human ocular surface microbiome and the local immune response are needed.
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Affiliation(s)
- Chih-Chiun Jamie Chang
- Department of Ophthalmology, University of California, San Francisco School of Medicine, San Francisco, CA
- Department of Ophthalmology, New York Eye and Ear Infirmary – Icahn School of Medicine at Mount Sinai, New York, NY
| | - Bryan J. Winn
- Department of Ophthalmology, University of California, San Francisco School of Medicine, San Francisco, CA
- Ophthalmology Section, Surgical Service, San Francisco Veterans Affairs Health Care System, San Francisco, CA
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31
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Rigas Y, Treat BR, Shane J, Shanks RMQ, St. Leger AJ. Genetic Manipulation of Corynebacterium mastitidis to Better Understand the Ocular Microbiome. Invest Ophthalmol Vis Sci 2023; 64:19. [PMID: 36799874 PMCID: PMC9942783 DOI: 10.1167/iovs.64.2.19] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Accepted: 01/24/2023] [Indexed: 02/18/2023] Open
Abstract
Purpose Corynebacterium spp. are Gram-positive bacteria commonly associated with the ocular surface. Corynebacterium mastitidis was isolated from mouse eyes and was demonstrated to induce a beneficial immune response that can protect the eye from pathogenic infection. Because eye-relevant Corynebacterium spp. are not well described, we generated a C. mast transposon (Tn) mutant library to gain a better understanding of the nature of eye-colonizing bacteria. Methods Tn mutagenesis was performed with a custom Tn5-based transposon that incorporated a promoterless gene for the fluorescent protein mCherry. We screened our library using flow cytometry and enzymatic assays to identify useful mutants that demonstrate the utility of our approach. Results Fluorescence-activated cell sorting (FACS) of mCherry+ bacteria allowed us to identify a highly fluorescent mutant that was detectable on the murine ocular surface using microscopy. We also identified a functional knockout that was unable to hydrolyze urea, UreaseKO. Although uric acid is an antimicrobial factor produced in tears, UreaseKO bacterium maintained an ability to colonize the eye, suggesting that urea hydrolysis is not required for colonization. In vitro and in vivo, both mutants maintained the potential to stimulate protective immunity as compared to wild-type C. mast. Conclusions In sum, we describe a method to genetically modify an eye-colonizing microbe, C. mast. Furthermore, the procedures outlined here will allow for the continued development of genetic tools for modifying ocular Corynebacterium spp., which will lead to a more complete understanding of the interactions between the microbiome and host immunity at the ocular surface.
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Affiliation(s)
- Yannis Rigas
- Department of Ophthalmology, University of Pittsburgh, Pittsburgh Pennsylvania, United States
| | - Benjamin R. Treat
- Department of Ophthalmology, University of Pittsburgh, Pittsburgh Pennsylvania, United States
| | - Jackie Shane
- Department of Ophthalmology, University of Pittsburgh, Pittsburgh Pennsylvania, United States
| | - Robert M. Q. Shanks
- Department of Ophthalmology, University of Pittsburgh, Pittsburgh Pennsylvania, United States
| | - Anthony J. St. Leger
- Department of Ophthalmology, University of Pittsburgh, Pittsburgh Pennsylvania, United States
- Department of Immunology, University of Pittsburgh, Pittsburgh Pennsylvania, United States
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Peter VG, Morandi SC, Herzog EL, Zinkernagel MS, Zysset-Burri DC. Investigating the Ocular Surface Microbiome: What Can It Tell Us? Clin Ophthalmol 2023; 17:259-271. [PMID: 36698849 PMCID: PMC9870096 DOI: 10.2147/opth.s359304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2022] [Accepted: 01/10/2023] [Indexed: 01/20/2023] Open
Abstract
While pathogens of the eye have been studied for a very long time, the existence of resident microbes on the surface of healthy eyes has gained interest only recently. It appears that commensal microbes are a normal feature of the healthy eye, whose role and properties are currently the subject of extensive research. This review provides an overview of studies that have used 16s rRNA gene sequencing and whole metagenome shotgun sequencing to characterize microbial communities associated with the healthy ocular surface from kingdom to genus level. Bacteria are the primary colonizers of the healthy ocular surface, with three predominant phyla: Proteobacteria, Actinobacteria, and Firmicutes, regardless of the host, environment, and method used. Refining the microbial classification to the genus level reveals a highly variable distribution from one individual and study to another. Factors accounting for this variability are intriguing - it is currently unknown to what extent this is attributable to the individuals and their environment and how much is artifactual. Clearly, it is technically challenging to accurately describe the microorganisms of the ocular surface because their abundance is relatively low, thus, permitting substantial contaminations. More research is needed, including better experimental standards to prevent biases, and the exploration of the ocular surface microbiome's role in a spectrum of healthy to pathological states. Outcomes from such research include the opportunity for therapeutic interventions targeting the microbiome.
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Affiliation(s)
- Virginie G Peter
- Department of Ophthalmology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland,Correspondence: Virginie G Peter, Department of Ophthalmology, Inselspital, Bern University Hospital, University of Bern, Freiburgstrasse 15, Bern, 3010, Switzerland, Email
| | - Sophia C Morandi
- Department of Ophthalmology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland,Department for BioMedical Research, University of Bern, Bern, Switzerland
| | - Elio L Herzog
- Department of Ophthalmology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland,Department for BioMedical Research, University of Bern, Bern, Switzerland,Graduate School for Cellular and Biomedical Sciences, University of Bern, Bern, Switzerland
| | - Martin S Zinkernagel
- Department of Ophthalmology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland,Department for BioMedical Research, University of Bern, Bern, Switzerland
| | - Denise C Zysset-Burri
- Department of Ophthalmology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland,Department for BioMedical Research, University of Bern, Bern, Switzerland
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Das S, Ahmad Z, Suryawanshi A, Kumar A. 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] [What about the content of this article? (0)] [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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Ling S, You Z, Li Y, Zhang J, Zhao S, He Y, Chen X. The role of γδ T17 cells in cardiovascular disease. J Leukoc Biol 2022; 112:1649-1661. [PMID: 36073777 DOI: 10.1002/jlb.3mr0822-761rr] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 06/23/2022] [Accepted: 08/03/2022] [Indexed: 01/04/2023] Open
Abstract
Due to the ability of γδ T cells to bridge adaptive and innate immunity, γδ T cells can respond to a variety of molecular cues and acquire the ability to induce a variety of cytokines such as IL-17 family, IFN-γ, IL-4, and IL-10. IL-17+ γδ T cells (γδ T17 cells) populations have recently received considerable interest as they are the major early source of IL-17A in many immune response models. However, the exact mechanism of γδ T17 cells is still poorly understood, especially in the context of cardiovascular disease (CVD). CVD is the leading cause of death in the world, and it tends to be younger. Here, we offer a review of the cardiovascular inflammatory and immune functions of γδ T17 cells in order to understand their role in CVD, which may be the key to developing new clinical applications.
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Affiliation(s)
- Shaoxue Ling
- College of Pharmaceutical Engineering of Traditional Chinese Medicine, Tianjin University of Traditional Chinese Medicine, 10 Poyanghu Road, Tianjin, 301617, China
| | - Zonghao You
- College of Pharmaceutical Engineering of Traditional Chinese Medicine, Tianjin University of Traditional Chinese Medicine, 10 Poyanghu Road, Tianjin, 301617, China
| | - Yang Li
- School of Chinese Materia Medica, Tianjin University of Traditional Chinese Medicine, 10 Poyanghu Road, Tianjin, 301617, China
| | - Jian Zhang
- School of Chinese Materia Medica, Tianjin University of Traditional Chinese Medicine, 10 Poyanghu Road, Tianjin, 301617, China
| | - Shuwu Zhao
- School of Intergrative Medicine, Tianjin University of Traditional Chinese Medicine, 10 Poyanghu Road, Tianjin, 301617, China
| | - Yongzhi He
- College of Pharmaceutical Engineering of Traditional Chinese Medicine, Tianjin University of Traditional Chinese Medicine, 10 Poyanghu Road, Tianjin, 301617, China
| | - Xi Chen
- College of Pharmaceutical Engineering of Traditional Chinese Medicine, Tianjin University of Traditional Chinese Medicine, 10 Poyanghu Road, Tianjin, 301617, China
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Konda N, Chakrabarti S, Garg P, Willcox MDP. Association of Single-Nucleotide Polymorphisms in Interleukin Genes with Microbial Keratitis in a South Indian Population. Pathogens 2022; 11:1387. [PMID: 36422638 PMCID: PMC9692714 DOI: 10.3390/pathogens11111387] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Revised: 11/12/2022] [Accepted: 11/19/2022] [Indexed: 05/03/2024] Open
Abstract
BACKGROUND To examine the relationship between single-nucleotide polymorphisms (SNPs) in interleukin (IL) genes and keratitis and its clinical manifestations. METHODS SNPs in IL1B, IL6, CXCL8, IL10, and IL12B were analysed. Differences in frequencies of alleles, genotypes and haplotypes between cases and controls as well as associations between SNPs and clinical variables were calculated by χ2 tests with odds ratios. RESULTS The minor homologous genotype in IL1B rs16944 (p = 0.036; odds ratio (OR) = 2.063, 95% confidence interval (CI): 1.048-4.061) and CXCL8 rs4073 (p = 0.041; OR = 0.463, 95% CI: 0.224-0.956) and the heterologous genotypes in IL6 rs1800795 (p = 0.046; OR = 0.563, 95% CI: 0.326-0.972) and IL12B rs2569254 (p = 0.0446; OR = 0.557, 95% CI: 0.314-0.989) or rs730691 (p = 0.0051; OR = 0.451, 95% CI: 0.260-0.784) were associated with keratitis. The minor genotype of rs16944 was associated with severe infection (p = 0.046). The heterologous genotype in rs2569254 was associated with hospital admission, photophobia, and mode of contact lens wear (p ≤ 0.041). The heterologous genotype in rs730691 was associated with blurred vision, discharge, anterior chamber reaction, and mode of wear (p ≤ 0.047). CONCLUSIONS This study demonstrates that SNPs in IL1B and CXCL8 are associated with risk of developing keratitis. The study also found relationships between SNPs and clinical measures of keratitis. The potential for ethnic differences in frequency of SNPs and their association with keratitis should be followed up using different populations.
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Affiliation(s)
- Nagaraju Konda
- School of Optometry and Vision Science, University of New South Wales, Sydney 2052, Australia
- Brien Holden Vision Institute, Sydney 2052, Australia
- School of Medical Sciences, University of Hyderabad, Hyderabad 500046, Telangana, India
| | - Subhabrata Chakrabarti
- Brien Holden Eye Research Centre, L. V. Prasad Eye Institute, Hyderabad 500034, Telangana, India
| | - Prashant Garg
- The Cornea Institute, L. V. Prasad Eye Institute, Hyderabad, Telangana 500034, India
| | - Mark D. P. Willcox
- School of Optometry and Vision Science, University of New South Wales, Sydney 2052, Australia
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Drummond RA, Desai JV, Hsu AP, Oikonomou V, Vinh DC, Acklin JA, Abers MS, Walkiewicz MA, Anzick SL, Swamydas M, Vautier S, Natarajan M, Oler AJ, Yamanaka D, Mayer-Barber KD, Iwakura Y, Bianchi D, Driscoll B, Hauck K, Kline A, Viall NS, Zerbe CS, Ferré EM, Schmitt MM, DiMaggio T, Pittaluga S, Butman JA, Zelazny AM, Shea YR, Arias CA, Ashbaugh C, Mahmood M, Temesgen Z, Theofiles AG, Nigo M, Moudgal V, Bloch KC, Kelly SG, Whitworth MS, Rao G, Whitener CJ, Mafi N, Gea-Banacloche J, Kenyon LC, Miller WR, Boggian K, Gilbert A, Sincock M, Freeman AF, Bennett JE, Hasbun R, Mikelis CM, Kwon-Chung KJ, Belkaid Y, Brown GD, Lim JK, Kuhns DB, Holland SM, Lionakis MS. Human Dectin-1 deficiency impairs macrophage-mediated defense against phaeohyphomycosis. J Clin Invest 2022; 132:e159348. [PMID: 36377664 PMCID: PMC9663159 DOI: 10.1172/jci159348] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Accepted: 09/21/2022] [Indexed: 11/16/2022] Open
Abstract
Subcutaneous phaeohyphomycosis typically affects immunocompetent individuals following traumatic inoculation. Severe or disseminated infection can occur in CARD9 deficiency or after transplantation, but the mechanisms protecting against phaeohyphomycosis remain unclear. We evaluated a patient with progressive, refractory Corynespora cassiicola phaeohyphomycosis and found that he carried biallelic deleterious mutations in CLEC7A encoding the CARD9-coupled, β-glucan-binding receptor, Dectin-1. The patient's PBMCs failed to produce TNF-α and IL-1β in response to β-glucan and/or C. cassiicola. To confirm the cellular and molecular requirements for immunity against C. cassiicola, we developed a mouse model of this infection. Mouse macrophages required Dectin-1 and CARD9 for IL-1β and TNF-α production, which enhanced fungal killing in an interdependent manner. Deficiency of either Dectin-1 or CARD9 was associated with more severe fungal disease, recapitulating the human observation. Because these data implicated impaired Dectin-1 responses in susceptibility to phaeohyphomycosis, we evaluated 17 additional unrelated patients with severe forms of the infection. We found that 12 out of 17 carried deleterious CLEC7A mutations associated with an altered Dectin-1 extracellular C-terminal domain and impaired Dectin-1-dependent cytokine production. Thus, we show that Dectin-1 and CARD9 promote protective TNF-α- and IL-1β-mediated macrophage defense against C. cassiicola. More broadly, we demonstrate that human Dectin-1 deficiency may contribute to susceptibility to severe phaeohyphomycosis by certain dematiaceous fungi.
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Affiliation(s)
| | | | - Amy P. Hsu
- Immunopathogenesis Section, Laboratory of Clinical Immunology and Microbiology (LCIM), National Institute of Allergy and Infectious Diseases (NIAID), NIH, Bethesda, Maryland, USA
| | | | - Donald C. Vinh
- Division of Infectious Diseases, McGill University Health Centre (MUHC), and Infectious Disease Susceptibility Program, Research Institute-MUHC, Montreal, Quebec, Canada
| | - Joshua A. Acklin
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | | | | | - Sarah L. Anzick
- Research Technologies Branches, NIAID, NIH, Hamilton, Montana, USA
| | | | | | | | - Andrew J. Oler
- Bioinformatics and Computational Biosciences Branch, Office of Cyber Infrastructure and Computational Biology, NIAID, NIH, Bethesda, Maryland, USA
| | - Daisuke Yamanaka
- Laboratory for Immunopharmacology of Microbial Products, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Tokyo, Japan
| | | | - Yoichiro Iwakura
- Research Institute for Biomedical Sciences, Tokyo University of Science, Chiba, Japan
| | - David Bianchi
- National Institute of Deafness and Other Communication Disorders (NIDCD), NIH, Bethesda, Maryland, USA
| | - Brian Driscoll
- National Institute of Deafness and Other Communication Disorders (NIDCD), NIH, Bethesda, Maryland, USA
| | - Ken Hauck
- National Institute of Deafness and Other Communication Disorders (NIDCD), NIH, Bethesda, Maryland, USA
| | | | | | - Christa S. Zerbe
- Immunopathogenesis Section, Laboratory of Clinical Immunology and Microbiology (LCIM), National Institute of Allergy and Infectious Diseases (NIAID), NIH, Bethesda, Maryland, USA
| | | | | | | | - Stefania Pittaluga
- Laboratory of Pathology, Center for Cancer Research, National Cancer Institute (NCI), Bethesda, Maryland, USA
| | | | - Adrian M. Zelazny
- Department of Laboratory Medicine, NIH Clinical Center, NIH, Bethesda, Maryland, USA
| | - Yvonne R. Shea
- Department of Laboratory Medicine, NIH Clinical Center, NIH, Bethesda, Maryland, USA
| | - Cesar A. Arias
- Division of Infectious Diseases, Houston Methodist Hospital, Houston, Texas, USA
- Center for Infectious Research, Houston Methodist Research Institute, Houston, Texas, USA
| | - Cameron Ashbaugh
- Division of Infectious Diseases, UCSF, San Francisco, California, USA
| | - Maryam Mahmood
- Division of Infectious Diseases, Mayo Clinic, Rochester, Minnesota, USA
| | - Zelalem Temesgen
- Division of Hospital Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | | | - Masayuki Nigo
- Division of Infectious Diseases, The University of Texas Health Science Center at Houston, Houston, Texas, USA
| | - Varsha Moudgal
- Department of Internal Medicine, St. Joseph Mercy Hospital, Ann Arbor, Michigan, USA
| | - Karen C. Bloch
- Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Sean G. Kelly
- Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | | | - Ganesh Rao
- Department of Neurosurgery, Baylor College of Medicine, Houston, Texas, USA
| | - Cindy J. Whitener
- Division of Infectious Diseases, Penn State Milton S. Hershey Medical Center, Hershey, Pennsylvania, USA
| | - Neema Mafi
- Division of Infectious Diseases, Mayo Clinic Hospital, Phoenix, Arizona, USA
| | | | - Lawrence C. Kenyon
- Department of Pathology, Thomas Jefferson University, Philadelphia, Pennsylvania, USA
| | - William R. Miller
- Division of Infectious Diseases, Houston Methodist Hospital, Houston, Texas, USA
- Center for Infectious Research, Houston Methodist Research Institute, Houston, Texas, USA
| | - Katia Boggian
- Division of Infectious Diseases and Hospital Epidemiology, Cantonal Hospital St. Gallen, Switzerland
| | - Andrea Gilbert
- Department of Pathology, University of Texas Health San Antonio, San Antonio, Texas, USA
| | | | - Alexandra F. Freeman
- Immunopathogenesis Section, Laboratory of Clinical Immunology and Microbiology (LCIM), National Institute of Allergy and Infectious Diseases (NIAID), NIH, Bethesda, Maryland, USA
| | | | - Rodrigo Hasbun
- Department of Internal Medicine, University of Texas Health Science Center, Houston, Texas, USA
| | - Constantinos M. Mikelis
- Department of Pharmaceutical Sciences, School of Pharmacy, Texas Tech University Health Sciences Center, Amarillo, Texas, USA
- Department of Pharmacy, University of Patras, Patras, Greece
| | | | - Yasmine Belkaid
- Metaorganism Immunity Section, Laboratory of Host Immunity and Microbiome, NIAID, NIH, Bethesda, Maryland, USA
| | - Gordon D. Brown
- Medical Research Council Centre for Medical Mycology, University of Exeter, Exeter, United Kingdom
| | - Jean K. Lim
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Douglas B. Kuhns
- Neutrophil Monitoring Laboratory, Applied/Developmental Research Directorate, Frederick National Laboratory for Cancer Research, Frederick, Maryland, USA
| | - Steven M. Holland
- Immunopathogenesis Section, Laboratory of Clinical Immunology and Microbiology (LCIM), National Institute of Allergy and Infectious Diseases (NIAID), NIH, Bethesda, Maryland, USA
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Li L, Li Y, Zhu X, Wu B, Tang Z, Wen H, Yuan J, Zheng Q, Chen W. Conjunctiva Resident γδ T Cells Expressed High Level of IL-17A and Promoted the Severity of Dry Eye. Invest Ophthalmol Vis Sci 2022; 63:13. [PMID: 36350619 PMCID: PMC9652718 DOI: 10.1167/iovs.63.12.13] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Purpose Conjunctival inflammation promotes ocular surface disorders in dry eye disease (DED). Here we identified γδ T cells as the predominant source of IL-17A in the murine conjunctiva and assessed their contribution to the pathogenesis of DED. Methods We enrolled 22 patients with DED, and analyzed the proportion of γδ T cells in the conjunctival epithelial samples by flow cytometry. Adult C57Bl/6 wild-type and TCRδ−/− mice were used to induce DED models to investigate the role of γδ T cells. The characteristics of immune cell infiltration and the expression of immune-related cytokines or markers in mouse conjunctiva were analyzed by flow cytometry, Western blot, and quantitative polymerase chain reaction. Results The proportion of γδ T cells in the human DED conjunctiva is significantly higher in patients with severe corneal epithelial defects than in mild ones, which is consistently observed in the murine DED model. Further, a high level of IL-17A but not IFN-γ is detected in the conjunctiva of mice. The increased murine IL-17A–producing cells on the conjunctiva are identified as γδ T cells predominantly and Th17 cells to a lesser extent. Ablation of γδ T cells by antibody depletion or genetic deletion of TCRδ alleviates ocular surface damage in the murine DED model. Conclusions Our studies evaluate human and experimental murine DED for evidence of γδ T-cell–mediated inflammation and highlight a potential therapeutic synergy by targeting IL-17 and γδ T cells in DED treatment.
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Affiliation(s)
- Ling Li
- School of Ophthalmology and Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China
- The Affiliated Ningbo Eye Hospital of Wenzhou Medical University, Ningbo, Zhejiang, China
| | - Yanxiao Li
- School of Ophthalmology and Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Xinhao Zhu
- School of Ophthalmology and Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Biao Wu
- Shaoxing people's hospital, Shaoxing, Zhejiang, China
| | - Zhuo Tang
- School of Ophthalmology and Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Han Wen
- School of Ophthalmology and Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Jianshu Yuan
- The Affiliated Ningbo Eye Hospital of Wenzhou Medical University, Ningbo, Zhejiang, China
| | - Qinxiang Zheng
- School of Ophthalmology and Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China
- The Affiliated Ningbo Eye Hospital of Wenzhou Medical University, Ningbo, Zhejiang, China
| | - Wei Chen
- School of Ophthalmology and Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China
- The Affiliated Ningbo Eye Hospital of Wenzhou Medical University, Ningbo, Zhejiang, China
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Vernhardsdottir RR, Magno MS, Hynnekleiv L, Lagali N, Dartt DA, Vehof J, Jackson CJ, Utheim TP. Antibiotic treatment for dry eye disease related to meibomian gland dysfunction and blepharitis – A review. Ocul Surf 2022; 26:211-21. [DOI: 10.1016/j.jtos.2022.08.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Revised: 08/18/2022] [Accepted: 08/30/2022] [Indexed: 11/19/2022]
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Cavuoto KM, Zhu AY. The Role of the Ocular Surface Microbiome (OSM) in Diseases of the Anterior Segment and Ocular Surface. Curr Ophthalmol Rep 2022. [DOI: 10.1007/s40135-022-00294-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Abstract
Recently, increasing studies have emphasized the importance of commensal bacteria in humans, including microbiota in the oral cavity, gut, vagina, or skin. Ocular surface microbiota (OSM) is gaining great importance as new methodologies for bacteria DNA sequencing have been published. This review outlines the current understanding and investigation of OSM and introduces the new concept of the gut–eye axis. Moreover, we have collected current studies that focus on the relationship between ophthalmic infectious disease and alterations in the OSM or human gut microbiota. Finally, we discuss the current application of probiotics in ophthalmic infectious disease, its limitations to date, and futural directions.
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Affiliation(s)
- Ming-Cheng Chiang
- niChe Lab for Stem Cell and Regenerative Medicine, Department of Biochemical Science and Technology, National Taiwan University, Taipei, Taiwan
| | - Edward Chern
- niChe Lab for Stem Cell and Regenerative Medicine, Department of Biochemical Science and Technology, National Taiwan University, Taipei, Taiwan
- Research Center for Developmental Biology and Regenerative Medicine, National Taiwan University, Taipei, Taiwan
- *Correspondence: Edward Chern
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Chang CCJ, Somohano K, Zemsky C, Uhlemann AC, Liebmann J, Cioffi GA, Al-Aswad LA, Lynch SV, Winn BJ. Topical Glaucoma Therapy Is Associated With Alterations of the Ocular Surface Microbiome. Invest Ophthalmol Vis Sci 2022; 63:32. [PMID: 36036910 PMCID: PMC9434984 DOI: 10.1167/iovs.63.9.32] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Purpose To investigate the ocular surface microbiome of patients with unilateral or asymmetric glaucoma being treated with topical ophthalmic medications in one eye and to determine whether microbial community changes were related to measures of ocular surface disease. Methods V3-V4 16S rRNA sequencing was conducted on ocular surface swabs collected from both eyes of 17 subjects: 10 patients with asymmetric/unilateral glaucoma using topical glaucoma therapy on only one eye and seven age-matched, healthy controls with no history of ocular disease or eyedrop use. Samples were categorized into three groups: patients’ glaucomatous eye treated with eyedrops, patients’ contralateral eye without eyedrops, and healthy control eyes. Comparisons were made for microbial diversity and composition, with differences in composition tested for association with ocular surface disease measures including tear meniscus height, tear break-up time, and Dry Eye Questionnaire. Results Samples obtained from the patients’ treated and untreated eyes both had significantly greater alpha-diversity and relative abundance of gram-negative organisms compared to healthy controls. The microbial composition of patient eyes was associated with decreased tear meniscus height and tear break-up time, whereas metagenomic predictions, based on 16S rRNA data, suggested increased synthesis of lipopolysaccharide. Conclusions The ocular surface microbiome of patients taking unilateral preserved glaucoma drops is characterized by a highly diverse array of gram-negative bacteria that is significantly different from the predominantly gram-positive microbes detected on healthy control eyes. These compositional differences were associated with decreased tear film measures and distinct inferred protein synthesis pathways, suggesting a potential link between microbial alterations and ocular surface inflammation.
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Affiliation(s)
- Chih-Chiun J Chang
- Department of Ophthalmology, University of California San Francisco, San Francisco, California, United States
| | - Karina Somohano
- Department of Ophthalmology, Columbia University Medical Center, New York-Presbyterian Hospital, New York, New York, United States
| | - Christine Zemsky
- Department of Ophthalmology, Columbia University Medical Center, New York-Presbyterian Hospital, New York, New York, United States
| | - Anne-Catrin Uhlemann
- Department of Internal Medicine, Division of Infectious Disease, Columbia University Medical Center, New York-Presbyterian Hospital, New York, New York, United States
| | - Jeffrey Liebmann
- Department of Ophthalmology, Columbia University Medical Center, New York-Presbyterian Hospital, New York, New York, United States
| | - George A Cioffi
- Department of Ophthalmology, Columbia University Medical Center, New York-Presbyterian Hospital, New York, New York, United States
| | - Lama A Al-Aswad
- Department of Ophthalmology, Columbia University Medical Center, New York-Presbyterian Hospital, New York, New York, United States.,Department of Ophthalmology, New York University Langone Health, New York, New York, United States
| | - Susan V Lynch
- Division of Gastroenterology, Department of Medicine, University of California, San Francisco, San Francisco, California, United States
| | - Bryan J Winn
- Department of Ophthalmology, University of California San Francisco, San Francisco, California, United States.,Department of Ophthalmology, Columbia University Medical Center, New York-Presbyterian Hospital, New York, New York, United States.,Ophthalmology Section, Surgical Service, San Francisco Veterans Affairs Medical Center, San Francisco, California, United States
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Ji X, Dong K, Pu J, Yang J, Zhang Z, Ning X, Ma Q, Kang Z, Xu J, Sun B. Comparison of the ocular surface microbiota between thyroid-associated ophthalmopathy patients and healthy subjects. Front Cell Infect Microbiol 2022; 12:914749. [PMID: 35959376 PMCID: PMC9360483 DOI: 10.3389/fcimb.2022.914749] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Accepted: 07/04/2022] [Indexed: 12/02/2022] Open
Abstract
Purpose Thyroid-associated ophthalmopathy (TAO) is a chronic autoimmune disease. In this study, high-throughput sequencing was used to investigate the diversity and composition of the ocular microbiota in patients with TAO. Methods Patients with TAO did not receive treatment for the disease and did not have exposed keratitis. Patients with TAO (TAO group) and healthy individuals (control group) were compared. All samples were swabbed at the conjunctival vault of the lower eyelid. The V3 to V4 region of the 16S rDNA was amplified using polymerase chain reaction and sequenced on the Illumina HiSeq 2500 Sequencing Platform. Statistical analysis was performed to analyze the differences between the groups and the correlation between ocular surface microbiota and the disease. The ocular surface microbiota of patients and healthy individuals were cultured. Results The ocular surface microbiota structure of TAO patients changed significantly. The average relative abundance of Bacillus and Brevundimonas increased significantly in the TAO group. Corynebacterium had a significantly decreased relative abundance (P<0.05). Paracoccus, Haemophilus, Lactobacillus, and Bifidobacterium were positively correlated with the severity of clinical manifestations or disease activity (P<0.05). Bacillus cereus and other opportunistic pathogens were obtained by culture from TAO patients. Conclusions This study found that the composition of ocular microbiota in patients with TAO was significantly different from that in healthy individuals. The ocular surface opportunistic pathogens, such as Bacillus, Brevundimonas, Paracoccus, and Haemophilus in TAO patients, increase the potential risk of ocular surface infection. The findings of this study provide a new avenue of research into the mechanism of ocular surface in TAO patients.
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Affiliation(s)
- Xuan Ji
- Shanxi Eye Hospital, Shanxi Province Key Laboratory of Ophthalmology, Taiyuan, China
| | - Kui Dong
- Shanxi Eye Hospital, Shanxi Province Key Laboratory of Ophthalmology, Taiyuan, China
| | - Ji Pu
- State Key Laboratory of Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Research Units of Discovery of Unknown Bacteria and Function (2018 RU010), Chinese Academy of Medical Sciences, Beijing, China
| | - Jing Yang
- State Key Laboratory of Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Research Units of Discovery of Unknown Bacteria and Function (2018 RU010), Chinese Academy of Medical Sciences, Beijing, China
| | - Zhaoxia Zhang
- Shanxi Eye Hospital, Shanxi Province Key Laboratory of Ophthalmology, Taiyuan, China
| | - Xiaoling Ning
- Shanxi Eye Hospital, Shanxi Province Key Laboratory of Ophthalmology, Taiyuan, China
| | - Qin Ma
- Shanxi Eye Hospital, Shanxi Province Key Laboratory of Ophthalmology, Taiyuan, China
| | - Zhiming Kang
- Shanxi Eye Hospital, Shanxi Province Key Laboratory of Ophthalmology, Taiyuan, China
| | - Jianguo Xu
- State Key Laboratory of Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Research Units of Discovery of Unknown Bacteria and Function (2018 RU010), Chinese Academy of Medical Sciences, Beijing, China
| | - Bin Sun
- Shanxi Eye Hospital, Shanxi Province Key Laboratory of Ophthalmology, Taiyuan, China
- *Correspondence: Bin Sun,
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Zarzuela JC, Reinoso R, Armentia A, Enríquez-de-Salamanca A, Corell A. Conjunctival Intraepithelial Lymphocytes, Lacrimal Cytokines and Ocular Commensal Microbiota: Analysis of the Three Main Players in Allergic Conjunctivitis. Front Immunol 2022; 13:911022. [PMID: 35935953 PMCID: PMC9351602 DOI: 10.3389/fimmu.2022.911022] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Accepted: 06/23/2022] [Indexed: 11/29/2022] Open
Abstract
Conjunctival intraepithelial lymphocytes, tear soluble molecules and commensal microbiota have important roles in the ocular mucosal immune response in healthy and diseased subjects. For the purpose of this study, the cellular and microbial populations of the conjunctiva and the lacrimal soluble molecules were analyzed to find the main biomarkers in allergic conjunctivitis. A total of 35 healthy subjects, 28 subjects with seasonal allergic conjunctivitis and 32 subjects with perennial allergic conjunctivitis were recruited to obtain peripheral blood, conjunctival brush cytology, tear fluid and microbiota samples. Flow cytometry for lymphocytes, multiplex bead assays for cytokines and high-throughput DNA sequencing for microbiome analysis were used. For perennial allergic conjunctivitis, an increased proportion of Th2 and NKT lymphocytes was found, while CD3+TCRγδ+ lymphocytes and double negative MAIT cells were decreased. In contrast, seasonal allergic conjunctivitis was distinguished by an increase in Th17 and Th22 cell proportions, while the Th1 cell proportion decreased. Among tear fluid, the vast majority of pro-inflammatory cytokines (especially Th2 and Th17 cytokines) in perennial allergies and MMP-9 together with IgA in seasonal allergies were increased. In contrast, TGF-β2 was decreased in both forms of conjunctivitis. Finally, fungal (Malassezia species) and bacterial (Kocuria and Propionobacterium acnes species) colonization were observed in the perennial allergic conjunctivitis group. These results provide the basis for the development of a disease profile for perennial allergic conjunctivitis and open the door to new therapeutic and diagnostic strategies.
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Affiliation(s)
| | - Roberto Reinoso
- Ocular Surface Group, Institute for Applied Ophthalmobiology (IOBA), University of Valladolid, Valladolid, Spain
- Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Madrid, Spain
| | - Alicia Armentia
- Department of Allergy, Hospital Universitario Río Hortega, University of Valladolid, Valladolid, Spain
| | - Amalia Enríquez-de-Salamanca
- Ocular Surface Group, Institute for Applied Ophthalmobiology (IOBA), University of Valladolid, Valladolid, Spain
- Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Madrid, Spain
| | - Alfredo Corell
- Department of Immunology, University of Valladolid, Valladolid, Spain
- Ocular Surface Group, Institute for Applied Ophthalmobiology (IOBA), University of Valladolid, Valladolid, Spain
- *Correspondence: Alfredo Corell,
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Fernández-Garayzábal JF, LaFrentz S, Casamayor A, Abarca E, Mohammed HH, Cuming RS, Arias CR, Domínguez L, Vela AI. Corynebacterium conjunctivae: A New Corynebacterium Species Isolated from the Ocular Surface of Healthy Horses. Animals (Basel) 2022; 12:ani12141827. [PMID: 35883374 PMCID: PMC9312174 DOI: 10.3390/ani12141827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Revised: 07/15/2022] [Accepted: 07/15/2022] [Indexed: 11/19/2022] Open
Abstract
Simple Summary The identification of commensal bacteria in normal eyes is relevant because they contribute to ocular defense mechanisms. Studies focused on identifying the normal ocular flora in horses confirm that Gram-positive bacteria are predominant, with the genus Corynebacterium being among the most frequently identified. However, identification at the species level is uncommon, which limits precise knowledge about the diversity of the corynebacterial species in equine eyes. The purpose of this study was to characterize some commensal Corynebacterium-like organisms recovered from the conjunctival sac of healthy adult horses using phenotypic, chemotaxonomic and molecular genetic methodologies. Based on the results obtained, we propose a new Corynebacterium species, Corynebacterium conjunctivae, as a commensal organism of the horse eye. Abstract Twenty-two unidentified Gram-positive, rod-shaped organisms were recovered from the conjunctival surface of apparently healthy horses and subjected to a polyphasic taxonomic analysis. Based on cellular morphology and biochemical criteria, the isolates were tentatively assigned to the genus Corynebacterium, although they did not match any recognized species. Comparative 16S rRNA gene sequencing studies demonstrated that all of the isolates were phylogenetically members of the genus Corynebacterium. The isolates shared 99.4 to 100% 16S rRNA gene sequence similarity among the strains and 96.5% similarity with Corynebacterium tapiri 2385/12T, which was the closest phylogenetically related species. The DNA G+C content was 58.4 mol%. The major fatty acids were C15:0, C16:0, C17:1ω8c and C18:1ω9c, while the predominant mycolic acids consisted of C30:0, C32:0 and C34:0. The isolates were distinguished from related Corynebacterium species by a number of phenotypic properties. On the basis of phenotypic and phylogenetic evidence, it is proposed that the unknown isolates from horses be classified in the genus Corynebacterium as Corynebacterium conjunctivae sp. nov. The type strain of C. conjunctivae is ICM19-01138T (DSM 109759T = CCUG 73728T).
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Affiliation(s)
- José F. Fernández-Garayzábal
- Centro de Vigilancia Sanitaria Veterinaria (VISAVET), Universidad Complutense, 28040 Madrid, Spain; (J.F.F.-G.); (A.C.); (L.D.)
- Department of Animal Health, Veterinary School, Complutense University, 28040 Madrid, Spain
| | - Stacey LaFrentz
- Department of Biological Sciences, Auburn University, Auburn, AL 36894, USA;
| | - Almudena Casamayor
- Centro de Vigilancia Sanitaria Veterinaria (VISAVET), Universidad Complutense, 28040 Madrid, Spain; (J.F.F.-G.); (A.C.); (L.D.)
| | - Eva Abarca
- Servei d’Oftalmologia, ARS Veterinaria, 08034 Barcelona, Spain;
| | - Haitham H. Mohammed
- Department of Aquatic Animal Medicine and Management, Faculty of Veterinary Medicine, Assiut University, Assiut 71526, Egypt;
| | | | - Cova R. Arias
- School of Fisheries, Aquaculture and Aquatic Sciences, Auburn University, Auburn, AL 36894, USA
| | - Lucas Domínguez
- Centro de Vigilancia Sanitaria Veterinaria (VISAVET), Universidad Complutense, 28040 Madrid, Spain; (J.F.F.-G.); (A.C.); (L.D.)
- Department of Animal Health, Veterinary School, Complutense University, 28040 Madrid, Spain
| | - Ana I. Vela
- Centro de Vigilancia Sanitaria Veterinaria (VISAVET), Universidad Complutense, 28040 Madrid, Spain; (J.F.F.-G.); (A.C.); (L.D.)
- Department of Animal Health, Veterinary School, Complutense University, 28040 Madrid, Spain
- Correspondence:
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Wang Y, Ding Y, Jiang X, Yang J, Li X. Bacteria and Dry Eye: A Narrative Review. J Clin Med 2022; 11:4019. [PMID: 35887783 PMCID: PMC9319739 DOI: 10.3390/jcm11144019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Revised: 06/17/2022] [Accepted: 07/04/2022] [Indexed: 11/17/2022] Open
Abstract
(1) Background: Dry eye is a multifactorial disease of the ocular surface, the incidence of which has been increasing sharply. The pathogenesis of dry eye, especially in terms of the bacterial flora, has drawn great attention. Additionally, the potential treatment methods need to be explored. (2) Methods: We reviewed more than 100 studies and summarized them briefly in a review. (3) Results: We summarized the bacterial communities found on the ocular surface in the general population and patients with dry eye and found a relationship between dry eye and antibiotic therapy. We identified the possible mechanisms of bacteria in the development of dry eye by discussing factors such as the destruction of the antibacterial barrier, infectious diseases, microbiome homeostasis, inflammatory factors on the ocular surface and vitamin deficiency. (4) Conclusion: We systematically reviewed the recent studies to summarize the bacterial differences between patients with dry eye and the general population and brought up several possible mechanisms and possible treatment targets.
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Park S, Shin H, Kim S, Lee T, Lee H, Nam K, Yoon W, Kim H, Seo Y, Won Y, Kwon H. Distribution of Corynebacterium Species and Comparative Results of Diagnostic Methods for Identifying Corynebacterium in Experimental Mice in Korea. Vet Sci 2022; 9:vetsci9070328. [PMID: 35878345 PMCID: PMC9318398 DOI: 10.3390/vetsci9070328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Revised: 06/21/2022] [Accepted: 06/25/2022] [Indexed: 12/03/2022] Open
Abstract
Simple Summary Experimental mice are the most commonly used laboratory animals for biomedical research and comparative studies. However, microbial infection may alter the mouse phenotype and confound interpretation results. The genus Corynebacterium, Gram-positive diphtheroid rod-shaped bacteria, induces severe diseases, such as hyperkeratosis and pseudotuberculosis, in immunodeficient mice. In this report, we described the population of Corynebacterium spp. isolated from laboratory mice in Korea using different approaches, comparing the accuracy and problems associated with each method. When identified based on molecular methods such as 16S rRNA and rpoB gene sequence analysis, the main Corynebacterium species were C. mastitidis (44.8%), C. bovis (25.5%), C. lowii (21.2%), and C. amycolatum (8.5%). In addition, matrix-assisted laser desorption/ionization–time of flight mass spectrometry (MALDI-TOF MS) yielded results that were 77.9% identical to the molecular results, whereas biochemical methods showed only 15.5% identical to molecular identification. Collectively, our findings indicate that the different results may be obtained depending on the method used to identify Corynebacterium isolated from experimental mice, highlighting the importance of selecting an appropriate Corynebacterium identification method in obtaining accurate identification results. This result will help to increase the reliability of Corynebacterium diagnosis result from experimental mice. Abstract The genus Corynebacterium, composed of Gram-positive diphtheroid rod-shaped bacteria, induces severe diseases, such as Corynebacterium-associated hyperkeratosis and pseudotuberculosis, in immunodeficient mice. We isolated and identified a total of 165 strains of Corynebacterium species from experimental mice in Korean laboratories, diagnosed using several methods. When identified based on molecular methods, namely, 16S rRNA and rpoB gene sequence analysis, the main Corynebacterium species isolated in Korean laboratory mice were C. mastitidis (44.8%, n = 74), C. bovis (25.5%, n = 42), C. lowii (21.2%, n = 35), and C. amycolatum (8.5%, n = 14). Diagnoses were also performed using matrix-assisted laser desorption/ionization–time of flight mass spectrometry (MALDI-TOF MS) and biochemical methods. MALDI-TOF MS yielded results that were 77.9% identical to the molecular identification results, whereas biochemical methods showed only 15.5% identical to molecular identification, partly owing to difficulties in distinguishing among C. mastitidis strains. Collectively, our findings indicate that molecular biological methods are better suited for detecting and identifying Corynebacterium species candidates isolated from mice than biochemical methods. Because of limitations associated with the use of MALDI-TOF MS, more precise results will be obtained by complementing this approach with other methods when used for rapid identification testing.
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Affiliation(s)
- Sehee Park
- Laboratory Animal Resource Center, Korea Research Institute of Biology and Biotechnology, 30, Yeongudanji-ro, Cheongwon-gu, Cheongju-si 28116, Korea; (S.P.); (H.S.); (S.K.); (T.L.); (H.L.); (K.N.); (W.Y.); (H.K.); (Y.S.)
| | - Hijo Shin
- Laboratory Animal Resource Center, Korea Research Institute of Biology and Biotechnology, 30, Yeongudanji-ro, Cheongwon-gu, Cheongju-si 28116, Korea; (S.P.); (H.S.); (S.K.); (T.L.); (H.L.); (K.N.); (W.Y.); (H.K.); (Y.S.)
| | - Sangwoon Kim
- Laboratory Animal Resource Center, Korea Research Institute of Biology and Biotechnology, 30, Yeongudanji-ro, Cheongwon-gu, Cheongju-si 28116, Korea; (S.P.); (H.S.); (S.K.); (T.L.); (H.L.); (K.N.); (W.Y.); (H.K.); (Y.S.)
| | - Teakchang Lee
- Laboratory Animal Resource Center, Korea Research Institute of Biology and Biotechnology, 30, Yeongudanji-ro, Cheongwon-gu, Cheongju-si 28116, Korea; (S.P.); (H.S.); (S.K.); (T.L.); (H.L.); (K.N.); (W.Y.); (H.K.); (Y.S.)
| | - Haejin Lee
- Laboratory Animal Resource Center, Korea Research Institute of Biology and Biotechnology, 30, Yeongudanji-ro, Cheongwon-gu, Cheongju-si 28116, Korea; (S.P.); (H.S.); (S.K.); (T.L.); (H.L.); (K.N.); (W.Y.); (H.K.); (Y.S.)
| | - Kihoan Nam
- Laboratory Animal Resource Center, Korea Research Institute of Biology and Biotechnology, 30, Yeongudanji-ro, Cheongwon-gu, Cheongju-si 28116, Korea; (S.P.); (H.S.); (S.K.); (T.L.); (H.L.); (K.N.); (W.Y.); (H.K.); (Y.S.)
| | - Wonkee Yoon
- Laboratory Animal Resource Center, Korea Research Institute of Biology and Biotechnology, 30, Yeongudanji-ro, Cheongwon-gu, Cheongju-si 28116, Korea; (S.P.); (H.S.); (S.K.); (T.L.); (H.L.); (K.N.); (W.Y.); (H.K.); (Y.S.)
| | - Hyoungchin Kim
- Laboratory Animal Resource Center, Korea Research Institute of Biology and Biotechnology, 30, Yeongudanji-ro, Cheongwon-gu, Cheongju-si 28116, Korea; (S.P.); (H.S.); (S.K.); (T.L.); (H.L.); (K.N.); (W.Y.); (H.K.); (Y.S.)
| | - Youngwon Seo
- Laboratory Animal Resource Center, Korea Research Institute of Biology and Biotechnology, 30, Yeongudanji-ro, Cheongwon-gu, Cheongju-si 28116, Korea; (S.P.); (H.S.); (S.K.); (T.L.); (H.L.); (K.N.); (W.Y.); (H.K.); (Y.S.)
| | - Youngsuk Won
- Laboratory Animal Resource Center, Korea Research Institute of Biology and Biotechnology, 30, Yeongudanji-ro, Cheongwon-gu, Cheongju-si 28116, Korea; (S.P.); (H.S.); (S.K.); (T.L.); (H.L.); (K.N.); (W.Y.); (H.K.); (Y.S.)
- Correspondence: (Y.W.); (H.K.)
| | - Hyojung Kwon
- Department of Veterinary Pathology, College of Veterinary Medicine, Chungnam National University, 99, Daehak-ro, Yuseong-gu, Daejeon 34134, Korea
- Correspondence: (Y.W.); (H.K.)
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Datta A, Lee J, Truong T, Evans DJ, Fleiszig SMJ. Topical antibiotics reduce CD11c+ cell numbers in the healthy murine cornea and modulate their response to contact lens wear. Sci Rep 2022; 12:10655. [PMID: 35739166 PMCID: PMC9226138 DOI: 10.1038/s41598-022-14847-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Accepted: 06/13/2022] [Indexed: 11/21/2022] Open
Abstract
Previously we reported contact lens-induced CD11c+ cell responses in healthy mouse corneas, a phenomenon that also occurs in humans. To test involvement of ocular-associated bacteria, the impact of topical antibiotics on corneal CD11c+ cell populations during 24 h of lens wear was examined. Corneas were treated with gentamicin and ofloxacin (0.3%) or gentamicin alone, some also treated prior to lens wear (24 h). Contralateral PBS-treated eyes served as controls. CD11c-YFP (Yellow Fluorescent Protein) mice allowed CD11c+ cell visualization. Viable bacteria, on the ocular surface or contact lens, were labeled using FISH (16S rRNA-targeted probe) or click-chemistry (alkDala). Antibiotic treatment reduced baseline CD11c+ cell numbers without lens wear and suppressed CD11c+ cell responses to lens wear if corneas were both pretreated and treated during wear. Few bacteria colonized corneas or lenses under any circumstances. Conjunctival commensals were significantly reduced by antibiotics with or without lens wear, but minimally impacted by lens wear alone. Deliberate inoculation with conjunctival commensals triggered CD11c+ cell responses irrespective of antibiotic pretreatment. These results suggest that while lens wear does not necessarily increase quantifiable numbers of conjunctival commensals, those neutralized by antibiotics play a role in lens-associated CD11c+ cell responses and maintaining baseline CD11c+ cell populations.
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Affiliation(s)
- Ananya Datta
- Herbert Wertheim School of Optometry & Vision Science, University of California, Berkeley, CA, 94720, USA
| | - Justin Lee
- Herbert Wertheim School of Optometry & Vision Science, University of California, Berkeley, CA, 94720, USA
| | - Tiffany Truong
- Herbert Wertheim School of Optometry & Vision Science, University of California, Berkeley, CA, 94720, USA
| | - David J Evans
- Herbert Wertheim School of Optometry & Vision Science, University of California, Berkeley, CA, 94720, USA.,College of Pharmacy, Touro University California, Vallejo, CA, USA
| | - Suzanne M J Fleiszig
- Herbert Wertheim School of Optometry & Vision Science, University of California, Berkeley, CA, 94720, USA. .,Graduate Groups in Vision Science, Microbiology, and Infectious Diseases and Immunity, University of California, Berkeley, CA, USA.
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Nagarajan V, St Leger AJ, Zhang A, Silver P, Caspi RR. Draft Reference Genome Sequence of Corynebacterium mastitidis RC, an Ocular Commensal, Isolated from Mouse Conjunctiva. Microbiol Resour Announc 2022; 11:e0018722. [PMID: 35536012 DOI: 10.1128/mra.00187-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Here, we report the genome sequence of a protective commensal, Corynebacterium mastitidis RC, isolated from mouse conjunctiva. The C. mastitidis RC genome sequence is 2,153,054 bp in size and 96.95% complete, and we believe that it can contribute to the understanding of the functional immune attributes of the ocular commensal microbiome.
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Wani AK, Roy P, Kumar V, Mir TUG. Metagenomics and artificial intelligence in the context of human health. Infect Genet Evol 2022; 100:105267. [PMID: 35278679 DOI: 10.1016/j.meegid.2022.105267] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Revised: 03/03/2022] [Accepted: 03/04/2022] [Indexed: 12/12/2022]
Abstract
Human microbiome is ubiquitous, dynamic, and site-specific consortia of microbial communities. The pathogenic nature of microorganisms within human tissues has led to an increase in microbial studies. Characterization of genera, like Streptococcus, Cutibacterium, Staphylococcus, Bifidobacterium, Lactococcus and Lactobacillus through culture-dependent and culture-independent techniques has been reported. However, due to the unique environment within human tissues, it is difficult to culture these microorganisms making their molecular studies strenuous. MGs offer a gateway to explore and characterize hidden microbial communities through a culture-independent mode by direct DNA isolation. By function and sequence-based MGs, Scientists can explore the mechanistic details of numerous microbes and their interaction with the niche. Since the data generated from MGs studies is highly complex and multi-dimensional, it requires accurate analytical tools to evaluate and interpret the data. Artificial intelligence (AI) provides the luxury to automatically learn the data dimensionality and ease its complexity that makes the disease diagnosis and disease response easy, accurate and timely. This review provides insight into the human microbiota and its exploration and expansion through MG studies. The review elucidates the significance of MGs in studying the changing microbiota during disease conditions besides highlighting the role of AI in computational analysis of MG data.
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Affiliation(s)
- Atif Khurshid Wani
- Department of Biotechnology, School of Bioengineering and Biosciences, Lovely Professional University, Punjab 144411, India
| | - Priyanka Roy
- Department of Basic and Applied Sciences, National Institute of Food Technology Entrepreneurship and Management, Sonipat 131 028, Haryana, India
| | - Vijay Kumar
- Department of Basic and Applied Sciences, National Institute of Food Technology Entrepreneurship and Management, Sonipat 131 028, Haryana, India.
| | - Tahir Ul Gani Mir
- Department of Biotechnology, School of Bioengineering and Biosciences, Lovely Professional University, Punjab 144411, India
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Asadi-Amoli F, Abedinifar Z, Nozarian Z, Heidary F, Memar MHSA, Nezamabadi A, Gharebaghi R, Roustaei N, Parvizi M. Microbiological Profile of Ocular Infection: A Large Retrospective Study. Iran J Public Health 2022; 51:1419-1427. [PMID: 36447968 PMCID: PMC9659533 DOI: 10.18502/ijph.v51i6.9699] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Accepted: 01/16/2022] [Indexed: 06/16/2023]
Abstract
BACKGROUND We aimed to elucidate the pathogenic bacterial and fungal profiles of specimens obtained from suspected ocular infections at Farabi Eye Tertiary Referral Hospital, Tehran, Iran. METHODS In this cross-sectional study, we collected data from ocular specimens taken during the seven-year period of 2011 to 2018, and the results were then retrospectively analyzed. Samples had been obtained from patients who were investigated for ocular infections. RESULTS Overall, 16,656 ocular samples were evaluated. The mean patient age was 48.31 ± 26.62 years. Most patients were men (60.33%), and men in the 7th decade of life were the largest represented group. The seasonal distributions of specimen collection sites followed the overall distribution of collection sites by year. Specimens obtained from the cornea were the most common (49.24%), also representing the largest number of specimens in all seasons. The most commonly isolated fungal microorganisms were Fusarium spp., followed by Aspergillus spp. and Candida albicans. Of the 6,556 specimens with positive bacterial cultures, 59% produced gram-positive bacteria, while the remainder produced gram-negative pathogens. The most commonly isolated bacteria were Pseudomonas aeruginosa (17.77%), Staphylococcus epidermidis (13.80%), Streptococcus pneumoniae (13.27%), S. viridans (12.23%), and S. aureus (11.18%). CONCLUSION Most submitted specimens were obtained from the cornea. The most commonly isolated fungal microorganisms were Fusarium spp., followed by Aspergillus spp. and C. albicans. The most commonly isolated bacteria were P. aeruginosa, followed by S. epidermidis and S. pneumoniae.
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Affiliation(s)
- Fahimeh Asadi-Amoli
- Microbiology Unit, Department of Pathology, Farabi Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Zohreh Abedinifar
- Microbiology Unit, Department of Pathology, Farabi Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Zohreh Nozarian
- Microbiology Unit, Department of Pathology, Farabi Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Fatemeh Heidary
- International Virtual Ophthalmic Research Center (IVORC), Austin, Texas, USA
| | - Mahsa Haji Safar Ali Memar
- Microbiology Unit, Department of Pathology, Farabi Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Athena Nezamabadi
- Microbiology Unit, Department of Pathology, Farabi Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Reza Gharebaghi
- International Virtual Ophthalmic Research Center (IVORC), Austin, Texas, USA
| | - Narges Roustaei
- Department of Biostatistics and Epidemiology, School of Health and Nutrition Sciences, Yasuj University of Medical Sciences, Yasuj, Iran
| | - Maryam Parvizi
- Department of Pathology, Mofid Children’s Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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