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Qu S, Tang Y, Ning Z, Zhou Y, Wu H. Desired properties of polymeric hydrogel vitreous substitute. Biomed Pharmacother 2024; 172:116154. [PMID: 38306844 DOI: 10.1016/j.biopha.2024.116154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 01/06/2024] [Accepted: 01/10/2024] [Indexed: 02/04/2024] Open
Abstract
Vitreous replacement is a commonly employed method for treating a range of ocular diseases, including posterior vitreous detachment, complex retinal detachment, diabetic retinopathy, macular hole, and ocular trauma. Various clinical substitutes for vitreous include air, expandable gas, silicone oil, heavy silicone oil, and balanced salt solution. However, these substitutes have drawbacks such as short retention time, cytotoxicity, high intraocular pressure, and the formation of cataracts, rendering them unsuitable for long-term treatment. Polymeric hydrogels possess the potential to serve as ideal vitreous substitutes due to their structure-mimicking to natural vitreous and adjustable mechanical properties. Replacement with hydrogels as the tamponade can help maintain the shape of the eyeball, apply pressure to the detached retina, and ensure the metabolic transport of substances without impairing vision. This literature review examines the required properties of artificial vitreous, including the optical properties, rheological properties, expansive force action, and physiological and biochemical functions of chemically and physically crosslinked hydrogels. The strategies for enhancing the biocompatibility and injectability of hydrogels are also summarized and discussed. From a clinical ophthalmology perspective, this paper presents the latest developments in vitreous replacement, providing clinicians with a comprehensive understanding of hydrogel clinical applications, which offers guidance for future design directions and methodologies for hydrogel development.
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Affiliation(s)
- Sheng Qu
- Department of Ophthalmology, The Second Hospital of Jilin University, Changchun 130041, China
| | - Yi Tang
- Department of Ophthalmology, The Second Hospital of Jilin University, Changchun 130041, China
| | - Zichao Ning
- Department of Ophthalmology, The Second Hospital of Jilin University, Changchun 130041, China
| | - Yanjie Zhou
- Department of Ophthalmology, The Second Hospital of Jilin University, Changchun 130041, China
| | - Hong Wu
- Department of Ophthalmology, The Second Hospital of Jilin University, Changchun 130041, China.
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Osinchuk SC, Grahn BH, Wilson TD, Thompson BN, Hart DA, Harrison KD, Cooper DML, Panahifar A, Rosenberg AM. Evaluation of Uveitis Induced in Rats by a Type I Collagen Peptide as a Model for Childhood Arthritis-associated Uveitis. Comp Med 2023; 73:267-276. [PMID: 37550056 PMCID: PMC10702287 DOI: 10.30802/aalas-cm-22-000129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/09/2023]
Abstract
Chronic asymptomatic and acute symptomatic anterior uveitis are forms of ocular inflammation associated with juvenile idiopathic arthritis (JIA) Chronic JIA-associated uveitis is characterized by young age of onset, female predilection, oligoarthritis, and antinuclear antibody (ANA) positivity. Acute JIA-associated uveitis predominantly affects older male juveniles who also develop enthesitis. A type I collagen-derived peptide (melanin-associated antigen [MAA]) induces anterior uveitis in rodents. In this study, we evaluated MAA-induced uveitis in rats as a potential model for JIA-uveitis. We characterized MAA-induced uveitis by assessing its relationship to age and sex; tracking the occurrence of arthritis, enthesitis, and ANA positivity; and measuring vitreous fluid inflammatory biomarkers. Juvenile and adult and male and female Lewis rats (Rattus norvegicus) were inoculated with MAA. Slit-lamp biomicroscopy, indirect ophthalmoscopy, and joint examinations were performed 3 times weekly. Rats were euthanized at 4 wk after MAA inoculation, and plasma ANA testing, vitreous inflammatory biomarker assays, and globe histopathology assessments were conducted. Uveitis, arthritis, ANA status, levels of inflammatory biomarkers, histopathology, and joint tomographic images were assessed in relation to age and sex and compared with nonuveitic controls. All MAA-immunized rats developed uveitis characterized by anterior chamber fibrin, iridal vessel dilation, and miosis, and uveal and choroidal lymphocytic infiltration. Levels of the vitreous fluid biomarker CCL5 were higher in uveitic rats compared with control rats. Time to uveitis onset, clinical uveitis scores, and biomarker levels did not differ based on age or sex. None of the MAA-exposed rats had arthritis, enthesitis, or ANA. None of the rats inoculated with MAA that had been treated with matrix metallopeptidase 1 had clinical, histologic, or immunohistochemical evidence of ocular inflammation. In contrast to JIA-associated uveitis in humans, MAA-induced uveitis in rats is not associated with age or sex predilections and MAA is not arthritogenic.
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Key Words
- ana, antinuclear antibody
- cfa, complete freund adjuvant
- ccl, chemokine (c-c motif) ligand
- cxcl, chemokine (c-x-c motif) ligand
- cx3cl1, chemokine (c-x3-c motif) ligand 1
- eaau, experimental autoimmune uveitis
- egf, epidermal growth factor
- jia, juvenile idiopathic arthritis
- maa, melanin-associated antigen
- mmp1, matrix metalloproteinase 1
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Affiliation(s)
- Stephanie C Osinchuk
- Department of Small Animal Clinical Sciences, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Bruce H Grahn
- Department of Small Animal Clinical Sciences, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Tracy D Wilson
- Department of Pediatrics, College of Medicine, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Brooke N Thompson
- Canadian Centre for Health and Safety in Agriculture, College of Medicine, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - David A Hart
- Department of Surgery, University of Calgary, Calgary, Alberta, Canada
| | - Kim D Harrison
- Department of Anatomy, Physiology, and Pharmacology, College of Medicine, University of Saskatchewan; Saskatoon, Saskatchewan, Canada
| | - David ML Cooper
- Department of Anatomy, Physiology, and Pharmacology, College of Medicine, University of Saskatchewan; Saskatoon, Saskatchewan, Canada
| | - Arash Panahifar
- Canadian Light Source, Saskatoon, Saskatchewan, Canada; and
- Department of Medical Imaging, College of Medicine, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Alan M Rosenberg
- Department of Pediatrics, College of Medicine, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
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Yin X, Qiu Y, Li Z, Guo L, Wei H, Liu B, Zhou M, Li T, Wang L, Jiang W, Bi H, Guo D. Longdan Xiegan Decoction alleviates experimental autoimmune uveitis in rats by inhibiting Notch signaling pathway activation and Th17 cell differentiation. Biomed Pharmacother 2021; 136:111291. [PMID: 33493870 DOI: 10.1016/j.biopha.2021.111291] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Revised: 01/07/2021] [Accepted: 01/13/2021] [Indexed: 12/14/2022] Open
Abstract
This study aimed to investigate the dynamic effects of the traditional Chinese medicine compound Longdan Xiegan Decoction (LXD) on the inhibition of Notch signaling pathway activation and T helper (Th) cell differentiation in rats with experimental autoimmune uveitis (EAU). Based on a network pharmacology strategy, we conducted protein interaction network analysis to construct an active ingredient-disease treatment network. Gene Ontology (GO) enrichment and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment analyses were further used to screen out the possible signaling pathways regulated by LXD in the treatment of uveitis. In the subsequent functional studies, we established an EAU rat model and investigated the regulatory role of LXD in the Notch signaling pathway and Th cell differentiation in rats with EAU. Female Lewis rats were randomly divided into a normal control (NC) group, an EAU group, and an LXD group. After the induction of EAU, the ocular inflammation and pathological changes in the rats in each group were observed; for documentation, a scanning laser ophthalmoscope (SLO) was used to observe fundus inflammation on day 12 after immunization. Additionally, quantitative polymerase chain reaction (Q-PCR) and enzyme-linked immunosorbent assay (ELISA) were used to detect the expression of Notch1, DLL4, IL-10 and IL-17A in the spleen, lymph nodes and ocular tissues of each group at 0, 6, 9, 12, 15 and 18 days after immunization. In addition, the dynamic frequencies of the CD4+, CD8+, Th17 and Treg cell subsets in the spleen, lymph nodes and ocular tissues were measured by flow cytometry. We found that the Notch signaling pathway was activated and the Th17 frequency was elevated in rats with EAU, leading to disrupted CD4+/CD8+ and Th17/Treg balance. The expression of Notch1, DLL4 and IL-17 mRNA and proteins in the EAU and LXD groups reached a peak on day 12, and then gradually decreased (all P < 0.05), and the ratios of the CD4+/CD8+ and Th17/Treg also peaked on day 12. However, after treatment with LXD, the expression of Notch1, DLL4 and IL-17 mRNA and proteins was significantly decreased (all P < 0.05), and the CD4+/CD8+ and Th17/Treg ratios significantly gradually returns to balance. LXD can efficiently inhibit Th17 cell differentiation, decrease inflammatory cytokine expression, and restore the CD4+/CD8+ and Th17/Treg balance by inhibiting the activation of the Notch signaling pathway in rats with EAU, thus effectively alleviating eye inflammation, protecting eye tissue structures, and positively regulating the immune state of the whole body and the intraocular microenvironment.
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Affiliation(s)
- Xuewei Yin
- Shandong University of Traditional Chinese Medicine, Jinan, 250002, China
| | - Yan Qiu
- The Second Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, 250002, China
| | - Zonghong Li
- Shandong University of Traditional Chinese Medicine, Jinan, 250002, China
| | - Lijie Guo
- School of Basic Medical Sciences, Capital Medical University, Beijing, 100069, China
| | - Huixia Wei
- Shandong University of Traditional Chinese Medicine, Jinan, 250002, China
| | - Bin Liu
- Department of Blood Transfusion, Linyi People's Hospital, No. 27#, Jiefang Road, Linyi, 276005, China
| | - Mengxian Zhou
- Shandong University of Traditional Chinese Medicine, Jinan, 250002, China
| | - Tuling Li
- Shandong University of Traditional Chinese Medicine, Jinan, 250002, China
| | - Lihan Wang
- Shandong Provincial Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Therapy of Ocular Diseases, Eye Institute of Shandong University of Traditional Chinese Medicine, Jinan, 250002, China
| | - Wenjun Jiang
- Shandong Provincial Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Therapy of Ocular Diseases, Eye Institute of Shandong University of Traditional Chinese Medicine, Jinan, 250002, China
| | - Hongsheng Bi
- Shandong Provincial Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Therapy of Ocular Diseases, Eye Institute of Shandong University of Traditional Chinese Medicine, Jinan, 250002, China
| | - Dadong Guo
- Shandong University of Traditional Chinese Medicine, Jinan, 250002, China; Shandong Provincial Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Therapy of Ocular Diseases, Eye Institute of Shandong University of Traditional Chinese Medicine, Jinan, 250002, China.
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Li J, Lu YR, Lin IF, Kang W, Chen HB, Lu HF, Wang HMD. Reversing UVB-induced photoaging with Hibiscus sabdariffa calyx aqueous extract. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2020; 100:672-681. [PMID: 31583701 DOI: 10.1002/jsfa.10063] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Revised: 09/14/2019] [Accepted: 09/22/2019] [Indexed: 06/10/2023]
Abstract
BACKGROUND Hibiscus sabdariffa is commonly used in daily life and its extract is applied widely in food and cosmetics. However, it has not been evaluated for its anti-aging effects. RESULTS Hibiscus sabdariffa calyx aqueous extract (HSCAE) has shown potential collagenase activity suppression effects, together with tyrosinase activity inhibition, and anti-oxidation as a free radical scavenger. The current investigation demonstrated that HSCAE was not cytotoxic in skin fibroblasts, and it significantly decreased ultraviolet B (UVB)-induced reactive oxygen species (ROS) on a flow cytometry assay. Moreover, HSCAE reduced matrix metalloproteinase (MMP) expression, increased tissue inhibition of metalloproteinase (TIMP)-1 level, and enhanced collagen content by inhibiting collagenase activity. It also blocked mRNA and protein expressions of melanin production pathway key factors, including the microphthalmia-associated transcription factor (MITF), tyrosinase, tyrosinase-related protein-1 (TRP-1), and dopachrome tautomerase-2 (TRP-2). CONCLUSION These results demonstrated, for the first time, the potential of HSCAE as a natural antioxidant with the ability to maintain collagen production and to decrease melanin syntheses under UVB radiation, for anti-aging effects. © 2019 Society of Chemical Industry.
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Affiliation(s)
- Jian Li
- College of Food and Biological Engineering, Jimei University, Xiamen, China
| | - Yi-Ru Lu
- Department of Bachelor Program of Biotechnology, National Chung Hsing University, Taichung City, Taiwan
| | - I-Fan Lin
- Graduate Institute of Biotechnology, National Chung Hsing University, Taichung, Taiwan
| | - Wenyi Kang
- Joint International Research Laboratory of Food & Medicine Resource Function, Henan Province, Henan University, Kaifeng, China
| | - Hong-Bin Chen
- College of Oceanology and Food Science, Quanzhou Normal University, Quanzhou, China
| | - Hsu-Feng Lu
- Department of Clinical Pathology, Cheng Hsin General Hospital, Taipei, Taiwan
| | - Hui-Min David Wang
- College of Food and Biological Engineering, Jimei University, Xiamen, China
- College of Oceanology and Food Science, Quanzhou Normal University, Quanzhou, China
- Graduate Institute of Biomedical Engineering, National Chung Hsing University, Taichung City, Taiwan
- College of Medicine, Kaohsiung Medical University, Kaohsiung City, Taiwan
- Department of Medical Laboratory Science and Biotechnology, China Medical University, Taichung City, Taiwan
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Garweg JG. [Pharmacological treatment strategies and surgical options for uveitis]. Ophthalmologe 2019; 116:942-950. [PMID: 30796601 DOI: 10.1007/s00347-019-0870-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
BACKGROUND Modern treatment of uveitis aims at a complete control of inflammatory activity, preservation of visual function and the prevention of secondary organ damage as a consequence of the underlying inflammatory disease and its treatment. OBJECTIVE This article gives an update about the strategies of pharmacological and surgical options for uveitis. MATERIAL AND METHODS The outcomes reported here are based on a PubMed search using the terms <"uveitis" AND "therapy"> and <"uveitis" AND "surgery" OR "surgical treatment">. All prospective studies and case series with more than 20 cases as well as review articles from the last 5 years along with cited cross-references were evaluated. RESULTS Local and systemic corticosteroids form the foundation of treatment after exclusion of an infectious etiology. If uveitis activity is not controlled within 6 weeks or if the daily corticosteroid dosage is unacceptably high, a treatment escalation using immunomodulatory drugs is required. If a complete control of inflammatory activity is not achieved, in a third phase treatment is supplemented by antibody-based treatment or cytokines, so-called biologics, with the aim of complete long-term freedom from disease without local or systemic steroid treatment. This target is achieved in 65-80% and guarantees long-term functional stability and anatomical integrity. Early treatment escalation in cases of persisting or recurrent activity as a rule prevents new secondary organ damage. Surgical options are utilized for diagnostic purposes, the administration of intravitreal drugs and for treatment of secondary complications. CONCLUSION Just like the majority of immunological diseases, uveitis is a chronic disease requiring long-term and possibly lifelong treatment and remission (absence of inflammation without treatment) is achieved in only <20%. Surgical interventions can be performed with a good prognosis, if the optic nerve head and macula are not involved. They have a substantially lower complication rate when freedom from symptoms exists preoperatively for at least 3 months.
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Affiliation(s)
- Justus G Garweg
- Berner Augenklinik am Lindenhofspital, Affiliation: Klinik und Poliklinik für Augenheilkunde, Inselspital, Universität Bern, Bremgartenstr 119, 3012, Bern, Schweiz. .,Swiss Eye Institute, Rotkreuz, Schweiz.
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Activation of the Notch signaling pathway disturbs the CD4 +/CD8 +, Th17/Treg balance in rats with experimental autoimmune uveitis. Inflamm Res 2019; 68:761-774. [PMID: 31209505 DOI: 10.1007/s00011-019-01260-w] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2018] [Revised: 06/10/2019] [Accepted: 06/11/2019] [Indexed: 12/14/2022] Open
Abstract
OBJECTIVE AND DESIGN The present study aimed to investigate the relationship between the disturbed balance of CD4+/CD8+, Th17/Treg and the activation of the Notch signaling pathway in experimental autoimmune uveitis (EAU). METHODS An EAU rat model was induced in Lewis rats, and pathology analysis was performed by hematoxylin and eosin (H&E) staining. CD4+, CD8+, Th17, and Treg levels in spleen, lymph nodes and eye tissues were determined by flow cytometry. Meanwhile, the expression of Notch1, DLL4, IL-10, and IL-17 was determined by quantitative polymerase chain reaction (Q-PCR) and enzyme-linked immunosorbent assay (ELISA). In addition, the inhibitory effect of N-(N-(3,5-difluorophenacetyl-L-alanyl))-S-phenylglycine t-butyl ester (DAPT) on Th17 differentiation by Notch signaling in vitro was further investigated using T lymphocytes from EAU rats on day 12 post-immunization by flow cytometry. RESULTS The pathological results showed that inflammatory cell infiltration occurred in ocular tissues in EAU rats. The CD4+/CD8+ and Th17/Treg ratios in EAU rats were apparently higher than those in normal control individuals. Q-PCR and ELISA analyses indicated the expression of Notch1, DLL4, IL-10, and IL-17 in EAU rats gradually increased on day 6 after immunization, peaked on day 12, and then gradually decreased. The dynamic trends in Notch1 and DLL4 expression in EAU rats were identical to those of CD4+/CD8+ and Th17/Treg levels. DAPT can significantly inhibit the activation of Notch signaling, decrease Th17 cell differentiation, and attenuate the level of the Th17 cell lineage, contributing to the balance of the Th17/Treg ratio. CONCLUSION The activation of the Notch signaling pathway can regulate Th17 and Treg cell differentiation, disrupt the CD4+/CD8+ and Th17/Treg balance, and aggravate the severity of EAU; inactivation of the Notch signaling pathway contributes to the CD4+/CD8+ and Th17/Treg balance in EAU rats. Our findings highlighted that the dynamic change in the CD4+/CD8+ and Th17/Treg ratio was consistent with the expression trend of Notch signaling in EAU rats, suggesting that Notch signaling may be a potentially important therapeutic target in clinical practice.
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Guo JG, Guo XM, Wang XR, Tian JZ, Bi HS. Metabolic profile analysis of free amino acids in experimental autoimmune uveoretinitis rat plasma. Int J Ophthalmol 2019; 12:16-24. [PMID: 30662835 DOI: 10.18240/ijo.2019.01.03] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Accepted: 11/21/2018] [Indexed: 12/13/2022] Open
Abstract
AIM To determine the differences of amino acid (AA) levels in experimental autoimmune uveoretinitis (EAU). METHODS AA analysis of the plasma samples in EAU rats induced by interphotoreceptor retinoid-binding protein emulsion were performed with high performance liquid chromatography (HPLC) and phenylisothiocyanate (PITC) pre-column derivation methods were performed. Using partial least squares discriminant analysis (PLS-DA), the potential biomarkers were identified in EAU rat plasma, and the metabolic pathways related to EAU were further analyzed. RESULTS The method results showed that linear (r≥0.9957), intra-day reproducible [relative standard deviation (RSD)=0.04%-1.33%], inter-day reproducible (RSD=0.06%-2.07%), repeatability (RSD=0.03%-0.89%), stability (RSD=0.05%-2.48%) and recovery (RSD=1.98%-4.39%), with detection limits of 0.853-11.4 ng/mL. The metabolic profile in EAU rats was different from that in the control groups five AAs concentrations were increased and nine AAs were reduced. Moreover, five metabolic pathways were related to the development of EAU. CONCLUSION The developed method is a simple, rapid and convenient for determination of AAs in EAU rat plasma, and these findings will provide a comprehensive insight on the metabolic profiling of the pathological changes in EAU.
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Affiliation(s)
- Jun-Guo Guo
- College of Pharmacy, Shandong University of Traditional Chinese Medicine, Jinan 250355, Shandong Province, China.,Shandong Provincial Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Therapy of Ocular Diseases, Jinan 250002, Shandong Province, China.,Eye Institute, Shandong University of Traditional Chinese Medicine, Jinan 250002, Shandong Province, China
| | - Xin-Miao Guo
- School of Management, Shandong University of Traditional Chinese Medicine, Jinan 250355, Shandong Province, China
| | - Xing-Rong Wang
- Shandong Provincial Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Therapy of Ocular Diseases, Jinan 250002, Shandong Province, China.,Eye Institute, Shandong University of Traditional Chinese Medicine, Jinan 250002, Shandong Province, China.,Affiliated Eye Hospital, Shandong University of Traditional Chinese Medicine, Jinan 250002, Shandong Province, China
| | - Jing-Zhen Tian
- College of Pharmacy, Shandong University of Traditional Chinese Medicine, Jinan 250355, Shandong Province, China
| | - Hong-Sheng Bi
- Shandong Provincial Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Therapy of Ocular Diseases, Jinan 250002, Shandong Province, China.,Eye Institute, Shandong University of Traditional Chinese Medicine, Jinan 250002, Shandong Province, China.,Affiliated Eye Hospital, Shandong University of Traditional Chinese Medicine, Jinan 250002, Shandong Province, China
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Beamer G, Reilly CM, Pizzirani S. Microscopic Lesions in Canine Eyes with Primary Glaucoma. Vet Clin North Am Small Anim Pract 2016; 45:1213-33, vi. [PMID: 26456753 DOI: 10.1016/j.cvsm.2015.07.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Although the clinical classification of primary glaucoma in dogs is quite simple, the phenotypes of glaucoma in most of the species are indeed multiple. Ophthalmologists can often evaluate the dynamic changes of clinical signs at different times in the course of the disease, whereas pathologists are often presented with globes that have undergone abundant therapies and are at the end stage. Therefore, an open collaboration between clinicians and pathologists can produce the most accurate interpretation in the pathology report and improve patient outcomes. This article focuses on the histomorphologic elements that characterize, and are important to, canine primary glaucomas.
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Affiliation(s)
- Gillian Beamer
- Department of Infectious Disease and Global Health, Tufts University, 200 Westboro Road, North Grafton, MA 01536, USA.
| | - Christopher M Reilly
- Microbiology & Immunology, School of Veterinary Medicine, University of California, 1 Shields Avenue, Davis, CA 95616, USA
| | - Stefano Pizzirani
- Ophthalmology, Department of Clinical Sciences, Cummings School of Veterinary Medicine, Tufts University, 200 Westboro Road, North Grafton, MA 01536, USA
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Zhang L, Wan F, Song J, Tang K, Zheng F, Guo J, Guo D, Bi H. Imbalance Between Th17 Cells and Regulatory T Cells During Monophasic Experimental Autoimmune Uveitis. Inflammation 2015; 39:113-122. [DOI: 10.1007/s10753-015-0229-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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10
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Preparation and evaluation of sinomenine hydrochloride in situ gel for uveitis treatment. Int Immunopharmacol 2013; 17:99-107. [DOI: 10.1016/j.intimp.2013.05.020] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2013] [Revised: 05/01/2013] [Accepted: 05/20/2013] [Indexed: 01/13/2023]
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Abstract
Uveitis is underappreciated as a sight-threatening cause of blindness. There are two broad causative classes of uveitis: infectious and non-infectious. Non-infectious uveitis is considered a prototypical autoimmune disorder based mainly on data from experimental models in the mouse. Several different experimental models exist that reflect the different types of uveitis in man (anterior, intermediate, and posterior uveitis). These models have demonstrated that uveitis is predominantly a Th1/Th17 mediated disease, although innate immune cells play a significant role both in induction of disease and in tissue damage. Most experimental models of uveitis rely on activation of the innate immune system by use of adjuvants that activate a range of pathogen recognition receptors (PRRs). This begs the question of the underlying role of initial and/or persistent infection, including latent infection, in immune-mediated uveitis in which active infection cannot be demonstrated. This further raises the possibility of pathogenic mechanisms such as antigenic cross-reactivity and molecular mimicry. Alternatively, residual/latent antigen from infectious agents may act as "endogenous" adjuvants for induction of immune reactions to damaged/altered self antigen, suggesting a commonality in pathogenesis for both infectious and non-infectious uveitis in man.
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Affiliation(s)
- John V Forrester
- Ocular Immunology Laboratory, Section of Immunology and Infection, Division of Applied Medicine, Institute of Medical Sciences, University of Aberdeen, Scotland.
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Olaru F, Wang XP, Luo W, Ge L, Miner JH, Kleinau S, Geiger XJ, Wasiluk A, Heidet L, Kitching AR, Borza DB. Proteolysis breaks tolerance toward intact α345(IV) collagen, eliciting novel anti-glomerular basement membrane autoantibodies specific for α345NC1 hexamers. THE JOURNAL OF IMMUNOLOGY 2013; 190:1424-32. [PMID: 23303673 DOI: 10.4049/jimmunol.1202204] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Goodpasture disease is an autoimmune kidney disease mediated by autoantibodies against noncollagenous domain 1 (NC1) monomers of α3(IV) collagen that bind to the glomerular basement membrane (GBM), usually causing rapidly progressive glomerulonephritis (GN). We identified a novel type of human IgG4-restricted anti-GBM autoantibodies associated with mild nonprogressive GN, which specifically targeted α345NC1 hexamers but not α3NC1 monomers. The mechanisms eliciting these anti-GBM autoantibodies were investigated in mouse models recapitulating this phenotype. Wild-type and FcγRIIB(-/-) mice immunized with autologous murine GBM NC1 hexamers produced mouse IgG1-restricted autoantibodies specific for α345NC1 hexamers, which bound to the GBM in vivo but did not cause GN. In these mice, intact collagen IV from murine GBM was not immunogenic. However, in Col4a3(-/-) Alport mice, both intact collagen IV and NC1 hexamers from murine GBM elicited IgG Abs specific for α345NC1 hexamers, which were not subclass restricted. As heterologous Ag in COL4A3-humanized mice, murine GBM NC1 hexamers elicited mouse IgG1, IgG2a, and IgG2b autoantibodies specific for α345NC1 hexamers and induced anti-GBM Ab GN. These findings indicate that tolerance toward autologous intact α345(IV) collagen is established in hosts expressing this Ag, even though autoreactive B cells specific for α345NC1 hexamers are not purged from their repertoire. Proteolysis selectively breaches this tolerance by generating autoimmunogenic α345NC1 hexamers. This provides a mechanism eliciting autoantibodies specific for α345NC1 hexamers, which are restricted to noninflammatory IgG subclasses and are nonnephritogenic. In Alport syndrome, lack of tolerance toward α345(IV) collagen promotes production of alloantibodies to α345NC1 hexamers, including proinflammatory IgG subclasses that mediate posttransplant anti-GBM nephritis.
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Affiliation(s)
- Florina Olaru
- Division of Nephrology, Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN 37232, USA
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Alario AF, Pizzirani S, Pirie CG. Histopathologic evaluation of the anterior segment of eyes enucleated due to glaucoma secondary to primary lens displacement in 13 canine globes. Vet Ophthalmol 2012; 16 Suppl 1:34-41. [DOI: 10.1111/j.1463-5224.2012.01019.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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14
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Manickam B, Jha P, Matta B, Liu J, Bora PS, Bora NS. Inhibition of complement alternative pathway suppresses experimental autoimmune anterior uveitis by modulating T cell responses. J Biol Chem 2011; 286:8472-8480. [PMID: 21216963 DOI: 10.1074/jbc.m110.197616] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The objective of the current study was to delineate the pathway of complement activation that is crucial for the induction of experimental autoimmune anterior uveitis (EAAU). We studied the development of EAAU in melanin-associated antigen (MAA)-sensitized Lewis rats treated with antibody against C4 or factor B. Control animals received isotype IgG control. Antibody against C4 had no effect on EAAU, and all of the animals developed EAAU similar to those injected with control IgG. In contrast, EAAU was completely inhibited in all MAA-sensitized Lewis rats injected with factor B antibody. Treatment with anti-factor B antibody resulted in suppression of ocular complement activation. Adoptive transfer of T lymphocytes harvested from draining lymph nodes of donor animals treated with anti-factor B did not transfer EAAU to naïve syngenic rats. Anti-factor B antibody inhibited the ability of MAA-specific CD4(+) T cells to proliferate (in vitro) in response to MAA in a dose-dependent manner. Level of TNF-α and IFN-γ decreased in the presence of anti-factor B. Collectively, our results provide the novel finding that complement activation via the alternative pathway contributes to intraocular inflammation in EAAU, and anti-factor B-mediated inhibition of EAAU is due to diminished antigen-specific CD4(+) T cell responses to MAA. Our findings explain the interactions between the complement system and T cells that are critical for the induction of EAAU and may lead to the development of therapy for idiopathic anterior uveitis based on selective blockade of the alternative pathway.
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Affiliation(s)
- Balasubramanian Manickam
- From the Department of Ophthalmology, Jones Eye Institute, Pat and Willard Walker Eye Research Center, University of Arkansas for Medical Sciences, Little Rock, Arkansas 72205
| | - Purushottam Jha
- From the Department of Ophthalmology, Jones Eye Institute, Pat and Willard Walker Eye Research Center, University of Arkansas for Medical Sciences, Little Rock, Arkansas 72205
| | - Bharati Matta
- From the Department of Ophthalmology, Jones Eye Institute, Pat and Willard Walker Eye Research Center, University of Arkansas for Medical Sciences, Little Rock, Arkansas 72205
| | - Juan Liu
- From the Department of Ophthalmology, Jones Eye Institute, Pat and Willard Walker Eye Research Center, University of Arkansas for Medical Sciences, Little Rock, Arkansas 72205
| | - Puran S Bora
- From the Department of Ophthalmology, Jones Eye Institute, Pat and Willard Walker Eye Research Center, University of Arkansas for Medical Sciences, Little Rock, Arkansas 72205
| | - Nalini S Bora
- From the Department of Ophthalmology, Jones Eye Institute, Pat and Willard Walker Eye Research Center, University of Arkansas for Medical Sciences, Little Rock, Arkansas 72205.
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Manickam B, Jha P, Hepburn NJ, Morgan BP, Harris CL, Bora PS, Bora NS. Suppression of complement activation by recombinant Crry inhibits experimental autoimmune anterior uveitis (EAAU). Mol Immunol 2010; 48:231-9. [PMID: 20843553 DOI: 10.1016/j.molimm.2010.08.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2010] [Revised: 07/28/2010] [Accepted: 08/10/2010] [Indexed: 12/12/2022]
Abstract
This study was initiated to explore the effect of recombinant rat Crry linked to the Fc portion of rat IgG2a (Crry-Ig) on the induction of experimental autoimmune anterior uveitis (EAAU) and on established disease. EAAU was induced in Lewis rats by immunization with bovine melanin-associated antigen (MAA). MAA sensitized animals received Crry-Ig, rat IgG2a (isotype control) or PBS separately before the onset of EAAU or after the onset of clinical disease. Administration of Crry-Ig suppressed the induction of EAAU while all animals injected with IgG2a or PBS developed the normal course of EAAU. Treatment with Crry-Ig resulted in the suppression of ocular complement activation as well as the functional activity of complement in the peripheral blood. At the peak of EAAU, levels of IFN-γ, IP-10, ICAM-1 and LECAM-1 were significantly reduced within the eyes of Crry-Ig treated Lewis rats. Importantly, administration of Crry-Ig even after the onset of EAAU resulted in a sharp decline in the disease activity and early resolution of EAAU. Collectively, the evidence presented here demonstrate that inhibition of complement by Crry-Ig results in low levels of inflammatory molecules-C3 activation products, MAC, cytokines, chemokines and adhesion molecules in the eye. Down-regulation of these molecules affects the infiltration and recruitment of inflammatory cells to the eye resulting in the inhibition of EAAU.
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MESH Headings
- Animals
- Antigens, Surface/immunology
- Antigens, Surface/metabolism
- Autoimmune Diseases/immunology
- Autoimmune Diseases/metabolism
- Autoimmune Diseases/pathology
- Blotting, Western
- Complement Activation/immunology
- Disease Models, Animal
- Enzyme-Linked Immunosorbent Assay
- Fluorescent Antibody Technique
- Immunohistochemistry
- Male
- Rats
- Rats, Inbred Lew
- Receptors, Cell Surface/immunology
- Receptors, Cell Surface/metabolism
- Recombinant Proteins/immunology
- Recombinant Proteins/metabolism
- Reverse Transcriptase Polymerase Chain Reaction
- Uveitis, Anterior/immunology
- Uveitis, Anterior/metabolism
- Uveitis, Anterior/pathology
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Affiliation(s)
- Balasubramanian Manickam
- Department of Ophthalmology, Jones Eye Institute, Pat and Willard Walker Eye Research Center, University of Arkansas for Medical Sciences, 4301 West Markham, Little Rock, AR 72205, USA
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