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Lee CE, Kim JY, Yoon JS, Ko J. Role of Inositol-Requiring Enzyme 1 and Autophagy in the Pro-Fibrotic Mechanism Underlying Graves' Orbitopathy. Yonsei Med J 2024; 65:397-405. [PMID: 38910302 PMCID: PMC11199180 DOI: 10.3349/ymj.2023.0294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Revised: 01/02/2024] [Accepted: 01/25/2024] [Indexed: 06/25/2024] Open
Abstract
PURPOSE Orbital fibroblasts play key roles in the pathogenesis of Graves' orbitopathy (GO), and previous findings have shown that endoplasmic reticulum (ER) stress and autophagy also contribute to GO. In this study, we investigated the presently unclear roles of inositol-requiring enzyme 1 (IRE1) and related autophagy processes in the pro-fibrotic mechanism of GO. MATERIALS AND METHODS Orbital adipose/connective tissues were obtained from eight GO patients and six normal individuals during surgery. GO fibroblasts were transfected with IRE1 small-interfering RNA and treated with bafilomycin A1 (Baf-A1) to evaluate the inhibitory effects of ER stress and autophagy, and protein-expression levels were analyzed through western blotting after stimulation with transforming growth factor (TGF)-β. RESULTS TGF-β stimulation upregulated IRE1 in GO orbital fibroblasts, whereas silencing IRE1 suppressed fibrosis and autophagy responses. Similarly, Baf-A1, an inhibitor of late-phase autophagy, decreased the expression of pro-fibrotic proteins. CONCLUSION IRE1 mediates autophagy and the pro-fibrotic mechanism of GO, which provides a more comprehensive interpretation of GO pathogenesis and suggests potential therapeutic targets.
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Affiliation(s)
- Chae Eun Lee
- Department of Ophthalmology, Institute of Vision Research, Yonsei University College of Medicine, Seoul, Korea
- Siloam Eye Hospital, Seoul, Korea
| | - Ji-Young Kim
- Department of Ophthalmology, Institute of Vision Research, Yonsei University College of Medicine, Seoul, Korea
| | - Jin Sook Yoon
- Department of Ophthalmology, Institute of Vision Research, Yonsei University College of Medicine, Seoul, Korea
| | - JaeSang Ko
- Department of Ophthalmology, Institute of Vision Research, Yonsei University College of Medicine, Seoul, Korea.
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Lanzolla G, Comi S, Cosentino G, Pakdel F, Marinò M. Statins in Graves Orbitopathy: A New Therapeutic Tool. Ophthalmic Plast Reconstr Surg 2023; 39:S29-S39. [PMID: 38054983 DOI: 10.1097/iop.0000000000002525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2023]
Abstract
PURPOSE Graves orbitopathy (GO) is the most common extrathyroidal manifestation of Graves disease. Although its pathogenesis is not fully elucidated, GO is commonly considered an autoimmune disease due to loss of self-tolerance against autoantigens shared by thyroid epithelial cells and orbital fibroblasts. High-dose intravenous glucocorticoids (ivGCs) are the most used treatment for moderate-to-severe, active GO, but the addition of other immunomodulating treatments can improve the efficacy of ivGCs. Among the various risk factors that can affect the occurrence of GO, cholesterol may be worthy of interest. Since 2015 the role of cholesterol and cholesterol-lowering medications has been investigated. The purpose of this review is to discuss this topic, thereby offering new therapeutic opportunities for patients with GO. METHODS We searched PubMed for studies published between January 1, 1980 and June 1, 2023, using the search terms "Graves orbitopathy," "thyroid eye disease," "Graves ophthalmopathy," "thyroid ophthalmopathy," "thyroid-associated ophthalmopathy," "endocrine ophthalmopathy," "cholesterol," "lipids," "statins," "low-density lipoprotein," "atorvastatin," and "cholesterol-lowering drugs." Only English-language articles were included. RESULTS A correlation between low-density lipoprotein cholesterol and the risk of GO development has been reported. Furthermore, low-density lipoprotein cholesterol has been proposed as a risk factor that can affect the course of GO and the response to ivGCs. The protective role of cholesterol-lowering medications in preventing GO has been also investigated. Statin treatment was found to have potential benefits in reducing the risk of GO in patients with Graves disease. Given these findings, measurement of low-density lipoprotein cholesterol and treatment of hypercholesterolemia in patients with moderate-to-severe, active GO may be considered before starting ivGCs administration. Recently, a randomized clinical trial aimed at investigating the effects of statins in GO suggested that the addition of oral atorvastatin to ivGCs improves the overall outcome of moderate-to-severe, active GO in hypercholesterolemic patients given ivGCs. CONCLUSIONS Overall, statins seem to have a preventive and therapeutic role in moderate-to-severe active GO. Their efficacy can be related to cholesterol-lowering activity, pleiotropic actions, and interaction with methylprednisolone.
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Affiliation(s)
- Giulia Lanzolla
- Department of Clinical and Experimental Medicine, Endocrinology Unit II, University of Pisa and University Hospital of Pisa, Pisa, Italy
- Department of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, Pennsylvania, U.S.A
| | - Simone Comi
- Department of Clinical and Experimental Medicine, Endocrinology Unit II, University of Pisa and University Hospital of Pisa, Pisa, Italy
| | - Giada Cosentino
- Department of Clinical and Experimental Medicine, Endocrinology Unit II, University of Pisa and University Hospital of Pisa, Pisa, Italy
| | - Farzad Pakdel
- Department of Ophthalmic Plastic and Reconstructive Surgery, Farabi Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Michele Marinò
- Department of Clinical and Experimental Medicine, Endocrinology Unit II, University of Pisa and University Hospital of Pisa, Pisa, Italy
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Hai YP, Lee ACH, Chen K, Kahaly GJ. Traditional Chinese medicine in thyroid-associated orbitopathy. J Endocrinol Invest 2023; 46:1103-1113. [PMID: 36781592 DOI: 10.1007/s40618-023-02024-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/02/2023] [Accepted: 01/24/2023] [Indexed: 02/15/2023]
Abstract
PURPOSE Orbital fibroblasts (OF) are considered the central target cells in the pathogenesis of thyroid-associated orbitopathy (TAO), which comprises orbital inflammation, orbital tissue edema, adipogenesis, fibrosis, oxidative stress and autophagy. Certain active ingredients of traditional Chinese medicine (TCM) demonstrated inhibition of TAO-OF in pre-clinical studies and they could be translated into novel therapeutic strategies. METHODS The pertinent and current literature of pre-clinical studies on TAO investigating the effects of active ingredients of TCM was reviewed using the NCBI PubMed database. RESULTS Eleven TCM compounds demonstrated inhibition of TAO-OF in-vitro and three of them (polydatin, curcumin, and gypenosides) resulted in improvement in TAO mouse models. Tanshinone IIA reduced inflammation, oxidative stress and adipogenesis. Both resveratrol and its precursor polydatin displayed anti-oxidative and anti-adipogenic properties. Celastrol inhibited inflammation and triptolide prevented TAO-OF activation, while icariin inhibited autophagy and adipogenesis. Astragaloside IV reduced inflammation via suppressing autophagy and inhibited fat accumulation as well as collagen deposition. Curcumin displayed multiple actions, including anti-inflammatory, anti-oxidative, anti-adipogenic, anti-fibrotic and anti-angiogenic effects via multiple signaling pathways. Gypenosides reduced inflammation, oxidative stress, tissue fibrosis, as well as oxidative stress mediated autophagy and apoptosis. Dihydroartemisinin inhibited OF proliferation, inflammation, hyaluronan (HA) production, and fibrosis. Berberine attenuated inflammation, HA production, adipogenesis, and fibrosis. CONCLUSIONS Clinical trials of different phases with adequate power and sound methodology will be warranted to evaluate the appropriate dosage, safety and efficacy of these compounds in the management of TAO.
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Affiliation(s)
- Y P Hai
- Molecular Thyroid Research Laboratory, Department of Medicine I, Johannes Gutenberg University (JGU) Medical Center, Langenbeckstreet 1, 55131, Mainz, Germany
- Department of Endocrinology, Hainan General Hospital, Hainan Affiliated Hospital of Hainan Medical University, Haikou, China
| | - A C H Lee
- Division of Endocrinology and Metabolism, Department of Medicine, LKS Faculty of Medicine, The University of Hong Kong, Queen Mary Hospital, Hong Kong SAR, China
| | - K Chen
- Department of Endocrinology, Hainan General Hospital, Hainan Affiliated Hospital of Hainan Medical University, Haikou, China
| | - G J Kahaly
- Molecular Thyroid Research Laboratory, Department of Medicine I, Johannes Gutenberg University (JGU) Medical Center, Langenbeckstreet 1, 55131, Mainz, Germany.
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Chen YQ, Gao LD, Liu YL, Shen Y, Diao JL, Yang WH, Wei RL. Autophagy in graves' ophthalmopathy. Front Cell Dev Biol 2023; 11:1158279. [PMID: 37123414 PMCID: PMC10140433 DOI: 10.3389/fcell.2023.1158279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Accepted: 04/03/2023] [Indexed: 05/02/2023] Open
Abstract
Graves' ophthalmopathy (GO) is an inflammatory autoimmune disease that affects the eyes. It can significantly alter the quality of life in patients because of its distinctive pathological appearance and the effect on vision. To date, the exact pathological mechanism of GO has not been explicitly discovered. However, several studies have associated autophagy with this disease. Autophagy is a catabolic process that helps maintain homeostasis in all organisms by protecting the cells and tissues from various endogenous and exogenous stress factors. Based on our results, patients affected with GO have comparatively elevated levels of autophagy, which critically affects the pathological mechanism of the GO. In this review, we have summarized the autophagy mechanism in the pathogenesis of GO.
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Affiliation(s)
- Yu-Qing Chen
- Department of Ophthalmology, Changzheng Hospital of Naval Medicine University, Shanghai, China
| | - Lian-Di Gao
- Department of Nursing, Changzheng Hospital of Naval Medicine University, Shanghai, China
| | - Yi-Lin Liu
- Department of Nursing, Changzheng Hospital of Naval Medicine University, Shanghai, China
| | - Ya Shen
- Department of Ophthalmology, Changzheng Hospital of Naval Medicine University, Shanghai, China
| | - Jia-Le Diao
- Department of Ophthalmology, Changzheng Hospital of Naval Medicine University, Shanghai, China
| | - Wei-Hua Yang
- Shenzhen Eye Hospital, Jinan University, Shenzhen, China
- *Correspondence: Rui-Li Wei, ; Wei-Hua Yang,
| | - Rui-Li Wei
- Department of Ophthalmology, Changzheng Hospital of Naval Medicine University, Shanghai, China
- *Correspondence: Rui-Li Wei, ; Wei-Hua Yang,
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Khan F, Khan H, Khan A, Yamasaki M, Moustaid-Moussa N, Al-Harrasi A, Rahman SM. Autophagy in adipogenesis: Molecular mechanisms and regulation by bioactive compounds. Biomed Pharmacother 2022; 155:113715. [PMID: 36152415 DOI: 10.1016/j.biopha.2022.113715] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Revised: 09/19/2022] [Accepted: 09/19/2022] [Indexed: 11/02/2022] Open
Abstract
White adipose tissue expands rapidly due to increased adipocyte number (hyperplasia) and size (hypertrophy), which results in obesity. Adipogenesis is a process of the formation of mature adipocytes from precursor cells. Additionally, obesity-related metabolic complications, such as fatty liver and insulin resistance, are linked to adipogenesis. On the contrary, autophagy is a catabolic process; essential to maintain cellular homeostasis via the degradation or recycling of unnecessary or damaged components. Importantly, autophagy dictates obesity and adipogenesis. Hence, a clear understanding of how autophagy regulates adipogenesis is crucial for drug development and the prevention and treatment of obesity and its associated disorders, such as type 2 diabetes, cardiovascular disease, and cancer. In this review, we highlighted recent findings regarding the crosstalk between adipogenesis and autophagy, as well as the molecules involved. Furthermore, the review discussed how bioactive compounds regulate adipogenesis by manipulating autophagy and underlying molecular mechanisms. Based on in vitro and animal studies, we summarized the effects of bioactive compounds on adipogenesis and autophagy. Hence, human studies are necessary to validate the effectiveness and optimal dosage of these bioactive compounds.
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Affiliation(s)
- Faizullah Khan
- Natural and Medical Sciences Research Center, University of Nizwa, Nizwa 616, Sultanate of Oman; Department of Pharmacy, Abdul Wali Khan University Mardan, Mardan 23200 Khyber Pakhtunkhwa, Pakistan
| | - Haroon Khan
- Department of Pharmacy, Abdul Wali Khan University Mardan, Mardan 23200 Khyber Pakhtunkhwa, Pakistan
| | - Ajmal Khan
- Natural and Medical Sciences Research Center, University of Nizwa, Nizwa 616, Sultanate of Oman
| | - Masao Yamasaki
- Department of Biochemistry and Applied Biosciences, Faculty of Agriculture, University of Miyazaki, Miyazaki, Japan
| | - Naima Moustaid-Moussa
- Texas Tech University, Nutritional Sciences, Lubbock, TX 79409, USA; Obesity Research Institute, Texas Tech University, Lubbock, TX 79409, USA
| | - Ahmed Al-Harrasi
- Natural and Medical Sciences Research Center, University of Nizwa, Nizwa 616, Sultanate of Oman
| | - Shaikh Mizanoor Rahman
- Natural and Medical Sciences Research Center, University of Nizwa, Nizwa 616, Sultanate of Oman.
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Yoon J, Kikkawa D. Thyroid eye disease: From pathogenesis to targeted therapies. Taiwan J Ophthalmol 2022; 12:3-11. [PMID: 35399971 PMCID: PMC8988977 DOI: 10.4103/tjo.tjo_51_21] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Accepted: 10/30/2021] [Indexed: 11/18/2022] Open
Abstract
Thyroid eye disease (TED) is the most common extrathyroidal manifestation of autoimmune Graves’ hyperthyroidism. TED is a debilitating and potentially blinding disease with unclear pathogenesis. Autoreactive inflammatory reactions targeting orbital fibroblasts (OFs) lead to the expansion of orbital adipose tissues and extraocular muscle swelling within the fixed bony orbit. There are many recent advances in the understating of molecular pathogenesis of TED. The production of autoantibodies to cross-linked thyroid-stimulating hormone receptor and insulin-like growth factor-1 receptor (IGF-1R) activates OFs to produce significant cytokines and chemokines and hyaluronan production and to induce adipocyte differentiation. In moderately severe active TED patients, multicenter clinical trials showed that inhibition of IGF-1R with teprotumumab was unprecedentedly effective with minimal side effects. The emergence of novel biologics resulted in a paradigm shift in the treatment of TED. We here review the literature on advances of pathogenesis of TED and promising therapeutic targets and drugs.
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Jia X, Zhai T, Zhang JA. Circulating Exosome Involves in the Pathogenesis of Autoimmune Thyroid Diseases Through Immunomodulatory Proteins. Front Immunol 2021; 12:730089. [PMID: 34867951 PMCID: PMC8636008 DOI: 10.3389/fimmu.2021.730089] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Accepted: 10/25/2021] [Indexed: 01/07/2023] Open
Abstract
Autoimmune thyroid diseases (AITDs) are chronic organ-specific autoimmune diseases, mainly including Graves' disease (GD) and Hashimoto's thyroiditis (HT). Exosomes, as extracellular vesicles, contain a variety of biologically active substances that play a role in information exchange, thereby affecting the occurrence and progression of diseases. However, it is unclear whether exosomes are involved in the pathogenesis of AITDs. In this study, the role of exosomes in AITDs was explored from a proteomics perspective. Plasma exosomes were isolated from 12 patients with GD, 10 patients with HT, and seven normal controls (NC). Protein profiles were detected using the data-independent acquisition (DIA) method and analyzed to investigate changes in plasma exosome proteins. In the setting of GD, 11 proteins were upregulated while 197 proteins were downregulated compared with healthy people. Among them, MAP1S (log2 FC = 4.669, p = 0.009) and VAMP8 (log2 FC = 3.216, p = 0.003) were the most significantly upregulated, and RSU1 (log2 FC = -6.797, p = 0.001), ACTB (log2 FC = -4.795, p < 0.001), and CXCL7 (log2 FC = -4.674, p < 0.001) were the most significantly downregulated. In the cases of HT, HGFL (log2 FC = 2.766, p = 0.001), FAK1 (log2 FC = 2.213, p < 0.001), and PTN12 (log2 FC = 1.624, p < 0.001) were significantly upregulated, while PSMF1 (log2 FC = -3.591, p < 0.001), PXL2B (log2 FC = -2.622, p = 0.001), and CYTM (log2 FC = -1.609, p < 0.001) were the most downregulated. These differential proteins were mainly enriched in the immune system and metabolic system, indicating that plasma exosomes may play an important role in systemic immune imbalance in AITDs.
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Affiliation(s)
- Xi Jia
- Department of Endocrinology, Shanghai University of Medicine & Health Sciences Affiliated Zhoupu Hospital, Shanghai, China
| | - Tianyu Zhai
- Department of Endocrinology, Shanghai University of Medicine & Health Sciences Affiliated Zhoupu Hospital, Shanghai, China
- Department of Endocrinology, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Jin-an Zhang
- Department of Endocrinology, Shanghai University of Medicine & Health Sciences Affiliated Zhoupu Hospital, Shanghai, China
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Li CW, Sachidanandam R, Jayaprakash A, Yi Z, Zhang W, Stefan-Lifshitz M, Concepcion E, Tomer Y. Identification of New Rare Variants Associated With Familial Autoimmune Thyroid Diseases by Deep Sequencing of Linked Loci. J Clin Endocrinol Metab 2021; 106:e4680-e4687. [PMID: 34143178 PMCID: PMC8530708 DOI: 10.1210/clinem/dgab440] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Indexed: 11/19/2022]
Abstract
CONTEXT Genetic risk factors play a major role in the pathoetiology of autoimmune thyroid diseases (AITD). So far, only common risk variants have been identified in AITD susceptibility genes. Recently, rare genetic variants have emerged as important contributors to complex diseases, and we hypothesized that rare variants play a key role in the genetic susceptibility to AITD. OBJECTIVE We aimed to identify new rare variants that are associated with familial AITD. METHODS We performed deep sequencing of 3 previously mapped AITD-linked loci (10q, 12q, and 14q) in a dataset of 34 families in which AITD clustered (familial AITD). RESULTS We identified 13 rare variants, located in the inositol polyphosphate multikinase (IPMK) gene, that were associated with AITD (ie, both Graves' disease [GD] and Hashimoto's thyroiditis [HT]); 2 rare variants, within the dihydrolipoamide S-succinyltransferase (DLST) and zinc-finger FYVE domain-containing protein (ZFYVE1) genes, that were associated with GD only; and 3 rare variants, within the phosphoglycerate mutase 1 pseudogene 5 (PGAM1P5), LOC105369879, and methionine aminopeptidase 2 (METAP2) genes, that were associated with HT only. CONCLUSION Our study demonstrates that, in addition to common variants, rare variants also contribute to the genetic susceptibility to AITD. We identified new rare variants in 6 AITD susceptibility genes that predispose to familial AITD. Of these, 3 genes, IPMK, ZFYVE1, and METAP2, are mechanistically involved in immune pathways and have been previously shown to be associated with autoimmunity. These genes predispose to thyroid autoimmunity and may serve as potential therapeutic targets in the future.
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Affiliation(s)
- Cheuk Wun Li
- Department of Medicine, Albert Einstein College of Medicine, Bronx, NY 10461, USA
| | - Ravi Sachidanandam
- Department of Oncological Sciences, Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Anitha Jayaprakash
- Department of Oncological Sciences, Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Zhengzi Yi
- Department of Medicine Bioinformatics Core, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Weijia Zhang
- Department of Medicine Bioinformatics Core, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | | | - Erlinda Concepcion
- Department of Medicine, Albert Einstein College of Medicine, Bronx, NY 10461, USA
| | - Yaron Tomer
- Department of Medicine, Albert Einstein College of Medicine, Bronx, NY 10461, USA
- Correspondence: Yaron Tomer, MD, Department of Medicine, Albert Einstein College of Medicine, 1300 Morris Park Ave, Bronx, NY 10461, USA.
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Simvastatin Inhibits CYR61 Expression in Orbital Fibroblasts in Graves' Ophthalmopathy through the Regulation of FoxO3a Signaling. Mediators Inflamm 2021; 2021:8888913. [PMID: 33542676 PMCID: PMC7843182 DOI: 10.1155/2021/8888913] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Revised: 12/22/2020] [Accepted: 01/08/2021] [Indexed: 02/01/2023] Open
Abstract
Graves' ophthalmopathy (GO), which is characterized by orbital tissue inflammation, expansion, and fibrosis, is the ocular manifestation in 25% to 50% of patients with Graves' disease. As the pathology of GO is driven by autoimmune inflammation, many proinflammatory cytokines/chemokines, including TNF-α, IL-1β, IL-6, and CCL20, are crucial in the pathogenesis of GO to activate the orbital fibroblasts. Cysteine-rich protein 61 (CYR61), which is known to regulate cell proliferation, adhesion, and migration, plays a proinflammatory role in the pathogenesis of many inflammatory diseases, such as rheumatoid arthritis. CYR61 was considered a potential biomarker of GO in recent studies. Statins, which are cholesterol-lowering drugs, were found to reduce the risk of GO, probably through their anti-inflammatory and immunomodulatory effects. In this study, we established a link between CYR61 and statins in the pathogenesis and potential treatment for GO. Firstly, our data showed the overexpression of CYR61 in the orbital tissue (n = 4) and serum specimens (n = 6) obtained from the patients with inactive GO. CYR61 could induce the production of IL-6 and CCL20 in cultured GO orbital fibroblasts. The expression of CYR61 in cultured GO orbital fibroblasts was upregulated via TNF-α stimulation. Secondly, we pretreated cultured GO orbital fibroblasts using simvastatin, a statin, followed by TNF-α stimulation. The data revealed that simvastatin could inhibit TNF-α-induced CYR61 expression by modulating the activity of transcription factor FoxO3a. Our results provided insights into some cellular mechanisms that may explain the possible protective effects of simvastatin against the development of GO.
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Li H, Ma C, Liu W, He J, Li K. Gypenosides Protect Orbital Fibroblasts in Graves Ophthalmopathy via Anti-Inflammation and Anti-Fibrosis Effects. Invest Ophthalmol Vis Sci 2020; 61:64. [PMID: 32462203 PMCID: PMC7405800 DOI: 10.1167/iovs.61.5.64] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Purpose To investigate the effect of Gypenosides (Gyps) on the inflammation and fibrosis in orbital fibroblasts (OFs) in Graves ophthalmopathy (GO). Methods Bioinformatics analyses were performed to identify the enriched genes and signaling pathways related to Gyps function. For ex vivo experiments, OFs were cultured from orbital connective tissues from patients with GO. OF proliferation was estimated by Cell Counting Kit-8 assay. Effects of Gyps treatment on interleukin (IL)-1β-induced inflammation and transforming growth factor-β1 (TGF-β1)-induced fibrosis were evaluated by real-time quantitative PCR (RT-qPCR), enzyme-linked immunosorbent assay (ELISA), and Western blotting. OFs were treated with IL-1β or TGF-β1 in the absence or presence of Gyps pretreatment, and the levels of related mRNA or proteins were evaluated by RT-qPCR or ELISA. Results Eight inflammation-related target genes and nine fibrosis-related target genes were screened out. These genes were mainly enriched in pathways corresponding to inflammation and fibrosis, respectively. IL-1β-induced upregulation of inflammatory cytokines, and TGF-β-induced upregulation of fibrotic mediators in OFs were downregulated by Gyps. Moreover, Gyps reduced the activation of Toll like receptors 4/nuclear factor-κ B signaling and TGF-β1/SMAD2/SMAD4 signaling in GO OFs. Conclusions Gyps could protect GO-derived OFs against IL-1β-induced inflammation and TGF-β1-induced fibrosis. Thus Gyps might have therapeutic potential on inflammation and fibrosis in GO.
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Kurashige T, Nakajima Y, Shimamura M, Yamada M, Nagayama Y. Hormonal Regulation of Autophagy in Thyroid PCCL3 Cells and the Thyroids of Male Mice. J Endocr Soc 2020; 4:bvaa054. [PMID: 32671315 PMCID: PMC7347287 DOI: 10.1210/jendso/bvaa054] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/20/2019] [Accepted: 05/07/2020] [Indexed: 01/30/2023] Open
Abstract
Autophagy is an evolutionarily conserved catabolic process by which cells degrade intracellular proteins and organelles in the lysosomes and recycle their metabolites. We have recently demonstrated the crucial role for the basal level of autophagic activity in thyrocyte survival and homeostasis using the thyroid-specific autophagy knockout mice. Here, we first studied hormonal regulation of autophagy in thyrocytes in vitro using a rat thyroid cell line PCCl3 and in vivo with mice. In cultured PCCl3 cells, thyroxine decreased microtubule-associated protein 1 light chain 3 (LC3) puncta (a component of autophagosome) and increased p62 (an autophagy substrate) levels, showing thyroxine-suppression of autophagy. In contrast, TSH increased both LC3 puncta and p62 levels, but at the same time stabilized p62 protein by inhibiting p62 degradation, indicating TSH induction of autophagy. Our experiments with various inhibitors identified that both the cAMP-protein kinase (PK) A-cAMP response element binding protein/ERK and PKC signaling pathways regulates positively autophagic activity. The in vivo results obtained with wild-type mice treated with methimazole and perchlorate or thyroxine were consistent with in vitro results. Next, in thyroid-specific autophagy knockout mice treated with methimazole and perchlorate (that is, mice were placed under a stressed condition where enhanced autophagy was required) for 2 months, lower follicle sizes and lower thyroglobulin contents in thyrocytes were observed, suggesting impaired thyroglobulin production presumably from insufficient nutrient supply. We therefore conclude that TSH positively regulates autophagic activity through the cAMP-PKA-cAMP response element binding protein/ERK and PKC signaling pathways, whereas thyroid hormones inhibit its activity in thyrocytes. Metabolites produced by autophagy appear to be necessary for protein synthesis stimulated by TSH.
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Affiliation(s)
- Tomomi Kurashige
- Department of Molecular Medicine, Atomic Bomb Disease Institute, Nagasaki University, Nagasaki, Japan
| | - Yasuyo Nakajima
- Department of Internal Medicine, Division of Endocrinology and Metabolism, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Mika Shimamura
- Department of Molecular Medicine, Atomic Bomb Disease Institute, Nagasaki University, Nagasaki, Japan
| | - Masanobu Yamada
- Department of Internal Medicine, Division of Endocrinology and Metabolism, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Yuji Nagayama
- Department of Molecular Medicine, Atomic Bomb Disease Institute, Nagasaki University, Nagasaki, Japan
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Guo Y, Li H, Chen X, Yang H, Guan H, He X, Chen Y, Pokharel S, Xiao H, Li Y. Novel Roles of Chloroquine and Hydroxychloroquine in Graves' Orbitopathy Therapy by Targeting Orbital Fibroblasts. J Clin Endocrinol Metab 2020; 105:5813893. [PMID: 32249902 PMCID: PMC7183395 DOI: 10.1210/clinem/dgaa161] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Accepted: 03/28/2020] [Indexed: 02/07/2023]
Abstract
CONTEXT Graves' orbitopathy (GO) causes infiltrative exophthalmos by inducing excessive proliferation, adipogenesis, and glycosaminoglycan production in orbital fibroblasts (OFs). Interference with OF autophagy is a potential therapy for proptosis. OBJECTIVES Here, we aimed to evaluate the effects of chloroquine (CQ) and hydroxychloroquine (HCQ), the autophagy inhibitors commonly used in clinical practice, on OFs. DESIGN/SETTING/PARTICIPANTS OFs isolated from patients with GO (GO-OFs) or control individuals (non-GO-OFs) were cultured in proliferation medium (PM) or subjected to differentiation medium. OFs were treated with CQ or HCQ (0, 0.5, 2, and 10 μM), and subsequently examined in vitro. MAIN OUTCOME MEASURES CCK-8, EdU incorporation, and flow cytometry assays were used to assess cellular viability. Adipogenesis was assessed with Western blot analysis, real-time polymerase chain reaction (PCR) , and Oil Red O staining. Hyaluronan production was determined by real-time PCR and enzyme-linked immunosorbent assay. Autophagy flux was detected through red fluorescent protein (RFP)-green fluorescent protein (GFP)-LC3 fluorescence staining and Western blot analyses. RESULTS CQ/HCQ halted proliferation and adipogenesis in GO-OFs in a concentration-dependent manner through blockage of autophagy, phenotypes that were not detected in non-GO-OFs. The inhibitory effect of CQ/HCQ on hyaluronan secretion of GO-OFs was also concentration dependent, mediated by downregulation of hyaluronan synthase 2 rather than hyaluronidases. Moreover, CQ (10 μM) induced GO-OF apoptosis without aggravating oxidative stress. CONCLUSIONS The antimalarials CQ/HCQ affect proliferation, adipogenesis, and hyaluronan generation in GO-OFs by inhibiting autophagy, providing evidence that they can be used to treat GO as autophagy inhibitors.
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Affiliation(s)
- Yan Guo
- Department of Endocrinology and Diabetes Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Hai Li
- Department of Endocrinology and Diabetes Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Xueying Chen
- Department of Endocrinology and Diabetes Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Huasheng Yang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China
| | - Hongyu Guan
- Department of Endocrinology and Diabetes Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Xiaoying He
- Department of Endocrinology and Diabetes Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Yuxin Chen
- Department of Endocrinology and Diabetes Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Sunil Pokharel
- Department of Endocrinology and Diabetes Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Haipeng Xiao
- Department of Endocrinology and Diabetes Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Yanbing Li
- Department of Endocrinology and Diabetes Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
- Correspondence and Reprint Requests: Yanbing Li, M.D., Ph.D., 58 Zhongshan Road II, Guangzhou, Guangdong, 510080, China. E-mail:
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Wei YH, Liao SL, Wang SH, Wang CC, Yang CH. Simvastatin and ROCK Inhibitor Y-27632 Inhibit Myofibroblast Differentiation of Graves' Ophthalmopathy-Derived Orbital Fibroblasts via RhoA-Mediated ERK and p38 Signaling Pathways. Front Endocrinol (Lausanne) 2020; 11:607968. [PMID: 33597925 PMCID: PMC7883643 DOI: 10.3389/fendo.2020.607968] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Accepted: 12/14/2020] [Indexed: 12/20/2022] Open
Abstract
Transforming growth factor-β (TGF-β)-induced differentiation of orbital fibroblasts into myofibroblasts is an important pathogenesis of Graves' ophthalmopathy (GO) and leads to orbital tissue fibrosis. In the present study, we explored the antifibrotic effects of simvastatin and ROCK inhibitor Y-27632 in primary cultured GO orbital fibroblasts and tried to explain the molecular mechanisms behind these effects. Both simvastatin and Y-27632 inhibited TGF-β-induced α-smooth muscle actin (α-SMA) expression, which serves as a marker of fibrosis. The inhibitory effect of simvastatin on TGF-β-induced RhoA, ROCK1, and α-SMA expression could be reversed by geranylgeranyl pyrophosphate, an intermediate in the biosynthesis of cholesterol. This suggested that the mechanism of simvastatin-mediated antifibrotic effects may involve RhoA/ROCK signaling. Furthermore, simvastatin and Y-27632 suppressed TGF-β-induced phosphorylation of ERK and p38. The TGF-β-mediated α-SMA expression was suppressed by pharmacological inhibitors of p38 and ERK. These results suggested that simvastatin inhibits TGF-β-induced myofibroblast differentiation via suppression of the RhoA/ROCK/ERK and p38 MAPK signaling pathways. Thus, our study provides evidence that simvastatin and ROCK inhibitors may be potential therapeutic drugs for the prevention and treatment of orbital fibrosis in GO.
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Affiliation(s)
- Yi-Hsuan Wei
- Department of Ophthalmology, National Taiwan University Hospital, Taipei, Taiwan
- Graduate Institute of Clinical Medicine, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Shu-Lang Liao
- Department of Ophthalmology, National Taiwan University Hospital, Taipei, Taiwan
- Department of Ophthalmology, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Sen-Hsu Wang
- Department of Ophthalmology, National Taiwan University Hospital, Taipei, Taiwan
| | - Chia-Chun Wang
- Department of Ophthalmology, National Taiwan University Hospital, Taipei, Taiwan
| | - Chang-Hao Yang
- Department of Ophthalmology, National Taiwan University Hospital, Taipei, Taiwan
- Department of Ophthalmology, College of Medicine, National Taiwan University, Taipei, Taiwan
- *Correspondence: Chang-Hao Yang,
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Kim JA, Ahn D, Kim BY, Choi YJ, Shin HJ, Jang SY. Characterisation of human orbital fibroblasts cultivated from intraconal, nasal and central adipose tissues. Br J Ophthalmol 2019; 105:290-296. [PMID: 31488432 DOI: 10.1136/bjophthalmol-2018-313699] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2018] [Revised: 06/06/2019] [Accepted: 08/11/2019] [Indexed: 11/04/2022]
Abstract
PURPOSE To investigate the characteristics of human orbital fibroblasts (OFs) cultivated from intraconal, nasal and central adipose tissues. METHODS Intraconal adipose tissues were obtained during orbital decompression surgery for severe proptosis in nine patients with Graves' orbitopathy (GO). Nasal and central adipose tissues were obtained during upper eyelid blepharoplasty in nine patients with no history of GO. Human OFs were separately cultured from GO intraconal, non-GO nasal, non-GO central orbital adipose deposits. Human dermal fibroblasts were also cultured from redundant resected skin tissue obtained during upper eyelid blepharoplasty in normal controls. Expression of insulin-like growth factor 1 (IGF-1) and thyroid-stimulating hormone (TSH) receptors were investigated using real-time quantitative reverse transcription PCR. Protein levels of interleukin-1β (IL-1β)-induced inflammatory cytokines and generated intracellular reactive oxygen species (ROS) were determined. RESULTS IGF-1 and TSH receptor RNA expressions of GO intraconal OFs and non-GO nasal OFs were higher than non-GO central OFs and dermal fibroblasts. The expression of IL-1β induced the IL-6, IL-8, intercellular adhesion molecule-1 and cyclooxygenase-2 of GO intraconal OFs, and non-GO nasal OFs were higher than non-GO central OFs and dermal fibroblasts. Intracellular ROS generation in GO intraconal OFs and non-GO nasal OFs were higher than in non-GO central OFs and dermal fibroblasts, although the differences were not statistically significant. CONCLUSIONS Non-GO nasal OFs had similar characteristics to GO intraconal OFs. We recommend the use of nasal adipose tissue in order to culture OFs as a normal control involving in vitro experiments.
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Affiliation(s)
- Jin A Kim
- Department of Ophthalmology, Soonchunhyang University Bucheon Hospital, Bucheon, Gyeonggi-do, Republic of Korea
| | - Donghyuck Ahn
- Department of Ophthalmology, Soonchunhyang University Bucheon Hospital, Bucheon, Gyeonggi-do, Republic of Korea
| | - Bo-Yeon Kim
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, Bucheon, Republic of Korea
| | - Yeon Jeong Choi
- Department of Ophthalmology, Soonchunhyang University Bucheon Hospital, Bucheon, Gyeonggi-do, Republic of Korea
| | - Hyun Jung Shin
- Department of Ophthalmology, Soonchunhyang University Bucheon Hospital, Bucheon, Gyeonggi-do, Republic of Korea
| | - Sun Young Jang
- Department of Ophthalmology, Soonchunhyang University Bucheon Hospital, Bucheon, Gyeonggi-do, Republic of Korea
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Lanzolla G, Vannucchi G, Ionni I, Campi I, Sileo F, Lazzaroni E, Marinò M. Cholesterol Serum Levels and Use of Statins in Graves' Orbitopathy: A New Starting Point for the Therapy. Front Endocrinol (Lausanne) 2019; 10:933. [PMID: 32038490 PMCID: PMC6987298 DOI: 10.3389/fendo.2019.00933] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Accepted: 12/23/2019] [Indexed: 12/14/2022] Open
Abstract
Graves' Orbitopathy (GO) is the most frequent extrathyroidal manifestation of Graves' disease (GD). Its ultimate cause remains unclear, but it is commonly considered an autoimmune disorder due to self recognition of autoantigens constitutively expressed by orbital fibroblasts (OFs), and thyroid epithelial cells. High dose intravenous glucocorticoids (ivGC) are the most commonly used treatment for moderately severe and active GO. However, based on the complex pathogenesis of GO, a number of factors may have a protective and maybe a therapeutic role. The use of other medications improving the effect of GC may increase the overall effectiveness of the therapy and reduce GC doses, thereby limiting side effects. Recently, a possible protective role of 3-hydroxy-3-methylglutaryl-coenzyme reductase inhibitors, the so-called statins, and perhaps of lowering cholesterol levels, has been proposed. Thus, statins have been reported to be associated with a reduced frequency of GO in GD patients and in recent cross-sectional and retrospective studies a significant correlation was found between the occurrence of GO and both total and LDL-cholesterol in patients with a GD of relatively recent onset, suggesting a role of cholesterol in the development of GO. Moreover, a correlation was found between the GO clinical activity score and total as well as LDL-cholesterol in untreated GO patients, depending on GO duration, indicating a role of cholesterol on GO activity. Therefore, statin treatment may be beneficial for GO. Here we review this subject, which offers new therapeutic perspectives for patients with GO.
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Affiliation(s)
- Giulia Lanzolla
- Endocrinology Units, Department of Clinical and Experimental Medicine, University of Pisa and University Hospital of Pisa, Pisa, Italy
| | - Guia Vannucchi
- Department of Endocrine and Metabolic Diseases, Istituto Auxologico Italiano Istituto di Ricovero e Cura a Carattere Scientifico, Milan, Italy
| | - Ilaria Ionni
- Endocrinology Units, Department of Clinical and Experimental Medicine, University of Pisa and University Hospital of Pisa, Pisa, Italy
| | - Irene Campi
- Department of Endocrine and Metabolic Diseases, Istituto Auxologico Italiano Istituto di Ricovero e Cura a Carattere Scientifico, Milan, Italy
- Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy
| | - Federica Sileo
- Department of Endocrine and Metabolic Diseases, Istituto Auxologico Italiano Istituto di Ricovero e Cura a Carattere Scientifico, Milan, Italy
| | - Elisa Lazzaroni
- Endocrinology and Metabolism Unit, Fondazione IRCCS Cà Granda, University of Milan, Milan, Italy
| | - Michele Marinò
- Endocrinology Units, Department of Clinical and Experimental Medicine, University of Pisa and University Hospital of Pisa, Pisa, Italy
- *Correspondence: Michele Marinò
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Faustino LC, Lombardi A, Madrigal-Matute J, Owen RP, Libutti SK, Tomer Y. Interferon-α Triggers Autoimmune Thyroid Diseases via Lysosomal-Dependent Degradation of Thyroglobulin. J Clin Endocrinol Metab 2018; 103:3678-3687. [PMID: 30113675 PMCID: PMC6179164 DOI: 10.1210/jc.2018-00541] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Accepted: 07/27/2018] [Indexed: 12/16/2022]
Abstract
CONTEXT Autoimmune thyroid diseases (AITDs) arise from complex interactions among genetic, epigenetic, and environmental factors. Thyroglobulin (TG) is a major susceptibility gene for both Graves disease and Hashimoto thyroiditis. Interferon-α (IFNα), a cytokine secreted during viral infections, has emerged as a key trigger of AITD. We have shown that IFNα upregulates TG transcription; however, how the upregulation of TG transcription by IFNα triggers AITD is still unknown. OBJECTIVE To evaluate how IFNα triggers AITD by testing its effects on TG processing. DESIGN We exposed human thyroid cells to IFNα and evaluated its effects on TG expression and processing. RESULTS Human thyroid cells exposed to INFα had increased levels of TG mRNA but reduced TG protein levels, indicating TG protein degradation. IFNα induced endoplasmic reticulum stress, but surprisingly, neither the use of chemical chaperones nor proteasome inhibitor prevented IFNα-induced TG degradation. IFNα also increased LysoTracker staining and autophagy flux measured by net light chain 3 (LC3)-II and p62 fluxes. In addition, expression of autophagy markers LC3 and autophagy-related gene 5 was higher in thyroid tissues from patients with AITD. Finally, blocking lysosomal degradation prevented IFNα-induced degradation of TG. CONCLUSION We have shown in this study IFNα-induced lysosomal-dependent degradation of TG in human thyroid cells. Our findings suggest that during viral infections, local thyroidal IFNα production can lead to lysosomal TG degradation, releasing pathogenic TG peptides that can trigger AITD.
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Affiliation(s)
- Larissa C Faustino
- Department of Medicine, Albert Einstein College of Medicine, Bronx, New York
- Correspondence and Reprint Requests: Larissa C. Faustino, PhD, Department of Medicine, Albert Einstein College of Medicine, 1300 Morris Park Ave, Forchheimer 702, Bronx, New York 10461. E-mail:
| | - Angela Lombardi
- Department of Medicine, Albert Einstein College of Medicine, Bronx, New York
| | - Julio Madrigal-Matute
- Department of Developmental and Molecular Biology and Institute for Aging Studies, Albert Einstein College of Medicine, Bronx, New York
| | - Randall P Owen
- Department of Surgery, Icahn School of Medicine at Mount Sinai, New York, New York
| | - Steven K Libutti
- Rutgers Cancer Institute of New Jersey, New Brunswick, New Jersey
| | - Yaron Tomer
- Department of Medicine, Albert Einstein College of Medicine, Bronx, New York
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Li H, Zhang Y, Min J, Gao L, Zhang R, Yang Y. Astragaloside IV attenuates orbital inflammation in Graves' orbitopathy through suppression of autophagy. Inflamm Res 2017; 67:117-127. [PMID: 29127443 DOI: 10.1007/s00011-017-1100-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2017] [Revised: 09/26/2017] [Accepted: 09/27/2017] [Indexed: 12/01/2022] Open
Abstract
INTRODUCTION Graves' orbitopathy (GO) is an autoimmune inflammatory disorder affecting the orbit around the eye. Astragaloside IV (AS-VI) is the main active ingredient of the Chinese herbal medicine Huangqi (Radix Astragali Mongolici). AS-IV exhibits antioxidant and anti-inflammatory properties, and shows therapeutic potential in a number of ischemic and inflammatory diseases; however, its pharmaceutical activities in GO remain undefined. MATERIALS AND METHODS In this study, we investigated the effects of AS-IV on interleukin (IL)-1β-induced orbital fibroblast inflammation in vitro and GO orbital inflammation and ocular histopathological changes in vivo, as well as the underlying mechanisms responsible for these effects. RESULTS AND CONCLUSION The results show that IL-1β increased mRNA expression of the inflammatory cytokines IL-6, IL-8, TNF-α, and MCP-1 in cultured orbital fibroblasts. This IL-1β-induced inflammation was accompanied by increased autophagic activity as reflected in increased Beclin-1 and Agt-5 expression, as well as LC3-I to LC3-II conversion. Pretreatment with the autophagy inhibitors 3-MA and bafilomycin A1, or silencing of autophagy-related proteins Beclin-1 and Atg-5, prevented IL-1β-induced orbital fibroblast inflammation, while pretreatment with the autophagy activator rapamycin had the opposite effects. These data suggested that autophagy was involved in GO orbital inflammation. AS-IV treatment significantly decreased IL-1β-induced inflammatory cytokine production in orbital fibroblasts in vitro and attenuated GO orbital inflammation, fat accumulation, collagen deposition, and macrophage infiltration in vivo. These in vitro and in vivo protective effects of AS-IV against GO were accompanied by decreased autophagic activities in orbital fibroblasts and GO orbital tissues, respectively. Collectively, our findings suggested that AS-IV protects against GO through suppression of autophagy. Thus, AS-IV may have preventive benefits for GO.
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Affiliation(s)
- Hong Li
- Department of Endocrinology, Shanghai University of Traditional Chinese Medicine Longhua Affiliated Hospital, 725 South Wanpin Road, Shanghai, 200032, People's Republic of China.
| | - Yali Zhang
- Institute of Spleen and Stomach Disease, Shanghai University of Traditional Chinese Medicine Longhua Affiliated Hospital, 725 South Wanpin Road, Shanghai, 200032, People's Republic of China
| | - Jie Min
- Department of Endocrinology, Shanghai University of Traditional Chinese Medicine Longhua Affiliated Hospital, 725 South Wanpin Road, Shanghai, 200032, People's Republic of China
| | - Long Gao
- Department of Endocrinology, Shanghai University of Traditional Chinese Medicine Longhua Affiliated Hospital, 725 South Wanpin Road, Shanghai, 200032, People's Republic of China
| | - Ren Zhang
- Department of Endocrinology, Shanghai University of Traditional Chinese Medicine Longhua Affiliated Hospital, 725 South Wanpin Road, Shanghai, 200032, People's Republic of China
| | - Yucheng Yang
- Department of Endocrinology, Shanghai University of Traditional Chinese Medicine Longhua Affiliated Hospital, 725 South Wanpin Road, Shanghai, 200032, People's Republic of China
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Long M, Li X, Li L, Dodson M, Zhang DD, Zheng H. Multifunctional p62 Effects Underlie Diverse Metabolic Diseases. Trends Endocrinol Metab 2017; 28:818-830. [PMID: 28966079 DOI: 10.1016/j.tem.2017.09.001] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Revised: 09/03/2017] [Accepted: 09/05/2017] [Indexed: 12/17/2022]
Abstract
p62, a protein capable of binding both ubiquitin and autophagy substrates, is well established as a key regulator in cancer and neurodegenerative diseases. Recently, there has been accumulating evidence that p62 is also a pivotal regulator in metabolic diseases, such as obesity, T2DM, NAFLD, metabolic bone disease, gout and thyroid disease. This review summarizes the emerging role of p62 on these diseases by considering its functional domains, phenotypes in genetically modified animals, clinically observed alterations, and its effects on downstream metabolic signaling pathways. At the same time, we highlight the need to explore the roles played by p62 in the gastrointestinal environment and immune system, and the extent to which its elevated expression may confer protection against metabolic disorders.
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Affiliation(s)
- Min Long
- Department of Endocrinology, Translational Research Key Laboratory for Diabetes, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, China; These authors contributed equally to this work
| | - Xing Li
- Department of Endocrinology, Translational Research Key Laboratory for Diabetes, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, China; These authors contributed equally to this work
| | - Li Li
- Department of Endocrinology, Translational Research Key Laboratory for Diabetes, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, China; These authors contributed equally to this work
| | - Matthew Dodson
- Department of Pharmacology and Toxicology, College of Pharmacy, University of Arizona, Tucson, AZ 85721, USA
| | - Donna D Zhang
- Department of Pharmacology and Toxicology, College of Pharmacy, University of Arizona, Tucson, AZ 85721, USA
| | - Hongting Zheng
- Department of Endocrinology, Translational Research Key Laboratory for Diabetes, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, China.
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Pingmu Decoction Induces Orbital Preadipocytes Apoptosis In Vitro. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2017; 2017:2109249. [PMID: 28484500 PMCID: PMC5412165 DOI: 10.1155/2017/2109249] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Revised: 02/23/2017] [Accepted: 03/20/2017] [Indexed: 12/31/2022]
Abstract
Pingmu Decoction is the Traditional Chinese Medicine which has treated Graves' Ophthalmopathy (GO) in the inactive stage for more than ten years. This study was to explore the mechanism of Pingmu Decoction of inhibiting preadipocytes in GO patients from differentiating into mature adipocytes. Human orbital preadipocytes were isolated and cultured through tissue explant method. Orbital preadipocytes were induced into mature adipocytes. The medicinal serum was prepared from rats. The cells were treated with medicinal serum which were divided into three groups, low dose group (5%), medium dose group (10%), and high dose group (20%). The cells viabilities were observed by Oil Red O staining, MTT method, and Annexin V/propidium iodide (PI) double staining. Effect of Pingmu Decoction on cell apoptosis rate of orbital matured adipocytes was measured by flow cytometry. The genes Fas and Fas L from cell groups were tested by RT-PCR and Western blotting. The expression of master adipogenic transcription factors, including peroxisome proliferation-activity receptor (PPAR) γ and CCAAT/enhancer binding protein (C/EBP) α, was tested by Western blotting. Pingmu Decoction could reduce orbital preadipocytes viability and induce apoptosis of mature adipocyte via Fas/Fas L signaling pathway. Pingmu Decoction reduced lipid accumulation and downregulated the expression of PPAR γ and C/EBP α. Pingmu Decoction may play a therapeutic effect by reducing the accumulation of orbital adipocytes.
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Li H, Yuan Y, Zhang Y, Zhang X, Gao L, Xu R. Icariin Inhibits AMPK-Dependent Autophagy and Adipogenesis in Adipocytes In vitro and in a Model of Graves' Orbitopathy In vivo. Front Physiol 2017; 8:45. [PMID: 28243204 PMCID: PMC5303717 DOI: 10.3389/fphys.2017.00045] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Accepted: 01/17/2017] [Indexed: 12/22/2022] Open
Abstract
Graves' orbitopathy (GO), an extrathyroidal manifestation of Graves' disease, is an inflammatory autoimmune disorder of the orbit that involves the differentiation of precursor cells into mature adipocytes and retro-orbital adipose tissue accumulation. Here, we examined the involvement of autophagy in adipogenesis and explored the effects of icariin, a flavonoid isolated from the genus Epimedium with a wide range of biological and pharmacological effects, on autophagy and adipogenesis in 3T3-L1 preadipocytes and in a mouse model of GO. Microscopic examination of autophagosome formation and lipid droplet accumulation by Oil Red O staining, and western blot assessment of autophagic markers in the presence of the autophagy inhibitors Asn and 3-MA showed that autophagy is essential for adipogenesis. Icariin inhibited the differentiation of preadipocytes into mature adipocytes by suppressing autophagy, and these effects were mediated by the inhibition of AMPK/mTOR pathway activation. In a mouse model of thyroid stimulating hormone receptor induced GO, icariin reduced orbital muscle adipose tissue expansion and lipid droplet accumulation by inhibiting AMPK/mTOR mediated autophagy. Collectively, these results reveal a potential mechanism underlying the protective effects of icariin against autophagy induced adipogenesis and suggest that icariin could be developed as a new therapeutic candidate for the prevention and treatment of GO.
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Affiliation(s)
- Hong Li
- Department of Endocrinology, Longhua Hospital Shanghai University of Traditional Chinese Medicine Shanghai, China
| | - Yifei Yuan
- Department of Ophthalmology, Eye and ENT Hospital of Fudan University Shanghai, China
| | - Yali Zhang
- Institute of Spleen and Stomach Disease, Longhua Hospital Shanghai University of Traditional Chinese Medicine Shanghai, China
| | - Xia Zhang
- Department of Endocrinology, Longhua Hospital Shanghai University of Traditional Chinese Medicine Shanghai, China
| | - Long Gao
- Department of Endocrinology, Longhua Hospital Shanghai University of Traditional Chinese Medicine Shanghai, China
| | - Rongjuan Xu
- Department of Endocrinology, Longhua Hospital Shanghai University of Traditional Chinese Medicine Shanghai, China
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Chai P, Ni H, Zhang H, Fan X. The Evolving Functions of Autophagy in Ocular Health: A Double-edged Sword. Int J Biol Sci 2016; 12:1332-1340. [PMID: 27877085 PMCID: PMC5118779 DOI: 10.7150/ijbs.16245] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2016] [Accepted: 08/08/2016] [Indexed: 12/19/2022] Open
Abstract
Autophagy plays an adaptive role in cell survival, development, differentiation and intracellular homeostasis. Autophagy is recognized as a 'self-cannibalizing' process that is active during stresses such as starvation, chemotherapy, infection, ageing, and oxygen shortage to protect organisms from various irritants and to regenerate materials and energy. However, autophagy can also lead to a form of programmed cell death distinct from apoptosis. Components of the autophagic pathway are constitutively expressed at a high level in the eye, including in the cornea, lens, retina, and orbit. In addition, the activation of autophagy is directly linked to the development of eye diseases such as age-related macular degeneration (ARMD), cataracts, diabetic retinopathy (DR), glaucoma, photoreceptor degeneration, ocular tumours, ocular infections and thyroid-associated ophthalmopathy (TAO). A high level of autophagy defends against external stress; however, excessive autophagy can result in deterioration, as observed in ocular diseases such as ARMD and DR. This review summarizes recent developments elucidating the relationship between autophagy and ocular diseases and the potential roles of autophagy in the pathogenesis and treatment of these diseases.
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Affiliation(s)
- Peiwei Chai
- Department of Ophthalmology, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, P.R. China
| | - Hongyan Ni
- Department of Ophthalmology, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, P.R. China
| | - He Zhang
- Department of Ophthalmology, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, P.R. China
| | - Xianqun Fan
- Department of Ophthalmology, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, P.R. China
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Bifulco M, Ciaglia E. Statin reduces orbitopathy risk in patients with Graves' disease by modulating apoptosis and autophagy activities. Endocrine 2016; 53:649-50. [PMID: 26438397 DOI: 10.1007/s12020-015-0762-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/24/2015] [Accepted: 09/24/2015] [Indexed: 10/23/2022]
Abstract
Statins use has been associated with reduced risk for developing orbitopathy among patients with Graves' disease. We hypothesize that statin reduces orbitopathy risk mainly by modulating both apoptosis and autophagy activities in patients with Graves' disease.
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Affiliation(s)
- Maurizio Bifulco
- Department of Medicine and Surgery, University of Salerno, Via Salvatore Allende, 84081, Baronissi, Salerno, Italy.
| | - Elena Ciaglia
- Department of Medicine and Surgery, University of Salerno, Via Salvatore Allende, 84081, Baronissi, Salerno, Italy
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