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Liu X, Wang H, Wang X, Jiang X, Jin Y, Han Y, Zhang Z. Identification and verification of inflammatory biomarkers for primary Sjögren's syndrome. Clin Rheumatol 2024; 43:1335-1352. [PMID: 38376769 PMCID: PMC10944815 DOI: 10.1007/s10067-024-06901-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2023] [Revised: 10/04/2023] [Accepted: 02/01/2024] [Indexed: 02/21/2024]
Abstract
INTRODUCTION Primary Sjögren's syndrome (pSS) is an autoimmune disease characterized by inflammatory infiltration, and dysfunction of the salivary and lacrimal glands. This research aimed to explore the disease pathogenesis and improve the diagnosis and treatment of pSS by mining inflammation-associated biomarkers. METHODS Five pSS-related datasets were retrieved from the Gene Expression Omnibus (GEO) database. Inflammation-associated biomarkers were determined by the least absolute shrinkage and selection operator (LASSO) and support vector machines recursive feature elimination (SVM-RFE). Single sample gene set enrichment analysis (ssGSEA) was implemented to profile the infiltration levels of immune cells. Real-time quantitative PCR (RT-qPCR) verified the expression of biomarkers in clinical samples. RESULTS Four genes (LY6E, EIF2AK2, IL15, and CXCL10) were screened as inflammation-associated biomarkers in pSS, the predictive performance of which were determined among three pSS-related datasets (AUC > 0.7). Functional enrichment results suggested that the biomarkers were involved in immune and inflammation-related pathways. Immune infiltration analysis revealed that biomarkers were notably connected with type 2 T helper cells, regulatory T cells which were significantly expressed between pSS and control. TESTOSTERONE and CYCLOSPORINE were predicted to take effect by targeting CXCL10 and IL15 in pSS, respectively. CONCLUSION Four inflammation-associated biomarkers (LY6E, EIF2AK2, IL15, and CXCL10) were explored, and the underlying regulatory mechanisms and targeted drugs associated with these biomarkers were preliminarily investigated according to a series of bioinformatics methods based on the online datasets of pSS, which provided a reference for understanding the pathogenesis of pSS. Key Points • Inflammation-associated biomarkers (LY6E, EIF2AK2, IL15, and CXCL10) were firstly identified in Sjögren's syndrome based on LASSO and SVM-RFE analyses. • CXCL10, EIF2AK2 and LY6E were prominently positively correlated with immature B cells, while IL15 were significantly negatively correlated with memory B cells in Sjögren's syndrome. • LY6E, EIF2AK2, IL15, and CXCL10 were significantly more highly expressed in clinical Sjögren's syndrome samples compared to healthy control samples, which was consistent with the analysis results of the GEO database. •LY6E, EIF2AK2, IL15, and CXCL10 might be used as the biomarkers for the treatment and diagnosis of Sjögren's syndrome.
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Affiliation(s)
- Xiaodan Liu
- Department of Stomatology, Peking University Third Hospital, Haidian District, 49 North Garden Road, Beijing, 100191, China
| | - Haojie Wang
- Department of Stomatology, Peking University Third Hospital, Haidian District, 49 North Garden Road, Beijing, 100191, China
| | - Xiao Wang
- Department of Stomatology, Peking University Third Hospital, Haidian District, 49 North Garden Road, Beijing, 100191, China
| | - Xiaodan Jiang
- Department of Ophthalmology, Beijing Key Laboratory of Restoration of Damaged Ocular Nerve, Peking University Third Hospital, Peking University Third Hospital, Beijing, 100191, China
| | - Yinji Jin
- Department of Rheumatology and Immunology, Peking University Third Hospital, Beijing, 100191, China
| | - Ying Han
- Department of Oral Medicine, Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering, Haidian District, 22 Zhongguancun South Avenue, Beijing, 100081, China.
| | - Zhihui Zhang
- Department of Stomatology, Peking University Third Hospital, Haidian District, 49 North Garden Road, Beijing, 100191, China.
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Fox RI, Fox CM, McCoy SS. Emerging treatment for Sjögren's disease: a review of recent phase II and III trials. Expert Opin Emerg Drugs 2023:1-14. [PMID: 37127914 DOI: 10.1080/14728214.2023.2209720] [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: 05/03/2023]
Abstract
INTRODUCTION Sjögren's Disease, SjD, is a systemic autoimmune disorder characterized by reduced function of the salivary and lacrimal glands. Patients suffer from dryness, fatigue, and pain and may present with or without extra-glandular organ involvement. Symptoms limit SjD patients' quality of life and are the most difficult to improve with therapy. SjD patients are heterogeneous and clustering them into biologically similar subgroups might improve the efficacy of therapies. The need for therapies that address both the symptoms and extra glandular organ involvement of SjD presents an unmet opportunity that has recently attracted a growing interest in the pharmaceutical industry. AREAS COVERED The goal of this report is to review recent phase II/III studies in SjD. To accomplish our goal, we performed a literature search for phase II/III studies and abstracts recently presented at conferences. EXPERT OPINION This review allows updates the reader on the multitude of recent phase II/III clinical trials. We speculate on how subtypes of SjD will drive future therapeutic targeting and inform pathogenesis.
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Affiliation(s)
- Robert I Fox
- Scripps Memorial Hospital and Research Foundation, San Diego, CA, United States
| | - Carla M Fox
- Scripps Memorial Hospital and Research Foundation, San Diego, CA, United States
| | - Sara S McCoy
- University of Wisconsin-Madison Ringgold standard institution, Madison, United States
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Gao R, Pu J, Wu Z, Tang J, Wang X. Osteoarthritis or arthritis? Toward understanding of primary Sjögren's syndrome patients with arthralgia. J Orthop Surg Res 2023; 18:41. [PMID: 36647153 PMCID: PMC9841668 DOI: 10.1186/s13018-023-03513-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Accepted: 01/07/2023] [Indexed: 01/18/2023] Open
Abstract
OBJECTIVE To identify primary Sjögren's syndrome (pSS) patients with arthralgia at risk for osteoarthritis (OA) or arthritis. METHODS This study included 368 pSS patients admitted to a mono-centric from March 2010 to December 2020. Patients were divided into groups according to whether complicated with OA or arthritis. Data were analyzed to determine the differences in demographical characteristics, symptoms, and laboratory examination. RESULTS The involvement of the OA joints was predominately knee and spine sites (including cervical and lumbar spine degeneration). When diagnosing arthritis, it was mainly peripheral symmetric polyarthritis, the most affected sites were the interphalangeal and metacarpophalangeal joints. There were significant differences in age, disease duration, uric acid (UA), and total cholesterol (TC) between pSS-OA and pSS-nOA patients (P < 0.050). Logistic regression analysis showed that age (OR = 1.965; P = 0.009) and joint pain (OR = 3.382; P < 0.001) were dangerous factors associated with OA. Interestingly, although the level of UA, TC, and triglycerides (TG) was shown to be positive with OA, there was no statistical significance after the OR was computed in the four-cell table. In pSS-arthritis, EULAR Sjögren's syndrome disease activity index (ESSDAI) (P = 0.011), the frequency of joint pain (P < 0.001), and muscular involvement (P = 0.037) were higher than non-arthritis group. In pSS patients only presenting with joint pain, arthritis patients had higher ESSDAI and system involvements, but lower UA and TG levels compared with OA group (P < 0.050). CONCLUSION In pSS patients with arthralgia, OA accounted for the majority. pSS patients with advanced age and more pronounced metabolic characteristics, such as elevated blood lipids and uric acid, was a key factor in groups at risk for OA. However, arthritis patients had higher rates of dry mouth and eye, higher disease activity, antibodies positive, and more organs damage. In the future, it may be necessary to be more cautious in the diagnosis of joint manifestations in pSS patients in order to make the appropriate treatments.
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Affiliation(s)
- Ronglin Gao
- grid.24516.340000000123704535Department of Rheumatology and Immunology, Tongji Hospital, School of Medicine, Tongji University, No. 389 Xincun Road, Shanghai, 200065 China
| | - Jincheng Pu
- grid.24516.340000000123704535Department of Rheumatology and Immunology, Tongji Hospital, School of Medicine, Tongji University, No. 389 Xincun Road, Shanghai, 200065 China
| | - Zhenzhen Wu
- grid.24516.340000000123704535Department of Rheumatology and Immunology, Tongji Hospital, School of Medicine, Tongji University, No. 389 Xincun Road, Shanghai, 200065 China
| | - Jianping Tang
- grid.24516.340000000123704535Department of Rheumatology and Immunology, Tongji Hospital, School of Medicine, Tongji University, No. 389 Xincun Road, Shanghai, 200065 China
| | - Xuan Wang
- grid.24516.340000000123704535Department of Rheumatology and Immunology, Tongji Hospital, School of Medicine, Tongji University, No. 389 Xincun Road, Shanghai, 200065 China
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He J, Chen J, Miao M, Zhang R, Cheng G, Wang Y, Feng R, Huang B, Luan H, Jia Y, Jin Y, Zhang X, Shao M, Wang Y, Zhang X, Li J, Zhao X, Wang H, Liu T, Xiao X, Zhang X, Su Y, Mu R, Ye H, Li R, Liu X, Liu Y, Li C, Liu H, Hu F, Guo J, Liu W, Zhang WB, Jacob A, Ambrus JL, Ding C, Yu D, Sun X, Li Z. Efficacy and Safety of Low-Dose Interleukin 2 for Primary Sjögren Syndrome: A Randomized Clinical Trial. JAMA Netw Open 2022; 5:e2241451. [PMID: 36355371 PMCID: PMC9650609 DOI: 10.1001/jamanetworkopen.2022.41451] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
IMPORTANCE Primary Sjögren syndrome (pSS) is a systemic autoimmune disease associated with dysregulated immune cells, with no efficient therapy. There is a need to study potential therapeutic approaches. OBJECTIVE To investigate the efficacy, safety, and immune response of low-dose interleukin 2 (LD-IL-2) in the treatment of pSS. DESIGN, SETTING, AND PARTICIPANTS A double-blind, placebo-controlled randomized clinical trial was conducted with a 2-group superiority design from June 2015 to August 2017. Sixty patients, aged 18 to 70 years, were recruited from Peking University People's Hospital. Efficacy analyses were based on the intention-to-treat (ITT) principle. Data were analyzed from December 2018 to March 2020. INTERVENTIONS Patients with pSS were treated with LD-IL-2 or placebo for 12 weeks and accompanied by 12 weeks of follow-up. MAIN OUTCOMES AND MEASURES The primary end point was defined as a 3-point or greater improvement on the European League Against Rheumatism Sjögren's Syndrome Disease Activity Index (ESSDAI) by week 24. The secondary end points included other clinical responses, safety, and changes of immune cell subsets at week 12 and 24. RESULTS Sixty patients with pSS were recruited, with 30 in the LD-IL-2 group (mean [SD] age, 47.6 [12.8] years; 30 [100%] women) and 30 in the placebo group (mean [SD] age, 51.0 [11.9] years; 30 [100%] women), and 57 completed the trial. More patients in the LD-IL-2 group (20 [66.7%]) achieved ESSDAI score reduction of at least 3 points than in the placebo group (8 [26.7%]) at week 24 (P = .004). There were greater resolutions of dryness, pain, and fatigue in the LD-IL-2 group than placebo group at week 12 (dryness: difference, -18.33 points; 95% CI, -28.46 to -8.21 points; P = .001; pain: difference, -10.33 points; 95% CI, -19.38 to -1.29 points; P = .03; fatigue: difference, -11.67 points; 95% CI, -20.65 to -2.68 points; P = .01). No severe adverse events were observed in either group. In addition, the LD-IL-2 group showed a significant decrease in infection compared with the placebo group (1 [3.3%] vs 9 [30.0%]; P = .006). Immunological analysis revealed that LD-IL-2 promoted an expansion of regulatory T cells and regulatory CD24highCD27+ B cells. CONCLUSIONS AND RELEVANCE In this randomized clinical trial, LD-IL-2 was effective and well tolerated in patients with pSS, and it restored immune balance, with enhanced regulatory T cells and CD24highCD27+ B cells. TRIAL REGISTRATION ClinicalTrials.gov Identifier: NCT02464319.
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Affiliation(s)
- Jing He
- Department of Rheumatology and Immunology, Beijing Key Laboratory for Rheumatism Mechanism and Immune Diagnosis, Peking University People’s Hospital, Beijing, China
| | - Jiali Chen
- Department of Rheumatology and Immunology, Beijing Key Laboratory for Rheumatism Mechanism and Immune Diagnosis, Peking University People’s Hospital, Beijing, China
| | - Miao Miao
- Department of Rheumatology and Immunology, Beijing Key Laboratory for Rheumatism Mechanism and Immune Diagnosis, Peking University People’s Hospital, Beijing, China
| | - Ruijun Zhang
- Department of Rheumatology and Immunology, Beijing Key Laboratory for Rheumatism Mechanism and Immune Diagnosis, Peking University People’s Hospital, Beijing, China
| | - Gong Cheng
- Department of Rheumatology and Immunology, Beijing Key Laboratory for Rheumatism Mechanism and Immune Diagnosis, Peking University People’s Hospital, Beijing, China
| | - Yifan Wang
- Department of Rheumatology and Immunology, Beijing Key Laboratory for Rheumatism Mechanism and Immune Diagnosis, Peking University People’s Hospital, Beijing, China
| | - Ruiling Feng
- Department of Rheumatology and Immunology, Beijing Key Laboratory for Rheumatism Mechanism and Immune Diagnosis, Peking University People’s Hospital, Beijing, China
| | - Bo Huang
- Department of Rheumatology and Immunology, Beijing Key Laboratory for Rheumatism Mechanism and Immune Diagnosis, Peking University People’s Hospital, Beijing, China
| | - Huijie Luan
- Department of Rheumatology and Immunology, Beijing Key Laboratory for Rheumatism Mechanism and Immune Diagnosis, Peking University People’s Hospital, Beijing, China
| | - Yuan Jia
- Department of Rheumatology and Immunology, Beijing Key Laboratory for Rheumatism Mechanism and Immune Diagnosis, Peking University People’s Hospital, Beijing, China
| | - Yuebo Jin
- Department of Rheumatology and Immunology, Beijing Key Laboratory for Rheumatism Mechanism and Immune Diagnosis, Peking University People’s Hospital, Beijing, China
| | - Xiaoying Zhang
- Department of Rheumatology and Immunology, Beijing Key Laboratory for Rheumatism Mechanism and Immune Diagnosis, Peking University People’s Hospital, Beijing, China
| | - Miao Shao
- Department of Rheumatology and Immunology, Beijing Key Laboratory for Rheumatism Mechanism and Immune Diagnosis, Peking University People’s Hospital, Beijing, China
| | - Yu Wang
- Center for Applied Statistics and School of Statistics, Renmin University of China, Beijing, China
| | - Xia Zhang
- Department of Rheumatology and Immunology, Beijing Key Laboratory for Rheumatism Mechanism and Immune Diagnosis, Peking University People’s Hospital, Beijing, China
| | - Jing Li
- Department of Rheumatology and Immunology, Beijing Key Laboratory for Rheumatism Mechanism and Immune Diagnosis, Peking University People’s Hospital, Beijing, China
| | - Xiaozhen Zhao
- Department of Rheumatology and Immunology, Beijing Key Laboratory for Rheumatism Mechanism and Immune Diagnosis, Peking University People’s Hospital, Beijing, China
| | - Han Wang
- Department of Rheumatology and Immunology, Beijing Key Laboratory for Rheumatism Mechanism and Immune Diagnosis, Peking University People’s Hospital, Beijing, China
| | - Tian Liu
- Department of Rheumatology and Immunology, Beijing Key Laboratory for Rheumatism Mechanism and Immune Diagnosis, Peking University People’s Hospital, Beijing, China
| | - Xian Xiao
- Department of Rheumatology and Immunology, Beijing Key Laboratory for Rheumatism Mechanism and Immune Diagnosis, Peking University People’s Hospital, Beijing, China
| | - Xuewu Zhang
- Department of Rheumatology and Immunology, Beijing Key Laboratory for Rheumatism Mechanism and Immune Diagnosis, Peking University People’s Hospital, Beijing, China
| | - Yin Su
- Department of Rheumatology and Immunology, Beijing Key Laboratory for Rheumatism Mechanism and Immune Diagnosis, Peking University People’s Hospital, Beijing, China
| | - Rong Mu
- Department of Rheumatology and Immunology, Beijing Key Laboratory for Rheumatism Mechanism and Immune Diagnosis, Peking University People’s Hospital, Beijing, China
| | - Hua Ye
- Department of Rheumatology and Immunology, Beijing Key Laboratory for Rheumatism Mechanism and Immune Diagnosis, Peking University People’s Hospital, Beijing, China
| | - Ru Li
- Department of Rheumatology and Immunology, Beijing Key Laboratory for Rheumatism Mechanism and Immune Diagnosis, Peking University People’s Hospital, Beijing, China
| | - Xu Liu
- Department of Rheumatology and Immunology, Beijing Key Laboratory for Rheumatism Mechanism and Immune Diagnosis, Peking University People’s Hospital, Beijing, China
| | - Yanying Liu
- Department of Rheumatology and Immunology, Beijing Key Laboratory for Rheumatism Mechanism and Immune Diagnosis, Peking University People’s Hospital, Beijing, China
| | - Chun Li
- Department of Rheumatology and Immunology, Beijing Key Laboratory for Rheumatism Mechanism and Immune Diagnosis, Peking University People’s Hospital, Beijing, China
| | - Huixin Liu
- Department of Clinical Epidemiology and Biostatistics, Peking University People’s Hospital, Beijing, China
| | - Fanlei Hu
- Department of Rheumatology and Immunology, Beijing Key Laboratory for Rheumatism Mechanism and Immune Diagnosis, Peking University People’s Hospital, Beijing, China
| | - Jianping Guo
- Department of Rheumatology and Immunology, Beijing Key Laboratory for Rheumatism Mechanism and Immune Diagnosis, Peking University People’s Hospital, Beijing, China
| | - Wanli Liu
- Institute for Immunology, School of Life Sciences, Tsinghua University, Beijing, China
| | - Wen-Bin Zhang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry & Physics of Ministry of Education, Center for Soft Matter Science and Engineering, College of Chemistry and Molecular Engineering, Peking University, Beijing, People’s Republic of China
| | | | | | - Changhai Ding
- Clinical Research Centre, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Di Yu
- The University of Queensland Diamantina Institute, Faculty of Medicine, The University of Queensland, Brisbane, Queensland, Australia
- Ian Frazer Centre for Children’s Immunotherapy Research, Child Health Research Centre, Faculty of Medicine, The University of Queensland, Brisbane, Queensland, Australia
| | - Xiaolin Sun
- Department of Rheumatology and Immunology, Beijing Key Laboratory for Rheumatism Mechanism and Immune Diagnosis, Peking University People’s Hospital, Beijing, China
| | - Zhanguo Li
- Department of Rheumatology and Immunology, Beijing Key Laboratory for Rheumatism Mechanism and Immune Diagnosis, Peking University People’s Hospital, Beijing, China
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing, China
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Atzeni F, Gozza F, Cafaro G, Perricone C, Bartoloni E. Cardiovascular Involvement in Sjögren’s Syndrome. Front Immunol 2022; 13:879516. [PMID: 35634284 PMCID: PMC9134348 DOI: 10.3389/fimmu.2022.879516] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2022] [Accepted: 03/22/2022] [Indexed: 12/26/2022] Open
Abstract
Sjögren Syndrome (SS) seems to be associated with a greater “overall risk” of cardiovascular (CV) and cerebrovascular events. Although not conventionally considered a feature of the disease, CV events represent a major burden in SS patients. CV risk is the consequence of a complex combination of multiple factors, including traditional risk factors and disease-related mechanisms. A complex relationships between disease-related features, endothelial dysfunction and traditional risk factor has been suggested. Several drugs are available for treating the systemic manifestations of SS, however they have shown positive effects on different outcomes of the disease, but until today the data on the role of these drugs on CV events are scarse. Given these data, the aim of this review was to evaluate the risk of CV risk in primary SS and the effect of the drugs on this manifestation.
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Affiliation(s)
- Fabiola Atzeni
- Rheumatology Unit, Department of Clinical and Experimental Medicine, University of Messina, Messina, Italy
- *Correspondence: Fabiola Atzeni,
| | - Francesco Gozza
- Rheumatology Unit, Department of Clinical and Experimental Medicine, University of Messina, Messina, Italy
| | - Giacomo Cafaro
- Rheumatology Unit, Department of Medicine and Surgery, University of Perugia, Perugia, Italy
| | - Carlo Perricone
- Rheumatology Unit, Department of Medicine and Surgery, University of Perugia, Perugia, Italy
| | - Elena Bartoloni
- Rheumatology Unit, Department of Medicine and Surgery, University of Perugia, Perugia, Italy
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Wang ZHIZ, Zheng QS, Liu HX, Li LJ. Development and Application of the Placebo Response Model in Clinical Trials for Primary Sjögren's Syndrome. Front Immunol 2021; 12:783246. [PMID: 34868062 PMCID: PMC8635096 DOI: 10.3389/fimmu.2021.783246] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2021] [Accepted: 10/28/2021] [Indexed: 01/18/2023] Open
Abstract
This study aimed to develop a placebo response model for pharmaceutical clinical trials of primary Sjogren's syndrome,and to quantitatively analyze the distribution and related factors influencing the placebo response to further optimize the design of clinical trials and evaluate the results of single-arm clinical trials. Public databases, including PubMed, Embase, and Cochrane Library were searched for reports on randomized placebo-controlled trials for Sjögren's syndrome which used the change from baseline in ESSDAI score as the primary outcome. The model-based meta-analysis method was used to evaluate the time course and the related influencing factors of the placebo response for ESSDAI in such clinical trials. A virtual placebo control group was constructed based on the final placebo response model to determine the treatment efficacy of belimumab and cyclosporine A for primary Sjögren's syndrome in a single-arm study. A total of 12 studies involving 450 subjects were included in the analysis. The established model described the time-course characteristics of the changes in ESSDAI score from the baseline in the 48 weeks placebo group. We found that the onset time of placebo response was approximately 12 weeks, and its efficacy plateaued at 48 weeks. The baseline ESSDAI score had a significant effect on the maximum value of the placebo response; the maximum value of the placebo response decreased by 0.552 for every 1 score rise in the baseline ESSDAI score. The efficacy of belimumab and cyclosporine A in the single-arm trial was comparable to that of the placebo response at the same baseline; no significant therapeutic advantage was observed. The placebo response model established in this study could provide a basis for designing clinical trials for primary Sjogren's syndrome in the future. It may also provide a reliable external efficacy control standard for single-arm clinical trials.
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Affiliation(s)
| | - Qing-Shan Zheng
- Center for Drug Clinical Research, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | | | - Lu-Jin Li
- Center for Drug Clinical Research, Shanghai University of Traditional Chinese Medicine, Shanghai, China
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Fox RI, Fox CM, Gottenberg JE, Dörner T. Treatment of Sjögren's syndrome: current therapy and future directions. Rheumatology (Oxford) 2021; 60:2066-2074. [PMID: 31034046 DOI: 10.1093/rheumatology/kez142] [Citation(s) in RCA: 50] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Revised: 03/08/2019] [Indexed: 12/12/2022] Open
Abstract
SS is usually described as having severe fatigue, dryness, diffuse pain, glandular swelling, and various extraglandular (systemic) manifestations. Clinical trials have generally failed because the vast majority of enrolled patients had no extraglandular manifestations at the time of enrolment but suffered from fatigue, dryness and pain that did not significantly respond to the study medication. A number of hypotheses on the pathogenesis of pSS have been put forward, including disturbances of innate and adaptive immunity as well as abnormalities of the interface between immune disorders and the neuro-endocrine system related to lacrimal and secretory gland dysfunction. Thus, future therapies must be designed for improvement of the symptoms of dry eyes and dry mouth, extraglandular disease, and fatigue and cognitive deficits. Given the inadequacies and limitations of current treatment options, we suggest that innovative directions involving interactions with neuroscientists and neuropsychiatrists together or combined with new immune targeting may be hold promise for better treating pSS.
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Affiliation(s)
- Robert I Fox
- Rheumatology Clinic, Scripps Memorial Hospital and Research Foundation, La Jolla, CA
| | - Carla M Fox
- Rheumatology Clinic, Scripps Memorial Hospital and Research Foundation, La Jolla, CA
| | - Jacques Eric Gottenberg
- Strasbourg University Hospital, National Center for Rare Systemic Autoimmune Diseases, Strasbourg, France
| | - Thomas Dörner
- Department of Medicine/Rheumatology and Clinical Immunology, Charite Universitätsmedizin Berlin & DRFZ Berlin, Berlin, Germany
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Park YJ, Yoo SA, Kim M, Kim WU. The Role of Calcium-Calcineurin-NFAT Signaling Pathway in Health and Autoimmune Diseases. Front Immunol 2020; 11:195. [PMID: 32210952 PMCID: PMC7075805 DOI: 10.3389/fimmu.2020.00195] [Citation(s) in RCA: 156] [Impact Index Per Article: 39.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Accepted: 01/24/2020] [Indexed: 01/05/2023] Open
Abstract
Calcium (Ca2+) is an essential signaling molecule that controls a wide range of biological functions. In the immune system, calcium signals play a central role in a variety of cellular functions such as proliferation, differentiation, apoptosis, and numerous gene transcriptions. During an immune response, the engagement of T-cell and B-cell antigen receptors induces a decrease in the intracellular Ca2+ store and then activates store-operated Ca2+ entry (SOCE) to raise the intracellular Ca2+ concentration, which is mediated by the Ca2+ release-activated Ca2+ (CRAC) channels. Recently, identification of the two critical regulators of the CRAC channel, stromal interaction molecule (STIM) and Orai1, has broadened our understanding of the regulatory mechanisms of Ca2+ signaling in lymphocytes. Repetitive or prolonged increase in intracellular Ca2+ is required for the calcineurin-mediated dephosphorylation of the nuclear factor of an activated T cell (NFAT). Recent data indicate that Ca2+-calcineurin-NFAT1 to 4 pathways are dysregulated in autoimmune diseases. Therefore, calcineurin inhibitors, cyclosporine and tacrolimus, have been used for the treatment of such autoimmune diseases as systemic lupus erythematosus and rheumatoid arthritis. Here, we review the role of the Ca2+-calcineurin–NFAT signaling pathway in health and diseases, focusing on the STIM and Orai1, and discuss the deregulated calcium-mediated calcineurin-NFAT pathway in autoimmune diseases.
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Affiliation(s)
- Yune-Jung Park
- POSTEC-CATHOLIC Biomedical Engineering Institute, The Catholic University of Korea, Seoul, South Korea.,Division of Rheumatology, Department of Internal Medicine, St. Vincent's Hospital, The Catholic University of Korea, Suwon, South Korea
| | - Seung-Ah Yoo
- POSTEC-CATHOLIC Biomedical Engineering Institute, The Catholic University of Korea, Seoul, South Korea.,Department of Biomedicine & Health Science, College of Medicine, The Catholic University of Korea, Seoul, South Korea
| | - Mingyo Kim
- Division of Rheumatology, Department of Internal Medicine, Gyeonsang National University Hospital, Jinju, South Korea
| | - Wan-Uk Kim
- POSTEC-CATHOLIC Biomedical Engineering Institute, The Catholic University of Korea, Seoul, South Korea.,Department of Biomedicine & Health Science, College of Medicine, The Catholic University of Korea, Seoul, South Korea.,Division of Rheumatology, Department of Internal Medicine, The Catholic University of Korea, Seoul, South Korea
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Brito-Zerón P, Retamozo S, Kostov B, Baldini C, Bootsma H, De Vita S, Dörner T, Gottenberg JE, Kruize AA, Mandl T, Ng WF, Seror R, Tzioufas AG, Vitali C, Bowman S, Mariette X, Ramos-Casals M. Efficacy and safety of topical and systemic medications: a systematic literature review informing the EULAR recommendations for the management of Sjögren's syndrome. RMD Open 2019; 5:e001064. [PMID: 31749986 PMCID: PMC6827762 DOI: 10.1136/rmdopen-2019-001064] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Revised: 09/26/2019] [Accepted: 09/29/2019] [Indexed: 12/18/2022] Open
Abstract
Objective To evaluate current evidence on the efficacy and safety of topical and systemic medications in patients with primary Sjögren syndrome (SjS) to inform European League Against Rheumatism treatment recommendations. Methods The MEDLINE, EMBASE and Cochrane databases were searched for case-control/prospective cohort studies, randomised controlled trials (RCTs) and systematic reviews. Results Current evidence in primary SjS patients fulfilling the 2002 criteria is based on the data from 9 RCTs, 18 prospective cohort studies and 5 case-control studies. Two Cochrane systematic literature reviews (SLRs) have reported that topical treatments for dry mouth and dry eye are safe and effective. Ocular cyclosporine A was safe and effective in two RCTs including 1039 patients with dry eye syndrome. Two Cochrane SLRs on serum tear drops and plugs showed inconsistency in possible benefits, both for symptoms and objective measures. Five RCTs reported significant improvements in oral dryness and salivary flow rates for pilocarpine and cevimeline. An RCT showed no significant placebo-differences for hydroxychloroquine 400 mg/day for the primary outcome (visual analogue scale (VAS) composite of dryness, fatigue and pain). We identified seven RCTs carried out in primary SjS patients. RCTs using infliximab, anakinra and baminercept found no placebo-differences for the primary outcomes. The two largest RCTs randomised 255 patients to receive rituximab or placebo and reported no significant results in the primary outcome (VAS composite), while prospective studies suggested efficacy in systemic disease. Conclusion The current evidence supporting the use of the main topical therapeutic options of primary SjS is solid, while limited data from RCTs are available to guide systemic therapies.
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Affiliation(s)
- Pilar Brito-Zerón
- Autoimmune Diseases Unit, Department of Medicine, Hospital CIMA-Sanitas, Barcelona, Spain
- Laboratory of Autoimmune Diseases Josep Font, CELLEX, IDIBAPS, Barcelona, Spain
| | - Soledad Retamozo
- Department of Rheumatology, Instituto Modelo de Cariología Privado S.R.L, Instituto Universitario de Ciencias Biomédicas de Córdoba, Cordoba, Argentina
- Instituto De Investigaciones En Ciencias De La Salud (INICSA), Universidad Nacional de Córdoba (UNC), Cordoba, Argentina
| | - Belchin Kostov
- Research Primary Healthcare Transversal Research Group, CAP Les Corts, CAPSBE, IDIBAPS, Barcelona, Spain
- Statistics and Operations Research Department, Universitat Politecnica de Catalunya, Barcelona, Spain
| | - Chiara Baldini
- Rheumatology Unit, Universita degli Studi di Pisa, Pisa, Italy
| | - Hendrika Bootsma
- Department of Rheumatology and Clinical Immunology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Salvatore De Vita
- Clinic of Rheumatology, University Hospital Santa Maria della Misericordia, Udine, Italy
| | - Thomas Dörner
- Department of Medicine/Rheumatology and Clinical Immunology and DRFZ, Charité Universitätsmedizin Berlin Campus Charite Mitte, Berlin, Germany
| | - Jacques-Eric Gottenberg
- Department of Rheumatology, Strasbourg University Hospital, National Reference Center for Rare Systemic Autoimmune Diseases, CNRS, IBMC, UPR 3572, Université de Strasbourg, Strasbourg, France
| | - Aike A. Kruize
- Department of Rheumatology and Clinical Immunology, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Thomas Mandl
- Department of Rheumatology, Skane University Hospital Malmö, Lund University, Lund, Sweden
| | - Wan-Fai Ng
- NIHR Newcastle Biomedical Research Centre, Newcastle upon Tyne NHS Foundation Trust, Newcastle upon Tyne, UK
| | - Raphaele Seror
- Department of Rheumatology, Assistance Publique – Hôpitaux de Paris, Hôpitaux Universitaires Paris-Sud, Le Kremlin-Bicêtre, Le Kremlin-Bicetre, France
- Center for Immunology of Viral Infections and Autoimmune Diseases, INSERM UMR 1184, Université Paris-Sud, Université Paris-Saclay, Paris, France
| | - Athanasios G. Tzioufas
- Department of Pathophysiology, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece
| | | | - Simon Bowman
- Department of Rheumatology, University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK
| | - Xavier Mariette
- Department of Rheumatology, Assistance Publique – Hôpitaux de Paris, Hôpitaux Universitaires Paris-Sud, Le Kremlin-Bicêtre, Le Kremlin-Bicetre, France
- Center for Immunology of Viral Infections and Autoimmune Diseases, INSERM UMR 1184, Université Paris-Sud, Université Paris-Saclay, Paris, France
| | - Manuel Ramos-Casals
- Laboratory of Autoimmune Diseases Josep Font, CELLEX, IDIBAPS, Barcelona, Spain
- Department of Autoimmune Diseases, ICMiD, Hospital Clinic de Barcelona, Barcelona, Spain
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10
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Miyamoto ST, Valim V, Fisher BA. Health-related quality of life and costs in Sjögren's syndrome. Rheumatology (Oxford) 2019; 60:2588-2601. [PMID: 30770918 DOI: 10.1093/rheumatology/key370] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Revised: 10/13/2018] [Indexed: 02/06/2023] Open
Abstract
Health-related quality of life (HRQoL) has an increasing role in medical decision-making. This review of the literature aims to provide an overview on HRQoL, costs, and work disability in SS, a disease characterized by focal lymphocytic infiltration of exocrine glands with no therapeutics of proven immunomodulatory potential. HRQoL is markedly reduced in SS in multiple studies across many countries when compared with HRQoL in healthy controls. The reduction in HRQoL is similar to that observed in other chronic diseases such as RA, SLE, FM and, interestingly, non-SS sicca syndrome. Impaired HRQoL in SS has been found to be associated with fatigue, pain/articular involvement, ocular and oral involvement, pruritus, sexual dysfunction, impaired sleep, pulmonary manifestations, psychological dysfunction and impaired physical function. Until now, no therapeutic has been shown to improve HRQoL in an adequately powered double-blind, placebo-controlled randomized controlled trial. Although primary SS does not, in general, impair life expectancy and is often inappropriately considered a benign 'nuisanvce' disease for those patients without systemic manifestations, the associated costs and work disability are striking. This, together with the significant reduction in HRQoL, strongly argues for the development of new therapeutic approaches to manage this neglected disease.
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Affiliation(s)
- Samira T Miyamoto
- Department of Integrated Education in Health, Universidade Federal do Espírito Santo, Vitória, Brazil
| | - Valéria Valim
- Department of Medical Clinic, Universidade Federal do Espírito Santo, Vitória, Brazil
| | - Benjamin A Fisher
- National Institute for Health Research (NIHR) Birmingham Biomedical Research Centre, University of Birmingham, Birmingham, UK.,Rheumatology Research Group, Institute of Inflammation and Ageing, University of Birmingham, Birmingham, UK.,Rheumatology Department, University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK
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11
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Chen X, Wu H, Wei W. Advances in the diagnosis and treatment of Sjogren's syndrome. Clin Rheumatol 2018; 37:1743-1749. [PMID: 29804149 DOI: 10.1007/s10067-018-4153-8] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2018] [Revised: 05/10/2018] [Accepted: 05/15/2018] [Indexed: 12/15/2022]
Abstract
Sjogren's syndrome (SS) is a systemic autoimmune disease that primarily affects the exocrine glands, resulting in dryness of the eyes and mouth due to lymphocytic infiltration of the salivary and lacrimal glands along with arthritis, kidney, liver, and lung involvement, chronic fatigue, musculoskeletal pain, vasculitis, and so on. Considerable advance has been made for the classification and treatment of primary SS in the past few years. This article reviews the recent classification criteria for primary SS and briefly discusses the conventional and novel therapies of the disease.
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Affiliation(s)
- Xiaoyun Chen
- Institute of Clinical Pharmacology, Anhui Medical University, Hefei,, 230032, Anhui, China.,Key Laboratory of Anti-inflammatory and Immune Medicine, Ministry of Education, Hefei, 230032, Anhui, China.,Anhui Collaborative Innovation Center of Anti-inflammatory and Immune Medicine, Hefei, 230032, Anhui, China
| | - Huaxun Wu
- Institute of Clinical Pharmacology, Anhui Medical University, Hefei,, 230032, Anhui, China. .,Key Laboratory of Anti-inflammatory and Immune Medicine, Ministry of Education, Hefei, 230032, Anhui, China. .,Anhui Collaborative Innovation Center of Anti-inflammatory and Immune Medicine, Hefei, 230032, Anhui, China.
| | - Wei Wei
- Institute of Clinical Pharmacology, Anhui Medical University, Hefei,, 230032, Anhui, China. .,Key Laboratory of Anti-inflammatory and Immune Medicine, Ministry of Education, Hefei, 230032, Anhui, China. .,Anhui Collaborative Innovation Center of Anti-inflammatory and Immune Medicine, Hefei, 230032, Anhui, China.
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12
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Demarchi J, Papasidero S, Medina MA, Klajn D, Chaparro Del Moral R, Rillo O, Martiré V, Crespo G, Secco A, Catalan Pellet A, Amitrano C, Crow C, Asnal C, Pucci P, Caeiro F, Benzanquen N, Pirola JP, Mayer M, Zazzetti F, Velez S, Barreira J, Tamborenea N, Santiago L, Raiti L. Primary Sjögren's syndrome: Extraglandular manifestations and hydroxychloroquine therapy. Clin Rheumatol 2017; 36:2455-2460. [PMID: 28913747 DOI: 10.1007/s10067-017-3822-3] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Revised: 08/29/2017] [Accepted: 09/04/2017] [Indexed: 12/25/2022]
Abstract
The use of hydroxychloroquine (HCQ) in Primary Sjögren's Syndrome (pSS) has been assessed in different studies over the last years, with conflicting results regarding its efficacy in sicca syndrome and extraglandular manifestations (EGM). The goal of this study was to compare the incidence rate of EGM in pSS patients with and without HCQ therapy.We performed a multicenter retrospective study, including patients with pSS (European classification criteria) with at least 1 year of follow-up. Subjects with concomitant fibromyalgia, autoimmune hepatitis, primary biliary cirrhosis, and primary sclerosing cholangitis were excluded. Demographics and pSS characteristics were recorded. The EGM were defined by EULAR-SS disease activity index (ESSDAI). Patients were divided into two groups according to their use or not of HCQ therapy. We evaluated the use of HCQ and its relationship to EGM. HCQ therapy was defined as the continuous use of the drug for at least 3 months. A descriptive analysis of demographics and pSS characteristics was performed. We compared the incidence of EGM between groups defined by HCQ therapy using chi2 test or Fisher's exact test. A total of 221 patients were included (97.3% women), mean age, 55.7 years (SD 14). Mean age at diagnosis, 48.8 years (SD 15); median disease duration, 60 months (IQR 35-84). One hundred and seventy patients (77%) received HCQ. About half of the patients had at least one EGM during the course of the disease, 20% of them developed an EGM before the onset of the sicca syndrome and 26% simultaneously with dryness symptom. Overall, EGM were less frequent in those on HCQ therapy (36.5% vs 63.5%, p < 0.001). Considering each EGM individually, the following manifestations were more frequent in the non-treated group: arthritis (p < 0.001), fatigue (p < 0.001), purpura (p = 0.01), Raynaud phenomenon (p = 0.003), and hypergammaglobulinemia (p = 0.006). Immunosuppressive treatment was indicated on 28 patients (12.7%), 13 of which were receiving also HCQ. The first reason for those treatments was the presence of arthritis in 12/28 patients (42.8%), and the drug used in all the cases was methotrexate. Only three patients required immunosuppressive therapy with cyclophosphamide, due to the presence of glomerulonephritis, vasculitis, and interstitial lung disease. None of the patients received biologic therapy. The lower incidence of EGM was observed in patients on HCQ therapy supports its efficacy in pSS. However, further large scale prospective studies are needed to confirm these findings.
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Affiliation(s)
- J Demarchi
- Hospital General de Agudos Dr. E. Tornú, Buenos Aires, Argentina.
| | - S Papasidero
- Hospital General de Agudos Dr. E. Tornú, Buenos Aires, Argentina
| | - M A Medina
- Hospital General de Agudos Dr. E. Tornú, Buenos Aires, Argentina
| | - D Klajn
- Hospital General de Agudos Dr. E. Tornú, Buenos Aires, Argentina
| | | | - O Rillo
- Hospital General de Agudos Dr. E. Tornú, Buenos Aires, Argentina
| | - V Martiré
- Hospital B. Rivadavia, Buenos Aires, Argentina
| | - G Crespo
- Hospital B. Rivadavia, Buenos Aires, Argentina
| | - A Secco
- Hospital B. Rivadavia, Buenos Aires, Argentina
| | | | - C Amitrano
- Hospital Alemán, Buenos Aires, Argentina
| | - C Crow
- Hospital Alemán, Buenos Aires, Argentina
| | - C Asnal
- Hospital Alemán, Buenos Aires, Argentina
| | - P Pucci
- Hospital Alemán, Buenos Aires, Argentina
| | - F Caeiro
- Hospital Privado de Córdoba, Córdoba, Argentina
| | | | - J P Pirola
- Hospital Privado de Córdoba, Córdoba, Argentina
| | - M Mayer
- Hospital Británico de Buenos Aires, Buenos Aires, Argentina
| | - F Zazzetti
- Hospital Británico de Buenos Aires, Buenos Aires, Argentina
| | - S Velez
- Hospital Británico de Buenos Aires, Buenos Aires, Argentina
| | - J Barreira
- Hospital Británico de Buenos Aires, Buenos Aires, Argentina
| | - N Tamborenea
- Organización Médica de Investigación (OMI), Buenos Aires, Argentina
| | - L Santiago
- Organización Médica de Investigación (OMI), Buenos Aires, Argentina
| | - L Raiti
- Clínica Bessone, Buenos Aires, Argentina
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13
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Fidelix T, Czapkowski A, Azjen S, Andriolo A, Trevisani VFM. Salivary gland ultrasonography as a predictor of clinical activity in Sjögren's syndrome. PLoS One 2017; 12:e0182287. [PMID: 28783737 PMCID: PMC5544350 DOI: 10.1371/journal.pone.0182287] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Accepted: 07/14/2017] [Indexed: 11/18/2022] Open
Abstract
Purpose Primary Sjögren’s syndrome is a multisystem autoimmune disease characterized by hypofunction of salivary and lacrimal glands and possible multi-organ system manifestations. Over the past 15 years, three sets of diagnostic criteria have been proposed, but none has included salivary gland ultrasonography. However, recent studies support its role in the diagnosis and prognostic evaluation of patients with Sjögren’s syndrome. This study aimed to determine the value of salivary gland ultrasonography in the diagnosis and prognosis of Sjögren’s syndrome by relating ultrasonography severity scores to clinical and laboratory data. Methods Seventy patients who fulfilled the 2002 American-European Consensus Group diagnostic criteria for primary Sjögren’s syndrome were selected from 84 patients receiving care in specialized outpatient clinics at our institution from November 2013 to May 2016. Their serology, European League Against Rheumatism Sjögren’s syndrome disease activity index (ESSDAI), salivary flow rate, immunoglobulin G, and salivary and serum beta-2 microglobulin levels were measured. Salivary gland ultrasonography was performed by an experienced radiologist, using scores of 1–4 to classify salivary gland impairment. Results Salivary gland ultrasonography scores of 1 or 2 were associated with an ESSDAI < 5. Ultrasonography scores of 3 or 4 were associated with an ESSDAI ≥5 (p = 0.064), a positive antinuclear antibody test (p = 0.006), positive anti-Ro/SSA antibodies (p = 0.003), positive anti-La/SSB antibodies (p = 0.077), positive rheumatoid factor (p = 0.034), and immunoglobulin G levels > 1600 mg/dL (p = 0.077). Salivary flow rate was lower in patients with scores 3 or 4 (p = 0.001). Conclusion This study provides further evidence that salivary gland ultrasonography can be used not only for diagnosis but also for prognostic evaluation of primary Sjögren’s syndrome. These findings confirm what has been reported in the literature. However, further analyses involving larger matched samples are required to support this finding and include salivary gland ultrasonography as part of the diagnostic criteria for Sjögren’s syndrome.
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Affiliation(s)
- Tania Fidelix
- Department of Evidence-Based Medicine, Universidade Federal de São Paulo (UNIFESP), São Paulo, SP, Brazil
- * E-mail:
| | | | - Sergio Azjen
- Department of Radiology, UNIFESP, São Paulo, SP, Brazil
| | - Adagmar Andriolo
- Department of Laboratory Medicine, UNIFESP, São Paulo, SP, Brazil
| | - Virginia F. M. Trevisani
- Department of Evidence-Based Medicine, Universidade Federal de São Paulo (UNIFESP), São Paulo, SP, Brazil
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14
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Chu CS, Mok CC. Diagnosis and treatment of primary Sjogren’s syndrome: an update. HONG KONG BULLETIN ON RHEUMATIC DISEASES 2017. [DOI: 10.1515/hkbrd-2017-0006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
Primary Sjogren’s syndrome (SS) is a systemic autoimmune disease that primarily affects the exocrine glands, resulting in dryness of the mucosal membranes, particularly of the eyes and mouth. Considerable advance has been made for the classification and treatment of primary SS in the past few years. This article reviews the recent classification criteria for primary SS and briefly discusses the conventional and novel therapies of the disease.
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Affiliation(s)
- Chiu Sum Chu
- Department of Medicine , Tuen Mun Hospital , Hong Kong SAR , China
| | - Chi Chiu Mok
- Department of Medicine , Tuen Mun Hospital , Hong Kong SAR , China
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