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Teng JL, Chen X, Chen J, Zeng T, He L, Li M, Luo CN, Liu S, Ding TT, Yimaiti K, Li X, Ding Y, Cheng XB, Zhou J, Ye JN, Ji J, Su YT, Shi H, Sun Y, Gao C, Hu QY, Chi HH, Yuan X, Zhou ZC, Wang D, Wang K, Feng D, Li C, Sun Y, Niu Y, Xu X, Chen LJ, Xu J, Wu LJ, Zhou Z, Pan D, Niu H, Yang CD, Yongyong Shi, Li Z, Liu HL. The amino acid variants in HLA II molecules explain the major association with adult-onset Still's disease in the Han Chinese population. J Autoimmun 2020; 116:102562. [PMID: 33168359 DOI: 10.1016/j.jaut.2020.102562] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2020] [Revised: 10/27/2020] [Accepted: 10/27/2020] [Indexed: 10/23/2022]
Abstract
Adult-onset Still's disease (AOSD) is a rare autoinflammatory disease with systemic involvement, and its pathophysiology remains unclear. Genome-wide association studies (GWAS) in the Chinese population have revealed an association between AOSD and the major histocompatibility complex (MHC) locus; however, causal variants in the MHC remain undetermined. In the present study, we identified independent amino-acid polymorphisms in human leukocyte antigen (HLA) molecules that are associated with Han Chinese patients with AOSD by fine-mapping the MHC locus. Through conditional analyses, we identified position 34 in HLA-DQα1 (p = 1.44 × 10-14) and Asn in HLA-DRβ1 position 37 (p = 5.12 × 10-11) as the major determinants for AOSD. Moreover, we identified the associations for three main HLA class II alleles: HLA-DQB1*06:02 (OR = 2.70, p = 3.02 × 10-14), HLA-DRB1*15:01 (OR = 2.44, p = 3.66 × 10-13), and HLA-DQA1*01:02 (OR = 1.97, p = 1.09 × 10-9). This study reveals the relationship between functional variations in the class II HLA region and AOSD, implicating the MHC locus in the pathogenesis of AOSD.
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Affiliation(s)
- Jia-Lin Teng
- Department of Rheumatology and Immunology, Shanghai Jiao Tong University School of Medicine Affiliated Ruijin Hospital, Shanghai, China
| | - Xia Chen
- Department of Rheumatology and Immunology, Shanghai Jiao Tong University School of Medicine Affiliated Ruijin Hospital, Shanghai, China
| | - Jianhua Chen
- Bio-X Institutes, Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), The Collaborative Innovation Center for Brain Science, Shanghai Jiao Tong University, Shanghai, China; Shanghai Key Laboratory of Psychotic Disorders, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Ting Zeng
- Xinhua Hospital Chongming Branch Affiliated to Shanghai Jiao Tong University School of Medicine, China
| | - Lin He
- Bio-X Institutes, Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), The Collaborative Innovation Center for Brain Science, Shanghai Jiao Tong University, Shanghai, China; Institute of Social Cognitive and Behavioral Sciences, Shanghai Jiao Tong University, Shanghai, China
| | - Meihang Li
- The Affiliated Hospital of Qingdao University & the Biomedical Sciences Institute of Qingdao University (Qingdao Branch of SJTU Bio-X Institutes), Qingdao University, Qingdao, China
| | - Cai-Nan Luo
- Department of Rheumatology and Immunology, People's Hospital of Xinjiang Ugyur Autonomous Region, Urumqi, 830001, China
| | - Shuang Liu
- Department of Rheumatology and Immunology, First Affiliated Hospital of Kunming Medical University, Kunming, 650032, China
| | - Ting-Ting Ding
- Department of Rheumatology and Immunology, First Affiliated Hospital of Bengbu Medical College, 233000, China
| | - Kuerbanjiang Yimaiti
- Department of Rheumatology and Immunology, People's Hospital of Xinjiang Ugyur Autonomous Region, Urumqi, 830001, China
| | - Xingwang Li
- Bio-X Institutes, Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), The Collaborative Innovation Center for Brain Science, Shanghai Jiao Tong University, Shanghai, China
| | - Yonghe Ding
- The Affiliated Hospital of Qingdao University & the Biomedical Sciences Institute of Qingdao University (Qingdao Branch of SJTU Bio-X Institutes), Qingdao University, Qingdao, China
| | - Xiao-Bing Cheng
- Department of Rheumatology and Immunology, Shanghai Jiao Tong University School of Medicine Affiliated Ruijin Hospital, Shanghai, China
| | - Juan Zhou
- Bio-X Institutes, Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), The Collaborative Innovation Center for Brain Science, Shanghai Jiao Tong University, Shanghai, China
| | - Jun-Na Ye
- Department of Rheumatology and Immunology, Shanghai Jiao Tong University School of Medicine Affiliated Ruijin Hospital, Shanghai, China
| | - Jue Ji
- Bio-X Institutes, Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), The Collaborative Innovation Center for Brain Science, Shanghai Jiao Tong University, Shanghai, China
| | - Yu-Tong Su
- Department of Rheumatology and Immunology, Shanghai Jiao Tong University School of Medicine Affiliated Ruijin Hospital, Shanghai, China
| | - Hui Shi
- Department of Rheumatology and Immunology, Shanghai Jiao Tong University School of Medicine Affiliated Ruijin Hospital, Shanghai, China
| | - Yue Sun
- Department of Rheumatology and Immunology, Shanghai Jiao Tong University School of Medicine Affiliated Ruijin Hospital, Shanghai, China
| | - Chengwen Gao
- The Affiliated Hospital of Qingdao University & the Biomedical Sciences Institute of Qingdao University (Qingdao Branch of SJTU Bio-X Institutes), Qingdao University, Qingdao, China
| | - Qiong-Yi Hu
- Department of Rheumatology and Immunology, Shanghai Jiao Tong University School of Medicine Affiliated Ruijin Hospital, Shanghai, China
| | - Hui-Hui Chi
- Department of Rheumatology and Immunology, Shanghai Jiao Tong University School of Medicine Affiliated Ruijin Hospital, Shanghai, China
| | - Xuan Yuan
- The Affiliated Hospital of Qingdao University & the Biomedical Sciences Institute of Qingdao University (Qingdao Branch of SJTU Bio-X Institutes), Qingdao University, Qingdao, China
| | - Zhuo-Chao Zhou
- Department of Rheumatology and Immunology, Shanghai Jiao Tong University School of Medicine Affiliated Ruijin Hospital, Shanghai, China
| | - Dong Wang
- Bio-X Institutes, Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), The Collaborative Innovation Center for Brain Science, Shanghai Jiao Tong University, Shanghai, China
| | - Ke Wang
- Bio-X Institutes, Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), The Collaborative Innovation Center for Brain Science, Shanghai Jiao Tong University, Shanghai, China
| | - Dong Feng
- The Affiliated Hospital of Qingdao University & the Biomedical Sciences Institute of Qingdao University (Qingdao Branch of SJTU Bio-X Institutes), Qingdao University, Qingdao, China
| | - Changgui Li
- The Affiliated Hospital of Qingdao University & the Biomedical Sciences Institute of Qingdao University (Qingdao Branch of SJTU Bio-X Institutes), Qingdao University, Qingdao, China
| | - Yuanchao Sun
- The Affiliated Hospital of Qingdao University & the Biomedical Sciences Institute of Qingdao University (Qingdao Branch of SJTU Bio-X Institutes), Qingdao University, Qingdao, China
| | - Yujuan Niu
- The Affiliated Hospital of Qingdao University & the Biomedical Sciences Institute of Qingdao University (Qingdao Branch of SJTU Bio-X Institutes), Qingdao University, Qingdao, China
| | - Xiaolei Xu
- The Affiliated Hospital of Qingdao University & the Biomedical Sciences Institute of Qingdao University (Qingdao Branch of SJTU Bio-X Institutes), Qingdao University, Qingdao, China
| | - Lin-Jie Chen
- Department of Rheumatology and Immunology, First Affiliated Hospital of Bengbu Medical College, 233000, China
| | - Jian Xu
- Department of Rheumatology and Immunology, First Affiliated Hospital of Kunming Medical University, Kunming, 650032, China
| | - Li-Jun Wu
- Department of Rheumatology and Immunology, People's Hospital of Xinjiang Ugyur Autonomous Region, Urumqi, 830001, China
| | - Zhaowei Zhou
- Bio-X Institutes, Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), The Collaborative Innovation Center for Brain Science, Shanghai Jiao Tong University, Shanghai, China
| | - Dun Pan
- Bio-X Institutes, Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), The Collaborative Innovation Center for Brain Science, Shanghai Jiao Tong University, Shanghai, China
| | - Haitao Niu
- The Affiliated Hospital of Qingdao University & the Biomedical Sciences Institute of Qingdao University (Qingdao Branch of SJTU Bio-X Institutes), Qingdao University, Qingdao, China; Department of Urology, The Affiliated Hospital of Qingdao University, Qingdao, China; Key Laboratory, Department of Urology and Andrology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Cheng-de Yang
- Department of Rheumatology and Immunology, Shanghai Jiao Tong University School of Medicine Affiliated Ruijin Hospital, Shanghai, China
| | - Yongyong Shi
- The Affiliated Hospital of Qingdao University & the Biomedical Sciences Institute of Qingdao University (Qingdao Branch of SJTU Bio-X Institutes), Qingdao University, Qingdao, China; Bio-X Institutes, Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), The Collaborative Innovation Center for Brain Science, Shanghai Jiao Tong University, Shanghai, China; Institute of Social Cognitive and Behavioral Sciences, Shanghai Jiao Tong University, Shanghai, China; Institute of Neuropsychiatric Science and Systems Biological Medicine, Shanghai Jiao Tong University, Shanghai, China; Shanghai Key Laboratory of Psychotic Disorders, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China; Department of Psychiatry, The First Teaching Hospital of Xinjiang Medical University, Urumqi, China; Changning Mental Health Center, Shanghai, China
| | - Zhiqiang Li
- The Affiliated Hospital of Qingdao University & the Biomedical Sciences Institute of Qingdao University (Qingdao Branch of SJTU Bio-X Institutes), Qingdao University, Qingdao, China; Bio-X Institutes, Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), The Collaborative Innovation Center for Brain Science, Shanghai Jiao Tong University, Shanghai, China; Institute of Social Cognitive and Behavioral Sciences, Shanghai Jiao Tong University, Shanghai, China; Institute of Neuropsychiatric Science and Systems Biological Medicine, Shanghai Jiao Tong University, Shanghai, China.
| | - Hong-Lei Liu
- Department of Rheumatology and Immunology, Shanghai Jiao Tong University School of Medicine Affiliated Ruijin Hospital, Shanghai, China.
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Wan LY, Gu JY, Liu TT, Hu QY, Jia JC, Teng JL, Sun Y, Liu HL, Cheng XB, Ye JN, Su YT, Wu XY, Chi HH, Zhou ZC, Wang ZH, Zhou JF, Norman GL, Dai J, Yang CD, Shi H. Clinical performance of automated chemiluminescent methods for anticardiolipin and anti-β2-glycoprotein I antibodies detection in a large cohort of Chinese patients with antiphospholipid syndrome. Int J Lab Hematol 2020; 42:206-213. [PMID: 31958215 DOI: 10.1111/ijlh.13156] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Revised: 12/24/2019] [Accepted: 12/28/2019] [Indexed: 11/26/2022]
Abstract
INTRODUCTION To assess the clinical performance and correlations of automated chemiluminescence assay (CIA) and enzyme-linked immunosorbent assay (ELISA) for detecting antiphospholipid (aPL) antibodies in the diagnosis of antiphospholipid syndrome (APS). METHODS The study recruited 505 subjects, including 192 with APS, 193 with connective tissue diseases other than APS, and 120 healthy donors. We measured anticardiolipin (aCL) and anti-β2-glycoprotein I (anti-β2GPI) antibodies IgG, IgM, and IgA in all the samples using both CIA and ELISA. RESULTS Total agreement between the two methods ranged from 83.50% for anti-β2GPI IgG antibodies to 92.76% for anti-β2GPI IgM antibodies in all the groups. Anti-β2GPI and aCL IgG assays showed the highest Spearman's rho coefficients (anti-β2GPI IgG = 0.742, aCL IgG = 0.715). Anti-β2GPI IgG CIA showed the highest sensitivity for diagnosis of APS at 80.21%, which was significantly higher than the sensitivity of anti-β2GPI IgG ELISA (52.08%). For diagnosis of APS, anti-β2GPI IgG CIA had the best discrimination power with the area under the curves (AUC) of 0.922, followed by aCL IgG CIA (AUC of 0.905). While the CIA AUC was slightly higher in all cases, the difference was not statistically significant. CONCLUSION CIA measurements had a good agreement and correlation with comparative ELISA assays. The CIA anti-β2GPI IgG however was significantly more sensitive for APS diagnosis. The two assay methodologies showed comparable predictive powers and support the value of the CIA method for improved diagnosis and management of patients with APS.
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Affiliation(s)
- Li-Yan Wan
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jie-Yu Gu
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Ting-Ting Liu
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Qiong-Yi Hu
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jin-Chao Jia
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jia-Lin Teng
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yue Sun
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Hong-Lei Liu
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xiao-Bing Cheng
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jun-Na Ye
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yu-Tong Su
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xin-Yao Wu
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Hui-Hui Chi
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Zhuo-Chao Zhou
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Zhi-Hong Wang
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | | | | | - Jing Dai
- Laboratory Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Cheng-de Yang
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Hui Shi
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
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3
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Hu QY, Zeng T, Sun CY, Luo CN, Liu S, Ding TT, Ji ZF, Lu A, Yimaiti K, Teng JL, Cheng XB, Ye JN, Su YT, Shi H, Sun Y, Chi HH, Zhou ZC, Chen LJ, Xu J, Jiang LD, Wu LJ, Lin J, Yang CD, Liu HL. Clinical features and current treatments of adult-onset Still's disease: a multicentre survey of 517 patients in China. Clin Exp Rheumatol 2019; 37 Suppl 121:52-57. [PMID: 31573475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2018] [Accepted: 03/25/2019] [Indexed: 06/10/2023]
Abstract
OBJECTIVES As a rare systemic autoinflammatory disease, adult-onset Still's disease (AOSD) has heterogeneous clinical manifestations, response to treatment and outcome. This study tried to assess the clinical characteristics, laboratory tests, and treatments of Chinese AOSD patients, and make a retrospective analysis. METHODS We collected from 7 hospitals in China a total of 517 Chinese patients with AOSD who satisfied the Yamaguchi criteria. We retrospectively evaluated their clinical features, laboratory tests, treatments and compared them with published data from different studies. All the data in this study were from medical records and further statistic analyses. RESULTS We evaluated a total of 517 AOSD patients, 72% female, average age of onset was 37.7; spiking fever, rash and arthralgia occurred in 472 (91.3%), 413 (79.9%), 378 (73.1%) cases, respectively. There were 439/513 (85.6%) cases with leukocytosis and 456/476 (95.8%) cases with raised serum ferritin. The highest frequently used medications and regimens for remission were glucocorticoids (498/517, 96.3%), methotrexate (273/517, 52.8%) and hydroxychloroquine (174/517, 33.7%). 84.4%. 357/423 of AOSD cases were able to achieve initial remission with different regimens, mostly including glucocorticoids, methotrexate or hydroxychloroquine. 47.2% of them (244/517) received 30<D≤60 mg/d of prednisone to reach final clinical remission. Further analysis indicated that risk factors, such as skin rash, pericarditis, splenomegaly and delayed diagnosis, are highly related to the dosage of prednisone for remission. CONCLUSIONS Glucocorticoids are mostly selected to induce remission in China and half of them required ~0.5-1mg/kgbw prednisone. In patients with skin rash, pericarditis, splenomegaly or delayed diagnosis, a higher dosage of prednisone was needed to obtain remission.
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Affiliation(s)
- Qiong-Yi Hu
- Department of Rheumatology and Immunology, Shanghai Jiao Tong University School of Medicine Affiliated Ruijin Hospital, Shanghai, China
| | - Ting Zeng
- Xinhua Hospital Chongming Branch Affiliated to Shanghai JiaoTong University School of Medicine, Shanghai, China
| | - Chuan-Yin Sun
- Department of Rheumatology, First Affiliated Hospital of the Medical School, Zhejiang University, Hangzhou, China
| | - Cai-Nan Luo
- Department of Rheumatology and Immunology, People's Hospital of Xinjiang Ugyur Autonomous Region, Urumqi, China
| | - Shuang Liu
- Department of Rheumatology and Immunology, First Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Ting-Ting Ding
- Department of Rheumatology and Immunology, First Affiliated Hospital of Bengbu Medical College, China
| | - Zong-Fei Ji
- Department of Rheumatology, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Anxin Lu
- Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Kuerbanjiang Yimaiti
- Department of Rheumatology and Immunology, People's Hospital of Xinjiang Ugyur Autonomous Region, Urumqi, China
| | - Jia-Lin Teng
- Department of Rheumatology and Immunology, Shanghai Jiao Tong University School of Medicine Affiliated Ruijin Hospital, Shanghai, China
| | - Xiao-Bing Cheng
- Department of Rheumatology and Immunology, Shanghai Jiao Tong University School of Medicine Affiliated Ruijin Hospital, Shanghai, China
| | - Jun-Na Ye
- Department of Rheumatology and Immunology, Shanghai Jiao Tong University School of Medicine Affiliated Ruijin Hospital, Shanghai, China
| | - Yu-Tong Su
- Department of Rheumatology and Immunology, Shanghai Jiao Tong University School of Medicine Affiliated Ruijin Hospital, Shanghai, China
| | - Hui Shi
- Department of Rheumatology and Immunology, Shanghai Jiao Tong University School of Medicine Affiliated Ruijin Hospital, Shanghai, China
| | - Yue Sun
- Department of Rheumatology and Immunology, Shanghai Jiao Tong University School of Medicine Affiliated Ruijin Hospital, Shanghai, China
| | - Hui-Hui Chi
- Department of Rheumatology and Immunology, Shanghai Jiao Tong University School of Medicine Affiliated Ruijin Hospital, Shanghai, China
| | - Zhuo-Chao Zhou
- Department of Rheumatology and Immunology, Shanghai Jiao Tong University School of Medicine Affiliated Ruijin Hospital, Shanghai, China
| | - Lin-Jie Chen
- Department of Rheumatology and Immunology, First Affiliated Hospital of Bengbu Medical College, China
| | - Jian Xu
- Department of Rheumatology and Immunology, First Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Lin-Di Jiang
- Department of Rheumatology, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Li-Jun Wu
- Department of Rheumatology and Immunology, People's Hospital of Xinjiang Ugyur Autonomous Region, Urumqi, China
| | - Jin Lin
- Department of Rheumatology, First Affiliated Hospital of the Medical School, Zhejiang University, Hangzhou, China
| | - Cheng-De Yang
- Department of Rheumatology and Immunology, Shanghai Jiao Tong University School of Medicine Affiliated Ruijin Hospital, Shanghai, China.
| | - Hong-Lei Liu
- Department of Rheumatology and Immunology, Shanghai Jiao Tong University School of Medicine Affiliated Ruijin Hospital, Shanghai, China.
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Qiao X, Zhou ZC, Niu R, Su YT, Sun Y, Liu HL, Teng JL, Ye JN, Shi H, Yang CD, Cheng XB. Hydroxychloroquine Improves Obesity-Associated Insulin Resistance and Hepatic Steatosis by Regulating Lipid Metabolism. Front Pharmacol 2019; 10:855. [PMID: 31427967 PMCID: PMC6689966 DOI: 10.3389/fphar.2019.00855] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Accepted: 07/04/2019] [Indexed: 01/03/2023] Open
Abstract
The burden of obesity and associated cardiometabolic diseases has been considered as an important risk factor for lupus patients. Therefore, whether obesity is involved in the over-activation of autoimmune response has attracted more and more attention. Hydroxychloroquine is a synthetic antimalarial drug and has been the clinical treatment of rheumatic diseases irreplaceable first-line drugs. Hydroxychloroquine has been suggested to have beneficial effects on lipids and insulin sensitivity, which may contribute in lowering high cardiovascular risk in SLE patients. However, its mechanism on insulin sensitivity and lipid disorders is far from being completely understood. In the present study, the therapeutic effects of hydroxychloroquine were evaluated under pathological conditions in vivo. Obesity was induced in C57BL/6 mice fed with high-fed diet, or in mice fed with high-fat diet and hydroxychloroquine. In addition, healthy mice that received normal chow diet were also monitored. The present results revealed that hydroxychloroquine reduced weight, hepatic steatosis, glucose, and insulin resistance. Furthermore, hydroxychloroquine downregulated the expression of peroxisome proliferator-activated receptor gamma in the liver. According to these present results, genes about lipid metabolism went down in high-fat mice liver. Hydroxychloroquine shows potential in ameliorating obesity-induced pathology, which acts though PPARγ to facilitate the healthy function of hepatic tissues. This evidence shows that hydroxychloroquine plays a role in improving obesity-induced lipotoxicity and insulin resistance though the peroxisome proliferator-activated receptor gamma pathway.
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Affiliation(s)
- Xin Qiao
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Zhuo-Chao Zhou
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Rui Niu
- Shanghai Pharmaceutical Medicine, Shanghai, China
| | - Yu-Tong Su
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yue Sun
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Hong-Lei Liu
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jia-Lin Teng
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jun-Na Ye
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Hui Shi
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Cheng-De Yang
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xiao-Bing Cheng
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
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5
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Shi H, Zheng H, Yin YF, Hu QY, Teng JL, Sun Y, Liu HL, Cheng XB, Ye JN, Su YT, Wu XY, Zhou JF, Norman GL, Gong HY, Shi XM, Peng YB, Wang XF, Yang CD. Antiphosphatidylserine/prothrombin antibodies (aPS/PT) as potential diagnostic markers and risk predictors of venous thrombosis and obstetric complications in antiphospholipid syndrome. Clin Chem Lab Med 2018; 56:614-624. [PMID: 29166262 DOI: 10.1515/cclm-2017-0502] [Citation(s) in RCA: 66] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Accepted: 09/18/2017] [Indexed: 11/15/2022]
Abstract
BACKGROUND The aim of the study was to determine the prevalence and clinical associations of antiphosphatidylserine/prothrombin antibodies (aPS/PT) with thrombosis and pregnancy loss in Chinese patients with antiphospholipid syndrome (APS) and seronegative APS (SNAPS). METHODS One hundred and eighty six Chinese patients with APS (67 primary, 119 secondary), 48 with SNAPS, 176 disease controls (79 systemic lupus erythematosus [SLE], 29 Sjogren's syndrome [SS], 30 ankylosing spondylitis [AS], 38 rheumatoid arthritis [RA]) and 90 healthy donors were examined. IgG and IgM aPS/PT, IgG/IgM/IgA anticardiolipin (aCL) and IgG/IgM/IgA anti-β2-glycoprotein I (anti-β2GPI) antibodies were tested by ELISA. RESULTS One hundred and sixty (86.0%) of APS patients were positive for at least one aPS/PT isotype. One hundred and thirty five (72.6%) were positive for IgG aPS/PT, 124/186 (66.7%) positive for IgM aPS/PT and 99 (53.2%) positive for both. Approximately half of the SNAPS patients were positive for IgG and/or IgM aPS/PT. Highly significant associations between IgG aPS/PT and venous thrombotic events (odds ratio [OR]=6.72) and IgG/IgM aPS/PT and pregnancy loss (OR=9.44) were found. Levels of IgM aPS/PT were significantly different in APS patients with thrombotic manifestations and those with fetal loss (p=0.014). The association between IgG/IgM aPS/PT and lupus anticoagulant (LAC) was highly significant (p<0.001). When both were positive, the OR for APS was 101.6. Notably, 91.95% (80/87) of LAC-positive specimens were positive for IgG and/or IgM aPS/PT, suggesting aPS/PT is an effective option when LAC testing is not available. CONCLUSIONS Anti-PS/PT antibody assays demonstrated high diagnostic performance for Chinese patients with APS, detected some APS patients negative for criteria markers and may serve as potential risk predictors for venous thrombosis and obstetric complications.
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Affiliation(s)
- Hui Shi
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, P.R. China
| | - Hui Zheng
- Department of Rheumatology and Immunology, Affiliated Hospital of Taishan Medical University, Shandong, P.R. China
| | - Yu-Feng Yin
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, P.R. China
| | - Qiong-Yi Hu
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, P.R. China
| | - Jia-Lin Teng
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, P.R. China
| | - Yue Sun
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, P.R. China
| | - Hong-Lei Liu
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, P.R. China
| | - Xiao-Bing Cheng
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, P.R. China
| | - Jun-Na Ye
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, P.R. China
| | - Yu-Tong Su
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, P.R. China
| | - Xin-Yao Wu
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, P.R. China
| | - Jin-Feng Zhou
- Werfen Medical Device Trading (Beijing) Co. Ltd., Beijing, P.R. China
| | | | - Hui-Yun Gong
- Department of Laboratory Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, P.R. China
| | - Xin-Ming Shi
- Department of Laboratory Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, P.R. China
| | - Yi-Bing Peng
- Department of Laboratory Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, P.R. China
| | - Xue-Feng Wang
- Department of Laboratory Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, No. 197 Ruijin Second Road, Huangpu District, Shanghai 200025, P.R. China, Phone: +86 21 54667770, Fax: +86 21 64333548
| | - Cheng-De Yang
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, No. 197 Ruijin Second Road, Huangpu District, Shanghai 200025, P.R. China, Phone: +86 21 64370045, Fax: +86 21 34186000
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Wu XY, Yang M, Xie YS, Xiao WG, Lin J, Zhou B, Guan X, Luo CN, Che N, Liu XZ, Wang C, Teng JL, Cheng XB, Ye JN, Su YT, Shi H, Yin YF, Liu MR, Sun Y, Hu QY, Zhou ZC, Chi HH, Liu Y, Zhang X, Chen JW, Zhang MJ, Zhao DB, Yang CD, Wu LJ, Liu HL. Causes of death in hospitalized patients with systemic lupus erythematosus: a 10-year multicenter nationwide Chinese cohort. Clin Rheumatol 2018; 38:107-115. [PMID: 30123930 DOI: 10.1007/s10067-018-4259-z] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Revised: 05/28/2018] [Accepted: 08/08/2018] [Indexed: 02/05/2023]
Abstract
To estimate the mortality and describe the causes of death in a large multicenter cohort of hospitalized patients with SLE in China. This was a retrospective study of a nationwide SLE cohort (10 centers, 29,510 hospitalized patients) from 2005 to 2014 in China. Standardized mortality ratios (SMRs) were calculated for all death and were stratified by sex and age. Chi-square test was used to determine whether the major causes of death vary in age, sex, duration of SLE, disease activity, or medications. Comparison between dead patients and survival controls was used to identify the risk factors for mortality. Logistic regression analysis was used to evaluate the risk factors for mortality. A total of 360 patients died during the study period, accounting for 1.22%. The overall SMR was 2.13 (95% CI 1.96, 2.30), with a particularly high SMR seen in subgroups characterized by younger age. Infection (65.8%) was the most common cause of death, followed by lupus nephritis (48.6%), hematological abnormality (18.1%), neuropsychiatric lupus/NPSLE (15.8%), and interstitial pneumonia (13.1%). Cardiovascular disease and malignancy contributed little to the causes of death. Infection, in particular severe pulmonary infection, emerged as the foremost risk factor for mortality, followed by lupus encephalopathy. However, lupus nephritis and hematological abnormalities occurred more frequently in survival patients. SLE patients at a younger age of diagnosis have a poorer prognosis. Infection dominated the causes of death in recent China. Ethnicity and medications might account for the differences in causes of death compared with western populations.
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Affiliation(s)
- Xin-Yao Wu
- Department of Rheumatology and Immunology, Shanghai Jiao Tong University School of Medicine Affiliated Ruijin Hospital, No. 197 Ruijin Second Road, Huangpu District, Shanghai, 200025, China
| | - Min Yang
- Department of Rheumatology and Immunology, Sichuan University West China Hospital, Chengdu, China
| | - Yue-Sheng Xie
- Department of Rheumatology and Immunology, Guangdong General Hospital, Guangzhou, China
| | - Wei-Guo Xiao
- Department of Rheumatology and Immunology, The First Hospital Affiliated to China Medical University, Shenyang, China
| | - Jin Lin
- Department of Rheumatology and Immunology, Zhejiang University School of Medicine First Affiliated Hospital, Hangzhou, China
| | - Bin Zhou
- Department of Rheumatology and Immunology, Sichuan People's Hospital, Chengdu, China
| | - Xin Guan
- Department of Rheumatology and Immunology, Second Xiangya Hospital, Changsha, China
| | - Cai-Nan Luo
- Department of Rheumatology and Immunology, Xinjiang Uygur People's Hospital, No. 91 Tianchi Road, Tianshan District, Urumqi, 830001, Xinjiang Uygur Autonomous Region, China
| | - Nan Che
- Department of Rheumatology and Immunology, Jiangsu People's Hospital, Nanjing, China
| | - Xing-Zhen Liu
- Department of Rheumatology and Immunology, Changhai Hospital, Shanghai, China
| | - Chao Wang
- Beijing Institute of Traumatology and Orthopaedics, Beijing Jishuitan Hospital, Fourth Clinical Medical College, Peking University, Beijing, China
| | - Jia-Lin Teng
- Department of Rheumatology and Immunology, Shanghai Jiao Tong University School of Medicine Affiliated Ruijin Hospital, No. 197 Ruijin Second Road, Huangpu District, Shanghai, 200025, China
| | - Xiao-Bing Cheng
- Department of Rheumatology and Immunology, Shanghai Jiao Tong University School of Medicine Affiliated Ruijin Hospital, No. 197 Ruijin Second Road, Huangpu District, Shanghai, 200025, China
| | - Jun-Na Ye
- Department of Rheumatology and Immunology, Shanghai Jiao Tong University School of Medicine Affiliated Ruijin Hospital, No. 197 Ruijin Second Road, Huangpu District, Shanghai, 200025, China
| | - Yu-Tong Su
- Department of Rheumatology and Immunology, Shanghai Jiao Tong University School of Medicine Affiliated Ruijin Hospital, No. 197 Ruijin Second Road, Huangpu District, Shanghai, 200025, China
| | - Hui Shi
- Department of Rheumatology and Immunology, Shanghai Jiao Tong University School of Medicine Affiliated Ruijin Hospital, No. 197 Ruijin Second Road, Huangpu District, Shanghai, 200025, China
| | - Yu-Feng Yin
- Department of Rheumatology and Immunology, Shanghai Jiao Tong University School of Medicine Affiliated Ruijin Hospital, No. 197 Ruijin Second Road, Huangpu District, Shanghai, 200025, China
| | - Meng-Ru Liu
- Department of Rheumatology and Immunology, Shanghai Jiao Tong University School of Medicine Affiliated Ruijin Hospital, No. 197 Ruijin Second Road, Huangpu District, Shanghai, 200025, China
| | - Yue Sun
- Department of Rheumatology and Immunology, Shanghai Jiao Tong University School of Medicine Affiliated Ruijin Hospital, No. 197 Ruijin Second Road, Huangpu District, Shanghai, 200025, China
| | - Qiong-Yi Hu
- Department of Rheumatology and Immunology, Shanghai Jiao Tong University School of Medicine Affiliated Ruijin Hospital, No. 197 Ruijin Second Road, Huangpu District, Shanghai, 200025, China
| | - Zhuo-Chao Zhou
- Department of Rheumatology and Immunology, Shanghai Jiao Tong University School of Medicine Affiliated Ruijin Hospital, No. 197 Ruijin Second Road, Huangpu District, Shanghai, 200025, China
| | - Hui-Hui Chi
- Department of Rheumatology and Immunology, Shanghai Jiao Tong University School of Medicine Affiliated Ruijin Hospital, No. 197 Ruijin Second Road, Huangpu District, Shanghai, 200025, China
| | - Yi Liu
- Department of Rheumatology and Immunology, Sichuan University West China Hospital, Chengdu, China
| | - Xiao Zhang
- Department of Rheumatology and Immunology, Guangdong General Hospital, Guangzhou, China
| | - Jin-Wei Chen
- Department of Rheumatology and Immunology, Second Xiangya Hospital, Changsha, China
| | - Miao-Jia Zhang
- Department of Rheumatology and Immunology, Jiangsu People's Hospital, Nanjing, China
| | - Dong-Bao Zhao
- Department of Rheumatology and Immunology, Changhai Hospital, Shanghai, China
| | - Cheng-de Yang
- Department of Rheumatology and Immunology, Shanghai Jiao Tong University School of Medicine Affiliated Ruijin Hospital, No. 197 Ruijin Second Road, Huangpu District, Shanghai, 200025, China.
| | - Li-Jun Wu
- Department of Rheumatology and Immunology, Xinjiang Uygur People's Hospital, No. 91 Tianchi Road, Tianshan District, Urumqi, 830001, Xinjiang Uygur Autonomous Region, China.
| | - Hong-Lei Liu
- Department of Rheumatology and Immunology, Shanghai Jiao Tong University School of Medicine Affiliated Ruijin Hospital, No. 197 Ruijin Second Road, Huangpu District, Shanghai, 200025, China.
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Abstract
Background The monoclonal gammopathies are a group of plasma-cell proliferative disorders characterized by the secretion of monoclonal immunoglobulin (M protein or paraprotein). Some rare cases have revealed the specific affinity of paraprotein as autoantibody. Here we report a patient with monoclonal gammopathy of undetermined significance (MGUS) accompanied by a remarkable increase of anticardiolipin antibody (aCL) and an extensively decreased coagulation factor activity, however, without any clinical signs of antiphospholipid syndrome (APS) and bleeding. Results Our further investigation indicated that IgMκ paraprotein of this patient possessed an antibody activity against phospholipids so as to bind to cardiolipin and interfere with coagulation assay in vitro. Conclusions This case might be indicative that an abnormality of coagulation tests, disturbed by IgMκ paraprotein, does not predict a risk of bleeding in this patient.
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Affiliation(s)
- Xin-Yao Wu
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, No. 197 Ruijin Second Road, Huangpu District, Shanghai, 200025, China
| | - Yu-Feng Yin
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, No. 197 Ruijin Second Road, Huangpu District, Shanghai, 200025, China
| | - Jia-Lin Teng
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, No. 197 Ruijin Second Road, Huangpu District, Shanghai, 200025, China
| | - Li-Wei Zhang
- Department of Clinical Laboratory, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, 200025, China
| | - Cheng-de Yang
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, No. 197 Ruijin Second Road, Huangpu District, Shanghai, 200025, China.
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Yu HY, Wang SJ, Teng JL, Ji XM, Wu ZC, Ma QC, Fu XJ. Effects of Radix aconiti lateralis preparata and Rhizoma zingiberis on energy metabolism and expression of the genes related to metabolism in rats. Chin J Integr Med 2012; 18:23-9. [PMID: 22231706 DOI: 10.1007/s11655-012-0964-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2011] [Indexed: 11/29/2022]
Abstract
OBJECTIVE To study the influence of Radix aconiti lateralis preparata and Rhizoma zingiberis, two species of Chinese medicinal herbs with hot property, on energy metabolism and gene expression spectrum, and to analyze the possible mechanism of their effects. METHODS Forty-eight specific pathogen free Wistar rats were randomly divided into a Radix aconiti lateralis preparata group, a Rhizoma zingiberis group, and a control group. They were intragastrically treated with concentrated decoction of Radix aconiti lateralis preparata, Rhizoma zingiberis and normal saline respectively for 20 days. Toe temperature (TT), energy intake (EI), digestible energy (DE), and metabolizable energy (ME) were measured. The content of adenosine triphosphate (ATP) and energy charge (EC) in hepatic tissue were measured with high performance liquid chromatography (HPLC). The activity of ATPase and succinate dehydrogenase (SDH) in the liver were detected with chemical colorimetry. The gene expression in the liver was detected with Illumina's rat Ref-12 gene array. The differential expression genes were selected, annotated and classified based on Gene Ontology (GO). Real-time quantitative reverse-transcriptase PCR (Q-RT-PCR) was used to test the accuracy of results. RESULTS Compared with the control group, the TT on the 10(th) day after the beginning of administration and ATP in the Radix aconiti lateralis preparata and Rhizoma zingiberis groups increased significantly (P<0.05). EI/body mass (BM), DE/BM, ME/BM, the hepatic EC and the activity of Na(+)-K(+)-ATPase, Ca(2+)-Mg(2+)-ATPase and SDH of liver increased significantly only in the Radix aconiti lateralis preparata group (P<0.05). There were 592 differential expression genes in the Radix aconiti lateralis preparata group and 1 159 in the Rhizoma zingiberis group compared with the control group. Among the differential expression genes, genes related to metabolic processes were the most significant based on GO analysis. There were 337 strips of gene differential expression in common in both Radix aconiti lateralis preparata and Rhizoma zingiberis groups compared with the control group. CONCLUSIONS Herbs with hot property such as Radix aconiti lateralis preparata and Rhizoma zingiberis could improve the energy metabolism in rats, through influencing the metabolic process of sugar, lipid, and amino acid. It could also promote the production, storage, and utilization of energy by regulating the gene expression related to metabolism, which may be the main molecular mechanism of warming yang and dispelling cold for the treatment of the cold syndrome according to Chinese medicine theory.
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Affiliation(s)
- Hua-Yun Yu
- Shandong University of Traditional Chinese Medicine, Jinan, 250355, China
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Yang CD, Teng JL, Gu YY, Chen SL. Takayasu’s arteritis presenting with bilateral pulmonary granulomatosis. Clin Rheumatol 2006; 26:612-4. [PMID: 16437361 DOI: 10.1007/s10067-005-0192-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2005] [Revised: 08/30/2005] [Accepted: 08/30/2005] [Indexed: 11/24/2022]
Abstract
Takayasu's arteritis (TA) is a vasculitis characterized by inflammation and obliteration of intermediate to large-size arteries. We report a case of Takayasu's arteritis with a presentation of bilateral pulmonary nodular infiltrates in a 21-year-old man. An open-lung biopsy showed characteristic changes of extra-vascular granulomatosis. To our knowledge, this has not been described previously in the literature.
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Affiliation(s)
- Cheng-De Yang
- Department of Rheumatology, Renji Hospital, Shanghai Second Medical University, #145 Shan Dong Zhong Road, Shanghai, China 200001.
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Yuen KY, Woo PC, Teng JL, Leung KW, Wong MK, Lau SK. Laribacter hongkongensis gen. nov., sp. nov., a novel gram-negative bacterium isolated from a cirrhotic patient with bacteremia and empyema. J Clin Microbiol 2001; 39:4227-32. [PMID: 11724825 PMCID: PMC88529 DOI: 10.1128/jcm.39.12.4227-4232.2001] [Citation(s) in RCA: 109] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
A bacterium was isolated from the blood and empyema of a cirrhotic patient. The cells were facultatively anaerobic, nonsporulating, gram-negative, seagull shaped or spiral rods. The bacterium grows on sheep blood agar as nonhemolytic, gray colonies 1 mm in diameter after 24 h of incubation at 37 degrees C in ambient air. Growth also occurs on MacConkey agar and at 25 and 42 degrees C but not at 4, 44, and 50 degrees C. The bacterium can grow in 1 or 2% but not 3, 4, or 5% NaCl. No enhancement of growth is observed with 5% CO(2). The organism is aflagellated and nonmotile at both 25 and 37 degrees C. It is oxidase, catalase, urease, and arginine dihydrolase positive, and it reduces nitrate. It does not ferment, oxidize, or assimilate any sugar tested. 16S rRNA gene sequencing showed that there are 91 base differences (6.2%), 112 base differences (7.7%), and 116 base differences (8.2%) between the bacterium and Microvirgula aerodenitrificans, Vogesella indigofera, and Chromobacterium species, respectively. The G+C content (mean and standard deviation) is 68.0% +/- 2.43%, and the genomic size is about 3 Mb. Based on phylogenetic affiliation, the bacterium belongs to the Neisseriaceae family of the beta-subclass of Proteobacteria. For these reasons, a new genus and species, Laribacter hongkongensis gen. nov., sp. nov., is proposed, for which HKU1 is the type strain. Further studies should be performed to ascertain the potential of this bacterium to become an emerging pathogen.
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Affiliation(s)
- K Y Yuen
- Department of Microbiology, The University of Hong Kong, Queen Mary Hospital, Hong Kong.
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