title: Comparison of soluble urokinase plasminogen activator receptor, soluble triggering receptor expressed on myeloid cells 1, procalcitonin and C-reactive protein in distinguishing concurrent bacterial infection from idiopathic inflammatory myopathy.
abstract: The aim of the study was to measure the diagnostic values of biomarkers of bacterial infection in idiopathic inflammatory myopathy (IIM) patients. The serum and clinical data of 82 IIM patients with/without bacterial infection were collected. Concentrations of soluble urokinase plasminogen activator receptor (suPAR), soluble triggering receptor expressed on myeloid cells 1 (sTREM-1), procalcitonin (PCT) and C-reactive protein (CRP) were measured in IIM patients and healthy controls. There were no significant differences in serum suPAR and sTREM-1 levels between healthy controls and non-infection IIM patients. Serum levels of suPAR, sTREM-1, PCT and CRP measured in this study were significantly higher in the IIM patient group with concurrent infection than in the non-infection IIM patient group (p < 0.05). The biomarker suPAR showed the highest diagnostic value with sensitivity, specificity, positive predictive value and negative predictive value of 81.6, 77.3, 75.6 and 82.9%, respectively. Combining suPAR negative and CRP negative to rule out bacterial infection in IIM patients provides a very high specificity of 97.4%. Both suPAR and CRP positive to confirm bacterial infection give the specificity of 90.9%. The inflammatory biomarkers suPAR, sTREM-1, PCT and CRP offer diagnostic accuracy in detecting bacterial infection in IIM patients. Particularly, suPAR is the most sensitive and specific biomarker to predict bacterial infection in IIM patients. Combination of suPAR and CRP serum levels provides an even better confirmation of bacterial infection.
authors.affiliation: Department of Rheumatology and Immunology, Xiangya Hospital, Institute of Rheumatology and Immunology, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan, People's Republic of China.
authors.forename: Yizhi
authors.initials: Y
authors.lastname: Xiao
authors.affiliation: Department of Rheumatology and Immunology, Xiangya Hospital, Institute of Rheumatology and Immunology, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan, People's Republic of China.
authors.forename: Hui
authors.initials: H
authors.lastname: Luo
authors.affiliation: Department of Rheumatology and Immunology, Xiangya Hospital, Institute of Rheumatology and Immunology, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan, People's Republic of China.
authors.forename: Bin
authors.initials: B
authors.lastname: Zhou
authors.affiliation: Department of Rheumatology and Immunology, Xiangya Hospital, Institute of Rheumatology and Immunology, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan, People's Republic of China.
authors.forename: Xiaodan
authors.initials: X
authors.lastname: Dai
authors.affiliation: Department of Rheumatology and Immunology, Xiangya Hospital, Institute of Rheumatology and Immunology, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan, People's Republic of China.
authors.forename: Jing
authors.initials: J
authors.lastname: Huang
authors.affiliation: Department of Rheumatology and Immunology, Xiangya Hospital, Institute of Rheumatology and Immunology, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan, People's Republic of China.
authors.forename: Liping
authors.initials: L
authors.lastname: Duan
authors.affiliation: Department of Rheumatology and Immunology, Xiangya Hospital, Institute of Rheumatology and Immunology, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan, People's Republic of China.
authors.forename: Yunhui
authors.initials: Y
authors.lastname: You
authors.affiliation: Department of Rheumatology and Immunology, Xiangya Hospital, Institute of Rheumatology and Immunology, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan, People's Republic of China.
authors.forename: Weiru
authors.initials: W
authors.lastname: Zhang
authors.affiliation: Department of Rheumatology and Immunology, Xiangya Hospital, Institute of Rheumatology and Immunology, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan, People's Republic of China.
authors.forename: Hongjun
authors.initials: H
authors.lastname: Zhao
authors.affiliation: Department of Rheumatology and Immunology, Xiangya Hospital, Institute of Rheumatology and Immunology, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan, People's Republic of China.
authors.forename: Yanli
authors.initials: Y
authors.lastname: Xie
authors.affiliation: Department of Rheumatology and Immunology, Xiangya Hospital, Institute of Rheumatology and Immunology, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan, People's Republic of China.
authors.forename: Yaou
authors.initials: Y
authors.lastname: Zhou
authors.affiliation: Department of Rheumatology and Immunology, Xiangya Hospital, Institute of Rheumatology and Immunology, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan, People's Republic of China.
authors.forename: Wangbin
authors.initials: W
authors.lastname: Ning
authors.affiliation: Department of Rheumatology and Immunology, Xiangya Hospital, Institute of Rheumatology and Immunology, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan, People's Republic of China.
authors.forename: Tong
authors.initials: T
authors.lastname: Li
authors.affiliation: Department of Rheumatology and Immunology, Xiangya Hospital, Institute of Rheumatology and Immunology, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan, People's Republic of China.
authors.forename: Sijia
authors.initials: S
authors.lastname: Liu
authors.affiliation: Department of Rheumatology and Immunology, Xiangya Hospital, Institute of Rheumatology and Immunology, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan, People's Republic of China.
authors.forename: Honglin
authors.initials: H
authors.lastname: Zhu
authors.affiliation: Department of Rheumatology and Immunology, Xiangya Hospital, Institute of Rheumatology and Immunology, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan, People's Republic of China.
authors.forename: Xiaoyun
authors.initials: X
authors.lastname: Xie
authors.affiliation: Department of Rheumatology and Immunology, Xiangya Hospital, Institute of Rheumatology and Immunology, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan, People's Republic of China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Jiang
authors.affiliation: Department of Rheumatology and Immunology, Xiangya Hospital, Institute of Rheumatology and Immunology, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan, People's Republic of China.
authors.forename: Shiyao
authors.initials: S
authors.lastname: Wu
authors.affiliation: Department of Rheumatology and Immunology, Xiangya Hospital, Institute of Rheumatology and Immunology, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan, People's Republic of China.
authors.forename: Weijia
authors.initials: W
authors.lastname: He
authors.affiliation: Department of Rheumatology and Immunology, Xiangya Hospital, Institute of Rheumatology and Immunology, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan, People's Republic of China. amandalee1996@hotmail.com.
authors.forename: Yisha
authors.initials: Y
authors.lastname: Li
mesh_terms: D000328:Adult; D001424:Bacterial Infections / Q000097:blood / Q000175:diagnosis*; D015415:Biomarkers / Q000097:blood; D002097:C-Reactive Protein / Q000378:metabolism*; D002116:Calcitonin / Q000097:blood*; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008297:Male; D008562:Membrane Glycoproteins / Q000097:blood*; D008875:Middle Aged; D009220:Myositis / Q000097:blood / Q000175:diagnosis*; D011971:Receptors, Immunologic / Q000097:blood*; D055293:Receptors, Urokinase Plasminogen Activator / Q000097:blood*; D000073871:Triggering Receptor Expressed on Myeloid Cells-1
chemical_list: D015415:Biomarkers; D008562:Membrane Glycoproteins; D011971:Receptors, Immunologic; D055293:Receptors, Urokinase Plasminogen Activator; C408842:TREM1 protein, human; D000073871:Triggering Receptor Expressed on Myeloid Cells-1; D002116:Calcitonin; D002097:C-Reactive Protein
keywords: Idiopathic inflammatory myopathy; Infection; Soluble triggering receptor expressed in myeloid cells 1; Soluble urokinase plasminogen activator receptor