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Silva ÂAO, Lima AA, Vasconcelos LDCM, de Almeida RA, de Freitas NEM, Habib FL, Oliva TA, da Silva MFDCR, de Siqueira IC, Santos FLN. Performance Assessment of Treponemal and Nontreponemal Tests for the Diagnosis of Acquired Syphilis. Am J Trop Med Hyg 2024; 110:1237-1244. [PMID: 38593786 PMCID: PMC11154036 DOI: 10.4269/ajtmh.23-0238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Accepted: 10/30/2023] [Indexed: 04/11/2024] Open
Abstract
There are a variety of nontreponemal test (NTT) and treponemal test (TT) kits for the serologic diagnosis of syphilis. Because of the complexity of the infection (multiple clinical stages) and the different antigens used in these kits, a systematic evaluation of the accuracy of the currently available commercial tests is warranted. Our objective was to evaluate the performance of commercially available tests for the diagnosis of syphilis infection. In this study, we analyzed one NTT (Venereal Disease Research Laboratory [VDRL] test, Wiener Laboratories, Rosario, Argentina) and two TTs (fluorescent treponemal antibody absorption [FTA-ABS] test, Euroimmun, Lübeck, Germany, and syphilis recombinant ELISA v. 4.0 test [ELISA], Wiener Laboratories, Rosario, Argentina) using a panel of 187 samples, including serum samples from 31 individuals with primary syphilis, 77 with secondary syphilis, and 79 with latent syphilis. An additional 192 samples from uninfected individuals and 323 serum samples from individuals with other diseases were included. The sensitivities of the VDRL, ELISA, and FTA-ABS tests were 97.9%, 100%, and 96.3%, respectively. The VDRL and ELISA tests showed a specificity of 100%, and the FTA-ABS test showed a specificity of 99.5%. Accuracy was 98.9% for the VDRL test, 100% for the ELISA, and 97.9% for the FTA-ABS test. For primary, secondary, and latent syphilis, the ELISA achieved a diagnostic performance of 100%, whereas the sensitivity for the VDRL and FTA-ABS tests ranged from 96.8% to 98.7% and 93.7% to 98.7%, respectively. No difference was observed when the tests were used as traditional or reverse algorithms. In general, all three tests are able to discriminate positive and negative samples for syphilis, regardless of the diagnostic algorithm.
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Affiliation(s)
- Ângelo Antônio Oliveira Silva
- Advanced Public Health Laboratory, Institute Gonçalo Moniz, Foundation Oswaldo Cruz (FIOCRUZ-BA), Salvador, Brazil
- Salvador University (UNIFACS), Salvador, Brazil
| | - Ayla Araújo Lima
- Advanced Public Health Laboratory, Institute Gonçalo Moniz, Foundation Oswaldo Cruz (FIOCRUZ-BA), Salvador, Brazil
| | | | - Rosângela Andrade de Almeida
- Advanced Public Health Laboratory, Institute Gonçalo Moniz, Foundation Oswaldo Cruz (FIOCRUZ-BA), Salvador, Brazil
| | | | - Fernanda Lopes Habib
- Advanced Public Health Laboratory, Institute Gonçalo Moniz, Foundation Oswaldo Cruz (FIOCRUZ-BA), Salvador, Brazil
| | - Talita Andrade Oliva
- State Center Specializing in Diagnosis, Assistance, and Research (CEDAP), Salvador, Brazil
| | | | - Isadora Cristina de Siqueira
- Laboratory of Experimental Pathology, Institute Gonçalo Moniz, Foundation Oswaldo Cruz (FIOCRUZ-BA), Salvador, Brazil
| | - Fred Luciano Neves Santos
- Advanced Public Health Laboratory, Institute Gonçalo Moniz, Foundation Oswaldo Cruz (FIOCRUZ-BA), Salvador, Brazil
- Integrated Translational Program in Chagas Disease from Fiocruz (Fio-Chagas), Rio de Janeiro, Brazil
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Xiong S, Liu Z, Zhang X, Huang S, Ding X, Zhou J, Yao J, Li W, Liu S, Zhao F. Resurgence of syphilis: focusing on emerging clinical strategies and preclinical models. J Transl Med 2023; 21:917. [PMID: 38105236 PMCID: PMC10726518 DOI: 10.1186/s12967-023-04685-4] [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: 07/02/2023] [Accepted: 10/30/2023] [Indexed: 12/19/2023] Open
Abstract
Syphilis, a sexually transmitted disease (STD) caused by Treponema pallidum (T. pallidum), has had a worldwide resurgence in recent years and remains a public health threat. As such, there has been a great deal of research into clinical strategies for the disease, including diagnostic biomarkers and possible strategies for treatment and prevention. Although serological testing remains the predominant laboratory diagnostic method for syphilis, it is worth noting that investigations pertaining to the DNA of T. pallidum, non-coding RNAs (ncRNAs), chemokines, and metabolites in peripheral blood, cerebrospinal fluid, and other bodily fluids have the potential to offer novel perspectives on the diagnosis of syphilis. In addition, the global spread of antibiotic resistance, such as macrolides and tetracyclines, has posed significant challenges for the treatment of syphilis. Fortunately, there is still no evidence of penicillin resistance. Hence, penicillin is the recommended course of treatment for syphilis, whereas doxycycline, tetracycline, ceftriaxone, and amoxicillin are viable alternative options. In recent years, efforts to discover a vaccine for syphilis have been reignited with better knowledge of the repertoire of T. pallidum outer membrane proteins (OMPs), which are the most probable syphilis vaccine candidates. However, research on therapeutic interventions and vaccine development for human subjects is limited due to practical and ethical considerations. Thus, the preclinical model is ideal for conducting research, and it plays an important role in clinical transformation. Different preclinical models have recently emerged, such as in vitro culture and mouse models, which will lay a solid foundation for clinical treatment and prevention of syphilis. This review aims to provide a comprehensive summary of the most recent syphilis tactics, including detection, drug resistance treatments, vaccine development, and preclinical models in clinical practice.
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Affiliation(s)
- Shun Xiong
- Institute of Pathogenic Biology and Key Laboratory of Special Pathogen Prevention and Control of Hunan Province, Hengyang Medical College, University of South China, Hengyang, 421001, China
| | - Zhaoping Liu
- Institute of Pathogenic Biology and Key Laboratory of Special Pathogen Prevention and Control of Hunan Province, Hengyang Medical College, University of South China, Hengyang, 421001, China
| | - Xiaohong Zhang
- Institute of Pathogenic Biology and Key Laboratory of Special Pathogen Prevention and Control of Hunan Province, Hengyang Medical College, University of South China, Hengyang, 421001, China
| | - Shaobin Huang
- Institute of Pathogenic Biology and Key Laboratory of Special Pathogen Prevention and Control of Hunan Province, Hengyang Medical College, University of South China, Hengyang, 421001, China
| | - Xuan Ding
- Institute of Pathogenic Biology and Key Laboratory of Special Pathogen Prevention and Control of Hunan Province, Hengyang Medical College, University of South China, Hengyang, 421001, China
| | - Jie Zhou
- Institute of Pathogenic Biology and Key Laboratory of Special Pathogen Prevention and Control of Hunan Province, Hengyang Medical College, University of South China, Hengyang, 421001, China
| | - Jiangchen Yao
- Institute of Pathogenic Biology and Key Laboratory of Special Pathogen Prevention and Control of Hunan Province, Hengyang Medical College, University of South China, Hengyang, 421001, China
| | - Weiwei Li
- Institute of Pathogenic Biology and Key Laboratory of Special Pathogen Prevention and Control of Hunan Province, Hengyang Medical College, University of South China, Hengyang, 421001, China
| | - Shuangquan Liu
- Institute of Pathogenic Biology and Key Laboratory of Special Pathogen Prevention and Control of Hunan Province, Hengyang Medical College, University of South China, Hengyang, 421001, China.
- Department of Clinical Laboratory Medicine, The First Affiliated Hospital, Institution of Microbiology and Infectious Diseases, Hengyang Medical College, University of South China, Hengyang, 421001, China.
| | - Feijun Zhao
- Institute of Pathogenic Biology and Key Laboratory of Special Pathogen Prevention and Control of Hunan Province, Hengyang Medical College, University of South China, Hengyang, 421001, China.
- Department of Clinical Laboratory Medicine, The First Affiliated Hospital, Institution of Microbiology and Infectious Diseases, Hengyang Medical College, University of South China, Hengyang, 421001, China.
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de Sá Queiroz JHF, dos Santos Barbosa M, Miranda LGO, de Oliveira NR, Dellagostin OA, Marchioro SB, Simionatto S. Tp0684, Tp0750, and Tp0792 Recombinant Proteins as Antigens for the Serodiagnosis of Syphilis. Indian J Microbiol 2022; 62:419-427. [PMID: 35974924 PMCID: PMC9375814 DOI: 10.1007/s12088-022-01017-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Accepted: 03/20/2022] [Indexed: 11/28/2022] Open
Abstract
The incidence of syphilis has increased alarmingly over the years. Its diagnosis continues to be a challenge, leading to the search for new alternative and effective methods. The objective of this study was to select and evaluate three Treponema pallidum recombinant proteins for potential use in syphilis serodiagnosis. Bioinformatics analysis was performed with three T. pallidum antigens (Tp0684, Tp0750, and Tp0792) to assess their physical, antigenic, and structural characteristics. The antigens were chemically synthesized, recombinant plasmids were expressed in Escherichia coli BL21 Star™ (DE3), and the recombinant proteins were purified by nickel affinity chromatography. The antigenicity of the recombinant proteins was evaluated by western blotting and enzyme-linked immunosorbent assay (ELISA), using the sera from patients with primary and latent syphilis. In silico analysis indicated the antigenic potential once the exposed B cell epitopes were detected in the evaluated proteins. Sera from patients with primary and latent syphilis specifically recognized rTp0684, rTp0750, and rTp0792 recombinant antigens. Moreover, the rTp0684-ELISA receiver operating characteristic (ROC) analysis showed an area under the ROC curve of 0.99, indicating high diagnostic efficacy with 97.62% specificity and 95% sensitivity. In conclusion, rTp0684 showed better potential as an antigen for the development of syphilis serodiagnosis. Thus, bioinformatic analysis can be an important tool to guide the selection of antigens for serological diagnosis. Supplementary Information The online version contains supplementary material available at 10.1007/s12088-022-01017-w.
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Affiliation(s)
- Júlio Henrique Ferreira de Sá Queiroz
- Laboratório de Pesquisa em Ciências da Saúde, Universidade Federal da Grande Dourados - UFGD, Rodovia Dourados - Itahum, km 12, Cidade Universitária, Dourados, MS 79804970 Brazil
| | - Marcelo dos Santos Barbosa
- Laboratório de Pesquisa em Ciências da Saúde, Universidade Federal da Grande Dourados - UFGD, Rodovia Dourados - Itahum, km 12, Cidade Universitária, Dourados, MS 79804970 Brazil
| | - Lais Gonçalves Ortolani Miranda
- Laboratório de Pesquisa em Ciências da Saúde, Universidade Federal da Grande Dourados - UFGD, Rodovia Dourados - Itahum, km 12, Cidade Universitária, Dourados, MS 79804970 Brazil
| | | | | | - Silvana Beutinger Marchioro
- Laboratório de Pesquisa em Ciências da Saúde, Universidade Federal da Grande Dourados - UFGD, Rodovia Dourados - Itahum, km 12, Cidade Universitária, Dourados, MS 79804970 Brazil
- Laboratório de Imunologia e Biologia Molecular, Instituto de Ciências da Saúde, Universidade Federal da Bahia, Salvador, BA Brazil
| | - Simone Simionatto
- Laboratório de Pesquisa em Ciências da Saúde, Universidade Federal da Grande Dourados - UFGD, Rodovia Dourados - Itahum, km 12, Cidade Universitária, Dourados, MS 79804970 Brazil
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Chen D, Wang S, He Y, Fu Y, Zhao F, Zhou X, Yin H, Wan J, Huang Y, Wu Y, Cao L, Zeng T. Assessment of recombinant antigens Tp0100 and Tp1016 of Treponema pallidum for serological diagnosis of syphilis. J Clin Lab Anal 2022; 36:e24635. [PMID: 35908795 PMCID: PMC9459255 DOI: 10.1002/jcla.24635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2022] [Revised: 07/08/2022] [Accepted: 07/13/2022] [Indexed: 11/30/2022] Open
Abstract
Objective To discover novel serodiagnostic candidates for the serological diagnosis of syphilis. Methods Two recombinant Treponema pallidum proteins Tp0100 and Tp1016 were expressed, purified, and identified by Western Blotting. A total of 600 clinical serum samples were tested with the Tp0100‐based ELISA, the Tp1016‐based ELISA, and the commercial LICA Syphilis TP kit (ChIVD, Beijing, China). The sensitivities were determined by testing 340 samples from individuals with clinically diagnosed primary, secondary, latent, and tertiary syphilis. The specificities were determined by screening 260 samples from healthy controls and individuals with potentially cross‐reactive infections, including leptospirosis, Lyme disease, hepatitis B, tuberculosis, rheumatoid arthritis, systemic lupus erythematosus. Kappa (κ) values were applied to compare the agreement between clinical syphilis diagnosis and the Tp0100‐based ELISA, the Tp1016‐based ELISA, or the LICA Syphilis TP test. Results Using clinical syphilis diagnosis as the gold standard, Tp0100 exhibited an overall sensitivity of 95.6% and specificity of 98.1% for testing IgG antibody while Tp1016 demonstrated only an overall sensitivity of 75.0% and specificity of 79.6%. In contrast, the LICA Syphilis TP test revealed an overall sensitivity of 97.6% and specificity of 96.2%. In addition, the overall percent agreement and corresponding κ values were 96.7% (95% CI 95.6%–97.8%) and 0.93 for the Tp0100‐based ELISA, 77.0% (95% CI 74.3%–79.7%) and 0.54 for the Tp1016‐based ELISA, and 97.0% (95% CI 96.0%–98.0%) and 0.94 for the LICA Syphilis TP test, respectively. Conclusion The recombinant T. pallidum protein Tp0100 shows promise as a novel diagnostic antigen in the serological tests for syphilis.
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Affiliation(s)
- Dejun Chen
- Institution of Pathogenic Biology and Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hengyang Medical School, University of South China, Hengyang, China.,Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, China
| | - Siqian Wang
- Clinical laboratory of the First Pepole's Hospital of Changde City, Changde, China
| | - Yuxing He
- Institution of Pathogenic Biology and Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hengyang Medical School, University of South China, Hengyang, China.,Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, China
| | - Yue Fu
- Institution of Pathogenic Biology and Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hengyang Medical School, University of South China, Hengyang, China.,Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, China
| | - Feijun Zhao
- Institution of Pathogenic Biology and Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hengyang Medical School, University of South China, Hengyang, China.,Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, China
| | - Xiuping Zhou
- Department of Laboratory Medicine, Changsha Health Vocational College, Changsha, China
| | - Haoquan Yin
- Department of Clinical Medical Undergraduates, Hengyang Medical School, University of South China, Hengyang, China
| | - Jia Wan
- Department of Clinical Medical Undergraduates, Hengyang Medical School, University of South China, Hengyang, China
| | - Yunting Huang
- Department of Clinical Medical Undergraduates, Hengyang Medical School, University of South China, Hengyang, China
| | - Yimou Wu
- Institution of Pathogenic Biology and Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hengyang Medical School, University of South China, Hengyang, China.,Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, China
| | - Longgu Cao
- College of Medical Imaging Laboratory and Rehabilitation, Xiangnan University, Chenzhou, China
| | - Tiebing Zeng
- Institution of Pathogenic Biology and Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hengyang Medical School, University of South China, Hengyang, China.,Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, China
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5
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Noda AA, Méndez M, Rodríguez I, Šmajs D. Genetic Recombination in Treponema pallidum: Implications for Diagnosis, Epidemiology, and Vaccine Development. Sex Transm Dis 2022; 49:e7-e10. [PMID: 34618784 DOI: 10.1097/olq.0000000000001497] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Angel A Noda
- From the Department of Mycology-Bacteriology, Institute of Tropical Medicine "Pedro Kourí," Havana, Cuba
| | - Melisa Méndez
- From the Department of Mycology-Bacteriology, Institute of Tropical Medicine "Pedro Kourí," Havana, Cuba
| | - Islay Rodríguez
- From the Department of Mycology-Bacteriology, Institute of Tropical Medicine "Pedro Kourí," Havana, Cuba
| | - David Šmajs
- Department of Biology, Masaryk University, Brno, Czech Republic
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Lu DP, Jia J, Wei SF, Zhang WL, Liang R, Liu T, Yang WZ, Li BY, Zhang R, Wang F. Treponema pallidum (syphilis) antigen TpF1 induces activation of macrophages and accelerates P2X7R-induced NLRP3-dependent release of IL-1β. Endocr Metab Immune Disord Drug Targets 2021; 22:425-432. [PMID: 34649493 DOI: 10.2174/1871530321666211015091109] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Revised: 06/02/2021] [Accepted: 08/31/2021] [Indexed: 11/22/2022]
Abstract
BACKGROUND Syphilis is a chronic infectious disease caused by Treponema pallidum (Tp) infection, which causes local inflammation in the host. TpF1 is an oligomeric protein expressed by the Tp-infected host that can induce the host immune response. There are few studies regarding the role of TpF1 in macrophage activation and the subsequent release of cytokines. OBJECTIVE To elucidate the effects of TpF1 on the pathological process of Syphilis. In addition, we explored how purinergic 2X7 (P2X7R) induced NOD-like receptor family protein 3 (NLRP3) -dependent release of interleukin-1β (IL-1β) and the underlying mechanisms. METHODS We explored the influence of TpF1 on cytokine release by macrophages using qRT-PCR and ELISA. The specific phenotype of activated macrophages was determined by flow cytometry. RESULTS TpF1 was able to activate macrophages and induce the M1 macrophage phenotype. Moreover, TpF1 activated the NLRP3 inflammasome in macrophages, which was mediated by P2X7R. CONCLUSIONS The Tp-induced protein TpF1 is able to induce macrophage activation and P2X7R-induced NLRP3-dependent release of IL-1β. Our findings provide a theoretical basis for clarifying the clinical symptoms and pathogenesis of syphilis.
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Affiliation(s)
- Dong-Ping Lu
- Department of Dermatology, Shenzhen Bao'an Traditional Chinese Medicine Hospital Group, Shenzhen 518133 Guangdong. China
| | - Jie Jia
- Department of Dermatology, Shenzhen Bao'an Traditional Chinese Medicine Hospital Group, Shenzhen 518133 Guangdong. China
| | - Shao-Feng Wei
- Shenzhen Bao'an District Chronic Disease Hospital for Prevention and Cure, Shenzhen 518133 Guangdong. China
| | - Wei-Lian Zhang
- Department of Dermatology, Shenzhen Bao'an Traditional Chinese Medicine Hospital Group, Shenzhen 518133 Guangdong. China
| | - Rui Liang
- Department of Dermatology, Shenzhen Bao'an Traditional Chinese Medicine Hospital Group, Shenzhen 518133 Guangdong. China
| | - Ting Liu
- Department of Dermatology, Shenzhen Bao'an Traditional Chinese Medicine Hospital Group, Shenzhen 518133 Guangdong. China
| | - Wen-Zhi Yang
- Department of Dermatology, Shenzhen Bao'an Traditional Chinese Medicine Hospital Group, Shenzhen 518133 Guangdong. China
| | - Bing-Yan Li
- Department of Dermatology, Shenzhen Bao'an Traditional Chinese Medicine Hospital Group, Shenzhen 518133 Guangdong. China
| | - Rong Zhang
- Department of Dermatology, Shenzhen Bao'an Traditional Chinese Medicine Hospital Group, Shenzhen 518133 Guangdong. China
| | - Fen Wang
- Department of Obstetrics,Huangshi Maternity&Children's Health Hospital Edong Healthcare Group.Huangshi 435000,Hubei. China
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Luo X, Lin SW, Xu QY, Ke WJ, Gao ZX, Tong ML, Liu LL, Lin LR, Zhang HL, Yang TC. Tp0136 targets fibronectin (RGD)/Integrin β1 interactions promoting human microvascular endothelial cell migration. Exp Cell Res 2020; 396:112289. [DOI: 10.1016/j.yexcr.2020.112289] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Revised: 09/13/2020] [Accepted: 09/14/2020] [Indexed: 12/17/2022]
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Silva ÂAO, de Oliveira UD, Vasconcelos LDCM, Foti L, Leony LM, Daltro RT, Leitolis A, Lima FWDM, Krieger MA, Zanchin NIT, Santos FLN. Performance of Treponema pallidum recombinant proteins in the serological diagnosis of syphilis. PLoS One 2020; 15:e0234043. [PMID: 32555593 PMCID: PMC7302711 DOI: 10.1371/journal.pone.0234043] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Accepted: 05/18/2020] [Indexed: 11/18/2022] Open
Abstract
Syphilis serodiagnosis is challenging because distinct clinical forms of the infection may influence serological performance and discordant results between tests make clinical decisions difficult. Several recombinant Treponema pallidum-proteins have already been tested for syphilis diagnosis and they are critical to achieve high accuracy in serological testing. Our aim was to assess the varied from performance of T. pallidum-recombinant proteins TmpA, TpN17 and TpN47 for syphilis serodiagnosis. The proteins were evaluated using sera of 338 T. pallidum-negative, 173 T. pallidum-positive individuals and 209 sera from individuals infected with unrelated diseases. The diagnostic potential was validated by analysis of ROC curves. In the liquid microarray analyses, the ROC curve varied from 99.0% for TmpA and TpN17 to 100% for TpN47. The sensitivity score yielded values of up to 90% for TpN17, 100% for TpN47 and 80.0% for TmpA. The lowest and highest specificity values were presented by TpN47 (91.9%) and TmpA antigens (100%), respectively. TpN47 showed the highest accuracy score (95.5%) among all the recombinant proteins assayed. For the ELISA, the ROC curve was 97.2%, 91.8% and 81.6% for TpN17, TmpA and TpN47, respectively. TpN17 and TmpA yielded a sensitivity of 69.9%, while TpN47 obtained a value of 53.8%. Specificity was almost 100% for all three proteins. No cross-reaction was observed for TpN17 in the serum samples from non-bacterial infections. Regarding leptospirosis-positive samples, cross-reactivity score was varied from 8.6 to 34.6%. This is most probably due to conservation of the epitopes in these proteins across bacteria. The use of recombinant proteins in immunoassays for syphilis diagnosis was showed provide greater reliability to results of the treponemal assays. Despite the low sensitivity, the proteins showed high diagnostic capacity due to the AUC values found. However, an improvement in sensitivity could be achieved when antigenic mixtures are evaluated.
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Affiliation(s)
| | | | | | - Leonardo Foti
- Carlos Chagas Institute, Oswaldo Cruz Foundation (Fiocruz-PR), Curitiba, Paraná, Brazil
| | - Leonardo Maia Leony
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (Fiocruz-BA), Salvador, Bahia, Brazil
| | - Ramona Tavares Daltro
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (Fiocruz-BA), Salvador, Bahia, Brazil
| | | | | | - Marco Aurélio Krieger
- Carlos Chagas Institute, Oswaldo Cruz Foundation (Fiocruz-PR), Curitiba, Paraná, Brazil
- Molecular Biology Institute of Paraná, Curitiba, Paraná, Brazil
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Zhou X, Liu H, Zhang J, Mu J, Zalan Z, Hegyi F, Takács K, Zhao X, Du M. Protective effect of Lactobacillus fermentum CQPC04 on dextran sulfate sodium–induced colitis in mice is associated with modulation of the nuclear factor-κB signaling pathway. J Dairy Sci 2019; 102:9570-9585. [DOI: 10.3168/jds.2019-16840] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2019] [Accepted: 07/10/2019] [Indexed: 12/16/2022]
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Liu W, Deng M, Zhang X, Yin W, Zhao T, Zeng T, Liu S, Xiao Y, Zhang L, Luo X, Zhao F. Performance of novel infection phase-dependent antigens in syphilis serodiagnosis and treatment efficacy determination. Clin Chim Acta 2018; 488:13-19. [PMID: 30326217 DOI: 10.1016/j.cca.2018.10.017] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Revised: 09/12/2018] [Accepted: 10/09/2018] [Indexed: 11/25/2022]
Abstract
OBJECTIVE The objective of this study was to screen new antigens for syphilis serodiagnosis. METHODS First, we determined whether the Treponema pallidum proteins Tp0971, Tp0768 and Tp0462 were infection phase-dependent antigens by observing serum reactivity differences in New Zealand rabbits infected with activated or inactivated T. pallidum. A non-infection phase-dependent antigen, the Tp92 membrane protein, was used as the negative control. Next, Tp0971-, Tp0768- and Tp0462-based ELISA was performed on 2138 human serum samples and compared with the T. pallidum passive particle agglutination assay (TPPA) and LiZhu™ Tp-ELISA. In addition, another 60 paired serum samples from patients at follow-up were analysed to evaluate the relationships between titre changes and differences in the A450 nm values of the Tp0971, Tp0768, Tp0462 and Tp92 antibodies measured by ELISA. RESULTS Compared with Tp92 (negative control), Tp0971, Tp0768 and Tp0462 were determined to be infection phase-dependent antigens. Compared with those of the TPPA, the sensitivities of Tp0971-, Tp0768- and Tp0462-based ELISA were 96.4%, 96.9% and 93.0%, respectively, and the specificities were 97.7%, 95.4% and 98.9%, respectively, resulting in consistencies of 97.1%, 96.2% and 95.9%, respectively. Compared with those of the LiZhu™ Tp-ELISA, the consistencies of Tp0971-, Tp0768- and Tp0462-based ELISA were 95.1%, 94.2% and 94.0%, respectively, with kappa values of 0.902, 0.884 and 0.880, respectively. Tp0971, Tp0768 and Tp0462 demonstrated high sensitivities and specificities, as well as high conformity to the TPPA and LiZhu™ Tp-ELISA. Moreover, a significantly positive Spearman rank correlation coefficient (0.82,*P < 0.05) was found between the difference in the A450 nm values of the Tp0971 antibody and the RPR titre change. CONCLUSION The infection phase-dependent antigens Tp0971, Tp0768 and Tp0462 are promising for syphilis diagnosis, and Tp0971 may be utilized to monitor curative effects during syphilis treatment.
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Affiliation(s)
- Wen Liu
- Pathogenic Biology Institute, Hengyang Medical College, University of South China, Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, University of South China, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang 421001, China
| | - Meixia Deng
- Pathogenic Biology Institute, Hengyang Medical College, University of South China, Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, University of South China, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang 421001, China
| | - Xiaohong Zhang
- Pathogenic Biology Institute, Hengyang Medical College, University of South China, Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, University of South China, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang 421001, China; Department of Histology and Embryology, Hengyang Medical College, University of South China, Hengyang 421001, China
| | - Weiguo Yin
- Laboratory Department, Yuebei People's Hospital, Shaoguan 5120264, China
| | - Tie Zhao
- Pathogenic Biology Institute, Hengyang Medical College, University of South China, Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, University of South China, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang 421001, China
| | - Tiebing Zeng
- Pathogenic Biology Institute, Hengyang Medical College, University of South China, Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, University of South China, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang 421001, China
| | - Shuangquan Liu
- Clinical Laboratory Department, The First Affiliated Hospital of the University of South China, Hengyang 421001, China
| | - Yongjian Xiao
- Clinical Laboratory Department, The Second Affiliated Hospital of the University of South China, Hengyang 421001, China
| | - Li Zhang
- Clinical Laboratory Department, Changde Hospital of the University of South China, Changde 415000, China
| | - Xi Luo
- Pathogenic Biology Institute, Hengyang Medical College, University of South China, Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, University of South China, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang 421001, China
| | - Feijun Zhao
- Pathogenic Biology Institute, Hengyang Medical College, University of South China, Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, University of South China, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang 421001, China.
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11
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Zhang L, Deng M, Zhang X, Yin W, Liu W, Luo X, Yang J, Chen F, Zhao F. Serological evaluation of antigen Tp0693 for diagnosis of syphilis. Exp Ther Med 2017; 14:4729-4736. [PMID: 29201173 PMCID: PMC5704258 DOI: 10.3892/etm.2017.5158] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Accepted: 06/15/2017] [Indexed: 12/05/2022] Open
Abstract
The aim of the present study was to evaluate the diagnostic value of the Treponema pallidum (Tp) antigen Tp0693 for syphilis. ELISA was used to examine the serum levels of Tp0693. The sample-to-cutoff ratio (S/CO) value was used to generate a receiver operating characteristic (ROC) curve. A correlation analysis was performed to compare the detection efficacy of Tp0693-specific ELISA, Treponema pallidum Particle Agglutination (TPPA), Tolulized Red Unheated Serum test (TRUST) and LiZhu™ Tp-ELISA. The area under the ROC curve was 0.99, indicating good diagnostic efficacy. When the diagnostic specificity reached 100%, the diagnostic sensitivity was up to 93.5%. Tp0693-specific ELISA results were not correlated with those of TPPA, TRUST and LiZhu™ Tp-ELISA (correlation coefficient, 0.122, 0.114 and 0.025, respectively). The latent syphilis rate was highest (12%, 9/75) for all syphilis specimens with a S/CO in the grey area. In conclusion, for syphilis specimens with a S/CO in the grey area, TPPA should be used for further confirmation of the diagnosis. Tp0693 may be used as a diagnostic antigen for syphilis; however, further study regarding its potential use is required.
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Affiliation(s)
- Li Zhang
- Department of Laboratory, The First People's Hospital of Changde Affiliated to The University of South China, Changde, Hunan 415000, P.R. China
- Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Institute of Pathogenic Biology, University of South China, Hengyang, Hunan 421001, P.R. China
| | - Meixia Deng
- Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Institute of Pathogenic Biology, University of South China, Hengyang, Hunan 421001, P.R. China
| | - Xiaohong Zhang
- Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Institute of Pathogenic Biology, University of South China, Hengyang, Hunan 421001, P.R. China
| | - Weiguo Yin
- Department of Laboratory, Yuebei People's Hospital, Shaoguan, Guangdong 512026, P.R. China
- Department of Molecular Biology Research Center, Qingyuan People's Hospital, Qingyuan, Guangdong 511500, P.R. China
| | - Wen Liu
- Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Institute of Pathogenic Biology, University of South China, Hengyang, Hunan 421001, P.R. China
| | - Xi Luo
- Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Institute of Pathogenic Biology, University of South China, Hengyang, Hunan 421001, P.R. China
| | - Jie Yang
- Department of Clinical Medicine, Medical College, University of South China, Hengyang, Hunan 421001, P.R. China
| | - Fei Chen
- Department of Clinical Medicine, Medical College, University of South China, Hengyang, Hunan 421001, P.R. China
| | - Feijun Zhao
- Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Institute of Pathogenic Biology, University of South China, Hengyang, Hunan 421001, P.R. China
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12
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Novel Treponema pallidum Recombinant Antigens for Syphilis Diagnostics: Current Status and Future Prospects. BIOMED RESEARCH INTERNATIONAL 2017; 2017:1436080. [PMID: 28523273 PMCID: PMC5421087 DOI: 10.1155/2017/1436080] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/02/2017] [Accepted: 03/21/2017] [Indexed: 11/18/2022]
Abstract
The recombinant protein technology considerably promoted the development of rapid and accurate treponema-specific laboratory diagnostics of syphilis infection. For the last ten years, the immunodominant recombinant inner membrane lipoproteins are proved to be sensitive and specific antigens for syphilis screening. However, the development of an enlarged T. pallidum antigen panel for diagnostics of early and late syphilis and differentiation of syphilis stages or cured syphilis remains as actual goal of multidisciplinary expertise. Current review revealed novel recombinant antigens: surface-exposed proteins, adhesins, and periplasmic and flagellar proteins, which are promising candidates for the improved syphilis serological diagnostics. The opportunities and limitations of diagnostic usage of these antigens are discussed and the criteria for selection of optimal antigens panel summarized.
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13
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You X, Li R, Wan K, Liu L, Xie X, Zhao L, Wu N, Deng X, Wang L, Zeng Y. Evaluation of Rv0220, Rv2958c, Rv2994 and Rv3347c of Mycobacterium tuberculosis for serodiagnosis of tuberculosis. Microb Biotechnol 2017; 10:604-611. [PMID: 28217905 PMCID: PMC5404193 DOI: 10.1111/1751-7915.12697] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2017] [Accepted: 01/18/2017] [Indexed: 11/26/2022] Open
Abstract
Tuberculosis (TB), the leading cause of death among infectious diseases worldwide, is caused by Mycobacterium tuberculosis (M. tuberculosis). Early accurate diagnosis means earlier prevention, treatment and control of TB. To confirm efficient diagnostic antigens for M. tuberculosis, the serodiagnosis value of four recombinant proteins including Rv0220, Rv2958c, Rv2994 and Rv3347c was evaluated in this study. The specificities and sensitivities of four recombinant proteins were determined based on enzyme‐linked immunosorbent assay (ELISA) by screening sera from smear‐positive pulmonary TB patients (n = 92), uninfected individuals (n = 60) and patients with Mycoplasma pneumoniae (n = 32) that potentially cross‐react with M. tuberculosis. The ELISAs showed that Rv0220, Rv2958c, Rv2994 and Rv3347c exhibited high specificities and sensitivities in detecting immunoglobulin G (IgG) antibody, with 98.3/91.3%, 91.7/85.9%, 93.3/89.1% and 93.3/80.4% respectively. According to the receiver‐operating characteristic (ROC) analysis, the area under the ROC of the target proteins was 0.988, 0.969, 0.929 and 0.945 respectively. Western blot was established to evaluate the immunoreactivities of target proteins to mice and human sera. Results demonstrated that Rv0220, Rv2958c, Rv2994 and Rv3347c could specifically recognize TB‐positive sera and the sera of mice immunized with the corresponding protein. Thus, Rv0220, Rv2958c, Rv2994 and Rv3347c were valuable potential diagnostic antigens for M. tuberculosis.
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Affiliation(s)
- Xiaolong You
- Institute of Pathogenic Biology, Medical College, University of South China, Hengyang, 421001, China.,Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hengyang, 421001, China.,Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Hengyang, 421001, China.,Clinical laboratory, The First Affiliated Hospital of University of South China, Hengyang, 421000, China
| | - Ranhui Li
- Institute of Pathogenic Biology, Medical College, University of South China, Hengyang, 421001, China.,Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hengyang, 421001, China.,Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Hengyang, 421001, China
| | - Kanglin Wan
- State Key Laboratory for Infectious Disease Prevention and Control/National Institute for communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, 102206, China
| | - Liangzhuan Liu
- Institute of Pathogenic Biology, Medical College, University of South China, Hengyang, 421001, China.,Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hengyang, 421001, China.,Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Hengyang, 421001, China
| | - Xiaoping Xie
- Clinical laboratory, Hengyang No.1 People's Hospital, Hengyang, 421001, China
| | - Lanhua Zhao
- Institute of Pathogenic Biology, Medical College, University of South China, Hengyang, 421001, China.,Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hengyang, 421001, China.,Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Hengyang, 421001, China
| | - Ning Wu
- Clinical laboratory, The First Affiliated Hospital of University of South China, Hengyang, 421000, China
| | - Xiangying Deng
- Institute of Pathogenic Biology, Medical College, University of South China, Hengyang, 421001, China.,Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hengyang, 421001, China.,Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Hengyang, 421001, China
| | - Li Wang
- Institute of Pathogenic Biology, Medical College, University of South China, Hengyang, 421001, China.,Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hengyang, 421001, China.,Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Hengyang, 421001, China
| | - Yanhua Zeng
- Institute of Pathogenic Biology, Medical College, University of South China, Hengyang, 421001, China.,Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hengyang, 421001, China.,Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Hengyang, 421001, China
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14
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Xie Y, Xu M, Wang C, Xiao J, Xiao Y, Jiang C, You X, Zhao F, Zeng T, Liu S, Kuang X, Wu Y. Diagnostic value of recombinant Tp0821 protein in serodiagnosis for syphilis. Lett Appl Microbiol 2016; 62:336-43. [PMID: 26853900 DOI: 10.1111/lam.12554] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2015] [Revised: 01/31/2016] [Accepted: 02/01/2016] [Indexed: 12/15/2022]
Abstract
UNLABELLED Syphilis is a multistage sexually transmitted disease that remains a serious public health concern worldwide. The coexistence of Treponema pallidum with other closely related members of spirochaeta, such as Leptospira spp. and Borrelia burgdorferi, has complicated the serodiagnosis due to cross-reactive antigens. In this study, recombinant Tp0821 protein was expressed in Escherichia coli and purified by metal affinity chromatography. Then enzyme-linked immunosorbent assays (ELISAs) based on Tp0821 for the detection of specific antibodies were established. The relative positive rates of the IgM ELISA and the IgG ELISA were found to be 91·0 and 98·3%, respectively, when screening 578 syphilis specimens. The specificities were 94·3 and 100%, respectively, when cross-checking with serum samples obtained from 30 patients with Lyme disease, five patients with leptospirosis, and 52 uninfected controls. In addition, relative positive rates and specificities of Tp0821 for human sera were all 100% in Western blotting. When compared to the syphilis diagnostic tests commonly used in clinical settings, we found that the results of Tp0821-based ELISAs correlated well with the results of the treponemal tests, specifically the T. pallidum particle agglutination (TP-PA) test and the chemiluminescent immunoassay (CIA). Thus, these findings identify Tp0821 as a novel serodiagnostic candidate for syphilis. SIGNIFICANCE AND IMPACT OF THE STUDY In this study, we expressed and purified the Treponema pallidum protein Tp0821 and developed Tp0821-based enzyme-linked immunosorbent assays (ELISAs) for the detection of specific antibodies. The serodiagnostic performance of the recombinant protein was then evaluated. When compared to the results of syphilis diagnostic tests commonly used in clinical settings, we found that the reactivities of syphilitic sera with the recombinant antigen correlated well with the results of the treponemal tests, specifically the T. pallidum particle agglutination (TP-PA) test and the chemiluminescent immunoassay (CIA). Thus, the recombinant protein shows promise as a new diagnostic antigen in the ELISAs.
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Affiliation(s)
- Y Xie
- Institution of Pathogenic Biology, Medical College, University of South China, Hengyang, Hunan, China.,Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, Hunan, China.,Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, University of South China, Hengyang, Hunan, China
| | - M Xu
- Institution of Pathogenic Biology, Medical College, University of South China, Hengyang, Hunan, China.,Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, Hunan, China.,Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, University of South China, Hengyang, Hunan, China
| | - C Wang
- Institution of Pathogenic Biology, Medical College, University of South China, Hengyang, Hunan, China.,Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, Hunan, China.,Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, University of South China, Hengyang, Hunan, China
| | - J Xiao
- Clinical Laboratory Department, Hunan Provincial People's Hospital, Changsha, Hunan, China
| | - Y Xiao
- Institution of Pathogenic Biology, Medical College, University of South China, Hengyang, Hunan, China.,Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, Hunan, China.,Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, University of South China, Hengyang, Hunan, China.,Clinical Laboratory Department, The Second Affiliated Hospital of University of South China, Hengyang, Hunan, China
| | - C Jiang
- Institution of Pathogenic Biology, Medical College, University of South China, Hengyang, Hunan, China.,Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, Hunan, China.,Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, University of South China, Hengyang, Hunan, China
| | - X You
- Institution of Pathogenic Biology, Medical College, University of South China, Hengyang, Hunan, China.,Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, Hunan, China.,Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, University of South China, Hengyang, Hunan, China
| | - F Zhao
- Institution of Pathogenic Biology, Medical College, University of South China, Hengyang, Hunan, China.,Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, Hunan, China.,Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, University of South China, Hengyang, Hunan, China
| | - T Zeng
- Institution of Pathogenic Biology, Medical College, University of South China, Hengyang, Hunan, China.,Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, Hunan, China.,Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, University of South China, Hengyang, Hunan, China
| | - S Liu
- Clinical Laboratory Department, The First Affiliated Hospital of University of South China, Hengyang, Hunan, China
| | - X Kuang
- Institution of Pathogenic Biology, Medical College, University of South China, Hengyang, Hunan, China.,Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, Hunan, China.,Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, University of South China, Hengyang, Hunan, China
| | - Y Wu
- Institution of Pathogenic Biology, Medical College, University of South China, Hengyang, Hunan, China.,Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, Hunan, China.,Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, University of South China, Hengyang, Hunan, China
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15
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Xu M, Xie Y, Jiang C, Xiao Y, Kuang X, Zhao F, Zeng T, Liu S, Liang M, Li L, Wang C, Wu Y. A novel ELISA using a recombinant outer membrane protein, rTp0663, as the antigen for serological diagnosis of syphilis. Int J Infect Dis 2015; 43:51-57. [PMID: 26747418 DOI: 10.1016/j.ijid.2015.12.013] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2015] [Revised: 12/15/2015] [Accepted: 12/21/2015] [Indexed: 10/22/2022] Open
Abstract
BACKGROUND The lack of Treponema pallidum-specific antigens with highly accurate diagnosis makes the diagnosis of syphilis challenging. METHODS A soluble recombinant version of a new diagnostic protein Tp0663 has been produced. The serodiagnostic potential of this protein was assessed by screening 3326 serum samples simultaneously evaluated by rapid plasma reagin and T. pallidum particle agglutination tests. Kappa (κ) coefficients were used to compare the concordance between clinical diagnosis and the Tp0663-based ELISA or the ARCHITECT Syphilis TP chemiluminescent immunoassay (Abbott GmbH and Co. KG). RESULTS Using the results of clinical diagnosis as the gold standard, the sensitivity and specificity of Tp0663 were found to be 98.83% (95% confidence interval (CI) 96.61-99.60%) and 100% (95% CI 99.88-100%), respectively. In comparison, the ARCHITECT Syphilis TP assay was found to have a lower sensitivity (97.27%, 95% CI 94.46-98.67%) and specificity (99.61%, 95% CI 99.32-99.78%). In particular, the ARCHITECT Syphilis TP exhibited a false-positive rate of 0.39%. Moreover, the ELISA was in perfect agreement with the gold standard, with a κ value of 0.99, comparable to that of ARCHITECT Syphilis TP (0.96). CONCLUSION These results identified Tp0663 as a novel serodiagnostic candidate with great potential for developing novel tests for the diagnosis of syphilis.
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Affiliation(s)
- Man Xu
- Institution of Pathogenic Biology, Medical College, University of South China, Hengyang 421001, China; Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, China; Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, University of South China, Hengyang, China
| | - Yafeng Xie
- Institution of Pathogenic Biology, Medical College, University of South China, Hengyang 421001, China; Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, China; Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, University of South China, Hengyang, China
| | - Chuanhao Jiang
- Institution of Pathogenic Biology, Medical College, University of South China, Hengyang 421001, China; Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, China; Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, University of South China, Hengyang, China
| | - Yongjian Xiao
- Institution of Pathogenic Biology, Medical College, University of South China, Hengyang 421001, China; Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, China; Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, University of South China, Hengyang, China; Department of Clinical Laboratory, The Second Affiliated Hospital of University of South China, Hengyang, China
| | - Xingxing Kuang
- Institution of Pathogenic Biology, Medical College, University of South China, Hengyang 421001, China; Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, China; Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, University of South China, Hengyang, China
| | - Feijun Zhao
- Institution of Pathogenic Biology, Medical College, University of South China, Hengyang 421001, China; Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, China; Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, University of South China, Hengyang, China
| | - Tiebing Zeng
- Institution of Pathogenic Biology, Medical College, University of South China, Hengyang 421001, China; Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, China; Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, University of South China, Hengyang, China
| | - Shuangquan Liu
- Department of Clinical Laboratory, The First Affiliated Hospital of University of South China, Hengyang, China
| | - Mingxing Liang
- Institution of Pathogenic Biology, Medical College, University of South China, Hengyang 421001, China; Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, China; Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, University of South China, Hengyang, China
| | - Li Li
- Institution of Pathogenic Biology, Medical College, University of South China, Hengyang 421001, China; Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, China; Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, University of South China, Hengyang, China
| | - Chuan Wang
- Institution of Pathogenic Biology, Medical College, University of South China, Hengyang 421001, China; Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, China; Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, University of South China, Hengyang, China
| | - Yimou Wu
- Institution of Pathogenic Biology, Medical College, University of South China, Hengyang 421001, China; Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, China; Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, University of South China, Hengyang, China.
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16
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Evaluation of FlaB1, FlaB2, FlaB3, and Tp0463 of Treponema pallidum for serodiagnosis of syphilis. Diagn Microbiol Infect Dis 2015; 84:105-11. [PMID: 26607421 DOI: 10.1016/j.diagmicrobio.2015.10.005] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2015] [Revised: 09/30/2015] [Accepted: 10/04/2015] [Indexed: 10/22/2022]
Abstract
Syphilis is a multistage disease caused by the invasive spirochete Treponema pallidum subsp. pallidum, and accurate diagnosis is important for the prevention and treatment of syphilis. Here, to identify appropriate diagnostic antigens for serodiagnosis of syphilis, 6 recombinant proteins were expressed in Escherichia coli and purified, including flagellins (FlaB1 [Tp0868], FlaB2 [Tp0792], and FlaB3 [Tp0870]), Tp0463, Tp0751, and Tp1038. The sensitivities were determined by screening sera from individuals with primary (n=82), secondary (n=115), latent (n=105), and congenital (n=65) syphilis. The specificities were determined by screening sera from uninfected controls (n=30) and potentially cross-reactive infections including Lyme disease (n=30), leptospirosis (n=5), and hepatitis B (n=30). Our data showed that FlaB1, FlaB2, FlaB3, Tp0463, and Tp1038 exhibited higher overall sensitivities and specificities for detecting IgG antibody, with 95.4% and 98.9%, 92.6% and 95.8%, 95.1% and 95.8%, 92.6% and 97.9%, and 95.9% and 98.9%, respectively. In contrast, Tp0751 demonstrated only an overall sensitivity of 39.2%. For comparison, the sensitivity and specificity of Architect Syphilis TP were determined to be 98.1% and 93.7%, respectively. In addition, FlaB1, FlaB2, FlaB3, and Tp0463 demonstrated excellent performance for detecting IgM antibody in primary and congenital syphilis, with sensitivities of 76.8% and 83.1%, 72.0% and 87.7%, 74.4% and 89.2%, and 64.6% and 75.3%, respectively. These results indicate that FlaB1, FlaB2, FlaB3, and Tp0463 could be as novel diagnostic candidates for serodiagnosis of syphilis.
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17
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Huang NL, Ye L, Schneider ME, Du YX, Xu YH, Fan LB, Du WD. Development of a novel protein biochip enabling validation of immunological assays and detection of serum IgG and IgM antibodies against Treponema pallidum pathogens in the patients with syphilis. Biosens Bioelectron 2015; 75:465-71. [PMID: 26364122 DOI: 10.1016/j.bios.2015.08.036] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2015] [Revised: 08/05/2015] [Accepted: 08/18/2015] [Indexed: 01/03/2023]
Abstract
In this study, we developed a novel protein biochip methodology that was characterized by dithiobis (succinimidyl undecanoate) (DSU) and specialized for detection of serum IgG and IgM antibodies against Treponema pallidum pathogens in the patients with syphilis, respectively. The biochips were validated by a dimension of atomic force microscope (AFM). The visualized detection limit of IgG antibody on the biochip was 0.39μg/ml. Finally, 286 serum samples from the patients with syphilis were simultaneously tested on the rTpN15-17-47 coated biochips. The results were evaluated in comparison with the assays of T. pallidum particle agglutination (TPPA) and the toluidine red unheated serum test (TRUST). The result demonstrated that the relative positive rate in the 286 patients by biochip was 99.0%, similar to that by TPPA (97.9%, P>0.05) and higher than that by TRUST, (76.2%, P<0.01). The detection specificities were 100% for the biochip and the TPPA and 97.0% for the TRUST. Thus, the protein biochip would provide a useful platform not only for enabling concurrent detection of the infectious antibodies directed against T. pallidum on a larger scale, but also for monitoring therapy modality of the disease.
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Affiliation(s)
- Na-Li Huang
- Department of Biology, School of Life Sciences, Anhui Medical University, Hefei 230032, China
| | - Lei Ye
- Department of Biology, School of Life Sciences, Anhui Medical University, Hefei 230032, China
| | - Marion E Schneider
- Sektion Experimentelle Anaesthesiologie, Universitaetsklinikum Ulm, Ulm 89081, Germany
| | - Yi-Xin Du
- Sektion Experimentelle Anaesthesiologie, Universitaetsklinikum Ulm, Ulm 89081, Germany
| | - Yuan-Hong Xu
- Clinical Laboratory, the First Affiliated Hospital, Anhui Medical University, Hefei 230032, China
| | - Li-Bin Fan
- Department of Biology, School of Life Sciences, Anhui Medical University, Hefei 230032, China
| | - Wei-Dong Du
- Department of Biology, School of Life Sciences, Anhui Medical University, Hefei 230032, China; Sektion Experimentelle Anaesthesiologie, Universitaetsklinikum Ulm, Ulm 89081, Germany; Department of Pathology, Anhui Medical University, Hefei 230032, China.
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18
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Wang J, Zhao X, Yuan P, Fang T, Ouyang N, Li R, Ou S, Wang W. Clinical Outcomes of In Vitro Fertilization among Chinese Infertile Couples Treated for Syphilis Infection. PLoS One 2015. [PMID: 26208116 PMCID: PMC4514756 DOI: 10.1371/journal.pone.0133726] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
To compare the clinical outcomes of infertile patients with and without syphilis after in vitro fertilization and embryo transfer (IVF-ET), in this case-control study, 320 infertile couples were enrolled and divided into syphilis (n = 160) and control groups (n = 160). The primary IVF outcomes were the clinical pregnancy rate and the birth of a healthy baby. All syphilis patients received the standard anti-syphilis treatment before undergoing IVF/ICSI. Our results showed that the endometrial thickness of the syphilis group was greater than that of the control group following hCG injection (16.9±5.4 vs. 13.0±4.7 mm, P<0.001). The numbers of normally fertilized eggs and normally cleaved fertilized eggs and the implantation rate were 6.8±4.8, 6.3±4.7 and 24.2%, respectively, for the syphilis group and 8.3±4.6, 8.1±4.6 and 34.4%, respectively, for the control group, and these values were significantly different between the groups. The clinical pregnancy rate was lower in the syphilis group compared with that in the control group (43.8% vs. 55.6%, P = 0.03). Lower offspring birth weight was observed in the infected male group compared with those in the infected female (2.7±0.4 vs. 3.0±0.4 kg, P = 0.01) and infected couple groups (2.7±0.4 vs. 3.1±0.5 kg, P = 0.007). Therefore, syphilis infection reduces the clinical pregnancy rate after IVF/ICSI.
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Affiliation(s)
- Jing Wang
- Reproductive Medicine Center, Department of Obstetrics & Gynecology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, No. 107 Yanjiang Xi Road, Guangzhou 510120, P. R. China
| | - Xiaomiao Zhao
- Reproductive Medicine Center, Department of Obstetrics & Gynecology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, No. 107 Yanjiang Xi Road, Guangzhou 510120, P. R. China
| | - Ping Yuan
- Reproductive Medicine Center, Department of Obstetrics & Gynecology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, No. 107 Yanjiang Xi Road, Guangzhou 510120, P. R. China
| | - Tingfeng Fang
- Reproductive Medicine Center, Department of Obstetrics & Gynecology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, No. 107 Yanjiang Xi Road, Guangzhou 510120, P. R. China
| | - Nengyong Ouyang
- Reproductive Medicine Center, Department of Obstetrics & Gynecology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, No. 107 Yanjiang Xi Road, Guangzhou 510120, P. R. China
| | - Ruiqi Li
- Reproductive Medicine Center, Department of Obstetrics & Gynecology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, No. 107 Yanjiang Xi Road, Guangzhou 510120, P. R. China
| | - Songbang Ou
- Reproductive Medicine Center, Department of Obstetrics & Gynecology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, No. 107 Yanjiang Xi Road, Guangzhou 510120, P. R. China
| | - Wenjun Wang
- Reproductive Medicine Center, Department of Obstetrics & Gynecology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, No. 107 Yanjiang Xi Road, Guangzhou 510120, P. R. China
- * E-mail:
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Qiu XH, Zhang YF, Chen YY, Zhang Q, Chen FY, Liu L, Fan JY, Gao K, Zhu XZ, Zheng WH, Zhang HL, Lin LR, Liu LL, Tong ML, Zhang CG, Niu JJ, Yang TC. Evaluation of the boson chemiluminescence immunoassay as a first-line screening test in the ECDC algorithm for syphilis serodiagnosis in a population with a high prevalence of syphilis. J Clin Microbiol 2015; 53:1371-4. [PMID: 25631792 PMCID: PMC4365203 DOI: 10.1128/jcm.00069-15] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2015] [Accepted: 01/17/2015] [Indexed: 12/19/2022] Open
Abstract
We developed a new Boson chemiluminescence immunoassay (CIA) and evaluated its application with cross-sectional analyses. Our results indicated that the Boson CIA demonstrated strong discriminatory power in diagnosing syphilis and that it can be used as a first-line screening test for syphilis serodiagnosis using the European Centre for Disease Prevention and Control algorithm or as a confirmatory test when combined with a patient's clinical history.
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Affiliation(s)
- Xin-Hui Qiu
- Zhongshan Hospital, Medical College of Xiamen University, Xiamen, China
| | - Ya-Feng Zhang
- Zhongshan Hospital, Medical College of Xiamen University, Xiamen, China
| | - Yu-Yan Chen
- Zhongshan Hospital, Medical College of Xiamen University, Xiamen, China
| | - Qiao Zhang
- Zhongshan Hospital, Medical College of Xiamen University, Xiamen, China
| | - Fu-Yi Chen
- Department of Physiology and Neurobiology, University of Connecticut, Storrs, Connecticut, USA
| | - Long Liu
- Department of Chemistry and Biology, College of Science, National University of Defense and Technology, Changsha, China
| | - Jin-Yi Fan
- Zhongshan Hospital, Medical College of Xiamen University, Xiamen, China
| | - Kun Gao
- Zhongshan Hospital, Medical College of Xiamen University, Xiamen, China
| | - Xiao-Zhen Zhu
- Zhongshan Hospital, Medical College of Xiamen University, Xiamen, China
| | - Wei-Hong Zheng
- Zhongshan Hospital, Medical College of Xiamen University, Xiamen, China
| | - Hui-Lin Zhang
- Zhongshan Hospital, Medical College of Xiamen University, Xiamen, China
| | - Li-Rong Lin
- Zhongshan Hospital, Medical College of Xiamen University, Xiamen, China
| | - Li-Li Liu
- Zhongshan Hospital, Medical College of Xiamen University, Xiamen, China
| | - Man-Li Tong
- Zhongshan Hospital, Medical College of Xiamen University, Xiamen, China
| | | | - Jian-Jun Niu
- Zhongshan Hospital, Medical College of Xiamen University, Xiamen, China
| | - Tian-Ci Yang
- Zhongshan Hospital, Medical College of Xiamen University, Xiamen, China ShenZhen Research Institute of Xiamen University, ShenZhen, China
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Runina AV, Rog KV, Vasilev MM. ТрF1 - a new potential antigen for serological diagnostics of latent forms of syphilis. VESTNIK DERMATOLOGII I VENEROLOGII 2014. [DOI: 10.25208/0042-4609-2014-90-6-86-92] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022] Open
Abstract
The current diagnostics of sexually transmitted diseases is focused on the search for new diagnostically important antigens, especially antigens of T. pallidum that causes syphilis. This article describes the recovery of the recombinant protein TpF1, a cytoplasmic bacterioferritin of T. pallidum, and a study of its immunogenicity in blood serum samples taken from patients with different forms of syphilis and from healthy volunteers. The authors performed a heterologous expression of the TpF1 protein in E. coli cells and purified the recovered TpF1 by means of metal-chelate affinity chromatography. The recombinant TpF1 was further used as an antigen for the determination of specific IgG for this protein in serum samples taken from patients suffering from primary, secondary and early/late latent forms of syphilis. According to the study results, anti-TpF1 antibodies are present at all stages of syphilis yet the level of such antibodies revealed in the groups of patients suffering from secondary, early and late latent forms of syphilis was statistically significantly different from the level of antibodies in the group of healthy volunteers. The greatest difference was observed in the groups of latent syphilis. These data characterize the TpF1 protein as a promising antigen for the diagnostics of syphilis, and TpF1 can also be considered as a potential antigen for the differential diagnostics of latent forms of syphilis.
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Nie XM, Huang R, Dong CX, Tang LJ, Gui R, Jiang JH. Plasmonic ELISA for the ultrasensitive detection of Treponema pallidum. Biosens Bioelectron 2014; 58:314-9. [DOI: 10.1016/j.bios.2014.03.007] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2014] [Revised: 03/02/2014] [Accepted: 03/03/2014] [Indexed: 10/25/2022]
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