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Wang L, Fu B, Xiang Z, Chen X, Chen J, Qin Y, Sheng H, Zhou X, Li Q, Huang B. Establishment of growth stimulating gene 2 protein time-resolved fluorescence immunoassay and its application in sepsis. J Immunol Methods 2023; 520:113534. [PMID: 37558124 DOI: 10.1016/j.jim.2023.113534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Revised: 06/19/2023] [Accepted: 08/05/2023] [Indexed: 08/11/2023]
Abstract
AIM This study aimed to establish a highly sensitive time-resolved fluorescence immunoassay of growth stimulating express gene 2 protein (ST2-TRFIA) and evaluate its application value for sepsis. METHODS Two types of ST2 monoclonal specific antibodies against different epitopes of antigen molecule were used as coating and Eu3+-labeled antibodies. The double-antibody sandwich method was used in establishing ST2-TRFIA, and the methodology was evaluated. The established ST2-TRFIA was used in detecting ST2 concentration in the plasma samples of healthy controls and sepsis. RESULTS The linear range of ST2-TRFIA was 1.446-500 ng/mL. Plasma ST2 concentrations detected through ST2-TRFIA were consistent with the results of fluorescence quantitative immunochromatography (ρ = 0.946). The plasma ST2 concentrations of patients with sepsis were significantly higher than those of healthy controls (P < 0.01). CONCLUSION This study successfully established a highly sensitive ST2-TRFIA, which was highly comparable to commercially available fluorescent quantitative immunochromatographic kits and can facilitate the timely diagnosis of sepsis.
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Affiliation(s)
- Lu Wang
- College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, China
| | - Benqi Fu
- Sichuan Friendship Hospital, Chengdu, China
| | - Zhongyi Xiang
- College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, China
| | - Xindong Chen
- College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, China
| | - Jianye Chen
- College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, China
| | - Yuan Qin
- College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, China
| | - Huiming Sheng
- Tong Ren Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xiumei Zhou
- College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, China.
| | - Qian Li
- Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou, China.
| | - Biao Huang
- College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, China.
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2
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Sun Y, Su M, Wang M, Zhang R, Wang S, Tan J, Jia Q, Li H, Meng Z. Establishment and analytical performance of light-initiated chemiluminescence assay method for detecting thyrotropin receptor antibody. Biomark Med 2023; 17:349-357. [PMID: 37338244 DOI: 10.2217/bmm-2022-0666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/21/2023] Open
Abstract
Aim: To evaluate double-antibody competitive light-initiated chemiluminescence assay method for detecting the thyrotropin receptor antibody. Materials & methods: The optimal working concentrations of competitive antibody and rTSHR were confirmed by checkerboard titration. Assay performance was assessed by precision, linearity, accuracy, limit of blank and clinical evaluation. Results: The coefficient of variation for repeatability and intermediate precision was 3.9-5.9 and 0.9-1.3%, respectively. The correlation coefficient was 0.999 by least squares linear fitting in linearity evaluation. The relative deviation ranged from -5.9 to 4.1%, and the limit of blank of the method was 0.13 IU/l. Compared with the Roche cobas system (Roche Diagnostics, Mannheim, Germany), the relationship between the two assays was shown to be significantly correlative. Conclusion: The light-initiated chemiluminescence assay method for detecting thyrotropin receptor antibody is a rapid, novel and accurate method for thyrotropin receptor antibody measurement.
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Affiliation(s)
- Ying Sun
- Department of Clinical Laboratory, Tianjin Medical University General Hospital, Tianjin, 300052, People's Republic of China
| | - Mengxue Su
- Department of Nuclear Medicine, Tianjin Medical University General Hospital, Tianjin, 300052, People's Republic of China
| | - Miao Wang
- Department of Nuclear Medicine, Tianjin Medical University Second Hospital, Pingjiang Road, No. 23, Hexi District, Tianjin, 300211, People's Republic of China
| | - Ruyi Zhang
- Department of Nuclear Medicine, Tianjin Medical University General Hospital, Tianjin, 300052, People's Republic of China
| | - Shen Wang
- Department of Nuclear Medicine, Tianjin Medical University General Hospital, Tianjin, 300052, People's Republic of China
| | - Jian Tan
- Department of Nuclear Medicine, Tianjin Medical University General Hospital, Tianjin, 300052, People's Republic of China
| | - Qiang Jia
- Department of Nuclear Medicine, Tianjin Medical University General Hospital, Tianjin, 300052, People's Republic of China
| | - Huiqiang Li
- School of Medical Laboratory, Tianjin Medical University, Tianjin, 300203, People's Republic of China
| | - Zhaowei Meng
- Department of Nuclear Medicine, Tianjin Medical University General Hospital, Tianjin, 300052, People's Republic of China
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3
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Development of amplified luminescent proximity homogeneous assay for quantitation of gastrin-17. Anal Biochem 2023; 662:115016. [PMID: 36502889 DOI: 10.1016/j.ab.2022.115016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Accepted: 12/07/2022] [Indexed: 12/14/2022]
Abstract
A highly sensitive and convenient amplified luminescent proximity homogeneous assay (AlphaLISA) method with high throughput and automation potential was developed for quantitation of serum Gastrin-17 (G-17) levels, which can facilitate the early diagnosis of atrophic gastritis in people at high risk of gastric cancer using a non-invasive approach. In this study, donor and acceptor beads with modified carboxyl groups on the surface were directly coupled to anti-G-17 antibodies through activation was proposed for application in the development of the new AlphaLISA, which can effectively simplify the steps and shorten the reaction time to achieve faster detection. Therefore, the G-17-AlphaLISA only needs to react for 15 min to obtain good analysis results. The proposed method has a wider detection range than commercial enzyme-linked immunosorbent assay (ELISA) kits (0.12-112.8 pmol/L > 0.5-40 pmol/L). In addition, results of G-17-AlphaLISA and ELISA had good correlation and agreement (ρ = 0.936). Importantly, the developed method may be more suitable for the large-scale screening of people at high risk for gastric cancer than traditional ELISA and provides a novel solution for other biomarkers that require accurate, highly sensitive, and high throughput detection.
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Zhang B, Lv S, Qiang Z, Guo M, Tan X, Li H, Yu Y. Improved Sensitivity and Wide Range Detection of Small Analytes Using a Two-Antigen-Combined Competitive Immunoassay. ACS OMEGA 2022; 7:48121-48129. [PMID: 36591119 PMCID: PMC9798763 DOI: 10.1021/acsomega.2c06126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Accepted: 12/02/2022] [Indexed: 06/17/2023]
Abstract
Competitive immunoassays have unique advantages in the detection of small molecules and are widely used in clinical practice. However, the concentrations of some analytes usually vary greatly among different populations, which makes it difficult to balance the sensitivity and detection range of competitive immunoassays. Studies have shown that using haptens with weaker affinity for specific antibodies as competitive antigens can help improve the sensitivity of the method. Here, we developed a competitive light initiated chemiluminescence assay based on the combination of antigens with different affinities, which has high sensitivity and wide detection range. As a proof of concept, estradiol was used as the analyte. After the mixing ratio was optimized, the two labeled haptens played different competitive roles due to the different concentrations of estradiol to be tested, which improved the sensitivity of estradiol detection, while ensuring a certain detection range. The limit of detection of this method was 5.30 pg/mL, which is lower than most current estradiol immunoassay kits. Good linearity (R 2 = 0.9902) was obtained between estradiol concentrations of 17.07-2376.22 pg/mL. This study provides a new solution for the detection of small molecule biomarkers with a large concentration span, which also has considerable potential in other immunological detection methods.
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Affiliation(s)
- Bei Zhang
- Department
of Clinical Immunology, School of Medical Laboratory, Tianjin Medical University, Tianjin300203, China
| | - Shuxing Lv
- Department
of Medical Laboratory, Tianjin Academy of
Traditional Chinese Medicine Affiliated Hospital, Tianjin300120, China
| | | | - Miao Guo
- Department
of Medical Laboratory, Tianjin Hexi Obstetrics
and Gynecology Hospital, Tianjin300203, China
| | - Xin Tan
- Department
of Clinical Immunology, School of Medical Laboratory, Tianjin Medical University, Tianjin300203, China
| | - Huiqiang Li
- Department
of Clinical Immunology, School of Medical Laboratory, Tianjin Medical University, Tianjin300203, China
| | - Yang Yu
- Department
of Clinical Immunology, School of Medical Laboratory, Tianjin Medical University, Tianjin300203, China
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Xiang Z, Chen X, Zhou X, Qin Y, Zhao X, Wang Y, Li Q, Huang B. Development and application of a novel aldehyde nanoparticle-based amplified luminescent proximity homogeneous assay for rapid quantitation of pancreatic stone protein. Clin Chim Acta 2022; 535:120-130. [PMID: 36030885 DOI: 10.1016/j.cca.2022.08.020] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Revised: 08/04/2022] [Accepted: 08/20/2022] [Indexed: 11/25/2022]
Abstract
BACKGROUND Timely diagnosis of bacterial infections is important to prevent sepsis. Classical infection biomarkers have some flaws, and common detection methods are time-consuming. Thus, we aimed to establish an efficient detection method that precisely detects pancreatic stone protein (PSP) in human plasma for the timely diagnosis of bacterial infections. METHODS Based on the novel amplified luminescent proximity homogeneous assay (AlphaLISA) method, donor and acceptor beads modified with aldehyde groups were directly coupled to the anti-PSP antibodies. PSP was quickly detected by a double-antibody sandwich method. Plasma samples from healthy individuals, bacterially infected patients, and acute-phase response patients were tested. RESULTS The detection time of the developed method is only 5 min. The results of PSP-AlphaLISA and time-resolved fluorescence were consistent (ρ = 0.9722). The plasma PSP levels of patients with bacterial infection were significantly higher than those of acute-phase response patients and healthy individuals (P < 0.05). PSP levels in patients with bacterial infection with sepsis were significantly higher than those in patients with bacterial infection without sepsis (P < 0.05). CONCLUSIONS The PSP-AlphaLISA exhibited excellent performance and may be applied to the differential diagnosis between bacterial infection and sepsis in patients without interference from patients with acute-phase response.
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Affiliation(s)
- Zhongyi Xiang
- College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, China
| | - Xindong Chen
- College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, China
| | - Xiumei Zhou
- College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, China
| | - Yuan Qin
- College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, China
| | - Xueqin Zhao
- College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, China
| | - Yigang Wang
- College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, China
| | - Qian Li
- Zhejiang Provincial People's Hospital (Affiliated People's Hospital, Hangzhou Medical College), Hangzhou, China.
| | - Biao Huang
- College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, China.
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6
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Xiang Z, Zhang Z, Chen X, Zhang L, Zhou X, Qin Y, Zhao X, Wang Y, Huang B, Tang H. Development and application of amplified luminescent proximity homogeneous assay for quantitation of heparin-binding protein. Anal Biochem 2022; 657:114906. [PMID: 36152874 DOI: 10.1016/j.ab.2022.114906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Revised: 09/09/2022] [Accepted: 09/13/2022] [Indexed: 11/29/2022]
Abstract
A fast and highly sensitive amplified luminescent proximity homogeneous assay (AlphaLISA) method was developed for quantitation of plasma heparin-binding protein levels. In this study, a method directly coupling donor and acceptor beads modified with aldehyde groups to anti-HBP antibodies was proposed, which can effectively simplify the steps and shorten the reaction time to achieve faster detection. Therefore, the developed method required only 15 min of reaction time to generate results. Compared with the approved commercial kit, the developed method had a wider linear range (2.78-500 ng/mL). The excellent linear range means that the method can better exploit the value of HBP in clinical applications. Meanwhile, results of amplified luminescent proximity homogeneous assay and fluorescence dry quantitative immunoassay had good correlation and consistency (ρ = 0.9181). Moreover, the plasma HBP concentrations of patients with bacterial infection were significantly higher than those of healthy individuals (P < 0.0001), indicating the potential applicability of the proposed method for predicting the incidence of bacterial infections. Importantly, the newly developed method is expected to serve as an alternative to the traditional assay method and provides a completely new platform for other biomarkers that require rapid detection.
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Affiliation(s)
- Zhongyi Xiang
- College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, China
| | - Zhibin Zhang
- Clinical Laboratory, Wuxi Hospital of Traditional Chinese Medicine, Wuxi, China
| | - Xindong Chen
- College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, China
| | - Lele Zhang
- Clinical Laboratory Medicine, Second Affiliated Hospital of Zhejiang University School of Medicine, China
| | - Xiumei Zhou
- College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, China
| | - Yuan Qin
- College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, China
| | - Xueqin Zhao
- College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, China
| | - Yigang Wang
- College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, China
| | - Biao Huang
- College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, China.
| | - Huqiang Tang
- Clinical Laboratory Medicine, Second Affiliated Hospital of Zhejiang University School of Medicine, China.
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Shang C, Yuan X, Lin H, Liu D, Yan X, Ren X, Lin X, Di H, Li H. Light-initiated chemiluminescent assay of 17β-estradiol metrological traceability system established by manufacturer according to ISO17511:2020 and basic performance evaluation performed by clinical end-users. J Clin Lab Anal 2022; 36:e24436. [PMID: 35471729 PMCID: PMC9169207 DOI: 10.1002/jcla.24436] [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: 02/07/2022] [Revised: 03/18/2022] [Accepted: 04/04/2022] [Indexed: 11/22/2022] Open
Abstract
Background In order to ensure the accuracy of the product, we established 1st model of metrological traceability hierarchy for light‐initiated chemiluminescent assay (LICA) of 17β‐estradiol (E2) at the manufacturer, based on International Organization for Standardization (ISO) 17511:2020. Moreover, we verified/validated the basic performance (such as matrix effect and long‐term stability of end‐user IVD MD calibrator, precision, linearity interval, accuracy/ trueness, and detection capability) at the clinical end‐user. Methods Human serum samples were used in this study. E2 was detected by mass spectrometry (MS) and LICA. The metrological traceability of LICA for E2 was established according to ISO 17511: 2020 standards, and pools of human samples were used as the m.3. secondary calibrator. Precision was validated according to Clinical and Laboratory Standards Institute (CLSI) EP05‐A3. The linear interval was verified according to CLSI EP06‐ED2. Comparison of accuracy and trueness of E2 with MS and Roche according to CLSI EP09‐A3. The detection capability was validated according to EP17‐A2. Matrix effect and long‐term stability evaluation of end‐user IVD MD calibrator were carried out according to CLSI EP14‐A2, EP25‐A. Statistical software was used for data analyses. Results The use of pools of human samples and fine adjusting calibrators ensured the accuracy of end‐user test results. The metrological traceability of LICA for E2 was established. It showed excellent precision, meeting the requirements of allowable imprecision (7.5%). The allowable deviation from linearity (ADL) of 5% was allowed to show a good linear interval (12.52–4167.25 pg/ml). The accuracy/ trueness was verified, and relative deviation in the medical decision level met the performance specification of 10.03% compared with MS or Roche. The validated limit of blank, limit of detection, and limit of quantitation of E2 were 4.95 pg/ml, 8.93 pg/ml, and 9.88 pg/ml, respectively (the allowed imprecision is 20.00%). The interference rate of E2 ranged from −5.5% to 6.6%. Conclusion LICA showed high sensitivity, high specificity, excellent precision, wide linearity interval, IVD MD calibrator has long‐term stability, and no matrix effect. The metrological traceability of E2 established by using pools of human samples as M.3. can deliver accuracy to the end‐user IVD MD and show good consistency with MS and Roche.
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Affiliation(s)
- Chenyu Shang
- Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Xue Yuan
- The Second Hospital of Tianjin Medical University, Tianjin, China
| | - Haibiao Lin
- Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Dongdong Liu
- Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Xiaoxin Yan
- Standardization & Performance Evaluation Laboratory, Chemclin Diagnostics Co. Ltd, Beijing, China
| | - Xinxin Ren
- Standardization & Performance Evaluation Laboratory, Chemclin Diagnostics Co. Ltd, Beijing, China
| | - Xiyang Lin
- Standardization & Performance Evaluation Laboratory, Chemclin Diagnostics Co. Ltd, Beijing, China
| | - Huang Di
- Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Huiqiang Li
- Department of Clinical Immunology, School of Medical Laboratory, Tianjin Medical University, Tianjin, China
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8
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Zhang B, Guo M, Zhang T, Liu D, Tan X, Li X, Yu Y, Li H. A new method for broadening the detection range of immunoassay and its application in β-hCG quantitative detection. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2022; 14:1515-1522. [PMID: 35348568 DOI: 10.1039/d2ay00220e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Early pregnancy prediction requires very high β-hCG detection sensitivity, while embryonic development monitoring and trophoblastic disease detection require a wider detection range. In this study, based on light-initiated chemiluminescence assay (LICA), one high-affinity mAb and one low-affinity mAb were selected and coated on chemibeads with a larger coating area in different ratios to immobilize the antibodies. The two immobilized mAbs were mixed with different concentrations to detect β-hCG. When the high-affinity mAb-coated chemibeads and low-affinity mAb-coated chemibeads were used at working concentrations of 0.100 mg mL-1 and 0.014 mg mL-1, respectively, the sensitivity and detection range were maximized. The assay was precise for measuring β-hCG with repeatability and intermediate precision of <5% CV. The assay has a high sensitivity with a limit of quantification (LoQ) of 0.49 IU L-1, which is lower than that of most β-hCG detection kits. Over the range of 1 IU L-1 to 16 000 IU L-1, the assay had a proper linearity (r = 0.9995). No false negative results due to the hook effect were observed at β-hCG concentrations up to 225 000 IU L-1. The assay showed a good correlation with the Abbott assay (r = 0.9910). LICA combined with immobilized mAbs with different affinities ensures the sensitivity of β-hCG detection and broadens the detection range.
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Affiliation(s)
- Bei Zhang
- Department of Clinical Immunology, School of Medical Laboratory, Tianjin Medical University, Tianjin 300203, China.
| | - Miao Guo
- Department of Clinical Immunology, School of Medical Laboratory, Tianjin Medical University, Tianjin 300203, China.
| | - Tianjie Zhang
- Department of Clinical Immunology, School of Medical Laboratory, Tianjin Medical University, Tianjin 300203, China.
| | - Dandan Liu
- Department of Clinical Immunology, School of Medical Laboratory, Tianjin Medical University, Tianjin 300203, China.
| | - Xin Tan
- Department of Clinical Immunology, School of Medical Laboratory, Tianjin Medical University, Tianjin 300203, China.
| | - Xue Li
- Department of Clinical Immunology, School of Medical Laboratory, Tianjin Medical University, Tianjin 300203, China.
| | - Yang Yu
- Department of Clinical Immunology, School of Medical Laboratory, Tianjin Medical University, Tianjin 300203, China.
| | - Huiqiang Li
- Department of Clinical Immunology, School of Medical Laboratory, Tianjin Medical University, Tianjin 300203, China.
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Functional Nanomaterials Based Opto-Electrochemical Sensors for the Detection of Gonadal Steroid Hormones. Trends Analyt Chem 2022. [DOI: 10.1016/j.trac.2022.116571] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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10
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Chen K, Wu D, Gao M, Yan Y, Li H. Performance characteristics of the light-initiated chemiluminescent assay for quantitative determination of progesterone. ANNALS OF TRANSLATIONAL MEDICINE 2021; 9:1411. [PMID: 34733963 PMCID: PMC8506739 DOI: 10.21037/atm-21-3119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Accepted: 08/26/2021] [Indexed: 11/06/2022]
Abstract
Background To study the performance of quantitative determination of progesterone by light-initiated chemiluminescent assay (LICA). Methods Clinical samples of serum were used for detection of progesterone by LICA. The precision study was performed according to Clinical and Laboratory Standards Institute (CLSI) EP15-A3, the linear range validation was performed according to CLSI EP06-A, accuracy was evaluated according to CLSI EP9-A3, and the performance of detection capability was confirmed according to CLSI EP17-A2. All data were analyzed using SPSS software. Function regression analysis was performed by OriginPro software. Results The LICA-800 system exhibited low coefficients of variation (CVs) and high reproducibility, and the calculated synthetic CV was 2.16%. The access progesterone assay showed excellent linearity in the assay measuring range (0.37–40 ng/mL) using the polynomial regression method in accordance with CLSI EP06-A. Bias assessment was used to verify accuracy, and the percentage deviation met the quality requirements of the laboratory’s allowable deviation of 10.00%. In terms of the detection capability of LICA, the calculated limit of blank (LoB) was 0.046 ng/mL, limit of detection (LoD) was 0.057 ng/mL, and the limit of quantitation (LoQ) value was 0.161 ng/mL. Conclusions The competitive LICA provided a highly sensitive, accurate and precise method for measuring serum progesterone level.
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Affiliation(s)
- Kai Chen
- Department of Clinical Laboratory, Tianjin Beichen Hospital, Tianjin, China
| | - Dan Wu
- Department of Clinical Laboratory, Tianjin Beichen Hospital, Tianjin, China
| | - Mengdan Gao
- Department of Clinical Laboratory, Tianjin Beichen Hospital, Tianjin, China
| | - Yongfeng Yan
- Department of Clinical Laboratory, Tianjin Beichen Hospital, Tianjin, China
| | - Huiqiang Li
- Department of Clinical Immunology, School of Medical Laboratory, Tianjin Medical University, Tianjin, China
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Sun G, Xue J, Li L, Li X, Cui Y, Qiao B, Wei D, Li H. Quantitative determination of human serum testosterone via isotope dilution ultra‑performance liquid chromatography tandem mass spectrometry. Mol Med Rep 2020; 22:1576-1582. [PMID: 32626990 PMCID: PMC7339657 DOI: 10.3892/mmr.2020.11235] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2019] [Accepted: 05/21/2020] [Indexed: 12/03/2022] Open
Abstract
Quantification of testosterone serves an important role in the differential diagnosis of androgen-related endocrine diseases. Mass spectrometry exhibits higher accuracy and lower variability than immunoassays, especially at low testosterone concentrations. The present study developed and validated an isotope dilution ultra-performance liquid chromatography tandem mass spectrometry method for determination of human serum testosterone. The serum was equilibrated with an isotopic internal standard and treated with acidic buffer to release hormones from their binding proteins. Testosterone was extracted via two serial liquid-liquid extractions. In the first stage, the lipid fractions from an acidic buffer solution were isolated using ethyl acetate and n-hexane. The organic phase was evaporated and reconstituted in a basic buffer solution. In the second stage, the polar impurities of n-hexane extraction were removed. Total testosterone in serum was quantified via ultra-performance liquid chromatography tandem mass spectrometry in multiple reaction monitoring mode with positive electrospray ionization. The coefficient of variation of the method for intra- and inter-assay was 2.13% (1.40–2.77%) and 3.44% (3.06–3.66%), respectively. The recovery ranged from 94.32 to 108.60% for different samples. The limit of detection was 0.50 ng/dl and the linear range was from 1.00 to 1,000.00 ng/dl. In addition, the extraction efficiency in three different levels of quality control of the serum ranged from 85.02 to 93.29%. Moreover, structural analogues were investigated and were not indicated to affect the quantification of testosterone. The present method may enable quantification of testosterone in a clinical setting with high precision and accuracy.
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Affiliation(s)
- Guang Sun
- Department of Clinical Immunology, School of Medical Laboratory, Tianjin Medical University, Hexi, Tianjin 300203, P.R. China
| | - Jinmei Xue
- School of Chemical Engineering and Technology, Tianjin University, Jinnan, Tianjin 300350, P.R. China
| | - Liuxu Li
- Department of Clinical Immunology, School of Medical Laboratory, Tianjin Medical University, Hexi, Tianjin 300203, P.R. China
| | - Xue Li
- Department of Clinical Immunology, School of Medical Laboratory, Tianjin Medical University, Hexi, Tianjin 300203, P.R. China
| | - Yaqiong Cui
- Department of Clinical Immunology, School of Medical Laboratory, Tianjin Medical University, Hexi, Tianjin 300203, P.R. China
| | - Bin Qiao
- School of Chemical Engineering and Technology, Tianjin University, Jinnan, Tianjin 300350, P.R. China
| | - Dianjun Wei
- Department of Clinical Laboratory, Hebei Yanda Hospital, Yanda International Health City, Sanhe, Hebei 065201, P.R. China
| | - Huiqiang Li
- Department of Clinical Immunology, School of Medical Laboratory, Tianjin Medical University, Hexi, Tianjin 300203, P.R. China
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12
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Chen X, Yang R, Liang Y, Yuan T, Zhou J, Wang T, Cui L. Comparison and evaluation of Abbott chemiluminescent microparticle immunoassay and ChIVD light-initiated chemiluminescent assay in the detection of Treponema pallidum antibody. J Clin Lab Anal 2020; 34:e23275. [PMID: 32133697 PMCID: PMC7370704 DOI: 10.1002/jcla.23275] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2019] [Revised: 02/10/2020] [Accepted: 02/12/2020] [Indexed: 01/11/2023] Open
Abstract
Background Laboratory tests play an important role in the diagnosis of syphilis. This study aimed to compare and assess the performance of the Abbott chemiluminescent microparticle immunoassay (CMIA) and the ChIVD light‐initiated chemiluminescent assay (LICA) in the detection of Treponema pallidum (TP) antibody. Methods A total of 10 498 serum samples were detected with two assays, and the Treponema pallidum particle agglutination assay (TPPA) and recombinant immunoblot assay (RIBA) methods were used for confirmation. The sensitivity, specificity, positive predictive value, and negative predictive value of the Abbott CMIA and ChIVD LICA were calculated. The coincidence rate between two assays was also evaluated. The causes of false positive and false negative of two assays were studied. Results For the Abbott CMIA and ChIVD LICA, the sensitivity was 94.44% and 98.15%, the specificity was 99.89% and 99.81%, the positive predictive value was 93.29% and 88.83%, and the negative predictive value was 99.91% and 99.97%, respectively. The coincidence rate between Abbott CMIA and ChIVD LICA was 99.26%, and κ value was .790. The disease of infertility, hypertensive disease, liver disease, and cancer were the common causes of false positive in both assays, while infertility was also the main reason lead to false negative. Conclusion Our results demonstrated that the Abbott CMIA and ChIVD LICA generally had high sensitivity and specificity and therefore may be suitable for the detection of TP antibody and screening for syphilis.
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Affiliation(s)
- Xiaohui Chen
- Department of Laboratory Medicine, Peking University Third Hospital, Beijing, China
| | - Ruifeng Yang
- Beijing Key Laboratory of Hepatitis C and Immunotherapy for Liver Diseases, Peking University Hepatology Institute, Peking University People's Hospital, Beijing, China
| | - Yongming Liang
- Department of Laboratory Medicine, Peking University Third Hospital, Beijing, China
| | - Teng Yuan
- Department of Laboratory Medicine, Peking University Third Hospital, Beijing, China
| | - Jiansuo Zhou
- Department of Laboratory Medicine, Peking University Third Hospital, Beijing, China
| | - Tiancheng Wang
- Department of Laboratory Medicine, Peking University Third Hospital, Beijing, China
| | - Liyan Cui
- Department of Laboratory Medicine, Peking University Third Hospital, Beijing, China
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Yang R, Cui L, Liu Y, Cong X, Fei R, Wu S, Wei L. A hook-effect-free homogeneous light-initiated chemiluminescence assay: is it reliable for screening and the quantification of the hepatitis B surface antigen? ANNALS OF TRANSLATIONAL MEDICINE 2020; 8:606. [PMID: 32566632 PMCID: PMC7290535 DOI: 10.21037/atm.2020.02.59] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Background Hepatitis B virus (HBV) infection remains a threat to global public health. As a hallmark of HBV infection, hepatitis B surface antigen (HBsAg) has been used to screen for HBV infection for decades, and quantitative assays are also being clinically rejuvenated to predict the disease outcome and monitor the antiviral response. Herein, we developed and evaluated a hook-effect-free homogeneous quantitative HBsAg assay based on the light-initiated chemiluminescence immunoassay (LICA). Methods A hook-effect-free LICA algorithm was established by measuring the relative light units (RLUs) of two time points during the immunoreaction. The precision was assessed using low- and high-level controls. Consecutive clinical serum samples were tested using the LICA and Abbott Architect assay; samples producing inconsistent results were retested using supplementary assays including the HBsAg neutralization, HBV DNA, and Roche Elecsys HBsAg assays for further confirmation. The consistency, sensitivity, specificity, and positive and negative predictive values (PPV and NPV) were calculated. For the quantitative results, the correlation was analyzed. The coverage of different genotypes and mutations by the LICA was evaluated. Moreover, serial on-treatment and follow-up samples from chronic hepatitis B patients were also measured using the two assays. Results The LICA had better within-run and within-laboratory precisions than the Architect assay. In total, 5,176 clinical samples were tested. The two assays showed a consistency of 99.63%. The LICA showed greater specificity (99.95% vs. 99.77%) and PPV (99.75% vs. 98.77%) than the Architect assay, whereas the Architect assay showed greater sensitivity (100.00% vs. 99.01%) and NPV (100.00% vs. 99.82%). The two assays displayed an excellent correlation independent of genotypes and mutations. The LICA hook-free algorithm recognized 100% of the underestimated results. Furthermore, similar HBsAg dynamics were demonstrated using the LICA and Architect HBsAg assay. Conclusions The hook-free LICA provides a reliable tool for screening for HBV infection and quantifying HBsAg.
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Affiliation(s)
- Ruifeng Yang
- Peking University People's Hospital, Peking University Hepatology Institute, Beijing Key Laboratory of Hepatitis C and Immunotherapy for Liver Diseases, Beijing International Cooperation Base for Science and Technology on NAFLD Diagnosis, Beijing 100044, China
| | - Liyan Cui
- Department of Clinical Laboratory, Peking University Third Hospital, Beijing 100191, China
| | - Yan Liu
- Peking University People's Hospital, Peking University Hepatology Institute, Beijing Key Laboratory of Hepatitis C and Immunotherapy for Liver Diseases, Beijing International Cooperation Base for Science and Technology on NAFLD Diagnosis, Beijing 100044, China
| | - Xu Cong
- Peking University People's Hospital, Peking University Hepatology Institute, Beijing Key Laboratory of Hepatitis C and Immunotherapy for Liver Diseases, Beijing International Cooperation Base for Science and Technology on NAFLD Diagnosis, Beijing 100044, China
| | - Ran Fei
- Peking University People's Hospital, Peking University Hepatology Institute, Beijing Key Laboratory of Hepatitis C and Immunotherapy for Liver Diseases, Beijing International Cooperation Base for Science and Technology on NAFLD Diagnosis, Beijing 100044, China
| | - Shuping Wu
- Peking University People's Hospital, Peking University Hepatology Institute, Beijing Key Laboratory of Hepatitis C and Immunotherapy for Liver Diseases, Beijing International Cooperation Base for Science and Technology on NAFLD Diagnosis, Beijing 100044, China
| | - Lai Wei
- Peking University People's Hospital, Peking University Hepatology Institute, Beijing Key Laboratory of Hepatitis C and Immunotherapy for Liver Diseases, Beijing International Cooperation Base for Science and Technology on NAFLD Diagnosis, Beijing 100044, China
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Li J, Li L, Bian Y, Yu Y, Qiang Z, Zhang Y, Li H. Quantitation of estradiol by competitive light-initiated chemiluminescent assay using estriol as competitive antigen. J Clin Lab Anal 2019; 34:e23014. [PMID: 31444844 PMCID: PMC6977107 DOI: 10.1002/jcla.23014] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2019] [Revised: 07/28/2019] [Accepted: 07/30/2019] [Indexed: 12/12/2022] Open
Abstract
Background Light‐initiated chemiluminescent assays (LICA) are homogeneous assays that are sensitive, specific, and free of separation and washing steps and have high throughput and high precision. Methods In this research, we developed a competitive method by LICA to achieve accurate quantification of estradiol (E2) in human serum. E2 competed with estriol (E3) for binding to anti‐human E2 antibodies. E3 was linked to biotin via bovine serum albumin as a linker. As this assay used competition between the labeled tracer and the analyte, an increase in E2 concentration will cause a signal decrease. Results The expected detection range of E2 was 20‐5000 pg/mL. The analytical and functional sensitivities were 7.16 and 13.7 pg/mL, respectively. The intra‐ and inter‐assay coefficients of variation were both below 15%, and the recovery rate ranged from 97.5% to 106.8%. The interference rates ranged from −3.6% to 5.4% and met detection requirements for E2 in hyperbilirubinemia, hemolysis, and lipemia in clinical samples. In addition, the cross‐reactivity rates between E2 and structural analogs and some reproductive hormones varied from 1.9% to 10.6% which showed that LICA is highly specific for E2. Moreover, our results showed high accordance with the IMMULITE 2000 (y = 0.6695x + 47.92, r2 = .843) and VIDAS systems (y = 1.099x − 821.5, r2 = .9392). Conclusion Our data show that the LICA, which is easy to automate, is a promising technique for quantification of E2 in human serum and could be used for clinical detection.
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Affiliation(s)
- Jiuzhi Li
- School of Medical Laboratory, Tianjin Medical University, Tianjin, China.,Department of Clinical Laboratory, Tianjin Central Hospital of Obstetrics and Gynecology, Tianjin, China
| | - Liuxu Li
- School of Medical Laboratory, Tianjin Medical University, Tianjin, China
| | - Ying Bian
- School of Medical Laboratory, Tianjin Medical University, Tianjin, China
| | - Yang Yu
- School of Medical Laboratory, Tianjin Medical University, Tianjin, China
| | - Zhonghua Qiang
- School of Medical Laboratory, Tianjin Medical University, Tianjin, China
| | - Yuexiang Zhang
- Department of Clinical Laboratory, Tianjin Central Hospital of Obstetrics and Gynecology, Tianjin, China
| | - Huiqiang Li
- School of Medical Laboratory, Tianjin Medical University, Tianjin, China
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