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Journal of Clinical Laboratory Analysis

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https://www.readbyqxmd.com/read/28940712/evaluation-of-a-newly-developed-chemiluminescence-immunoassay-for-detecting-cardiac-troponin-t
#1
Jingkun Wang, Yizhen Fang, Peihua Li, Huayue Lin, Hongwei Jin, Lei Gao, Shengxiang Ge, Zhong-Ying Zhang
BACKGROUND: To evaluate the performance of a chemiluminescence detection kit for cardiac troponin T (cTnT). METHODS: According to the "Guiding principles on performance analysis of diagnostic reagents in vitro" and the Clinical and Laboratory Standards Institute (CLSI) Guidelines, we assessed the detection limit, linear range, reportable range, accuracy, precision, cross reactivity, interference factors, and matrix effect of the kit, and compared these parameters with that of the commercial electrochemiluminescence detection kit for cTnT (Roche)...
September 22, 2017: Journal of Clinical Laboratory Analysis
https://www.readbyqxmd.com/read/28940690/simple-strategy-for-sensitive-detection-of-dopamine-using-cdte-qds-modified-glassy-carbon-electrode
#2
Hong-Wei Yu, Ze Zhang, Jing-Hui Jiang, Hong-Zhi Pan, Dong Chang
BACKGROUND: Cellular and brain metabolism of dopamine can be correlated with a number of neurodegenerative disorders, our study was to explore a simple and efficient method to detect dopamine in real samples. METHODS: A new quantum dots (CdTe QDs) could be prepared using the hydrothermal method, the electrochemical biosensor was established by dropping CdTe QDs on the surface of glassy carbon electrode (GCE). RESULTS: The CdTe QDs/GCE exhibited the excellent electrochemical catalytic activity toward dopamine (DA) with good stability and high sensitivity in presence of interfering substances...
September 22, 2017: Journal of Clinical Laboratory Analysis
https://www.readbyqxmd.com/read/28940688/clinical-values-of-circular-rna-0000181-in-the-screening-of-gastric-cancer
#3
Qianfu Zhao, Shijun Chen, Tianwen Li, Bingxiu Xiao, Xinjun Zhang
BACKGROUND: Circular RNAs (circRNAs) are recently found involved in cancer occurrence and development. However, their values in the diagnosis of gastric cancers are largely unknown. In this study, we analyzed the values of hsa_circ_0000181 in the diagnosis of gastric cancer. METHODS: Using divergent primers, hsa_circ_0000181 expression levels in fresh gastric cancer tissues and paired adjacent non-tumorous tissues, and plasmas from patient with gastric cancer and health people were detected by real-time quantitative reverse transcription-polymerase chain reaction (qRT-PCR)...
September 22, 2017: Journal of Clinical Laboratory Analysis
https://www.readbyqxmd.com/read/28940325/evaluation-of-the-rt-lamp-and-lamp-methods-for-detection-of-mycobacterium-tuberculosis
#4
Dandan Wu, Jiwen Kang, Baosheng Li, Dianxing Sun
BACKGROUND: The current methods for detecting Mycobacterium tuberculosis (Mtb) are not clinically optimal. Standard culture methods (SCMs) are slow, costly, or unreliable, and loop-mediated isothermal amplification (LAMP) cannot differentiate live Mtb. METHODS: This study compared reverse transcription (RT)-LAMP, LAMP, and an SCM for detecting Mtb. A first experiment tested the sensitivity and specificity of primers for 9 species of Mycobacterium (H37Rv, M. intracellulare, M...
September 22, 2017: Journal of Clinical Laboratory Analysis
https://www.readbyqxmd.com/read/28926140/biological-variation-of-serum-neuron-specific-enolase-and-carbohydrate-antigen-724-tumor-markers
#5
Shuo Wang, Min Zhao, Runqing Mu, Xin Zhang, Ke Yun, Hong Shang
BACKGROUND: The aim of our study was to assess two tumor markers, carbohydrate antigen 724 (CA724) and neuron-specific enolase (NSE), in 20 healthy individuals. Then, we determined their average intra- and inter-individual biological variations (CVI and CVG ). METHODS: Blood samples were taken at weekly intervals for five weeks from 20 healthy subjects through a detailed questionnaire and physical examination. These samples were stored at -80°C and analyzed in a single run in duplicate...
September 19, 2017: Journal of Clinical Laboratory Analysis
https://www.readbyqxmd.com/read/28926139/the-synonymous-nucleotide-substitution-rhd-1056c-g-alters-mrna-splicing-associated-with-serologically-weak-d-phenotype
#6
Sejong Chun, Jae Won Yun, Geon Park, Duck Cho
BACKGROUND: D antigen is one of the most clinically significant blood group antigens. Variation of the RHD gene can cause weak D or partial D phenotypes. While most variations are missense substitutions with amino acid changes, those without are called "silent" or "synonymous" substitutions. Synonymous substitutions often have little effect on the protein, not altering the phenotype. However, effect on splicing can affect end-product protein. We report a new synonymous variation, RHD 1056C>G, that resulted in weak D phenotype, and predicted its effect with various in silico methods...
September 19, 2017: Journal of Clinical Laboratory Analysis
https://www.readbyqxmd.com/read/28926129/evaluation-of-the-new-restandardized-abbott-architect-25-oh-vitamin-d-assay-in-vitamin-d-insufficient-and-vitamin-d-supplemented-individuals
#7
Wijtske Annema, Albina Nowak, Arnold von Eckardstein, Lanja Saleh
BACKGROUND: Recently, Abbott Diagnostics has restandardized the Architect 25(OH)D assay against the NIST SRM 2972. We have evaluated the analytical and clinical performance of the restandardized Architect 25(OH)D assay and compared its performance with a NIST-traceable liquid chromatography-tandem mass spectrometry (LC-MS/MS) method and the Roche total 25(OH)D assay in vitamin D-insufficient individuals before and after vitamin D3 supplementation. METHODS: Frozen serum samples were obtained from 88 healthy subjects with self-perceived fatigue and vitamin D-insufficiency <50 nmol L(-1) who were randomized to receive a single 100 000 IU dose of vitamin D3 (n = 48) or placebo (n = 40)...
September 19, 2017: Journal of Clinical Laboratory Analysis
https://www.readbyqxmd.com/read/28922493/combined-use-of-clauss-and-prothrombin-time-derived-methods-for-determining-fibrinogen-concentrations-screening-for-congenital-dysfibrinogenemia
#8
Liqun Xiang, Meiling Luo, Jie Yan, Lin Liao, Weijie Zhou, Xuelian Deng, Donghong Deng, Peng Cheng, Faquan Lin
BACKGROUND: In this study, the significance of fibrinogen concentration assessed by a combination of Clauss and prothrombin time (PT)-derived methods for screening for congenital dysfibrinogenemia were investigated, and the screening efficiency of fibrinogen PT-derived/Clauss ratio on congenital dysfibrinogenemia was analyzed. METHODS: We compared fibrinogen concentrations determined by the Clauss, PT-derived, and enzyme-linked immunosorbent assay (ELISA) methods in 73 patients with congenital dysfibrinogenemia and 81 normal controls...
September 18, 2017: Journal of Clinical Laboratory Analysis
https://www.readbyqxmd.com/read/28922477/reference-intervals-for-serum-bilirubin-urea-and-uric-acid-in-healthy-chinese-geriatric-population
#9
Yuanqing Yang, Hongmin Jiang, Aiguo Tang, Zhongyuan Xiang
OBJECTIVES: The study aims to establish the reference intervals (RIs) for total bilirubin (TBIL), direct bilirubin (DBIL), urea (UR), and uric acid (UA) in healthy Chinese geriatric population. METHODS: Eight hundred and twenty cases from six representative geographical regions in China (including male 413 cases and female 407 cases) of apparently healthy individuals aged 60-96 years were recruited. Serum TBIL, DBIL, UR, and UA were analyzed by automatic biochemical analyzer and RIs were determined following CLSI C28-A3 guidelines using a non-parametric method...
September 18, 2017: Journal of Clinical Laboratory Analysis
https://www.readbyqxmd.com/read/28884842/distribution-of-mycobacterium-tuberculosis-in-korea-in-the-preceding-decade
#10
Jae-Sik Jeon, Jae Kyung Kim, Qute Choi, Jong Wan Kim
BACKGROUND: Tuberculosis (TB) is an infectious disease caused by the bacillus Mycobacterium tuberculosis (MTB); it is transmitted among people through air. The aim of this study was to assess the prevalence of TB and its clinical trends by collecting and analyzing data on specimens in Korea. METHODS: All clinical specimens referred to the Dankook University Hospital Laboratory in Cheonan, Korea, from September 2005 to June 2016 were tested to isolate MTB using solid and liquid cultures, acid-fast bacilli (AFB) smears, and polymerase chain reactions (PCR)...
September 8, 2017: Journal of Clinical Laboratory Analysis
https://www.readbyqxmd.com/read/28881400/quality-specification-and-status-of-internal-quality-control-of-cardiac-biomarkers-in-china-from-2011-to-2016
#11
Tingting Li, Wei Wang, Haijian Zhao, Falin He, Kun Zhong, Shuai Yuan, Zhiguo Wang
BACKGROUND: This study aimed to investigate the status of internal quality control (IQC) for cardiac biomarkers from 2011 to 2016 so that we can have overall knowledge of the precision level of measurements in China and set appropriate precision specifications. METHODS: Internal quality control data of cardiac biomarkers, including creatinine kinase MB (CK-MB) (μg/L), CK-MB(U/L), myoglobin (Mb), cardiac troponin I (cTnI), cardiac troponin T (cTnT), and homocysteines (HCY), were collected by a web-based external quality assessment (EQA) system...
September 7, 2017: Journal of Clinical Laboratory Analysis
https://www.readbyqxmd.com/read/28872708/validation-of-an-automated-immune-turbidimetric-assay-for-serum-gelsolin-and-its-possible-clinical-utility-in-sepsis
#12
Zoltán Horváth-Szalai, Péter Kustán, Balázs Szirmay, Ágnes Lakatos, Per H Christensen, Tamás Huber, Beáta Bugyi, Diána Mühl, Andrea Ludány, Attila Miseta, Gábor L Kovács, Tamás Kőszegi
BACKGROUND: Studies showing the potential predictive value of the actin-binding protein gelsolin, in critically ill patients are scarce. Moreover, even up to now a rapid automated measurement of gelsolin has still remained a challenge. Therefore, we developed and validated an automated serum gelsolin immune turbidimetric assay for possible clinical use. METHODS: Validation of serum gelsolin assay was performed on a Cobas 8000/c502 analyzer (Roche) according to the second edition of Eurachem guidelines...
September 5, 2017: Journal of Clinical Laboratory Analysis
https://www.readbyqxmd.com/read/28857364/glycated-hemoglobin-a-powerful-tool-not-used-enough-in-primary-care
#13
Maria Salinas, Maite López-Garrigós, Emilio Flores, Carlos Leiva-Salinas
BACKGROUND: Glycated haemoglobin (HbA1c) is one of the most useful and relevant laboratory tests currently available. The aim of the actual research was to study the variability and appropriateness in the request of HbA1c in primary care, and differences between regions, to assess if there would be an opportunity to improve the request. METHODS: A cross-sectional study was conducted enrolling clinical Spanish laboratories. The number of HbA1c requested in 2014 by all general practitioners was reported by each participant...
August 30, 2017: Journal of Clinical Laboratory Analysis
https://www.readbyqxmd.com/read/28834598/comparison-of-noninvasive-and-invasive-point-of-care-testing-methods-with-reference-method-for-hemoglobin-measurement
#14
Gamze Avcioglu, Cemil Nural, Fatma Meriç Yilmaz, Pervin Baran, Özcan Erel, Gülsen Yilmaz
BACKGROUND: Rapid and practical point-of-care testing (POCT) devices become more popular, especially in blood donation centers for determining predonation hemoglobin (Hb) concentrations. The purpose of this study was to evaluate accordance between the POCT methods and the venous method as the reference to Hb screening. METHODS: A total of 353 subjects with no known significant health problems were included in the study. Hb screening was performed by two different POCT methods, a noninvasive method (Haemospect, MBR, Germany) and an invasive method (HemoControl, EKF Diagnostic, Germany), and a venous method as the reference (Sysmex XE-2100, Sysmex Europe, Germany)...
August 23, 2017: Journal of Clinical Laboratory Analysis
https://www.readbyqxmd.com/read/28834572/multiple-genetic-variants-associated-with-posttransplantation-diabetes-mellitus-in-chinese-han-populations
#15
Jie Chen, Lixin Li, Yunfei An, Junlong Zhang, Yun Liao, Yi Li, Lanlan Wang
OBJECTIVES: Posttransplantation diabetes mellitus (PTDM) is a major complication after solid organ transplantation. This study is to investigate the association of nine genetic variant factors and PTDM in Chinese Han patients. METHODS: HLA-DP (rs3077, rs9277535), HLA-DQ (rs7453920), signal transducer and activator of transcription 4 (STAT4) (rs7574865), IL-28B (rs12979860, rs8099917, and rs12980275), and IL-18 (rs1946518 and rs187238) were investigated in 260 liver transplant recipients (PTDM vs non-PTDM) by high-resolution melting curve analysis...
August 23, 2017: Journal of Clinical Laboratory Analysis
https://www.readbyqxmd.com/read/28815794/finding-the-candidate-sequence-variants-for-diagnosis-of-hypertrophic-cardiomyopathy-in-east-slovak-patients
#16
Michaela Zigova, Jarmila Bernasovska, Iveta Boronova, Marta Mydlarova Blascakova, Jan Kmec
BACKGROUND: Hypertrophic cardiomyopathy is a heterogeneous myocardial disease. Mutations appearing in several genes might be a potential cause of the disease. The aim of the study was to analyze selected exons of the sarcomeric and non-sarcomeric genes, with the purpose to identify potential candidate genetic variants and to understand etiopathogenetic mechanisms of hypertrophic cardiomyopathy in East Slovak patients. METHODS: This study recruited 23 unrelated patients with hypertrophic cardiomyopathy, namely, 13 men and 10 women (mean age of 58...
August 16, 2017: Journal of Clinical Laboratory Analysis
https://www.readbyqxmd.com/read/28810082/therapeutic-monoclonal-antibodies-and-clinical-laboratory-tests-when-why-and-what-is-expected
#17
Zhanhu Zhang, Wenjie Hu, Linlin Li, Hongxia Ding, Haibo Li
BACKGROUND: We herein provide an overview of the clinical laboratory tests that should be performed before, during and after using therapeutic monoclonal antibodies (mAbs) and the clinical laboratory tests that may be affected by mAbs. METHODS: The labels of FDA-approved therapeutic mAbs were downloaded from DailyMed (the official website for drug labels) and were used as the sources of data for this review. RESULTS: It was found that most of the labels provided information relevant to the clinical laboratory tests, including the tests needed before mAbs treatment to check the patients' background status and to identify potentially sensitive patients, the tests needed during or after the treatment to evaluate the patients' response, and the mAbs that may lead to false positive or negative results for clinical laboratory tests...
August 15, 2017: Journal of Clinical Laboratory Analysis
https://www.readbyqxmd.com/read/28771883/a-study-on-the-biological-reference-interval-of-urinary-alpha-1-microglobulin-in-a-group-of-chinese-people
#18
Qian Zhang, Xu Jiang, Xiao-Fan Cui, Rui Liu
OBJECTIVE: The aim of this study was to explore the possible influences of age and gender on urinary Alpha 1-Microglobulin (α1-MG) concentrations and establish specific reference values of urinary α1-MG in a group of healthy adults. METHODS: Two hundred and ninety-nine adults (141 males and 158 females) aged 20-60 were selected and grouped by gender and age. Urinary levels of α1-MG were detected in morning spot-urine samples, and statistical analysis was performed to explore the association between urinary α1-MG and clinical parameters, and the differences between groups were compared...
August 3, 2017: Journal of Clinical Laboratory Analysis
https://www.readbyqxmd.com/read/28771834/molecular-prenatal-diagnosis-of-alpha-and-beta-thalassemia-in-pregnant-hakka-women-in-southern-china
#19
Pingsen Zhao, Heming Wu, Zhixiong Zhong, Liubing Lan, Mei Zeng, Hualan Lin, Huaxian Wang, Zhiyuan Zheng, Luxian Su, Wei Guo
BACKGROUND: To date, there has been no systematic study of DNA-based prenatal diagnosis of thalassemia in pregnant Hakka women in southern China. METHODS: A total of 279 pregnant Hakka women with confirmed cases of thalassemia who had been treated at the Meizhou People's Hospital in China's Guangdong Province from January 2014 to December 2016 were here enrolled. Genomic DNA was extracted from peripheral blood of couples and villus, amniotic fluid, or fetal cord blood...
August 3, 2017: Journal of Clinical Laboratory Analysis
https://www.readbyqxmd.com/read/28763119/the-prevalence-and-molecular-characterization-of-%C3%AE-%C3%AE-0-thalassemia-and-hereditary-persistence-of-fetal-hemoglobin-in-the-chinese-zhuang-population
#20
Sheng He, Yuan Wei, Li Lin, Qiuli Chen, Shang Yi, Yangjin Zuo, Hongwei Wei, Chenguang Zheng, Biyan Chen, XiaoXia Qiu
OBJECTIVE: To reveal the prevalence and molecular characterization of (δβ)(0) -thalassemia [(δβ)(0) -thal] and hereditary persistence of fetal hemoglobin (HPFH) in the Chinese Zhuang population. METHODS: A total of 105 subjects with fetal hemoglobin (Hb F) level ≥5% from 14 204 unrelated ones were selected for the study. Multiplex ligation dependent probe amplification was firstly used to analyze dosage changes of the β-globin gene cluster for associated with (δβ)(0) -thal and HPFH mutations...
August 1, 2017: Journal of Clinical Laboratory Analysis
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