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Clinica Chimica Acta; International Journal of Clinical Chemistry

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https://www.readbyqxmd.com/read/28720541/biological-sources-of-variation-of-serum-adiponectin-among-healthy-individuals-in-comparison-with-related-nutritional-and-inflammatory-markers
#1
Yoshihisa Shimizu, Kiyoshi Ichihara, Katsuyuki Nakajima
BACKGROUND: Serum adiponectin (AN) is a nutritional and inflammatory marker of various diseases. Its biological sources of variation (SVs) have been widely evaluated in, but its relationships with other related markers remain to be studied comprehensibly by use of multivariate analyses including factor analysis. METHODS: Serum specimens from 752 well-defined healthy subjects (295 males; 457 females) obtained from Japan, Hong Kong, Taiwan, and Vietnam were tested for total AN (tAN) and high-molecular-weight AN (hmAN) together with 71 major analytes...
July 15, 2017: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/28713031/an-lc-ms-ms-based-candidate-reference-method-for-the-quantification-of-carbamazepine-in-human-serum
#2
Judith Taibon, Rupert Schmid, Stephanie Lucha, Stephan Pongratz, Kirill Tarasov, Christoph Seger, Christian Timm, Roland Thiele, Joachim Mark Herlan, Uwe Kobold
A validated LC-MS/MS-based candidate reference measurement procedure for the quantification of carbamazepine is presented in order to be used for standardization and harmonization of routine assays applied for therapeutic drug monitoring. Sample preparation was based on protein precipitation using acetonitrile followed by sample dilution. Since the previously listed certified reference material (CRM) SRM 1599 (anticonvulsant drug level assay standard) is no longer available, an ISO certified calibration material was used in this assay...
July 13, 2017: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/28709799/trough-dabrafenib-plasma-concentrations-can-predict-occurrence-of-adverse-events-requiring-dose-reduction-in-metastatic-melanoma
#3
Marine Rousset, Caroline Dutriaux, Pauline Bosco-Lévy, Sorilla Prey, Anne Pham-Ledard, Léa Dousset, Emilie Gérard, Stephane Bouchet, Mireille Canal-Raffin, Karine Titier, Mathieu Molimard
INTRODUCTION: Dabrafenib and trametinib bitherapy provides significant benefits in BRAFV600(mut) metastatic melanoma patients; however, adverse events (AE) occur, leading to dose reduction in 33% of patients. We aimed to investigate a relation between plasma dabrafenib and trametinib concentrations and occurrence of AE. METHODS: Plasma samples from metastatic BRAFV600(mut) melanoma patients treated with dabrafenib±trametinib were prospectively collected at trough concentration before any dose reduction...
July 12, 2017: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/28709800/detection-of-autoantibodies-to-3-hydroxy-3-methylglutaryl-coenzyme-a-reductase-by-elisa-in-a-reference-laboratory-setting
#4
Troy D Jaskowski, Sonia L La'ulu, Michael Mahler, Anne E Tebo
BACKGROUND: We investigated the performance of an ELISA for the detection of 3-hydroxy-3-methyl-glutaryl-coenzyme A reductase (HMGCR) IgG antibodies in immune-mediated necrotizing myopathies (IMNM). METHODS: Patients positive for HMGCR antibodies (n=61) or negative (n=78) by protein immunoprecipitation (IP), and healthy controls (n=100) were used to evaluate the ELISA. Unique consecutive serum samples (n=155) received at ARUP Laboratories for HMGCR IgG testing by ELISA were also investigated and analysed for serum muscle enzymes (aldolase, creatine kinase, and myoglobin)...
July 11, 2017: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/28705776/short-and-medium-term-biological-variation-estimates-of-leukocytes-extended-to-differential-count-and-morphology-structural-parameters-cell-population-data-in-blood-samples-obtained-from-healthy-people
#5
Sabrina Buoro, Anna Carobene, Michela Seghezzi, Barbara Manenti, Aurelio Pacioni, Ferruccio Ceriotti, Cosimo Ottomano, Giuseppe Lippi
BACKGROUND: Recent studies showed that some cell population data (CPD) parameters of neutrophils may be useful for diagnosing myelodysplastic syndromes and sepsis, for the differential diagnosis of acute promyelocytic leukemia, and some CPD parameters of lymphocytes may be a valuable tool for preliminary screening of B cell lymphoproliferative disease. Notwithstanding the knowledge, no information has been made available about their analytical quality specification. This study was aimed to define short- and medium-term biological variation (BV) estimates and reference change value (RCV) of leukocyte count, extended leukocyte differential and CPD...
July 10, 2017: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/28705775/new-cataract-markers-mechanisms-of-disease
#6
REVIEW
Xiangjia Zhu, Shaohua Zhang, Ruiqi Chang, Yi Lu
Cataract is caused by nutritional, metabolic, environmental, and genetic factors, and is a significant cause of blindness and visual impairment. In recent years, extensive research into the human genome has revealed that numerous genetic mutations are associated with cataract. These mutations affect a variety of genes, including those encoding crystallin, membrane proteins, cytoskeletal proteins, transcription factors, and metabolism-related proteins. Elucidation of these mutations and the genetic and molecular mechanisms has helped clarify the etiology of cataract and may facilitate its early diagnosis and treatment...
July 10, 2017: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/28698064/microrna-1-inhibits-ovarian-cancer-cell-proliferation-and-migration-through-c-met-pathway
#7
Wanglei Qu, Xiaoyan Chen, Jiao Wang, Jieqiang Lv, Dongsheng Yan
In this study, we investigated the differential expression of microRNAs in an ovarian cancer cell line HO-8910PM with increased migration and invasiveness activities. miR-1 was found to be one of the microRNA species most significantly downregulated in HO-8910PM compared with the control cell line HO-8910. We demonstrated that ovarian cancer tissues expressed decreased levels of miR-1 compared to non-neoplastic tissue. In vitro experiments showed that overexpression of miR-1 in HO-8910PM led to an inhibition of cell proliferation, blocking of cell cycle progression by G1 phase arrest, and decreased migration and invasiveness of HO-8910PM cells...
July 8, 2017: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/28694125/a-fully-analytical-approach-to-investigate-the-electro-viscous-effect-of-the-endothelial-glycocalyx-layer-on-the-microvascular-blood-flow
#8
Arezoo Khosravi, Hadi Asgharzadeh Shirazi, Alireza Asnafi, Alireza Karimi
BACKGROUND: Recently, the glycocalyx lining the endothelial surface has emerged as a structure of fundamental importance to a wide range of phenomena that has undeniable effect on cardiovascular health and disease. With respect to the blood flow in small vessels, it has been experimentally reported that the glycocalyx layer causes additional resistance to the flow. METHODS: The hypothesis of glycocalyx resistance against the blood flow, considered as two-phase layer fluid through a small blood vessel, was theoretically evaluated...
July 8, 2017: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/28694124/the-standardization-of-5-immunoassays-for-anti-toxoplasma-immunoglobulin-g-igg
#9
Kuo Zhang, Guigao Lin, Yanxi Han, Jinming Li
BACKGROUND: Quantitative immunoassays to detect IgG antibodies are the most commonly used tests for diagnosing toxoplasmosis. We investigated the current state of standardization of quantitative immunoassays used to measure anti-Toxoplasma IgG levels. METHODS: Four fully automated immunoassays (Architect i4000ISR, Immulite 2000 Xpi, Siemens; Liaison, DiaSorin; Cobas e601, Roche) and one manual immunoassay (ELISA classic Toxo IgG, Virion Serion) were performed on the following: individual patient serum samples, the WHO international standards, control samples, and calibrators provided by 5 immunoassay manufacturers...
July 8, 2017: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/28689857/risk-of-misclassification-with-a-non-fasting-lipid-profile-in-secondary-cardiovascular-prevention
#10
Boudewijn Klop, Simone C C Hartong, Henricus J Vermeer, Mariette W C J Schoofs, Marcel J M Kofflard
AIMS: Routinely fasting is not necessary for measuring the lipid profile according to the latest European consensus. However, LDL-C tends to be lower in the non-fasting state with risk of misclassification. The extent of misclassification in secondary cardiovascular prevention with a non-fasting lipid profile was investigated. METHODS AND RESULTS: 329 patients on lipid lowering therapy for secondary cardiovascular prevention measured a fasting and non-fasting lipid profile...
July 6, 2017: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/28687351/prevalence-of-anti-nt5c1a-antibodies-in-japanese-patients-with-autoimmune-rheumatic-diseases-in-comparison-with-other-patient-cohorts
#11
Yoshinao Muro, Hirotaka Nakanishi, Masahisa Katsuno, Michihiro Kono, Masashi Akiyama
BACKGROUND: Sporadic inclusion body myositis (sIBM) is usually classified as an idiopathic inflammatory myopathies. Although the diagnosis of sIBM is sometimes challenging, recent studies have shown that the autoantibodies against cytosolic 5'-nucleotidase 1A (NT5C1A) are the possible diagnostic biomarker for sIBM. Few reports have shown the frequencies of anti-NT5C1A antibodies in systemic autoimmune rheumatic diseases (SARDs) using large cohorts of SARDs. METHODS: Serum samples obtained from 314 patients including dermatomyositis (DM) (n=144), systemic lupus erythematosus (SLE) (n=50), systemic sclerosis (SSc) (n=50), Sjögren's syndrome (SS) (n=50), polymyositis (PM) (n=10) and mixed connective tissue disease (n=10), and healthy controls (n=42) in addition to 10 patients with typical sIBM were analysed for the presence of autoantibodies using full-length recombinant NT5C1A ELISA...
July 4, 2017: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/28687350/clinical-response-to-long-term-tenofovir-monotherapy-in-korean-chronic-hepatitis-b-patients
#12
Eun-Hyung Yoo, Hyun-Jung Cho
BACKGROUND: Tenofovir disoproxil fumarate (TDF) is a potent nucleotide analogue recommended as first-line monotherapy for chronic hepatitis B (CHB). We investigated the clinical response to TDF monotherapy in Korean CHB patients. METHODS: A total of 90 CHB patients [55 hepatitis B e antigen (HBeAg)-positive and 35 HBeAg-negative] who received TDF monotherapy for >2year, were enrolled. Quantitative hepatitis B surface antigen (qHBsAg) levels, serum alanine aminotransferase (ALT), HBeAg, anti-HBe and HBV DNA levels were measured during treatment...
July 4, 2017: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/28684219/elevated-plasma-levels-of-mir-29a-are-associated-with-hemolysis-in-patients-with-hypertrophic-cardiomyopathy
#13
Dimitrios Ntelios, Soultana Meditskou, Georgios Efthimiadis, Antonios Pitsis, Eleni Nikolakaki, Fotios Girtovitis, Despoina Parcharidou, Thomas Zegkos, Sofia Kouidou, Haralampos Karvounis, Georgios Tzimagiorgis
BACKGROUND: miR-29a is a small non-coding RNA that is known to repress collagen synthesis. Interestingly, elevated plasma miR-29a was reported to correlate with pronounced myocardial fibrosis in patients with hypertrophic cardiomyopathy. The objective of this study was to elucidate the origin of plasma miR-29a, and evaluate its significance as a biomarker. METHODS: miR-29a expression was evaluated in plasma (n=50) and myocardial samples (n=4) from patients with hypertrophic cardiomyopathy using RT-qPCR...
July 4, 2017: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/28684218/the-relationship-between-s-adenosylhomocysteine-and-coronary-artery-lesions-a-case-control-study
#14
Xinrui Huang, Xin Lv, Hui Song, Qing Yang, Yuemin Sun, Wenjuan Zhang, Xiangdong Yu, Shaozhuang Dong, Wei Yao, Yongle Li, Qing Wang, Bei Wang, Liya Ma, Guowei Huang, Yuxia Gao
The role of homocysteine (Hcy) in the pathogenesis of coronary artery disease (CAD) is controversial, as decreased Hcy levels have not demonstrated consistent clinical benefits. Recent studies propose that S-adenosylhomocysteine (SAH), and not Hcy, plays a role in cardiovascular disease (CVD). We aimed to assess the relationship between plasma SAH and coronary artery lesions. Participants (n=160; aged 40-80years) with chest pain and suspected CAD underwent coronary angiography (CAG) for assessment of coronary artery stenosis, and were assigned to either the atherosclerosis (AS) or CAD group...
July 4, 2017: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/28684220/correlation-of-serum-anti-mullerian-hormone-to-follicular-follicle-stimulating-hormone-and-implantation-potential-of-the-ensuing-embryos
#15
Maw-Sheng Lee, Shu-Ling Tzeng, Shun-Fa Yang, Yi-Ping Lin, En-Hui Cheng, Chun-Chia Huang, Yu-Shih Yang, Tsung-Hsien Lee
Serum anti-Mullerian hormone (AMH) is a predictor of the pregnancy outcome in assisted reproductive technology (ART) cycles, particularly for older women. This study attempts to elucidate the effect of serum AMH on follicular hormone profiles and implantation outcome of the ensuing embryos in ART cycles. A total of 412 patients undergoing ART cycles at a private infertility center were included and 780 follicular fluid samples were collected. Levels of follicular hormones, including FSH, LH, inhibin B, AMH, estradiol, progesterone, and androstenedione were measured...
July 3, 2017: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/28676442/a-biochip-based-combined-immunoassay-for-detection-of-serological-status-of-borrelia-burgdorferi-in-lyme-borreliosis
#16
Na-Li Huang, Lei Ye, Hui Lv, Yi-Xin Du, Marion Schneider, Li-Bin Fan, Wei-Dong Du
BACKGROUND: Dithiobis (succinimidyl undecanoate) modified gold surface biochip were used as a combined immunoassay platform for concurrently detecting immune responses to Borrelia burgdorferi (B. burgdorferi) sensu lato antigens, flagellin, outer surface protein C, variable major protein-like sequence proteins, and 3 VlsE protein IR6 peptides. The peptides represented intrinsic Borrelia genospecies: B. burgdorferi sensu stricto, B. garinii, and B. afzelii, respectively. METHODS: Fourier transform infrared spectroscopy was utilized to validate the surface chemical characteristics on the modified gold surface...
July 1, 2017: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/28673815/autoantibodies-to-su-argonaute-2-in-japanese-patients-with-inflammatory-myopathy
#17
Mariko Ogawa-Momohara, Yoshinao Muro, Minoru Satoh, Masashi Akiyama
BACKGROUND: Anti-Su antibodies are found in 5-20% of cases of various systemic autoimmune rheumatic diseases and in 5-10% of dermatomyositis (DM)/polymyositis (PM) patients. In 2006, the 100kDa Su antigen was identified as argonaute2 (Ago2), and it was found to play a major role in RNA interference. However, immunoprecipitation (IP) remains the main method for detecting anti-Su and the clinical significance of the antibodies is uncertain. METHODS: Sera from patients with DM/PM (n=224) were screened by an ELISA that uses recombinant biotinylated Ago2 protein...
June 30, 2017: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/28669684/urinary-metabolomic-analysis-of-intrahepatic-cholestasis-of-pregnancy-based-on-high-performance-liquid-chromatography-mass-spectrometry
#18
Li Ma, Xiaoqing Zhang, Feng Pan, Yue Cui, Ting Yang, Linlin Deng, Yong Shao, Min Ding
BACKGROUND: Intrahepatic cholestasis of pregnancy (ICP), a pregnancy-related liver disease, leads to complications for both mothers and fetuses. Metabolomic approach has been applied to maternal-fetal medicine. The global metabolomic alterations that are specific in ICP as yet have not been investigated. METHODS: Based on high performance liquid chromatography/hybrid quadrupole time-of-flight (HPLC/Q-TOF) mass spectrometry, the untargeted metabolomics was used to analyze the changes of urinary metabolites between ICP group and the control group...
June 29, 2017: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/28668564/serum-periostin-concentrations-and-outcomes-after-severe-traumatic-brain-injury
#19
Xiao-Qiao Dong, Wen-Hua Yu, Quan Du, Hao Wang, Qiang Zhu, Ding-Bo Yang, Zhi-Hao Che, Yong-Feng Shen, Li Jiang
BACKGROUND: Periostin, a neurite outgrowth-promoting factor, is increasingly expressed in rat brain tissues after cerebral ischemia or subarachnoid hemorrhage. However, periostin concentrations are undetermined in peripheral blood from patients with traumatic brain injury (TBI). METHODS: In this prospective, observational study, serum periostin concentrations were measured in 130 controls and 130 severe TBI patients. We investigated its association with trauma severity reflected by Glasgow Coma Scale (GCS) score and prognosis (i...
June 28, 2017: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/28645551/association-between-blood-vitamin-d-and-myocardial-infarction-a-meta-analysis-including-observational-studies
#20
REVIEW
Jizhen Huang, Zhiwei Wang, Zhipeng Hu, Wanli Jiang, Bowen Li
BACKGROUND: The association between blood vitamin D levels and the risk of myocardial infarction (MI) is controversial. This meta-analysis aimed to describe the relationship between MI risk and blood vitamin D levels. METHODS: Online databases were searched in PubMed, EMBASE and Web of science till February 2017 for observational studies in relation to reporting the vitamin D levels in MI cases and non-MI controls. The weighted mean difference (WMD) or odds ratio (OR), with 95% confidence interval (CI), were calculated to evaluate the relationship between MI risk and blood vitamin D levels...
June 20, 2017: Clinica Chimica Acta; International Journal of Clinical Chemistry
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