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chemiluminescence immunoassay

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https://www.readbyqxmd.com/read/29333150/evaluation-of-the-correlation-coefficient-of-polyethylene-glycol-treated-and-direct-prolactin-results-and-comparability-with-different-assay-system-results
#1
Shyamali Pal
The presence of Macro prolactin is a significant cause of elevated prolactin resulting in misdiagnosis in all automated systems. Poly ethylene glycol (PEG) pretreatment is the preventive process but such process includes the probability of loss of a fraction of bioactive prolactin. Surprisingly, PEG treated EQAS & IQAS samples in Cobas e 411 are found out to be correlating with direct results of at least 3 immunoassay systems and treated and untreated Cobas e 411 results are comparable by a correlation coefficient...
December 2017: EJIFCC
https://www.readbyqxmd.com/read/29332809/peroxidase-catalyzed-chemiluminescence-system-and-its-application-in-immunoassay
#2
REVIEW
Zhao Zhang, Jiahui Lai, Kesen Wu, Xingcan Huang, Shuai Guo, Lili Zhang, Jian Liu
Peroxidases are widely used as catalysts in chemiluminescence (CL) reaction because of their excellent catalytic activity and various selectable species, such as horseradish peroxidase (HRP), sweet potato peroxidase (SPP) and soybean peroxidase (SbP). They have been employed in many different CL systems for the determination of hydrogen peroxidase (H2O2), nucleic acid, protein and so on. In this paper, the application of peroxidases in the most commonly used luminol-H2O2 CL system was reviewed from two aspects of horseradish peroxidase (HRP) and some anionic peroxidases...
April 1, 2018: Talanta
https://www.readbyqxmd.com/read/29322517/discordant-human-t-lymphotropic-virus-screening-with-western-blot-confirmation-evaluation-of-the-dual-test-algorithm-for-us-blood-donations
#3
Susan L Stramer, Rebecca L Townsend, Gregory A Foster, Ramona Johnson, Barbara Weixlmann, Roger Y Dodd
BACKGROUND: Human T-lymphotropic virus (HTLV) blood donation screening has used a dual-testing algorithm beginning with either a chemiluminescent immunoassay or enzyme-linked immunosorbent screening assay (ELISA). Before the availability of a licensed HTLV supplemental assay, repeat-reactive (RR) samples on a first assay (Assay 1) were retested with a second screening assay (Assay 2). Donors with RR results by Assay 2 were deferred from blood donation and further tested using an unlicensed supplemental test to confirm reactivity while nonreactive (NR) donors remained eligible for donation until RR on a subsequent donation...
January 10, 2018: Transfusion
https://www.readbyqxmd.com/read/29313597/vitamin-d-and-vitamin-d-receptor-in-patients-with-ophthalmic-pterygium
#4
Cristina Maxia, Daniela Murtas, Michela Corrias, Ignazio Zucca, Luigi Minerba, Franca Piras, Cristiana Marinelli, Maria Teresa Perra
Pterygium, an ultraviolet radiation (UV)-related disease, is a relatively benign process, but since it displays tumor-like features, it has been proposed to be a neoplastic- like growth disorder. Vitamin D performs a number of functions in addition to calcium homeostasis, as inhibition of cell proliferation, activation of apoptotic pathways, and inhibition of angiogenesis. Since the antitumor actions of vitamin D are mediated primarily through the nuclear vitamin D receptor (VDR), the aim of the present study was to investigate vitamin D status in patients with pterygium and in control subjects, and VDR immunohistochemical expression in samples of pterygium and normal conjunctiva in order to evaluate a possible role of vitamin D pathway in the pathogenesis of the disease...
October 30, 2017: European Journal of Histochemistry: EJH
https://www.readbyqxmd.com/read/29312834/joint-damage-is-amplified-in-rheumatoid-arthritis-patients-with-positive-thyroid-autoantibodies
#5
Yu-Lan Chen, Jian-Zi Lin, Ying-Qian Mo, Jin-Jian Liang, Qian-Hua Li, Cheng-Jing Zhou, Xiu-Ning Wei, Jian-Da Ma, Ze-Hong Yang, Dong-Hui Zheng, Lie Dai
Background: Autoimmune thyroid disease (AITD), which is characterized by an increased presence of thyroid autoantibodies (TAbs), such as antibodies against thyroid peroxidase (TPOAbs) and antibodies against thyroglobulin (TgAbs), has been reported to be associated with rheumatoid arthritis (RA) because AITD and RA both involve autoimmunity. However, few data are available on the incidence of TAbs in Chinese RA patients, and studies on the association between TAbs and joint damage as well as synovitis in RA patients remain sparse...
2018: PeerJ
https://www.readbyqxmd.com/read/29312729/diagnostic-accuracy-of-tumor-markers-for-malignant-pleural-effusion-a-derivation-and-validation-study
#6
Kan Zhai, Wen Wang, Yao Wang, Jing-Yuan Liu, Qiong Zhou, Huan-Zhong Shi
Background: The utility of tumor markers (TMs) for differentiating malignant pleural effusion (MPE) from benign pleural effusion (BPE) has been a subject of controversy. The majority of published studies are single center designed and lack validation. We performed a derivation and validation study in China to evaluate the diagnostic value of carcinoembryonic antigen (CEA) as well as carbohydrate antigen (CA) 15-3, CA 19-9 and CA 125 to differentiate between MPE and BPE. Methods: Three hundred and twenty seven pleural effusion (PE) and paired serum samples were collected from consecutive patients with MPE or BPE in Beijing (174 patients, derivation) and Wuhan (153 patients, validation) during the same period...
December 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/29310836/circulating-long-non-coding-rna-malat1-expression-as-molecular-biomarker-in-egyptian-patients-with-breast-cancer
#7
Haidy E Zidan, Rehab A Karam, Omnia S El-Seifi, Tamer M Abd Elrahman
The abnormal contribution of long non-coding RNA (lncRNAs) expression to human tumorigenesis is still a matter of debate. Breast cancer is the most common cancer in females; it represents a terrible problem in our country. The aim of this research was to assess the role of MALAT1, as one of lncRNAs, as a potential biomarker in breast cancer. This study comprised 80 patients with breast cancer and 80 controls. MALAT1 expression was measured by RT-quantitative polymerase chain reaction (qPCR). CA15-3 was estimated using chemiluminescence immunoassay (CLIA)...
January 2018: Cancer Genetics
https://www.readbyqxmd.com/read/29302932/hba1c-is-positively-associated-with-serum-carcinoembryonic-antigen-cea-in-patients-with-diabetes-a-cross-sectional-study
#8
Jun Lu, Hongtao Wang, Xueli Zhang, Xuemei Yu
INTRODUCTION: To explore the influence of glycemic levels on the serum carcinoembryonic antigen (CEA) levels in patients with diabetes. METHODS: This is a cross-sectional study. Patients with diabetes aged 18-75 years old were recruited. Those patients with carcinoma, abnormal renal function (serum creatinine ≥ 115 μmol/l), and abnormal hepatic function (serum alanine aminotransferase ≥ 97.5 U/l) were excluded in this study. Blood samples were obtained from every patient after an overnight fasting, and CEA was determined using a chemiluminescent particle immunoassay...
January 4, 2018: Diabetes Therapy: Research, Treatment and Education of Diabetes and related Disorders
https://www.readbyqxmd.com/read/29299596/clinical-and-immunological-profiles-of-14-patients-with-bullous-pemphigoid-without-igg-autoantibodies-to-the-bp180-nc16a-domain
#9
Kenta Nakama, Hiroshi Koga, Norito Ishii, Chika Ohata, Takashi Hashimoto, Takekuni Nakama
Importance: Enzyme-linked immunosorbent assay (ELISA) and/or chemiluminescent enzyme immunoassay (CLEIA) for BP180 noncollagenous 16A (NC16A) extracellular domain is a sensitive diagnostic tool for bullous pemphigoid (BP). However, some patients with BP have negative results for these assays. Objective: To elucidate the clinical and immunological features of patients with BP without antibodies that react to BP180 NC16A. Design, Setting, and Participants: This retrospective case series study included 152 patients who were diagnosed with BP and followed up at the Kurume University Hospital in Japan from 2007 to 2016...
January 3, 2018: JAMA Dermatology
https://www.readbyqxmd.com/read/29285476/vitamin-d-status-in-small-vessel-and-large-vessel-ischemic-stroke-patients-a-case-control-study
#10
Navid Manouchehri, Maryam Vakil-Asadollahi, Alireza Zandifar, Fereshteh Rasmani, Mohammad Saadatnia
Background: Vitamin D insufficiency is a globally widespread issue. Recent studies have reported a high prevalence of Vitamin D deficiency in Middle-East countries. Studies have shown negative effects of Vitamin D deficiency on endothelium and related diseases such as ischemic brain stroke. Here, we assessed Vitamin D status in patients with different types of ischemic brain stroke and control group. Materials and Methods: Seventy-five patients (49.3% small vessel, 50...
2017: Advanced Biomedical Research
https://www.readbyqxmd.com/read/29284383/comparison-of-two-methods-for-measurement-of-equine-adrenocorticotropin
#11
Heidi E Banse, Nichol Schultz, Molly McCue, Ray Geor, Dianne McFarlane
Accurate measurement of equine adrenocorticotropin (ACTH) is important for the diagnosis of equine pituitary pars intermedia dysfunction (PPID). Several radioimmunoassays (RIAs) and chemiluminescent immunoassays (CIAs) are used for measurement of ACTH concentration in horses; whether these methods yield similar results across a range of concentrations is not determined. We evaluated agreement between a commercial RIA and CIA. Archived plasma samples ( n = 633) were measured with both assays. Correlation between the 2 methods was moderate ( r = 0...
December 1, 2017: Journal of Veterinary Diagnostic Investigation
https://www.readbyqxmd.com/read/29278878/impact-of-etiology-of-chronic-liver-disease-on-hepatocellular-carcinoma-biomarkers
#12
Gabriele Ricco, Daniela Cavallone, Chiara Cosma, Gian Paolo Caviglia, Filippo Oliveri, Alessandra Biasiolo, Maria Lorena Abate, Mario Plebani, Antonina Smedile, Ferruccio Bonino, Patrizia Pontisso, Maurizia Rossana Brunetto
BACKGROUND: The role of serum biomarkers in the surveillance of hepatocellular carcinoma (HCC) is controversial. OBJECTIVE: We assessed the diagnostic performances of alpha-fetoprotein (AFP) and protein-induced by vitamin-K-absence/antagonist-II (PIVKA-II) in 388 cirrhotic patients with chronic liver disease (CLD). METHODS: Biomarkers were quantified by automated chemiluminescent-enzyme-immunoassays (Fujirebio, Tokyo, Japan) at HCC diagnosis in 258 patients (204 males; median age 66...
December 15, 2017: Cancer Biomarkers: Section A of Disease Markers
https://www.readbyqxmd.com/read/29272982/the-significance-of-serum-igg4-and-ca19-9-autoantibodies-in-diagnosis-and-differential-diagnosis-of-igg4-related-sclerosing-cholangitis
#13
Liming Tan, Xiaolin Guan, Tingting Zeng, Sifan Wu, Wei Zheng, Huiying Fu, Tingting Long, Qiaohua Wang, Yimei Meng, Yongjian Tian, Jianlin Yu, Juanjuan Chen, Hua Li, Liping Cao
OBJECTIVE: To investigate the value of serum levels of IgG4 and CA19-9, and autoantibodies in the diagnosis of IgG4-related sclerosing cholangitis (IgG4-SC). METHODS: We detected the serum IgG4 and CA19-9 of 45 IgG4-SC patients, 173 non-IgG4-SC patients and 48 healthy controls by immunoassay and chemiluminescence, respectively, with antinuclear antibody (ANA), anti-neutrophil antibody (ANCA), anti-smooth muscle antibody (SMA) and anti-mitochondrial antibody (AMA) level detected by indirect immunofluorescence...
December 22, 2017: Scandinavian Journal of Gastroenterology
https://www.readbyqxmd.com/read/29247453/plasma-adrenocorticotropic-hormone-acth-concentrations-in-ponies-measured-by-two-different-assays-suggests-seasonal-cross-reactivity-or-interference
#14
E J Knowles, M C Moreton-Clack, S Shaw, P A Harris, J Elliott, N J Menzies-Gow
BACKGROUND: Analysis of plasma adrenocorticotropic hormone concentration [ACTH] aids diagnosis of pituitary pars intermedia dysfunction (PPID). Comparisons of validated chemiluminescent-immunoassay (CI) and immunofluorescent (IF) assays are limited. OBJECTIVES: To compare the results of [ACTH] analysis by CI and IF methods of samples collected in autumn and spring and assess cross-reactivity. STUDY DESIGN: Method comparison. METHODS: Plasma from non-laminitic ponies was analysed concurrently using the IF and CI methods in autumn and the following spring...
December 16, 2017: Equine Veterinary Journal
https://www.readbyqxmd.com/read/29247381/development-of-a-light-initiated-chemiluminescent-assay-for-the-quantitation-of-sige-against-egg-white-allergens-based-on-component-resolved-diagnosis
#15
Ying Bian, Changshan Liu, Tiantian She, Mengjuan Wang, Juanjuan Yan, Dianjun Wei, Huiqiang Li
The determination of specific IgE (sIgE) level is of great importance in IgE-mediated food allergies. Our aim was to develop a homogeneous immunoassay-light-initiated chemiluminescent assay (LICA)-for measuring allergen sIgE of a single component in egg white, thus evaluating the LICA-sIgE assay as a useful tool in the diagnosis of food allergy. The LICA-sIgE assay was performed by incubating serum sample with anti-human IgE antibody coated with chemiluminescer beads, streptavidin-coated sensitizer beads, and biotinylated antigens, which consist of four components in egg white...
December 15, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/29245248/association-between-serum-cytokines-and-progression-of-breast-cancer-in-chinese-population
#16
Haiyan Wang, Xianlu Yang
The aim of this study was to investigate the roles of serum interleukin-6 (IL-6), IL-8, IL-10, squamous cell cancer antigen (SCC-Ag), and cytokeratin 21-1 fragment (CYFRA 21-1) in the metastasis and prognosis of breast cancer.A total of 534 breast cancer patients admitted to our department between January 2011 and December 2014 were enrolled in this study. Besides, 452 matched healthy individuals received physical examination at the same period served as the normal control. Serum IL-6, IL-8, IL-10, and tumor necrosis factor-α (TNF-α) were determined using an immunoradiometric assay...
December 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29243659/comparative-study-of-the-serum-measurement-of-pth-on-roche-cobas-e411%C3%A2-versus-the-abbott-architect-ci8200%C3%A2
#17
Mohammed Bensalah, Ouardia Bouayadi, Nawal Rahmani, Amina Lyagoubi, Somiya Lamrabat, Mohammed Choukri
Parathormone (PTH) is the main hormone of phosphocalcic homeostasis. It is synthesized and secreted by the parathyroid glands. PTH has become a routine test in the medical biology laboratory. However, its measurement presents analytical difficulties with the various marketed kits. The aim of this work is to present the results of a comparative study between the PTH measurment on Abbott architect ci8200 and on Roche's Cobas e411 automaton. It is a prospective study carried out for 252 hospitalized patients in the various departments of the University Hospital Center Mohammed VI of Oujda...
December 15, 2017: Annales de Biologie Clinique
https://www.readbyqxmd.com/read/29236046/advances-in-proteomic-techniques-for-cytokine-analysis-focus-on-melanoma-research
#18
REVIEW
Helena Kupcova Skalnikova, Jana Cizkova, Jakub Cervenka, Petr Vodicka
Melanoma is a skin cancer with permanently increasing incidence and resistance to therapies in advanced stages. Reports of spontaneous regression and tumour infiltration with T-lymphocytes makes melanoma candidate for immunotherapies. Cytokines are key factors regulating immune response and intercellular communication in tumour microenvironment. Cytokines may be used in therapy of melanoma to modulate immune response. Cytokines also possess diagnostic and prognostic potential and cytokine production may reflect effects of immunotherapies...
December 13, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29232456/susceptibility-to-measles-in-migrant-population-implication-for-policy-makers
#19
Giancarlo Ceccarelli, Serena Vita, Elisabetta Riva, Eleonora Cella, Maurizio Lopalco, Francesca Antonelli, Marina De Cesaris, Marta Fogolari, Giordano Dicuonzo, Massimo Ciccozzi, Silvia Angeletti
Background: Despite a large measles outbreak is taking place in WHO European region, currently no data are available on measles immunization coverage in the asylum seeker and migrants hosted in this area. Methods: Two hundred and fifty-six migrants upon their arrival in Italy on March, April and May 2016 were screened for measles virus IgG antibodies by chemiluminescence immunoassay (Liaison XL analyzer, Diasorin, Italy). The virus susceptibility in this cohort, the differences between the official country reported and the observed measles immunization coverage and the impact of current measles outbreak on the asylum seekers hosted in the largest Asylum Seeker centres of Italy, were evaluated...
January 1, 2018: Journal of Travel Medicine
https://www.readbyqxmd.com/read/29221733/diagnostic-performance-of-commercial-serological-assays-measuring-bordetella-pertussis-igg-antibodies
#20
Giorgio Fedele, Pasqualina Leone, Stefania Bellino, Ilaria Schiavoni, Claudia Pavia, Tiziana Lazzarotto, Paola Stefanelli
Due to their specificity to B. pertussis antigens, immunoglobulin G (IgG) antibodies should be measured primarily for diagnosing pertussis. We compared the diagnostic performance of commercially available enzyme-linked immunosorbent assays (ELISAs) and chemiluminescent immunoassays (CLIAs) measuring IgG to B. pertussis antigens. An in-house ELISA with purified pertussis toxin (PT) was used as reference system. Commercial assays using PT only as coating antigen showed better performance as compared to those using a mixture of different antigens...
November 13, 2017: Diagnostic Microbiology and Infectious Disease
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