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Clinical Laboratory

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https://www.readbyqxmd.com/read/28397483/efficiency-of-leukocyte-differential-using-flow-cytometry-with-cytodiff-in-different-workflows
#1
Chenxue Qu, Jianzhong Wang, Chengwei Pu, Ying Xing, Ke Shang, Ning Dong, Xiufeng Li
BACKGROUND: To set up the review criteria for flow cytometry with CytoDiff (FCC) and evaluate the efficiency of different workflows using combinations of FCC with a hematology analyzer and microscopy. METHODS: Leucocyte differentials of the samples from 995 clinical specimens and 278 specimens from healthy donors were analyzed using a hematology analyzer, FCC, and microscopy. RESULTS: The correlations between the hematology analyzer, FCC, and microscopy were good for neutrophils, lymphocytes, and monocytes, but not in the case of basophils (r = 0...
April 1, 2017: Clinical Laboratory
https://www.readbyqxmd.com/read/28397482/genetic-polymorphism-of-epidermal-growth-factor-rs4444903-influences-susceptibility-to-hcv-related-liver-cirrhosis-and-hepatocellular-carcinoma-in-a-chinese-han-population
#2
Shitian Zhang, Kunyan Qiao, Congdoanh Trieu, Zhixiao Huo, Qinghai Dai, Yanan Du, Wei Lu, Wei Hou
BACKGROUND: Genetic polymorphism in the epidermal growth factor (EGF, rs4444903) gene has been demonstrated to be associated with the clinical deterioration in hepatitis C virus (HCV)-related liver cirrhosis (LC) and the development of hepatocellular carcinoma (HCC). Whether this single nucleotide polymorphism (SNP) influences susceptibility to HCV-related LC and HCC in the Chinese Han population is largely unknown. METHODS: In this case-control study, a total of 187 Chinese Han patients with chronic HCV infection were enrolled, including 62 HCV-related LC patients, 46 HCV-related HCC patients, and 79 chronic hepatitis C (CHC) patients without LC and HCC, and the genetic polymorphism was genotyped via a matrix-assisted laser desorption/ionization time of flight mass spectrometry (MALDI-TOF MS) assay...
April 1, 2017: Clinical Laboratory
https://www.readbyqxmd.com/read/28397481/diagnosis-of-hepatitis-c-virus-infection-using-a-novel-mouse-monoclonal-antibody-to-detect-serum-hcv-e1-e2-antigens
#3
Iman Touni, Ashraf A Tabll, Shaimaa S Sobieh, Maha A Hewedy, Yasmine S El Abd, Sergei Viazov
BACKGROUND: Hepatitis C virus (HCV) is a major cause of liver disease worldwide and in Egypt. The aim of this study was to detect HCV E1/E2 antigens using a novel mouse monoclonal antibody (mAb) designated (7G9) as a diagnostic and alternative approach for HCV detection. METHODS: The detection of HCV-E1/E2 antigens in 138 patients positive for HCV infection tested by RT-PCR and 25 healthy individuals negative for HCV as control group was done by an optimized in-house ELISA and DotELISA (based on the molecular mimicry of E2 to immunoglobulins)...
April 1, 2017: Clinical Laboratory
https://www.readbyqxmd.com/read/28397480/genetic-polymorphism-of-mthfr-c677t-influences-susceptibility-to-hbv-related-hepatocellular-carcinoma-in-a-chinese-population-a-case-control-study
#4
Kunyan Qiao, Shitian Zhang, Congdoanh Trieu, Qinghai Dai, Zhixiao Huo, Yanan Du, Wei Lu, Wei Hou
BACKGROUND: Methylene tetrahydrofolate reductase (MTHFR) is the key enzyme of folic acid metabolism and the C677T mutation is associated with decreased enzyme activity. Several studies have shown its regulatory role in carcinogenesis and tumor growth. HBV (hepatitis B virus)-related HCC (hepatocellular carcinoma) is one of the most common liver cancers worldwide. Therefore, the present case-control study aimed to investigate the role of genetic polymorphism of MTHFR C677T in the development and progression of HBV-related HCC in a Chinese population...
April 1, 2017: Clinical Laboratory
https://www.readbyqxmd.com/read/28397479/estimation-of-diagnostic-markers-in-rheumatoid-arthritis-and-ankylosing-spondylitis
#5
Nasrin Dashti, Zahra Javadi, Fatemeh Safari, Solmaz Farahvash, Mitra Zarebavani
BACKGROUND: Laboratory examination is a great value to confirm a diagnosis and estimate disease activity of Rheumatoid Arthritis (RA) and Ankylosing Spondylitis (AS). Since little research related to the diagnosis of RA and AS has been done in Iran, the aim of the present study was to evaluate the diagnosis markers in patients with RA and AS. METHODS: This study was conducted among 104 patients with RA and 42 patients with AS in Iran during 2016. Inclusion criteria were according to the American College of Rheumatology (ACR) and European League against Rheumatism (EULAR) criteria...
April 1, 2017: Clinical Laboratory
https://www.readbyqxmd.com/read/28397478/point-of-care-cardiac-troponin-assay-analytical-performances-for-their-use-in-clinical-routine
#6
Anne M Dupuy, Solenne Baillet, Richard Dumont, Isabelle Giraud, Stephanie Badiou, Anne S Bargnoux, Nils Kuster, Francois Roubille, Jean Paul Cristol
BACKGROUND: We report the analytical and clinical performances of the Alere Triage Cardiac3© Panel on the Triage MeterPro© instrument, comparing concordance with hs-cTnT results from central laboratory above the respective 99th percentiles and determining the clinical sensitivity within the framework of AMI. METHODS: The concordance was obtained with these two methods among unselected patients admitted to both the emergency and cardiology departments. RESULTS: The LoD of the assay is 0...
April 1, 2017: Clinical Laboratory
https://www.readbyqxmd.com/read/28397477/real-time-pcr-detection-of-the-most-common-bacteria-and-viruses-causing-meningitis
#7
Oya Akkaya, Hulya Iren Guvenc, Serife Yuksekkaya, Aysegul Opus, Asuman Guzelant, Meral Kaya, Muhammet Guzel Kurtoglu, Nurettin Kaya
BACKGROUND: Central nervous system (CNS) infections require prompt diagnosis, as the clinical condition progresses rapidly and may lead to severe permanent sequelae or death. The causative agents include viruses, bacteria, fungi, and parasites. In this study, samples with the diagnosis of CNS infection based on cerebrospinal fluid (CSF) sent to us from other hospitals/labs, were studied by multiplex real-time Polymerase Chain Reaction (PCR) method. The purpose of this study is to demonstrate, retrospectively, the most common bacteria and viruses causing meningitis and seasonal distribution of these agents using the multiplex real-time PCR method in CSF samples...
April 1, 2017: Clinical Laboratory
https://www.readbyqxmd.com/read/28397476/enforced-mir-144-3p-expression-as-a-non-invasive-biomarker-for-the-acute-myeloid-leukemia-patients-mainly-by-targeting-nrf2
#8
Xuelin Sun, Dejun Liu, Yuan Xue, Xin Hu
BACKGROUND: MicroRNAs (miRNAs) are endogenous non-coding RNAs of 19-25 nucleotides in length. Abnormal miRNA expression has been identified in various types of cancer. However, the aberrant expression of miR-1244 has not been reported in acute myeloid leukemia. METHODS: First, the expression of miR-144-3p was explored in the bone marrow and peripheral blood of AML patients and healthy control. Then, we also evaluated the level of miR-144-3p in HL-60 cells. The possible target gene of miR-144-3p was predicted using TargetScan...
April 1, 2017: Clinical Laboratory
https://www.readbyqxmd.com/read/28397475/evaluation-of-maldi-tof-ms-for-the-identification-of-yeast-isolates-causing-bloodstream-infection
#9
Ozge Turhan, Betil Ozhak-Baysan, Oscar Zaragoza Hernandez, Halil Er, Gozde Ongut, Dilara Ogunc, Dilek Colak, Manuel Cuenca-Estrella
BACKGROUND: Infections due to Candida species are major causes of morbidity and mortality in humans, causing a diverse spectrum of clinical disease ranging from superficial and mucosal infections to invasive disease. Several authors have demonstrated that mortality is closely linked to both timing of therapy and/or source control. The rapid identification of pathogenic species is helpful to start timely and effective antifungal therapy. The aim of this study was to assess the performance of the matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) system for the correct and rapid identification of yeast isolates causing bloodstream infection...
April 1, 2017: Clinical Laboratory
https://www.readbyqxmd.com/read/28397474/evaluation-of-the-three-customized-msi-panels-to-improve-the-detection-of-microsatellite-instability-in-gastric-cancer
#10
Joonhong Park, Soyoung Shin, Han Mo Yoo, Seung-Woo Lee, Jeong Goo Kim
BACKGROUND: We designed and evaluated the suitability of three customized microsatellite instability (MSI) panels using a combination of mono- and dinucleotide markers to improve the detection of MSI status in 56 matched normal and gastric cancer specimens. METHODS: An MSI analysis was performed to optimize the panel of microsatellite markers to detect instability using two different microsatellite panels: (1) mononucleotide marker panel consisting of mononucleotide markers BAT25, BAT26, BAT40, BAT-RII, NR21, NR22, NR24, and NR27 and (2) dinucleotide marker panel containing D2S123, D5S346, D17S250, D17S261, D17S520, D18S34, and D18S58...
April 1, 2017: Clinical Laboratory
https://www.readbyqxmd.com/read/28397473/factors-contributing-to-false-negative-enzyme-linked-immunospot-assay-for-interferon-gamma-results-in-active-tuberculosis
#11
Guoli Lian, Fangxiong Du, Hongyan Wu, Min He, Zhigang Liu
BACKGROUND: The enzyme-linked immunospot assay test (T-SPOT.TB) is effective for detecting TB, but there are still some persons with tuberculosis (TB) who have negative results. The aim of this study was to analyze the factors that contribute to false negative results in active TB patients. METHODS: We investigated the clinical trial and laboratory data of the active TB patients hospitalized in the First Affiliated Hospital of Xi'an Jiaotong University from May 2013 to November 2014...
April 1, 2017: Clinical Laboratory
https://www.readbyqxmd.com/read/28397472/comparison-of-novel-blood-culture-system-dl-bt112tm-with-bact-alert-3dtm-by-using-clinical-samples
#12
Mustafa Altindis, Tayfur Demiray, Mehmet Koroglu, Umit Kilic, Aybala Neslihan Alagoz, Aziz Ogutlu, Oguz Karabay
BACKGROUND: Blood cultures are the main diagnostic laboratory tool to detect bloodstream infections. Many clinical microbiology laboratories utilize automated blood culture systems to isolate infectious agents from blood samples. The diagnostic performance and time-to-detection values of the novel automated blood culture system, DLBt112TM (DL), was compared with BacT/Alert 3DTM (B3D) in this prospective comparative study with clinical samples. METHODS: A total of 356 blood culture sets (178 sets for each system) were evaluated over a 6-month period in a university hospital...
April 1, 2017: Clinical Laboratory
https://www.readbyqxmd.com/read/28397471/interactions-of-methylenetetrahydrofolate-reductase-gene-polymorphisms-folate-and-homocysteine-on-blood-pressure-in-a-chinese-hypertensive-population
#13
Wen-Xing Li, Peng Liao, Chao-Yue Hu, Fei Cheng, Tao Zhang, Yuan-Yuan Sun, Ling Tang, Man-Man Wang, Kui-Sheng Liu, Dahai Liu, Fang Liu
BACKGROUND: High blood pressure is related to cardiovascular diseases. We aimed to explore the interactions of methylenetetrahydrofolate reductase (MTHTR) gene C677T and A1298C mutations and folate/homocysteine (Hcy) status on blood pressure in a Chinese hypertensive population. METHODS: The clinical data in the present study derived from a previous trial (NCT00520247). Genotypes in Hcy pathway enzymes were detected by PCR-RFLP methods. Supine blood pressure was measured with a mercury sphygmomanometer...
April 1, 2017: Clinical Laboratory
https://www.readbyqxmd.com/read/28397470/matrix-assisted-laser-desorption-ionization-time-of-flight-mass-spectrometry-maldi-tof-ms-for-early-identification-of-septic-patients
#14
Ali O Sekercioglu, Yesim Cekin, Dilara Ogunc, Gozde Ongut, Betil O Baysan, Dilek Colak, Filiz Gunseren, Levent Donmez
BACKGROUND: Matrix-assisted laser desorption-ionization time-of-flight mass spectrometry (MALDI-TOF MS) is a powerful technique for the rapid identification of bacteria from growing colonies in routine cultures. In this study, we evaluated the feasibility of a 5-hour incubation on solid medium after sub-cultivation of positive blood culture broth without any preparation steps in order to speed up the identification of bacteria. METHODS: In addition to standard laboratory protocols, a Columbia agar plate with 5% sheep blood was inoculated with 1 drop from the blood culture broth...
April 1, 2017: Clinical Laboratory
https://www.readbyqxmd.com/read/28397469/intracellular-storage-of-duffy-antigen-binding-chemokines-by-duffy-positive-red-blood-cells
#15
Ayako Yamamoto, Norihiro Saito, Shu Ogasawara, Toshihiro Shiratori, Jun Kondo, Masamichi Itoga, Hiroyuki Kayaba
BACKGROUND: Duffy antigen/chemokine receptor (DARC) is a non-signaling receptor for multiple chemokines. The role of DARC on red blood cells (RBCs) has remained elusive. The purpose of this study was to analyze selective storage of DARC-binding chemokines in RBCs. METHODS: Peripheral blood from healthy volunteers with DARC-positive blood type was collected in EDTA tubes. The concentration of DARC binding chemokines (i.e., MCP-1, RANTES, eotaxin-1, TARC, and IL-8), DARC nonbinding chemokines (i...
April 1, 2017: Clinical Laboratory
https://www.readbyqxmd.com/read/28397468/association-of-serum-interleukin-28b-with-clinical-features-laboratory-values-and-radiographic-score-in-rheumatoid-arthritis-patients
#16
Cheng Lv, Qiong-Jie Chang, Feng Zhao, Li-Qi Bi, Ping Li
BACKGROUND: Interleukin-28B (IL-28B) is a member of the interferon lambda family (also known as type III interferons), it has already been studied in many diseases, but it has almost never been studied in rheumatoid arthritis (RA). With this background, we determined the serum levels of IL-28B in RA patients and investigated its clinical significances. METHODS: IL-28B levels were measured by enzyme-linked immunosorbent assay (ELISA) in 80 RA patients and 80 healthy controls...
April 1, 2017: Clinical Laboratory
https://www.readbyqxmd.com/read/28397467/increase-of-c3a-is-associated-with-hemorrhagic-propensity-in-patients-with-immune-thrombocytopenia
#17
Jian Ge, Lihong Wang, Jing Li, Yan Hu, Qianfei Xu, Yang Chen, Ruiqin Hou, Min Ruan, Ruixiang Xia, Qingshu Zeng
BACKGROUND: Complement activation is critically involved in multiple autoimmune diseases. Immune thrombocytopenia (ITP) is a hemorrhagic condition with enhanced platelet clearance caused by antiplatelet autoantibodies. However, the roles of complements C3a, C5a, and soluble C5b-9 (sC5b-9) in the hemorrhage of ITP remain unknown. METHODS: Plasma C3a, C5a, and sC5b-9 levels in ITP patients were measured by enzyme-linked immunosorbent assay (ELISA). Antiplatelet autoantibodies (anti-GPIIb/IIIa and anti-GPIbα) were evaluated by modified monoclonal antibody immobilization of platelet antigen (MAIPA) assay...
April 1, 2017: Clinical Laboratory
https://www.readbyqxmd.com/read/28397466/absolute-eosinophil-count-was-significantly-associated-with-serum-1-3-%C3%AE-d-glucan-in-patients-with-invasive-fungal-infections
#18
Pengfei Zhu, Jun Lv, Yongkui Kong, Hui Xu, Liang Ming
BACKGROUND: Measurement of serum (1,3)-β-D-glucan has emerged as an important diagnostic strategy for invasive fungal infections (IFI). Previous studies suggested that the eosinophil count would be related with the value of serum (1,3)-β-D-glucan. METHODS: 572 blood samples obtained from 126 patients at the First Affiliated Hospital of Zhengzhou University were analyzed. The unsuitable samples were excluded according to the patient selection. RESULTS: In our study, we found that in the 572 cumulative results, the absolute eosinophil count was significantly associated with the value of (1,3)-β-D-glucan (r = 0...
April 1, 2017: Clinical Laboratory
https://www.readbyqxmd.com/read/28397465/variation-of-housekeeping-genes-in-clinical-isolates-and-vaccine-strains-of-bordetella-pertussis
#19
Masoumeh Fathi, Faezeh Haghighi, Fereshteh Shahcheraghi, Ebrahim Abbasi, Seyed Saeed Eshraghi, Sedighe Ghourchian, Hojjat Zeraati, Mehdi Yaseri, Masoumeh Douraghi, Fazel Shokri
BACKGROUND: Bordetella pertussis causes serious contagious infections, primarily in childhood. A whole-cell vaccine, diphtheria-tetanus-whole cell pertussis (DTwP), has been used to protect against pertussis in children in Iran, but the pertussis cases have been increasing during recent years. We determined the allelic variation level of housekeeping genes in isolates recovered from pertussis patients and vaccine strains used in national vaccination program. METHODS: Five clinical isolates, 2 vaccine strains and a Tohama I strain were studied through multilocus sequence typing (MLST) of housekeeping genes...
April 1, 2017: Clinical Laboratory
https://www.readbyqxmd.com/read/28397464/effects-of-ulinastatin-on-in-vitro-storage-lesions-of-human-red-blood-cells
#20
Ding-Hua Liu, Yun-Tai Yao, Li-Huan Li, Chun-Mei Huang
BACKGROUND: The study aimed to investigate the influence of in vitro storage on erythrocyte complement receptor one (E-CR1), cell shrinkage and eryptosis of human red blood cells (RBCs), and to assess the possible effects of ulinastatin (UTI) on them. METHODS: After collection, RBCs were treated with saline (control group) and different concentrations of UTI (5,000 U/mL, 10,000 U/mL, and 50,000 U/mL in Group C1, Group C2, and Group C3, respectively). E-CR1, cell size, and phosphatidylserine (PS) exposure and intracellular Ca2+ concentration were analyzed by flow cytometer every 7 days up to Day 35...
April 1, 2017: Clinical Laboratory
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