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11 protocols using ax sym hcv 3

1

HCV Antibody and RNA Detection

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Ax SYM HCV 3.0 (Abbott Laboratories, Wiesbaden-Delkenheim, Germany) was used to identify patients seropositive for anti-HCV antibody. The HCV-RNA values were detected by Cobas TaqMan HCV assay (Roche Diagnostics, Indianapolis, USA) according to the manufacturer’s instructions. Other serum biochemical indexes were measured by automated biochemical analyzer (Hitachi, Japan).
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2

Serum ALT and Anti-HCV Assays

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Serum ALT level was measured by a Hitachi 747 auto-analyzer (Hitachi Ltd.,Tokyo, Japan). In 2004, anti-HCV test was assessed by ELISA utilizing a SP-NANBASE C-96 3.0 plate (General Biological Corp.,Hsinchu, Taiwan). From 2005 to 2011, the anti-HCV test was assessed utilizing Abbott AxSYM HCV 3.0, and the Micro-Enzyme-Immunoassay Analysis (MEIA) was conducted (Abbott, IL, USA). Levels of HCV RNA were detected using a Cobas AmpliPrep/Cobas TaqMan HCV kit (Amplicor, Roche Diagnostics, Branchburg, NJ), with a lower limit of detection of 15 IU/ml.
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3

Acute Hepatitis A Infection Screening

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To detect acute hepatitis A infection, serum samples from pediatric patients diagnosed with hepatitis were screened for the presence of anti-HAV IgM and the absence of anti-HAV IgG. All samples were negative for antibodies to HBV, HCV, and HEV. The presence of anti-HAV IgM and the absence of anti-HAV IgG, the surface antigen of HBV (HBsAg), and anti-HCV antibodies were tested by using a third-generation microparticle immunoenzymatic assay (AxSYM HAVAB-M 2_0, AxSYM HBsAg (V2), and AxSYM HCV 3.0; Abbott Laboratories, Chicago, IL) with an AxSYM analyzer (Abbott Laboratories). Total anti-hepatitis B core antigen anti-HBc (total IgM and IgG) and anti-HEV antibodies were measured by using immunoenzymatic assays (Monolisa Anti-HBc PLUS, Bio-Rad Laboratories, Chicago, IL, MP Diagnostics, Geneva, Switzerland and MyBiosource, San Diego, CA, USA, resp.) with a PR 3100 TSC analyzer (Bio-Rad). The levels of albumin/globulin, ALT, AST, alkaline phosphatase, total protein, total BR, and CB were measured in the serum samples, following routine clinical laboratory procedures.
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4

Hepatitis C Diagnosis Protocol

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Patients with CHC were diagnosed by elevated levels of ALT and higher titers of anti-HCV, established by third-generation enzyme immunoassay (AxSym HCV 3.0; Abbott Laboratories, Abbott Park, IL, USA). Also, HCV RNA as a measure of diagnosis was reported qualitatively using a nested polymerase chain-reaction Qiagen RNA-extraction kit (Thermo Fisher Scientific, Waltham, MA, USA) and quantitatively using Smart Cycler II real-time polymerase chain reaction (Cepheid, Sunnyvale, CA, USA) with HCV RNA-quantification kits (Sacace Biotechnologies, Como, Italy) for estimation of HCV RNA-positive subjects, as previously described.37 (link),38 (link) In addition, reverse hybridization was performed to identify HCV genotypes using a line-probe assay (Inno-LiPA HCV II kit; Innogenetics, Ghent, Belgium).39 (link)
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5

Liver Biopsy Blood Marker Analysis

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For all subjects, blood markers were performed on the day of biopsy or within 5 days after liver biopsy. Serum AST, ALT, total bilirubin, and albumin were performed using Max Discovery™ Color Endpoint Assay kits (Cat. No.BO-5605-01 and BO-3460-08, Bioo Scientific Co., USA). α-Fetoprotein (AFP) and tumor necrosis factor-alpha (TNF-α) were estimated in the serum of all participants by using a sandwich ELISA assay and immune assay kits (AFP; R&D Systems, USA; TNF-α; BD Biosciences, USA, respectively). In addition, HCV antibody (anti-HCV) and HCV-RNA were estimated in patients with chronic HCV by using third-generation enzyme immunoassay (EIA) (Axsym HCV 3.0, Abbott Laboratories, Chicago, IL) and an in-house direct reverse transcriptase-polymerase chain reaction (RT-PCR) assay, respectively. Also, HCV genotypes were identified by a reverse hybridization method using Line Probe assay (INNO-LiPA HCV II kit, Innogenetics, Zwijndrecht, Belgium). The data were interpreted according to the manufacturer's instructions.
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6

Hematological and Biochemical Indicators in Fasting State

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Hematological indicators were measured using hematology analyzers (UniCel DxH 800; Beckman Coulter, Brea, CA). The biochemical indicators included FPG, hemoglobin A1c (HbA1c), serum uric acid (UA), total cholesterol (TC), triglyceride (TG), high-density lipoprotein (HDL) cholesterol, low-density lipoprotein cholesterol, aspartate aminotransferase (AST), alanine aminotransferase (ALT), γ-glutamyl transferase (GGT), and alkaline phosphatase. All of these serum biochemical markers were measured using a Hitachi 7600 Automatic Biochemical Analyzer (Hitachi, Tokyo Ibaraki, Japan). The HbA1c was analyzed using a Premier Hb9210 HbA1c Analyzer (Bray, Ireland/Kansas City, MO). Hepatitis B surface antigen was measured by radioimmunoassay kits (Ausria II-125; Abbott Laboratories, North Chicago, IL), and anti-hepatitis C antibody was measured by microparticle enzyme immunoassay (Ax SYM HCV III; Abbott Laboratories). All blood samples were obtained after an 8-hour overnight fast. The FLI was calculated using the following formula:
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7

Diagnosis and Monitoring of HCV Infection

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Anti-HCV antibody was determined by the third generation, commercially available immunoassay (Ax SYM HCV III; Abbott Laboratories, North Chicago, IL). HCV RNA viral loads and genotype were determined by real-time PCR assays [RealTime HCV; Abbott Molecular, Des Plaines IL, United States; detection limit: 12 IU/mL])[22 (link)]. Liver cirrhosis was defined by the presence of clinical, radiological, endoscopic or laboratory evidence of cirrhosis and/or portal hypertension or fibrosis-4 index (FIB-4) (> 6.5). Laboratory data monitoring and assessment of side effects were performed at treatment wk 2, 4, 8 and end-of-treatment (EOT), and 12 wk after EOT.
The primary endpoint was sustained virological response (SVR12, defined as undetectable HCV RNA throughout 12 wk of the post-treatment follow-up period).
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8

Quantifying HIV Markers and Hepatitis Serology

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Plasma HIV RNA load was quantified using the Cobas Amplicor HIV-1 Monitor test (Cobas Amplicor version 1.5, Roche Diagnostics Corporation, IN) with a lower detection limit of 40 copies/mL, and CD4 count was determined using FACFlow (BD FACS Calibur, Becton Dickinson, CA). Anti-hepatitis A virus antibodies were determined using chemiluminescence immunoassay (CIA) (Abbott Diagnostics: CMIA-ARCHITECT i-2000); hepatitis B surface antigen (HBsAg), anti-HBs antibody, and hepatitis B core antibody (anti-HBc antibody) using enzyme immunoassay (Abbott Laboratories, Abbott Park, IL); and antibodies to hepatitis C virus using a third-generation enzyme immunoassay (Ax SYM HCV III, Abbott Laboratories, North Chicago, IL). NAT1 and NAT2 acetylator types were determined with the use of polymerase-chain-reaction (PCR) restriction fragment length polymorphism to differentiate common single-nucleotide polymorphisms (SNPs) predictive of the acetylator phenotypes [16] (link), [17] (link).
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9

HCV Antibody and RNA Detection

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Anti-HCV antibody was determined by the third generation, commercially available ELISA kit (Ax SYM HCV III; Abbott Laboratories, North Chicago, IL). Both the serum HCV RNA and genotypes were assessed by real-time PCR assays (low limit of detection: 12 IU/ml, RealTime HCV; Abbott Molecular, Des Plaines IL, USA)14 (link).
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10

Comprehensive Metabolic Profiling in Cohort Study

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Hematological indicators were measured using a hematology analyzer (UniCel DxH 800; Beckman Coulter, Brea, CA, USA). Biochemical indicators included fasting plasma glucose, hemoglobin A1c (HbA1c), serum uric acid, total cholesterol, triglyceride levels, high density lipoprotein-cholesterol (HDL-C); low density lipoprotein-cholesterol(LDL-C), aspartate aminotransferase, alanine aminotransferase, GGT, and alkaline phosphatase levels. All serum biochemical markers were measured using a Hitachi 7600 Automatic Biochemical Analyzer (Hitachi, Tokyo, Japan). Serum HbA1c levels were analyzed using a Premier Hb9210 HbA1c Analyzer (Bray, Ireland, Kansas City, MO, USA). Hepatitis B surface antigen was measured using radioimmunoassay kits (Ausria II-125; Abbott Laboratories, North Chicago, IL, USA) and anti-hepatitis C antibody was measured using a microparticle enzyme immunoassay (Ax SYM HCV III; Abbott Laboratories). All blood samples were obtained after an 8-h overnight fast.
The overall dataset (n = 2325) was randomly divided into two groups: the training dataset (n = 1162) and validation cohort (n = 1163).
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