Rapid quantification of hepatitis B virus DNA by real-time PCR using efficient TaqMan probe and extraction of virus DNA
Rapid quantification of hepatitis B virus DNA by real-time PCR using efficient TaqMan probe and extraction of virus DNA作者机构：School of Medicine Shandong University Jinan 250012 China Shandong Medicinal Biotechnology Center Shandong Academy of Medical Science Key laboratory of Ministry of Health for Biotech-Drug Jinan 250062 Shandong Province China Shandong Medicinal Biotechnology Center Shandong Academy of Medical Sciences Key Laboratory of Ministry of Health for Biotech-Drugs Jinan 250062 Shandong Province China Jinan Infectious Disease Hospital Jinan 250021 Shandong Province China
出 版 物：《World Journal of Gastroenterology》 (世界胃肠病学杂志（英文版）)
年 卷 期：2006年第12卷第45期
页 面：7365-7370页
核心收录：
学科分类：1002[医学-临床医学] 100201[医学-内科学(含：心血管病、血液病、呼吸系病、消化系病、内分泌与代谢病、肾病、风湿病、传染病)] 10[医学]
基 金：Supported by the National Natural Science Foundation of China(No. 30371328) the Key Project of Natural Science Foundationof Shandong Province (No. Z2002C01) and the Key Project ofShandong Academy of Medical Sciences (No. 2005007)
主 题：Hepatitis B virus Serum DNA Real-time PCR Extraction method
摘 要：AIM： To rapidly quantify hepatitis B virus （HBV） DNA by real-time PCR using efficient TaqMan probe and extraction methods of virus DNA. METHODS： Three standards were prepared by cloning PCR products which targeted S, C and X region of HBV genome into pGEM-T vector respectively. A pair of primers and matched TaqMan probe were selected by comparing the copy number and the Ct values of HBV serum samples derived from the three different standard curves using certain serum DNA. Then the efficiency of six HBV DNA extraction methods including guanidinium isothiocyanate, proteinase K, NaI, NaOH lysis, alkaline lysis and simple boiling was analyzed in sample A, B and C by real-time PCR. Meanwhile, 8 clinical HBV serum samples were quantified. RESULTS： The copy number of the same HBV serum sample originated from the standard curve of S, C and X regions was 5.7 × 10^4/mL, 6.3 × 10^2/mL and 1.6 × 10^3/ mL respectively. The relative Ct value was 26.6, 31.8 and 29.5 respectively. Therefore, primers and matched probe from S region were chosen for further optimization of six extraction methods. The copy number of HBV serum samples A, B and C was 3.49 × 10^9/mL, 2.08 × 10^6/mL and 4.40 × 10^7/mL respectively, the relative Ct value was 19.9, 30 and 26.2 in the method of NaOH lysis, which was the efficientest among six methods. Simple boiling showed a slightly lower efficiency than NaOH lysis. Guanidinium isothiocyanate, proteinase K and NaI displayed that the copy number of HBV serum sample A, B and C was around 10^S/mL, meanwhile the Ct value was about 30. Alkaline failed to quantify the copy number of three HBV serum samples. Standard deviation （SD） and coefficient variation （CV） were very low in all 8 clinical HBV serum samples, showing that quantification of HBV DNA in triplicate was reliable and accurate. CONCLUSION： Real-time PCR based on optimized primers and TaqMan probe from S region in combination with NaOH lysis is a simple, rapid and accurate method for quantificati
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