目的 对一种国产丁型肝炎病毒核酸定量试剂（简称“国产HDV RNA试剂”）进行质量评估和初步临床应用探索。 方法 基于Bio-Rad CFX Opus 96实时荧光定量PCR分析系统的国产HDV RNA试剂对WHO HDV RNA国际标准品系列稀释样本进行分析，对国产HDV RNA试剂的灵敏度和准确度进行评价，并将人工合成的假病毒或病毒培养物稀释后用于国产HDV RNA试剂线性范围评价；采用国产HDV RNA试剂对HAV、HBV、HCV感染的阳性样本以及HEV国家参考品进行分析，对其特异性进行评价；用国产HDV RNA试剂测试高、低两个水平的样本，进行精密度评价；用基于ABI 7500 FAST DX荧光定量PCR仪的RoboGene HDV RNA作为对比试剂与国产HDV RNA试剂平行检测30例丁型肝炎病毒抗体IgG（HDV IgG）阳性样本，采用Pearson相关系数（r）评价2种试剂的相关性。 结果 国产HDV RNA试剂的灵敏度为6 IU/ml，与对比试剂宣称的灵敏度一致；对WHO HDV RNA标准品的标定曲线的斜率为-3.286，扩增效率为101.6%，对8种HDV基因型的线性检测范围为10~108 IU/ml；与HAV、HBV、HCV和HEV不发生交叉反应；对5个浓度水平样本的准确度评价符合要求，对高、低两个水平样本的批内精密度变异系数在1.20%~4.20%，批间精密度变异系数在1.20%~7.90%。对HDV IgG阳性样本的检测结果与对比试剂一致（r=0.984，P<0.001），与测序结果比较准确率为100%。 结论 本研究中国产HDV RNA试剂表现出较好的特异性、准确度、精密度和较宽的线性范围，灵敏度达到国际同类型试剂的水平。 Objective This study aims to evaluate the quality and explore the preliminary clinical applications of a domestically developed hepatitis D virus nucleic acid quantification reagent (abbreviated as"domestic HDV RNA reagent"). Methods The sensitivity and accuracy of the reagent were evaluated in accordance with the WHO HDV RNA international standard, employing the Bio-Rad CFX Opus 96 real-time fluorescence quantitative PCR analysis system. Serial dilutions of pseudo-viruses or cell culture-derived virus were used to determine the linear range of the domestic HDV RNA reagent. Specificity was assessed using positive samples of HAV, HBV, HCV infection, and HEV national reference materials. Precision was evaluated with samples at both high and low concentrations. In a comparative analysis, 30 HDV IgG positive samples were tested using both the domestic HDV RNA reagent and the RoboGene HDV RNA kit based on the ABI 7500 FAST DX system. The Pearson correlation coefficient (r) was used to examine the correlation between the two reagents. Results The domestic HDV RNA reagent demonstrated a high sensitivity of up to 6 IU/ml, consistent with that of the comparator reagent. The calibration curve for WHO HDV RNA standards had a slope of -3.286, with an amplification efficiency of 101.6%. The linear detection range spanned from 10 to 108 IU/ml for eight HDV genotypes. The domestic HDV RNA reagent exhibited exceptional specificity, without cross-reactivity observed with HAV, HBV, HCV, or HEV. Accuracy assessments at five concentration levels met the required standards, with intra-assay precision coefficient of variation (CV) ranging from 1.20% to 4.20%, and inter-assay precision CV from 1.20% to 7.90%. The detection results for HDV IgG positive samples were highly correlated with the comparator reagent (r=0.984, P<0.001), achieving a diagnostic accuracy of 100% compared to sequencing results. Conclusion In this study, the domestic HDV RNA reagent possesses excellent specificity, accuracy, precision, and a broad linear range, attaining a sensitivity level on par with international reagents of the same type.
Abstract
Objective This study aims to evaluate the quality and explore the preliminary clinical applications of a domestically developed hepatitis D virus nucleic acid quantification reagent (abbreviated as"domestic HDV RNA reagent"). Methods The sensitivity and accuracy of the reagent were evaluated in accordance with the WHO HDV RNA international standard, employing the Bio-Rad CFX Opus 96 real-time fluorescence quantitative PCR analysis system. Serial dilutions of pseudo-viruses or cell culture-derived virus were used to determine the linear range of the domestic HDV RNA reagent. Specificity was assessed using positive samples of HAV, HBV, HCV infection, and HEV national reference materials. Precision was evaluated with samples at both high and low concentrations. In a comparative analysis, 30 HDV IgG positive samples were tested using both the domestic HDV RNA reagent and the RoboGene HDV RNA kit based on the ABI 7500 FAST DX system. The Pearson correlation coefficient (r) was used to examine the correlation between the two reagents. Results The domestic HDV RNA reagent demonstrated a high sensitivity of up to 6 IU/ml, consistent with that of the comparator reagent. The calibration curve for WHO HDV RNA standards had a slope of -3.286, with an amplification efficiency of 101.6%. The linear detection range spanned from 10 to 108 IU/ml for eight HDV genotypes. The domestic HDV RNA reagent exhibited exceptional specificity, without cross-reactivity observed with HAV, HBV, HCV, or HEV. Accuracy assessments at five concentration levels met the required standards, with intra-assay precision coefficient of variation (CV) ranging from 1.20% to 4.20%, and inter-assay precision CV from 1.20% to 7.90%. The detection results for HDV IgG positive samples were highly correlated with the comparator reagent (r=0.984, P<0.001), achieving a diagnostic accuracy of 100% compared to sequencing results. Conclusion In this study, the domestic HDV RNA reagent possesses excellent specificity, accuracy, precision, and a broad linear range, attaining a sensitivity level on par with international reagents of the same type.
关键词
丁型肝炎病毒/RNA病毒/逆转录实时荧光聚合酶链式反应/诊断/质量评价
Key words
Hepatitis D virus/RNA virus/RT-qPCR/Diagnosis/Quality evaluation
万方数据