RÉSUMÉ
Objective To compare the effects of TRIzol and magnetic beadsmethods on quantitative detection of hepatitis C virus (HCV) RNA. Methods Serum samples and genotype information of 117 patients with positive HCV infection were collected. HCV RNA was extracted from serum samples by TRIzol method and magnetic bead method, respectively. And then the viral load of HCV RNA was detected by quantitative PCR to compare the difference between the two methods. Results qPCRresults showed that a good linear correlation existed between TRIzol and magnetic beads methods: y=0. 978x+0. 063 (R2=0. 973). Bland-Altman statistical analysis showed that the average logarithmic value of viral load ofHCV RNA extracted by TRIzol method was slightly lower than that of magnetic beads method, without significant difference (P>0. 05). There were no significant difference among the genotypes 1a, 1b, 2a, 3a or 6a between the two methods (P>0. 05). Conclusion TRIzol method is comparable to magnetic beads method in HCV RNA quantitative detection, with less samplevolume and lower cost, indicating that t might be widely used for developing ktt and HCV RNA clinical detection in China.
RÉSUMÉ
This research was aimed to develop a simple, rapid, accurate and non-invasive method by means of flow-through hybridization technology, which can be used for molecular screening and early prenatal diagnosis for detecting common β-thalassemias mutational genotypes. By using PCR technology combined with flow-through hybridization of low-density gene chip technology, the 6 sets of PCR primer single tube multiplex PCR system and 29 types of DNA probes were designed, then the mutational thalassemias in foetus DNA was rapidly detected in total of 60 anaemia pregnant women plasma. The results showed that 4 cases with deletional α-thalassemias, 3 cases with β-thalassemias, 1 case with mixed type of α & β-thalassemias were detected in foetus DNA of 60 pregnant women plasmas. It is concluded that the method presented in this study is easy to handle, rapid, reliable and cost-effective for detecting 3 common deletional α-thalassemias and 17 common mutational β-thalassemia.