Laboratory Medicine ›› 2016, Vol. 31 ›› Issue (11): 944-947.DOI: 10.3969/j.issn.1673-8640.2016.011.004

• Orginal Article • Previous Articles     Next Articles

Comparison of dried blood spot samples and serum samples for HBV DNA quantification determination and drug resistance mutation

ZHANG Min1, WANG Qianying1, LI Xin1, WANG Gang1, HU Yunwen2   

  1. 1. Department of Clinical Laboratory,Shanghai Public Health Clinical Center,Shanghai 201508,China
    2. Emergency Detection and Bio-safety Department,Shanghai Public Health Clinical Center,Shanghai 201508,China
  • Received:2015-12-28 Online:2016-11-30 Published:2016-12-22

Abstract:

Objective To assess the feasibility of dried blood spot(DBS) sample as an alternative to serum sample for hepatitis B virus(HBV)determination. Methods DBS samples and serum samples were prepared through extracting venous blood,and HBV DNA was determined for 100 patients with chronic hepatitis B,whose HBV virus load >1×102 copies/mL. DBS and serum sample results were compared by correlation analysis. HBV genotypes were analyzed in 73 patients of genotype B and genotype C. A total of 56 DBS and serum samples from patients with hepatitis B were collected randomly. Using an in-house nest polymerase chain reaction(PCR) for reverse transcriptase segment,the data were analyzed using geno2pheno. Results HBV DNA of DBS samples was determined in a range of 2-8 log10 copies/mL. The correlation coefficient(r2) for HBV DNA between DBS samples and serum samples was 0.82(P<0.05). The quantification of HBV DNA determination in DBS samples was 1 log10 lower than that in serum samples. The coincidence rate of the 2 kinds of samples was 95.83%. For DBS and serum samples,the determination rates for drug resistance were 82.14% and 85.71%(P>0.05). The coincidence rate of DBS and serum samples for HBV genotype was 100.00%. Conclusions DBS samples can be used in HBV DNA quantification and drug resistance determinations.

Key words: Dried blood spot, Hepatitis B virus, DNA, Drug resistance

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