Abstract:
:HBV (hepatitis B virus) genotyping is important in determining the clinical manifestation of disease and treatment response, particularly, in patients with low viral loads. Also, sensitive detection of HBV antiviral drug resistance mutations is essential for monitoring therapy response.Asensitive direct sequencing method for genotyping and the drug resistance mutation detection of low levels of HBV DNA in patients' plasma is developed by PCR amplification of the DNA with novel universal primers.The novel, common, and universal primers were identified by alignment of RT region of all the HBV DNA sequences in databases. These primers could efficiently amplify the RT region of HBV virus at low DNA levels by directly sequencing the resulting PCR products, and mapping with the reference sequence made it possible to clearly obtain the HBV subtypes and identify the resistance mutations in the samples with HBV DNA level as low as 20 IU/mL. We examined the reliability of the method in clinical samples, and found it could detect the HBV subtypes and drug resistance mutations in 80 clinical HBV samples with low HBV DNA levels ranging from 20 to 200 IU/mL.This method is a sensitive and reliable direct sequencing method for HBV genotyping and antiviral drug resistance mutation detection, and is helpful for efficiently monitoring the response to therapy in HBV patients.
journal_name
Medicine (Baltimore)journal_title
Medicineauthors
Tong Y,Liu B,Liu H,Zheng H,Gu J,Liu H,Lin M,Ding Y,Song C,Li Ydoi
10.1097/MD.0000000000004618subject
Has Abstractpub_date
2016-08-01 00:00:00pages
e4618issue
33eissn
0025-7974issn
1536-5964pii
00005792-201608160-00052journal_volume
95pub_type
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