Traditional Chinese medicine preparation for preventing chronic hepatitis B YMDD (tyrosine, methionine, d-aspartic acid, d-aspartic acid) mutation
Patent Information
- Authority / Receiving Office
- CN ยท China
- Current Assignee / Owner
- ็ๆฐ
- Publication Date
- 2015-07-22
- Estimated Expiration
- Not applicable ยท inactive patent
Abstract
Description
technical field
[0001] The invention relates to a traditional Chinese medicine composition, in particular to a traditional Chinese medicine preparation for preventing YMDD variation of chronic hepatitis B. Background technique
[0002] After the nucleoside analogue lamivudine binds to HBV polymerase in the form of triphosphorylation in vivo, it competes to inhibit the activity of the polymerase, resulting in the termination of HBV DNA chain synthesis. HBVDNA concentration. However, the tyrosine, methionine, aspartate, and aspartate (YMDD) motifs of the HBV DNA polymerase domain C can be mutated after treatment with lamivudine, resulting in HBV evading the effect of lamivudine and developing resistance. Drug strains, so that the clinical efficacy of lamivudine decreased. It is generally believed that the occurrence of YMDD mutations is more common after half a year of treatment with lamivudine, and the YMDD mutation rate is about 25% after 52 weeks of treatment. However, r...