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Decrease in viral load at weeks 12 and 24 in patients with chronic hepatitis B treated with lamivudine or adefovir
E Llop1, J de la Revilla, F Pons
1Service of Gastroenterology and Hepatology, University Hospital Puerta de Hierro, Madrid, Spain.
Revista Espanola De Enfermedades Digestivas
|December 17, 2009
Summary
Early viral load decrease predicts long-term treatment success in chronic hepatitis B patients. A 30% reduction at 3 months or 1 log reduction at 6 months indicates a high likelihood of sustained antiviral response.
Area of Science:
- Hepatology
- Virology
- Pharmacology
Background:
- Chronic hepatitis B (CHB) is a significant global health concern.
- Antiviral therapies aim to suppress hepatitis B virus (HBV) replication.
- Predicting treatment response is crucial for optimizing patient management.
Purpose of the Study:
- To evaluate the predictive value of early viral load (VL) reduction for one-year antiviral treatment response in CHB patients.
- To identify specific VL decrease thresholds that predict virological response (VR).
Main Methods:
- Retrospective review of 66 CHB patients treated with lamivudine (LAM) or adefovir (ADF).
- Measurement of viral DNA at 1, 3, and 6 months post-treatment initiation.
- Analysis using Receiver Operating Characteristic (ROC) curves to determine predictive cutoffs.
Main Results:
- In the LAM group, a 30% VL decrease at 3 months predicted VR with 80% negative predictive value (NPV).
- In the ADF group, a 1-log VL decrease at 6 months had 80% NPV, and a 20% VL decrease had 100% NPV.
- Higher baseline VL was associated with non-response in both treatment groups.
Conclusions:
- Early reduction in viral DNA levels at 12 and 24 weeks can reliably predict one-year virological response in CHB patients.
- These findings support the use of early VL kinetics to guide and optimize antiviral therapy for CHB.
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