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本帖最后由 StephenW 于 2013-8-2 22:14 编辑
陳益程 Yi-Cheng Chen 胃腸肝膽科系 肝臟科
長庚醫療財團法人 林口長庚紀念醫院
在亚洲的乙肝病毒感染乙肝表面抗原定量的自然病程中的作用
The Role of HBsAg Quantification in the Natural Course
of HBV Infection in Asia
Yi-Cheng Chen & Yun-Fan Liaw
Published online: 4 June 2013
# Springer Science+Business Media New York 2013
HBsAg Levels in Different Phases of Chronic Hepatitis B
There are longitudinal and cross-sectional studies on serum
HBsAg and HBV DNA levels in different phases of chronic
hepatitis B. During the natural course of chronic hepatitis B,
both serum HBV DNA and HBsAg levels decrease gradually
from immune tolerance to low replicative phase. In a
longitudinal study in Hong Kong [9•], serum HBsAg and
HBV DNA levels remained as high as 5 log10 IU/mL and
7.5–8 log10 IU/mL, respectively, during 8-year follow-up
period in immune tolerance phase. One cross-sectional
study in Taiwan recruiting 251 HBV infected patients
showed HBsAg level of 3.65 log10 IU/mL and HBV DNA
of 6 log10 IU/mL in immune tolerance phase [12]. Another
cross-sectional study recruiting 220 treatment-naïve Asian
patients revealed HBsAg level at 4.5 log10 IU/mL and HBV
DNA at 8.2 log10 IU/mL [10]. In the immune clearance
phase, the HBsAg level decreased to 3.5–4 log10 IU/mL
and HBV DNA to 6–7 log10 IU/mL in the longitudinal study
[9•]. The HBsAg and HBV DNA levels usually decline
slightly when immune tolerance phase proceeding to immune
clearance phase. When HBeAg seroconversion occurred
during the immune clearance phase, the HBV DNA
levels decreased further but the HBsAg level remained
steady [9•]. During the HBeAg-negative stage, the HBsAg
and HBV DNA level in the inactive phase was 1.5–2.2 and
2–2.5 log10 IU/mL, respectively, in contrast to 2.5–3 and 4–
5 log10 IU/mL, respectively, in those with HBV reactivation
[9•]. The corresponding figures of HBsAg and HBV DNA
levels in Taiwanese and Asian prospective cross-sectional
studies [10, 12] are consistent with the longitudinal data
[9•]. The gradual changes in HBsAg and HBV DNA levels
were similar to the results in a cross-sectional study of
European prospective [13]. The HBsAg levels in difference
phases of chronic HBV infection are summarized in Table 1
based on the Asian studies as mentioned above.
The correlation between serum HBsAg and HBV DNA
levels was variable in different studies. In one study of 67
asymptomatic HBV carriers, the patients were stratified into
HBeAg-positive with HBV DNA >4x106 IU/mL and
HBeAg-negative with HBV DNA >20000, 200–20000
and <200 IU/mL. The corresponding HBsAg levels were
4.83, 3.22, 2.93 and 2.68 log10 IU/mL, respectively [18]. The
results showed a positive correlation between HBV DNA and
HBsAg levels in both HBeA-positive and HBeAg-negative
status. In another cross-sectional study, 251 patients were
divided into groups of immune tolerance, immune clearance,
inactive carrier and reactivation phases based on the natural
course. The correlation of HBsAg and HBV DNA levels was
higher in the immune tolerance, immune clearance and
reactivation phases, but lowest in the inactive phase [12]. The
overall analysis in the longitudinal study of 117 patients
showed a moderate correlation between serum HBsAg and
HBV DNA levels (r=0.61, p<0.001), being better in HBeAg
positive patients (r=0.66, p<0.001) than that in HBeAg negative
patients (r=0.41, p<0.01) [9•]. In the study of Asian
prospective [10], there was a modest correlation observed in
immune clearance phase (r=0.77, p=0.0001), but poor correlation
in immune tolerance (r=0.30, p=0.09), low-replicative
(r=0.22, p=0.11) and HBeAg-negative hepatitis phases
(r=0.29, p=0.008). Overall, the correlation between HBsAg
and HBV DNA levels is mostly positive in HBeAg-positive
patients but poor in HBeAg-negative status [9•, 19]. The
distribution of HBsAg levels between genotype B and C
was similar in different phases of natural course except that
serum HBsAg level in low-replicative phase was lower (2.24
log10 IU/mL) in genotype B as compared to genotype C (3.34
log10 IU/mL) in one study [10]. However, it should be
interpreted cautiously as some patients had insufficient HBV
DNA to determine the genotype.
Table 1 Levels of HBsAg and HBV DNA during the natural course of chronic hepatitis B
Immune tolerance phase Immune clearance phase Immune control/inactive carrier Reactivated HBeAg-negative disease Reference
HBsAg level (log10 IU/mL)
4.9–5.0 3.5–4.0 1.5–2.2 2.5–3.0 [9•]
4.53 4.03 2.86 2.86 [10]
3.65 3.81 2.52 2.77 [12]
4.96 4.37 3.09 3.86 [13]
HBV DNA level (log10 IU/mL)
7.5–8 6.0–7.0 2.0–2.5 4.0–5.0 [9•]
8.22 8.02 <2.6 4.95 [10]
6.0 6.57 3.55 4.82 [12]
8.04 7.47 2.54 5.67 [13]
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