B型慢性肝炎に対するペグインターフェロ
ン療法の有効性、安全性について
関西労災病院
林 紀夫
緒言
ペグインターフェロン(PEG-IFN)
α-2a は,AASLD, EASL,
APASLのHBV マネジメント ガイドライン
でB型慢性肝炎の治
療に対して第一選択薬として推奨されているが
1-3,本邦では現
在, B型慢性肝炎に対して承認されていない。
核酸アナログ製剤とは異なり, 一定の投与期間で持続的な効
果を示すことが報告されている
4,5。
1. EASL guidelines. J Hepatol 2009; 2. Lok, McMahon. Hepatology 2007 3. Liaw et al. Hepatol Int 2008; 4. Lau et al. NEJM 2005; 5. Lau et al. EASL 2006
HBe抗原陽性での検討
Patients with HBeAg-positive CHB were randomised using a
1:1:1 ratio
ITT population: n=814
lamivudine 100 mg qd
PEGASYS 180
g qw + lamivudine 100 mg qd
PEGASYS 180
g qw + oral placebo qd
0
24
48
24 week
follow-up
72
Study weeks
Randomise
d
End of Treatment
48 weeks
End of Follow-up
72 weeks
0
10
20
30
40
HBeAg Seroconversion
24 Weeks Post-treatment (Week 72)
32%
19%
Pati
e
nts
w
ith
HB
e
A
g
s
e
roc
on
v
e
rsi
on
(%
)
PEGASYS
+ placebo
PEGASYS
+ lamivudine
Lamivudine
27%
n=271 n=271 n=272 P=0.232 (OR = 0.8) P=0.023 (OR = 1.6) P<0.001 (OR = 2.0)0 20 40 60
A
B
C
D
12/23 4/18 3/15 52% 22% 20% 23/76 24/82 17/73 30% 29% 23% 31% 28% 18% 22% 18% 18% 50/162 43/156 29/162 2/9 2/11 3/17Genotype
HBeAg Seroconversion
24 WeeksPost-treatment by Genotype
Pa
tie
nts
w
ith
HB
e
A
g
s
e
roco
nv
e
rsio
n
(%
)
PEGASYS + placebo
PEGASYS + lamivudine
Lamivudine
Follow up
HBe抗原陽性での投与量、投与期間の検討
NEPTUNE
Study
Treatment Group A
PEG-IFN α-2a 90 g/week
Treatment Group C
PEG-IFN α-2a 90 g/week
Treatment Group D
PEG-IFN α-2a 180 g/week
Screening Days -35 to -1
0
24
Weeks
48
Primary endpoint 6 months post-treatment72
Randomization Primary endpoint
6 months post-treatment
Stratified by ALT level and
genotype
Treatment Group B
PEG-IFN α-2a 180 g/week
Follow up
Further Follow up
Follow up
Follow up
HBeAg-positive patients (n=524)
36.2%
HB
eAg seroconversion
90 µg/week
24 weeks
180 µg/week
24 weeks
90 µg/week
48 weeks
180 µg/week
48 weeks
HBeAg
s
e
ro
c
o
n
v
e
rs
io
n
6
m
o
n
th
s
p
o
s
t-tre
a
tm
e
n
t
(%
)
14.1%
22.9%
25.8%
No interaction between dose and duration: P=0.8959
Liaw et al.Hepatology l 2010
e+
100 mg lamivudine qd
180 μg PEGASYS qw + 100 mg lamivudine qd
180 μg PEGASYS qw + oral placebo qd
0
24
48
24 week
follow-up
72
Study weeks
Randomised
EOT
48 weeks
EOT
72 weeks
Patients with HBeAg-negative CHB were randomised
using a 1:1:1 ratio (n=537)
HBe抗原陰性での検討
0
20
40
60
80
59%
44%
P
at
ien
ts
(
%)
PEGASYS
+ placebo
PEGASYS
+ lamivudine
Lamivudine
60%
n=177
n=179
n=181
P=0.004
P=0.915
P=0.003
Co-primary Endpoint –
ALT Normalisation
24 Weeks Post-treatment (Week 72)
24 Weeks Post-treatment (Week 72)
0
20
40
60
P
at
ien
ts
(
%)
n=177
n=179
n=181
43%
29%
44%
P=0.849
P=0.003
P=0.007
PEGASYS
+ placebo
PEGASYS
+ lamivudine
Lamivudine
Co-primary Endpoint –
HBV DNA <20,000 cp/mL
0
20
40
60
36%
38%
23%
P
at
ien
ts
(
%)
PEGASYS
+ placebo
PEGASYS
+ lamivudine
Lamivudine
n=177 n=179 n=181P=0.612
P=0.002
P=0.011
*Combined response defined as ALT normalisation and HBV DNA <20,000 cp/mL
Combined Response*
24 Weeks Post-treatment (Week 72)
HBe抗原陰性での長期フォロー
1. Marcellin et al. N Engl J Med 2004 2. Marcellin et al. Gastroenterology 2009 3. Marcellin et al. APASL and EASL 2009 CHB: chronic hepatitis B
EOT: end of treatment
HBeAg: hepatitis B ‘e’ antigen ITT: intent to treat
Lamivudine 100 mg qd PEGASYS 180 µg qw + lamivudine 100 mg qd PEGASYS 180 µg qw + placebo qd
Initial study
1EOT
(
week 48
)
Post treatment
(
6 months
)
Long-term study
2,3Post-treatment
(
5 years
)
Baseline
ITT population: N=537 Modified ITT population (PEG+LAM): N=230
11/230
5%
1
14/2306%
2
20/2309%
3
25/23011%
4
28/23012%
5
Follow up (years)
0
2
4
6
8
10
12
14
HBsAg Clearance
Marcellin et al.Gastroenterology 2009Pa
ti
e
n
ts
w
ith
HBs
Ag
c
le
a
ra
n
c
e
(%
)
230 patients with HBeAg-negative CHB treated with PEGASYS ± lamivudine
(9% * )
(16% * )
*
Genotype C症例のS抗原陰性化率
日本での検討
HBe 抗原陽性患者を対象とし, 天然型IFNα(HLBI)に対す
PEG-IFNα-2a 180μg/w,48W PEG-IFNα-2a 90μg/w,48W 経過観察 24W 24W 48W +24W 0W PEG-IFNα-2a 180μg/w,24W PEG-IFNα-2a 90μg/w,24W HLBI 6MIU 3/w,24W