Lower-than-standard dose peg-IFN alfa-2a for chronic hepatitis C caused by genotype 2 and 3 is sufficient when given in combination with weight-based ribavirin.
Mono-therapy with pegylated interferon (peg-IFN) has shown that a lower-than-standard dose yields the same sustained viral response (SVR) rates as standard doses for chronic hepatitis C virus (HCV) infection caused by genotypes 2 or 3. Our aim was to see if a fixed, lower-than-standard dose of peg-IFN alfa-2a (135 microg weekly) in combination with ribavirin 11 mg/kg daily for 24 weeks yields sufficient SVR rates for genotypes 2 or 3. Hundred consecutive patients with a mean age of 44 years (range 20-69 years), 59 with genotype 3 and 41 with genotype 2, were studied. Rapid viral response (RVR) with HCV-RNA <15 IU/mL at treatment week 4 and SVR were calculated. RVR was achieved by 28/40 (70%) patients with genotype 2 and 41/58 (71%) with genotype 3. Significantly more genotype 2 patients with RVR achieved SVR 27/28 (96%) than genotype 2 patients who failed to achieve RVR, 8/12 (66%), P = 0.009. The corresponding figures for genotype 3 patients were 39/41 (95%) vs 11/17 (65%), respectively, P = 0.002. In total, SVR was achieved by 35/41 (85%) patients with genotype 2 and 51/59 (86%) patients with genotype 3, respectively. We found that 135 microg peg-IFN alfa-2a weekly was sufficient for treatment of genotype 2 and 3 chronic hepatitis C when combined with RBV dosed daily according to body weight. This combination yielded high SVR rates (85-86%) and may be cost-saving.
Division of Infectious Diseases, Department of Medicine, Karolinska University Hospital Huddinge, Stockholm, Sweden. ola.weiland@ki.se
O
O
Weiland
A
A
Hollander
L
L
Mattsson
H
H
Glaumann
K
K
Lindahl
R
R
Schvarcz
G
G
Lindh
R
R
Enquist
A
A
Quist
D000328:Adult; D000368:Aged; D000998:Antiviral Agents / Q000008:administration & dosage*; D004359:Drug Therapy, Combination; D005260:Female; D005838:Genotype; D006526:Hepatitis C / Q000145:classification* / Q000235:genetics; D019698:Hepatitis C, Chronic / Q000188:drug therapy* / Q000821:virology*; D006801:Humans; D000077190:Interferon alpha-2; D016898:Interferon-alpha / Q000008:administration & dosage* / Q000009:adverse effects; D008297:Male; D008875:Middle Aged; D011092:Polyethylene Glycols / Q000008:administration & dosage* / Q000009:adverse effects; D012367:RNA, Viral / Q000097:blood; D011994:Recombinant Proteins; D012254:Ribavirin / Q000008:administration & dosage* / Q000009:adverse effects; D016896:Treatment Outcome; D019562:Viral Load
D000998:Antiviral Agents; D000077190:Interferon alpha-2; D016898:Interferon-alpha; D012367:RNA, Viral; D011994:Recombinant Proteins; D011092:Polyethylene Glycols; D012254:Ribavirin; C100416:peginterferon alfa-2a