ABSTRACT
As of October 2006, 6 medications are approved in the United States for the management
of chronic hepatitis B virus (HBV) infection: 2 formulations of interferon and 4 oral
nucleos(t)ide analogues. For the treating practitioner, tailoring the pharmaceutical
regimen according to patient features and clinical circumstances can be a challenge.
First-line therapeutic regimens for the management of HBV infection include monotherapy
with a U.S. Food and Drug Administration-approved agent that has potent on-treatment
viral response and low rates of resistance; in the future, these regimens may include
a combination of more than one nucleos(t)ide analogue or a combination of a nucleos(t)ide
analogue and pegylated interferon. The oral nucleos(t)ide analogues are generally
better tolerated than interferon; however, they can be expensive when administered
for lengthy periods and can also lead to medication resistance. Lamivudine, the first
approved nucleoside analogue for the treatment of HBV infection, has a very high resistance
profile; in fact, lamivudine exposure increases viral resistance to other commercially
available nucleos(t)ide analogues: entecavir, telbivudine, and adefovir. For these
reasons, the 2007 American Association for the Study of Liver Diseases (AASLD) guidelines
no longer recommend lamivudine as first-line therapy for the management of HBV infection.
A satellite symposium conducted during the 57th Annual Meeting of the AASLD in Boston,
Massachusetts, presented approaches to customizing the management of chronic HBV infection.
The presentation highlighted recent findings suggesting that early, profound, and
sustained viral suppression improves the probability of sustained virologic response
and reduces the likelihood of nucleos(t)ide resistance.
KEYWORDS
Hepatitis B - antiviral therapy - nucleoside and nucleotide inhibitors - interferon
- antiviral resistance - HBV DNA
REFERENCES
- 1 World Heath Organization .Hepatitis B 2000. Available at: http://www.who.int/mediacentre/factsheets/fs204/en Accessed June 6, 2006
- 2
Beasley R P.
Hepatitis B virus: the major etiology of hepatocellular carcinoma.
Cancer.
1988;
61
1942-1956
- 3
Cooksley W G, Piratvisuth T, Lee S D et al..
Peginterferon alpha-2a (40 kDa): an advance in the treatment of hepatitis B e antigen-positive
chronic hepatitis B.
J Viral Hepat.
2003;
10
298-305
- 4
Kuo A, Dienstag J L, Chung R T.
Tenofovir disoproxil fumarate for the treatment of lamivudine-resistant hepatitis
B.
Clin Gastroenterol Hepatol.
2004;
2
266-272
- 5
van Bommel F, Wunsche T, Mauss S et al..
Comparison of adefovir and tenofovir in the treatment of lamivudine-resistant hepatitis
B virus infection.
Hepatology.
2004;
40
1421-1425
- 6
Gish R G, Trinh H, Leung N et al..
Safety and antiviral activity of emtricitabine (FTC) for the treatment of chronic
hepatitis B infection: a two-year study.
J Hepatol.
2005;
43
60-66
- 7
Lok A S, McMahon B J. Practice Guidelines Committee, American Association for the
Study of Liver Diseases (AASLD) .
Chronic hepatitis B.
Hepatology.
2007;
45
507-539
- 8
Keeffe E B, Dieterich D T, Han S H et al..
A treatment algorithm for the management of chronic hepatitis B virus infection in
the United States: an update.
Clin Gastroenterol Hepatol.
2006;
4
936-962
- 9 Tyzeka [prescribing information]. Cambridge, MA; Idenix Pharmaceuticals Incorporated,
and East Hanover, NJ: Novartis Pharmaceuticals Corporation 2006
- 10
Lai C L, Leung N, Teo E K et al..
A 1-year trial of telbivudine, lamivudine, and the combination in patients with hepatitis
B e antigen-positive chronic hepatitis B.
Gastroenterology.
2005;
129
528-536
- 11 Wilber R, Brett-Smith H, Zhu J and the Entecavir Viral Kinetics Group 1 et al.
Entecavir (ETV) vs. adefovir (ADV): HBV DNA reduction in chronically infected HBeAg(
+ ) nucleoside-naive adults in a 12-week viral kinetics study. Presented at: NIH Management
of Hepatitis B Conference April 6-8, 2006 Bethesda, MD. Poster 014
- 12 Chan HL-Y, Lai C-L, Cho M et al.. A randomized trial of telbivudine (LdT) vs. adefovir
for HBeAg-positive chronic hepatitis B: results of the primary week 24 analysis. Presented
at: 41st Meeting of the European Association for the Study of the Liver April 26-30,
2006 Vienna, Austria;
- 13
Nafa S, Ahmed S, Tavan D et al..
Early detection of viral resistance by determination of hepatitis B virus polymerase
mutations in patients treated by lamivudine for chronic hepatitis B.
Hepatology.
2000;
32
1078-1088
- 14
Balzarini J, Wedgwood O, Kruining J et al..
Anti-HIV and anti-HBV activity and resistance profile of 2′,3′-dideoxy-3′-thiacytidine
(3TC) and its arylphosphoramidate derivative CF 1109.
Biochem Biophys Res Commun.
1996;
225
363-369
- 15
Leung N W, Lai C L, Chang T T et al..
Extended lamivudine treatment in patients with chronic hepatitis B enhances hepatitis
B e antigen seroconversion rates: results after 3 years of therapy.
Hepatology.
2001;
33
1527-1532
- 16
Guan R, Lai C L, Liaw Y F et al..
Efficacy and safety of 5 years lamivudine treatment of Chinese patients with chronic
hepatitis B.
J Gastroenterol Hepatol.
2001;
16(suppl 1)
A60
- 17
Lai C L, Dienstag J, Schiff E et al..
Prevalence and clinical correlates of YMDD variants during lamivudine therapy for
patients with chronic hepatitis B.
Clin Infect Dis.
2003;
36
687-696
- 18
Liaw Y F.
The current management of HBV drug resistance.
J Clin Virol.
2005;
34(suppl 1)
S143-S146
- 19
Hadziyannis S J, Papatheodoridis G V, Dimou E et al..
Efficacy of long-term lamivudine monotherapy in patients with hepatitis B e antigen-negative
chronic hepatitis B.
Hepatology.
2000;
32
847-851
- 20
Liaw Y F.
Management of YMDD mutations during lamivudine therapy in patients with chronic hepatitis
B.
J Gastroenterol Hepatol.
2002;
17(suppl 3)
S333-S337
- 21
Lo C M, Liu C L, Chan S C et al..
Failure of hepatitis B vaccination in patients receiving lamivudine prophylaxis after
liver transplantation for chronic hepatitis B.
J Hepatol.
2005;
43
283-287
- 22
Torresi J, Earnest-Silveira L, Deliyannis G et al..
Reduced antigenicity of the hepatitis B virus HBsAg protein arising as a consequence
of sequence changes in the overlapping polymerase gene that are selected by lamivudine
therapy.
Virology.
2002;
293
305-313
- 23
Hadziyannis S J, Tassopoulos N C, Heathcote E J et al..
Long-term therapy with adefovir dipivoxil for HBeAg-negative chronic hepatitis B for
up to 5 years.
Gastroenterology.
2006;
131
1743-1751
- 24 Hepsera [prescribing information]. Foster City, CA; Gilead Sciences Inc 2006
- 25
Colonno R, Rose R, Levine S et al..
Entecavir two year resistance update: no resistance observed in nucleoside naïve patients
and low frequency resistance emergence in lamivudine refractory patients.
Hepatology.
2005;
42(suppl 1)
573A
Abstract 962
- 26 Borroto-Esoda K, Arterburn S, Snow A et al.. Final analysis of virological outcomes
and resistance during 5 years of adefovir dipivoxil monotherapy in HBeAg-negative
patients. Presented at: Digestive Disease Week May 21-24, 2006 Los Angeles, CA;
- 27 Colonno R, Rose R, Pokornowski K et al.. Four year assessment of entecavir resistance
in nucleoside naive and lamivudine refractory patients. Presented at: 42nd Annual
Meeting of the European Association for the Study of Liver Disease April 11-15, 2007
Barcelona, Spain;
- 28
Colonno R J, Rose R, Baldick C J et al..
Entecavir resistance is rare in nucleoside naive patients with hepatitis B.
Hepatology.
2006;
44
1656-1665
- 29 DiBisceglie A, Lai C, Gane E et al.. Telbivudine GLOBE Trial: maximal early HBV
suppression is predictive of optimal two-year efficacy in nucleoside-treated hepatitis
B patients. Presented at: 57th Annual Meeting of the American Association for the
Study of Liver Diseases October 27-31, 2006 Boston, MA; Abstract 112
- 30 Lai C L, Gane E, Hsu C-W et al.. Two-year results from the GLOBE Trial in patients
with hepatitis B: greater clinical and antiviral efficacy for telbivudine (LdT) vs
lamivudine. Presented at: 57th Annual Meeting of the American Association for the
Study of Liver Diseases October 27-31, 2006 Boston, MA; Abstract 91
- 31
Flink H J, Sprengers D, Hansen B E et al..
Flares in chronic hepatitis B patients induced by the host or the virus? Relation
to treatment response during Peg-interferon α-2b therapy.
Gut.
2005;
54
1604-1609
- 32
Perrillo R P.
Therapy of hepatitis B: viral suppression or eradication?.
Hepatology.
2006;
43(suppl 1)
S182-S193
- 33
Cooksley G, Manns M, Lau G K et al..
Effect of genotype and other baseline factors on response to PEGInterferon α-2a (40kDa)
(Pegasys®) in HBeAg-positive chronic hepatitis B: results from a large, randomized study.
J Hepatol.
2005;
42(suppl 2)
30-31
Abstract 71
- 34
Flink H J, van Zonneveld M, Hansen B E et al..
Treatment with Peg-interferon alpha-2b for HBeAg-positive chronic hepatitis B: HBsAg
loss is associated with HBV genotype.
Am J Gastroenterol.
2006;
101
297-303
- 35
Peters M G, Andersen J, Lynch P et al..
Randomized controlled study of tenofovir and adefovir in chronic hepatitis B virus
and HIV infection: ACTG A5127.
Hepatology.
2006;
44
1110-1116
- 36
van Bommel F, Zollner B, Sarrazin C et al..
Tenofovir for patients with lamivudine-resistant hepatitis B virus (HBV) infection
and high HBV DNA level during adefovir therapy.
Hepatology.
2006;
44
318-325
- 37
Lim S G, Ng T M, Kung N et al..
A double-blind placebo-controlled study of emtricitabine in chronic hepatitis B.
Arch Intern Med.
2006;
166
49-56
- 38
Villeneuve J P, Durantel D, Durantel S et al..
Selection of a hepatitis B virus strain resistant to adefovir in a liver transplantation
patient.
J Hepatol.
2003;
39
1085-1089
- 39
Yang H, Westland C, Delaney IV W et al..
Complete genotypic and phenotypic analyses of HBV mutations identified in HBeAg-negative
chronic hepatitis B patients receiving 96 weeks of adefovir dipivoxil (ADV).
Hepatology.
2003;
38(suppl 1)
705A
Abstract 1141
- 40 Standring D N, Seifer M, Patty A et al.. HBV resistance determination from the
telbivudine GLOBE registration trial. Presented at: 41st Meeting of the European Association
for the Study of Liver Diseases April 26-30, 2006 Vienna, Austria. Poster 514
- 41
Peters M G, Hann Hw H, Martin P et al..
Adefovir dipivoxil alone or in combination with lamivudine in patients with lamivudine-resistant
chronic hepatitis B.
Gastroenterology.
2004;
126
91-101
- 42
Perrillo R, Hann H W, Mutimer D et al..
Adefovir dipivoxil added to ongoing lamivudine in chronic hepatitis B with YMDD mutant
hepatitis B virus.
Gastroenterology.
2004;
126
81-90
- 43
Janssen H L, van Zonneveld M, Senturk H et al..
Pegylated interferon alfa-2b alone or in combination with lamivudine for HBeAg-positive
chronic hepatitis B: a randomised trial.
Lancet.
2005;
365
123-129
- 44
Marcellin P, Lau G K, Bonino F et al..
Peginterferon alfa-2a alone, lamivudine alone, and the two in combination in patients
with HBeAg-negative chronic hepatitis B.
N Engl J Med.
2004;
351
1206-1217
- 45
Lau G K, Piratvisuth T, Luo K X et al..
Peginterferon alfa-2a, lamivudine, and the combination for HBeAg-positive chronic
hepatitis B.
N Engl J Med.
2005;
352
2682-2695
- 46
Yang H, Qi X, Sabogal A et al..
Cross-resistance testing of next-generation nucleoside and nucleotide analogues against
lamivudine-resistant HBV.
Antivir Ther.
2005;
10
625-633
- 47
Tenney D J, Levine S M, Rose R E et al..
Clinical emergence of entecavir-resistant hepatitis B virus requires additional substitutions
in virus already resistant to lamivudine.
Antimicrob Agents Chemother.
2004;
48
3498-3507
- 48
Sherman M, Yurdaydin C, Sollano J et al..
Entecavir for treatment of lamivudine-refractory, HBeAg-positive chronic hepatitis
B.
Gastroenterology.
2006;
130
2039-2049
- 49
Van Bommel F, Mauss S, Zollner B et al..
Long-term effect of tenofovir in the treatment of lamivudine-resistant hepatitis B
virus infections in comparison to adefovir.
Hepatology.
2005;
42
269A
Abstract 184
- 50
Lampertico P, Vigano M, Iavarone M et al..
Low rates of genotypic resistance to adefovir in lamivudine resistant patients treated
with adefovir-lamivudine combination therapy for 3 years.
Hepatology.
2006;
44(suppl 1)
556A
Abstract 989
- 51
Lampertico P, Marzano A, Levrero M et al..
Adefovir and lamivudine combination therapy is superior to adefovir monotherapy for
lamivudine-resistant patients with HBeAg-negative chronic hepatitis B.
Hepatology.
2006;
44(suppl 1)
693A
Abstract LB5
- 52
Liaw Y F, Sung J J, Chow W C et al..
Lamivudine for patients with chronic hepatitis B and advanced liver disease.
N Engl J Med.
2004;
351
1521-1531
- 53
Fung S K, Andreone P, Han S H et al..
Adefovir-resistant hepatitis B can be associated with viral rebound and hepatic decompensation.
J Hepatol.
2005;
43
937-943
- 54
Dienstag J L, Schiff E R, Wright T L et al..
Lamivudine as initial treatment for chronic hepatitis B in the United States.
N Engl J Med.
1999;
341
1256-1263
- 55
Zoulim F, Poynard T, Degos F et al..
A prospective study of the evolution of lamivudine resistance mutations in patients
with chronic hepatitis B treated with lamivudine.
J Viral Hepat.
2006;
13
278-288
- 56
Yuen M F, Sablon E, Hui C K et al..
Factors associated with hepatitis B virus DNA breakthrough in patients receiving prolonged
lamivudine therapy.
Hepatology.
2001;
34
785-791
- 57
Heo J, Cho M, Cho M B et al..
Predictors of lamivudine resistance in patients with chronic hepatitis B infection.
Korean J Hepatol.
2007;
13
157-165
Robert G GishM.D.
California Pacific Medical Center
2340 Clay Street, Third Floor, San Francisco, CA 94115