Jo-Ann Ford, RN, MSN Jo-Ann Ford, RN, MSN Associate Director Associate Director BC Hepatitis Program BC Hepatitis Program Diamond Centre, VGH Diamond Centre, VGH Advances in HCV Treatment - Advances in HCV Treatment - Where Where Are we Going? Are we Going?
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Jo-Ann Ford, RN, MSN Associate Director BC Hepatitis Program Diamond Centre, VGH Advances in HCV Treatment - Where Are we Going? Where Are we Going?
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Jo-Ann Ford, RN, MSNJo-Ann Ford, RN, MSNAssociate DirectorAssociate DirectorBC Hepatitis ProgramBC Hepatitis ProgramDiamond Centre, VGHDiamond Centre, VGH
Advances in HCV Treatment -Advances in HCV Treatment - Where Are we Going?Where Are we Going?
Disclosures – J. FordDisclosures – J. Ford
• Clinical Trials:
– Hoffmann LaRoche, Merck Canada, Vertex Inc., Pfizer Canada, Johnson & Johnson, Gilead Sciences, Human Genome Sciences, Boehringer Ingelheim
• Advisory Boards:
– Merck Canada, Hoffmann LaRoche, Gilead Sciences, Vertex Inc.
IntroductionIntroduction
• Prevalence HCV in Canada: 1-2%
• BC: Estimated 60,000 – 100,000 chronic carriers
• HCV in Canada
– Yesterday: recipients of blood transfusions
– Today: horizontal transmission (IVDU)
U.S.A. 4 M
SOUTH
AMERICA
10 M
AFRICA 32 M
EAST MEDITERRANEAN
20M
SOUTH EAST ASIA30 M
AUSTRALIA0.2 M
SOURCE, WHO
WEST EUROPE
9 M
FAR EAST ASIA60 M
170 Million Carriers Worldwide
3% of World Population
HCV: A Global Health Problem
CANADA 300,000
Hepatitis C Disease Progression
Acute Infection Chronic Infection Cirrhosis Death
5% of chronic HCV-infected cirrhotic individuals per year
Liver Failure (Decompensation)
10-20% of chronic HCV-infected individuals
• 80% of infected patients progress to chronic disease
• acute infection often silent
Approx 20% of patients decompensate within 5 years of developing cirrhosis
Liver Cancer (HCC)
Chronic HCV is the leading cause of liver transplantation in the US and Canada
Liver Transplantation
Goals of TreatmentGoals of Treatment
• Cure HCV infection
• Suppress disease activity
• Halt or reverse fibrosis progression
• Reduce risk of hepatocellular carcinoma
• Control extrahepatic consequences of HCV infection
Increasing proportion of liver transplantations due to HCV
0100 02
6.56.5
4646
%
Year
UNOSUNOS
% o
f liv
er tr
ansp
lant
due
to H
epat
itis
C%
of l
iver
tran
spla
nt d
ue to
Hep
atiti
s C
90 91 92 93 94 95 96 97 98 990
10
20
30
40
50
60
Source: UNOSSource: UNOS
Current HCV Therapy: 2010Genotype 1 in need of better therapies
2%9%
17%
29%
38-41%
0%
20%
40%
60%
80%
Sus
tain
ed R
espo
nse
IFN 24w IFN 48w IFN-R 24w IFN-R 48w PEG-R
HCV hepatitis C virus; IFN interferon
Late 1980’s 2010
IDEALPeginterferon Alfa-2b
or Alfa-2a with Ribavirin forTreatment of Hepatitis C Infection
McHutchison J et al.
N Engl J Med 2009; 361:580-93.
Study Schema and Treatment Regimens
N = 1019 PEG-IFN alfa-2b 1.5 μg/kg/wk
+ RBV 800-1400 mg/d× 48 weeks
N = 1019 PEG-IFN alfa-2b 1.5 μg/kg/wk
+ RBV 800-1400 mg/d× 48 weeks
N = 1035PEG-IFN alfa-2a 180 μg/wk
+ RBV 1000-1200 mg/d× 48 weeks
N = 1035PEG-IFN alfa-2a 180 μg/wk
+ RBV 1000-1200 mg/d× 48 weeks
N = 1016 PEG-IFN alfa-2b 1.0 μg/kg/wk
+ RBV 800-1400 mg/d× 48 weeks
N = 1016 PEG-IFN alfa-2b 1.0 μg/kg/wk
+ RBV 800-1400 mg/d× 48 weeks
ScreeningScreening
Follow-up24 weeksFollow-up24 weeks
Follow-up24 weeksFollow-up24 weeks
Follow-up24 weeksFollow-up24 weeks
2 4 12 24 48 4 12 24
Stratified by baseline viral load (> or ≤ 600,000 IU/mL) and race (African American)Stratified by baseline viral load (> or ≤ 600,000 IU/mL) and race (African American) Standard response stop criteria applied at weeks 12 (no EVR) and 24 (HCV RNA-positive) Standard response stop criteria applied at weeks 12 (no EVR) and 24 (HCV RNA-positive)
Randomization (1:1:1, stratified by G1 subtype and BL VL)
Study Weeks 480 72
CH
C,
G1,
naï
ve,
n=
1097
(in
cl.
159
AA
) PegIntron® 1.5 µg/kg/wk plus RBV 600-1400 mg/d plus placebo (starting at study week 5)
PegIntron® 1.5 µg plus RBV 600-1400 mg/d plus
boceprevir 800 mg tid
PegIntron® 1.5 µg plus RBV 600-1400 mg plus boceprevir 800 mg tid
284
* Pts in the 28-wk-arm who are HCV RNA undetectable at week 4 of boceprevir tx (=study week 8) and all subsequent assays will stop tx at wk 28Pts who are not undetectable will stop boceprevir at week 28 and will continue with PegIntron® plus RBV alone for an additional 20 weeks
PegIntron plus RBV
PegIntron plus RBV
8 *
24 wks Follow-up
24 wks Follow-up
PegIntron® plus RBV plus placebo
44 wks Follow-up
Poordad et al, AASLD 2010, oral (LB-4), Bronowicki et al, AASLD 2010, poster (LB-15)
SPRINT-2 – SVR (ITT)
* *
* p<0.0001Per protocol, if a pt did not have a 24-week post-tx assessment, the patient’s 12-week post-tx assessment was utilizedPress release, August 4, 2010
SPRINT-2: SVR Rates in Patients Who Qualified For 28 Weeks of Therapy
44% of patients qualified for 28 weeks of therapy (assessment at Week 4 of BOC, ie Week 8 of therapy) in response-guided arm
Stage of fibrosis or cirrhosis, n (%) Bridging Fibrosis Cirrhosis
52 (14)21 (6)
59 (16)26 (7)
52 (14)21 (6)
†Race and ethnicity were self-reported *Roche Taqman® v2 LLOQ of 25 IU/mL**5’NC InnoLipa assay Presented at AASLD – November 2, 2010Presented at AASLD – November 2, 2010
SVR rates in Telaprevir-Treated Patients Compared to Peginterferon/Ribavirin Alone
34Adapted from Shiffman ML. Curr Gastroenterol Rep 2006;8:46–52
2 log10 drop
HCV RESPOND-2 Final Results High Sustained Virologic Response Among Genotype 1
Previous Non-Responders and Relapsers to Peginterferon/Ribavirin when Re-Treated with Boceprevir
Plus PEGINTRON (Peginterferon alfa-2b)/Ribavirin
Bruce R. Bacon, Stuart C. Gordon, Eric Lawitz, Patrick Marcellin, John M. Vierling, Stefan Zeuzem, Fred Poordad, Navdeep Boparai, Margaret Burroughs, Clifford A. Brass,
Janice K. Albrecht, and Rafael Esteban
For the RESPOND-2 Investigators
RESPOND-2: Study ObjectivesRESPOND-2: Study Objectives
• Compare safety/efficacy of two treatment strategies with boceprevir added to peginterferon/ribavirin (PR) versus PR alone in genotype 1 patients who failed treatment with PR
• Evaluate safety/efficacy independently in two patient populations, history PR non-responders (decrease of HCV-RNA ≥2-log by week 12 of prior therapy but with detectable HCV-RNA throughout the course of therapy) and relapsers
• Explore response-guided therapy (RGT) vs. 44 weeks of therapy with boceprevir regimen (BOC/PR48)
Week 4
Week 48
PR + Placebo Follow-up
PRlead-in
PR + Boceprevir
PRlead-in
Week 36 Week 72
TW 8 HCV-RNA Undetectable
TW 8 HCV-RNA Detectable/
TW 12 Undetectable
PR + placebo Follow-up
Follow-up
Study Arms and Dosing Regimen
Control48 P/R N = 80
BOCRGT
N = 162
Peginterferon (P) administered subcutaneously at 1.5 μg/kg once weekly, plus Ribavirin (R) using weight based dosing of 600-1400 mg/day in a divided daily doseBoceprevir dose of 800 mg thrice daily
PR + BoceprevirPRlead-in
Follow-upBOC/PR48
N = 161
HCV-RNA measured by the Cobas TaqMan assay (Roche). Patients with detectable HCV-RNA (LLD=9.3 IU/mL) at week 12 were considered treatment failures.
Week 12 futility
RESPOND-2: SVR Rates According to Treatment Arm and Prior Response
0
20
40
60
80
100
Overall
SV
R (
%)[1
]
4-wk PR + 44-wk BOC + PR (n = 161)
59*
PriorNonresponders
PriorRelapsers
48-wk PR (n = 80)
4-wk PR + response-guided BOC + PR (n = 162)
67
21
40
52
7
75
29
69
P < .0001 vs control
(both arms)
1. Bacon BR, et al. AASLD 2010. Abstract 216. These data are available in unpresented abstract format only and will be presented in full during the AASLD meeting. We encourage you to review the presented data before making conclusions.2. These data are available in press release format only, have not been peer reviewed, may be incomplete, and we await presentation or publication in a peer-reviewed format before conclusions should be made from these data.
*46% of patients inresponse-guided arm eligible for shorter duration of therapy, with 86% SVR rate.[2]
Telaprevir-based Therapy in Genotype 1 Hepatitis C Virus-infected Patients with
Prior Null Response, Partial Response or Relapse to Peginterferon/Ribavirin:
REALIZE Trial Final ResultsGraham R Foster,1 Stefan Zeuzem,2 Pietro Andreone,3 Stanislas Pol,4 Eric Lawitz,5 Moises Diago,6 Stuart Roberts,7 Roberto Focaccia,8 Zobair Younossi,9 Andrzej Horban,10 Rolf Van Heeswijk,11 Sandra De Meyer,11 Don Luo,12 Gaston Picchio,12 Maria Beumont11
1Queen Mary University of London, Institute of Cell and Molecular Science, London, UK; 2Johann Wolfgang Goethe University Medical Center, Frankfurt am Main, Germany; 3Università di Bologna, Bologna, Italy; 4Université Paris Descartes, INSERM Unité 567, and Assistance Publique–Hôpitaux de Paris, Cochin Hospital Paris, France; 5Alamo Medical Research, San Antonio, TX, USA; 6Hospital General de Valencia, Valencia, Spain; 7Department of Gastroenterology, Alfred Hospital, Melbourne, Australia; 8Emilio Ribas Infectious Diseases Institute, São Paulo, Brazil; 9Center for Liver Disease, Inova Fairfax Hospital, Falls Church, VA,USA; 10Medical University of Warsaw, Wolska, Warsaw, Poland; 11Tibotec BVBA, Beerse, Belgium; 12Tibotec Inc., Titusville, NJ, USA
44Presented at APASL, 18 February 2011 Presented at APASL, 18 February 2011
REALIZE: Study ObjectivesREALIZE: Study Objectives
• International, randomized, double-blind, multicentre, placebo-controlled Phase III trial
• Primary objective:– To evaluate superior efficacy (proportion of patients
achieving an SVR) of TVR-based therapy compared with standard treatment in patients within the prior relapser and prior-non-responder (partials/nulls) group
• Key secondary objectives:– Evaluation of effect of Peg-OFN/RBV lead-in on
efficacy of TVR-based treatment– Assessment of safety and tolerability of TVR-based
treatment
REALIZE Study Design (N=662)*
484 160 128Weeks
72
T12/PR48Peg-IFN + RBV
TVR + Peg-IFN + RBV
Pbo + Peg-IFN + RBV n=266 Follow-up
SVR assessment
TVR+ Peg-IFN + RBV
Peg-IFN + RBVT12(DS)/
PR48
n=264Follow-up
Pbo + Peg-IFN + RBV
*Randomization stratified by viral load and prior response; stopping rules applied for TVR (Weeks 4, 6, and 8) and Peg-IFN/RBV (Weeks 12, 24, and 36)
Presented at APASL, 18 February 2011 Presented at APASL, 18 February 2011
47
REALIZE: Baseline Characteristics
*Determined using the COBAS TaqMan HCV assay version 2.0; ‡Determined by NS3 sequencing; §Defined by local pathologists
Presented at APASL, 18 February 2011 Presented at APASL, 18 February 2011
REALIZE: SVR in Prior Relapsers, Partial Responders and Null Responders
SV
R (
%)
Prior relapsers
Prior partial responders
Pbo/PR48
4/27
T12/PR48
29/49
T12(DS)/PR48
26/48n/N=
Pbo/PR48
2/37
T12/PR48
21/72
T12(DS)/PR48
25/75
Pbo/PR48
16/68
T12/PR48
121/145
T12(DS)/PR48
124/141
Prior null responders
48*p<0.001 vs Pbo/PR48
**
**
**
Presented at APASL, 18 February 2011 Presented at APASL, 18 February 2011
T12/PR48 (n=266)
T12(DS)/PR48
(n=264)Pbo/PR48
(n=132)Discontinuation of All Study Drugs during TVR Treatment Phase, n (%)
Any AE
Rash events
Anemia events
Pruritus
17 (6)
2 (1)
2 (1)
0
11 (4)
2 (1)
2 (1)
1 (<1)
4 (3)
0
0
0
Discontinuation of TVR during TVR Treatment Phase, n (%)
Any AE
Rash events
Anemia events
Pruritus
39 (15)
12 (5)
6 (2)
1 (<1)
29 (11)
10 (4)
9 (3)
3 (1)
4 (3)
0
0
0
49
AEs Leading to Study Drug Discontinuations
AE = adverse event
Presented at APASL, 18 February 2011 Presented at APASL, 18 February 2011
REALIZE: ConclusionsREALIZE: Conclusions
• TVR/Peg-IFN/RBV was superior to Peg-IFN/RBV in treatment experienced populations including null responders, partial responders and relapsers
• A lead-in strategy using TVR-based regimen did not improve SVR rates or reduce on-treatment virologic failure and relapse rates
• Safety data were comparable to previous TVR studies. Adverse events leading to permanent discontinuation (anemia and rash) were more frequent in the pooled telaprevir group then in the control group
Presented at APASL 18 Feb 2011Presented at APASL 18 Feb 2011
CONCLUSIONS
• The future is very bright, with greater opportunity for CURE