Download - RUOLO DELLA TERAPIA ANTIANGIOGENICA NEL CARCINOMA MAMMARIO Rilevanza delle Evidenze Scientifiche
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RUOLO DELLA TERAPIA ANTIANGIOGENICA NEL CARCINOMA MAMMARIO
Rilevanza delle Evidenze Scientifiche
P PronzatoModena, 18.11.2011
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(Anti-) Angiogenesis
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HER2- Metastatic Breast Cancer(CT Needed)
Decision Making Problems
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F Cardoso & J Cortes
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F Cardoso & J Cortes
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F Cardoso & J Cortes
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F Cardoso & J Cortes
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MBC: main drivers in 2010s
• Clinico Pathological Factors– HER2 /HR– Previous Treatment– Burden of Disease
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MBC: main drivers in 2010s
• Goals– Prolongation of Survival– Quality of Life– Symptom Relief– Response– Delay of Progression
• Clinico Pathological Factors– HER2 /HR– Previous Treatment– Burden of Disease
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MBC
HER2 HER2-
HER2+ HR+ HR-
After HT CHEMOTHERAPY
Previous anthra-taxanes CT
Evidence Based Decision MakingHER2- / MBC
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MBC
HER2 HER2-
HER2+ HR+ HR-
After HT CHEMOTHERAPY
Previous anthra-taxanes CT
Evidence Based Decision MakingHER2- / MBC
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MN Dickler, ASCO 2011
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RCTs and Meta-Analysis
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Survival Analyses
Miller K et al. N Engl J Med 2007;357:2666-2676
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Hazard Ratios for Disease Progression
Miller K et al. N Engl J Med 2007;357:2666-2676
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Hazard Ratios for Disease Progression
Miller K et al. N Engl J Med 2007;357:2666-2676
Soon this regimen became widely adopted by clinicians who treated thousands of patients and felt confortable with using the drug
AM Gonzalez-Angulo, Nat Rev Clin Oncol 2011
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Trial Design
• Capecitabine (1000 mg/m2 bid d1–14)
• Taxane (docetaxel 75–100 mg/m2 or nab-paclitaxel 260 mg/m2)
• Anthracycline-based chemotherapy • AC (doxorubicin 50–60 mg/m2, cyclophosphamide 500–600 mg/m2)
• EC (epirubicin 90–100 mg/m2, cyclophosphamide 500–600 mg/m2)
• FAC (5-FU 500 mg/m2, doxorubicin 50 mg/m2, cyclophosphamide 500 mg/m2)
• FEC (5-FU 500 mg/m2, epirubicin 90–100 mg/m2, cyclophosphamide 500 mg/m2)
• Bevacizumab or placebo (15 mg/kg)
Investigator’s choice of
chemotherapy
Capecitabine or taxane/
anthracycline
Previously untreated MBC
(n=1237)
Stratification factors:
•Disease-free interval
•Previous adjuvantchemotherapy
•No. of metastatic sites
•Capecitabine, taxane or anthracycline
Optional2nd-line
chemotherapy+
bevacizumab
Treat untilPD
RA
ND
OM
IZE
2:1
Robert et al. ASCO 2009
Chemotherapy +bevacizumab
q3w
Chemotherapy +placebo
q3w
NJ Robert, JCO 2011
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1.0
0.8
0.6
0.4
0.2
0
IRC assessment
Median, months 9.8 6.2
HR (95% CI)* 0.68 (0.54–0.86)
p=0.0011
Investigator assessment
Median, months 8.6 5.7
HR (95% CI)* 0.69 (0.56–0.84)
p=0.0002
PFS: Capecitabine Cohort
BV(n=409)
PL(n=206)
PF
S e
stim
ate
0 6 12 18 2430 Months
5.7 8.6
*Stratified analysis Robert et al. ASCO 2009NJ Robert, JCO 2011
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Objective Response Rate*: Capecitabine Cohort
Patients, %
p=0.0097
*Patients with measurable disease at baseline
23.6
35.4
Complete response
Partial response
Robert et al. ASCO 2009NJ Robert, JCO 2011NJ Robert, JCO 2011
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A Meta-Analysis of Overall Survival Data from Three Trials of Bevacizumab and First-Line
Chemotherapy as Treatment for Patients with Metastatic Breast Cancer
Baylor-Sammons Cancer Center, Texas Oncology, US Oncology, Dallas, TX; Mount Vernon Cancer Centre, London, England; Dana-Farber Cancer Institute, Boston, MA; Institut Curie, Paris, France; Mayo Clinic, Jacksonville, Florida; Michiana Hematology Oncology, South Bend, IN; Vall d'Hebron University Hospital, Barcelona, Spain; BioOncology, Genentech, S San Francisco, CA;
Indiana University Melvin and Bren Simon Cancer Center, Indianapolis, IN
Joyce O’Shaughnessy, David Miles, Robert Gray, Véronique Diéras, Edith A. Perez, Robin Zon, Javier Cortés,
Xian Zhou, See-Chun Phan, Kathy Miller
ASCO, 2010
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General Study Designs
OptionalSecond-
line Chemo +
BV(AVADO and
RIBBON-1 only)
Chemo +No BV
Chemo +BV
Treat untilPD
RA
ND
OM
IZE
Previously Untreated
MBC
RIBBON-1Capecitabine,
Taxane,or
Anthracycline
AVADODocetaxel
E2100Paclitaxel
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BV=bevacizumab, PL=placebo, PFS=progression-free survival, ORR=objective response rate, OS=overall survival.* Permitted continuing on BV or crossing over to BV.† Analyses based on IRF assessments.
Comparison of the Studies
E2100 AVADO* RIBBON-1*
No. of patients 722 488 1237
Geography US (90%) Ex-US US (50%)
Randomization ratio (BV:PL)
1:1 1:1 2:1
ChemotherapyPaclitaxel
weeklyDocetaxel
Capecitabine,Docetaxel/nab-Paclitaxel,
Doxorubicin/Epirubicin
Primary Endpoint PFS† PFS PFS
Key Secondary Endpoints
OS, ORROS, ORR,
1-yr survivalOS, ORR,
1-yr survival
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Overview of Efficacy Results from the Individual Studies in the Pooled Analysis
E2100 AVADORIBBON-1
(Cape)RIBBON-1
(Tax/Anthra)
Non-BV
BVNon-BV
BV*Non-BV BV
Non-BV BV
Median PFS, mo
5.8 11.3 7.9 8.8 5.7 8.6 8.0 9.2
StratifiedHR (95% CI)
0.48(0.39–0.61)
0.62(0.48–0.79)
0.69(0.56–0.84)
0.64(0.52–0.80)
p-values p<0.0001 p=0.0003 p=0.0002 p<0.0001
BV=bevacizumab, Cape=capecitabine, Tax/Anthra=taxane/anthracycline.* 15 mg/kg cohort.
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Patient Characteristics, Pooled Population
Non-BV(n1008)
BV(n1439)
Age, median 55 yr 56 yr
Triple-negative disease, % 26 25
Disease-free interval (≤24 mo), % 39 37
Prior adjuvant chemo, % 64 62
Taxane 22 24
Anthracycline 52 48
Visceral disease, % 71 69
≥3 metastatic sites, % 38 41
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Progression-Free Survival, Pooled Population
Non-BV(n=1008)
BV(n=1439)
Median, mo 6.7 9.2
HR (95% CI) 0.64 (0.57–0.71)
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Analysis of PFS by Subgroups
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Objective Response Rate*
*Includes only patients with measurable disease at baseline.
Non-BV(n=788)
BV(n=1105)
50
0
45
40
35
30
25
20
15
10
5
32
49
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Overall Survival, Pooled Population
Non-BV(n=1008)
BV(n=1439)
Median, mo 26.4 26.7
HR (95% CI) 0.97 (0.86–1.08)
1-yr survival rate (%)
77 82
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Use of Subsequent Systemic Therapies in AVADO and RIBBON-1 Studies*
%Non-BV(n654)
BV(n1071)
Any chemotherapy 71 65
Bevacizumab 51 40
Any hormonal therapy 25 23
# of subsequent anti-cancer agents
≥4 27 23
3 15 12
2 27 26
1 10 15
*Data not available from E2100.
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Conclusions
• Significant PFS advantage but no OS difference with BV across 3 first-line studies and in pooled analysis
- In MBC, the ability of Phase III trials to demonstrate treatment effect upon OS depends on the duration of survival post-progression (SPP)
- Higher chance of affecting OS in populations with short SPP (20 month PPS in these 3 first-line trials)
• Patients with adverse prognostic features benefit from BV as do patients with more indolent disease
• Low incidence of treatment-related deaths with BV
• Safety profile consistent with previous BV experience
Broglio and Berry. 2009. J Natl Cancer Inst. 101:1642-49.Saad, Katz, and Buyse. 2010. J Clin Oncol. 28:1958-62.Burzykowski, et al. 2008. J Clin Oncol. 26:1987-92.
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A look at TNBC
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[TITLE]
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[TITLE]
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Facts and Prejudices
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• Regrowth• Toxicity• Age• Cost
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D Miles, JCO 2011
From discontinuation to death
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V Ranpura, JAMA 2011
Bevacizumab and FAEs
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Bevacizumab and FAEs
V Ranpura, JAMA 2011
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T Choueiri, JCO 2011
Bevacizumab and CHF
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Safety, Causes of Death*
%Non-BV(n982)
BV(n1679)
Total deaths 55.8 51.3
MBC 51.5 47.4
Treatment-related 1.8 2.1
Other 1.4 1.5
Missing 1.0 0.3
*Safety evaluable patient population.
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Grade ≥3 Selected Adverse Events (AEs), Pooled Population
%Non-BV(n982)
BV(n1679)
Neutropenia
7.1 10.0
Sensory neuropathy
8.5 9.5
Hypertension
1.2 9.0
Febrile neutropenia
3.5 6.5
Venous thromboembolic event
3.8 2.8
Proteinuria
0 2.3
Arterial thromboembolic event
0.3 1.6
Bleeding
0.4 1.5
Left ventricular systolic function
0.2 1.5
Wound dehiscence
0.3 0.8
Fistula
0.3 0.5
GI perforation
0.3 0.5
RPLS
0 <0.1
RPLS=Reversible posterior leukoencephalopathy syndrome.
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Grade ≥3 Selected Adverse Events (AEs), Pooled Population
%Non-BV(n982)
BV(n1679)
Neutropenia
7.1 10.0
Sensory neuropathy
8.5 9.5
Hypertension
1.2 9.0
Febrile neutropenia
3.5 6.5
Venous thromboembolic event
3.8 2.8
Proteinuria
0 2.3
Arterial thromboembolic event
0.3 1.6
Bleeding
0.4 1.5
Left ventricular systolic funct.
0.2 1.5
Wound dehiscence
0.3 0.8
Fistula
0.3 0.5
GI perforation
0.3 0.5
RPLS
0 <0.1
RPLS=Reversible posterior leukoencephalopathy syndrome.
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Elderly Patients
X Pivot, EJC 2011
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TJ Smith, & BE Hillner, NEJM 2011
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Cost-Effectiveness
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Conclusions
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• Question 1: Bevacizumab is approved for first line therapy of MBC patients. Is this indication appropriate?
• Question 2: Do the results of the AVADO (Docetaxel) and/or RIBBOn-1 trials represent a favorable risk-benefit analysis for the upfront therapy of MBC?
• Question 3:Do the results of the RIBBOn-1 and AVADO trials confirm the Clinical Benefit of Bevacizumab in combination with Paclitaxel for the initial treatment of patients with HER2- MBC?
• Question 4: Will the PFS time no longer be accepted as an endpoint without QoL data?
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Conclusions
• Neo-Angiogenesis is obviously important also in Breast Cancer
• Addition of Bevacizumab to CT results in a clear advantage in RR and PFS
• The advantage may be clinically very relevant in some situations (ie TNBC)
• Toxicity is manageable• Age and other factors are little relevant• Cost issue should be scientifically faced
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