Comparison of the antiangiogenic activity of modified RGDRGD
Fabio Puglisi Dipartimento di Oncologia Azienda Ospedaliero Universitaria di Udine Antiangiogenic...
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Transcript of Fabio Puglisi Dipartimento di Oncologia Azienda Ospedaliero Universitaria di Udine Antiangiogenic...
Fabio PuglisiDipartimento di Oncologia
Azienda Ospedaliero Universitaria di Udine
Antiangiogenic Treatment
Mediterranean School of Oncology
Inhibiting angiogenesis
• Regression of existing microvasculature– Secondary tumor cell death
(response)
• “Normalization” of surviving mature vasculature– Synergistic effect with
chemotherapy
• Prevention of vessel re-growth/neo-vascularization– Improves time to progression
First-line trials
Study designE-2100 AVADO Ribbon-1
CapecitabineRibbon-1
A/T
Placebo Controlled
No Yes Yes Yes
ChemotherapyWeekly
paclitaxelQ3w
DocetaxelCapecitabine
Q3w doc/nabP
AC/FAC/EC/FEC
Dose of bevacizumab
10 mg/kg q2wk
7.5 or
15 mg/kg q3wk
15 mg/kg q3wk 15 mg/kg q3wk
Primary endpoint
PFS PFS (IRF) PFS (Inv) PFS (Inv)
IRF review Retrospective Yes Yes Yes
INDEPENDENT REVIEW OF E2100
Gray R, et al, J Clin Oncol 2009
First-line trials
Patient population
E-2100 AVADO Ribbon-1 Capecitabine
Ribbon-1
A/T
N 673 736 615 622
ER/PgR- 35% 22% 23% 24%
≥ 3 sites 45% 46% 44% 45%
Measurable disease
73% 83% 80% 84%
Adjuvant Chemotherapy (Taxane)
65% (16%) 66% (15%) 72% (40%) 45% (15%)
First-line trials
Efficacy
E-2100 AVADO Ribbon-1 Capecitabine
Ribbon-1
A/T
Control
Arm
Beva
Arm
Placebo
Arm
Beva
Arm
7.5/15 mg/kg
Placebo
Arm
Beva
Arm
Placebo
Arm
Beva
Arm
ORR 25% 49% 49% 55%/63% 24% 35% 38% 51%
PFS months
5.9 11.8 8.2 9/10.1 5.7 8.6 8.0 9.2
HR0.60
P<.0001
0.86 P=.12 (7.5 mg)
0.77 P=.006 (15 mg)
0.69
P=.0002
0.64
P<.0001
OS months
25.2 26.7 31.9 30.8/30.3 21.2 29 23.8 25.2
HR0.88
P=.16
1.05/1.03
P=.72/.85
0.85
P=.27
1.03
P=.83
Relative increase in RR 20-50%
Bevacizumab in MBC meta-analysis of RcTs
Lee J-B, et al. Invest New Drugs 2009
Response rate
Bevacizumab in MBC meta-analysis of RcTs
Lee J-B, et al. Invest New Drugs 2009
Progression free survival
Bevacizumab in MBC meta-analysis of RcTs
Lee J-B, et al. Invest New Drugs 2009
Overall survival
Safety of Bevacizumab in MBC meta-analysis of RcTs
Lee J-B, et al. Invest New Drugs 2009
RR (95% CI) P value
Hypertension 18.46 (1.18-289.38) 0.038
Proteinuria 11.03 (2.09-58.21) 0.005
Bleeding 1.75 (0.48-6.40) 0.395
Trombo-embolic event 1.07 (0.63-1.84) 0.797
RIBBON-2: Phase III Trial of Second-Line Bevacizumab + Chemotherapy in MBC
Patients with previously
treated MBC (HER2
negative or HER2 status unknown)
(N = 684)
Chemotherapy Regimens*Taxane or
Gemcitabine orCapecitabine or
Vinorelbine
Bevacizumab 15 mg/kg every 3 wks or 10 mg/kg every 2 wks† +
Chemotherapy(n = 459)
Placebo + Chemotherapy (n = 225)
Treat until
disease progression
Stratified by chemotherapy regimen, time between MBC diagnosis and
first PD, and hormone receptor status; randomized 2:1
*Dose and schedule of chemotherapy regimens (selected by investigator): Taxane: paclitaxel 90 mg/m2/wk for 3 of 4 wks; paclitaxel 175 mg/m2, nab-paclitaxel 260 mg/m2, or docetaxel 75-100 mg/m2 every 3 wks.Gemcitabine 1250 mg/m2 on Days 1 and 8 every 3 wks.Capecitabine 2000 mg/m2 on Days 1-14 every 3 wks.Vinorelbine 30 mg/m2/wk every 3 wks.†Dose of bevacizumab dependent on chemotherapy regimen used.
Brufsky A, et al. SABCS 2009.
RIBBON-2: PFS
Brufsky A, et al. SABCS 2009
1.0
0
Pro
po
rtio
n o
f P
rog
res
sio
n F
ree
Duration of PFS (Mos)
0.8
0.6
0.4
0.2
0
Primary Endpoint of PFS, ITT Population
Median PFS: 7.2 vs. 5.1 mosHR: 0.78 (P = .0072)
Chemo/placebo (n = 225)
Chemo/bevacizumab (n = 459)
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34
Patients at Risk, nChemo/placeboChemo/bev
225 165 129 93 77 44 33 19 12 8 5 4 3 1 1 0 0 0459 381 334 254 190 130 87 47 27 18 9 5 2 1 1 0 0 0
Sorafenib 400 mg PO BID continuously +Capecitabine 1000 mg/m2 PO BID for 14 of 21 days
(n = 115)Patients with
locally advanced or metastaticbreast cancer
(N = 229)Placebo PO BID continuously +
Capecitabine 1000 mg/m2 PO BID for 14 of 21 days(n = 114)
Until disease
progression or
unacceptable toxicity
Stratified by visceral vs nonvisceral disease
SOLTI-0701: Phase IIb Study of Combination Sorafenib + Capecitabine
Baselga J, et al. SABCS 2009.
SOLTI-0701: PFS (ITT)
• Median PFS significantly longer with addition of sorafenib vs placebo:–6.4 vs 4.1 months–HR: 0.58 (95% CI: 0.41-0.81; P = 0.0006)
Baselga J, et al. SABCS 2009.
SOLTI-0701: safety
Baselga J, et al. SABCS 2009.
45
5 5 413
5 3 20
20
40
60
80
100
HFSR/HFS Diarrhea Dyspnea Neutropenia
Grade 3 AEsSorafenib + capecitabine (n = 112)
Placebo + capecitabine(n = 112)
Pat
ien
ts (
%)
The choice of the endpoint
Is overall survival still the
most appropriate endpoint in clinical trials of
metastatic breast cancer?
Probably no!
Survival post-progression
OS = PFS + SPPIf the progression eventis death, then SPP = 0
Broglio KR & Berry DA, JNCI 2009
Broglio, K. R. et al. J. Natl. Cancer Inst. 2009
Probability of statistically significant differences in overall survival (OS) as a function of median
survival postprogression (SPP)
First-line trials
Efficacy
E-2100 AVADO Ribbon-1 Capecitabine
Ribbon-1
A/TControl
Arm
Beva
Arm
Placebo
Arm
Beva
Arm
7.5/15 mg/kg
Placebo
Arm
Beva
Arm
Placebo
Arm
Beva
Arm
PFS months
5.9 11.8 8.2 9/10.1 5.7 8.6 8.0 9.2
HR0.60
P<.0001
0.86 P=.12 (7.5 mg)
0.77 P=.006 (15 mg)
0.69
P=.0002
0.64
P<.0001
OS months
25.2 26.7 31.9 30.8/30.3 21.2 29 23.8 25.2
HR0.88
P=.16
1.05/1.03
P=.72/.85
0.85
P=.27
1.03
P=.83
SPP
months19.3 14.9 23.7 21.8/20.2 15.5 20.4 15.8 16
CONCLUSIONS
• OS is a reasonable primary endpoint when median SPP is expected to be short but is too high a bar when median SPP is expected to be long (eg, longer than 12 months)
• As therapies for metastatic breast cancer improve, SPP would expect to increase, which may decrease the utility of OS as a clinical endpoint
Grazie per l’attenzione