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Evoluzione del trattamento del tumore mammario: dalla ricerca alla clinica
Nonantola, 18 Novembre, 2011
PierFranco ConteDipartimento di Oncologia, Ematologia e Malattie dell’ Apparato Respiratorio
Università di Modena e Reggio Emilia
AZIENDA OSPEDALIERO-UNIVERSITARIA DI MODENA
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– Where we are now
– How we got here
– Standard of Care for EBC
– Remaining questions
– The Challenges ahead
The Conquest of Breast Cancer: a few more steps ahead….
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http://globocan.iarc.fr/factsheets/cancers/breast.asp
TRENDS IN MORTALITY FROM BREAST CANCER IN SELECTED COUNTRIES: AGE-STANDARDISED RATE (W) PER 100,000
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– Where we are now
– How we got here
– Standard of Care for EBC
– Remaining questions
– The Challenges ahead
The Conquest of Breast Cancer: a few more steps ahead….
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P Autier et al; BMJ 2011
• Breast cancer mortality in three pairs of countries (North Ireland vs Rep. of Ireland, the Netherlands vs Belgium and Sweden vs Norway) from 1989 to 2006
• Countries in each pair had similar healthcare services, but differing implementation of mammography screening, with a gap of about 10-15 years
• No correlation between the introduction of screeening and reduction in breast cancer mortality
• The steepest fall in mortality observed was among the women under 50 who had not been invited for screening • Screening did not play a direct role in the reductions of breast cancer mortality
• Improvements in adjuvant treatment may be a more plausible explanation.
Breast cancer mortality in neighbouring European countries with differentlevels of screening but similar access to treatment: trend analysis of WHO mortality database
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Cancer Mortality in women - Italy
Adj HT Screening
Annu
al c
ance
r mor
talit
y /
100,
000
wom
en, a
ges
35–6
9*
70
60
50
40
30
20
10
0
70
60
50
40
30
20
10
0
1950 1960 1970 1980 1990 2000 2010
*Mean of annual rates in the component 6-year age groups
Source: WHO mortality andUN population estimates
ITALY1951–2001
Breast
Stomach
Uterus
Lung
AdjChemoRx
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EBCTCG META-ANALYSIS Adjuvant chemotherapy versus no treatment
5-y absolute DFS gain with polychemotherapy: - 14.6% in N+ pt under 50 y- 9.9% in N- pt under 50 y- 5.9% in N+ pt aged 50-69 y- 5.3% in N- pt aged 50-69 y
Lancet 365: 1687, 2005
50-69 N- 50-69 N+
< 50 N- < 50 N+
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EBCTCG META-ANALYSIS ER + EBC: Tamoxifen for 5y
EBCCTG, Lancet 2011
At 15 yrs, Tamoxifen increases DFS by 13.2% and OS by 9.2%
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– Where we are now
– How we got here
– Standard of Care for EBC
– Remaining questions
– The Challenges ahead
The Conquest of Breast Cancer: a few more steps ahead….
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1990 on: increasing use of anthracyclines
2000 on: increasing use of taxanes increasing use of aromatase inhibitors
2005 on: increasing use of trastuzumab
Adjuvant Treatment of EBC:Refinement of Standard of Care
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Anthra-based ChemoRx vs no ChemoRx10 y Breast Cancer Mortality
Patients # N+ 10y gain RR p
all 8575 82% 6.5 0.79 <0.00001
< 55 y 2808 70% 5.6 0.81 0.004
55-69 y 5373 88% 6.5 0.79 <0.00001
ER-poor 2076 73% 7.1 0.80 0.003
ER + 5433 86% 6.4 0.77 <0.00001
ER+& <55 y 1582 77% 5.6 0.83 0.05
ER+ & 55-69 y 3578 90% 6.0 0.78 0.0002
EBCTCG 2011 in press
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Anthra + Taxane vs non Taxane ChemoRx
(33,084 pts; 82% N+)
RR5 y
gainp
recurrence 0.86 2.9 <0.00001
BC mortality 0.88 1.4 0.0001
EBCTCG Meta-analysis
EBCTCG 2011 in press
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Adjuvant Chemotherapy for EBC
• Regimens of proven efficacy:– 1st generation: CMF, AC– 2nd generation: FAC, FEC, DC, AC/P– 3rd generation: FEC/D, AC/wP, ddAC/P,TAC
• Evidence and Recommendations:– Anthracycline/taxane based regimens provide meaningful DFS
and OS benefit – Sequential anthracycline/taxane are NOT inferior and more
tolerable than combined regimens – The most effective schedules are 3-weekly docetaxel and weekly
paclitaxel – TC x 4 is superior to AC x 4 (this is NOT one of the most active
regimen and should be considered only when anthracyclines are contraindicated)
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1990 on: increasing use of anthracyclines
2000 on: increasing use of taxanes increasing use of aromatase inhibitors
2005 on: increasing use of trastuzumab
Adjuvant Treatment of EBC:Refinement of Standard of Care
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Meta- Analysis of adjuvant trials of AIs vs Tamoxifen
M Dowsett et al, JCO 2010
UP-FRONT : • two trials (ATAC, BIG 01-98)• 9,856 patients• 8 y gain = 3.9 % in DFS, 0.5 % in OS
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M Dowsett et al, JCO 2010
SWITCH : • four trials (ARNO, IES, ITA, ABCSG VIII) • 9,015 patients• 6 y gain = 3.6 % in DFS, 1.7 % in OS
Meta- Analysis of adjuvant trials of AIs vs Tamoxifen
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Predictors of Early Distant Metastasis
• Patients treated with tamoxifen at greatest risk for distant metastasis, within the first 2.5 years – Age 75 years– Tumors 2 cm– Grade 2 1 node involved– Lymphovascular invasion– Not screen detected
Mansell J et al. Breast Cancer Res Treat 2008; Dec 27 [Epub ahead of print].
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Adjuvant Endocrine Therapy for HR+ EBC
• Treatments of proven efficacy:– Pre-menopause: Tamoxifen for 5y; LHRH agonists for 2-5y; Tam+LHRH– Post-menopause: AI for 5y; either sequence of Tam/AI for 5y – Extended adjuvant AI after 5y tamoxifen
• Evidence and Recommendations:– AIs provide a better DFS (OS gain ?) than Tamoxifen– Either sequence of Tam/Letrozole is not inferior to upfront Letrozole– Upfront AIs may be superior to sequential therapy in high risk pts– Extended adjuvant AIs may provide a DFS and OS gain in high risk pts
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1990 on: increasing use of anthracyclines
2000 on: increasing use of taxanes increasing use of aromatase inhibitors
2005 on: increasing use of trastuzumab
Adjuvant Treatment of EBC:Refinement of Standard of Care
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0 1 2
HERA 1 year (0.54)
Combined analysis 2 years (0.48)
Median follow-up (HR)
FavoursHerceptin
Favours noHerceptin
HR
BCIRG 006 DCarboH2 years (0.67)
2 years (0.61)BCIRG 006 ACDH
HERA 2 years (0.64)
N9831 AC-T-H 1.5 years (0.87)
PACS 04
FinHER VH / DH3 years (0.42)
4 years (0.86)
HER2+ Early Breast Cancer
Piccart-Gebhart NEJM 2005; Romond NEJM 2005; Slamon SABCS 2006; Smith, Lancet 2007; Perez ASCO 2005; Joensuu NEJM 2006; Spielmann SABCS 2007
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N9831- Sequential vs Concurrent Trastuzumab
E Perez et al, JCO 2011
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Slamon D et al. N Engl J Med 2011;365:1273-1283
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BCIRG 006 - outcomes
Slamon D et al. N Engl J Med 2011;365:1273-1283
ArmDFS Survival
Events # HR Events # HR
AC-T 257 1 141 1
AC-TH 1860.64
p< 0.00194
0.63 p< 0.001
TCH 2140.75 p= 0.04
1130.77 p=0.04
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Adjuvant Trastuzumab for HER2+ EBC
• Treatments of proven efficacy:– Any chemotherapy followed by trastuzumab for 1y– AC-TH followed by trastuzumab up to 1y– TCH followed by trastuzumab up to 1y
• Evidence and Recommendations:– Trastuzumab for 1y reduces the risk of relapse by 25-50%– Trastuzumab administered concomitantly to chemotherapy and up to 1y is superior to sequential administration alone– TCH is less cardiotoxic than AC-TH (is it also equally effective?)
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– Where we are now
– How we got here
– Standard of Care for EBC
– Remaining questions
– The Challenges ahead
The Conquest of Breast Cancer: a few more steps ahead….
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– Genomic assays to predict outcome and chemo-sensitivity of HR+ tumors
– Trastuzumab for small, N-ve HER2+ tumors
Adjuvant treatments of EBC Remaining questions
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Genomic assays to predict clinical outcome
C Sotiriou & L Pusztai
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Benefit of Tamoxifen or Chemotherapy by RS
0 2 4 6 8 10 12 14 16
Years
0 .0
0 .2
0 .4
0 .6
0 .8
1 .0
DR
FS
P lacebo Tam oxifen
Low Risk (RS<18)
0 2 4 6 8 10 12 14 16
Years
0 .0
0 .2
0 .4
0 .6
0 .8
1 .0
DR
FS
P lacebo Tam olxifen
Int Risk (RS 18-30)
0 2 4 6 8 10 12 14 16
Years
0.0
0.2
0.4
0.6
0.8
1.0
DR
FS
P lacebo Tamoxifen
High Risk (RS≥31)
NSABP B-14 NSABP B-20
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• OncotypeDx testing requests:
- more than 10,000 doctors
- 55 countries
- 175,000 patients
Genomic Health Web Site (november 2011)
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Meta-analysis: overall impact of RS on treatment decisions
Treatment plan prior to Oncotype DX®
Treatment plan after RS
Treatment plan after RS
4% change 33% change
Overall, the RS led to a 37% change in treatment decisions•33% from CT+HT HT•4% from HT CT+HT
CT + HT
HT
Hornberger J, et al. SABCS 2010. Poster P2-09-06.
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IHC4 score vs GHI-RS
Predicted TTDR for a >65ys patient with node-neg, 1-2cm poorly differentiated tumor receiving anastrozole.
Kaplan Meyer curves for either the 25° or 75° percentile of each score .
13.9%13.4%
9.2%
7.6%
Predicted 9-year distant recurrence probabilities for 25° and 75° percentiles of the IHC4 and GHI-RS scores for different G, Nodal status for a woman >65yrs with a 1-2cm tumor receiving anastrozole. Cuzick J et al, JCO 2011
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– Genomic assays to predict outcome and chemo-sensitivity of HR+ tumors
– Trastuzumab for small, N-ve HER2+ tumors
Adjuvant treatments of EBC Remaining questions
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High Risk of Recurrence for Patients with HER2+, Node-negative Tumors 1 cm or Smaller
Gonzalez-Angulo et al. J Clin Oncol 2009
93.7%
77.1%
95.8%
86.4%
p<0.0001 p<0.0001
• N=965, 10% HER2+ tumors• More T1a than T1b were HER2+ (32.3 vs 43.9%)• No patient got chemo or trastuzumab• All tissues were reviewed and re-measured• Median follow up: 6.2 yrs
RFS DRFS
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Supplement to: Slamon et al., NEJM 2011; 365:1273-83
BCIRG 006 – Subset analysis
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Characteristic Adjuvant trastuzumab trials (B31/N9831/HERA/FinHer/BCIRG006/PACS04)
Modena Cancer Registry
Age (median) 49 59
> 60 y % ~ 16 43.9
T1 % 44.5 71.9
N0 % 21 57.9
T1N0 % ~ 2 48.7
HER2+ EBC patients Adjuvant trastuzumab trials vs Modena Cancer Registry
Piccart N Engl J Med 2005; Romond N Engl J Med 2005; Joensuu N Engl J Med 2006; Slamon D, SABCS 2006;
Spielmann M et al, SABCS 2007; Federico M, RTM 1998-2007
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Adjuvant Trastuzumab for T1 N0 HER2+ EBC
• Prognosis of small, N0, HER2+ tumors is poorer
• Trastuzumab has shown efficacy in these patients • Small, node negative tumors as well as elderly patients, are
underepresented in clinical trials
• Cardiac safety and cardiac recovery in elderly patients treated with trastuzumab are basically unknown
• In these patients, competitive deaths are prevalent, and the decision to treat should be based on a careful evaluation of the risk/benefit ratio
• Trials designed for frail and low risk patients are warranted
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– Where we are now
– How we got here
– Standard of Care for EBC
– Remaining questions
– The Challenges ahead
The Conquest of Breast Cancer: a few more steps ahead….
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All Breast Cancers
ER+65-75%
HER2+15-20%
Triple negative
15%
Breast Cancer Diseases – 2011
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All Breast Cancers
ER+65-75%
HER2+15-20%
Triple negative
15%
HER3+
IGFR1+
p95+ 4%
P53mut
30-40 %
FGFR1Ampl 8%
PTENloss
30-50%
PI3Kmut
10%
BRCAMut
8%
Breast Cancer Diseases – 201…
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Clinical Genomics: The Next Frontier
Stratton, Campbell and Futreal Nature 2009 PhRMA Report 2011, Medicines in development for cancer
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ER+65-75%
mTOR inhibitorsPI3K inhibitors
New agents for the breast cancer molecular subtypes
LapatinibNeratinibPertuzumabTDM-1AntiHER2 combinationsTrastuzumab + mTORi
Triple negative15%
HER2+15- 20 %
New cytotoxics (eribulin, ixabepilone, vinflunine)Platinum saltsBevacizumabPARP inhibitorsAntiEGFR (Cetuximab, erlotinib)Anti androgens
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Neo-Adjuvant: A Faster Approach
Adjuvant Neo-adjuvant
Number of Patients thousands hundreds
Efficacy Endpoint DFS pCR
Primary analysis years after end of recruitment
months after end of recruitment
Biological Window No Yes
Functional Imaging No Yes
Sample Collection baseline multiple time points
Cost +++++ ++
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HER2+ EBCRCTs of PCT + dual antiHER2 blockade
Trial pts # Regimen pCR % (breast & N)
Neo-ALLTO1 455 wPac+T/L/TL 20 /27.6/46.9*
NeoSphere2 417 DT/DTP/TP/DP 21.5/39.3*/11.2/17.7
CherLob3 121 wP-FECT/L/TL 25.7/27.8/43.1*
* p value < 0.05T = trastuzumabL = LapatinibP = Pertuzumab
1Baselga J et al, SABCS 2010; 2Gianni L et al, SABCS 2010; 3Guarneri V et al, ASCO 2011
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ALTTO study design: use of lapatinib in adjuvant setting for ErbB2-positive breast cancer1
Surgery
Completion of all (neo) adjuvant anthracycline-based chemotherapy (≥4 cycles)
Design 1
No taxane
Design 2
Concomitant paclitaxel
(12 wks)
Trastuzumab LapatinibWash out
Lapatinib
Trastuzumab
Lapatinib + trastuzumab
Ra
ndo
mis
atio
n
12 wks 6 wks 34 wks
52 wksN = 8000 (2000 patients per treatment arm)
1. www.clinicaltrial.gov NCT00490139
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The Conquest of Breast Cancer: from Evidence Based to Personalized Medicine
• Breast Cancer mortality is declining because of earlier diagnosis and effective adjuvant treatments
• Randomized clinical trials have allowed to define the appropriate therapy for the average patient population
• The backbone of adjuvant treatments is based on the molecular characterization of the disease:
• HR+ Endocrine therapy• HER2+ AntiHER2 therapy• Triple negative Chemotherapy
• Clinical genomics will allow to move forward personalized cancer medicine:
• More refined prognosticators to spare unecessary therapy• More reliable predictors of sensitivity to administer individualized therapy• More reliable predictors of resistance to develop innovative therapies
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