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Therapy against HER2-positiveBreast Cancer
Joaquín ArribasVall d’Hebron Institute of Oncology (VHIO)Institució Catalana de Recerca i Studis Avançats (ICREA)
Summary
• Introduction: HER2 and p95HER2
• Antibodies against p95HER2 and response to anti-HER2 therapies
• HER2-induced cellular senescence in breast cancer progression and treatment
• Immune-therapy based on p95HER2
Summary
• Introduction: HER2 and p95HER2
• Antibodies against p95HER2 and response to anti-HER2 therapies
• HER2-induced cellular senescence in breast cancer progression and treatment
• Immune-therapy based on p95HER2
The EGFR (HER, ErbB) signaling pathway in breast cancer
A17
NRG
Nucleus
HER3
HER2
NRG
GeneExpressionPrograms
Introduction
HER2HER2
HER2HER2HER2
p95HER2
HER2 fragments in human tumors
PM
HER2
Gene expression
S S
p95HER2(648-CTF)
p95HER2(611-CTF)
Arribas et al (2010) Clin Can Res 16, 4226-4235Morancho et al (2013) Oncogene 32, 1452-1459
Introduction
HER3
NRG
p95HER2 and breast cancer progression
Pedersen K et al (2009) Mol Cell Biol 29, 3319-3331
Introduction
Summary
• Introduction: HER2 and p95HER2
• Antibodies against p95HER2 and response to anti-HER2 therapies
• HER2-induced cellular senescence in breast cancer progression and treatment
• Immune-therapy based on p95HER2
611
NGSVTCFGPEADQCVACAHYKDPPFCVARCPSGVKPDLSYMPIWKFPDEEGACQPCPINCTHSCVDLDDKGCPAEQRASPLTS
624 634 642 653630626
MPIWKFPDEEGACQPCPINCTHSCVDLDDKGCPAEQRASPLTS
600590580571
TM
N629 100-115 kDa p95HER2(611-CTF)HER2
Specific anti-p95HER2 antibodies (anti-100-115 kDa p95HER2 (611-CTF))
Parra-Palau et al (2010) Cancer Res 70, 8537-8546Sperinde J et al (2010) Clin Cancer Res 16:4226-4235
Analysis of p95HER2 expression in human breast tumor samples overexpressing HER2
Parra-Palau J L et al (2010) Cancer Res 70, 8537-8546
62 107
p95HER2 /CTFs
Lysates
CB11
CB11
32H2
62
CB11
32H2
107A B
147 147
CB11
32H2
HER2-positive breast cancer patient derived xenograftsPDX Subtype
173 HER2
67 HER2
118 Lum B
288 HER2
289 HER2
290 HER2
251 HER2Loading
control
75 -
100 -
150 -
250 -
kDa
PDX173 PDX67 PDX288 PDX289 PDX333 PDX144PDX251 PDX118PDX290
5 μm
PDX173 PDX67 PDX251 PDX118
Her
cept
est
anti-
p95H
ER2
H-Score+1 +2 +310 10 20
+1 +2 +310 10 20
+1 +2 +30 10 20
p95HER2 and response to trastuzumab + chemotherapy
******
***
PDX118
anti-HER2
anti-p95HER2
0
200
400
600
800
0 15 30 45 60
Tum
or v
olum
e (m
m3 )
Time (days)
Control Trastuzumab
***
0
250
500
750
1000
0 5 10 15 20 25 30 35 40 45
Tum
or v
olum
e (m
m3 )
Time (days)
Control
Trastuzumab
PDX118 (p95HER2-negative; lum B)
PDX67 (p95HER2-positive; HER2-enriched) PDX67
anti-HER2
anti-p95HER2
Parra-Palau J Ll et al (2014) J Natl Cancer Inst 106, dju291
Summary
• Introduction: HER2 and p95HER2
• Antibodies against p95HER2 and response to anti-HER2 therapies
• HER2-induced cellular senescence in breast cancer progression and treatment
• Immune-therapy based on p95HER2
Expression of p95HER2 may result in senescence
Dox + -
+ Dox
- Dox
-220
kDa
-120
-100
100 µm
Ponceau-S
Cel
l Num
ber
(rel
ativ
e to
day
0)
Time (days)
0
4
8
12
16
0 5 10
+Dox
-Dox
***
Angelini PD et al (2013) Cancer Res 73, 450-458
p95HER2-induced senescence secretome
MMP1 IL6 IL11 ANGPTL4
Angelini PD et al (2013) Cancer Res 73, 450-458
c
320 367
16316
-6
HER2p95HER2
Log2FC (-/+ Dox)
Log2
FC (-
/+ D
ox) p
95H
ER2
–Lo
g2FC
(-/+
Dox
) HER
2
b
-6
-4
-2
0
2
4
6
a
Proliferation Senescence
HER2 p95HER2
- Dox
HER2
p95HER2Transcriptome
Secretome p95HER2
MMP1
TFPI
KRT81
STC1
EPHA2
VEGFC
FSTL3
PODXL
SPTBN1 IL18
CLIP1
B4GALT1
TUBA4A
PLAUR
CDH3
AGR2
PVR
LAMA3
SPOCK1
IL11
PDLIM7
DSC2
LAMB3
EPPK1
HOMER3
ANGPTL4
LUMLAMC2
DST
ITGA2
ZN185
LAMB1
CD44
KIAA1609
MYH9
QSOX1
SERPINB1
IL6
CORO1C
PLOD2
CD55
LDLR
CD59
PRSS22
TSC22D2
CHST11
JAG1
B3GNT3
HS6ST2
MET
IL1RL1
FHL2
LOXL2
OLFML3
DBN1
ULBP2
p95HER2-induced senescence promotes metastasis cell non-autonomously
+ Dox
- Dox
MCF7 Tet-Off/p95HER2MDA-MB-231/Luc (1:1) -/+ Dox
Removal of primary tumor
Nor
mal
ized
pho
ton
flux
(x10
5 )
0.5
2.5
1.0
1.5
2.0
+ Dox - Dox + Dox - Dox
Nor
mal
ized
pho
ton
flux
22.2% 77.8%
*
MCF7 Tet-Off/p95HER2
MDA-MB-231/Luc
Angelini PD et al (2013) Cancer Res 73, 450-458
Purification of naturally occurring HCC1954 senescent cells
HCC1954CFSE lo HCC1954CFSE hi
40µm
0
100
200
300
400
1 100 10000
FL 1 Log
Cou
nts
0 days 7 days
0
100
200
300
400
1 100 10000
CSFE hi(5.3%)
0
10
20
30**
SA-b-gal
p21
gH2AX
53BP1 40µm
100µm
40µm
0
10
20
30
40SA-b-gal
p21
gH2AX / 53BP1
***
05
101520253035
Posi
tive
cells
(%)
**
Zacarias-Fluck M et al (2015) J Natl Cancer Inst 106, dju291
Secretory phenotype of naturally occurring HCC1954 senescent cells
02468
pg/m
l**IL-6
0
10
20
30
pg/m
l (X
10) **IL-8
0
10
20
30
pg/m
l
**AREG
Zacarias-Fluck M et al (2015) J Natl Cancer Inst 106, dju291
Naturally occurring senescent cells from a HER2-PDX secrete IL-6
A
HER2 SA-ß-gal
0
20
40
60
80
100Po
sitiv
e ce
lls (%
)IL6 (-)
IL6 (+)
p<0.0001 p<0.0001
1
10001
20001
30001
Fluo
resc
ence
(AU
)
4 105
3 105
2 105
1 105
0
p21IL6
HER2-PDX (culture)B
40µm
Zacarias-Fluck M et al (2015) J Natl Cancer Inst 106, dju291
IL-6 secreted by senescent cells is required for tumor growth
moIL-6 huIL-6
anti-moIL-6 anti-huIL-6
mIL-6
hIL-6 mIL-6
mIL-6
0,00,51,01,52,02,5
- +
pSTA
T3/S
TAT3 *
anti-huIL-6
anti-moIL-6+ anti-huIL-6anti-moIL-6
pSTAT3
STAT3
kDa-120
-120
0
100
200
300
400
0 10 20 30 40 50 60 70 80 90 100 110
Tum
or V
olum
e (m
m3)
Time (days)
anti-moIL-6
anti-moIL-6 + anti-huIL-6
* * *
*
Zacarias-Fluck et al (2015) J Natl Cancer Inst 107 (5): djv020
Senescent cells may contribute to tumor progression
MMP1
ICAM
IGFBP
AREG
ADAM9
IL8
IL6
Zacarias-Fluck et al (2015) J Natl Cancer Inst 107 (5): djv020
Summary
• Introduction: HER2 and p95HER2
• Antibodies against p95HER2 and response to anti-HER2 therapies
• HER2-induced cellular senescence in breast cancer progression and treatment
• Immune-therapy based on p95HER2
ERBB2 as a target in breast cancer therapy
Kroemer, G. et al (2015) Nature Medicine 10, 1128-11388
Inhibition of MHC expression
Humanized PDX models: strategies
Breast cancer
PBMC (healthy donors)PBMCs (matched patients)
TILs
CD34+ (cord blood)CD34+ (matched patients)
SubcutaneousOrthotopic
Vicario, R. et al (2015) unpublished