american association for cancer research investor meeting...
TRANSCRIPT
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American Association for Cancer ResearchInvestor Meeting
Targeting the Tumor Microenvironment
Copyright © 2016 Halozyme, Inc.
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Forward-Looking Statements
1
All of the statements in this presentation that are not statements of historicalfacts constitute forward-looking statements within the meaning of the PrivateSecurities Litigation Reform Act of 1995. Examples of such statements includefuture product development and regulatory events and goals, anticipatedclinical trial results and strategies, product collaborations, our businessintentions and financial estimates and results. These statements are basedupon management’s current plans and expectations and are subject to anumber of risks and uncertainties which could cause actual results to differmaterially from such statements. A discussion of the risks and uncertaintiesthat can affect these statements is set forth in the Company’s annual andquarterly reports filed from time to time with the Securities and ExchangeCommission under the heading “Risk Factors.” The Company disclaims anyintention or obligation to revise or update any forward-looking statements,whether as a result of new information, future events, or otherwise.
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American Association for Cancer ResearchInvestor Meeting
Opening Remarks
Dr. Helen TorleyPresident and CEO
April 18, 2016Copyright © 2016 Halozyme, Inc.
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Agenda
Time Topic Presenter
5 minutes Opening Remarks Dr. Helen TorleyPresident and CEO
10 minutes PEGPH20 Immuno-Oncology
Dr. Sanna RosengrenDirector, Immunology andCell Biology
10 minutes PEG-ADA2: PEGylated Adenosine Deaminase 2
Dr. Christopher ThanosSenior Director, Biotherapeutics Discovery
10 minutes HTI-1511: Anti-EGFR Antibody-Drug Conjugate
Dr. Christopher ThanosSenior Director, Biotherapeutics Discovery
15 minutes Questions and Answers All
10 minutes Focus on the Tumor Microenvironment Dr. Michael LaBarre
VP, Chief Scientific Officer
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Agenda
Time Topic Presenter
5 minutes Opening Remarks Dr. Helen TorleyPresident and CEO
10 minutes PEGPH20 Immuno-Oncology
Dr. Sanna RosengrenDirector, Immunology andCell Biology
10 minutes PEG-ADA2: PEGylated Adenosine Deaminase 2
Dr. Christopher ThanosSenior Director, Biotherapeutics Discovery
10 minutes HTI-1511: Anti-EGFR Antibody-Drug Conjugate
Dr. Christopher ThanosSenior Director, Biotherapeutics Discovery
15 minutes Questions and Answers All
4
10 minutes Focus on the Tumor Microenvironment Dr. Michael LaBarre
VP, Chief Scientific Officer
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Focus on the Tumor MicroenvironmentDr. Michael LaBarreVice President, Chief Scientific Officer
April 18, 2016
American Association for Cancer ResearchInvestor Meeting
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Our Focus: Developing Therapeutics That Target the Tumor Microenvironment (TME)
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• PEGylated human recombinant PH20 (PEGPH20)– to deplete hyaluronan (HA) in the TME and increase tumor access
• PEGylated adenosine deaminase 2 (PEG-ADA2)– to deplete adenosine (an immune checkpoint) in the TME
• Anti-EGFR-ADC (HTI-1511)– to bind preferentially to EGFR at low pH in TME and deliver cytotoxic
drug conjugate to tumor cells
Modify the TME Structure
Leverage the TME Biochemistry and Physiology
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The Tumor Microenvironment
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Collagen
Fibroblast
Vasculature
Macrophage
Treg MDSC
T cell
Adenosine
Cancer cell
MolecularReceptors
HA
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The Tumor Microenvironment
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Collagen
Fibroblast
Vasculature
Macrophage
Treg MDSC
T cell
Adenosine
Cancer cell
MolecularReceptors
HAHA and Collagen
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The Tumor Microenvironment
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Collagen
Fibroblast
Vasculature
Macrophage
Treg MDSC
T cell
Adenosine
Cancer cell
MolecularReceptors
HA
Immune Cells
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The Tumor Microenvironment
10
Collagen
Fibroblast
Vasculature
Macrophage
Treg MDSC
T cell
Adenosine
Cancer cell
MolecularReceptors
HA
Adenosine andMolecular Receptors
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The Tumor Microenvironment
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Collagen
Fibroblast
Vasculature
Macrophage
Treg MDSC
T cell
Adenosine
Cancer cell
MolecularReceptors
HA
Regions of- Low O2- Low pH
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The Tumor Microenvironment
12
Collagen
Fibroblast
Vasculature
Macrophage
Treg MDSC
T cell
Adenosine
Cancer cell
MolecularReceptors
HAHA and Collagen
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Hyaluronan (HA) Can Be a Barrier to Therapeutic and Immune Cell Access to Tumor Cells
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• HA is a Structural Carbohydrate– Hydrophilic, viscous polysaccharide
• Stabilizes the Tumor Microenvironment– Provides structure for extracellular and
cell surface components
1 Brekken et al. Anticancer Res. 20:3503 (2000) 2 Provenzano and Hingorani, Br J Cancer 108:1 (2013) 3 Thompson et al. Mol Cancer Ther. 9:3052 (2010) 4 Stylianopoulos et al. PNAS. 110:18632 (2013)5 Singha et al. . Mol Cancer Ther. 14:523 (2015)
HA (Red) surrounding a single breast cancer cell overexpressing HAS3 (Bright Green)
Kultti, et al. JBC. 2006,281:15821
HA Surrounding a Cancer CellRed Blood Cells
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Hyaluronan (HA) Can Be a Barrier to Therapeutic and Immune Cell Access to Tumor Cells
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• HA is a Structural Carbohydrate– Hydrophilic, viscous polysaccharide
• Stabilizes the Tumor Microenvironment– Provides structure for extracellular and
cell surface components
• Compromises Access to the Tumor – Increased tumor interstitial pressure1,2
– Vasculature compression3,4
– Can decrease therapeutic and immune cell access5
1 Brekken et al. Anticancer Res. 20:3503 (2000) 2 Provenzano and Hingorani, Br J Cancer 108:1 (2013) 3 Thompson et al. Mol Cancer Ther. 9:3052 (2010) 4 Stylianopoulos et al. PNAS. 110:18632 (2013)5 Singha et al. . Mol Cancer Ther. 14:523 (2015)
HA (Red) surrounding a single breast cancer cell overexpressing HAS3 (Bright Green)
Kultti, et al. JBC. 2006,281:15821
HA Surrounding a Cancer CellRed Blood Cells
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HA Accumulation Associated With Decreased Survival in Some Tumors in Clinical Trials
Negative correlation with survival also reported in gastric2, colorectal3, ovarian4, non-small cell lung5, metastatic breast6 and prostate cancers7
HA-highMedian Survival: 9.3 months
HA-low Median Survival: 24.3 months
1 Whatcott, et al. Clin Cancer Res. 21:15 (2015)2 Setala, et al. Br J Cancer 79:1133 (1999)3 Ropponen, et al. Cancer Res. 58:342 (1998)4 Antilla, et al. Cancer Res. 60:150 (2000)5 Pirinen, et al. Int J Cancer 95:12 (2001)6 Auvinen, et al. Am J Pathol. 156:529 (2000)7 Lipponen, et al. Eur J Cancer 37:849 (2001)
Pancreatic Ductal Adenocarcinoma1
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PEGPH20 Targets Hyaluronan in the TME
PEGPH20
Removal of HA by PEGPH20 demonstrated in HA-high tumor animal models to:
Decreaseintratumoral
pressure
Decompressvasculature
Increaseperfusion
Increase access for
therapeutics
Increase access for
immune cells
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PEGPH20 Decreased HA in an HA-high Wilms’ Tumor Animal Model
PEGPH20 37.5 µg/kg (HED)Vehicle
HA (brown) staining with HTI-601(HA-specific binding probe developed at Halozyme)
Cowell et al. (2016). AACR Annual Meeting, Poster #2463
WT-CLS1/HAS3 HA-high peritibial Wilms’ tumor model
HA StainingNuclear Staining
Tumors harvested 6h after 2 doses of Vehicle or PEGPH20 on days 0 and 3
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PEGPH20 Reduced Tumor Interstitial Fluid Pressure in HA-high Prostate Cancer Animal Model
Thompson et al. Mol Cancer Ther. 9:3052 (2010)
- 2 0 0 2 0 4 0 6 0 8 0 1 0 0 1 2 00 . 0
0 . 2
0 . 4
0 . 6
0 . 8
1 . 0
1 . 2
0 . 0 1 5
0 . 1 5
1 . 5
4 . 5
1 5
V e h ic le
T i m e a f t e r T r e a t m e n t ( m i n )
No
rma
liz
ed
Tu
mo
r IF
P
~40 mmHg
IV dose
PEGPH20 Dose (mg/kg)
PC3 peritibial prostate tumor model
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PEGPH20 Increased Tumor Perfusion inHA-high Prostate Cancer Animal Model
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PEGPH20 (24h)Vehicle (24h)
Hyperechoic microbubbles imaged to visualize vasculature “space” or vascular area of peritibial PC3 tumors ± PEGPH20 (15 mg/kg, IV). Blue tracing is tumor area.
Thompson et al. Mol Cancer Ther. 9:3052 (2010)
PC3 peritibial prostate tumor model
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Vascular Decompression Increased Drug Delivery in HA-high Prostate Cancer Animal Model
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0
5
1 0
1 5
2 0
2 5
3 0
3 5
P E G P H 2 03 hL i p o s o m a l
D o x o r u b i c in
A lo n e
*
L i p o s o m a l
D o x o r u b i c in
Tum
or
Lip
oso
ma
l Do
xo
rub
icin
(ng
/ µg
DN
A)
Increased drug accumulation not observed in normal tissues tested
Increased tumor DOXIL(measured as doxorubicin)
324%↑[doxorubicin]tum
* p < 0.05
PC3 peritibial prostate tumor model
Thompson et al. Mol Cancer Ther. 9:3052 (2010)
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0 7 1 4 2 1
0
2 5 0
5 0 0
7 5 0
1 0 0 0
1 2 5 0
1 5 0 0
D a y s o n S t u d y
Tum
or
Vo
lum
e,
mm
3 (
SE
M)
V e h i c le
P E G P H 2 0
V in + D A C T
P E G P H 2 0 + V in + D A C T
PEGPH20 37.5 µg/kg (HED), vincristine 0.415 mg/kg, dactinomycin 0.125 mg/kg 2x weekly Cowell et al. (2016). AACR Annual Meeting, Poster #2463
WT-CLS1/HAS3 HA-high peritibial tumor model
PEGPH20 Increased Activity of Vincristine and Dactinomycin in HA-high Wilms’ Tumor Animal Model
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22
0 7 1 4 2 1
0
2 5 0
5 0 0
7 5 0
1 0 0 0
1 2 5 0
1 5 0 0
D a y s o n S t u d y
Tum
or
Vo
lum
e,
mm
3 (
SE
M)
V e h i c le
P E G P H 2 0
V in + D A C T
P E G P H 2 0 + V in + D A C T
PEGPH20 37.5 µg/kg (HED), vincristine 0.415 mg/kg, dactinomycin 0.125 mg/kg 2x weekly Cowell et al. (2016). AACR Annual Meeting, Poster #2463
WT-CLS1/HAS3 HA-high peritibial tumor model
With PEGPH2010/10 Regressions
Without PEGPH205/10 Regressions
PEGPH20 Increased Activity of Vincristine and Dactinomycin in HA-high Wilms’ Tumor Animal Model
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PEGPH20 Increased Tumor Growth Inhibition of shIDO-ST in HA-high Pancreatic Cancer Animal Model
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0 1 0 2 0 3 0 4 0 5 0 6 0 7 0
0
5 0
1 0 0
1 5 0
2 0 0
2 5 0
3 0 0
s h I D O - S T
P E G P H 2 0
s h I D O - S T + P E G P H 2 0
V e h i c le
p < 0 . 0 1 , A N O V A
P o s t - t u m o r i m p l a n t a t i o n ( d )
log
ph
oto
ns
/s
(x
10
6)
Manuel et al. Cancer Immunol Res. 3:1096 (2015)
KPC-derived pancreatic cancer model
PEGPH20 2.25 mg/kg on day 13 shIDO-ST 5 x 106/dose on day 14, 15 and 16(n=3/group)
shIDO-ST: Salmonella typhimurium (ST) short hairpin RNA against IDO (shIDO)
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PEGPH20 With shIDO-ST Increased Immune Cell Influx in HA-high Pancreatic Cancer Animal Model
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Manuel et al. Cancer Immunol Res. 3:1096, Figure S8 (2015)
KPC-derived pancreatic cancer model
PEGPH20 2.25 mg/kg on day 13 shIDO-ST 5 x 106/dose on day 14, 15 and 16Tumors extracted 96 hours post-ST treatment
PEGPH20 + Control-ST PEGPH20 + shIDO-STEpi-fluorescence
Counts
Neutrophil accumulation
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PEGPH20 Increased Access of Various Drugs and Immune Cells in HA-high Tumor Animal Models
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1 Singha et al. Mol Cancer Ther. 14:523 (2015), 2 Singha et al. AACR Natl Mtg(2015), 3 Manuel et al. Cancer Immunol Res. 3:1096 (2015),4 Measured as paclitaxel in Osgood et al. AACR PDA Mtg.(2014), 5 Thompson et al. Mol Cancer Ther. 9:3052 (2010), 6 Kang et al. Halozyme new data to be submitted for publication, 7Jacobetz et al. GUT 62:112 (2013)
Leukocytes (e.g., NK cells1, T cells2, neutrophils3)
shIDO-ST cellular immunotherapy3
Liposomes/nanoparticles (e.g., ABRAXANE® 4, DOXIL® 5)
Monoclonal antibodies (e.g., cetuximab6, trastuzumab1)
Small molecules (e.g., gemcitabine7)smaller
larger
Relative Size
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10 minutes Focus on the Tumor Microenvironment Dr. Michael LaBarre
VP, Chief Scientific Officer
Agenda
Time Topic Presenter
5 minutes Opening Remarks Dr. Helen TorleyPresident and CEO
10 minutes PEG-ADA2: PEGylated Adenosine Deaminase 2
Dr. Christopher ThanosSenior Director, Biotherapeutics Discovery
10 minutes HTI-1511: Anti-EGFR Antibody-Drug Conjugate
Dr. Christopher ThanosSenior Director, Biotherapeutics Discovery
15 minutes Questions and Answers All
26
10 minutes PEGPH20 Immuno-Oncology
Dr. Sanna RosengrenDirector, Immunology andCell Biology
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PEGPH20 Immuno-Oncology
Dr. Sanna RosengrenDirector, Immunology and Cell Biology
April 18, 2016
American Association for Cancer ResearchInvestor Meeting
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The Tumor Microenvironment
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Collagen
Fibroblast
Vasculature
Macrophage
Treg MDSC
T cell
Adenosine
Cancer cell
MolecularReceptors
HA
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The Tumor Microenvironment
29
Collagen
Fibroblast
Vasculature
Macrophage
Treg MDSC
T cell
Adenosine
Cancer cell
MolecularReceptors
HAImmune Cell Involvement
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Anti-Tumor T Cells Face Immunosuppressive Barriers in the TME
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Tumorcell
Anti-tumorT cell
Antigen-presentingdendritic cell
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Anti-Tumor T Cells Face Immunosuppressive Barriers in the TME
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Blocking interaction
Legend
Anti-tumorT cell
CTLA4
PD-1
PD-1
Antigen-presentingdendritic cell
PD-L1PD-L1
Immune checkpoints
Tumorcell
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Anti-Tumor T Cells Face Immunosuppressive Barriers in the TME
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Tumorcell
Anti-tumorT cell
CTLA4
PD-1
PD-1
Antigen-presentingdendritic cell
PD-L1PD-L1
Immune checkpoints
Blocking interaction
Legend
M2macrophage
Myeloidsuppressor cell
RegulatoryT cell
Immuno-suppressive
cells
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Anti-Tumor T Cells Face Immunosuppressive Barriers in the TME
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Immuno-suppressive
cytokines and growth factors
GRADIENT
High Levels
Tumorcell
M2macrophage
Myeloidsuppressor cell
RegulatoryT cell
Anti-tumorT cell
CTLA4
PD-1
PD-1
Antigen-presentingdendritic cell
PD-L1PD-L1
Immuno-suppressive
cells
Immune checkpoints
Blocking interaction
Legend
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Some Biomarkers of Immunosuppression Increased in HA-high Colon Cancer Animal Model
34
C T 2 6
C T 2 6 /HA S 3
0
1
2
3
4
p = 0.002
C T 2 6
C T 2 6 /HA S 3
0
1
2
3
4
p = 0.008
C T 2 6
C T 2 6 /HA S 3
0
1
2
3
4
p = 0.009
Gen
e ex
pres
sion
(Act
b-no
rmal
ized
)
Other immunosuppressive genes, including PD-L1 and IDO, were not significantly different in this model
IL10(immunosuppressive
cytokine)
FoxP3(regulatory T cell marker)
CTLA4(immune checkpoint)
CT26/HAS3 HA-high syngeneic colon tumor model
Rosengren et al. (2016). AACR Annual Meeting, Poster #4886
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Does PEGPH20 Increase Activity of Anti-CTLA4 Antibodies in HA-high Tumors?
35
Cancer cell
Anti-tumorT cell
CTLA4
PD-1
PD-1
Antigen-presentingdendritic cell
PD-L1PD-L1
CTLA4 engagement blocks co-stimulation of activated T cells
Anti-CTLA4 antibodies can lower tumor immunosuppression
PEGPH20 might enhance their efficacy in HA-high tumors
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PEGPH20 Effect on Anti-CTLA4 Activity in HA-high and HA-low Colon Cancer Animal Models
36
0 5 1 0 1 50
5 0 0
1 0 0 0
1 5 0 0
2 0 0 0
2 5 0 0
Iso ty p e c o n tro l
P E G P H 2 0
A n ti-C TL A 4
P E G P H 2 0 + a n ti-C TL A 4
D a y o n S tu d y
Tum
or
Vo
lum
e (
mm
3)±
SEM
CT26/HAS3 HA-high model
PEGPH20 37.5 µg/kg (HED) biweekly, 24h prior to anti-CTLA4 or IgG2b isotype control (4 mg/kg)
p ≤ 0.002to anti-CTLA4and PEGPH20**
Rosengren et al. (2016). AACR Annual Meeting, Poster #4886
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PEGPH20 Effect on Anti-CTLA4 Activity in HA-high and HA-low Colon Cancer Animal Models
37
0 5 1 0 1 50
5 0 0
1 0 0 0
1 5 0 0
2 0 0 0
2 5 0 0
Iso ty p e c o n tro l
P E G P H 2 0
A n ti-C TL A 4
P E G P H 2 0 + a n ti-C TL A 4
D a y o n S tu d y
Tum
or
Vo
lum
e (
mm
3)±
SEM
CT26/HAS3 HA-high model
PEGPH20 37.5 µg/kg (HED) biweekly, 24h prior to anti-CTLA4 or IgG2b isotype control (4 mg/kg)
0 5 1 0 1 50
5 0 0
1 0 0 0
1 5 0 0
2 0 0 0
2 5 0 0
Iso ty p e c o n tro l
P E G P H 2 0
A n ti-C TL A 4
P E G P H 2 0 + a n ti-C TL A 4
D a y o n S tu d y
Tum
or
Vo
lum
e (
mm
3)±
SEM
CT26 HA-low model
Not significant
p ≤ 0.002to anti-CTLA4and PEGPH20**
Rosengren et al. (2016). AACR Annual Meeting, Poster #4886
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Does PEGPH20 Increase the Activity of Anti-PD-1/PD-L1 Antibodies in HA-high Tumors?
38
Cancer cell
Anti-tumorT cell
CTLA4
PD-1
PD-1
Antigen-presentingdendritic cell
PD-L1PD-L1
PD-1/PD-L1 interaction sends signal of exhaustion to T cell
Anti-PD-1/PD-L1 antibodies can lower tumor immunosuppression
PEGPH20 might enhance their efficacy in HA-high tumors
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PEGPH20 Increased Activity of Anti-PD-1 in HA-high Pancreatic Cancer Animal Model
39
KPC-derived HA-high pancreatic tumor model
PEGPH20 37.5 µg/kg (HED) 2x weekly, 24h prior to anti-PD-1 (0.5 mg/kg) Rosengren et al. (2016). AACR Annual Meeting, Poster #4886
0 5 1 0 1 5 2 00
5 0 0
1 0 0 0
1 5 0 0
2 0 0 0
2 5 0 0
V e h ic leP E G P H 2 0
D a y o n S tu d y
Tum
or
Vo
lum
e (
mm
3)
± S
EM
A n ti- P D - 1P E G P H 2 0 / a n ti- P D - 1
* p < 0.02 to anti-PD-1and PEGPH20
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PEGPH20 Increased Activity of Anti-PD-L1 in HA-high Pancreatic Cancer Animal Model
40
PEGPH20 37.5 µg/kg (HED) 2x weekly, 24h prior to anti-PD-L1 or IgG2b isotype control (2 mg/kg)
KPC-derived HA-high pancreatic tumor model
Rosengren et al. (2016). AACR Annual Meeting, Poster #4886
0 5 1 0 1 5 2 0 2 50
5 0 0
1 0 0 0
1 5 0 0
2 0 0 0
2 5 0 0
Is o ty p e c o n tr o l
A n ti-P D -L 1
D a y o n S tu d y
Tu
mo
r V
olu
me
(m
m3)
± S
EM
P E G P H 2 0 / is o ty p e c o n tro l
P E G P H 2 0 / a n ti-P D -L 1
*** p < 0.0001 to anti-PD-L1and PEGPH20
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- 2 0 0
0
2 0 0
4 0 0
6 0 0
8 0 0
1 0 0 0
1 2 0 0
1 4 0 0
% C
ha
ng
e T
um
or
Vo
lum
e f
rom
ba
selin
e
I so ty p ec o n tro l
P E G P H 2 0 /Iso ty p e c o n tro l
A n ti-P D -L1 P E G P H 2 0 /A n ti-P D -L1
PEGPH20 Combined With Anti-PD-L1 Induced Regressions in HA-high Pancreatic Cancer Animal Model
41
KPC-derived HA-high pancreatic tumor model
With PEGPH203/8 Regressions
PEGPH20 37.5 µg/kg (HED) 2x weekly, 24h prior to anti-PD-L1 or IgG2b isotype control (2 mg/kg) Rosengren et al. (2016). AACR Annual Meeting, Poster #4886
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Human Equivalent Dose of PEGPH20 Reduced HA in HA-high Pancreatic Cancer Animal Model
42
Pre-treatment24 hours after PEGPH20
(37.5 µg/kg)HA StainingNuclear Staining
KPC-derived HA-high pancreatic tumor model
HA (brown) staining with HTI-601(HA-specific binding probe developed at Halozyme)
PEGPH20 37.5 µg/kg (HED) 2x weekly, 24h prior to anti-PD-L1 or IgG2b isotype control (2 mg/kg) Rosengren et al. (2016). AACR Annual Meeting, Poster #4886
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PEGPH20 Enhanced Anti-PD-L1 Accumulation in HA-high Ovarian Cancer Animal Model
43
S al i n
e
P E GP H
2 0 37 . 5
µ pk
0
5 0 0 0
1 0 0 0 0
1 5 0 0 0
2 0 0 0 0
Me
an
de
ns
ity
(S
EM
)
(Ba
se
lin
e s
ub
tra
cte
d)
p = 0.006
SKOV3/HAS2 ovarian tumor model with anti-human-PD-L1-AlexaFluor 488
Anti-PD-L1PEGPH20 + Anti-PD-L1
Indi
vidu
al Tu
mor
s
Anti-PD-L1-AlexaFluor 488 Fluorescence Rosengren et al. (2016). AACR Annual Meeting, Poster #4886
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PEGPH20 Immuno-Oncology Program Highlights
44
HA-high tumor status may lead to a more immunosuppressive TME
In HA-high syngeneic mouse tumors, PEGPH20 enhanced the effect of immune checkpoint inhibitors
In HA-low mouse tumors, a combinatorial effect was not observed
PEGPH20 treatment increased anti-PDL1 antibody accumulation in ovarian tumor xenograft model with elevated HA
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10 minutes PEGPH20 Immuno-Oncology
Dr. Sanna RosengrenDirector, Immunology andCell Biology
10 minutes Focus on the Tumor Microenvironment Dr. Michael LaBarre
VP, Chief Scientific Officer
Agenda
Time Topic Presenter
5 minutes Opening Remarks Dr. Helen TorleyPresident and CEO
10 minutes HTI-1511: Anti-EGFR Antibody-Drug Conjugate
Dr. Christopher ThanosSenior Director, Biotherapeutics Discovery
15 minutes Questions and Answers All
45
10 minutes PEG-ADA2: PEGylated Adenosine Deaminase 2
Dr. Christopher ThanosSenior Director, Biotherapeutics Discovery
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PEG-ADA2: PEGylatedAdenosine Deaminase 2Dr. Christopher ThanosSenior Director, Biotherapeutics Discovery
April 18, 2016
American Association for Cancer ResearchInvestor Meeting
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The Tumor Microenvironment
47
Collagen
Fibroblast
Vasculature
Macrophage
Treg MDSC
T cell
Adenosine
Cancer cell
MolecularReceptors
HA
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The Tumor Microenvironment - Adenosine
48
Collagen
Fibroblast
Vasculature
Macrophage
Treg MDSC
T cell
Adenosine
Cancer cell
MolecularReceptors
HA
Adenosine Generation
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The Adenosine Pathway: A Recognized Immune Checkpoint Interaction
Pardoll DM, Nature Reviews Cancer 12, 252-264 (April 2012)
49
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Adenosine: A Key Suppressor of Immune Cells in Tumor Microenvironment
50
>100x IncreaseTumor Microenvironment Adenosine
~0.1 µM → ~50 µM
ATP
Tumor
Adapted from Stagg & Smyth, Oncogene, 2010
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Adenosine: A Key Suppressor of Immune Cells in Tumor Microenvironment
51
>100x IncreaseTumor Microenvironment Adenosine
~0.1 µM → ~50 µM
ATP
ATP
Tumor
Adapted from Stagg & Smyth, Oncogene, 2010
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Adenosine: A Key Suppressor of Immune Cells in Tumor Microenvironment
52
>100x IncreaseTumor Microenvironment Adenosine
~0.1 µM → ~50 µM
ATP
ATP
Tumor
CD39
Adapted from Stagg & Smyth, Oncogene, 2010
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Adenosine: A Key Suppressor of Immune Cells in Tumor Microenvironment
53
>100x IncreaseTumor Microenvironment Adenosine
~0.1 µM → ~50 µM
ATP
ATPAMP
Tumor
CD39
Adapted from Stagg & Smyth, Oncogene, 2010
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Adenosine: A Key Suppressor of Immune Cells in Tumor Microenvironment
54
>100x IncreaseTumor Microenvironment Adenosine
~0.1 µM → ~50 µM
ATP
ATPAMP
Tumor
CD73CD39
Adapted from Stagg & Smyth, Oncogene, 2010
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Adenosine: A Key Suppressor of Immune Cells in Tumor Microenvironment
55
>100x IncreaseTumor Microenvironment Adenosine
~0.1 µM → ~50 µM
ATP
ATPAdenosineAMP
Tumor
CD73CD39
Adapted from Stagg & Smyth, Oncogene, 2010
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Adenosine: A Key Suppressor of Immune Cells in Tumor Microenvironment
56
>100x IncreaseTumor Microenvironment Adenosine
~0.1 µM → ~50 µMSaturation of Adenosine Receptor Checkpoints on Immune Cells
neutrophilsblocks adhesion / extravasation(-) phagocytosis(-) superoxide & nitric oxide
macrophages(-) phagocytosis(-) superoxide & nitric oxide(-) TNF-α, IL-12, MIP-1α↓ MHC class II↑ IL-10, IL-6
endothelial cells(-) ICAM-1 & E-selectin
↑ VEGF and angiogenesis↑ βFGF, IGF-1
dendritic cells↑ IL-6, IL-8, TGFβ, VEGF, IDO
(-) IL-12
NK cells(-) IFN-γ(-) cytotoxicity
T cells(-) TCR-induced NF-κβ, IL-2, IL-4, IFN-γ(-) cytotoxicity(+) anergy(+) CD4+ T cell diff. to Foxp3+ or Lag-3+ Tregs
mast cells↑ IL-4, IL-8, IL-13
↑ VEGF
NKT cells(-) IFN-γ
(+) IL-4, IL-10, TGF-β
(-) BCR-induced NF-κB activation
B cells
Tumor
Adapted from Stagg & Smyth, Oncogene, 2010
ATP
ATPAdenosineAMP
CD73CD39
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ADA2: An Approach to Deplete Adenosine in the TME
57
ADA2
H20 NH4
1Zavialov AV, Biochem J. 391, p51-7 (2005)2Zavialov AV, J Biol Chem. 285(16):12367-77 (2010)3Wang et al. (2016). AACR Annual Meeting, Poster #1217
Human, extracellular glycoprotein, ~120,000 MW1,2
Catalyzes the deamination of adenosine to inosine1,2
Highly resistant to inactivation in plasma3
Produced in standard CHO cells3
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0
2
20
200
0 20 40 60 80
Act
ivity
(U/m
l)
Time (Hour)
ADA2-WT
PEG-ADA2-K374D
PEGylated ADA2: Improved Pharmacokinetics Profile in Animal Model
58
PEG-ADA2K374D extended PK profile in mice*• t1/2 = 37.6 hours• Less frequent dosing• Systemic dosing
Wang et al. (2016). AACR Annual Meeting, Poster #1217*Dosed at 3 mg/kg, n=9 mice/group
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Tumor Growth Inhibition With PEG-ADA2 inColon Cancer Animal Model
59
0 2 4 60
2 0 0
4 0 0
6 0 0
D a y o n S tu d y
Tum
or
Vo
lum
e, m
m3 (
SEM
)V e h ic leP E G A D A 2 - K 3 7 4 D
PEGADA2-K374D, 0.3 mg/kg 2X weekly, IV(N=8)
p < 0.0001
Murine CT26 colon tumor model
Wang et al. (2016). AACR Annual Meeting, Poster #1217
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PEG-ADA2 Increased T-cell Infiltration in CT26 Colon Cancer Animal Models
60
p re - d o se 6 - h o u rs p o s t - d o se0 .0
0 .1
0 .2
0 .3
0 .4
CD
3 p
osi
tive
ce
ll d
en
sity
5-fold increase
p < 0.001
Histological Assessment of T-cell infiltration
PEGADA2-K374D, 0.3 mg/kg 2X weekly, IV(N=8) Wang et al. (2016). AACR Annual Meeting, Poster #1217
Murine CT26 colon tumor model
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CD73 May Be a Useful Biomarker for Identifying Tumor Types That Could Respond to PEG-ADA2
61
CD39 CD73ATP AMP Adenosine
Wang et al. (2016). AACR Annual Meeting, Poster #1217
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CD73 May Be a Useful Biomarker for Identifying Tumor Types That Could Respond to PEG-ADA2
62
CD39 CD73ATP AMP Adenosine
B1 6 F 1 0 /S
C
B1 6 F 1 0 /IM
CT 2 6 /IM
L L C/S
C
L L C/IM
P a n 0 2 /SC
P a n 0 2 /IM
E MT -6
/SC
KLN
2 0 5 /SC
KLN
2 0 5 /IM
Mad is
o n -10 9 /S
C
4 T 1 /OT
MH
1 9 4 + P S C4 /IM
0 .0 1
0 .1
1
1 0
1 0 0
1 0 0 0
Fo
ld G
en
e e
xp
res
sio
nv
s C
T2
6/H
AS
3 I
M
CD39 Expression in Various Tumors*
B1 6 F 1 0 /S
C
B1 6 F 1 0 /IM
CT 2 6 /IM
L L C/S
C
L L C/IM
P a n 0 2 /SC
P a n 0 2 /IM
E MT -6
/SC
KLN
2 0 5 /SC
KLN
2 0 5 /IM
Mad is
o n -10 9 /S
C
4 T 1 /OT
MH
1 9 4 + P S C4 /IM
0 .0 1
0 .1
1
1 0
1 0 0
1 0 0 0
( , )CD73 Expression in Various Tumors*
*syngeneic mouse tumors Wang et al. (2016). AACR Annual Meeting, Poster #1217
Various solid tumor types tested
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PEG-ADA2 Mediated Tumor Growth Inhibition in CD73-Positive Animal Models
63
0 5 1 0 1 5 2 00
5 0 0
1 0 0 0
1 5 0 0
2 0 0 0
D a y o n S tu d y
Tum
or
Vo
lum
e, m
m3 (
SEM
)
V e h ic leP E G A D A 2 - K 3 7 4 D
0 5 1 0 1 50
5 0 0
1 0 0 0
1 5 0 0
D a y o n S tu d y
Tum
or
Vo
lum
e, m
m3 (
SEM
)
V e h ic le
P E G A D A 2 - K 3 7 4 D
* p < 0.0001* p < 0.0001
*
*
KPC-derived pancreatic modelKLN-205 lung model
PEGADA2-K374D, 0.3 mg/kg 2X weekly, IV(N=8) Wang et al. (2016). AACR Annual Meeting, Poster #1217
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Engineering ADA2 Yielded a Variant With a 16-fold Improvement in Enzymatic Activity
64
S265
R222
ADOAnalog PDB#
3LGG1
1Zavialov AV, J Biol Chem. 285(16):12367-77 (2010)2Wang et al. (2016). AACR Annual Meeting, Poster #1217
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Engineering ADA2 Yielded a Variant With a 16-fold Improvement in Enzymatic Activity
65
kcat/KM (1/Ms)
Wild-Type 10,312
R222Q/S265N2 165,411
S265
R222
ADOAnalog PDB#
3LGG1
1Zavialov AV, J Biol Chem. 285(16):12367-77 (2010)2Wang et al. (2016). AACR Annual Meeting, Poster #1217
16x improved
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10
1 0
2 0
3 0
4 0
66
Vehicle PEG-ADA2 R222Q/S265N
Study day 18, histological assessmentn=6 mice (vehicle), n=8 mice (treatment)2x weekly dosing, 0.3 mg/kg
Lung metastasesper mouse
1Wang et al. (2016). AACR Annual Meeting, Poster #1217
Mouse 4T1 breast cancer metastasis model
PEG-ADA2R222Q/S265N Inhibited Lung Metastasis in Breast Cancer Animal Model
p = 0.0183
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Treatment With PEG-ADA2 Decreased TME Adenosine Levels in Pancreatic Cancer Animal Model
67
0
1 0
2 0
3 0
U n tre a te dT u m o rs
P E G -A D A 2R 2 2 2 Q /S 2 6 5 N
KPC-derived pancreatic tumor model
1Wang et al. (2016). AACR Annual Meeting, Poster #12172Protocol from: Cancer Research 57, 2602-2605(1997)
TMEAdenosine
(µM)
KPC-derived mouse tumors 10 mm probe (55 kDa MWCO) Microdialysis perfusates analyzed by LC-MS
p = 0.0127
Measuring adenosine levels in a mouse TME (solid tumor)
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PEG-ADA2 Program Highlights
68
Adenosine: Attractive immune checkpoint target
• Abnormally high levels accumulate in the TME • Binds to receptor checkpoints on immune cells• Contributes to an immunosuppressive TME
PEG-ADA2: An engineered human enzyme that targets adenosine
• Improved pharmacokinetics and enzyme activity• Anti-tumor responses observed in several animal
models− Increase in T-cell infiltration− Decrease in high TME adenosine levels
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10 minutes PEG-ADA2: PEGylated Adenosine Deaminase 2
Dr. Christopher ThanosSenior Director, Biotherapeutics Discovery
10 minutes PEGPH20 Immuno-Oncology
Dr. Sanna RosengrenDirector, Immunology andCell Biology
10 minutes Focus on the Tumor Microenvironment Dr. Michael LaBarre
VP, Chief Scientific Officer
Agenda
Time Topic Presenter
5 minutes Opening Remarks Dr. Helen TorleyPresident and CEO
15 minutes Questions and Answers All
69
10 minutes HTI-1511: Anti-EGFR Antibody-Drug Conjugate
Dr. Christopher ThanosSenior Director, Biotherapeutics Discovery
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HTI-1511: Anti-EGFR Antibody-Drug Conjugate
American Association for Cancer ResearchInvestor Meeting
Dr. Christopher ThanosSenior Director, Biotherapeutics Discovery
April 18, 2016
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The Tumor Microenvironment
71
Collagen
Fibroblast
Vasculature
Macrophage
Treg MDSC
T cell
Adenosine
Cancer cell
MolecularReceptors
HA
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The Tumor Microenvironment – Molecular Receptors
72
Collagen
Fibroblast
Vasculature
Macrophage
Treg MDSC
T cell
Adenosine
Cancer cell
MolecularReceptors
HA
Molecular Receptors
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Two Limitations With Anti-EGFR Therapeutics
73
1Cunningham, NEJM 2004, 2Van Cutsem, JCO 2012, 3Amado, JCO 20084Misale, Cancer Discovery 2014, 5Barras, Biomarkers in Cancer, 20156Deerden, Annals in Oncology, 7Lee, JNCI 2013
Treatment can lead to skin rash
• May limit dosing • ~90% cutaneous side effects1-31
Downstream, activating mutations
• KRAS mutations present in over 50% of mCRC4
• BRAF mutations in ~10% of mCRC5
• EGFR mutations in ~3-19% of NSCLC in west6-72
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Physicochemical Properties Offer Opportunities for TME-Specific Therapeutics
74
Adapted from Lancet Oncol 2010; 11: 661–69
Solid tumor example
Hypoxia(pimonidazole)
Proliferation(iododeoxyuridine)
Blood vessel(immunofluorescent)
Acidic pH
Tumor microenvironment ↓ pH vs. Healthy Tissue
↑ Lactate↑ Albumin
1mm
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0
10
20
30
40
50
pH 6.0 pH 6.5 pH 7.4
Halozyme mAb has Attenuated In Vitro Binding to EGFR at Skin pH
75
EGFR
Bin
ding
(EC
50 n
g/m
L)
Acidic pH, TME conditions Skin pH
HALO MabCetuximab
Low Affinity
High Affinity
Huang,L. et al. (2016). AACR Annual Meeting, Poster #1472
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Halozyme mAb Attenuated Human Skin Bindingvs. Human Tumor Binding in Xenograft Models
76
CetuximabControl
Comparable, strong binding between tumor
and skin
Day 1 Day 2 Day 3
Huang,L. et al. (2016). AACR Annual Meeting, Poster #1472
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Halozyme mAb Attenuated Human Skin Binding vs. Human Tumor Binding in Xenograft Models
77
CetuximabControl
HALO Anti-EGFR
mAb
Comparable, strong binding between tumor
and skin
Strong tumor, attenuated skin binding
Day 1 Day 2 Day 3
Huang,L. et al. (2016). AACR Annual Meeting, Poster #1472
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ADCs May Treat EGFR+ Mutation-Resistant Tumors
78
EGFR
KRAS
BRAF
MEK
ERK/MAPK
MigrationSurvivalAngiogenesis
Proliferation
EGFR mediated signaling promotes cell
growth
EGF
Adapted from Pao, Nature Reviews Cancer 10, 760-774 (2010)
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ADCs May Treat EGFR+ Mutation-Resistant Tumors
79
EGF
NakedmAb
EGFR
KRAS
BRAF
MEK
ERK/MAPK
MigrationSurvivalAngiogenesis
Proliferation
EGFR mediated signaling promotes cell
growth
Naked anti-EGFR mAbinhibits signaling
pathway
KRAS
BRAF
MEK
ERK/MAPK
No signaling
EGF
Adapted from Pao, Nature Reviews Cancer 10, 760-774 (2010)
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ADCs May Treat EGFR+ Mutation-Resistant Tumors
80
EGF
NakedmAb
EGFR
KRAS
BRAF
MEK
ERK/MAPK
MigrationSurvivalAngiogenesis
Proliferation
EGFR mediated signaling promotes cell
growth
Naked anti-EGFR mAbinhibits signaling
pathway
Mutation promotes cell growth and is resistant to
mAb therapy
KRAS
BRAF
MEK
ERK/MAPK
KRASMut
BRAF
MEK
ERK/MAPK
MigrationSurvivalAngiogenesis
Proliferation
No signaling
BRAF
EGF
Adapted from Pao, Nature Reviews Cancer 10, 760-774 (2010)
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ADCs May Treat EGFR+ Mutation-Resistant Tumors
81
EGF
NakedmAb
EGFR
KRAS
BRAF
MEK
ERK/MAPK
MigrationSurvivalAngiogenesis
ProliferationReleased Cytotoxins
Internalized ADC
ADC
EGFR mediated signaling promotes cell
growth
Naked anti-EGFR mAbinhibits signaling
pathway
Mutation promotes cell growth and is resistant to
mAb therapy
ADC overcomesmutation resistance and selectively kills tumor cell
KRAS
BRAF
MEK
ERK/MAPK
KRASMut
BRAF
MEK
ERK/MAPK
KRASMut
BRAF
MEK
ERK/MAPK
MigrationSurvivalAngiogenesis
Proliferation
Tumor Cell DeathNo signaling
BRAF
EGF
ADC = antibody-drug conjugate
Adapted from Pao, Nature Reviews Cancer 10, 760-774 (2010)
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Tumor Regressions in KRAS- and BRAF-Mutated Tumor Animal Models
82
0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 1 0 0
0
5 0 0
1 0 0 0
1 5 0 0
2 0 0 0
2 5 0 0
H A L O V a ra n t 1 - M M A E (3 0 m g /k g )
H A L O V a r ia n t 1 - M M A E (1 0 m g /k g )
H A L O V a r ia n t 1 - M M A E (3 m g /k g )
V e h ic le
C e tu x im a b (3 0 m g /k g )
H A L O V a r ia n t 1 - M M A E (1 m g /k g )
↓
T im e (D a y s )
Tum
or V
olum
e (m
m3 )±
SE
M
MDA-MB-231M (KRASG13D)
6/6 Regressions, no evidence of tumors
*Dosing stopped at Day 38
0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 1 0 0 1 1 0
0
5 0 0
1 0 0 0
1 5 0 0
2 0 0 0
2 5 0 0
H A L O V a r ia n t 1 - M M A E (3 0 m g /k g )
H A L O V a r ia n t 1 - M M A E (1 0 m g /k g )
H A L O V a r ia n t 1 - M M A E (3 m g /k g )
H A L O V a r ia n t 1 - M M A E (1 m g /k g )C e tu x im a b (3 0 m g /k g )V e h ic le
↓
T im e (D a y s )
Tu
mo
r V
olu
me
(mm
3 )±
SE
M
HT29 (BRAFV600E)
*Dosing stopped at Day 39
Human TNBC Tumor Xenografts Human CRC Tumor Xenografts
Huang,L. et al. (2016). AACR Annual Meeting, Poster #1472n=6 mice group2X weekly dosing
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Next Generation ADC Technology
83
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9
# drugs / mAb # drugs / mAb
Random Lysine Conjugation Cysteine Conjugation
0 1 2 3 4 5 6 7 8 9
# drugs / mAb
Heterogeneous More homogeneous
1st Generation Chemistries ThioBridge™ Cysteine Conjugation
Thanos, 2016 in press
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HTI-1511: Anti-EGFR mAb Conjugated With Thiobridge-MMAE Highly Homogeneous
84
Chromatography Peak = HTI-1511• HALO anti-EGFR mAb• Thiobridge MMAE Chemistry• Drug: Antibody Ratio = 4
2.5 5.0 7.5 10.0 12.5 15.0 17.5 20.0 22.5
-2.0
5.0
10.0
15.0
20.0
25.0
mAU
Retention time (minutes)
12.4 min (1.8 %)
4 Drug Conjugates per mAb (98.2%)Analytical Hydrophobic
Interaction ChromatographyHALO
anti-EGFR mAb
4 ThiobridgeMMAE’s
Huang,L. et al. (2016). AACR Annual Meeting, Poster #1472
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Improved ADC Stability Observed in Primate Model
85
HTI-1511
Exposure Ratio (ER) = Group Mean AUC of ADC / Group Mean AUC of Total x 100
91% Intact ADC
Control HALO mAb1st Gen Conjugation
40% Intact ADC
0 10 20 300
100000
200000
300000
400000
200 400 600Time (hours)
Con
cent
rat io
n(n
g /m
L ,M
ean ±
SEM
)
0 10 20 300
100000
200000
300000
400000
200 400 600Time (hours)
Con
cent
rat io
n(n
g /m
L ,M
ean±
SEM
)
ADC Detection mAb Detection
Toxin on ADC Detection
Huang,L. et al. (2016). AACR Annual Meeting, Poster #1472
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Pilot Toxicology: Safety Profile Tested in Primate Model
86
Week 1 2 3 4
Cycle 1Endpoint
0Day 8 15 22 291
Dose
Parameters• Clinical observations and food consumption• Body weight • Dermal scoring• Clinical pathology • ECG and blood pressure• Veterinary physical examinations and ophthalmology • Histology• Pharmacokinetics
No unexpected findings observed at either dose (2.5 mg/kg and 8 mg/kg)
Safety profile met criteria for candidate nomination and further investment
Limited dermal scoring findings comparable with vehicle control group
Huang,L. et al. (2016). AACR Annual Meeting, Poster #1472
1 Cycle, 2 Dose Study Design, N=3 animals per group
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Complete Tumor Regressions Observed in Patient Derived (PDx) Tumor Models in Mice
87
NSCLC (EGFR+, KRASpG12C) PDx
0 2 0 4 0 6 0 8 0
0
5 0 0
1 0 0 0
1 5 0 0
2 0 0 0
2 5 0 0
S tu d y D a y
Tu
mo
r V
olu
me
(m
m3
)±
SE
M
V e h ic le
H T I-1 5 1 1
last dose
Cholangiocarcinoma (EGFR+, KRASpG12A) PDx
0 2 0 4 0 6 0
0
5 0 0
1 0 0 0
1 5 0 0
2 0 0 0
2 5 0 0
S tu d y D a yT
um
or
Vo
lum
e (
mm
3)±
SE
M
V e h ic le
H T I-1 5 1 1
last dose
N=8 mice / group 2.5 mg/kg (weekly dosing) Huang,L. et al. (2016). AACR Annual Meeting, Poster #1472
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HTI-1511 Anti-EGFR ADC Program Highlights
88
Engineered mAb with attenuated binding to human skin grafts
ADC mechanism targets KRAS- or BRAF-mutated tumors in mice
Utilization of next generation, Thiobridge chemistry• More homogeneous, stable
Safety profile met criteria for candidate nomination
Complete tumor responses observed in PDx tumor models
IND enabling studies underway
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10 minutes PEG-ADA2: PEGylated Adenosine Deaminase 2
Dr. Christopher ThanosSenior Director, Biotherapeutics Discovery
10 minutes PEGPH20 Immuno-Oncology
Dr. Sanna RosengrenDirector, Immunology andCell Biology
10 minutes Focus on the Tumor Microenvironment Dr. Michael LaBarre
VP, Chief Scientific Officer
Agenda
Time Topic Presenter
5 minutes Opening Remarks Dr. Helen TorleyPresident and CEO
10 minutes HTI-1511: Anti-EGFR Antibody-Drug Conjugate
Dr. Christopher ThanosSenior Director, Biotherapeutics Discovery
89
15 minutes Questions and Answers All
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Q&A
American Association for Cancer ResearchInvestor Meeting
90