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June 29, 2017
Jeiwook Chae, Ph.D.Chief Business Development Officer
LegoChem Biosciences, Inc.
Creating Next Generation ADCs with Industry Leading DAR Precision and Plasma Stability
GBC Korea 2017 | LegoChem Biosciences, Inc | 2
Agenda
▪ Backgrounder: Landscape of ADCs
▪ ADC Regulation Overview: Regulatory Requirements of ADCs by the US FDA
▪ LegoChem Bio’s ADC; site-specific conjugation and linker technologies and more
GBC Korea 2017 | LegoChem Biosciences, Inc | 3
Backgrounder: Landscape of ADCs
GBC Korea 2017 | LegoChem Biosciences, Inc | 4
ADC: Antibody-Drug Conjugates
ADC binds to Antigen Endocytosis
Proteolysis Drug release
ADC is an ideal drug for its high potency and specificity to the target antigen
GBC Korea 2017 | LegoChem Biosciences, Inc | 5
Milestones: FDA approved ADCs
IND submission FDA approval
1993 7 years
Gemtuzumab ozogamicin (Mylotarg) (accelerated approval)(withdrawn in 2010)
Brentuximab vedotin (Adcetris)(accelerated approval )
2006 20116 years
2000
Anti-CD30(Chimeric IgG1)
Peptide MMAE
S
Anti-CD33(humanized IgG4)
Hydrazone Calicheamicin
2005 2013
Ado-trastuzumab emtansine (Kadcyla)(T-DM1)
8 years
Anti-HER2(Humanized IgG1)
DM1Thioether
N
Source: Wen Jin Wu, MD, PhD, Senior Investigator, US FDA, “Regulatory considerations and Case Studies for Antibody Drug Conjugates”, Feb 2017
GBC Korea 2017 | LegoChem Biosciences, Inc | 6
FDA-approved ADCs: old failure and new success
1) Mylotarg (Pfizer): anti-CD33 gemtuzumab conjugated to calicheamycin (AML)
2) Adcetris (Takeda-Millenium / Seattle Genetics)
3) Kadcyla (Roche-Genentech / ImmunoGen)
FDA approved: Aug 2011 for relapsed Hodgkin lymphoma• 75% objective response rate in HL patients• 1/3 of the responders had complete remission
FDA approved: Feb 2013 for Herceptin breast cancer• 5.8 month longer survival than standard therapy• Significant longer progression-free survival
FDA approved: 2000, withdrawn 2010, resubmitted 2017
GBC Korea 2017 | LegoChem Biosciences, Inc | 7
ADC Market - Current and Future Sales
Units: Millions USD
ADC 2013 2014 2015 2016 2017(F) 2018(F) 2019(F) 2020(F) 2021(F) 2022(F)
Kadcyla 253 586 800 864 1,089 1,208 1,339 1,476 1,596 1,709
Adcetris 273 414 557 648 773 991 1,181 1,369 1,580 1,788
Source: Global Data (Accessed April 2017), Roche Annual Report, Seattle Genetics Annual Report; Manning, D. "Antibody-Drug Conjugates: Catalysts for Chemistry", Genetic Engineering & Biotechnology News, Vol. 37, No. 4, February 2017
Kadcyla’s global sales is expected to reach over $1 bn in 2017.
With 7-10 new commercial ADC launches projected in the next decade, the global ADC market is estimated at $10 billion annually after 2024.
500
1,000
1,500
2,000
2,500
3,000
3,500
2011 2012 2013 2014 2015 2016 2017(F) 2018(F) 2019(F) 2020(F) 2021(F) 2022(F)
ADC (Kadcyla, Adcetris) Sales Forecast
Kadcyla Adcetris
Millions
GBC Korea 2017 | LegoChem Biosciences, Inc | 8
Number of ADCs in active clinical testing
Source: ADC Beacon, World ADC Berlin, Feb 2017
GBC Korea 2017 | LegoChem Biosciences, Inc | 9
Increasing ADC IND submissions at US FDA
Source: Wen Jin Wu, MD, PhD, Senior Investigator, US FDA, “Regulatory considerations and Case Studies for Antibody Drug Conjugates”, Feb 2017
Nu
mb
er o
fA
DC
IND
s 4540353025201510
50
GBC Korea 2017 | LegoChem Biosciences, Inc | 10
Number of ADCs by disease indication
Notes:• Phase 2 trials include any trials that are phase 1/2 • Adcetris is in trials for solid tumors as well as licensed for hematological cancer
Source: ADC Beacon, World ADC Berlin, Feb 2017
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Increasing diversity of payloads
Notes:• At least 19 different payloads for ADCs have been tested in clinical trials• Rapid expansion since 2013• Several ADCs have not disclosed payload details
Source: ADC Beacon, World ADC Berlin, Feb 2017
GBC Korea 2017 | LegoChem Biosciences, Inc | 12
ADC component: Payloads
Source: Wen Jin Wu, MD, PhD, Senior Investigator, US FDA, “Regulatory considerations and Case Studies for Antibody Drug Conjugates”, Feb 2017
Nu
mb
ero
fp
rod
uct
s
454035302520 1510
50
Other
Traditional chemotherapies
Enzyme targeting agents
DNA targeting agents
Microtubule targeting agents
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ADCs in development
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Regulatory Requirements of ADCs by US FDA
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ADC Regulation Overview
• There is no specific Regulatory Guidance to Industry on ADC development
• FDA follows existing guidelines for small drugs and monoclonal antibodies toregulate ADC
• ADC review is a collaborative effort across product quality offices at FDA:
o Office of Biotechnology Products (OBP)/Office of Pharmaceutical Quality(OPQ) of CDER: antibody intermediate, and the drug substance (DS) and drug product (DP)
o Small molecule review groups in OPQ: review of the adequacy of the payload andlinker, conjugation reaction and aspects of the control strategy
Source: Wen Jin Wu, MD, PhD, Senior Investigator, US FDA, “Regulatory considerations and Case Studies for Antibody Drug Conjugates”, Feb 2017
GBC Korea 2017 | LegoChem Biosciences, Inc | 16
ADC success depends on optimization of each component
Source: Chari RV. Accounts of Chemical Research, 2008;41:98-107; Teicher BA. Current Cancer Drug Targets, 2009;9:982-1004
Attachment Site
Linker Payload
Antibody Linker / conjugation Drug (Payload)
• Target specificity (tumor):Drug delivery
• Target binding affinity: Unaltered compared to naked mAb
• Internalization: Rapid process
• Target expression: High on tumor cell surface, low in normal tissues
• Stable in plasma and labile in target cells to release drug in the active form
• Stable upon storage
•High potency
•Linkable
•Water soluble
•Validated mechanism of action
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Characterization of mAb intermediate and ADCmAb intermediate ADC-specific
Primary structure amino acid (aa) composition, N-terminal/C-terminal sequence analysis, peptide mapping
drug attachment sites
Conformationalstructure
size and charge variants, molecular weight drug load distribution anddrug/antibody ratio (DAR)
Posttranslational modifications
e.g., sialic acid determination, monosaccharide content and oligosaccharide profile analysis
Impurities product-related Impurities, e.g., dimers, aggregates and degradation products
process-related Impurities, e.g., microbialcontaminants, HCP, host cell DNA
free drug and its related substance, residual solvents, heavy metals and unconjugated mAb
Biological activity target specific binding and binding affinity, and effector function
cytotoxicity
• The expectations for the characterization of unconjugated mAb are the same whether or not it will be developed on its own or as part of an ADC
• Conjugation may impact on mAb: 1) binding affinity and effector function, 2) primary structure and posttranslational modifications , 3) size and charge variants.
Source: Wen Jin Wu, MD, PhD, Senior Investigator, US FDA, “Regulatory considerations and Case Studies for Antibody Drug Conjugates”, Feb 2017
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ADC DS and/or DP release specifications
• Appearance, pH, osmolality, totalprotein
• Identity
– binding
– charge based
– peptide mapping
• Impurities – drug
– free drug and its related substances
– residual solvents
– heavy metals
• Drug/antibody ratio
• Purity/Impurities – mAb
– monomer, fragments and
• aggregates
– charge variants
– unconjugated antibody
• Particulate matter (USP<788>)
• Safety
– Endotoxin
– bioburden/sterility
– Binding
– cytotoxicity assay
• Potency
Source: Wen Jin Wu, MD, PhD, Senior Investigator, US FDA, “Regulatory considerations and Case Studies for Antibody Drug Conjugates”, Feb 2017
GBC Korea 2017 | LegoChem Biosciences, Inc | 19
Drug/Antibody ratio (DAR) and drug load distribution (cysteine-linked ADC)
(Ouyang J. Antibody-Drug Conjugates, Methods Mol Biol 2013;1045:275-83.)
1. The hydrophobic interaction chromatography (HIC) method has been developed to determine the drug load distribution and DAR for cysteine-linked ADCs (similarly, MS-based method has been developed for lysine-linked ADCs)
2. Based on the drug load profiles, drug load distribution and DAR can be calculated3. Site of Attachment: Peptide map ‘fingerprint’ of drug-containing peptides shows consistency
between processes at different scales and sites
A representative HIC chromatogram
Source: Wen Jin Wu, MD, PhD, Senior Investigator, US FDA, “Regulatory considerations and Case Studies for Antibody Drug Conjugates”, Feb 2017
GBC Korea 2017 | LegoChem Biosciences, Inc | 20
DAR and drug load distribution
➢ They are critical product quality attributes➢ They determine the drug quantity to which the patient is exposed➢ Various drug-loaded forms may differ in their PK/PD characteristics
(Basa L. Antibody-Drug Conjugate, Methods Mol Biol 2013;1045:285-293)
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ADC Stability
• DS and DP stability studies‐ Stability testing methods and acceptance criteria‐ Test time/intervals‐ Storage conditions: long-term, accelerated and stressed‐ Stability indicating assays
• ADC serum stability‐ Linker stability
Source: Wen Jin Wu, MD, PhD, Senior Investigator, US FDA, “Regulatory considerations and Case Studies for Antibody Drug Conjugates”, Feb 2017; LegoChem Biosciences
GBC Korea 2017 | LegoChem Biosciences, Inc | 22
Issues identified in pre-IND meeting packages
1.The sponsor considered the small molecule of ADC as DS
- The small molecule potion of ADC is considered as an intermediate, and
antibody conjugated with small molecule via a linker is considered DS.2.The mAb potion of ADC was functioning to target cancer cells and was notconsidered as an active molecule in the ADC. Therefore, the sponsor thoughtthe antibody component would not need further CMC characterization
-The mAb is a component of the mechanism of action of ADC. The expectations for characterization of the mAb intermediate are the same whether the mAb is used alone or as part of a conjugated structure.
3.The sponsor proposed to use “non-GMP DM1 reagent” in the GMP manufacturing of preclinical and clinical lots of ADC
- DM1 is not a reagent. It is a drug substance intermediate. Therefore, DM1
should be manufactured under GMP.
Source: Wen Jin Wu, MD, PhD, Senior Investigator, US FDA, “Regulatory considerations and Case Studies for Antibody Drug Conjugates”, Feb 2017; LegoChem Biosciences
GBC Korea 2017 | LegoChem Biosciences, Inc | 23
ADC success depends on optimization of each component
Source: Chari RV. Accounts of Chemical Research, 2008;41:98-107; Teicher BA. Current Cancer Drug Targets, 2009;9:982-1004
Attachment Site
Linker Payload
Antibody Linker / conjugation Drug (Payload)
• Target specificity (tumor):Drug delivery
• Target binding affinity: Unaltered compared to naked mAb
• Internalization: Rapid process
• Target expression: High on tumor cell surface, low in normal tissues
• Stable in plasma and labile in target cells to release drug in the active form
• Stable upon storage
•High potency
•Linkable
•Water soluble
•Validated mechanism of action
GBC Korea 2017 | LegoChem Biosciences, Inc | 24
LCB’s ADC
GBC Korea 2017 | LegoChem Biosciences, Inc | 25
Unmet needs of ADC and LCB’s Solutions
Attachment Site
Linker Cytotoxin
Antibody Conjugation Linker Toxin
Limitation of conventional
ADCs
• Change of parental antibody’s properties (Aggregation ↑, toxicity ↑, stability ↓, T1/2 ↓)
• Random conjugation (heterogeneous mixture)
• Unstable linker • Premature toxin
release
• Conventional MOA• Less-potent for
different targets
Unmet needs & LCB’s
Solutions
✓ Preservation of parental antibody’s properties(Aggregation ↓, toxicity ↓, stability ↑, T1/2 ↑)
✓ Site-Specific Conjugation(homogenous)
✓ Plasma stable linker✓ Efficient toxin release
only within cancer cells
✓ Tailored Toxin for each ADC
✓ Differentiated Toxin with novel release MOA
Creating site-specific ADCs using LCB’s proprietary linker with superior plasma stability
GBC Korea 2017 | LegoChem Biosciences, Inc | 26
Limits of First Generation ADCs
0 1 2 3 4 5 6 7 8 9
Drug Distribution
0 1 2 3 4 5 6 7 8 9
Drug Distribution
Highly Heterogeneous
• 80-90 Lysine residues/mAb
• ~50% of Lysine is available for drug conjugation
• >2000 isomers when 2 drugs are attached
• Loss of Lys charges mAb integrity is disturbed
Less heterogeneous than Lys-ADC
• 4 inter-chain Cysteine pairs/mAb
• 3 isomers generated when 2 drugs are attached
• Structural integrity of the antibody is disturbed
Cys-ADC
Lys-ADC
Higher drug-loaded species → antibody character ↓, ADC stability ↓, T1/2 ↓, aggregation ↑ → Therapeutic Index ↓
GBC Korea 2017 | LegoChem Biosciences, Inc | 27
Thiol-Maleimide Conjugation
N
O
O
DrugmAb SH
mAb S
N
O
O
Drug
S
N
O
O
Drug
R
blood stream(pH ~ 7.4)R-SH
RSH : albumin cystein, GSH
Thiol-maleimide conjugate
“Recently, it was shown that a slow transfer of the drug from the ADC to albumin cysteines in the plasma occurs with alkyl-maleimide ADCs”
Bioconjugate Chem, 2010, 21, 5
Resulting in off-target toxicity → Therapeutic Index ↓
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LCB’s next-generation ADC Platform (ConjuAll™)
LCB’s ADC Approach
Site-SpecificConjugation
Linker Stability
Efficient ToxinRelease
Universality(Ab carrier, Toxins)
Tailored DAR & hybrid toxins
✓ Defined DAR
✓ PK of ADC = mAb PK
✓ Simple 2-step process (Efficient production)
✓ Proprietary conjugation patent granted in the US
✓ Superior stability (best stability globally)
✓ Proprietary linker patent granted
✓ Efficient toxin release with cancer cells vs. competitors
✓ Using trigger for toxin release (beta-glucuronide/ cancer-specific lysosomal glucuronidase)
✓ Antibodies: Various antibodies including Herceptin, Mesothelin, CD19
✓ Toxins: Diverse toxins incl. MMAE, MMAF, PBD, etc.
✓ Extended applicability to Protein-Drug Conjugates (PDCs)
✓ Tailored DAR, defined distribution (DAR = 2, 4, 6, 8…)
✓ Allowing the use of hybrid toxins (Dual payloads) across different indications
DAR 2
DAR 4
DAR 6
DAR 8
Hybrid
Plasmid
GBC Korea 2017 | LegoChem Biosciences, Inc | 29
Summary: LCB’s Solutions to conventional ADCs
LCB’s Linker Genentech’s Linker (Jan 2016)
Site-Specific Conjugation PK of ADC = mAb PK
Linker Stability
LCB’s Approach
Cancer-Specific Release
Toxin release by beta-glucuronide trigger
1
10
100
0 2 4 6 8 10 12 14
Pla
sm
a c
on
ce
ntr
ation
(μ
g/m
L)
Time (day)
ADC (rat PK, 3 mpk, IV)ADC14-0110_DAR2
Herceptin
LCB HER2 ADC
Summary of LCB HER2 ADC
Significantly better
▪ Efficacy
▪ DAR Stability
▪ PK Profile
compared to competitor’s HER2 ADC
GBC Korea 2017 | LegoChem Biosciences, Inc | 31
HIC AnalysisLCB14-0110(Herceptin-LC-LBG*-MMAF, DAR2)
farnesyl pyrophosphate analog (FPP)
mAb-CAAX
mAb-CAAX-FPP
mAb-CAAX-FPP-linker-drug
Enzymatic Rxn.
Chemical Rxn.
LCB’s Linker-Drug
* LBG: LCB’s proprietary BG linker
Herceptin-LC-CAAX after prenylation
30ug loaded
Herceptin-LC-CAAX20ug loaded
LCB14-0110(ADC) 30ug loaded
LCB’s ADC preparation is highly efficient and homogeneous
GBC Korea 2017 | LegoChem Biosciences, Inc | 32
HIC AnalysisLCB14-0110(Herceptin-LC-LBG*-MMAF, DAR2)
farnesyl pyrophosphate analog (FPP)
mAb-CAAX
mAb-CAAX-FPP
mAb-CAAX-FPP-linker-drug
Enzymatic Rxn.
Chemical Rxn.
LCB’s Linker-Drug
* LBG: LCB’s proprietary BG linker
Herceptin-LC-CAAX after prenylation
30ug loaded
Herceptin-LC-CAAX20ug loaded
LCB14-0110(ADC) 30ug loaded
LCB’s ADC preparation is highly efficient and homogeneous
GBC Korea 2017 | LegoChem Biosciences, Inc | 33
DAR AnalysisLCB14-0110(Herceptin-LC-LBG*-MMAF, DAR2)
a
a
Data generated by Prof. Young G. Shin
* LBG: LCB’s proprietary BG linker
DAR2 is confirmed with intact protein analysis using Q-TOF
GBC Korea 2017 | LegoChem Biosciences, Inc | 34
PK Profile and DAR stabilityLCB14-0110(Herceptin-LC-LBG*-MMAF, DAR2)
* LBG: LCB’s proprietary BG linker
Drug-Antibody Ratio (DAR) in Monkey
Drug-Antibody Ratio (DAR) in Rat
Superb DAR stability
LCB14-0110
LCB14-0110 (N=2, infusion)
GBC Korea 2017 | LegoChem Biosciences, Inc | 35
PK ProfileThio-trastuzumab vc-MMAE (Genentech)
Sukumaran et al., 2014
In Thio-trastuzumab vc-MMAE, relatively rapid decrease of higher DAR fraction observed in mice
GBC Korea 2017 | LegoChem Biosciences, Inc | 36
PK Profile LCB14-0110(Herceptin-LC-LBG*-MMAF, DAR2)
Terminal half-life (day)
Herceptin Kadcyla LCB14-0110
Rat 12.5 (3 mpk) 3.8 (6 mpk) 9.8 (3 mpk)
Monkey 8.3 (3 mpk) 2.5 (3 mpk) 10.9 (3 mpk)
Human 28.5(4 2 mpk) 4 (3.6 mpk) TBD
AUC (µg*day/mL)
Herceptin Kadcyla LCB14-0110
Rat 481.1±104.3 (3 mpk) 426±28.1 (6 mpk) 366.9±69.2 (3 mpk)
Monkey 623.1±78.2 (3 mpk) 180 ±15.0 (3 mpk) 838.8±114 (3 mpk)
Human 578 (4 2 mpk) 300 (3.6 mpk) TBD
Much better PK profile than Kadcyla
* LBG: LCB’s proprietary BG linker
GBC Korea 2017 | LegoChem Biosciences, Inc | 37
In vivo Anti-tumor Efficacy (JIMT-1, Her2 2+)
HER2-ADC in Kadcyla-resistant
Breast Cancer Xenograft Model
* Data generated by Asan Medical Center
LCB’s anti-HER2-ADCs
Linker-toxin/DAR
LCB14-0110 LBG-MMAF/DAR2
LCB14-0127 LBG-MMAF/DAR4
single iv. dosing
0
500
1,000
1,500
2,000
2,500
3,000
0 10 20 30 40 50 60 70 80 90
Tu
mo
r vo
lum
e (
mm
3)
Day after treatment
PBS
Herceptin 5mpk
ADC14-0110 2mpk
ADC14-0110 5mpk
ADC14-0127 2mpk
ADC14-0127 5mpk
• Herceptin resistant, HER2 positive breast cancer cell-line (IHC : Her2 2+)• Herceptin has no efficacy at 5 mpk• Herceptin(5 mpk) ≪ LCB14-0110 ≪ LCB14-0127• DAR4 > DAR2 at 2 mpk & 5 mpk in terms of efficacy
* LBG: LCB’s proprietary BG linker
LCB14-0110, 2mpk
LCB14-0110, 5mpk
LCB14-0127, 2mpk
LCB14-0127, 5mpk
GBC Korea 2017 | LegoChem Biosciences, Inc | 38
Anti-HER2 ADCIn vivo Anti-tumor Efficacy (NCI-N87): LCB14-0110 (Herceptin-LC-LBG*-MMAF)
01280127
01130110
T-DM1
0133
Herceptin
PBS
HER2-ADC in Gastric Cancer
Xenograft ModelLCB’s anti-HER2-ADCs
Linker-toxin/DAR
LCB14-0110 LBG-MMAF/DAR2
LCB14-0113 LBG-MMAE/DAR2
LCB14-0127 LBG-MMAF/DAR4
LCB14-0128 LBG-MMAE/DAR4
LCB14-0133 VC-MMAF/DAR2
single iv. dosing
• Herceptin has no efficacy at 5 mpk• Herceptin(5 mpk) << T-DM1(2mpk) < ADC110, ADC113 << ADC127, ADC128• DAR4 > DAR2 at 2 mpk in terms of efficacy• MMAF≒MMAE at 2 mpk in terms of efficacy
* Data generated by Asan Medical Center
* LBG: LCB’s proprietary BG linker* LC: Light Chain
* LBG: LCB’s proprietary BG linker
LCB14-0110, 2mpk
LCB14-0127, 2mpk
LCB14-0113, 2mpk
LCB14-0128, 2mpk
LCB14-0133, 2mpk
LCB14-0110LCB14-0113
LCB14-0127LCB14-0128
LCB14-0133
GBC Korea 2017 | LegoChem Biosciences, Inc | 39
Anti-HER2 ADCIn vivo Anti-tumor Efficacy (PDX): Herceptin-LC-LBG*-MMAF
LBG-MMAF/DAR4
0
500
1000
1500
0 5 10 15 20 25 30 35 40 45 50
Tum
or
volu
me
(mm
3)
Days after treatment
HER2-ADC in Gastric Cancer PDX Model
PBS T-DM1 2 mpk DAR4 ADC 2mpk
single iv. dosing
HER2 positive, IHC3+, gastric cancer patient
Collaboration with Professor Choi Eun Kyung in Asan Medical Center
* LBG: LCB’s proprietary BG linker
LC-LBG-MMAF shows excellent efficacy against HER2-positive, IHC3+Patient-derived gastric cancer model
* LBG: LCB’s proprietary BG linker
GBC Korea 2017 | LegoChem Biosciences, Inc | 40
Anti-HER2 ADCIn vivo Anti-tumor Efficacy (PDX): Herceptin-LC-LBG*-MMAF
LBG-MMAF/DAR4
* LBG: LCB’s proprietary BG linker* LC: Light Chain
Collaboration with Professor Choi Eun Kyung in Asan Medical Center
0
400
800
1200
1600
0 5 10 15 20 25 30 35 40
Tum
or
volu
me (m
m3)
Days after treatment
HER2-ADC in Gastric Cancer PDX Model
PBS
DAR2 ADC (5mg/kg, Q2Wx2)
T-DM1 (5mg/kg, Q2Wx2)
DAR4 ADC (5mg/kg, Q1D)
DAR4 ADC (5mg/kg, Q2Wx2)
DAR4 ADC (2mg/kg, Q2Wx2) HER2 positive, IHC2+, gastric cancer patient
Q2W iv. dosing
LC-LBG-MMAF shows excellent efficacy against HER2-positive, IHC2+Patient-derived gastric cancer model
* LBG: LCB’s proprietary BG linker
GBC Korea 2017 | LegoChem Biosciences, Inc | 41
Anti-HER2 ADCIn vivo Anti-tumor Efficacy (SK-OV3): LCB14-0110 (Herceptin-LC-LBG*-MMAF)
* Data generated in-house
HER2-ADC in Ovarian
Cancer Xenograft Model
single iv. dosing
0
500
1,000
1,500
2,000
2,500
3,000
3,500
0 5 10 15 20 25 30 35
Tu
mo
r V
olu
me (
mm
3)
PBS
Herceptin 5mpk
T-DM1 5mpk
ADC14-0110 5mpk
* LBG: LCB’s proprietary BG linker* LC: Light Chain
LCB14-0110 LBG-MMAF/DAR2
LCB14-110(LC-LBG-MMAF) shows excellent efficacy against ovarian cancer cell line SK-OV3
* LBG: LCB’s proprietary BG linker
LCB14-0110, 5mpk
GBC Korea 2017 | LegoChem Biosciences, Inc | 42
Key Comparisons Summary
Conventional Approaches LCB’s Approach
ADC structure▪ Heterogeneous Mixture -difficulties in
CMC (reproducibility, impurity profiles…)▪ With defined mAb-drug ratio w/o stereo
isomers
DAR ▪ Heterogeneous, ~4 (average) ▪ 2, 4 (higher, if necessary)
Conjugation method
▪ Mostly thiol-maleimide method▪ With disruption of mAb structure
(@cys or lys)
▪ No thiol-maleimide route employed▪ Minimum perturbation of original
structure
Linker chemistry▪ Unstable (retro Michael reaction of thiol-
maleimide) lowers therapeutic index▪ Cleavable (LBG) & non-cleavable▪ Highly stable
GBC Korea 2017 | LegoChem Biosciences, Inc | 43
Efficacious and Stable ADC with Wider TI
1st generation technology with non-site-specific, unstable linker → Narrow Therapeutic Index (TI)
Source: Panowksi, Siler, et al. (2014) "Site-specific antibody drug conjugates for cancer therapy", MAbs, v.6(a); 2014 Jan 1 (modified by LCB)
Therapeutic Window
Toxic dose (MTD)
Efficacious dose (MED)
Therapeutic Window
Toxic dose (MTD)
Efficacious dose (MED)
Wider Therapeutic Window
Toxic dose (MTD)
Efficacious dose (MED)
Dru
g D
ose
Lowering toxicity through plasma stable linker and selective delivery to tumor cells
Increasing efficacy by efficient in-tumor toxin release and superior PK
1st generation ADCsChemotherapy LCB’s next-generation ADC
GBC Korea 2017 | LegoChem Biosciences, Inc | 44
LCB Pipelines of ADCProduct / Target Indication Discovery Preclinical Partner Commercial Rights
AD
C P
rod
uct
s
HER2 Solid tumorLCB: Worldwide (ex China)
Fosun: Greater China
Undisclosed Solid tumor Takeda: Worldwide
Mesothelin Solid tumor LCB and Green Cross
Undisclosed Solid tumorLCB: Worldwide (antibody in-licensed from Samsung Medical Center)
Undisclosed ALL, NHL, DLBCL LCB and Novimmune
CD37 NHL, CLL, AML LCB and Nordic Nanovector
Undisclosed CLL, MCL, Solid tumor LCB and Ardeagen
Undisclosed Various LCB and Theranyx
Undisclosed CLL, MCL, Solid tumor LCB and ABL BIO
Undisclosed Solid tumor LCB and ABL BIO
Undisclosed Various LCB and Y Biologics
Undisclosed Solid tumor LCB and Company S
Undisclosed Solid tumor LCB and Company M
PNS* Undisclosed LCB and Seasun Biomaterials
* PNS: Peptide nucleic acid
Company S (EU)
Company M (EU)
Available for out-licensing
Available for L/O
Available for L/O
Available at candidate selection
Available at candidate selection
Available at candidate selection
Available at candidate selection
Available at candidate selection
Available at candidate selection
Available at candidate selection
Available at candidate selection
Available at candidate selection
Available at candidate selection
GBC Korea 2017 | LegoChem Biosciences, Inc | 45
LCB Collaborations
Over 10 ADC projects are underway in collaboration with partners with
antibodies or toxin/agents
Partner’s
Partner’s
GBC Korea 2017 | LegoChem Biosciences, Inc | 46
About LegoChemBio
Leader in novel drug development with top researchers, technology, system, and global experiences
Who we are?
• In Brief
- Founded in May 2006
- IPO in May 2013
- 106 employees (58 in R&D)
- Capital KRW 4.97bn
- CEO Yong-Zu Kim, PhD
- HQ in Daejeon
• Experience from discovery
stage through development
to US FDA approval
• Global out-licensing
experience
• “Emerging Company of the
year (Biospectrum)
• “K-Brain Power” (MOTIE)
What is Core Competence?
• LegoChemistry TM:
Chemical synthesis
technique
• ConjuAll TM: Next-
generation ADC
Technology
• Focused in
antibiotics,
anticoagulant,
oncology, ADC
How we do?
• Project selection
know-how
• Gate Decision
System
What we have?
• Development:
- 1 Phase II
- 2 Phase I
- 3 Preclinical
- 1 Commercialized
- ADC technology
• Business
- 7 Out-licensed
- 10 MTA /
Research Collaboration
Your success is only limited by
your creativity.
Dr. Jeiwook Chae, Chief Business Development Officer
Phone +82 (0)42 861 0688 Fax +82 (0)42 861 0689 Email [email protected]
Thank you.