1 Protagen AG Protagen AG Otto-Hahn-Str. 15 44227 Dortmund +49-231-9742 6300 Successful Strategy for Systematic Identification of Novel Biomarkers Technologieforum Diagnostik – Frankfurt, 27./28. Nov. 2006 Dr. Jens Beator Director Protein Biochips [email protected]JB/26.11.2006 Slide: 2 Fact Sheet Corporation on stocks „Aktiengesellschaft“ Legal form: 34 Employees: - Bruker Daltonik GmbH, Bremen - Vivascience AG, Hannover - Serva Electrophoresis GmbH, Heidelberg Industrial partners: Otto-Hahn-Str. 15 44227 Dortmund Germany Location: Established: 1997 Protagen AG
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PRE Technologieforum 003 070118 JBE2007/Vortraege/Beator.pdf · Therapie und Studienzentrum für Multiple Sklerosis JB/26.11.2006 Slide: 18 Discovery of Putative Multiple Sclerosis
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1Protagen AG
Protagen AG
Otto-Hahn-Str. 15
44227 Dortmund
+49-231-9742 6300
Successful Strategy for Systematic Identification of Novel Biomarkers
Multiple Sclerosis, Alzheimer, breast cancer, prostate cancer, ….
What are the (auto)antigens?
Which autoantibody profiles are suitable biomarkers?
4Protagen AG
JB/26.11.2006 Slide: 7
hEx1 Protein Expression Library
• Derived from human fetal braintissue with largest diversity of expressed genes193.500 human protein expression clones with His-tagsbacterial clones grown on PVDF filtersinducible protein expression
• 37.200 protein expressing clonesreact with anti-His antibody
• 16 000 different gene products available for binding assays
2533 different clusters (multiple clones of same gene)
detected by antibodies in two or more of the five patient pools,
not recognized by serum from 11 controls.
AP
6Protagen AG
JB/26.11.2006 Slide: 11
1 21 and 2 show the results of two separate screens of the same
patient, screened separately on two arrays; > 80% reproducibility
MACROarray Reproducibility
Dilated Cardiomyopathy study, Horn et al. 2006
JB/26.11.2006 Slide: 12
� Using purified proteins printed on protein biochips
� 20 patient sera / 10 control sera from normal individuals
� 7 Disease control sera from patients with psoriasis, hand and foot
eczema or skin allergy
patient
sample 9
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control
sample 57
disease control
skin eczema
sample 5
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Diagnostic Protein Biochip: Alopecia areata
= Alopecia-associated proteins
Confirmation of MACROarray-identified antigens
7Protagen AG
JB/26.11.2006 Slide: 13
MACROarrays Used for Biomarker Discovery
• Systemic Lupus erythematodes (SLE mouse model)Gutjahr, C., ….. Cahill, DJ (2005) Mouse protein arrays from a TH1 cell cDNA library for antibody screening and serum profiling. Genomics 85, 285–296
• Alopecia areata (hair loss) Lüking A., …. Cahill, DJ (2005)
Profiling of alopecia areata autoantigens based on protein microarray technology. Mol. Cell Proteomics 4:1382–90
• Dilated Cardiomyopathy (DCM)Horn, S., …. Cahill, DJ (2006)Profiling humoral auto-immune repertoire of dilated cardiomyopathy (DCM) patients and development of a disease-associated protein chipProteomics 6: 605 - 613
JB/26.11.2006 Slide: 14
Protagen Patent Position
Patented UNIclone® platform technology
• Creation and use of protein expression libraries
• Use of recombinant products originating from expression
libraries in array formats
• Protagen has exclusive worldwide license
from Max-Planck-Society, Germany
Protagen’s patent position
• Unique and solid position for protein arrays
• Freedom-to-operate towards products &
cooperations in the Life Science industry
8Protagen AG
JB/26.11.2006 Slide: 15
A B C E F G HD
Capturing antibody
Detecting antibody
Secondary antibody
Label
Immobilized protein
Interacting protein Small compound
Protagen Protein Biochips
JB/26.11.2006 Slide: 16
Quantitative binding profiles of biotherapeutics
Antibody A Antibody B Receptor Fusion
Antigen Antigen Antigen
UNIchip® AV-400 UNIchip® AV-400 UNIchip® AV-400
Example: UNIchip® AV-400, Launch 2005
Patented design with antigen calibrator
9Protagen AG
JB/26.11.2006 Slide: 17
Antigen Discovery for Multiple Sclerosis
Systematic discovery of novel Multiple Sclerosis autoantigens
in a BMBF-supported project
• Identification of putative autoantigens using MACROarrays
• Screening patient cohorts using purified antigens on protein biochips
• Clinical partner:Dr. Sebastian SchimrigkNeurologische Klinik der Ruhr Universität Bochum, St. Josef HospitalArbeitsgruppe NeuroimmunologieTherapie und Studienzentrum für Multiple Sklerosis
JB/26.11.2006 Slide: 18
Discovery of Putative Multiple Sclerosis Antigens
MS patient serum on hEx1 MACROarray
10Protagen AG
JB/26.11.2006 Slide: 19
Development and production of protein biochips with
recombinant antigens for diagnostic multiplex assays, patented
• MACROarray processing
• Clone selection & identification
• High-throughput protein expression & purification