ADCs (Antibody-Drug Conjugates)

Quality Assistance adds value to your ADCs development. Thanks to our combined experience with cytotoxic small molecules and monoclonal antibodies, we can provide full analytical support for your projects. We offer a wide range of services for all payload categories (maytansine derivatives, auristatins, etc.) and all conjugation strategies (lysine, cysteine, site-specific).

Your analytical partner providing:

  • customised solutions in terms of analytical protocols and innovative technologies throughout non-clinical and clinical development.

  • a full range of equipment in Chromatography, Mass Spectrometry, Biochemistry, Cell Biology, Pharmaceutical Technologies and Microbiology, to meet all the challenges of developing and validating methods.

  • regulatory, scientific and technical excellence with a problem-solving approach

  • compliance with all applicable EMA, FDA and ICH regulations

  • GMP, GLP, GCLP/GCP environment

Your one-stop shop for analytical services

Outsource your analytical needs on one site for more efficiency including:

  • Analytical development
  • Validation of analytical methods as per ICH guidelines
  • Characterisation of ADCs at intact, sub-unit and peptide levels
  • Bioassays
  • Bioanalysis
  • Stability studies
  • Batch testing
Characterisation FACS / ICC (Immunocytochemistry)
Microbiology Bioburden / Sterility (filtration, direct inoculation) / Mycoplasma (QPCR)
Plasmid copy number Q-PCR
pH / Osmolarity (if liquid)  
Water content / residual moisture (if lyophilised) KF / Coulometer
Particulate matter Optical microscopy / Light obscuration / Imaging Particle Analysis
Properties after reconstitution  
Zeta potential  
Intact protein molecular weight Mass spectrometry (ESI-QTOF, MALDI-TOF, ESI-IonTrap) / SDS-PAGE / Bioanalyzer
Isoforms Mass spectrometry (ESI-QTOF, MALDI-TOF, ESI-IonTrap) / IEF / (i)cIEF / (U)HPLC (IEX, RP, SEC, HIC) /
2-D gel / Peptide mapping
Peptide mapping UPLC (UV, QTOF, IonTrap) / MALDI-TOF
Immunological identification ELISA / ECL (MSD) / Luminex / Western blotting / RID / Biacore
Identification of linked cytotoxic payload UPLC (UV/MS)
N- and C-terminal sequencing ESI-IonTrap (ETD) / MALDI-TOF (ISD) / Peptide mapping
Protein quantity BCA / Lowry / Bradford / UV / (U)HPLC (UV)
Absolute protein content determination Amino Acid Analysis (AAA) by UPLC (UV or Fluo, ACCQ-TAG Ultra) / ICP/MS (S, isotope dilution)
Determination of extinction coefficient UV + ICP/MS (S, isotope dilution) or AAA (UPLC-UV or Fluo)
Drug Antibody Ratio (DAR) UV/visible / HIC / Mass spectrometry (ESI-QTOF) / SEC-HPLC (UV/RI/MALS) / A4F (UV/RI/MALS) / icIEF / (U)HPLC (UV)
Detection of free cytotoxic compound (2D)(U)HPLC (UV/MS)
Mass distribution profile Mass spectrometry (ESI-QTOF)
Structural integrity Circular Dichroism (CD)
Isoforms IEF / (i)cIEF / (U)HPLC (IEX, RP, SEC, HIC) / 2-D gel / Peptide mapping / Mass Spectrometry
Aggregation, fragment and particle size distribution SEC-(U)HPLC (UV, RI, MALS) / A4F/HF5 (UV, RI, MALS) / CE / DLS / (SDS-)PAGE / Bioanalyzer /
Imaging Particle Analysis
Glycosylation patterns UPLC (FLUO, QTOF, IonTrap) / MALDI-TOF / CE (LIF) 
Disulfide bridges SDS-PAGE / Peptide mapping / Bioanalyzer
Free thiols Fluorescence (NPM) / UV (Ellman, DTNB)
Degradation patterns (oxidation, deamidation, Lys-term truncation, etc.) IEX / RP-(U)HPLC / SEC-(U)HPLC / (SDS-)PAGE / (U)HPLC (MS) / CE (icIEF, CE-SDS) / Bioanalyzer / 2D-Gel
Immunoassays / Cytotoxicity ELISA / ECL (MSD) / Luminex / Cell-based assays / FACS / Biacore
Residual solvents HS-GC (FID, MS, ECD)
Residual proteins (including HCP, protein A, purification Ab) ELISA / ECL (MSD) / Luminex / UPLC (MS/MS) / Western blotting / 2D-Gel / 2D-DIGE
Buffer components (including BSA, Tween, β-OG, Antibiotics) ELISA / ECL (MSD) / Luminex / Colorimetry / (U)HPLC (UV, MS, RI, ELSD, CAD)
Antifoam agents (PPG, PEG, silicone oil) ICP (MS, OES) / (U)HPLC (ELSD, CAD)
Residual DNA Q-PCR / PicoGreen / Threshold (to be discussed)
Elemental impurities ICP(OES, MS)
Microbiology Bioburden / Sterility (filtration, direct inoculation)
Endotoxins LAL (kinetic, end point)
Leachables  GC (FID, ECD, MS) / ICP (OES, MS) / (U)HPLC (UV, ELSD, CAD)
Container Closure System Integrity Bubbling / Dye ingress / Microbial ingress
Cytotoxicity / Biological reactivity Cell-based assays / USP <87>
Drug / Metabolites ELISA / ECL (MSD) / Luminex / UPLC (MS/MS) / ICP (OES, MS) / ESI-QTOF
Biomarkers ELISA / ECL (MSD) / Luminex / UPLC (MS/MS)
Vehicles / Buffers ELISA / ECL (MSD) / Luminex / (U)HPLC (UV, RI, DAD, FLUO, ELSD, CAD, MS) / ICP (OES, MS)
Immunogenicity ELISA / ECL (MSD) / Luminex / Cell-based assays (neutralization) / Biacore
Download the product sheet for more information