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(Unwanted) Immunogenicity

Immunogenicity Bertin Pharma

Bertin Pharma has more than two decades of experience in Immunogenicity, both in the direction to reveal a pharmacological efficacy and in the deleterious direction i.e. neutralization of the biological activity of a biologics such as therapeutical proteins better known under the term "Anti-Drug Antibody (ADA).

Our Know-How & Technologies aim to answer to the following questions...

  • what is the pharmacokinetic (PK) of a therapeutic protein?
  • are there host antibodies and the emergence of ADA against a therapeutic protein?
  • and if yes, do they modify its concentration and/or PK and/or PD?
  • what are the characteristics & concentrations of such antibodies?
  • do they neutralise drug efficacy?
  • do they cause side-effects such as allergic or anaphylactic reactions and/or autoimmune diseases?

Our expertise permits to undertake...

  • implementation of preclinical studies in the most relevant animal species (in-house or in collaboration with our partner, CERB)
  • set-up and development of specific assays in various species & biological media
  • validation studies according to ICH & EMEA guidelines and FDA note for guidance
  • experiments in GLP conditions

For this & for example, we use...

  • a patented AChE revelation technology with several advantages over other enzymes conventionally used in EIAs i.e. kinetics superiority, low background, versatility, high sensibility & precision
  • our platform dedicated to production of monoclonal & polyclonal antibodies
  • specific standard & original EIA formats
  • titration of positive samples, immunodepletion or competition assays as well as immunoblots & Surface Plasmon Resonance (SPR) assays used as confirmatory assays
  • various specific binding-, enzyme- & cell-based assays

In vitro & in vivo Predictive Immunogenicity Assays

  • in vitro: Biotherapeutic candidates or peptides corresponding to previously identified epitopes are tested in vitro using a T cell proliferation assay using peripheral blood mononuclear cells (PBMC) isolated from different blood donors (between 20 and 50) with various HLA. Then, in a second step, we can assess the processing of these biotherapeutic candidates as antigen by dendritic cells using DC-T cell coculture assays. Dendritic cells are obtained by diffentiation of human monocytes previously isolated by CD14+ cell sorting in a PBMC population.

  • in vivo: Immunogenicity is explored using mice humanized for the immune system using human CD34+ hematopoietic progenitor cells (In collaboration with Axenis).

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78180 Montigny le Bretonneux - France
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