Upstream process development for mammalian & insect cells

GTP's scientists develop upstream processes that fit the needs of your recombinant protein project. Our upstream development services include mammalian and insect cell development. With over 300 such projects handled to date, GTP has extensive experience in cell culture with a variety of mammalian or insect expression systems.

High-quality mammalian and insect process development services for GMP-ready upstream processes

Customised insect & mammalian expression strategies to fit your need

When your requirement is milligrams of material for research or POC studies, we select expression platforms that allow for short turnaround times and high expression levels. For expression in mammalian cells, we rely on our efficient transient transfection platform, using both CHO and HEK cells.

For projects in later development stages, we provide USP development services for both mammalian and insect cells. Our experts define optimal culture parameters for the desired titer, determine quality attributes and ensure process robustness and scalability. Our services include fast-track process development when timelines need to be condensed. GTP offers the flexibility your project needs and the ability to quickly adapt to process change requirements, which are a commun occurrence in bioprocess development.

GMP-ready upstream processes

We offer a comprehensive set of process development services to deliver GMP-ready upstream processes:

  • Cell line development.
  • Cell line adaptation (e.g. to serum-free or suspension culture).
  • Generation of cell banks (RCB & MCB).
  • Media & feed development and optimisation
  • Development of batch, fed-batch or perfusion processes.
  • Identification of critical process parameters.
  • Optimisation of existing processes.
  • Support for transfer to manufacturing.

Cell line development is performed through partnerships with technology companies. Depending on your requirements and constraints, we select IP-free or proprietary technologies to develop high-expressing cell lines.

To develop the best upstream process for your project, we first study cellular behaviour in different growth conditions to select the clones with the most appropriate growth characteristics. We then focus on developing and optimizing culture conditions with media and feeding strategies. The process will be transferred to a bioreactor to define the settings and process range and perform consistency runs for process confirmation.

State-of-the art equipment to fit your project

Our cell culture facilities include high-quality equipment for every development stage, from small to pilot scale:

  • Screening experiments: spinner, shake flasks, roller bottles.
  • Process development bioreactors: 3 to 10L.
  • Pilot bioreactors: 10L to 100L.
Mammalian cells development 1 Mammalian cells development 2