Unlock the potential of your therapeutic antibody development with ProteoGenix. With over 25 years of experience and 30+ antibodies in clinical trials, we lead the field in therapeutic antibody discovery services. Benefit from exclusive rights to all developed antibodies, supported by our advanced XtenCHO™ cell line and milestone-driven strategy. Trust our highly skilled experts to guide you through the complexities of antibody discovery and development with confidence. Contact us today to discuss your project and see how our services can drive your success.

Discover the first Human Cancer Phage Display Library

  • Huge diversity: 3.81×1010 (scFv) 3.72×1010(Fab)
  • 48 human donors with 7 different cancers: prostate, colorectal, renal,
    lung, skin, melanoma, acute myeloid leukemia
  • Ideal for Human Cancer Therapeutic Antibody Development

Comprehensive Therapeutic Antibody Development Process: From Target Selection to Clinical Candidate

Navigating the complex journey of therapeutic antibody development can be challenging. Choosing ProteoGenix as your single partner from target selection to the clinic ensures a seamless and efficient process, backed by our extensive expertise and advanced technologies. By partnering with us throughout the entire development process, we can adapt strategies early on, aligning them with your final objectives to enhance developability and advance compounds to clinical stages efficiently. This integrated approach offers streamlined communication, better process control, and faster time to market, while leveraging our 25 years of experience and innovative technologies to maximize success rates. Our proven process includes precise target discovery, promising lead identification, advanced antibody engineering, and high-yield bioproduction using techniques like phage display, single B cell isolation, and our XtenCHO™ cell lines. Trust ProteoGenix to guide your project from start to finish, ensuring optimal outcomes and the success of your therapeutic antibodies.

Proven Success in Therapeutic Antibody Development: Case Studies

Protein-Neutralizing mAbs Development via Phage Display with Human scFv Library

 

Problem

A client required monoclonal antibodies (mAbs) targeting a specific recombinant protein (referred to as protein X), ensuring the antibodies do not cross-react with naturally occurring ligands PROT-A and PROT-B.

What Did We Do?

We employed phage display technology using a highly diverse human naïve scFv library (5.37×10¹⁰ different clones). The key steps included:

  • Antigen Preparation: Coating tubes with protein X.
  • Biopanning: Conducted six rounds to enrich specific binders.
  • Screening: Utilized ELISA to screen phages for binding specificity against protein X and its subdomains (SD1, SD2, SD3).

Experimental Content

  • Biopanning Rounds:
    • Conducted multiple rounds with varying antigen concentrations and wash steps.
    • Enrichment was noted particularly after round 4.
  • Determination of Eluted Phages:
    • Calculated phage concentrations post-elution by plating on E. coli TG1.
  • Polyclonal Phage ELISA:
    • Assessed binding of phage pools from each biopanning round.
  • Monoclonal Phage ELISA:
    • Individual phage clones were further screened for binding specificity.

 

Table 1: Panning Results
Table 2: Polyclonal phage ELISA results
Table 3: Results of monoclonal phage confirmation ELISA against antigen and the subdomains of R5P1-E2, R4P1-B2 and R3P1-H4

Results

  • Biopanning: Significant enrichment observed post round 4 (golden).
  • Polyclonal Phage ELISA: Increased binding specificity over successive rounds.
  • Monoclonal Phage ELISA: Identified 19 unique sequences, with three key binders (R5-P1-E2, R4-P1-B2, R3-P1-H4) demonstrating specific binding to protein X and its subdomains.

Conclusion

 The project successfully identified three mAbs with high specificity for protein X, suitable for further development and applications. The specific clones R5-P1-E2, R4-P1-B2, and R3-P1-H4 were validated as effective in blocking binding in the presence of PROT-A and PROT-B, thus meeting the client’s requirements.

Client Success Stories: Real Results in Therapeutic Antibody Development

“I requested ProteoGenix’s services for the generation of neutralizing anti-COVID-19 antibodies by Phage Display. They designed an optimised strategy for this purpose which led to great results, with 4 antibodies identified as cross-reactive and neutralizing against all the current variants of concerns. During the whole project, Proteogenix strived to ensure the best quality of their final deliverables, especially by including additional screenings against emerging variants as the pandemic evolved. Their proactivity was key to obtaining promising and relevant blocking antibodies in only a few months. I highly recommend them for both their level of expertise and the personalised service they offer.”

“We are developing a novel immunotherapy and needed a highly potent monoclonal antibody. Currently the development of a novel antibody requires lengthy and expensive humanization process. We thus decided to screen for binders a human antibody library via phage display screening instead of humanizing a murine antibody. Proteogenix proposed just that. We provided our purified target antigen and in only one month several high affinity binders were obtained. We were able to quickly clone and produce a monoclonal antibody from the sequences provided. What should have taken 6 to 8 months was done in 2 for a fraction of the cost and for an equivalent quality.”

FAQ for Therapeutic Antibody Development Services