Structure-guided disulfide engineering restricts antibody conformation to elicit TNFR agonism
A promising strategy in cancer immunotherapy is activation of immune signalling pathways through antibodies that target co-stimulatory receptors. hIgG2, one of four human antibody isotypes, is known to deliver strong agonistic activity, and modification of hIgG2 hinge disulfides can influence immune-stimulating activity. This was shown for antibodies directed against the hCD40 receptor, where cysteine-to-serine exchange mutations caused changes in antibody conformational flexibility. Here we demonstrate that the principles of increasing agonism by restricting antibody conformation through disulfide modification can be translated to the co-stimulatory receptor h4-1BB, another member of the tumour necrosis factor receptor superfamily. Furthermore, we explore structure-guided design of the anti-hCD40 antibody ChiLob7/4 and show that engineering additional disulfides between opposing F(ab') arms can elicit conformational restriction, concomitant with enhanced agonism. These results support a mode where subtle increases in rigidity can deliver significant improvements in immunostimulatory activity, thus providing a strategy for the rational design of more powerful antibody therapeutics.
Authors
- Christine A. Penfold (ORCID: https://orcid.org/0000-0001-8332-0592)
- Christian M. Orr (ORCID: https://orcid.org/0000-0002-6137-8969)
- Julie Herniman (ORCID: https://orcid.org/0000-0003-4834-1093)
- Ivo Tews (ORCID: https://orcid.org/0000-0002-4704-1139)
- H.T. Claude Chan (ORCID: https://orcid.org/0000-0003-0530-9480)
- Tatyana Inzhelevskaya (ORCID: https://orcid.org/0000-0003-1976-9533)
- Hayden Fisher (ORCID: https://orcid.org/0000-0003-0093-0921)
- Jonathan W. Essex (ORCID: https://orcid.org/0000-0003-2639-2746)
- Isabel G Elliott (ORCID: https://orcid.org/0000-0003-4535-5932)
- Mark Steven Cragg (ORCID: https://orcid.org/0000-0003-2077-089X)
- Kri T. J. Müller (ORCID: https://orcid.org/0000-0001-5674-6125)
- Patrick J. Duriez (ORCID: https://orcid.org/0000-0003-1814-2552)
- C. Ian Mockridge
Institutions
- Southampton General Hospital (GB)
- European Synchrotron Radiation Facility (FR)
- Diamond Light Source (GB)
- University of Southampton (GB)
Publication Details
- Journal
- Nature Communications
- Published
- 2025-04-12
- DOI
- https://doi.org/10.1038/s41467-025-58773-8
- Citations
- 1
- Primary Topic
- Monoclonal and Polyclonal Antibodies Research
- Type
- article
- Field-Weighted Citation Impact
- 1.36
Funders
- Wellcome Trust
- Diamond Light Source
- Cancer Research UK
- University of Southampton
- European Synchrotron Radiation Facility
- Directorate for Biological Sciences
- Engineering and Physical Sciences Research Council
- Biotechnology and Biological Sciences Research Council