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PolyTherics has developed its range of novel ThioBridge™ linkers to efficiently conjugate drugs to antibodies to create less heterogeneous ADCs with better stability. Our proprietary technology uses site-specific conjugation to naturally occurring inter-chain disulfides avoiding the need for antibody re-engineering to create a site of attachment.
We offer a range of cytotoxic payloads with different mechanisms of action which we can conjugate to your antibody using our ThioBridge™ technology. These payloads have been developed internally or are accessed through our partnerships.
PolyTherics can undertake the conjugation and analytical characterisation of the ADC in its own laboratories or provide a ThioBridge™ precursor reagent to you to use in-house. In addition to producing ADCs for potential therapeutic use, we can also produce antibody-conjugates for diagnostic & imaging purposes and ADCs using standard conjugation technologies for comparative purposes.
Optimisation of pharmacokineticsPolyTherics provides a range of site-specific conjugation technologies to optimise the pharmacokinetics (PK) and pharmacodynamics (PD) of therapeutic peptides and proteins, including antibody fragments and other protein scaffolds, by extending their half-life to reduce the frequency of dosing. This improves patient compliance and can reduce the cost of treatment. PolyTherics also provides a low viscosity polymer, PolyPEG™, to enable the easier injection of conjugated proteins which need to be administered at high concentration.
Our proprietary PEGylation technologies enable polyethylene glycol (PEG) or other polymers to be attached to different specified sites depending on the nature of the protein. TheraPEG™ conjugates PEG at disulfide bonds, HiPEG™ conjugates PEG to poly-histidine motifs and CyPEG™ conjugates PEG to a thiol on a free cysteine. These technologies are used to conjugate both linear and branched PEG to therapeutic proteins and can be used for PolyPEG™ conjugation.
The conjugation processes are efficient, helping keep the cost of manufacture down, and the conjugated products are more stable and homogeneous than can be achieved with other well-established conjugation technologies.
We can PEGylate your protein or peptide in our laboratories or provide you with our conjugation reagents so you can undertake the work yourself. Our reagents are available in a range of PEG molecular weights and formats, including linear and branched PEGs.
Via Krishan Maggon
Humanized antibodies and deimmunised proteins are designed to be devoid of the T cell epitopes that lead to an adverse immune response while minimising the loss of antibody affinity or protein activity that can occur with standard protein engineering techniques.
Composite Human Antibodies™Antibody humanization technology is used to generate humanized and fully functional antibodies devoid of T cell epitopes in the variable region sequences to reduce immunogenicity in patients. Composite Proteins™
Protein deimmunisation technology is used to generate therapeutic proteins devoid of human T cell epitopes to minimise potential immunogenicity in patients without compromising protein activity