Boosting peptide half-life: enabling efficient generation of Fc-peptide conjugates

Area of Science:

• Bioconjugation Chemistry
• Protein Engineering
• Pharmacology

Background:

• Therapeutic peptides offer unique targeting capabilities for 'undruggable' targets.
• Short plasma half-life limits the therapeutic application of many peptides.
• Current recombinant methods for Fc-peptide fusion restrict the inclusion of non-proteinogenic modifications.

Purpose of the Study:

• To develop a novel semi-synthetic strategy for generating Fc-peptide conjugates.
• To enable the incorporation of non-proteinogenic features into Fc-peptide constructs.
• To create Fc-peptide conjugates with improved stability and biological activity.

Main Methods:

• Design, synthesis, and bioconjugation of functionalized disulfide re-bridging linkers.
• Semi-synthetic approach for Fc-peptide conjugate generation.
• In vitro and in vivo evaluation of the generated conjugate.

Main Results:

• Successful generation of an Fc-peptide conjugate using the semi-synthetic strategy.
• Demonstrated retained biological activity of the conjugate in vitro.
• Observed prolonged circulation time of the conjugate in vivo.
• The methodology allows for simple and efficient generation of Fc-peptide conjugates.

Conclusions:

• A versatile semi-synthetic strategy for Fc-peptide conjugate generation has been established.
• This method overcomes limitations of recombinant approaches by allowing non-proteinogenic modifications.
• The developed conjugates exhibit enhanced pharmacokinetic properties and retained biological activity, expanding therapeutic possibilities.