Bicyclic peptide-based CPPTACs for extracellular and cell membrane protein degradation.

Area of Science:

• Biochemistry
• Molecular Biology
• Drug Discovery

Background:

• Extracellular and cell membrane proteins are vital for physiological balance.
• Aberrant expression of these proteins is linked to various diseases.
• Targeted degradation of these proteins presents a significant therapeutic avenue.

Purpose of the Study:

• To develop novel bicyclic peptide-based lysosome-targeting chimeras (CPPTACs).
• To selectively degrade extracellular and cell surface proteins using CPPTACs.
• To leverage cell-penetrating peptide (CPP)-induced endocytosis and lysosomal delivery.

Main Methods:

• Conjugation of a bicyclic CPP with the KRK motif to target protein-binding molecules.
• Utilizing CPPTACs to induce endocytosis and lysosomal delivery.
• Assessing cellular uptake and protein degradation efficacy.

Main Results:

• Bicyclic peptide-based CPPTACs demonstrated enhanced cellular uptake.
• CPPTACs facilitated rapid degradation of target proteins via the endo-lysosomal pathway.
• Successful selective degradation of extracellular and cell surface proteins was achieved.

Conclusions:

• Bicyclic peptide-based CPPTACs are effective tools for targeted protein degradation.
• This strategy enhances cellular uptake and lysosomal delivery for protein elimination.
• CPPTACs hold potential for advancing pharmaceutical drug discovery and therapeutic development.