ZEBRA-Derived Cell Penetrating Peptides for Cargo Delivery
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Solution Overview
Problem
Current cell penetrating peptides (CPPs) face challenges such as severe side effects, membrane disruption, rapid degradation, and limited ability to release cargo molecules efficiently, often restricted to specific internalization pathways, making them inefficient for delivering a wide variety of cargo molecules into cells with low toxicity.
Innovation Solution
Development of CPPs with amino acid sequences between 15 and 30 residues, derived from the minimal domain of the Epstein-Barr virus ZEBRA protein, allowing for efficient cellular uptake and presentation of antigenic determinants, and capable of delivering various cargo molecules, including peptides, proteins, polysaccharides, and nucleic acids, while minimizing toxicity and promoting broad spectrum release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional CPPs are used to deliver cargo molecules into cells, then cellular uptake efficiency is improved, but membrane disruption and cellular toxicity occur
Solution Approach 1:
The patent applies parameter changes by optimizing the amino acid composition and sequence of CPPs. Specifically, it identifies and utilizes the ZEBRA peptide sequence (amino acids 170-220) with its specific ratio of positive charges and hydrophobic residues, which enables efficient cellular uptake while minimizing membrane disruption and cytotoxicity compared to conventional CPPs
Solution Approach 2:
The patent employs composite materials by designing chimeric CPPs that combine the ZEBRA transduction domain with cargo molecules of various types (proteins, peptides, polysaccharides, nucleic acids). This composite structure allows the ZEBRA-based CPP to function as a delivery vehicle that maintains low toxicity while effectively transporting diverse cargo into cells
2Reliability
If existing CPPs are used for cargo delivery, then translocation across membranes is achieved, but rapid degradation in cytoplasm occurs
Solution Approach 1:
The patent applies parameter changes by modifying the chemical structure of CPPs through the ZEBRA sequence, which has specific physicochemical properties (amphipathic character, charge distribution) that protect the cargo from rapid degradation in the cytoplasm while maintaining membrane translocation capability
3Reliability
If conventional CPPs are used for cargo delivery, then cellular internalization is achieved, but cargo release efficiency is limited
Solution Approach 1:
The patent applies dynamics by designing CPPs with inducible cargo release capability. The ZEBRA-based CPP system enables dynamic control where cargo is released in response to specific cellular conditions or stimuli, allowing the peptide to first facilitate internalization and then subsequently release the cargo efficiently at the appropriate location and time within the cell
4Productivity
If specific CPP sequences are used, then efficient delivery to one pathway is achieved, but broad spectrum delivery capability is limited
Solution Approach 1:
The patent applies universality by designing the ZEBRA-based CPP to perform multiple functions: it can deliver diverse cargo molecules (proteins, peptides, polysaccharides, nucleic acids) through multiple cellular pathways simultaneously. The amphipathic nature and specific charge distribution of the ZEBRA sequence enable it to interact with different membrane types and deliver cargo to various cellular compartments including cytosol, endosomes, and other organelles
Data Source
Figure 1A~1D
Figure 1E~1F
Figure 2A~2C
AI summary
The present invention relates to a short cell penetrating peptide derived from ZEBRA, optionally linked to a cargo molecule. It also relates to a complex comprising said cell penetrating peptide and a cargo molecule, as well as cells loaded with said complex and the use thereof in therapy and diagnosis.