Mazzocchio DNA Nanostructure for High-Capacity Cargo Encapsulation
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Solution Overview
Problem
Current DNA nanostructures face challenges in encapsulating a wide range of molecules due to their limited size and complexity, leading to restricted cargo delivery and high production costs, which hinders their practical application in therapeutics and diagnostics.
Innovation Solution
The development of nucleic acid nanostructures in the form of a torus-like mazzocchio, composed of subunits connected by linkers, which can encapsulate cargo within a defined three-dimensional cavity, using a simplified synthesis process with fewer oligonucleotides, allowing for targeted and efficient delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If DNA origami approaches with hundreds of staple strands are used to create complex nanostructures, then the structural complexity and cargo encapsulation capability are improved, but the production cost and synthesis difficulty increase significantly
Solution Approach 1:
The patent divides the complex DNA nanostructure into modular repeating units (tiles) that can be assembled from a limited set of oligonucleotides. Instead of using hundreds of unique staple strands, the structure is segmented into identical or similar modular units that repeat throughout the nanostructure, dramatically reducing the number of unique oligonucleotide sequences required while maintaining structural complexity and cargo encapsulation capability.
Solution Approach 2:
The patent employs universal oligonucleotide sequences that serve multiple functions across different positions in the nanostructure. The same oligonucleotide sequences are reused in multiple tiles and positions, allowing a small library of universal building blocks to construct large complex structures. This multi-functionality reduces synthesis cost and complexity while maintaining the ability to encapsulate diverse cargos.
2Ease of manufacture
If smaller DNA nanostructures like DNA tetrahedrons are used, then the synthesis simplicity is improved, but the cargo delivery capacity and protection capability are limited
Solution Approach 1:
The patent implements a hierarchical nesting structure where multiple levels of organization are combined: individual DNA tiles are nested within repeating units, which are nested within larger nanostructure domains, which finally nest within the complete nanostructure. This nested architecture allows simple modular tiles to be assembled into progressively larger and more complex structures with increased cargo capacity, maintaining synthesis simplicity at each level while scaling up delivery capacity.
Solution Approach 2:
The patent transitions from two-dimensional DNA tiles to three-dimensional nanostructures by stacking and assembling tiles in multiple dimensions. This dimensional progression allows the structure to scale from simple planar arrangements to complex volumetric architectures with internal cavities and compartments, dramatically increasing cargo delivery capacity while maintaining the simplicity of tile-based assembly through hierarchical organization.
3Productivity
If conventional DNA nanostructures are used for cargo delivery, then the production cost increases, but the stability and biocompatibility may be compromised
Solution Approach 1:
The patent optimizes key parameters including the ratio of oligonucleotides to scaffold strands, the length and sequence composition of staple strands, and the assembly temperature profiles. By carefully controlling these parameters, the patent achieves stable nanostructure formation with improved biocompatibility while reducing the total number of oligonucleotides required, thereby lowering production costs without compromising reliability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The mazzocchio nanostructures provide cost-effective, stable, and biocompatible delivery of various cargos, including drugs and imaging agents, with optimal size for cellular penetration, enhancing therapeutic and diagnostic applications.
Implementation Method 1
a temperature transition is applied to a mixture of scaffold strands, staple strands, and the linkers that make up the nanostructure, such that the strands and linkers anneal
Implementation Method 2
DNA nanotechnology uses the fundamental Watson-Crick base pairing principle in double-stranded DNA to fabricate various objects from DNA bricks to DNA origamis
Data Source
AI summary
Provided herein are compositions and methods involving nucleic acid nanostructures that can encapsulate cargo for use in, for example, therapeutic, diagnostic, and analytical applications. The nanostructures can have a plurality of interconnected subunits configured such that the nanostructures have a continuous torus-like structure with a closed three-dimensional cavity. Preferably, the nanostructure is a nucleic acid mazzocchio. The subunits are connected by linkers having defined lengths to constrain the nanostructure into the continuous torus-like shape. The closed three-dimensional cavity is of defined size to encapsulate any cargo of interest. Cargo can also be positioned in the open hole at the center of the nanostructure. The cargo can be a wide range of compounds including, for example, chemical drugs, small molecules, therapeutics, targeting agents, enzymes, dyes, and fluorescent molecules. As such, the disclosed nanostructures are suitable for delivery of one or more therapeutic, toxic, imaging, diagnostic, or prophylactic agents.