Persistent Biological Deposit Tracking via Extrachromosomal Vectors
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Solution Overview
Problem
Current methods for tracking biological deposits from public repositories lack effectiveness in detecting unauthorized commercial use, as they either compromise genomic integrity or have short-lived labeling methods.
Innovation Solution
The use of persistent tags such as radioisotopes, dyes, nanoparticles, and DNA barcodes that do not affect the biological sample's properties, allowing for the tracking of cell lines and their products after withdrawal from a repository, with the ability to determine the age of the deposit and identify unauthorized use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If genomic labels are inserted using CRISPR/Cas9 to track cell lines, then tracking capability is improved, but genomic integrity is compromised due to insertion within coding regions of expressed therapeutics
Solution Approach 1:
The patent extracts the tracking function from the genomic DNA by using extrachromosomal maintenance vectors that exist separately from the cell genome. These vectors can be maintained independently and provide tracking capability without integrating into or disrupting the cell's coding regions, thus preserving genomic integrity while achieving tracking.
Solution Approach 2:
The patent introduces an intermediary tracking system using maintenance vectors that mediate between the need for tracking and the requirement to preserve genomic integrity. These vectors serve as a bridge, providing tracking functionality through separate genetic elements that do not interfere with endogenous genes or therapeutic expression.
2Loss of information
If detectable iron oxide particles are used to label cells, then tracking is enabled, but the labeling is short-lived as cells lose the majority of iron oxide during the first few rounds of cell passage
Solution Approach 1:
The patent applies preliminary action by incorporating tracking markers into the genetic material of the cell line before depositing it in the repository. This ensures that the tracking capability is established in advance and will be maintained through cell division and passage, rather than relying on labels that are lost during initial passages.
Solution Approach 2:
The patent ensures continuity of tracking by using genetically encoded or extrachromosomally maintained tracking elements that are replicated and maintained continuously through cell division. This provides persistent tracking capability across multiple passages, unlike iron oxide particles which are lost during the first few passages.
3Ease of operation
If public repositories do not track who accesses the repository, then ease of access is improved, but unauthorized commercial use cannot be detected
Solution Approach 1:
The patent implements self-service tracking where the deposited cell line itself carries the tracking information through its genetic composition. The tracking capability is embedded in the biological material, allowing automatic identification and verification of the cell line's origin and usage without requiring external tracking infrastructure or access monitoring at the repository level.
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
Enables reliable tracking and verification of biological deposits and their products, preventing unauthorized commercial use by maintaining genomic integrity and providing a durable method for identification.
Implementation Method 1
the use of persistent tags such as radioisotopes
Data Source
AI summary
Methods and systems are provided herein to track an original biological deposit that is withdrawn from a public repository. In some aspects, the public repository may include the ATCC or any other public repository in which biological materials are deposited for access by the general public. These techniques may be used to identify a product or biological deposit from a third party that is derived from the original biological deposit.