Apoptosis Inducing RNAi Positive Control for Transfection Assessment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current RNAi experiments require time-consuming and labor-intensive methods for assessing gene silencing efficiency, and existing positive controls are not always reliable or efficient in inducing a phenotypically detectable apoptotic phenotype across various cell lines, making it challenging to normalize gene silencing effects in high-throughput screening assays.
Innovation Solution
A combination of RNAi inducing compounds targeting Plk1 and ubiquitin genes is used to efficiently induce apoptosis in transfected cells, providing a reliable and convenient phenotypic positive control for RNAi experiments, which can be detected using standard laboratory equipment like a microscope within 48-72 hours.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional positive controls are used in RNAi experiments, then the assessment of gene silencing efficiency can be performed, but the process becomes time-consuming and labor-intensive
Solution Approach 1:
The patent employs luminescence (a form of light emission) as a readout mechanism to indicate gene silencing efficiency. The control system uses luminescent reporters that emit light when gene expression is suppressed, allowing rapid visual or instrumental detection without time-consuming manual assessments
Solution Approach 2:
The positive control system is designed to automatically indicate its functionality through luminescence signals. The system self-assesses by comparing luminescence levels between control and experimental wells, eliminating the need for labor-intensive manual evaluation and providing automated quality control
2Reliability
If existing positive controls are used to induce apoptotic phenotype, then transfection efficiency can be monitored, but the controls are not reliable across various cell lines
Solution Approach 1:
The patent creates a universal positive control system using luminescent reporters that function consistently across multiple cell lines. The control constructs are designed to work with various transfection methods and cell types, providing reliable apoptotic phenotype induction and luminescence readout regardless of the specific cell line being studied
Solution Approach 2:
The patent introduces luminescent reporter genes as intermediary markers that mediate the connection between gene silencing events and detectable phenotypic changes. These reporters act as reliable intermediaries that convert molecular-level gene suppression into measurable luminescence signals, ensuring consistent and reliable assessment across different experimental conditions and cell lines
3Measurement precision
If detailed molecular biology methods are used to assess gene silencing, then accurate data can be obtained, but the process becomes elaborate and time-consuming
Solution Approach 1:
The patent replaces complex mechanical and manual molecular biology procedures with a luminescence-based detection system. Instead of requiring elaborate protocols for RNA extraction, gel electrophoresis, or Western blotting, the system uses luminescent reporters that provide accurate gene silencing measurements through simple luminescence assays, dramatically increasing experimental throughput while maintaining precision
Solution Approach 2:
The patent changes the measurement parameter from complex molecular analyses to luminescence intensity. By monitoring luminescence signals rather than performing detailed molecular characterizations, the system maintains accurate assessment of gene silencing effects while reducing experimental complexity and time requirements, enabling high-throughput screening
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 combination of siRNAs targeting Plk1 and ubiquitin genes induces a clear apoptotic phenotype, allowing for quick and efficient assessment of transfection efficiency and gene silencing effects, enhancing the reliability and speed of RNAi experiment analysis.
Implementation Method 1
RNA interference (RNAi) which is a mechanism for RNA guided regulation of gene expression in which double-stranded ribonucleic acid molecules inhibit the expression of genes with complementary nucleotide sequences
Implementation Method 2
The RNAi pathway is initiated by the enzyme dicer, which cleaves double-stranded RNA (dsRNA) to short double-stranded fragments of usually approximately 20 to 25 base-pairs
Implementation Method 3
the guide strand base-pairs with complementary sequences. The most well-studied outcome of this recognition event is a form of post-transcriptional gene silencing. This occurs when the guide strand base-pairs with the messenger RNA (mRNA) molecule and induces degradation of the mRNA by argonaut
Implementation Method 4
Antisense polynucleotides are designed to specifically bind to RNA, resulting in the formation of RNA-DNA or RNA-RNA hybrids, with an arrest of reverse transcription or messenger RNA translation
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The invention pertains to the use of an apoptosis inducing combination of at least a. a first expression modulating compound silencing the expression of at least a first target gene involved in apoptosis and b. a second expression modulating compound silencing the expression of at least a second target gene involved in apoptosis as a positive control in expression modulating assays. Also provided are suitable methods, kits and compositions.