Target Mimic Design
Target Mimic Design - Related Videos
07:19
Identifying Targets of Human microRNAs with the LightSwitch Luciferase Assay System using 3'UTR-reporter Constructs and a microRNA Mimic in Adherent Cells
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Cited by 22 •
2011
MicroRNAs (miRNAs) are important regulators of gene expression and have been shown to play a role in numerous biological processes. To better understand miRNA-UTR interactions, we have created a genome-wide collection of 3 UTR luciferase reporters paired with a novel luciferase gene and assay reagent, the LightSwitch system.
12:42
Paramyxoviruses for Tumor-targeted Immunomodulation: Design and Evaluation Ex Vivo
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Cited by 17 •
2019
This protocol describes a detailed workflow for the generation and ex vivo characterization of oncolytic viruses for expression of immunomodulators, using measles viruses encoding bispecific T cell engagers as an example. Application and adaptation to other vector platforms and transgenes will accelerate the development of novel immunovirotherapeutics for clinical translation.
10:35
Production and Testing of Antimicrobial Peptides and Their Mimics
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2026
This protocol describes a method for producing and evaluating the antimicrobial activity and cytotoxicity of the cationic peptide Mel4 and peptide mimic RK758. By integrating chemical synthesis, recombinant expression, and standardized functional assays, it provides a streamlined workflow for the production and testing of peptides and small-molecule mimics.
02:53
Blood-Brain Barrier Mimic Permeability Assay: An In Vitro Assay to Assess the Permeability of BBB Mimic to Tracer Molecules
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2023
This video describes a permeability assay to evaluate the permeability of in vitro blood-brain barrier using sodium fluorescein molecules.
03:42
Evaluating Virus Spread Inhibition Through microRNA Mimic-Mediated Genome Silencing
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2026
Source: Ruiz, A. J. and Russell, S. J. MicroRNA-based Regulation of Picornavirus Tropism. J. Vis. Exp. (2017)This video demonstrates the use of synthetic microRNA mimics to inhibit viral replication in cultured epithelial-like cells selectively. It highlights how microRNA-directed genome silencing can block virus spread and confirm targeting specificity through downstream infectivity analysis.
FAQs
Target Mimic Design separates two outcomes that can occur at a recognition site: stable microRNA pairing and efficient cleavage. The complementary region supports microRNA association, while a central mismatch or bulge disrupts the arrangement required for normal target degradation. The decoy can therefore retain the regulatory small RNA and change its availability without simply eliminating the molecule.
A target mimic can sequester part of the available microRNA pool, leaving less regulatory small RNA to interact with endogenous transcripts. This changes post-transcriptional regulation across the relevant network rather than directly modifying every affected gene. Measuring transcript responses after this perturbation can help identify which environmental-response pathways depend on the targeted microRNA.
A normal target is recognized in a way that supports regulatory action and, in the overviewed context, target degradation. A designed mimic preserves complementary recognition but adds a central mismatch or bulge that limits efficient cleavage. This difference shifts the interaction toward decoy activity, allowing researchers to perturb microRNA regulation while examining the resulting biological response.
The relationship between the complementary recognition region and its central mismatch or bulge is critical. Sufficient complementarity supports microRNA binding, whereas the centrally positioned interruption is intended to prevent efficient cleavage. If that balance is not maintained, the molecule may fail to retain the regulatory small RNA or may behave more like a conventional degradable target.
A typical study begins by selecting a regulatory microRNA or related small RNA associated with the environmental response of interest. Researchers then design a complementary recognition site containing a central mismatch or bulge, use the resulting decoy RNA to perturb regulation, and compare molecular responses with appropriate untreated or contrasting conditions. The comparison reveals effects linked to altered microRNA availability.
Researchers can apply the mimic strategy under defined environmental conditions such as drought, salinity, or temperature stress and examine how the altered microRNA network changes plant responses. Comparing mimic-treated and contrasting samples helps connect specific regulatory small RNAs with stress-response pathways. This approach can clarify molecular mechanisms that contribute to adaptation under changing environmental conditions.
The approach can reveal whether a microRNA participates in responses to environmental pressures, including pollutants and physical stresses. Changes observed after selectively perturbing post-transcriptional regulation may identify affected stress-response pathways and their downstream molecular patterns. These findings provide context for understanding how regulatory networks influence adaptation and ecological resilience, rather than only describing individual transcript changes.