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Updated: Oct 12, 2025
11:52
Analysis of LINE-1 Retrotransposition at the Single Nucleus Level
Published on: April 23, 2016
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Stochastic Effects in Retrotransposon Dynamics Revealed by Modeling under Competition for Cellular Resources
Sergey Pavlov1, Vitaly V Gursky2, Maria Samsonova1
1Mathematical Biology & Bioinformatics Laboratory, Peter the Great Saint Petersburg Polytechnic University, Saint Petersburg 195251, Russia.
Life (Basel, Switzerland)
|November 27, 2021
Summary
Competition for cellular resources like ribosomes and ATP affects transposon numbers. Stochastic effects cause cell populations to split, influencing LINE1 and Alu element dynamics and potentially indicating cell state.
Area of Science:
- Genomics
- Computational Biology
- Molecular Evolution
Background:
- Transposons, including LINE1 and Alu elements, are mobile genetic elements crucial for genome evolution and implicated in diseases.
- Their replication dynamics are influenced by cellular resource availability, especially under stress conditions like malignant transformation.
- Interactions between autonomous (LINE1) and nonautonomous (Alu) retrotransposons can lead to genomic instability.
Purpose of the Study:
- To model the dynamics of LINE1 and Alu retrotransposon replication under resource competition.
- To investigate the impact of limited cellular resources (ribosomes, ATP) on transposon proliferation.
- To explore the potential of transposon dynamics as biomarkers for cell state assessment.
Main Methods:
- Development of a simple mathematical model for retrotransposon dynamics.
- Simulation of transposon replication competition for cellular resources.
- Stochastic simulation of transposon dynamics in a cell population.
Main Results:
- Increased resource competition generally decreases active LINE1 and Alu element replication.
- Stochastic effects lead to population heterogeneity, with distinct pools of transposon behavior.
- Resource competition can result in early Alu extinction, favoring LINE1 expansion in some cell pools.
- Critical resource levels amplify noise and predator-prey oscillations in transposon dynamics.
Conclusions:
- Resource competition significantly shapes retrotransposon dynamics, creating diverse outcomes within cell populations.
- Observed dynamical effects may serve as indicators of cellular stress or malignant transformation.
- Transposon activity modulation could be a target for therapeutic intervention.
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