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Retrotransposons Down- and Up-Regulation in Aging Somatic Tissues
Giorgia Giordani1, Valeria Cavaliere1, Giuseppe Gargiulo1
1Dipartimento di Farmacia e Biotecnologie, Alma Mater Studiorum Università di Bologna, 40126 Bologna, Italy.
Cells
|January 11, 2022
Summary
Transposable elements (TEs) show dynamic expression changes in aging fruit flies, with reduced activity in middle age and reactivation in older individuals. This suggests complex regulation of TEs throughout the lifespan.
Area of Science:
- Genetics
- Aging Research
- Molecular Biology
Background:
- The transposon theory of aging proposes that age-related transposable element (TE) activation in somatic tissues shortens lifespan.
- TE activation is linked to increased DNA double-strand breaks, genome instability, and inflammation.
Purpose of the Study:
- To investigate age-dependent changes in TE regulation within somatic tissues.
- To analyze the expression of specific TEs and their silencing small RNA source, the 'flamenco' cluster, in Drosophila.
Main Methods:
- Analysis of transposable element expression levels during aging in Drosophila.
- Examination of the 'flamenco' small RNA cluster, a key TE silencer.
Main Results:
- Significant variations in the expression of analyzed TEs were observed across different age groups.
- A trend of reduced TE expression in middle-aged adults followed by reactivation in older individuals was identified.
- Dynamic regulation of TE expression throughout the lifespan was suggested by these findings.
Conclusions:
- TE expression is dynamically regulated during the aging process in Drosophila somatic tissues.
- Observed variations in TE expression may contribute to age-related cellular changes.
- Further research is warranted to elucidate the precise mechanisms and implications of TE dynamics in aging.
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