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Cryptic transcription in aging
Di Wu1,2,3,4, Binh P Nguyen5, Elena Zholdybayeva6
1School of Clinical Medicine, Shandong Second Medical University, Weifang, Shandong 261000, P.R. China.
Iscience
|August 7, 2026
Summary
Aging causes cryptic transcription, aberrant gene expression from incorrect DNA sites, by altering chromatin marks like H3K36me3. This impairs stem cells and contributes to aging and disease.
Area of Science:
- Molecular Biology
- Epigenetics
- Aging Research
Background:
- Cryptic transcription initiates from non-promoter gene regions, normally suppressed by repressive chromatin.
- Aging disrupts this repression, leading to aberrant transcription and RNA products.
Purpose of the Study:
- To review mechanisms of age-related cryptic transcription.
- To discuss the impact of cryptic transcription on aging stem cells and tissues.
Main Methods:
- Focus on histone modifications (H3K36me3, H3K4me3, H3K27ac).
- Examines DNA methylation changes.
- Considers the role of transcription factors.
Main Results:
- Loss of H3K36me3 and DNA methylation in aging promotes cryptic transcription.
- Accumulation of promoter-like histone modifications in gene bodies facilitates spurious initiation.
- Aberrant RNAs and proteins interfere with stem cell function.
Conclusions:
- Age-related epigenetic changes drive cryptic transcription.
- This aberrant process contributes to stem cell dysfunction and aging phenotypes.
- Understanding these mechanisms is crucial for addressing age-related diseases.
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