ArticleInsect molecular biology2024
The diapausing mosquito Culex pipiens exhibits reduced levels of H3K27me2 in the fat body.
Article in Insect molecular biology, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
4 citing papers in PubMed, 8 citations in OpenAlex.
- Article
- The PBAP chromatin remodeling complex mediates summer diapause via H3K4me3-driven juvenile hormone regulation inProceedings of the National Academy of Sciences of the United States of America · 2025Article
- Suppression of the H3K27me3 demethylase disrupts diapause formation in mosquito Culex pipiens.Insect biochemistry and molecular biology · 2025Article
- Transcription profiling reveals tissue-specific metabolic pathways in the fat body and ovary of the diapausing mosquito Culex pipiens.Comparative biochemistry and physiology. Part D, Genomics & proteomics · 2024Article
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Authors and funding
3 authors at 1 institution in 1 country.
Funding
Abstract
Culex pipiens, the northern house mosquito, is a major vector of West Nile virus. To survive the severe winter, adult mosquitoes enter a diapause programme. Extended lifespan and an increase in lipid storage are key indicators of diapause. Post-translational modifications to histone proteins impact the expression of genes and have been linked to the lifespan and energy utilisation of numerous insects. Here, we investigated the potential contribution of epigenetic alterations in initiating diapause in this mosquito species. Multiple sequence alignment of H3 sequences from other insect species demonstrates a high conservation of the H3 histone in Cx. pipiens throughout evolution. We then compared the levels of histone methylation in the ovaries and fat body tissues of diapausing and non-diapausing Cx. pipiens using western blots. Our data indicate that histone methylation levels in the ovaries of Cx. pipiens do not change during diapause. In contrast, H3K27me2 levels decrease more than twofold in the fat body of diapausing mosquitoes relative to non-diapausing counterparts. H3K27 methylation plays a crucial role in chromosome activation and inactivation during development in many insect species. This is predominantly governed by polycomb repressor complex 2. Intriguingly, a previous ChIP-seq study demonstrated that the transcription factor FOXO (Forkhead box O) targets the genes that comprise this complex. In addition, H3K27me2 exhibits dynamic abundance throughout the diapause programme in Cx. pipiens, suggesting its potential role in the initial activation of the diapause programme. This study expands our understanding of the relationship between alterations in epigenetic regulation and diapause.
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