Endogenous decline in homeostatic characteristics of supraorganismal level systems is similar to individual senescence. Similarity is in the fact that this decline as individual senescence is called by negative consequences from specialization of elements the system consists. In systems of supraorganismal level these effects are analogues of parametabolic reactions of senescence individuals.
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Trithorax regulates long-term memory in Drosophila through epigenetic maintenance of mushroom body metabolic state and translation capacity.
PLoS Biol
January 2025
Department of Biochemistry and Molecular Biology, Dalhousie University, Halifax, Canada.
The role of epigenetics and chromatin in the maintenance of postmitotic neuronal cell identities is not well understood. Here, we show that the histone methyltransferase Trithorax (Trx) is required in postmitotic memory neurons of the Drosophila mushroom body (MB) to enable their capacity for long-term memory (LTM), but not short-term memory (STM). Using MB-specific RNA-, ChIP-, and ATAC-sequencing, we find that Trx maintains homeostatic expression of several non-canonical MB-enriched transcripts, including the orphan nuclear receptor Hr51, and the metabolic enzyme lactate dehydrogenase (Ldh).
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Sci Rep
January 2025
Department of Pharmacology and Experimental Therapeutics, Boston University School of Medicine, Boston, United States.
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J Prev Alzheimers Dis
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Turku PET Centre, University of Turku, Turku, Finland; Turku PET Centre, Turku University Hospital, Turku, Finland; Department of Geriatrics, Turku University Hospital, Wellbeing services county of Southwestern Finland, Finland.
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