Multiomic Analysis of Adult Diapause in Drosophila melanogaster Identifies Hallmarks of Cellular Quiescence [RNA-Seq]
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ABSTRACT: Diapause and diapause-like states constitute natural, inducible, and evolutionarily conserved examples of lifespan plasticity that are well-suited to represent physiologically accurate models for longevity. We integrated ATAC-seq and RNA-seq technologies to probe the transcriptional regulatory pathways controlling lifespan plasticity in diapause.
Project description:Diapause and diapause-like states constitute natural, inducible, and evolutionarily conserved examples of lifespan plasticity that are well-suited to represent physiologically accurate models for longevity. We integrated ATAC-seq and RNA-seq technologies to probe the transcriptional regulatory pathways controlling lifespan plasticity in diapause.
Project description:The study describes differential expression of genes in adult female flies (Canton S) kept for three weeks in reproductive diapause, compared to ones kept in normal conditions. It discusses signal pathways that are activated or inactivated during diapause and how this relates to the general diapause phenotype with arrested vitellogenesis, extended lifespan, decreased somatic senescence, increased stress resistance and reallocated energy resources.
Project description:The most common ladybird beetle, Coccinella septempunctata L., is an excellent predator of crop pests such as aphids and white flies, and it shows a wide range of adaptability, a large appetite and a high reproductive ability. In this study, we collected female adults in three different states, i.e., non-diapause, diapause and diapause termination, for transcriptome sequencing. The experimental insects consisted of three different states as follows: Non-diapause female insects were reared at 24±1°C, with a RH of 70±10% and a 16:8 h light: dark (L: D) photoperiod and collected after their first oviposition. Female adults in diapause were reared at 18±1°C at an RH of 70±10% and a 10:14-h (L:D) photoperiod. The experimental diapause insects were collected after 30 days. Diapause-terminated adults were transferred to another climatic cabinet with the 30-day diapause insects and reared under the same conditions as the non-diapause insects. After their first oviposition, the female insects were collected and stored at -80°C. Three biological replicates per treatment (non-diapause, diapause, diapause-terminated) were sequenced using Illumina HiSeq 2500.
Project description:The most common ladybird beetle, Coccinella septempunctata L., is an excellent predator of crop pests such as aphids and white flies, and it shows a wide range of adaptability, a large appetite and a high reproductive ability. In this study, we collected female adults in three different states, i.e., non-diapause, diapause and diapause termination, for transcriptome sequencing.
Project description:Gene expression microarray exprement comparing differential expression between: 1) Early Diapause (ED), 2) Late Diapause (LD), 3) Non-Diapause (ND), 4) Hexane-induced diapause break (HEX). Four phenotypes (ED,ND,LD,HEX), four replicate pools of four individuals (four individuals in each replicate) in each phenotype, four competitve hybs comparing each phenotype to every other phenotype.
Project description:Embryonic diapause is a widely occurring evolutionary adaptation phenomenon in animals. Artemia is one of the classic animal models for diapause research. The current studies of Artemia diapause mainly focus on the induction and maintenance of the embryonic diapause, but there is little research on the molecular regulatory mechanism of Artemia embryonic diapause termination (EDT) and embryonic reactivation. Here the gene expression of Artemia cyst in diapause stage and 5 hours after embryonic diapause termination (EDT), which is in post-diapause stage were tested by RNA-seq to analyze the mechanism of signal regulation involved in Artemia EDT at the molecular level.