Title: The progesterone antagonist mifepristone/RU486 blocks the negative effect on life span caused by mating in female Drosophila.
Authors: Landis, Gary N; Salomon, Matthew P; Keroles, Daniel; Brookes, Nicholas; Sekimura, Troy; Tower, John
Published In Aging (Albany NY), (2015 Jan)
Abstract: Mating causes decreased life span in female Drosophila. Here we report that mifepristone blocked this effect, yielding life span increases up to +68%. Drug was fed to females after mating, in the absence of males, demonstrating function in females. Mifepristone did not increase life span of virgin females or males. Mifepristone reduced progeny production but did not reduce food intake. High-throughput RNA sequencing was used to identify genes up-regulated or down-regulated upon mating, and where the change was reduced by mifepristone. Five candidate positive regulators of life span were identified, including dosage compensation regulator Unr and three X-linked genes: multi sex combs (PcG gene), Dopamine 2-like receptor and CG14215. The 37 candidate negative genes included neuropeptide CNMamide and several involved in protein mobilization and immune response. The results inform the interpretation of experiments involving mifepristone, and implicate steroid hormone signaling in regulating the trade-off between reproduction and life span.
PubMed ID: 25614682
MeSH Terms: Age Factors; Animals; DNA-Binding Proteins/genetics; DNA-Binding Proteins/metabolism; Drosophila Proteins/genetics; Drosophila Proteins/metabolism; Drosophila melanogaster/drug effects*; Drosophila melanogaster/embryology; Drosophila melanogaster/genetics; Drosophila melanogaster/metabolism; Female; Gene Expression Regulation, Developmental; Genotype; High-Throughput Nucleotide Sequencing; Hormone Antagonists/pharmacology*; Longevity/drug effects*; Longevity/genetics; Male; Mifepristone/pharmacology*; Phenotype; Positive Transcriptional Elongation Factor B/genetics; Positive Transcriptional Elongation Factor B/metabolism; Progesterone/antagonists & inhibitors*; Progesterone/metabolism; Receptors, Dopamine D2/genetics; Receptors, Dopamine D2/metabolism; Reproduction; Sex Factors; Signal Transduction/drug effects*; Time Factors