Reference Report

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Citation	Zerofsky, M., Harel, E., Silverman, N., Tatar, M. (2005). Aging of the innate immune response in Drosophila melanogaster. Aging Cell 4(2): 103--108. (Export to RIS)
FlyBase ID	FBrf0183716
Publication Type	Research paper
PubMed ID	15771614
PubMed Abstract	Increased activation of the innate immune system is a common feature of aging animals, including mammals and Drosophila melanogaster. With age, D. melanogaster progressively express higher levels of many antimicrobial peptides. It is unknown, however, whether this pattern reflects age-dependent changes in the function of the immune system itself or arises simply because aged adults have greater cumulative exposure to pathogens. Here we demonstrate that aged D. melanogaster transcribe more antimicrobial diptericin when experimentally exposed to septic bacterial infections. This strong net response in older females is the result of persistent diptericin transcription upon septic exposure, whereas young females rapidly terminate this induction. In contrast to their response to septic exposure, when exposed to killed bacteria aged females have less capacity to induce diptericin. Because this functional capacity of innate immunity declines with age, we conclude that female Drosophila undergo immune senescence. Furthermore, we show that fecundity is reduced by induction of innate immunity via the immune deficiency pathway. Consequently, maximum reproduction will occur when the immune response is tightly controlled in young females, even if this increases infection risk at later ages.
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Language of Publication	English
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Publication Type	Journal
Abbreviation	Aging Cell
Title	Aging Cell
Publication Year	2002-
ISBN/ISSN	1474-9718 1474-9728
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	CYLD Dpt imd Rel