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Proc Natl Acad Sci U S A

Title:		Gene-silencing reveals the functional significance of pheromone biosynthesis activating neuropeptide receptor (PBAN-R) in a male moth
Author(s):		Bober R; Rafaeli A;
Address:		"Department of Entomology, Hebrew University, P.O. Box 12, Rehovot 76100, Israel"
Journal Title:		Proc Natl Acad Sci U S A
Year:		2010
Volume:		20100913
Issue:		39
Page Number:		16858 - 16862
DOI:		10.1073/pnas.1008812107
ISSN/ISBN:		1091-6490 (Electronic) 0027-8424 (Print) 0027-8424 (Linking)
Abstract:		"The role of pheromone biosynthesis activating neuropeptide (PBAN) in the regulation of pheromone biosynthesis of several female moth species is well elucidated, but its role in the males has been a mystery for over two decades since its discovery from both male and female central nervous systems. In previous studies we have identified the presence of the gene transcript for the PBAN-G-protein coupled receptor (PBAN-R) in Helicoverpa armigera male hair-pencil-aedaegus complexes (male complexes), a tissue structurally homologous to the female pheromone gland. Moreover, we showed that this transcript is up-regulated during pupal-adult development, analogous to its regulation in the female pheromone-glands, thereby indicating a likely functional gene. Here we argue in favor of PBAN's role in regulating the free fatty-acid components (myristic, palmitic, stearic, and oleic acids) and alcohol components (hexadecanol, cis-11 hexadecanol, and octadecanol) in male complexes. We demonstrate the diel periodicity in levels of male components, with peak titers occurring during the 7th-9th h in the scotophase, coincident with female pheromone production. In addition, we show significant stimulation of component levels by synthetic HezPBAN. Furthermore, we confirm PBAN's function in this tissue through knockdown of the PBAN-R gene using RNAi-mediated gene-silencing. Injections of PBAN-R dsRNA into the male hemocoel significantly inhibited levels of the various male components by 58%-74%. In conclusion, through gain and loss of function we revealed the functionality of the PBAN-R and the key components that are up-regulated by PBAN"
Keywords:		"Animals Fatty Acids/metabolism Fatty Alcohols/metabolism Female Gene Silencing Insect Proteins/genetics/*metabolism Male Moths/genetics/*metabolism Neuropeptides/*metabolism Pheromones/*biosynthesis/genetics Receptors, Neuropeptide/genetics/*metabolism;"
Notes:		"MedlineBober, Rachel Rafaeli, Ada eng Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. 2010/09/15 Proc Natl Acad Sci U S A. 2010 Sep 28; 107(39):16858-62. doi: 10.1073/pnas.1008812107. Epub 2010 Sep 13"