NDLI: Disruption of insect diapause using agonists and an antagonist of diapause hormone

Content Provider	PubMed Central
Author	Zhang, Qirui Nachman, Ronald J. Kaczmarek, Krzysztof Zabrocki, Janusz Denlinger, David L.
Abstract	The dormant state known as diapause is widely exploited by insects to circumvent winter and other adverse seasons. For an insect to survive, feed, and reproduce at the appropriate time of year requires fine coordination of the timing of entry into and exit from diapause. One of the hormones that regulates diapause in moths is the 24-aa neuropeptide, diapause hormone (DH). Among members of the Helicoverpa/Heliothis complex of agricultural pests, DH prompts the termination of pupal diapause. Based on the structure of DH, we designed several agonists that are much more active than DH in breaking diapause. One such agonist that we describe also prevents the entry into pupal diapause when administered to larvae that are environmentally programmed for diapause. In addition, we used the unique antagonist development strategy of incorporating a dihydroimidazole (“Jones”) trans-Proline mimetic motif into one of our DH agonists, thereby converting the agonist into a DH antagonist that blocks the termination of diapause. These results suggest potential for using such agents or next-generation derivatives for derailing the success of overwintering in pest species.
Related Links	http://dx.doi.org/10.1073/pnas.1113863108
Ending Page	16926
Page Count	5
Starting Page	16922
File Format	PDF
ISSN	00278424
e-ISSN	10916490
Journal	Proceedings of the National Academy of Sciences of the United States of America
Issue Number	41
Volume Number	108
Language	English
Publisher	National Academy of Sciences
Publisher Date	2011-10-11
Access Restriction	Open
Rights Holder	National Academy of Sciences
Subject Keyword	General Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Multidisciplinary

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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