Document Detail


Prandiology of Drosophila and the CAFE assay.
MedLine Citation:
PMID:  17494737     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Studies of feeding behavior in genetically tractable invertebrate model systems have been limited by the lack of proper methodology. We introduce the Capillary Feeder (CAFE), a method allowing precise, real-time measurement of ingestion by individual or grouped fruit flies on the scale of minutes to days. Using this technique, we conducted the first quantitative analysis of prandial behavior in Drosophila melanogaster. Our results allow the dissection of feeding into discrete bouts of ingestion, defining two separate parameters, meal volume and frequency, that can be uncoupled and thus are likely to be independently regulated. In addition, our long-term measurements show that flies can ingest as much as 1.7x their body mass over 24 h. Besides the study of appetite, the CAFE can be used to monitor oral drug delivery. As an illustration, we used the CAFE to test the effects of dietary supplementation with two compounds, paraquat and ethanol, on food ingestion and preference. Paraquat, a prooxidant widely used in stress tests, had a strong anorexigenic effect. In contrast, in a feeding preference assay, ethanol-laced food, but not ethanol by itself, acted as an attractant.
Authors:
William W Ja; Gil B Carvalho; Elizabeth M Mak; Noelle N de la Rosa; Annie Y Fang; Jonathan C Liong; Ted Brummel; Seymour Benzer
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.     Date:  2007-05-09
Journal Detail:
Title:  Proceedings of the National Academy of Sciences of the United States of America     Volume:  104     ISSN:  0027-8424     ISO Abbreviation:  Proc. Natl. Acad. Sci. U.S.A.     Publication Date:  2007 May 
Date Detail:
Created Date:  2007-05-22     Completed Date:  2007-07-02     Revised Date:  2013-06-06    
Medline Journal Info:
Nlm Unique ID:  7505876     Medline TA:  Proc Natl Acad Sci U S A     Country:  United States    
Other Details:
Languages:  eng     Pagination:  8253-6     Citation Subset:  IM    
Affiliation:
Division of Biology 156-29, California Institute of Technology, Pasadena, CA 91125, USA.
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MeSH Terms
Descriptor/Qualifier:
Animals
Biological Assay*
Drosophila melanogaster / drug effects,  physiology*
Ethanol / pharmacology
Feeding Behavior / drug effects,  physiology*
Paraquat / pharmacology
Time Factors
Grant Support
ID/Acronym/Agency:
AG16630/AG/NIA NIH HHS; AG24366/AG/NIA NIH HHS; DK070154/DK/NIDDK NIH HHS
Chemical
Reg. No./Substance:
4685-14-7/Paraquat; 64-17-5/Ethanol
Comments/Corrections

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