Reference Report

Reference
Citation	Bland, M.L., Lee, R.J., Magallanes, J.M., Foskett, J.K., Birnbaum, M.J. (2010). AMPK supports growth in Drosophila by regulating muscle activity and nutrient uptake in the gut. Dev. Biol. 344(1): 293--303. (Export to RIS)
FlyBase ID	FBrf0211348
Publication Type	Research paper
PubMed ID	20478298
PubMed Abstract	The larval phase of the Drosophila life cycle is characterized by constant food intake, resulting in a two hundred-fold increase in mass over four days. Here we show that the conserved energy sensor AMPK is essential for nutrient intake in Drosophila. Mutants lacking dAMPKalpha are small, with low triglyceride levels, small fat body cells and early pupal lethality. Using mosaic analysis, we find that dAMPKalpha functions as a nonautonomous regulator of cell growth. Nutrient absorption is impaired in dAMPKalpha mutants, and this defect stems not from altered gut epithelial cell polarity but from impaired peristaltic activity. Expression of a wild-type dAMPKalpha transgene or an activated version of the AMPK target myosin regulatory light chain (MRLC) in the dAMPKalpha mutant visceral musculature restores gut function and growth. These data suggest strongly that AMPK regulates visceral smooth muscle function through phosphorylation of MRLC. Furthermore, our data show that in Drosophila, AMPK performs an essential cell-nonautonomous function, serving the needs of the organism by promoting activity of the visceral musculature and, consequently, nutrient intake.
DOI	10.1016/j.ydbio.2010.05.010
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Language of Publication	English
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Publication Type	Journal
Abbreviation	Dev. Biol.
Title	Developmental Biology
Publication Year	1959-
ISBN/ISSN	0012-1606
Data from Reference
Aberrations (1)
	Df(1)SNF1A^Δ39
Alleles (14)
	foxo^TM.Scer\UAS gig^Scer\UAS.cTa lkb1^4B1-11 Scer\GAL4^byn-Gal4 Scer\GAL4^how-24B Scer\GAL4^Mef2.PR Scer\GAL4^Mhc.PW Scer\GAL4^r4 SNF1A¹ SNF1A^{K56R.Scer\UAS} SNF1A^Scer\UAS.cBa SNF1A^Δ39 sqh^{E20E21.Scer\UAS.cCa} Tsc1^Scer\UAS.cTa
Constructs (9)
	P{GAL4-Mef2.R} P{GAL4-Mhc.W} P{r4-GAL4} P{UAS-foxo.TM} P{UAS-gig.T} P{UAS-SNF1A.B} P{UAS-SNF1A.K56R} P{UAS-sqh.E20E21.C} P{UAS-Tsc1.T}
Genes (12)
	ACC CG3719 CG32813 Fas3 foxo gig lkb1 Mhc Scer\GAL4 SNF1A sqh Tsc1
Insertions (3)
	P{GawB}byn^Gal4 P{GawB}how^24B P{SUPor-P}KG09204
Natural transposons (1)
	P-element