title: Trehalase regulates neuroepithelial stem cell maintenance and differentiation in the Drosophila optic lobe.
abstract: As one of the major hydrolases in Drosophila, trehalase (Treh) catalyzes the hydrolysis of trehalose into glucose providing energy for flight muscle activity. Treh is highly conserved from bacteria to humans, but little is known about its function during animal development. Here, we analyze the function of Treh in Drosophila optic lobe development. In the optic lobe, neuroepithelial cells (NEs) first divide symmetrically to expand the stem cell pool and then differentiate into neuroblasts, which divide asymmetrically to generate medulla neurons. We find that the knockdown of Treh leads to a loss of the lamina and a smaller medulla. Analyses of Treh RNAi-expressing clones and loss-of-function mutants indicate that the lamina and medulla phenotypes result from neuroepithelial disintegration and premature differentiation into medulla neuroblasts. Although the principal role of Treh is to generate glucose, the Treh loss-of-function phenotype cannot be rescued by exogenous glucose. Thus, our results indicate that in addition to being a hydrolase, Treh plays a role in neuroepithelial stem cell maintenance and differentiation during Drosophila optic lobe development.
authors.affiliation: School of Life Sciences, Tsinghua University, Beijing, China.
authors.forename: Xi
authors.initials: X
authors.lastname: Chen
authors.affiliation: School of Life Sciences, Tsinghua University, Beijing, China; Institute for Biological Product Control, National Institutes for Food and Drug Control, Beijing, China.
authors.forename: Yaru
authors.initials: Y
authors.lastname: Quan
authors.affiliation: School of Life Sciences, Tsinghua University, Beijing, China.
authors.forename: Hongbin
authors.initials: H
authors.lastname: Wang
authors.affiliation: School of Life Sciences, Tsinghua University, Beijing, China.
authors.forename: Hong
authors.initials: H
authors.lastname: Luo
mesh_terms: D000818:Animals; D030801:Animals, Genetically Modified; D002454:Cell Differentiation / Q000235:genetics; D004330:Drosophila / Q000196:embryology / Q000502:physiology*; D005260:Female; D018507:Gene Expression Regulation, Developmental; D015971:Gene Expression Regulation, Enzymologic; D008297:Male; D009154:Mutation; D046569:Neuroepithelial Cells / Q000166:cytology* / Q000378:metabolism; D009899:Optic Lobe, Nonmammalian / Q000166:cytology / Q000196:embryology / Q000378:metabolism*; D013234:Stem Cells / Q000166:cytology*; D014198:Trehalase / Q000235:genetics / Q000378:metabolism*
chemical_list: D014198:Trehalase