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Open Access Articles

Stem cells

2015

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Full-Text Articles in Cell Biology

Bunched And Madm Function Downstream Of Tuberous Sclerosis Complex To Regulate The Growth Of Intestinal Stem Cells In Drosophila, Yingchao Nie, Qi Li, Alla Amcheslavsky, Juan Carlos Duhart, Alexey Veraksa, Hugo Stocker, Laurel A. Raftery, Y. Tony Ip Dec 2015

Bunched And Madm Function Downstream Of Tuberous Sclerosis Complex To Regulate The Growth Of Intestinal Stem Cells In Drosophila, Yingchao Nie, Qi Li, Alla Amcheslavsky, Juan Carlos Duhart, Alexey Veraksa, Hugo Stocker, Laurel A. Raftery, Y. Tony Ip

Open Access Articles

The Drosophila adult midgut contains intestinal stem cells that support homeostasis and repair. We show here that the leucine zipper protein Bunched and the adaptor protein Madm are novel regulators of intestinal stem cells. MARCM mutant clonal analysis and cell type specific RNAi revealed that Bunched and Madm were required within intestinal stem cells for proliferation. Transgenic expression of a tagged Bunched showed a cytoplasmic localization in midgut precursors, and the addition of a nuclear localization signal to Bunched reduced its function to cooperate with Madm to increase intestinal stem cell proliferation. Furthermore, the elevated cell growth and 4EBP phosphorylation ...