Abstract:
:Dystroglycan localizes to the basal domain of epithelial cells and has been reported to play a role in apical-basal polarity. Here, we show that Dystroglycan null mutant follicle cells have normal apical-basal polarity, but lose the planar polarity of their basal actin stress fibers, a phenotype it shares with Dystrophin mutants. However, unlike Dystrophin mutants, mutants in Dystroglycan or in its extracellular matrix ligand Perlecan lose polarity under energetic stress. The maintenance of epithelial polarity under energetic stress requires the activation of Myosin II by the cellular energy sensor AMPK. Starved Dystroglycan or Perlecan null cells activate AMPK normally, but do not activate Myosin II. Thus, Perlecan signaling through Dystroglycan may determine where Myosin II can be activated by AMPK, thereby providing the basal polarity cue for the low-energy epithelial polarity pathway. Since Dystroglycan is often downregulated in tumors, loss of this pathway may play a role in cancer progression.
journal_name
Dev Celljournal_title
Developmental cellauthors
Mirouse V,Christoforou CP,Fritsch C,St Johnston D,Ray RPdoi
10.1016/j.devcel.2008.11.006subject
Has Abstractpub_date
2009-01-01 00:00:00pages
83-92issue
1eissn
1534-5807issn
1878-1551pii
S1534-5807(08)00480-2journal_volume
16pub_type
杂志文章,收录出版abstract::DSL ligands promote proteolysis of the Notch receptor, to release active Notch intracellular domain (N(ICD)). Conversely, the E3 ubiquitin ligase Deltex can activate ligand-independent Notch proteolysis and signaling. Here we show that Deltex effects require endocytic trafficking by HOPS and AP-3 complexes. Our data s...
journal_title:Developmental cell
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abstract::Odorant receptors (ORs) in the olfactory epithelium bind to volatile small molecules leading to the perception of smell. ORs are expressed in many tissues but their functions are largely unknown. We show multiple ORs display distinct mRNA expression patterns during myogenesis in vitro and muscle regeneration in vivo. ...
journal_title:Developmental cell
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journal_title:Developmental cell
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journal_title:Developmental cell
pub_type: 评论,杂志文章,评审
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journal_title:Developmental cell
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journal_title:Developmental cell
pub_type: 评论,杂志文章
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journal_title:Developmental cell
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abstract::Lysosomes degrade macromolecular cargos, recycle catabolites, and serve as signaling platforms to maintain cell homeostasis, but their role at the tissue level is unclear. Here, we investigate lysosome regulation and function during C. elegans molting, a specialized extracellular matrix (ECM) remodeling process essent...
journal_title:Developmental cell
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journal_title:Developmental cell
pub_type: 评论,杂志文章
doi:10.1016/j.devcel.2016.11.001
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abstract::Autophagy defects have recently been associated with chromosomal instability, a hallmark of human cancer. However, the functional specificity and mechanism of action of autophagy-related factors in genome stability remain elusive. Here we report that UVRAG, an autophagic tumor suppressor, plays a dual role in chromoso...
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journal_title:Developmental cell
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journal_title:Developmental cell
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journal_title:Developmental cell
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journal_title:Developmental cell
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journal_title:Developmental cell
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journal_title:Developmental cell
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