Dystroglycan and perlecan provide a basal cue required for epithelial polarity during energetic stress.
Dystroglycan and perlecan provide a basal cue required for epithelial polarity during energetic stress.
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DOI:
10.1016/j.devcel.2008.11.006
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发表时间:
2009-01
影响因子:
11.8
通讯作者:
Ray, Robert P.
中科院分区:
文献类型:
--
作者:
Mirouse, Vincent;Christoforou, Christina P.;Fritsch, Cornelia;St Johnston, Daniel;Ray, Robert P.
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.
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DOI:
10.1083/jcb.200702053
发表时间:
2007-05-07
期刊:
The Journal of cell biology
影响因子:
--
作者:
Mirouse V;Swick LL;Kazgan N;St Johnston D;Brenman JE
通讯作者:
Brenman JE
影响因子:
4.8
作者:
Durbeej, M;Campbell, KP
通讯作者:
Campbell, KP
DOI:
10.1046/j.1432-1327.2000.01337.x
发表时间:
2000-06-01
期刊:
EUROPEAN JOURNAL OF BIOCHEMISTRY
影响因子:
--
作者:
Friedrich, MVK;Schneider, M;Baumgartner, S
通讯作者:
Baumgartner, S
影响因子:
64.5
作者:
Henry, MD;Campbell, KP
通讯作者:
Campbell, KP
影响因子:
4.6
作者:
Schneider, Martina;Khalil, Ashraf A.;Baumgartner, Stefan
通讯作者:
Baumgartner, Stefan