The enterocyte microvillus is a vesicle-generating organelle.
The enterocyte microvillus is a vesicle-generating organelle.
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DOI:
10.1083/jcb.200902147
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发表时间:
2009-06-29
期刊:
影响因子:
--
通讯作者:
Tyska MJ
中科院分区:
文献类型:
--
作者:
McConnell RE;Higginbotham JN;Shifrin DA Jr;Tabb DL;Coffey RJ;Tyska MJ
For decades, enterocyte brush border microvilli have been viewed as passive cytoskeletal scaffolds that serve to increase apical membrane surface area. However, recent studies revealed that in the in vitro context of isolated brush borders, myosin-1a (myo1a) powers the sliding of microvillar membrane along core actin bundles. This activity also leads to the shedding of small vesicles from microvillar tips, suggesting that microvilli may function as vesicle-generating organelles in vivo. In this study, we present data in support of this hypothesis, showing that enterocyte microvilli release unilamellar vesicles into the intestinal lumen; these vesicles retain the right side out orientation of microvillar membrane, contain catalytically active brush border enzymes, and are specifically enriched in intestinal alkaline phosphatase. Moreover, myo1a knockout mice demonstrate striking perturbations in vesicle production, clearly implicating this motor in the in vivo regulation of this novel activity. In combination, these data show that microvilli function as vesicle-generating organelles, which enable enterocytes to deploy catalytic activities into the intestinal lumen.
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影响因子:
64.8
作者:
Hoebe, K;Georgel, P;Beutler, B
通讯作者:
Beutler, B
DOI:
10.1083/jcb.200604046
发表时间:
2006-12-04
期刊:
The Journal of cell biology
影响因子:
--
作者:
Hanono A;Garbett D;Reczek D;Chambers DN;Bretscher A
通讯作者:
Bretscher A
影响因子:
30.3
作者:
Bates, Jennifer M.;Akerlund, Janie;Guillemin, Karen
通讯作者:
Guillemin, Karen
影响因子:
158.5
作者:
CUTZ, E;RHOADS, JM;FORSTNER, GG
通讯作者:
FORSTNER, GG
DOI:
10.1111/j.1651-2227.1976.tb04409.x
发表时间:
1976-01-01
期刊:
ACTA PAEDIATRICA SCANDINAVICA
影响因子:
--
作者:
IANCU, T;ELIAN, E
通讯作者:
ELIAN, E