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Involvement of dynamin-2 in formation of discoid vesicles in urinary bladder umbrella cells.

Publication ,  Journal Article
Terada, N; Ohno, N; Saitoh, S; Saitoh, Y; Fujii, Y; Kondo, T; Katoh, R; Chan, C; Abraham, SN; Ohno, S
Published in: Cell Tissue Res
July 2009

Umbrella cells (UCs) of the epithelium of the urinary bladder have the capacity to control bladder volume by regulating exocytosis/endocytosis of their intracellular discoid vesicles (DVs). Dynamin (Dyn) is a GTPase that promotes endocytic processes through scission of cell membranes. We have examined whether Dyn2, the most abundant Dyn form, is expressed in UCs and contributes to their endocytic actions. A specific antibody against Dyn2 was used to localize Dyn2 in human and rodent UCs by immunohistochemistry. To clarify the functional roles of Dyn2, mouse bladders were treated with a Dyn-GTPase inhibitor, dynasore, and its effects on their UC structure were assessed. Since uropathogenic Escherichia coli can be encased into UCs during infection, we used immunohistochemistry to determine whether bacteria-encasing compartments in the infected UCs were also enriched with Dyn2. Light microscopy showed that Dyn2 was abundantly expressed in UCs, especially near the apical cytoplasmic regions. By immunoelectron microscopy, Dyn2 was found on and around DV membranes in UCs. Ultrastructural analysis with a quick-freezing and deep-etching method confirmed these findings and revealed the existence of distinct Dyn2-bound microfilaments in close association with DV membranes. Dynasore treatment of bladders markedly reduced the number of DVs in UCs. In infected UCs, E. coli was encased in compartments enriched in Dyn2. Therefore, Dyn2 is highly enriched in UCs and mostly associated with membranes of DVs and microfilaments in the UCs. Pretreatment of bladders with dynasore inhibits E. coli invasion of UCs. Dyn2 thus contributes to the structural integrity of DVs and to the endocytic activity of UCs.

Duke Scholars

Published In

Cell Tissue Res

DOI

EISSN

1432-0878

Publication Date

July 2009

Volume

337

Issue

1

Start / End Page

91 / 102

Location

Germany

Related Subject Headings

  • Urothelium
  • Urinary Bladder
  • Neurology & Neurosurgery
  • Microscopy, Immunoelectron
  • Mice, Inbred C57BL
  • Mice, Inbred BALB C
  • Mice
  • Male
  • Immunohistochemistry
  • Hydrazones
 

Citation

APA
Chicago
ICMJE
MLA
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Terada, N., Ohno, N., Saitoh, S., Saitoh, Y., Fujii, Y., Kondo, T., … Ohno, S. (2009). Involvement of dynamin-2 in formation of discoid vesicles in urinary bladder umbrella cells. Cell Tissue Res, 337(1), 91–102. https://doi.org/10.1007/s00441-009-0804-z
Terada, Nobuo, Nobuhiko Ohno, Sei Saitoh, Yurika Saitoh, Yasuhisa Fujii, Tetsuo Kondo, Ryohei Katoh, Cheryl Chan, Soman N. Abraham, and Shinichi Ohno. “Involvement of dynamin-2 in formation of discoid vesicles in urinary bladder umbrella cells.Cell Tissue Res 337, no. 1 (July 2009): 91–102. https://doi.org/10.1007/s00441-009-0804-z.
Terada N, Ohno N, Saitoh S, Saitoh Y, Fujii Y, Kondo T, et al. Involvement of dynamin-2 in formation of discoid vesicles in urinary bladder umbrella cells. Cell Tissue Res. 2009 Jul;337(1):91–102.
Terada, Nobuo, et al. “Involvement of dynamin-2 in formation of discoid vesicles in urinary bladder umbrella cells.Cell Tissue Res, vol. 337, no. 1, July 2009, pp. 91–102. Pubmed, doi:10.1007/s00441-009-0804-z.
Terada N, Ohno N, Saitoh S, Saitoh Y, Fujii Y, Kondo T, Katoh R, Chan C, Abraham SN, Ohno S. Involvement of dynamin-2 in formation of discoid vesicles in urinary bladder umbrella cells. Cell Tissue Res. 2009 Jul;337(1):91–102.
Journal cover image

Published In

Cell Tissue Res

DOI

EISSN

1432-0878

Publication Date

July 2009

Volume

337

Issue

1

Start / End Page

91 / 102

Location

Germany

Related Subject Headings

  • Urothelium
  • Urinary Bladder
  • Neurology & Neurosurgery
  • Microscopy, Immunoelectron
  • Mice, Inbred C57BL
  • Mice, Inbred BALB C
  • Mice
  • Male
  • Immunohistochemistry
  • Hydrazones