Liver sinusoidal endothelial fenestrations in caveolin-1 knockout mice.

Liver sinusoidal endothelial fenestrations in caveolin-1 knockout mice.
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DOI:
10.1111/j.1549-8719.2009.00004.x
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发表时间:
2010-01
期刊:
Microcirculation (New York, N.Y. : 1994)
影响因子:
--
通讯作者:
Le Couteur DG
Le Couteur DG
中科院分区:
其他
文献类型:
--
作者:
Warren A;Cogger VC;Arias IM;McCuskey RS;Le Couteur DG

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开窗是肝窦内皮中的孔,其促进颗粒基质在窦腔和肝细胞之间的转移。开窗表达小窝蛋白-1并且与小窝具有结构相似性,因此可能是小窝的一种形式,小窝蛋白-1可能是开窗结构和功能的组成部分。因此,在小窝蛋白-1敲除小鼠的肝脏中研究开窗。应用扫描电镜、透射电镜和免疫金电镜技术对caveolin-1基因敲除小鼠和野生型小鼠的肝窦内皮等组织进行了研究。在野生型和基因敲除小鼠开窗的比较没有发现任何差异,无论是扫描或透射电子显微镜。开窗直径无显著差异(74 ± 13 nm敲除小鼠vs 78 ± 12 nm野生型小鼠),开窗孔隙率也无显著差异(6.5 ± 2.1敲除小鼠vs 7.3 ± 2.4%野生型小鼠)。相比之下,在基因敲除小鼠中,其他组织中的脂肪细胞和血管缺乏小窝。野生型小鼠肝脏的Caveolin-1免疫金显示在窦状内皮细胞中稀疏表达。肝窦内皮中的正常开窗结构不依赖于小窝蛋白-1,并且开窗不是小窝的一种形式。
Fenestrations are pores in the liver sinusoidal endothelium that facilitate the transfer of particulate substrates between the sinusoidal lumen and hepatocytes. Fenestrations express caveolin-1 and have structural similarities to caveolae, therefore might be a form of caveolae and caveolin-1 may be integral to fenestration structure and function. Therefore, fenestrations were studied in the livers of caveolin-1 knockout mice. Scanning, transmission and immunogold electron microscopic techniques were used to study the liver sinusoidal endothelium and other tissues in caveolin-1 knockout and wild-type mice. Comparison of fenestrations in wild-type and knockout mice did not reveal any differences on either scanning or transmission electron microscopy. The diameter of the fenestrations was not significantly different (74 ± 13 nm knockout mice vs 78 ± 12 nm wild-type mice) nor was the fenestration porosity (6.5 ± 2.1 knockout vs 7.3 ± 2.4% wild-type mice). In contrast, adipocytes and blood vessels in other tissues lacked caveolae in the knockout mice. Caveolin-1 immunogold of livers of wild-type mice indicated sparse expression in sinusoidal endothelial cells. The normal structure of fenestrations in the liver sinusoidal endothelium is not dependent upon caveolin-1 and fenestrations are not a form of caveolae.
DOI: 10.1152/ajprenal.90601.2008
发表时间: 2009-05
期刊: American journal of physiology. Renal physiology
影响因子: --
作者:
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通讯作者: Braet F
DOI: 10.1152/ajpgi.00069.2008
发表时间: 2008-07-01
影响因子: 4.5
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发表时间: 1995-01-01
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发表时间: 2003-07-01
影响因子: 8.7
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DOI: 10.1679/aohc.47.359
发表时间: 1984-01-01
期刊: ARCHIVUM HISTOLOGICUM JAPONICUM
影响因子: --
作者:
OHATA, M;TANUMA, Y;ITO, T
通讯作者: ITO, T