Smokeless tobacco-induced lamellar body abnormalities.

Smokeless tobacco-induced lamellar body abnormalities.
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无烟烟草引起的层状体异常。

DOI:
10.1111/j.1601-0825.2005.01211.x
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发表时间:
2006
期刊:
影响因子:
3.8
通讯作者:
Cordell,GA
Cordell,GA
中科院分区:
医学3区
文献类型:
--
作者:
Colvard,MD;Ashrafi,SH;Alonge,OK;Cordell,GA

文献摘要

参考文献

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目的:比较无烟烟草(smokeless tobacco,ST)对金黄地鼠颊囊上皮中板层体(laminate body,Lb)的形态学改变和数量分布的影响。Ashrafi,A.达斯河,巴西-地Worawongvasu,B. Mehdinejad和J. Waterhouse(1992)扫描显微镜6:183]。实验组动物在右侧贮袋内给予大部分的鼻烟,每周5天,连续24个月,对照组动物不给予鼻烟。  24个月后,处理上皮组织用于电镜研究。 结果:在对照组中,Lb将其内容物挤入颗粒细胞上层的细胞间隙以及颗粒细胞层与角蛋白层之间,形成一个渗透屏障。相反,在无烟烟草处理的上皮,大部分的Lb,形成的内部和积累的颗粒细胞内,没有挤压到细胞间隙的内容物,形成一个脂质化合物permeability barrier.Conclusions:商业碱性ST可能有助于Lb的异常积累的颗粒细胞层,并影响Lb的挤出过程,形成一个不完整的渗透性屏障在口腔上皮。
Objectives:To compare the morphological changes and quantitative distribution of lamellar bodies (Lb) (membrane coating granules) in the hamster cheek pouch epithelium with smokeless tobacco (ST).Materials and methods:Archives of experimental material from previously published studies [S. Ashrafi, A. Das, R. Worawongvasu, B. Mehdinejad and J. Waterhouse (1992)Scanning Microscopy6: 183] were utilized. Animals in experimental group received most ST (snuff) in their right pouch, 5 days weekly, for 24 months, while no snuff was given to control group. After 24 months, the epithelial tissues were processed for electron microscopic study. Volume densities of Lb were assessed by morphometry.Main outcome measures:Densities of Lb in the two groups, experimentalvscontrol.Results:In the control, Lb extruded their contents into the intercellular spaces of upper granular layers and in between the last granular cell layers and keratin layers to form a permeability barrier. Conversely, in the smokeless tobacco‐treated epithelium, the majority of the Lb that were formed remained inside and accumulated within the granular cells, without extruding their contents into the intercellular spaces to form a lipid compound permeability barrier.Conclusions:Commercial alkaline ST may have contributed to the abnormal accumulation of Lb in the granular cell layer and affected the extrusion process of Lb to form an incomplete permeability barrier in the oral epithelium.
17β-雌二醇在胎兔肺中刺激磷脂酰胆碱合成。
DOI: --
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DOI: --
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DOI: 10.1016/0005-2760(76)90171-5
发表时间: 1976
期刊: Biochimica et biophysica acta
影响因子: --
作者:
W. Stern;Cecilia Kovac;P. Weinhold
通讯作者: P. Weinhold