Membrane structure in ultrarapidly frozen, unpretreated, freeze-fractured myocardium.

Membrane structure in ultrarapidly frozen, unpretreated, freeze-fractured myocardium.
复制标题

超快速冷冻、未经预处理、冷冻断裂心肌中的膜结构。

DOI:
10.1161/01.res.61.1.141
复制
发表时间:
1987
影响因子:
20.1
通讯作者:
Mottino,G
Mottino,G
中科院分区:
医学1区
文献类型:
--
作者:
Frank,JS;Beydler,S;Mottino,G

文献摘要

参考文献

被引文献

相似文献

应用超快速冷冻技术监测冻裂心肌肌膜的结构。我们的两个目标是证明大面积的膜可以在没有可见冰晶损伤的情况下保存下来,因此,可以进行定量分析,并将直接冷冻的心肌膜与常规制备的组织结构进行比较。E面受化学预处理不足影响最大。首先,我们的实验室报告了E面颗粒密度从传统固定组织的379 +/- 30/微米2增加到未预处理组织的489 +/- 18/微米2。在E面上离散排列的12-15 nm颗粒是不固定的肌膜的显著特征。然而,在固定组织中,P面膜内颗粒(IMP)密度保持不变。在超速冻组织中,肌膜的特化区域增强。粘附连接的粒子域非常突出,在间隙连接旁边形成一个帽状结构。间隙连接的P面和E面都高度有序地排列成六边形阵列。膜上的小泡在P面和E面都很少见。
Ultrarapid freezing has been applied to monitor the structure of the freeze-fractured myocardial sarcolemma. Our two goals were to demonstrate that large areas of membrane can be preserved free of visible ice crystal damage and, thus, be amenable to quantitative analysis and to compare the structure of directly frozen myocardial membranes with conventionally prepared tissue. The E face was most affected by lack of chemical pretreatment. First, our laboratory reported an increase in E face particle density from 379 +/- 30/micron 2 in conventional fixed tissue to 489 +/- 18/micron 2 in unpretreated tissue. Discrete arrays of 12-15 nm particles on the E face were a striking feature of the unfixed sarcolemma. However, P face intramembrane particle (IMP) density remained unchanged from previous estimates in fixed tissue. Specialized regions of the sarcolemma were enhanced in ultrarapidly frozen tissue. Particle domains of the adherens junctions were very prominent in forming a cap alongside the gap junctions. Both the P and E faces of the gap junctions were highly ordered into hexagonal arrays. Caveolae in the membrane were infrequent in both P and E faces.
在电刺激后以已知的时间间隔快速冷冻单个完整的骨骼肌纤维。
DOI: --
发表时间: 1986
期刊: Scanning electron microscopy
影响因子: --
作者:
Nassar,R;Wallace,NR;Taylor,I;Sommer,JR
通讯作者: Sommer,JR
DOI: 10.1152/ajpheart.1985.248.3.h297
发表时间: 1985
期刊: The American journal of physiology
影响因子: --
作者:
Kordylewski,L;Karrison,T;Page,E
通讯作者: Page,E
DOI: --
发表时间: 1986
期刊: Muscle and Nerve
影响因子: 3.4
作者:
Robert E. Lee;Ann C. Poulos;R. F. Mayer;J. Rash
通讯作者: J. Rash
DOI: 10.1161/01.res.47.1.131
发表时间: 1980
影响因子: 20.1
作者:
J. Frank;S. Beydler;M. Kreman;E. Rau
通讯作者: E. Rau
完整和切割的绵羊心脏浦肯野纤维的间隙连接结构:Ca2 诱导的重新密封的冷冻断裂研究。
DOI: 10.1016/s0022-5320(81)80135-9
发表时间: 1981
期刊: Journal of ultrastructure research
影响因子: --
作者:
Shibata,Y;Page,E
通讯作者: Page,E