Specific localization of gap junction protein, connexin45, in the deep muscular plexus of dog and rat small intestine
Specific localization of gap junction protein, connexin45, in the deep muscular plexus of dog and rat small intestine
复制标题
间隙连接蛋白 connexin45 在狗和大鼠小肠深肌丛中的特异性定位
作者:
K.;A. Kuraoka;M. Kawabuchi;Y. Shibata
Abstract Cellular networks of pacemaker activity in intestinal movements are still a matter of debate. Because gap-junctional intercellular communication in the intestinal wall may provide important clues for understanding regulatory mechanisms of intestinal movements, we have attempted to clarify the distribution patterns of three types of gap junction proteins. Using antibodies for connexin40, connexin43, connexin45, smooth muscle actin, and vimentin, immunocytochemical observations were made with the confocal laser scanning microscope on cryosections of fresh-frozen small intestine and colon of the dog and rat. Connexin 45 was localized along the deep muscular plexus of the small intestine in both dog and rat. Double labeling studies revealed that connexin45 overlapped with vimentin –, but not actin-positive areas, indicating the fibroblast-like nature of the cells, rather than their being smooth muscle-like. Connexin43 immunoreactivity appeared along the smooth muscle cell surface in the outer circular layer of the small intestine of both animals. Connexin 40 immunoreactivity was not observed in the muscle layer other than in the wall of large blood vessels. It is suggested that connexin45-expressing cells along the deep muscular plexus of dog and rat small intestine are likely to act as a constituent of a pacemaker system, which may include a conductive system, by forming a cellular network operating via specific types of gap junctions.
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DOI:
10.1242/dev.113.1.165
发表时间:
1991
期刊:
Development (Cambridge, England)
影响因子:
--
作者:
Risek,B;Gilula,NB
通讯作者:
Gilula,NB
影响因子:
29.4
作者:
Sanders, KM
通讯作者:
Sanders, KM
DOI:
10.1016/0735-1097(94)90879-6
发表时间:
1994-10-01
影响因子:
24
作者:
DAVIS, LM;KANTER, HL;SAFFITZ, JE
通讯作者:
SAFFITZ, JE
DOI:
10.1152/ajpgi.1993.265.4.g638
发表时间:
1993
期刊:
The American journal of physiology
影响因子:
--
作者:
Torihashi,S;Kobayashi,S;Gerthoffer,WT;Sanders,KM
通讯作者:
Sanders,KM
影响因子:
4
作者:
Gourdie,RG;Severs,NJ;Green,CR;Rothery,S;Germroth,P;Thompson,RP
通讯作者:
Thompson,RP