Abstract:
:Longitudinal muscle of myometrial tissues from immature rats were examined by quantitative thin section electron microscopy for the presence of gap junctions after treatment with estradiol with and without tamoxifen, and cycloheximide for 1-6 days. Gap junctions were present between myometrial cells on days 4, 5, and 6 after treatment with estradiol (500 micrograms/day). Tamoxifen administered concomitantly with estradiol over the 6-day period completely prevented induction of the junctions. Gap junctions were not detected in the myometrium after treatment with tamoxifen alone. Administration of cycloheximide together with estradiol on day 0 of the 6-day period had no effect on gap junction frequency but resulted in a reduction in gap junction size in the myometrium after continued treatment with the hormone. Treatment with cycloheximide on day 1, however, significantly suppressed the effect of further estradiol treatment on the induction of gap junctions in the myometrium. Junctions were not visible in the tissues from animals treated with cycloheximide alone or in the control groups treated with sesame oil. These results indicate that estradiol influences the presence of gap junctions in the myometrium by regulating the synthesis of gap junction proteins through the steroid receptor mechanism.
journal_name
Can J Physiol Pharmacoljournal_title
Canadian journal of physiology and pharmacologyauthors
MacKenzie LW,Garfield REdoi
10.1139/y86-117subject
Has Abstractpub_date
1986-06-01 00:00:00pages
703-6issue
6eissn
0008-4212issn
1205-7541journal_volume
64pub_type
杂志文章abstract::Theanine and caffeine, 2 naturally occurring components in tea, have repeatedly been shown to deliver unique cognitive benefits when consumed in combination. In this study, we assessed the beneficial synergistic effects of concurrent treatment with theanine and caffeine against cerebral damage in rats. Theanine and ca...
journal_title:Canadian journal of physiology and pharmacology
pub_type: 杂志文章
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更新日期:2013-07-01 00:00:00
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journal_title:Canadian journal of physiology and pharmacology
pub_type: 杂志文章,评审
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journal_title:Canadian journal of physiology and pharmacology
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journal_title:Canadian journal of physiology and pharmacology
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