Correlation between sexual maturation and induction of persistent estrus by continuous illumination.
Correlation between sexual maturation and induction of persistent estrus by continuous illumination.
复制标题
性成熟与持续照明诱导持续发情之间的相关性。
DOI：
10.1507/endocrj1954.22.453
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发表时间：
1975
期刊：
影响因子：
--
通讯作者：
K. Maekawa
中科院分区：
文献类型：
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作者：
Y. Takeo;K. Shirama;K. Shimizu;K. Maekawa
从新生日起在连续光照下饲养的大鼠，长期处于节律性发情周期，不易出现所谓的阴道连续发情。相反，30日龄左右的未成熟大鼠在暴露于连续光照后不久就表现出与成年大鼠一样的持续发情。本文旨在研究持续光照下日龄与持续发情时间的关系。结果表明，年龄越小的大鼠达到持续发情所需的时间越长;在0（A组）、5（B组）、10（C组）、15-16（D组）和30（E组）日龄时转移到连续照明环境中的大鼠需要的平均时间为132.1 ± 8.4，出生后分别为126.8 ± 8.9、89.7 ± 6.2、91.5 ± 3.8和70.3 ± 3.0天达到持续发情。在本数据中，观察到B组和C组之间存在显著差异。虽然所有大鼠在持续发情期相同长度后处死，但各组之间的实际内分泌水平似乎不同;需要更长时间达到持续发情的大鼠卵巢和肾上腺较小。
The rats brought up under continuous illumination from the neonatal day persist in the rhythmic estrous cycle for long time and do not easily reveal so-called continuous vaginal estrus. On the contrary, immature rats at about 30 days of age show the persistent estrus soon after exposure to continuous illumination as well as adult rats. The purpose of this paper was to examine the relation of the age placed under continuous illumination and the time required to reach the persistent estrus. As the results, it was found that the younger rats need proportionally the longer time to reach the persistent estrus; the rats which were transferred into continuously illuminated environment at 0 (group A), 5 (group B), 10 (group C), 15-16 (group D) and 30 (group E) days of age required a mean time of 132.1 +/- 8.4, 126.8 +/- 8.9, 89.7 +/- 6.2, 91.5 +/- 3.8 and 70.3 +/- 3.0 days after birth to reach the persistent estrus, respectively. In the present data, a significant difference was seen between group B and C. Though all rats were killed after the same length of persistently estrous periods, actual endocrine level appeared to differ among the groups; the rats required longer time to reach the persistent estrus had smaller ovaries and adrenals.