Photoperiodic regulation of the testes of adult white-footed mice (peromyscus leucopus).
Photoperiodic regulation of the testes of adult white-footed mice (peromyscus leucopus).
复制标题
成年白足小鼠（peromyscus leucopus）睾丸的光周期调节。
DOI：
10.1095/biolreprod23.4.859
复制
发表时间：
1980
影响因子：
3.6
通讯作者：
Zucker,I
中科院分区：
文献类型：
--
作者：
Johnston,PG;Zucker,I
暴露于短日照（每天10小时的光）12周导致性腺退化，抑制精子发生在mostP。白足;然而，在大约30%的小鼠中，睾丸没有退化，尽管暴露于短光周期20周，精子发生仍得以维持。夹带的昼夜节律的短日照光周期的模式与性腺退化的程度没有相关性。12周后性腺退化的小鼠在短日照治疗30周后表现出睾丸复发和精子发生恢复。自发复发，一个共同的特点，一些光周期啮齿动物，确保活力的生殖系统在早春提前到来的长日。有人建议，复发反映了发展的耐火性的神经内分泌轴松果体antigonadal因素和个人的性腺不倒退，在短时间内是永久性耐火的松果体antigonadal产品。其他的解释也被考虑。
Exposure to short daylengths (10 h of light per day) for 12 weeks caused the gonads to regress and inhibited spermatogesis in mostP. leucopus; however, in approximately 30% of mice the testes did not regress, and spermatogenesis was maintained despite 20 weeks exposure to short photoperiods. The pattern of entrainment of circadian rhythms to the short-day photoperiod did not correlate with the degree of gonadal regression. Mice whose gonads regressed after 12 weeks manifested testicular recrudescence and resumption of spermatogenesis after 30 weeks of short-day treatment. Spontaneous recrudescence, a feature common to a number of photoperiodic rodents, ensures viability of the reproductive system in the early spring in advance of the advent of long days. It is proposed that recrudescence reflects development of refractoriness of the neuroendocrine axis to pineal antigonadal factors and that individuals whose gonads do not regress in short days are permanently refractory to pineal antigonadal products. Other interpretations also are considered.