Comparative thyroid development in precocial Japanese quail and altricial ring doves.
Comparative thyroid development in precocial Japanese quail and altricial ring doves.
复制标题
早熟日本鹌鹑和晚熟斑鸠甲状腺发育的比较。
DOI：
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发表时间：
1987
期刊：
影响因子：
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通讯作者：
McNabb Fm
中科院分区：
文献类型：
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作者：
McNabb Fm
本文描述并比较了早熟日本鹌鹑和晚熟环鸽甲状腺的发育模式。甲状腺发育可分为两个阶段：第一阶段的特征是甲状腺功能增加，但甲状腺激素的循环浓度较低;在第二阶段，甲状腺活动进一步增加，并向周围更高水平的甲状腺活动转变。在日本鹌鹑中，第一阶段发生在胚胎生命的后半期，并且从围产期激素峰值开始突然过渡到第二阶段。在环鸽中，第一阶段持续到孵化后的最初几天，然后逐渐过渡到血清激素较高的第二阶段，并持续到约6-8日龄。除了从甲状腺释放激素外，血清结合蛋白和外周组织5 '-单脱碘酶（将甲状腺素转化为三碘甲状腺原氨酸，代谢活性激素）在控制组织甲状腺激素可用性的平衡中发挥作用。外周脱碘酶在激素动力学中的潜在作用进行了讨论，在第一阶段的组织和器官的生长和成熟，并在第二阶段的持续增长与整个生物体的代谢。
The patterns of thyroid development in precocial Japanese quail and altricial Ring doves are described and compared. Thyroid development can be divided into two phases: The first is characterized by increasing functional capacity of the thyroid gland but low circulating concentrations of thyroid hormones; during the second phase there are further increases in thyroid gland activity as well as a shift toward much higher levels of thyroid activity in the periphery. In Japanese quail, the first phase occurs during the latter half of embryonic life, and there is an abrupt transition to the second phase beginning with a perinatal hormone peak. In Ring doves the first phase continues into the first few days of the posthatching period, and the transition to the second phase of higher serum hormones is gradual and lasts until about 6-8 days of age. In addition to the release of hormones from the thyroid gland, serum binding proteins and peripheral tissue 5'-monodeiodinase (which converts thyroxine to triiodothyronine, the metabolically active hormone) play roles in controlling the balance of thyroid hormone availability to the tissues. The potential roles of peripheral deiodinases in hormone dynamics are discussed in relation to tissue and organ growth and maturation during the first phase and in relation to whole organism metabolism with continued growth during the second phase.