概括
研究人员研究了激素释放激素 (TRH) 的体外生物合成. 他们发现,氨酸,氨酸和氨酸是大鼠下丘脑碎片中TRH合成的关键前体.
科学领域:
- 神经内分泌学神经内分泌学
- 生物化学 生物化学
- 分子生物学分子生物学
背景情况:
- 甲状腺激素释放激素 (TRH) 是一种三,调节甲状腺刺激激素的分泌.
- 了解TRH生物合成对于理解下丘脑-垂体-甲状腺轴的功能至关重要.
研究的目的:
- 为了研究激素释放激素 (TRH) 在大鼠下丘脑组织中的体外生物合成.
- 为了确定涉及TRH合成的特定氨基酸前体.
主要方法:
- 用放射性标记的氨基酸 (proline,histidine,glutamic acid) 在克雷布斯-林格二碳酸盐缓冲器中化大鼠下垂体碎片.
- 使用薄层染色学,纸张电泳和离子交换染色学分析合成的.
- 使用合成TRH和放射性标记TRH作为检测标记.
主要成果:
- 氨酸,氨酸和谷氨酸一直被纳入TRH区域内的.
- 生物合成活动局限于茎中部突出部,腹下垂体和背下垂体.
- 在神经叶或大脑皮层中没有检测到显著的TRH合成.
结论:
- 鼠 TRH 生物合成可能涉及直接结合的 林,胺和谷氨酸.
- 合成的TRH与L-pyroglutamyl-L-histidyl-L-proline胺具有相同的特性.
- 鼠TRH可能与牛和猪TRH相似或相同,在组织中以pyroglutamyl形式存在.
相关概念视频
01:19Regulation of Hormone Secretion
Regulation of hormone secretion is a finely tuned orchestration driven by various types of stimuli, encompassing neural, humoral, and hormonal signals. Environmental cues instigate neural stimuli, where action potentials traverse nerve fibers to reach their designated targets. An illustrative scenario is the body's response to stress, wherein the sympathetic nervous system releases epinephrine from the adrenal glands, inducing the well-known 'fight or flight' reaction.
Humoral stimuli,...
Humoral stimuli,...
01:20Synthesis and Regulation of Thyroid Hormones
Low blood levels of the thyroid hormones — triiodothyronine (T3) and thyroxine (T4) — signal the hypothalamus to release the thyrotropin-releasing hormone (TRH). TRH then reaches the pituitary gland and stimulates the release of thyroid-stimulating hormone(TSH) into the bloodstream.
Upon reaching the thyroid gland, TSH stimulates the follicular cells' active uptake of iodide ions from the blood. The ions diffuse to the apical surface of the cells and are oxidized to iodine. The iodine is then...
Upon reaching the thyroid gland, TSH stimulates the follicular cells' active uptake of iodide ions from the blood. The ions diffuse to the apical surface of the cells and are oxidized to iodine. The iodine is then...