Hepatic conversion of thyroxine to triiodothyronine in obese and lean Zucker rats.

Hepatic conversion of thyroxine to triiodothyronine in obese and lean Zucker rats.
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肥胖和瘦 Zucker 大鼠中甲状腺素的肝脏转化为三碘甲状腺原氨酸。

DOI:
10.1016/0024-3205(84)90579-4
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发表时间:
1984
期刊:
影响因子:
6.1
通讯作者:
Braverman,LE
Braverman,LE
中科院分区:
医学2区
文献类型:
--
作者:
Young,RA;Fang,SL;Prosky,J;Braverman,LE

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在体外转化的甲状腺素(T4)三碘甲状腺原氨酸(T3)进行了研究,在肝脏匀浆从喂养和禁食瘦和肥胖Zucker大鼠。T3代减少喂养年轻(2个月)肥胖大鼠相比,在喂养瘦对照值。添加二硫苏糖醇(DTT)不能纠正这一点,表明肥胖大鼠中5 '-脱碘酶活性缺乏。瘦和肥胖的2月龄大鼠对2天禁食的反应是减少肝脏T3的产生,这在其他品系的大鼠中总是观察到的。与年龄匹配的瘦对照组相比,老年(5个月)喂养的肥胖大鼠的肝转化率没有降低。禁食4天的5月龄瘦Zucker大鼠肝脏T4向T3的转化率明显降低。相反,禁食4天对5月龄肥胖大鼠的肝转化率没有影响。在禁食长达28天的5月龄肥胖大鼠中评估肝转化率,并且肝转化仍然没有降低。5月龄肥胖大鼠的这种反常反应可能为进一步评价T4对肝脏T3生成的控制提供了一个新的模型。
The in vitro conversion of thyroxine (T4) to triidothyronine (T3) was studied in liver homogenates from fed and fasted lean and obese Zucker rats. T3generation was decreased in fed young (2 month) obese rats as compared to values in fed lean controls. This was not corrected by the addition of dithiothreitol (DTT), suggesting a deficiency in 5'-deiodinase activity in y oung obese rats. Both lean and obese 2 month old rats responded to a 2 day fast by decreasing hepatic T3generation as is always observed in other strains of rats. The hepatic conversion rate was not decreased in older (5 month) fed obese rats when compared to age-matched lean controls. Hepatic conversion of T4to T3was markedly decreased in 5 month old lean Zucker rats fasted for 4 days. In contrast, a 4 day fast had no effect on the hepatic conversion rate in the 5 month old obese rats. The hepatic conversion rate was assessed in 5 month old obese rats fasted for up to 28 days and hepatic conversion still did not decrease. This paradoxical response of the 5 month old obese rat may provide a new model to further evaluate the control of hepatic T3generation from T4.
巯基对甲状腺功能减退、饥饿、胎儿和新生啮齿动物肝脏从甲状腺素生成 3,3,5-三碘甲状腺原氨酸受损的作用。
DOI: 10.1172/jci109330
发表时间: 1979
期刊: The Journal of clinical investigation
影响因子: --
作者:
A. Harris;S. Fang;L. Hinerfeld;L. Braverman;A. Vagenakis
通讯作者: A. Vagenakis
遗传性肥胖大鼠的促甲状腺素分泌。
DOI: 10.1210/endo-90-1-67
发表时间: 1972
期刊: Endocrinology
影响因子: 4.8
作者:
D. York;J. Hershman;R. Utiger;G. Bray
通讯作者: G. Bray
大鼠体内 L-甲状腺素甲状腺外转化为 3,5,3-三碘-L-甲状腺氨酸的定量。
DOI: --
发表时间: 1971
影响因子: 15.9
作者:
H. L. Schwartz;M. Surks;J. Oppenheimer
通讯作者: J. Oppenheimer
DOI: 10.1210/endo-90-5-1320
发表时间: 1972-01-01
期刊: ENDOCRINOLOGY
影响因子: 4.8
作者:
ZUCKER, LM;ANTONIADES, HN
通讯作者: ANTONIADES, HN
饥饿、营养替代和甲状腺功能减退对大鼠体外肝 T4 至 T3 转化的影响。
DOI: --
发表时间: 1978
期刊: Metabolism: Clinical and Experimental
影响因子: --
作者:
A. Harris;Shih;Apostolos G. Vagenakis;Lewis E. Bravernan
通讯作者: Lewis E. Bravernan