Differential effects of placental lactogen, growth hormone and prolactin on rat liver ornithine decarboxylase activity in the perinatal period.

Differential effects of placental lactogen, growth hormone and prolactin on rat liver ornithine decarboxylase activity in the perinatal period.
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胎盘催乳素、生长激素和催乳素对围产期大鼠肝脏鸟氨酸脱羧酶活性的差异影响。

DOI:
10.1016/0024-3205(80)90394-x
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发表时间:
1980
期刊:
影响因子:
6.1
通讯作者:
Handwerger,S
Handwerger,S
中科院分区:
医学2区
文献类型:
--
作者:
Hurley,TW;Kuhn,CM;Schanberg,SM;Handwerger,S

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摘要 绵羊胎盘催乳素(oPL)、绵羊生长激素(oGH)和绵羊催乳素(oPRL)在妊娠后期的胎儿循环中以高浓度存在。为了确定这些激素是否刺激鸟氨酸脱羧酶 (ODC)(一种广泛参与细胞生长控制的酶)的活性,在子宫内向大鼠胎儿注射 100 μg oPL、oGH、oPRL、大鼠生长激素 (rGH) 或大鼠催乳素 (rPRL),并在注射后 2、4 和 6 小时测量胎儿肝脏、心脏和大脑中的 ODC 活性。与单独注射缓冲液的同窝小鼠相比,OPL 刺激胎儿肝脏 ODC 活性达 282±45%(平均值±SEM),但 oGH、oPRL、rGH 和 rPRL 对胎儿肝脏 ODC 活性没有影响。然而,在 24-48 小时龄的新生大鼠中,所有五种激素均显着增加肝脏 ODC 活性。胎儿和新生儿心脏和大脑中的 ODC 活性不受五种激素中任何一种的影响。在其他实验中,50 μg oPL 显着刺激胎儿肝脏 ODC 活性,而 250 μg oGH 则没有效果。然而,25 μg oGH 显着刺激幼鼠出生后 1-2 天的肝脏 ODC 活性。这些结果表明,oPL 通过刺激 ODC 活性,对胎儿具有促生长作用,并且大鼠肝脏 ODC 活性在围产期对生长激素和催乳素产生反应。
Abstract Ovine placental lactogen,(oPL), ovine growth hormone,(oGH), and ovine prolactin,(oPRL) are present in high concentrations in the fetal circulation late in gestation. To determine if these hormones stimulate the activity of ornithine decarboxylase (ODC), an enzyme widely implicated in the control of cellular growth, rat fetuses were injected in utero with 100 μg of oPL, oGH, oPRL, rat growth hormone (rGH) or rat prolactin (rPRL) and ODC activity in the livers, hearts, and brains of the fetuses was measured 2, 4, and 6 hours after injection. OPL stimulated fetal liver ODC activity by 282±45%(mean±SEM) as compared to litter mates injected with buffer alone but oGH, oPRL, rGH and rPRL had no effect on fetal liver ODC activity. However, in neonatal rats 24–48 hours old all five hormones significantly increased liver ODC activity. ODC activities in the hearts and brains of the fetuses and neonates were unaffected by any of the five hormones. In other experiments 50 μg of oPL significantly stimulated fetal liver ODC activity while 250 μg of oGH were without effect. However 25 μg of oGH significantly stimulated liver ODC activity in rat pups 1–2 days after birth. These results suggest that oPL, by its stimulation of ODC activity, has somatotropic effects in the fetus and that rat liver ODC activity becomes responsive to growth hormone and prolactin in the perinatal period.
羊胎盘催乳素刺激新生大鼠脑和肝中鸟氨酸脱羧酶活性。
DOI: 10.1016/0024-3205(78)90450-2
发表时间: 1978
期刊: Life sciences
影响因子: 6.1
作者:
Stephen R. Butler;Thomas Hurley;Saul M. Schanberg;Stuart Handwerger
通讯作者: Stuart Handwerger
正常和肿瘤生长中的多胺
DOI: 10.1038/bjc.1976.55
发表时间: 1976
影响因子: 8.8
作者:
B. Reviews;G. Murphy;Arnold Mittel;P. J. O 'connor
通讯作者: P. J. O 'connor
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DOI: --
发表时间: 1968
影响因子: 4.1
作者:
A. Pegg;H. G. Williams
通讯作者: H. G. Williams
DOI: --
发表时间: 1979
期刊: Endocrinology
影响因子: 4.8
作者:
P. Gluckman;P. L. Mueller;S. Kaplan;A. Rudolph;M. Grumbach
通讯作者: M. Grumbach
DOI: 10.1677/joe.0.0480251
发表时间: 1970
期刊: The Journal of endocrinology
影响因子: --
作者:
J. Bassett;G. Thorburn;A. Wallace
通讯作者: A. Wallace