Regulation of calcitonin gene transcription by vitamin D metabolites in vivo in the rat.

Regulation of calcitonin gene transcription by vitamin D metabolites in vivo in the rat.
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大鼠体内维生素 D 代谢物对降钙素基因转录的调节。

DOI:
10.1172/jci113305
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发表时间:
1988
期刊:
The Journal of clinical investigation
影响因子:
--
通讯作者:
J. Silver
J. Silver
中科院分区:
--
文献类型:
--
作者:
T. Naveh;J. Silver

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降钙素是由甲状腺C细胞分泌的,以响应血清钙的升高,并作用于骨骼以降低血清钙。C细胞对维生素D3的二羟基代谢物1,25(OH)2D 3具有特异性受体。此外,降钙素刺激肾脏中1,25(OH)2D 3的合成。甲状旁腺激素(PTH)是第三种促钙激素,也对肾脏合成1,25(OH)2D 3有营养作用,反过来1,25(OH)2D 3抑制PTH基因的转录和合成。我们在这里报告显着抑制降钙素基因转录的生理相关剂量的1,25(OH)2D 3注射到正常大鼠,不提高血清钙。100 pmol 1,25(OH)2D 3给药后,降钙素mRNA水平在6 h时降至基础水平的6%,在48 h时降至基础水平的4%,即使在12.5 pmol 1,25(OH)2D 3给药后,剂量反应也显示出显著效应,较大剂量(高达200 pmol)的效应没有明显增加。对照基因,肌动蛋白,甲状腺球蛋白(甲状腺滤泡细胞),生长抑素(甲状腺C细胞)不受1,25(OH)2D 3。凝胶印迹显示,1,25(OH)2D 3降低降钙素mRNA水平,但其大小无任何变化。体外核转录结果显示,1,25(OH)2D 3处理组(100 pmol)大鼠降钙素转录水平为对照组的10%,甲状腺球蛋白和肌动蛋白转录水平为对照组的100%。我们认为钙是PTH和降钙素分泌的主要调节因子,而1,25(OH)2D 3是PTH和降钙素基因转录的重要调节因子。我们认为这是首次证明1,25(OH)2D 3对C细胞的作用,从而建立了维生素D的新靶器官和作用部位。降钙素对1,25(OH)2D 3合成有营养作用,1,25(OH)2D 3合成反过来抑制降钙素合成,降钙素合成是新的内分泌反馈回路的组分。
Calcitonin is secreted by the C cells of the thyroid in response to a raised serum calcium, and acts on bone to lower serum calcium. The C cells have specific receptors for the dihydroxymetabolite of vitamin D3, 1,25(OH)2D3. Moreover, calcitonin stimulates the synthesis of 1,25(OH)2D3 in the kidney. Parathyroid hormone (PTH), the third calciotrophic hormone, is also trophic to the renal synthesis of 1,25(OH)2D3, and in turn 1,25(OH)2D3 inhibits PTH gene transcription and synthesis. We report here the marked inhibition of calcitonin gene transcription by the injection of physiologically relevant doses of 1,25(OH)2D3 to normal rats that did not raise serum calcium. Calcitonin mRNA levels after 100 pmol 1,25(OH)2D3 decreased to 6% of basal at 6 h and 4% at 48 h, and a dose response showed a marked effect even after 12.5 pmol 1,25(OH)2D3, with no appreciably greater effect with larger doses (up to 200 pmol). Control genes, actin, thyroglobulin (thyroid follicular cells), somatostatin (thyroid C-cells) were not affected by 1,25(OH)2D3. Gel blots showed that 1,25(OH)2D3 decreased calcitonin mRNA levels without any change in its size. In vitro nuclear transcription showed that 1,25(OH)2D3-treated (100 pmol) rats' calcitonin transcription was 10% of control, while thyroglobulin and actin were 100%. We propose that calcium is the major regulator of PTH and calcitonin secretion, while 1,25(OH)2D3 is an important regulator of PTH and calcitonin gene transcription. We believe this to be the first demonstration of an effect of 1,25(OH)2D3 on the C cells thereby establishing a new target organ and site of action of vitamin D. Calcitonin is trophic to 1,25(OH)2D3 synthesis, which in turn inhibits calcitonin synthesis, which are the components of a new endocrinological feedback loop.
大鼠降钙素 mRNA 的表征。
DOI: 10.1073/pnas.77.8.4444
发表时间: 1980
影响因子: 11.1
作者:
Amara,SG;David,DN;Rosenfeld,MG;Roos,BA;Evans,RM
通讯作者: Evans,RM
GH4C1 细胞中 1,25-二羟基维生素 D3 对催乳素 mRNA 的调节。
DOI: --
发表时间: 1983
期刊: The Journal of biological chemistry
影响因子: --
作者:
Wark,JD;TashjianJr,AH
通讯作者: TashjianJr,AH
家族性甲状腺髓样癌和C细胞增生。
DOI: 10.1016/s0300-595x(81)80027-8
发表时间: 1981
期刊: Clinics in endocrinology and metabolism
影响因子: --
作者:
Wolfe,HJ;Delellis,RA
通讯作者: Delellis,RA
大鼠甲状腺中降钙素信使核糖核酸的表征和定位。
DOI: 10.1210/endo-113-5-1616
发表时间: 1983
期刊: Endocrinology
影响因子: 4.8
作者:
Jacobs,JW;Simpson,E;Penschow,J;Hudson,P;Coghlan,J;Niall,H
通讯作者: Niall,H
有证据表明降钙素可刺激体内 1,25-二羟基维生素 D 的产生和肠道对钙的吸收。
DOI: 10.1172/jci112597
发表时间: 1986
期刊: The Journal of clinical investigation
影响因子: --
作者:
Jaeger,P;Jones,W;Clemens,TL;Hayslett,JP
通讯作者: Hayslett,JP