首页> 外文期刊>American Journal of Physiology >Adenosine A(2A) and A(2B) receptor activation of erythropoietin production.
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Adenosine A(2A) and A(2B) receptor activation of erythropoietin production.

机译:促红细胞生成素产生的腺苷A(2A)和A(2B)受体激活。

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摘要

We have examined the effects of adenosine receptors and protein kinases A and C in the regulation of erythropoietin (Epo) production using hepatocellular carcinoma (Hep3B) cells in culture and in vivo in normal mice under normoxic and hypoxic conditions. CGS-21680, a selective adenosine A(2A) agonist, significantly increased levels of Epo in normoxic Hep3B cell cultures and in serum of normal mice under both normoxic and hypoxic conditions. CGS-21680 also produced a significant increase in Epo mRNA levels in Hep3B cell cultures. SCH-58261, a selective adenosine A(2A) receptor antagonist, significantly inhibited the increase in medium levels of Epo in Hep3B cell cultures exposed to hypoxia (1% O(2)). Enprofylline, a selective adenosine A(2B) receptor antagonist, significantly inhibited the increase in plasma levels of Epo in normal mice exposed to hypoxia. Chelerythrine chloride, an antagonist of protein kinase C activation, significantly inhibited hypoxia-induced increases in serum levels of Epo in normal mice. A model is presented for adenosine in hypoxic regulation of Epo production that involves kinases A and C and phospholipase A(2) pathways.
机译:我们已经研究了在正常氧和低氧条件下正常小鼠体内培养和体内使用肝细胞癌(Hep3B)细胞时,腺苷受体和蛋白激酶A和C在调节促红细胞生成素(Epo)生产中的作用。 CGS-21680,一种选择性的腺苷A(2A)激动剂,在常氧和低氧条件下,常氧Hep3B细胞培养物中和正常小鼠血清中Epo的水平均显着增加。 CGS-21680在Hep3B细胞培养物中的Epo mRNA水平也显着增加。 SCH-58261,一种选择性的腺苷A(2A)受体拮抗剂,显着抑制暴露于低氧(1%O(2))的Hep3B细胞培养物中Epo的中等水平的增加。 Enprofylline,一种选择性的腺苷A(2B)受体拮抗剂,可显着抑制暴露于低氧的正常小鼠血浆Epo的水平升高。氯化赤霉素,是蛋白激酶C激活的拮抗剂,能显着抑制正常小鼠低氧诱导的Epo血清水平升高。提出了一个低氧调节Epo产生的腺苷模型,涉及激酶A和C和磷脂酶A(2)途径。

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