Increased erythropoietin secretion in human hepatoma cells by N6-cyclohexyladenosine.

Increased erythropoietin secretion in human hepatoma cells by N6-cyclohexyladenosine.
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N6-环己基腺苷增加人肝癌细胞中促红细胞生成素的分泌。

DOI:
10.1152/ajpcell.1991.261.3.c455
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发表时间:
1991
期刊:
The American journal of physiology
影响因子:
--
通讯作者:
J. Fisher
J. Fisher
中科院分区:
--
文献类型:
--
作者:
J. Nakashima;J. Brookins;B. Beckman;J. Fisher

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本研究旨在探讨腺苷类似物N6-环己基腺苷(CHA)对肝癌细胞(Hep 3B)促红细胞生成素(Ep)分泌的直接影响。在低氧条件下(1%O2),用浓度为10(-5)和5 × 10(-5)M的CHA处理低密度Hep 3B细胞20 h,其培养液中Ep水平明显高于低氧对照组。此外,在缺氧条件下孵育1小时后,与缺氧对照组相比,相同浓度的CHA使Hep 3B细胞中腺苷3 ',5'-环磷酸(cAMP)水平显著增加。与对照缺氧细胞相比,双丁酰cAMP(10(-5),10(-4)M)也引起Ep分泌的显著增加。腺苷受体拮抗剂8-苯基茶碱(8-phenyltheophylline)可明显抑制CHA对缺氧时Hep 3B细胞Ep分泌和cAMP积累的刺激作用。这些数据表明,Ep的分泌可能受到腺苷受体偶联激活腺苷酸环化酶和cAMP的产生。
The present studies were undertaken to assess the direct effects of N6-cyclohexyladenosine (CHA), a stable adenosine analogue, on erythropoietin (Ep) secretion in hepatocellular carcinoma cells (Hep 3B). Ep levels in the medium of low density Hep 3B cells treated with CHA in concentrations of 10(-5) and 5 x 10(-5) M for 20 h under hypoxic conditions (1% O2) were significantly higher than that of hypoxic controls. In addition, CHA at the same concentrations produced significant increases in adenosine 3',5'-cyclic monophosphate (cAMP) levels in Hep 3B cells after 1-h incubation under hypoxic conditions when compared with hypoxic controls. Dibutyryl cAMP (10(-5), 10(-4) M) also caused significant increases in Ep secretion when compared with control hypoxic cells. On the other hand, 8-phenyltheophylline, an adenosine receptor antagonist, significantly inhibited the stimulatory effects of CHA on both Ep secretion and cAMP accumulation in the Hep 3B cell cultures in response to hypoxia. These data suggest that Ep secretion may be regulated by adenosine receptor-coupled activation of adenylyl cyclase and the generation of cAMP.
前列环素 (PGI2) 及其代谢物 6-酮前列腺素 (PG)E1 的红细胞生成作用。
DOI: --
发表时间: 1983
期刊: The Journal of pharmacology and experimental therapeutics
影响因子: --
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促红细胞生成素的放射免疫测定:正常人体和造血障碍患者的血清水平。
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腺苷对支持细胞中激素反应的抑制可被百日咳毒素逆转。
DOI: 10.1210/endo-122-6-2692
发表时间: 1988
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