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BIOCHEMCAL MECHANISM OF THE POSITIVE INOTROPIC EFFECT OF OXYPHENAMONE
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- Author:
- No author available
- Journal Title:
- ACTA PHARMACEUTICA SINICA
- Issue:
- 2
- DOI:
- 10.3321/j.issn:0513-4870.1999.02.003
- Key Word:
- 羟苯氨酮;钠,钾-三磷酸腺苷酶;磷酸二酯酶;钙-三磷酸腺苷酶;环-磷酸腺苷;钙增敏剂
Abstract： 目的:研究羟苯氨酮(oxyphenamone, Oxy)强心作用的生化机理.方法:采用Na+,K+-ATP酶活性和cAMP-PDE活性、肌浆网Ca2+-ATP酶活性和cAMP含量以及心肌肌原纤维Ca2+,Mg2+-ATP酶活性等测定法,研究Oxy对它们的影响,并与milrinone和MCI-154作比较. 结果:Oxy对Na+,K+-ATP酶和PDE无抑制作用,也不影响心肌cAMP含量,但能显著增强心肌肌原纤维对Ca2+的敏感性,高浓度时轻度抑制心肌肌浆网Ca2+-ATP酶活性.结论:Oxy的强心作用方式不同于强心苷、β受体激动剂和PDE抑制剂等强心药,可能为一种新的钙增敏性强心药物.
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