(nHL-60) cells activated with PMA were cultured in the FBS-free medium containing cholesterol, significantly increased levels of secosterol-A and its aldehyde-oxidation product, but not secosterol-B, were formed. This secosterol-A formation was decreased in the culture of PMA-activated nHL-60 cells containing several reactive oxygen species (ROS) inhibitors and scavengers or in the culture of PMA-activated
3β-Hydroxy-5-oxo-5,6-secocholestan-6-al (secosterol-A) 及其醛缩产物 3β-hydroxy-5β-hydroxy-B-norcholestane-6β-carboxaldehyde (secosterol-B) 最近在人类动脉粥样硬化组织和脑标本,它们可能在动脉粥样硬化和神经退行性疾病的发病机制中起关键作用。然而,由于它们的起源仍未确定,我们在体外和体内检查了 secosterols 的形成机制、稳定性和命运。在不含 FBS 的
培养基中培养 3 小时后,大约 40% 的 secosterol-A 保持不变,而 20% 和 40% 转化为其醛氧化产物,3β-羟基-5-氧代-secocholestan-6-oic 酸,和secosterol-B,分别。在 FBS 存在下,几乎所有的癸
甾醇-A 都会立即转化为这些化合物。
培养基中的二
甾醇-B,有和没有