Javitt N B, Kok E, Cohen B, Burstein S
J Lipid Res. 1982 May;23(4):627-30.
Serum 26-hydroxycholesterol was quantitated by isotope dilution-mass spectrometry in normal individuals and in patients with cerebrotendinous xanthomatosis. In the normal individuals, the concentration of 26-hydroxycholesterol in serum ranged from 4.3 to 13.0 microgram/100 ml. In five patients with CTX, 26-hydroxycholesterol in serum ranged from 0 to 0.6 microgram/100 ml. The findings can be explained by reduced or absent mitochondrial C27 steroid 26-hydroxylase activity. The method is useful for detection of CTX and perhaps other disturbances of sterol and bite acid metabolism.
采用同位素稀释-质谱分析法对正常人和脑腱性黄瘤病患者的血清26-羟基胆固醇进行定量分析。在正常个体中,血清26-羟基胆固醇浓度范围为4.3至13.0微克/100毫升。在5例脑腱性黄瘤病患者中,血清26-羟基胆固醇浓度范围为0至0.6微克/100毫升。这些发现可以通过线粒体C27类固醇26-羟化酶活性降低或缺乏来解释。该方法有助于检测脑腱性黄瘤病以及可能存在的其他固醇和胆汁酸代谢紊乱。