A novel mutation in the cytochrome P450(27) (CYP27) gene caused cerebrotendinous xanthomatosis in a Japanese family

作者：Okuyama E; Tomita S; Takeuchi H; Ichikawa Y

来源：The Journal of Lipid Research, 1996, 37(3): 631-639.

• cerebrotendinous xanthomatosis (CTX)
• cytochrome P450(27)
• cholestanol
• sterol 27-monooxygenase
• mitochondrial cytochrome P450
• single-strand conformation polymorphism

Cerebrotendinous xanthomatosis (CTX) is an autosomal recessive lipid storage disease caused by mutations in the cytochrome P450(27) (CYP27) gene. This disease is characterized by the accumulation of a bile alcohol, cholestanol, in diverse tissues. Accumulation in the central nervous system leads to neurological dysfunction including dementia, spinal cord paresis, and cerebellar ataxia. Accumulation in other tissues causes tendon xanthomas, premature atherosclerosis, and cataracts. In a Japanese family with CTX, we identified two point mutations in the CYP27 gene at different sites. One is a novel transversion, which substitutes G for C at Pro(368) (CCC) to Arg (CGC). The other is a transition, which substitutes A for G at Arg(441) (CGG) to Gln (CAG), this being the same mutation that Kim et al, reported (1994. J. Lipid Res. 35: 1031-1039). Allele-specific polymerase chain reaction analysis indicated that the father and mother of this family, who themselves had no clinical manifestations of CTX. had the former and latter mutations heterozygously, respectively. On the other hand, the patients each had both mutations heterozygously. These results are highly suggestive, but not conclusive, that the newly identified transversion in the CYP27 gene accounts for the sterol 27-hydroxylase (EC 1.14.13.15) deficiency in these patients.

• 出版日期1996-3