J. Biochem, 1984, Vol. 96, No. 4 1241-1247
© 1984 Japanese Biochemical Society
research-article |
Fatty Acid Elongation Activity in Fibroblasts from Patients with Adrenoleukodystrophy (ALD)1
*Metabolism Section, The Tokyo Metropolitan Institute of Medical Science, Honkomagome 3-chome Bunkyo-ku, Tokyo 113
**Department of Neurology, Brain Research Institute, Niigata University Asahimachi-dori 1, Niigata, Niigata 951
4To whom all correspondence should be addressed.
The activities of microsomal fatty acidelongation and cytoplasmic de novo fatty acid synthesis were measured in human cultured skin fibroblasts. Both activities in fibroblasts from normal controls and patients with adrenoleukodystrophy (ALD) were compared and slight but a significant increase of elongation activities in ALD fibroblasts was demonstrated. On the other hand, there were no significant differences in the fatty acid synthetase activities. In this study, we measured microsomal fatty acid elongation activities in the presence of N-ethylmaleimide, which completely inhibited the activity of contaminating fatty acid synthetase and also the degradation of fatty acids, and made accurate determination of the elongation activities possible.
1This work was supported in part by Grants-in-Aid for Scientific Research from the Ministry of Education, Science and Culture of Japan.
2Clinical Investigation and Therapeutics Section, NIH, Bethesda, ML 20205, U.S.A.
3Department of Neurology, Brain Research Institute, Niigata University, Niigata
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