Baicalein 5,6,7-trimethyl ether activates peroxisomal but not mitochondrial fatty acid beta-oxidation.

Abstract:

:Recently, we reported that baicalein 5,6,7-trimethyl ether (BTM), a flavonoid, is capable of activating fatty acid beta-oxidation in X-linked adrenoleukodystrophy (X-ALD) fibroblasts (FEBS Lett. 2005; 579: 409-414). The objective of this study was to clarify whether BTM activates peroxisomal and/or mitochondrial fatty acid beta-oxidation. We first analysed the effect of BTM on fatty acid beta-oxidation in fibroblasts derived from healthy controls as well as patients with X-ALD, mitochondrial carnitine-acylcarnitine translocase (CACT) deficiency, and peroxisome biogenesis disorder, Zellweger syndrome. Lignoceric acid (C(24:0)) beta-oxidation in the fibroblasts was stimulated by treatment with BTM, except for Zellweger fibroblasts. In contrasts, palmitic acid (C(16:0)) beta-oxidation was increased (2.8-fold) only in CACT-deficient fibroblasts. In U87 glioblastoma cells, C(24:0) beta-oxidation was also activated by treatment with BTM but C(16:0) beta-oxidation was not. The C(16:0) beta-oxidation was, however, significantly increased in the presence of 2-[5-(4-chlorophenyl)pentyl]oxirane-2-carboxylate (POCA), a carnitine palmitoyltransferase I inhibitor. These results indicate that BTM activates peroxisomal but not mitochondrial fatty acid beta-oxidation. In addition, we found that BTM did not upregulate the expression of ABCD2/ALDR, ABCD3/PMP70, ACOX1 and FATP4 genes but slightly increased ACSVL1 gene expression.

journal_name

J Inherit Metab Dis

authors

Morita M,Kanai M,Mizuno S,Iwashima M,Hayashi T,Shimozawa N,Suzuki Y,Imanaka T

doi

10.1007/s10545-008-0857-2

subject

Has Abstract

pub_date

2008-06-01 00:00:00

pages

442-9

issue

3

eissn

0141-8955

issn

1573-2665

journal_volume

31

pub_type

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