Abstract:
:We have reported that dietary long-chain triacylglycerols (LCT) enhance the transcription of cellular retinol-binding protein, the type II (CRBPII) gene, and the liver-type fatty acid-binding protein (L-FABP) gene in the small intestine. Because the cis elements on the CRBPII gene consisting of two AGGTCA motifs separated by a single nucleotide are known to bind not only the 9-cis-retinoic acid receptor (RXR) homodimer, but also the peroxisome proliferator-activated receptor (PPAR)-RXR heterodimer, it has been implicated that the unsaturated long-chain fatty acids, as the ligands of the PPAR, might activate the transcription of the CRBPII gene, thereby making use of the RXR-response elements (RXRE and RE3) as the PPAR-response element (PPRE). In this study, we found that the PPARalpha mRNA level in the rat jejunum was elevated by dietary fat, whereas the PPARdelta mRNA level was reduced under this condition. Electrophoretic mobility-shift assay revealed that both PPARalpha-RXRalpha and PPARdelta-RXRalpha heterodimers, specifically and in a dose-dependent manner, bound to the two PPRE-like elements of the rat CRBPII gene as well as the known PPREs in the L-FABP and acyl-CoA oxidase genes. The binding of the PPARalpha-RXRalpha heterodimer to the CRBPII-RXRE, the CRBPII-RE3, and the PPREs of L-FABP, HMG-CoA synthase, and acyl-CoA oxidase was gradually diminished by the addition of increasing amounts of PPARdelta. The binding of the PPARdelta-RXRalpha heterodimer to CRBPII-RXRE, CRBPII-RE3, and other PPREs was also gradually reduced by the addition of increasing amounts of PPARalpha. Using Escherichia coli-expressed RXRalpha, we showed that the mutual competition for RXRalpha with PPARalpha and PPARdelta occurred at the protein level. These results suggest that the transcriptions of CRBPII, L-FABP, and the other PPAR-dependent genes in the small intestine may be coordinately regulated by the disproportional expression of PPARalpha and PPARdelta.
journal_name
Arch Biochem Biophysjournal_title
Archives of biochemistry and biophysicsauthors
Mochizuki K,Suruga K,Kitagawa M,Takase S,Goda Tdoi
10.1006/abbi.2001.2305subject
Has Abstractpub_date
2001-05-01 00:00:00pages
41-8issue
1eissn
0003-9861issn
1096-0384pii
S0003-9861(01)92305-7journal_volume
389pub_type
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journal_title:Archives of biochemistry and biophysics
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pub_type: 杂志文章
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journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
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journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/0003-9861(88)90101-4
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更新日期:2015-04-15 00:00:00
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pub_type: 杂志文章
doi:10.1006/abbi.1998.0894
更新日期:1998-11-01 00:00:00
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pub_type: 杂志文章
doi:10.1006/abbi.1996.0370
更新日期:1996-09-01 00:00:00
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journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/0003-9861(88)90380-3
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journal_title:Archives of biochemistry and biophysics
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doi:10.1016/0003-9861(87)90299-2
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journal_title:Archives of biochemistry and biophysics
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journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/0003-9861(89)90503-1
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pub_type: 杂志文章,评审
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journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/j.abb.2011.09.008
更新日期:2011-12-01 00:00:00
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journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1006/abbi.1995.1041
更新日期:1995-01-10 00:00:00
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journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/0003-9861(83)90413-7
更新日期:1983-01-01 00:00:00
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journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/0003-9861(92)90014-n
更新日期:1992-02-01 00:00:00
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journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
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更新日期:1988-03-01 00:00:00
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journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/j.abb.2014.01.007
更新日期:2014-03-01 00:00:00
abstract::Cytochromes P450 are enzymes that catalyse the oxidation of a wide variety of compounds that range from small volatile compounds, such as monoterpenes to larger compounds like steroids. These enzymes can be modified to selectively oxidise substrates of interest, thereby making them attractive for applications in the b...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/j.abb.2019.07.025
更新日期:2019-09-15 00:00:00