Abstract
To gain insight into the function of peroxisome proliferator-activated receptor (PPAR) isoforms in mammals, we have cloned and characterized two PPAR alpha-related cDNAs (designated PPAR gamma and -delta, respectively) from mouse. The three PPAR isoforms display widely divergent patterns of expression during embryogenesis and in the adult. Surprisingly, PPAR gamma and -delta are not activated by pirinixic acid (Wy 14,643), a potent peroxisome proliferator and activator of PPAR alpha. However, PPAR gamma and -delta are activated by the structurally distinct peroxisome proliferator LY-171883 and linoleic acid, respectively, indicating that each of the isoforms can act as a regulated activator of transcription. These data suggest that tissue-specific responsiveness to peroxisome proliferators, including certain fatty acids, is in part a consequence of differential expression of multiple, pharmacologically distinct PPAR isoforms.
MeSH Terms
Acetophenones/pharmacology
Aging/metabolism
Amino Acid Sequence
Animals
Base Sequence
Blotting, Northern
Cloning, Molecular
DNA
Embryo, Mammalian/metabolism
Linoleic Acid
Linoleic Acids/pharmacology
Mice
Molecular Sequence Data
Receptors, Cytoplasmic and Nuclear/genetics,metabolism
Tetrazoles/pharmacology
Transcription Factors/genetics,metabolism
Chemicals
Acetophenones
Linoleic Acids
Receptors, Cytoplasmic and Nuclear
Tetrazoles
Transcription Factors
LY 171883
DNA
Linoleic Acid
Authors & Affiliations
8 authors, click to expand affiliations / ORCID
Kliewer S A
Salk Institute for Biological Studies, La Jolla, CA.
Forman B M
Blumberg B
Ong E S
Borgmeyer U
Mangelsdorf D J
Umesono K
Evans R M
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