Androgen receptor-Ets protein interaction is a novel mechanism for steroid hormone-mediated down-modulation of matrix metalloproteinase expression.
Matrix metalloproteinases belong to a family of structurally related enzymes that plays important role in tissue morphogenesis, differentiation, and wound healing. Their expression is negatively regulated by several members of the steroid hormone receptor family. This is thought to occur through interaction of the steroid receptors with the transcription factor AP-1 that is otherwise required for positive regulation. Here, we demonstrate that AP-1 is not always a target for down-regulation of expression of matrix metalloproteinases by steroid receptors. Androgen receptor negatively regulates matrix metalloproteinase-1 expression not through AP-1 but through a family of Ets-related transcription factors that are also required for positive regulation. This negative regulation is specific for the androgen receptor. It does not require the DNA binding activity but needs amino-terminal sequences of the receptor. These results identify a novel regulatory pathway for negative regulation utilized by a member of the steroid hormone receptor family for down-regulating the expression of matrix metalloproteinases.
Schneikert
J
J
Forschungszentrum Karlsruhe, Institute of Genetics, P.O. Box 3640, D-76021 Karlsruhe, Federal Republic of Germany.
Peterziel
H
H
Defossez
P A
PA
Klocker
H
H
de Launoit
Y
Y
Cato
A C
AC
D000728:Androgens / Q000494:pharmacology*; D000818:Animals; D017364:Collagenases / Q000235:genetics*; D004268:DNA-Binding Proteins / Q000378:metabolism* / Q000502:physiology; D015536:Down-Regulation; D006801:Humans; D020781:Matrix Metalloproteinase 1; D019278:Matrix Metalloproteinase 3 / Q000235:genetics*; D020783:Matrix Metalloproteinase 7; D008666:Metalloendopeptidases / Q000235:genetics*; D011401:Promoter Regions, Genetic; D011944:Receptors, Androgen / Q000502:physiology*; D013329:Structure-Activity Relationship; D018808:Transcription Factor AP-1 / Q000502:physiology; D014157:Transcription Factors / Q000378:metabolism*
D000728:Androgens; D004268:DNA-Binding Proteins; C086680:ETV5 protein, human; D011944:Receptors, Androgen; D018808:Transcription Factor AP-1; D014157:Transcription Factors; D017364:Collagenases; D008666:Metalloendopeptidases; D019278:Matrix Metalloproteinase 3; D020783:Matrix Metalloproteinase 7; D020781:Matrix Metalloproteinase 1