3.4.24.B5 down endothelin-1 (ET-1) downregulates matrix metalloproteinase 15 expression in human first trimester trophoblasts via endothelin receptor type B (ETRB). ET-1 downregulates MMP15 mRNA and protein levels. TNF-alpha enhances ET-1-mediated MMP15 downregulation in primary trophoblasts 753776 3.4.24.B5 down inhibition of follicle ovulation, by the inhibitors roscovitine or CDK9-inhibitor II, is accompanied by the suppression of Mmp15 expression in the follicle. Roscovitine treatment of follicles inhibits Pgr binding to the mmp15 promoter region 753226 3.4.24.B5 additional information after phosphorylation (by CDK9 and cyclin 1), Pgr becomes a functional transcription factor for mmp15 gene expression 753226 3.4.24.B5 up Mmp15 is an luteinizing hormone (LH)-inducible enzyme 753226 3.4.24.B5 up the enzyme is significantly up-regulated in placentas from severe early-onset preeclamptic pregnancies compared to gestationally matched preterm controls 735055