RATIONALE Prostaglandin (PG)E(2) exerts temporally distinct actions on blood vessels, immediate vasodilatation, and long-term activation of angiogenesis. OBJECTIVE To study the mechanism of PGE(2) induction of angiogenesis, we characterized its effect on fibroblast growth factor (FGF)-2 signaling in cultured endothelial cells and in ex vivo and in vivo assays of blood vessel formation. METH...

Preliminary results of a long-term animal study (rats) indicate synergism between inhaled vinyl chloride and ingested ethanol in tumorigenesis.

We have shown previously that the hepatic control region 1 (HCR-1) enhances the activity of the human apolipoprotein C-II (apoC-II) promoter in HepG2 cells via two hormone response elements (HREs) present in the apoC-II promoter. In the present paper, we report that the HCR-1 selectively mediates the transactivation of the apoC-II promoter by chenodeoxycholic acid (CDCA) and 9- cis -retinoic ac...

The two, nearly identical, isoforms of human progesterone receptors (PR), PR-B and -A, share activation functions (AF) 1 and 2, yet they possess markedly different transcriptional profiles, with PR-B being much stronger transactivators. Their differences map to a unique AF3 in the B-upstream segment (BUS), at the far N terminus of PR-B, which is missing in PR-A. Combined mutation of two LXXLL m...

Polyphenol-aspirin interactions were recently identified; however, the interaction mode and underlying mechanisms remained elusive. Here, we quantitatively assessed the potential interactions among two important polyphenolic compounds, caffeic acid (CA) and protocatechualdehyde (Pro), and aspirin in the AA-induced platelet aggregation model by applying the isobologram and universal response sur...

In ecotoxicology, the state of the art for effect assessment of chemical mixtures is through multiple dose-response analysis of single compounds and their combinations. Investigating whether such data deviate from the reference models of concentration addition and/or independent action to identify overall synergism or antagonism is becoming routine. However, recent data show that more complex d...