347 research outputs found

    Regioselective photoalkylation of 2-cyano-6-methoxynaphthalene by methoxy-substituted 1,2-diarylcyclopropanes

    Get PDF
    金沢大学理工研究域物質化学系Photoreactions of 2-cyano-6-methoxynaphthalene with methoxy-substituted 1,2-diarylcyclopropanes in benzene give 2-cyano-1-(1,3-diarylpropyl)-6-methoxynaphthalenes. The excellent regioselectivity seen in these processes can be explained by initial formation of singlet exciplexes, in which the dipoles of each component are oriented in opposite directions. © 2009 Elsevier B.V. All rights reserved

    Adrenomedullin in peritoneal effluent expressed by peritoneal mesothelial cells

    Get PDF
    BACKGROUND: Adrenomedullin (AM) possesses vasodilative and cell-protective properties. Glycine combines with the C-terminal of AM to form mature, physiologically active AM (mAM). AM is reportedly induced by high glucose condition in vascular endothelial or smooth muscle cells; however, little is known on how AM is activated by amidation. To investigate the behavior of AM in patients undergoing peritoneal dialysis (PD), the concentrations of AM, mAM and CA125 were measured. The mAM to AM ratio (mAM/AM ratio) was also evaluated as a marker of amidation activity. METHODS: Twenty patients were recruited for this study. The effluent at the time of the peritoneal equilibration test was collected and AM, mAM and CA125 concentrations were measured. The expression of AM in peritoneal mesothelial cells (PMCs) collected from effluent was also examined with an indirect immunofluorescent method. RESULTS: Mean values of AM and mAM in effluent were 18.1 ± 1.6 and 4.1 ± 0.3 fmol/mL, respectively. In plasma, they were 42.6 ± 3.3 and 5.6 ± 0.6 fmol/mL, respectively. AM concentrations in effluent did not correlate with plasma AM level but correlated well with the dialysate-to-plasma ratio of creatinine (D/P ratio of creatinine). Moreover, in 7 of 20 cases, concentrations of the mAM and mAM/AM ratio in effluent were higher than in plasma. In effluent, AM concentration but not the mAM/AM ratio correlated with CA125 concentration. Immunocytological study revealed diffuse, cytoplasmic expression of AM in PMCs which were collected from effluent during PD. CONCLUSION: AM is expressed by PMCs and actively amidated in the abdominal cavity of patients undergoing PD
    corecore