Prospective studies on the CVR associated with arginine/ADMA ratio and homoarginine in patients with moderate chronic kidney disease (CKD) are still scarce. We have studied how arginine, homoarginine and dimethylated arginine can predict cardiovascular events in such a population. Design and methods: We measured plasma concentrations of arginine (P-arginine), ADMA (P-ADMA), SDMA (P-SDMA), homoarginine (P-homoarginine) and other covariates
in 160 patients with predialytic CKD (mean age 57 years and mean eGFR 43 mL/min/1.73 m(2)) and followed them for 58 months in median. The risks of fatal and non-fatal cardiovascular events associated with the predictors were evaluated with multivariable Cox proportional hazard analysis. Results: There were 31 cardiovascular events during the observation period. In a multivariable model adjusted for age, sex, previous cardiovascular disease, P-cystatin C and Bucladesine solubility dmso P-homoarginine, the hazard ratio (HR) associated with an increase in arginine/ADMA ratio by 10 was 0.83 (P = 0.03). The HR of a 1 mu mol/L increase in P-homoarginine in the same model was 1.78 (P = 0.01). A statistically significant interaction between P-homoarginine and P-cystatin
C was found in an extended multivariable model. P-SDMA was not associated with increased CVR after adjustment for basic covariates. Conclusion: This study demonstrates a negative association between arginine/ADMA ratio and CVR in CKD patients and a positive association between P-homoarginine and CVR. The latter is in contrast to what has been demonstrated find more by others. (C) 2015
The Canadian Society of Clinical Chemists. Published by Elsevier Inc. All rights reserved.”
“Complexes of platinum(II) with polypyridine (that is, the multidentate ligands related to pyridine, such as bipyridine GDC973 or terpyridine) have rich photophysical properties. These compounds are able to give different crystal forms in the solid state: this polymorphism is evident in the broad range of colors that can be observed in solid samples. Because of the square-planar coordination geometry of the metal center, Pt center dot center dot center dot Pt as well as pi-pi interactions between the chromophoric polypyridyl platinum(II) moieties are thought to contribute to the polymorphism. Owing to limited solubility, metal center dot center dot center dot metal interactions in platinum(II) polypyridyl systems had been mainly studied in the solid state, but our preparation of more soluble complexes has enabled detailed spectroscopic examinations in solution. In this Account, we describe our development of these alkynylplatinum(II) terpyridyl complexes and their unique spectral properties.\n\nA series of square-planar platinum(II) terpyridyl complexes with enhanced solubility due to the presence of the alkynyl group exhibited intense emission in solution.