to HSA is quite similar to that for octanoate or drugs that bind to drug site 2, as opposed to that for other medium-chain length of fatty acids. These findings provide useful basic information related to drug-HSA interactions. Moreover, the information presented herein is valuable in terms of providing safe and efficient treatment and diagnosis in clinical settings. () Effect of endogenous substances on the binding of sodium 4-phenylbutyrate to human serum albumin Yamasaki K Nishi K Enokida T Taguchi K Otagiri M Acta Chim Pharm Indica, Vol .8(1), pp. 124-129 201830 This study reports on the effect of endogenous substances such as fatty acids and indoxyl sulfate on the binding of sodium 4-phenylbutyrate(PB) to human serum albumin (HSA), using an ultrafiltration technique. The free concentration of PB in the filtrate was determined by HPLC. Fatty acids, particularly, octanoic acid are accompanied by a decrease in the binding of PB to HSA through an inhibitory displacement mechanism. The binding of indoxyl sulfate, a uremic toxin, to PB-HSA was decreased with increasing concentrations of caused of indoxyl sulfate. However, bilirubin showed a different behavior compared with octanoic acid and indoxyl sulfate: bilirubin had no effect on PB-HSA binding at lower concentrations of bilirubin, but the extent of binding was decreased at higher concentrations of bilirubin. The findings reported in this work provide basic and valuable information regarding our knowledge of altered PB binding that can occur in in certain diseased states. () The role of vimentin in the tumor marker Nup88-dependent multinucleated phenotype Makise M. Nakamura H.
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