Reanalysis of the testosterone displacement from its HSA binding site by DHEA using competitive Langmuir isotherm.
In a previous manuscript [C. Andre, A. Berthelot, J.F. Robert, M. Thomassin, Y.C. Guillaume, J. Pharm. Bio. Med., in press], the Mg(2+) effect on the testosterone displacement equilibrium from its human serum albumin (HSA) binding site by DHEA was investigated using a thermodynamic approach. In this paper, a novel concept based on the competitive Langmuir distribution isotherms was proposed to calculate the association constant of the HSA-hormone binding and to confirm the Mg(2+) role on the testosterone displacement equilibrium from its HSA binding site by DHEA. Thus, both the HSA-hormone binding and the displacement equilibrium processes were reanalysed. The results obtained confirmed that:
André
Claire
C
Equipe des Sciences Séparatives et Biopharmaceutiques (2SB), Laboratoires de Chimie Analytique, Faculté de Médecine et de Pharmacie, Place Saint-Jacques, 25030 Besançon cedex, France.
Xicluna
Alain
A
Robert
Jean-François
JF
Thomassin
Mireille
M
Guillaume
Yves-Claude
YC