title: XAS applied to pharmaceuticals: drug administration and bioavailability.
abstract: We present selected XAS applications, focused towards practical hospital questions of drug administration and bioavailability, where the technique is driven up to its limits of sensitivity. i) XAS was used to study the interactions between the components of parenteral nutrition solutions, in particular zinc and aminoacids, possibly modifying their bioavailability. ii) We studied by EXAFS a series of binary and ternary copper-aminoacid complexes, in view of the development of an efficient oral drug against copper deficiencies in Menkes disease. iii) EXAFS and XANES analysis allowed us to characterise the solution form of a new arsenic containing drug against leukaemia. In parallel to the XAS measurements, we analysed trace elements levels along patients' hairs, using X-ray fluorescence excited by synchrotron radiation. The measurements along the hair allow for a monitoring of essential trace elements during therapy.
authors.affiliation: Laboratoire de Biomathématique, Faculté de Harmacie, Université Paris V, France. nicolis@pharmacie.univ-paris5.fr
authors.forename: I
authors.initials: I
authors.lastname: Nicolis
authors.forename: P
authors.initials: P
authors.lastname: Deschamps
authors.forename: E
authors.initials: E
authors.lastname: Curis
authors.forename: O
authors.initials: O
authors.lastname: Corriol
authors.forename: V
authors.initials: V
authors.lastname: Acar
authors.forename: N
authors.initials: N
authors.lastname: Zerrouk
authors.forename: J C
authors.initials: JC
authors.lastname: Chaumeil
authors.forename: F
authors.initials: F
authors.lastname: Guyon
authors.forename: S
authors.initials: S
authors.lastname: Bénazeth
mesh_terms: D000077237:Arsenic Trioxide; D001152:Arsenicals / Q000008:administration & dosage / Q000737:chemistry / Q000493:pharmacokinetics*; D001682:Biological Availability; D002626:Chemistry, Pharmaceutical; D006197:Hair / Q000737:chemistry / Q000378:metabolism*; D006639:Histidine / Q000008:administration & dosage / Q000031:analogs & derivatives / Q000737:chemistry / Q000493:pharmacokinetics*; D006801:Humans; D015473:Leukemia, Promyelocytic, Acute / Q000188:drug therapy / Q000378:metabolism; D007706:Menkes Kinky Hair Syndrome / Q000188:drug therapy / Q000378:metabolism; D009942:Organometallic Compounds / Q000008:administration & dosage / Q000737:chemistry / Q000493:pharmacokinetics*; D010087:Oxides / Q000008:administration & dosage / Q000737:chemistry / Q000493:pharmacokinetics*; D010288:Parenteral Nutrition / Q000379:methods; D013052:Spectrometry, X-Ray Emission / Q000379:methods; D017356:Synchrotrons; D015032:Zinc / Q000008:administration & dosage / Q000737:chemistry / Q000493:pharmacokinetics*
chemical_list: D001152:Arsenicals; D009942:Organometallic Compounds; D010087:Oxides; D006639:Histidine; C098468:copper histidine; D015032:Zinc; D000077237:Arsenic Trioxide