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Träfflista för sökning "WFRF:(Olsson M) srt2:(1990-1999)"

Search: WFRF:(Olsson M) > (1990-1999)

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  • Hassan, M, et al. (author)
  • A mechanism-based pharmacokinetic-enzyme model for cyclophosphamide autoinduction in breast cancer patients
  • 1999
  • In: British Journal of Clinical Pharmacology. - 0306-5251 .- 1365-2125. ; 48:5, s. 669-677
  • Journal article (peer-reviewed)abstract
    • Aims This study investigated the pharmacokinetics of cyclophosphamide (CP) and its main metabolite 4-hydroxycyclophosphamide (4-OH-CP) in patients with breast cancer undergoing high dose chemotherapy prior to autologous stem cell transplantation. An enzyme turn-over model was also developed to study the time course of cyclophosphamide induction. Methods Fourteen patients received a combination of CP (6 g m(-2)), thiotepum (500 mg m(-2)) and carboplatin (800 mg m(-2)) as a 96 h infusion. Plasma concentrations of CP and 4-OH-CP were determined with h.p.l.c. and a pharmacokinetic and enzyme turn-over model applied to data using NONMEM. Results CP plasma concentrations were described by a two-compartment model with a noninducible and an inducible pathway, the latter forming 4-OH-CP. In the final enzyme model, CP affects the amount of enzymes by increasing the enzyme production rate. CP concentrations decreased during the infusion with no subsequent change in 4-OH-CP concentrations. CP inducible and noninducible clearance were estimated to 1.76 1 h(-1) (90% C.I. 0.92-2.58) and 1.14 1 h(-1) (0.31-1.85), respectively. The induction resulted in an approximately doubled CP clearance through the inducible pathway at the end of treatment. The model predicted the enzyme turn-over half-life to be 24 h. Conclusions The presented mechanism-based enzyme induction model where the pharmacokinetics of the inducer and the enzyme pool counterbalance each other successfully described CP autoinduction. It is reasonable to believe that CP affects its own elimination by increasing the enzyme production rate and thereby increasing the amount of enzyme by which CP is eliminated.
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  • Result 1-10 of 337
Type of publication
journal article (291)
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reports (5)
other publication (3)
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Type of content
peer-reviewed (286)
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Author/Editor
Olsson, T (48)
Olsson, M. (46)
Olsson, Y (30)
Landin-Olsson, M (25)
Olsson, H. (22)
SUNDKVIST, G (18)
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Olsson, N (17)
Lernmark, Å (17)
Blomgren, J (16)
Andersson, M (15)
Nilsson, L. (13)
Bakhiet, M (11)
Holm, M. (11)
Olsson, S (11)
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Tegelstrom, H (9)
Khademi, M. (8)
Olsson, C (8)
Borg, Åke (8)
Olsson, Bertil (8)
Kristensson, K (8)
Li, G. L. (8)
LERNMARK, A (7)
Ilver, L (7)
Kanski, J (7)
Karlsson, Ulf O. (7)
Håkansson, A. (7)
Olsson, I (7)
Conde, H (7)
van der Werf, S.Y (7)
Jonsson, O. (6)
Johansson, Rolf (6)
Kockum, I. (6)
Wallstrom, E (6)
Schersten, B (6)
Laurell, Fredrik (6)
Fagerlund, M (6)
Ryde, Ulf (6)
Hakansson, M C (6)
Olsson, L O (6)
LITHNER, F (6)
Renberg, P-U (6)
Blohme, G (6)
Tibell, G. (6)
Zorro, R. (6)
Ljungdahl, A (6)
Österlund, M. (6)
Brandenburg, S (6)
van der Woude, A (6)
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