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Erlotinib treatment...
Erlotinib treatment induces cytochrome P450 3A activity in non-small cell lung cancer patients
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- Svedberg, Anna (author)
- Linköpings universitet,Avdelningen för läkemedelsforskning,Medicinska fakulteten
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- Vikingsson, Svante (author)
- Linköpings universitet,Avdelningen för läkemedelsforskning,Medicinska fakulteten,Natl Board Forens Med, Dept Forens Genet and Forens Toxicol, Linkoping, Sweden
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- Vikström, Anders (author)
- Linköpings universitet,Institutionen för klinisk och experimentell medicin,Medicinska fakulteten,Region Östergötland, Lungmedicinska kliniken US
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- Hornstra, N. (author)
- Kalmar Cty Hosp, Dept Pulm Med, Kalmar, Sweden
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- Kentson, Magnus (author)
- Linköpings universitet,Institutionen för medicin och hälsa,Medicinska fakulteten,Ryhov Hosp, Sweden
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- Brandén, Eva (author)
- Uppsala universitet,Centrum för klinisk forskning, Gävleborg,Gavle Cent Hosp, Sweden; Uppsala Univ Reg Gavleborg, Sweden
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- Koyi, Hirsh (author)
- Karolinska Institutet,Uppsala universitet,Centrum för klinisk forskning, Gävleborg,Gavle Cent Hosp, Sweden; Uppsala Univ Reg Gavleborg, Sweden
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- Bergman, Bengt, 1953 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för medicin,Institute of Medicine,Univ Gothenburg, Sahlgrenska Acad, Inst Med, Dept Resp Med & Allergol, Gothenburg, Sweden
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- Green, Henrik (author)
- Linköpings universitet,Avdelningen för läkemedelsforskning,Medicinska fakulteten,Natl Board Forens Med, Dept Forens Genet and Forens Toxicol, Linkoping, Sweden
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(creator_code:org_t)
- 2019-05-27
- 2019
- English.
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In: British Journal of Clinical Pharmacology. - : Wiley. - 0306-5251 .- 1365-2125. ; 85:8, s. 1704-1709
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Abstract
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- Aims Erlotinib is a tyrosine kinase inhibitor used in the treatment of non-small cell lung cancer highly metabolized by the cytochrome P450 (CYP) 3A. Hence, CYP3A4 activity might be a useful predictor of erlotinib pharmacokinetics in personalized medicine. The effect of erlotinib on CYP3A activity was therefore studied in non-small cell lung cancer patients. Methods The study included 32 patients scheduled for erlotinib monotherapy. CYP3A activity was assessed using quinine as a probe before and during erlotinib treatment. Plasma from blood samples drawn 16 hours post quinine administration were analysed using HPLC with fluorescence detection to determine the quinine/3-OH-quinine ratio. Results Matched samples, available from 13 patients, showed an induction of CYP3A activity (P = 0.003, Wilcoxon's signed rank test) after 2 months of treatment. The quinine/3-OH-quinine ratio decreased from 20.2 (+/- 13.4) at baseline to 11.0 (+/- 4.34). Single-point samples, available from 19 patients, supported the decrease in ratio (P = 0.007, Mann-Whitney U-test). Generally, females had a higher CYP3A activity both at baseline and after two months of treatment. Statistical analysis by gender also showed significant increase in CYP3A activity (males, n = 10, P = 0.001, and females, n = 22, P = 0.001). Conclusions An induction of CYP3A activity was observed after 2 months of erlotinib treatment which was also seen when subdividing based on gender. It could be important to take this into consideration for patients co-administering other CYP3A-metabolizing drugs during erlotinib treatment and also makes it difficult to use baseline CYP3A activity to predict erlotinib pharmacokinetics.
Subject headings
- MEDICIN OCH HÄLSOVETENSKAP -- Medicinska och farmaceutiska grundvetenskaper -- Farmaceutiska vetenskaper (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Basic Medicine -- Pharmaceutical Sciences (hsv//eng)
- MEDICIN OCH HÄLSOVETENSKAP -- Medicinska och farmaceutiska grundvetenskaper -- Farmakologi och toxikologi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Basic Medicine -- Pharmacology and Toxicology (hsv//eng)
Keyword
- CYP3A activity
- erlotinib
- non-small cell lung cancer
- quinine
- Tarceva
- receptor tyrosine kinase
- in-vitro
- quinine 3-hydroxylation
- cyp3a
- inhibitor
- 4-beta-hydroxycholesterol
- metabolism
- midazolam
- pharmacokinetics
- induction
- Pharmacology & Pharmacy
- CYP3A activity
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Svedberg, Anna
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Vikingsson, Svan ...
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Vikström, Anders
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Hornstra, N.
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Kentson, Magnus
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Brandén, Eva
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show more...
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Koyi, Hirsh
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Bergman, Bengt, ...
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Green, Henrik
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- About the subject
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- MEDICAL AND HEALTH SCIENCES
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MEDICAL AND HEAL ...
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and Basic Medicine
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and Pharmaceutical S ...
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- MEDICAL AND HEALTH SCIENCES
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MEDICAL AND HEAL ...
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and Basic Medicine
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and Pharmacology and ...
- Articles in the publication
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British Journal ...
- By the university
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University of Gothenburg
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Uppsala University
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Linköping University
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Karolinska Institutet