Trial reportEuropean journal of clinical pharmacology2004
Gene expression of cytochromes P450 in liver transplants over time.
Trial report in European journal of clinical pharmacology, 2004. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
4 citing papers in PubMed, 15 citations in OpenAlex.
- Development of a predictive nomogram for switching immunosuppressive drugs in pediatric liver transplant recipients.Frontiers in pediatrics · 2023Article
- The correlation between the expression of genes involved in drug metabolism and the blood level of tacrolimus in liver transplant receipts.Scientific reports · 2017Article
- Donor CYP3A5 genotype influences tacrolimus disposition on the first day after paediatric liver transplantation.British journal of clinical pharmacology · 2017Article
- Cytochromes P450 and MDR1 mRNA expression along the human gastrointestinal tract.British journal of clinical pharmacology · 2005Article
Corrections and comments
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Authors and funding
6 authors at 3 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
objectiveThe aim of this study was to (a) quantify the gene expression of some cytochromes P(450) (CYP), especially CYP3A4, in serial biopsies from liver grafts the first year after orthoptic liver transplantation (OLT) and (b) study the relationship between hepatic CYP3A4 gene expression and plasma levels of cyclosporine and tacrolimus.
methodsLiver tissue was obtained from surplus material of routine liver biopsies performed in 20 patients during the first year after OLT. Real-time reverse-transcription polymerase chain reaction was used for quantitative analyses of mRNA specific for CYP3A4, CYP3A5, CYP2E1 and CYP1A2 cytochromes as well as P-glycoprotein (P-gp). The gene expression of beta-actin was used as an internal standard for comparisons between samples.
resultsThe median value of the mRNA for all cytochromes, but not for P-gp, was found to increase significantly over time. The gene expression of CYP3A5, CYP2E1 and CYP1A2 was higher than that of CYP3A4. The gene expression of CYP3A4 was related to the plasma concentration of cyclosporine and tacrolimus, i.e. low mRNA concentrations corresponded to high serum concentration levels and vice versa. The serum concentration of bilirubin or the prothrombin index did not correlate with the gene expression level of the cytochromes.
conclusionThe hepatic mRNA expression of CYP3A4 and the other investigated cytochromes increased during the first year after OLT. This was not the case with P-gp. Low CYP3A4 gene expression was related to high plasma levels of cyclosporine and tacrolimus and vice versa.
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Registered trials
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