| Autor: |
Blanchard, Nadège, Hewitt, Nicola J., Silber, Paul, Jones, Hannah, Coassolo, Philippe, Lave, Thierry |
| Zdroj: |
Journal of Pharmacy and Pharmacology; May 2006, Vol. 58 Issue: 5 p633-641, 9p |
| Abstrakt: |
Cryopreserved human hepatocytes have been used to predict hepatic in‐vivo clearance. Physiologically‐based direct scaling methods generally underestimate human in‐vivo hepatic clearance. Cryopreserved human hepatocytes were incubated in 100% serum and in serum‐free medium to predict the in‐vivo hepatic clearance of six compounds (phenazone (antipyrine), bosentan, mibefradil, midazolam, naloxone and oxazepam). Monte Carlo simulations were performed in an attempt to incorporate the variability and uncertainty in the measured parameters to the prediction of hepatic clearance. The intrinsic clearance (CLint) and the associated variability of the six compounds decreased in the presence of serum and the values were reproducible across donors. The predicted CLhep, in‐vivoobtained with hepatocytes from donors incubated in serum was more accurate than the prediction obtained in the absence of serum. For example, the CLhep, in‐vivoof mibefradil in donor GNG was 4.27 mL min−1kg−1in the presence of serum and 0.46 mL min−1kg−1in the absence of serum (4.88 mL min−1kg−1observed in‐vivo). Using the results obtained in this study together with an extended data set (26 compounds), the clearance of 77% of the compounds was predicted within a 2‐fold error in the absence of serum. In the presence of serum, 85% of the compounds were successfully predicted within a 2‐fold error. In conclusion, cryopreserved human hepatocyte suspensions represented a convenient and predictive model to assess human drug clearance. |
| Databáze: |
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