Oral drug absorption predictions using “in silico” models (SIMCYP®): Statins

  • Adrián López
    Universidad de Salamanca
  • María Dolores Santos
    Universidad de Salamanca
  • María José García
    Universidad de Salamanca mjgarcia[at]usal.es

Abstract

Using Simcyp® software, simulation studies were done in order to evaluate the capacity of this software to predict clinical evidence related to absorption profile of two statins: simvastatin and rosuvastatin. Specifically, we evaluate the influence of intestinal transit time, transporter abundance and enzymes responsible of metabolism in gastrointestinal tract. First of all we looked for bibliographic information about the absorption profile of these drugs. Then we carried out simulations in different population groups, mainly in normal populations, populations with accelerated intestinal transit and poor metabolizers. For rosuvastatin its efflux transporter (ABCG2) was also blocked and its permeability altered. The results are consistent with observations drawn from clinical experience. They show that the transit rate significantly affects the absorbed fraction of simvastatin, but not the rate of rosuvastatin; however the transporter abundance and permeability value are relevant in the absorption of rosuvastatin. CYP3A4 is shown as the most important isoenzyme responsible of the biotransformation of simvastatin, confirming that CYP3A4 does not participate in rosuvastatin intestinal metabolism.
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López, A., Santos, M. D., & García, M. J. (2017). Oral drug absorption predictions using “in silico” models (SIMCYP®): Statins. FarmaJournal, 2(2), 69–79. Retrieved from https://revistas.usal.es/cinco/index.php/2445-1355/article/view/16015

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Author Biographies

Adrián López

,
Universidad de Salamanca
Avenida de Salamanca nº35 1ºB, Plasencia (Cáceres). C.P.10600.Teléfono fijo: 927406467. Teléfono móvil: 680179102.

María José García

,
Universidad de Salamanca
Departamento de Ciencias farmacéuticas: Farmacia y Tecnología Farmacéutica. Facultad de Farmacia, Universidad de Salamanca. Campus Miguel de Unamuno, Calle Lic. Méndez Nieto, s/n, 37007 Salamanca.
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