TY - JOUR
T1 - Regional differences in human intestinal drug metabolism
AU - Iswandana, Raditya
AU - Irianti, Marina I.
AU - Oosterhuis, Dorenda
AU - Hofker, Hendrik S.
AU - Merema, Marjolijn T.
AU - De Jager, Marina H.
AU - Mutsaers, Henricus A.M.
AU - Olinga, Peter
N1 - Publisher Copyright:
Copyright © 2018 by The American Society for Pharmacology and Experimental Therapeutics.
PY - 2018/12
Y1 - 2018/12
N2 - The intestines are key for the absorption of nutrients and water as well as drug metabolism, and it is well known that there are clear differences in the expression profile of drug metabolism enzymes along the intestinal tract. Yet only a few studies have thoroughly investigated regional differences in human intestinal drug metabolism. In this study, we evaluated phase I and phase II metabolism in matched human ileum and colon precision-cut intestinal slices (PCIS). To this end, human PCIS were incubated for 3 hours with testosterone and 7-hydroxycoumarin (7-HC) to examine phase I and phase II metabolism, respectively. Metabolite formation was assessed by high-performance liquid chromatography analysis. Our results demonstrated that androstenedione, 6b-hydroxytes-tosterone, 2b-hydroxytestosterone, and 7-HC sulfate were predominantly formed in the ileum, while 15a-hydroxytestosterone and 7-HC glucuronide were mainly produced in the colon. Moreover, we also observed sex differences in phase II metabolite formation, which appeared to be higher in men compared with women. Taken together, we demonstrated that phase I metabolism predominantly occurs in ileum PCIS, while phase II metabolism mostly takes place in colon PCIS. Moreover, we revealed that human PCIS can be used to study both regional and sex differences in intestinal metabolism.
AB - The intestines are key for the absorption of nutrients and water as well as drug metabolism, and it is well known that there are clear differences in the expression profile of drug metabolism enzymes along the intestinal tract. Yet only a few studies have thoroughly investigated regional differences in human intestinal drug metabolism. In this study, we evaluated phase I and phase II metabolism in matched human ileum and colon precision-cut intestinal slices (PCIS). To this end, human PCIS were incubated for 3 hours with testosterone and 7-hydroxycoumarin (7-HC) to examine phase I and phase II metabolism, respectively. Metabolite formation was assessed by high-performance liquid chromatography analysis. Our results demonstrated that androstenedione, 6b-hydroxytes-tosterone, 2b-hydroxytestosterone, and 7-HC sulfate were predominantly formed in the ileum, while 15a-hydroxytestosterone and 7-HC glucuronide were mainly produced in the colon. Moreover, we also observed sex differences in phase II metabolite formation, which appeared to be higher in men compared with women. Taken together, we demonstrated that phase I metabolism predominantly occurs in ileum PCIS, while phase II metabolism mostly takes place in colon PCIS. Moreover, we revealed that human PCIS can be used to study both regional and sex differences in intestinal metabolism.
UR - http://www.scopus.com/inward/record.url?scp=85056358656&partnerID=8YFLogxK
U2 - 10.1124/dmd.118.083428
DO - 10.1124/dmd.118.083428
M3 - Article
C2 - 30275119
AN - SCOPUS:85056358656
SN - 0090-9556
VL - 46
SP - 1879
EP - 1885
JO - Drug Metabolism and Disposition
JF - Drug Metabolism and Disposition
IS - 12
ER -