title: Real-time quantitative polymerase chain reaction for MDR1, MRP1, MRP2, and CYP3A-mRNA levels in Caco-2 cell lines, human duodenal enterocytes, normal colorectal tissues, and colorectal adenocarcinomas.
abstract: The expression levels of mRNAs for MDR1 (P-glycoprotein), multidrug resistance-associated proteins (MRP1, MRP2), and cytochrome P450 3A (CYP3A) in Caco-2 cells were quantitatively compared with those in human duodenal enterocytes, normal colorectal tissues, and colorectal adenocarcinomas. Caco-2 cells (passages 36-88) were kindly supplied by several laboratories in Japan. Human duodenal enterocytes were obtained from five healthy male volunteers. Normal colorectal tissues and colorectal adenocarcinomas were simultaneously obtained from seven patients with primary colorectal adenocarcinoma. MDR1, MRP1, MRP2, and CYP3A mRNA levels were determined by real-time quantitative polymerase chain reactions (PCR). Relative concentrations of mRNAs for target proteins (MDR1, MRP1, MRP2, and CYP3A) and glyceraldehyde-3-phosphate dehydrogenase in Caco-2 cells were 1.00 +/- 0.15, 1.02 +/- 0.06, 0.94 +/- 0.10, and 0.68 +/-0.60, respectively, and those in human enterocytes were about 12-, 3-, 7-, and 8000-fold higher than in the Caco-2 cells, respectively. In contrast, MDR1, MRP1, and CYP3A mRNA levels in Caco-2 cells were comparable to those in normal colorectal tissue and colorectal adenocarcinoma.
authors.affiliation: Department of Hospital Pharmacy, School of Medicine, Kobe University, Chuo-ku, Kobe 650-0017, Japan.
authors.forename: Tsutomu
authors.initials: T
authors.lastname: Nakamura
authors.forename: Toshiyuki
authors.initials: T
authors.lastname: Sakaeda
authors.forename: Nobuko
authors.initials: N
authors.lastname: Ohmoto
authors.forename: Takao
authors.initials: T
authors.lastname: Tamura
authors.forename: Nobuo
authors.initials: N
authors.lastname: Aoyama
authors.forename: Toshiro
authors.initials: T
authors.lastname: Shirakawa
authors.forename: Takashi
authors.initials: T
authors.lastname: Kamigaki
authors.forename: Takeshi
authors.initials: T
authors.lastname: Nakamura
authors.forename: Ke Ih
authors.initials: KI
authors.lastname: Kim
authors.forename: Soo Ryang
authors.initials: SR
authors.lastname: Kim
authors.forename: Yoshikazu
authors.initials: Y
authors.lastname: Kuroda
authors.forename: Masafumi
authors.initials: M
authors.lastname: Matsuo
authors.forename: Masato
authors.initials: M
authors.lastname: Kasuga
authors.forename: Katsuhiko
authors.initials: K
authors.lastname: Okumura
mesh_terms: D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1 / Q000235:genetics / Q000378:metabolism; D000230:Adenocarcinoma / Q000378:metabolism*; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001189:Aryl Hydrocarbon Hydroxylases; D018938:Caco-2 Cells; D003106:Colon / Q000378:metabolism; D015179:Colorectal Neoplasms / Q000378:metabolism*; D051544:Cytochrome P-450 CYP3A; D003577:Cytochrome P-450 Enzyme System / Q000235:genetics / Q000378:metabolism*; D004386:Duodenum / Q000166:cytology / Q000378:metabolism; D020895:Enterocytes / Q000378:metabolism*; D005260:Female; D015870:Gene Expression; D024601:Glyceraldehyde 3-Phosphate Dehydrogenase (NADP+) / Q000235:genetics / Q000378:metabolism; D006801:Humans; D007413:Intestinal Mucosa / Q000378:metabolism*; D008297:Male; D026901:Membrane Transport Proteins; D000089762:Multidrug Resistance-Associated Protein 2; D027425:ATP-Binding Cassette, Sub-Family C Proteins / Q000235:genetics / Q000378:metabolism*; D010089:Oxidoreductases, N-Demethylating / Q000235:genetics / Q000378:metabolism*; D016133:Polymerase Chain Reaction; D012333:RNA, Messenger / Q000032:analysis*; D012007:Rectum / Q000378:metabolism
chemical_list: D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1; D001189:Aryl Hydrocarbon Hydroxylases; D051544:Cytochrome P-450 CYP3A; D003577:Cytochrome P-450 Enzyme System; D024601:Glyceraldehyde 3-Phosphate Dehydrogenase (NADP+); D026901:Membrane Transport Proteins; D000089762:Multidrug Resistance-Associated Protein 2; D027425:ATP-Binding Cassette, Sub-Family C Proteins; D010089:Oxidoreductases, N-Demethylating; D012333:RNA, Messenger; C000715087:ABCC2 protein, human; C421109:multidrug resistance-associated protein 1