Abstract
The liver is the major organ responsible for the elimination of endogenous and exogenous compounds via metabolism and/or excretion. Hepatocytes, the predominant cell type in the liver, are polarized cells with discrete basolateral and apical membranes. In this chapter, localization and function of hepatic transport proteins responsible for hepatobiliary drug disposition in humans are introduced. Hepatic transport proteins on the basolateral membrane mediate influx of compounds from sinusoidal blood into hepatocytes (i.e., NTCP, OATPs, OATs, OCTs) or efflux from hepatocytes back to sinusoidal blood (i.e., MRP3-6, OSTα/β). Canalicular transport proteins such as BSEP, MDR3, P-gp, BCRP, MRP2, and MATE1 are responsible for biliary excretion of compounds. Furthermore, in vitro (i.e., membrane vesicles, transfected cell systems, hepatocytes, isolated perfused liver) and in vivo (i.e., biliary excretion studies, hepatobiliary imaging techniques) model systems and methods that are used to investigate hepatic transport proteins are discussed, and their applications, advantages, and disadvantages are considered.
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Abbreviations
- 99mTc-HIDA:
-
99mTc-N(2,6-dimethylphenyl carbamoylmethyl) iminodiacetic acid
- ABC:
-
ATP-binding cassette
- AMP:
-
Adenosine monophosphate
- ATP:
-
Adenosine triphosphate
- AUC:
-
Area under the concentration–time curve
- BCRP:
-
Breast cancer resistance protein
- bLPM:
-
Basolateral liver plasma membrane
- BSEP:
-
Bile salt export pump
- BSP:
-
Bromosulfophthalein
- CF-1 mice:
-
Mdr1a-deficient mice
- cLPM:
-
Canalicular liver plasma membrane
- CYP450:
-
Cytochrome P450
- DDI:
-
Drug–drug interaction
- DHEAS:
-
Dehydroepiandrosterone sulfate
- DILI:
-
Drug-induced liver injury
- DJS:
-
Dubin–Johnson syndrome
- E1S:
-
Estrone 3-sulfate
- E217G:
-
Estradiol-17β-D-glucuronide
- EHBR:
-
Eisai-hyperbilirubinemic Sprague–Dawley rats
- FXR:
-
Farnesoid X receptor
- Gd-BOPTA:
-
Gadobenate dimeglumine
- Gd-EOB-DPTA:
-
Gadolinium-ethoxybenzyl-diethylenetriamine pentaacetic acid
- HBSS:
-
Hanks-balanced salt solution
- HCC:
-
Hepatocellular carcinoma
- HEK cells:
-
Human embryonic kidney cells
- HMG-CoA:
-
3-Hydroxy-3-methyl-glutaryl coenzyme A
- HPLC:
-
High-performance liquid chromatography
- IPL:
-
Isolated perfused liver
- iPS cells:
-
Inducible pluripotent stem cells
- K m :
-
Michaelis–Menten constant
- LC/MS:
-
Liquid chromatography mass spectrometry
- LLC-PK1 cells:
-
Porcine kidney epithelial cells
- MATE:
-
Multidrug and toxin extrusion
- MDCK cells:
-
Madin–Darby canine kidney cells
- MDR:
-
Multidrug resistance
- MRI:
-
Magnetic-resonance imaging
- MRP:
-
Multidrug resistance-associated protein
- NCE:
-
New chemical entity
- NTCP:
-
Sodium taurocholate cotransporting polypeptide (human)
- Ntcp:
-
Sodium taurocholate cotransporting polypeptide (other species than human)
- OAT:
-
Organic anion transporter
- OATP:
-
Organic anion transporting polypeptide
- OST:
-
Organic solute transporter
- PBC:
-
Primary biliary cirrhosis
- PET:
-
Positron emission tomography
- PFIC2:
-
Progressive familial intrahepatic cholestasis type 2
- PFIC3:
-
Progressive familial intrahepatic cholestasis type 3
- Pgp:
-
P-glycoprotein
- RNA:
-
Ribonucleic acid
- RNAi:
-
RNA interference
- SCH:
-
Sandwich-cultured hepatocytes
- SD rat:
-
Sprague–Dawley rat
- shRNA:
-
Short hairpin RNA
- siRNA:
-
Small interfering RNA
- SLC:
-
Solute carrier
- SLCO:
-
Solute carrier organic anion
- SPECT:
-
Single-photon emission computed tomography
- TR− rat:
-
Mrp2-deficient Wistar rat
- UGT:
-
Uridine diphosphate glucuronosyl transferase
- V max :
-
Maximal transport velocity
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Acknowledgements
The authors are grateful for the helpful advice of Drs. Hoffmaster and Swift in the preparation of this chapter. This work was supported, in part, by a grant from the National Institute of General Medical Sciences of the National Institutes of Health under award number R01 GM41935 [K.L.R.B] and the German Research Foundation under award number Ko4186/1-1 [K.K]. The content is solely the responsibility of the authors and does not necessarily represent the official views of the National Institutes of Health.
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Yang, K., Köck, K., Brouwer, K.L.R. (2013). Analysis of Hepatic Transport Proteins. In: Sugiyama, Y., Steffansen, B. (eds) Transporters in Drug Development. AAPS Advances in the Pharmaceutical Sciences Series, vol 7. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-8229-1_9
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