scholarly journals Antitubercular Agent Delamanid and Metabolites as Substrates and Inhibitors of ABC and Solute Carrier Transporters

2016 ◽  
Vol 60 (6) ◽  
pp. 3497-3508 ◽  
Author(s):  
Hiroyuki Sasabe ◽  
Yoshihiko Shimokawa ◽  
Masakazu Shibata ◽  
Kenta Hashizume ◽  
Yusuke Hamasako ◽  
...  
Keyword(s):  
Abc Transporters ◽  
Organic Anion ◽  
Organic Cation Transporter ◽  
Multidrug Resistant ◽  
Inhibitory Effect ◽  
Cancer Resistance ◽  
Slc Transporters ◽  
Solute Carrier ◽  
Multiple Drugs

Delamanid (Deltyba, OPC-67683) is the first approved drug in a novel class of nitro-dihydro-imidazooxazoles developed for the treatment of multidrug-resistant tuberculosis. Patients with tuberculosis require treatment with multiple drugs, several of which have known drug-drug interactions. Transporters regulate drug absorption, distribution, and excretion; therefore, the inhibition of transport by one agent may alter the pharmacokinetics of another, leading to unexpected adverse events. Therefore, it is important to understand how delamanid affects transport activity. In the present study, the potencies of delamanid and its main metabolites as the substrates and inhibitors of various transporters were evaluatedin vitro. Delamanid was not transported by the efflux ATP-binding cassette (ABC) transporters P-glycoprotein (P-gp; MDR1/ABCB1) and breast cancer resistance protein (BCRP/ABCG2), solute carrier (SLC) transporters, organic anion-transporting polypeptides, or organic cation transporter 1. Similarly, metabolite 1 (M1) was not a substrate for any of these transporters except P-gp. Delamanid showed no inhibitory effect on ABC transporters MDR1, BCRP, and bile salt export pump (BSEP; ABCB11), SLC transporters, or organic anion transporters. M1 and M2 inhibited P-gp- and BCRP-mediated transport but did so only at the 50% inhibitory concentrations (M1, 4.65 and 5.71 μmol/liter, respectively; M2, 7.80 and 6.02 μmol/liter, respectively), well above the corresponding maximum concentration in plasma values observed following the administration of multiple doses in clinical trials. M3 and M4 did not affect the activities of any of the transporters tested. Thesein vitrodata suggest that delamanid is unlikely to have clinically relevant interactions with drugs for which absorption and disposition are mediated by this group of transporters.

Movement of Hydroxyurea Across Cell Membranes Is Mediated by Specific Solute Carrier (SLC) Transporters.

Blood ◽  
2009 ◽  
Vol 114 (22) ◽  
pp. 2575-2575
Author(s):  
Aisha L. Walker ◽  
Ryan M Franke ◽  
Alex Sparreboom ◽  
Russell E. Ware
Keyword(s):  
Vector Control ◽  
Cellular Uptake ◽  
Organic Cation ◽  
Organic Anion ◽  
Fold Increase ◽  
The Body ◽  
Transcellular Transport ◽  
Slc Transporters ◽  
Solute Carrier

Abstract Abstract 2575 Poster Board II-552 Background: Hydroxyurea is the only FDA-approved drug for the treatment of sickle cell anemia (SCA) in adults. Hydroxyurea increases fetal hemoglobin, decreases hospitalizations and painful events, and reduces mortality. With an oral bioavailability of > 90%, hydroxyurea is rapidly absorbed and distributed throughout the body. Though hydroxyurea has proven to be effective in treating SCA, there is considerable inter-patient variability observed in the pharmacokinetics and pharmacodynamics of hydroxyurea. Currently, mechanisms involved in the absorption, distribution, and elimination of hydroxyurea remain unclear. Recently, key transmembrane proteins have been identified as drug transporters due to their ability to move a variety of xenobiotic substances across cell membranes. Drug transporters are widely distributed throughout the body, and most are specific to certain substrates. Solute carrier (SLC) transporters in particular have been to shown to significantly impact drug pharmacokinetics by influencing the absorption, distribution, and elimination of specific drugs. The present study was designed to identify SLC transporters that may influence the absorption, distribution, and/or elimination of hydroxyurea in patients with SCA. Methods: In vitro studies using an equilibrium dialysis plate were performed to determine the amount of hydroxyurea that binds to human serum proteins. Transporter-mediated cellular uptake of hydroxyurea was determined in vitro by measuring [14C]-hydroxyurea accumulation in HEK293 cells and oocytes that overexpress organic anion transporters (OAT1-3), organic cation transporters (OCT1-3), organic cation/carnitine transporters (OCTN1-2), organic anion transporting polypeptides (OATP1A2/OATP1B1/OATP1B3), or vector control. LLC-PK1 cells that overexpress urea transporters A or B (UTA/UTB) were used to determine UTA/UTB mediated transcellular transport of hydroxyurea in transwell plates. The transport of [14C]-hydroxyurea from apical to basal or from basal to apical compartments was measured for the UTA/UTB overexpressing cells and compared to vector control. UTA and UTB mRNA expression was measured by real-time PCR of cDNA obtained from human tissue samples. Results: Protein binding assays showed that >76% of [14C]-hydroxyurea remained unbound to proteins in human serum containing hydroxyurea at concentrations ranging from 1.5μM to 500μM. The fraction of unbound hydroxyurea was similar using serum obtained from pediatric patients with SCA. In uptake studies, [14C]-hydroxyurea was a potent substrate for OATP1B3 with an approximately 2-fold increase in drug accumulation compared to control (p<0.001). In contrast, hydroxyurea was found to be a weak substrate for OCTN1, OCTN2, OATP1A2, and OATP1B1 with only a 1.3-fold increase in drug accumulation compared to control (p<0.04). Transcellular transport of hydroxyurea was increased 3- and 2-fold by UTA and UTB, respectively, compared to vector control demonstrating hydroxyurea to be a potent substrate for these transporters as well (p<0.02). When the urea transporter inhibitor dimethylurea was added, hydroxyurea transport by UTA and UTB-expressing cells was decreased to levels observed with the vector control. In real-time PCR assays, kidney, muscle, and small intestine were among human tissues with high expression of UTA mRNA, while prostate, brain, and bone marrow had high levels of UTB mRNA expression. Conclusion: Cellular uptake of hydroxyurea is mediated by active transport via specific SLC transporters OATP1B3, UTA and UTB, which are expressed in liver, kidney, brain, intestine, and blood cells. Studies to further characterize hydroxyurea transporters should improve our understanding of the pharmacokinetic and pharmacodynamic profiles of hydroxyurea used in clinical practice for patients with SCA. Disclosures: No relevant conflicts of interest to declare.

scholarly journals Comprehensive Substrate Characterization of 22 Antituberculosis Drugs for Multiple Solute Carrier (SLC) Uptake TransportersIn Vitro

2018 ◽  
Vol 62 (9) ◽  
Author(s):  
M. M. Parvez ◽  
Nazia Kaisar ◽  
Ho Jung Shin ◽  
Yoon Jae Lee ◽  
Jae-Gook Shin
Keyword(s):  
Drug Interactions ◽  
Organic Anion ◽  
Organic Anion Transporter ◽  
Antituberculosis Drugs ◽  
Hek 293 ◽  
Slc Transporters ◽  
Anion Transporter ◽  
Solute Carrier

ABSTRACTThe substrate potentials of antituberculosis drugs on solute carrier (SLC) transporters are not well characterized to date, despite a well-established understanding of their drug dispositions and pharmacokinetics. In this study, we investigated comprehensively the substrate potentials of the 22 currently available antituberculosis drugs for SLC family transporter-mediated uptake, usingXenopus laevisoocytes and stably transfected HEK-293 cellsin vitro. The result suggested that ethambutol, isoniazid, amoxicillin, and prothionamide act as novel substrates for the SLC transporters. In addition, in the presence of representative transporter inhibitors, the uptake of the antituberculosis drugs was markedly decreased compared with the uptake in the absence of inhibitor, suggesting involvement of the corresponding transporters. A cellular uptake study was performed, and theKmvalues of ethambutol were found to be 526.1 ± 15.6, 212.0 ± 20.1, 336.8 ± 20.1, and 455.0 ± 28 μM for organic cation transporter 1 (OCT1), OCT2, OCTN1, and OCTN2, respectively. Similarly, theKmof prothionamide was 805.8 ± 23.4 μM for OCT1, while theKmvalues of isoniazid and amoxicillin for organic anion transporter 3 (OAT3) were 233.7 ± 14.1 and 161.4 ± 10.6 μM, respectively. The estimatedin vivodrug-drug interaction indexes fromin vitrotransporter inhibition kinetics for verapamil, probenecid, and ibuprofen against ethambutol, prothionamide, isoniazid, and amoxicillin were found to show potential for clinical drug interactions. In conclusion, this is the first study that demonstrated 22 antituberculosis drug interactions with transporters. This study will be helpful for mechanistic understanding of the disposition, drug-drug interactions, and pharmacokinetics of these antituberculosis drugs.

scholarly journals Islatravir Is Not Expected to Be a Victim or Perpetrator of Drug-Drug Interactions via Major Drug-Metabolizing Enzymes or Transporters

Viruses ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1566
Author(s):  
Kelly Bleasby ◽  
Robert Houle ◽  
Michael Hafey ◽  
Meihong Lin ◽  
Jingjing Guo ◽  
...  
Keyword(s):  
Drug Interactions ◽  
Selective Serotonin Reuptake Inhibitors ◽  
Organic Anion ◽  
Organic Cation Transporter ◽  
Organic Anion Transporter ◽  
Uridine Diphosphate ◽  
Cancer Resistance ◽  
Treatment And Prevention ◽  
Anion Transporter

Islatravir (MK-8591) is a nucleoside reverse transcriptase translocation inhibitor in development for the treatment and prevention of HIV-1. The potential for islatravir to interact with commonly co-prescribed medications was studied in vitro. Elimination of islatravir is expected to be balanced between adenosine deaminase–mediated metabolism and renal excretion. Islatravir did not inhibit uridine diphosphate glucuronosyltransferase 1A1 or cytochrome p450 (CYP) enzymes CYP1A2, 2B6, 2C8, 2C9, 2C19, 2D6, or 3A4, nor did it induce CYP1A2, 2B6, or 3A4. Islatravir did not inhibit hepatic transporters organic anion transporting polypeptide (OATP) 1B1, OATP1B3, organic cation transporter (OCT) 1, bile salt export pump (BSEP), multidrug resistance-associated protein (MRP) 2, MRP3, or MRP4. Islatravir was neither a substrate nor a significant inhibitor of renal transporters organic anion transporter (OAT) 1, OAT3, OCT2, multidrug and toxin extrusion protein (MATE) 1, or MATE2K. Islatravir did not significantly inhibit P-glycoprotein and breast cancer resistance protein (BCRP); however, it was a substrate of BCRP, which is not expected to be of clinical significance. These findings suggest islatravir is unlikely to be the victim or perpetrator of drug-drug interactions with commonly co-prescribed medications, including statins, diuretics, anti-diabetic drugs, proton pump inhibitors, anticoagulants, benzodiazepines, and selective serotonin reuptake inhibitors.

scholarly journals In Vitro Inhibitory Effects of APINACA on Human Major Cytochrome P450, UDP-Glucuronosyltransferase Enzymes, and Drug Transporters

Molecules ◽  
2019 ◽  
Vol 24 (16) ◽  
pp. 3000 ◽  
Author(s):  
Sunjoo Kim ◽  
Won-Gu Choi ◽  
Mihwa Kwon ◽  
Sowon Lee ◽  
Yong-Yeon Cho ◽  
...  
Keyword(s):  
Drug Interactions ◽  
Organic Anion ◽  
Liver Microsomes ◽  
Organic Cation Transporter ◽  
Organic Anion Transporter ◽  
Drug Abusers ◽  
Cancer Resistance ◽  
Inhibitory Effects ◽  
Anion Transporter

APINACA (known as AKB48, N-(1-adamantyl)-1-pentyl-1H-indazole-3-carboxamide), an indazole carboxamide synthetic cannabinoid, has been used worldwide as a new psychoactive substance. Drug abusers take various drugs concomitantly, and therefore, it is necessary to characterize the potential of APINACA-induced drug–drug interactions due to the modulation of drug-metabolizing enzymes and transporters. In this study, the inhibitory effects of APINACA on eight major human cytochrome P450s (CYPs) and six uridine 5′-diphospho-glucuronosyltransferases (UGTs) in human liver microsomes, as well as on the transport activities of six solute carrier transporters and two efflux transporters in transporter-overexpressed cells, were investigated. APINACA exhibited time-dependent inhibition of CYP3A4-mediated midazolam 1′-hydroxylation (Ki, 4.5 µM; kinact, 0.04686 min−1) and noncompetitive inhibition of UGT1A9-mediated mycophenolic acid glucuronidation (Ki, 5.9 µM). APINACA did not significantly inhibit the CYPs 1A2, 2A6, 2B6, 2C8/9/19, or 2D6 or the UGTs 1A1, 1A3, 1A4, 1A6, or 2B7 at concentrations up to 100 µM. APINACA did not significantly inhibit the transport activities of organic anion transporter (OAT)1, OAT3, organic anion transporting polypeptide (OATP)1B1, OATP1B3, organic cation transporter (OCT)1, OCT2, P-glycoprotein, or breast cancer resistance protein at concentrations up to 250 μM. These data suggest that APINACA can cause drug interactions in the clinic via the inhibition of CYP3A4 or UGT1A9 activities.

scholarly journals Inhibitory Interaction Potential of 22 Antituberculosis Drugs on Organic Anion and Cation Transporters of the SLC22A Family

2016 ◽  
Vol 60 (11) ◽  
pp. 6558-6567 ◽  
Author(s):  
M. Masud Parvez ◽  
Nazia Kaisar ◽  
Ho Jung Shin ◽  
Jin Ah Jung ◽  
Jae-Gook Shin
Keyword(s):  
Organic Anion ◽  
Organic Cation Transporter ◽  
Inhibitory Effect ◽  
Hek293 Cells ◽  
Aminosalicylic Acid ◽  
Inhibitory Effects ◽  
Inhibitory Interaction ◽  
Antituberculosis Drugs

ABSTRACTTwenty-two currently marketed antituberculosis drugs were comprehensively evaluated for their inhibitory effect on organic anionic transporter (OAT)- and organic cation transporter (OCT)-mediated uptake using stably transfected HEK293 cellsin vitro. We observed moderate to strong inhibitory effects on OAT1- and OAT3-mediatedpara-aminohippurate (PAH) uptake and OCT1- and OCT2-mediatedN-methyl-4-phenylpylidinium acetate (MPP+) uptake. Ciprofloxacin, linezolid,para-aminosalicylic acid (PAS), and rifampin were observed to have strong inhibitory effects, with the concentrations for a 50% inhibitory effect (IC50s) being 35.1, 31.1, 37.6, and 48.1 μM, respectively, for OAT1 and >100, 21.9, 24.6, and 30.2 μM, respectively, for OAT3. Similarly, pyrazinamide, rifabutin, and levofloxacin were observed to have inhibitory effects, with IC50values being 36.5, 42.7, and 30.3 μM, respectively, for OCT1 and with the IC50value for PAS being 94.2 μM for OCT2. In addition, we used zidovudine and metformin as clinically prescribed substrates of OATs and OCTs, respectively, and zidovudine and metformin uptake was also strongly inhibited by the antituberculosis drugs. Among the tested drugs, the highest drug-drug interaction (DDI) indexes were found for PAS, which were 9.3 to 13.9 for OAT1 and 12.0 to 17.7 for OAT3, and linezolid, which were 1.18 to 2.15 for OAT1 and 1.7 to 3.01 for OAT3. Similarly, the DDI indexes of pyrazinamide and levofloxacin were 0.57 and 0.30, respectively, for OCT1, and the DDI index of PAS was 3.8 for OCT2, suggesting a stronger possibility (DDI index value cutoff, >0.1) ofin vivoDDIs. This is the first comprehensive report of the inhibitory potential of anti-TB drugs on OAT- and OCT-mediated uptake of prototype and clinically prescribed substrate drugsin vitro, providing an ability to predict DDIs between anti-TB drugs and other coprescribed drugs in clinical studiesin vivo.

Design, synthesis and antibacterial evaluation of ocotillol derivatives with polycyclic nitrogen-containing groups

2021 ◽  
Author(s):  
Yucheng Cao ◽  
Kaiyi Wang ◽  
Jiali Wang ◽  
Haoran Cheng ◽  
Mengxin Ma ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Multidrug Resistant ◽  
Inhibitory Effect ◽  
Resistant Bacteria ◽  
Design Synthesis ◽  
In Vitro Antibacterial Activity ◽  
Strong Inhibitory Effect ◽  
Hospital Acquired ◽  
Derivatives Of

Aim: With the increasing abuse of antibacterial drugs, multidrug-resistant bacteria have become a burden on human health and the healthcare system. To find alternative compounds effective against hospital-acquired methicillin-resistant Staphylococcus aureus (HA-MRSA), novel derivatives of ocotillol were synthesized. Methods & Results: Ocotillol derivatives with polycyclic nitrogen-containing groups were synthesized and evaluated for in vitro antibacterial activity. Compounds 36–39 exhibited potent antibacterial activity against hospital-acquired MRSA, with MIC = 8–64 μg/ml. Additionally, a combination of compound 37 and the commercially available antibiotic kanamycin showed synergistic inhibitory effects, with a fractional inhibitory concentration index of ≤0.375. Conclusion: Compound 37 has a strong inhibitory effect, and this derivative has potential for use as a pharmacological tool to explore antibacterial mechanisms.

scholarly journals In Vitro Evaluation of the Drug Interaction Potential of Doravirine

2019 ◽  
Vol 63 (4) ◽  
Author(s):  
Kelly Bleasby ◽  
Kerry L. Fillgrove ◽  
Robert Houle ◽  
Bing Lu ◽  
Jairam Palamanda ◽  
...  
Keyword(s):  
Drug Interactions ◽  
Organic Anion ◽  
Organic Anion Transporter ◽  
Reversible Inhibitor ◽  
Drug Metabolizing Enzymes ◽  
Cancer Resistance ◽  
Metabolizing Enzymes ◽  
Anion Transporter ◽  
Major Drug

ABSTRACT Doravirine is a novel nonnucleoside reverse transcriptase inhibitor for the treatment of human immunodeficiency virus type 1 infection. In vitro studies were conducted to assess the potential for drug interactions with doravirine via major drug-metabolizing enzymes and transporters. Kinetic studies confirmed that cytochrome P450 3A (CYP3A) plays a major role in the metabolism of doravirine, with ∼20-fold-higher catalytic efficiency for CYP3A4 versus CYP3A5. Doravirine was not a substrate of breast cancer resistance protein (BCRP) and likely not a substrate of organic anion transporting polypeptide 1B1 (OATP1B1) or OATP1B3. Doravirine was not a reversible inhibitor of major CYP enzymes (CYP1A2, -2B6, -2C8, -2C9, -2C19, -2D6, and -3A4) or of UGT1A1, nor was it a time-dependent inhibitor of CYP3A4. No induction of CYP1A2 or -2B6 was observed in cultured human hepatocytes; small increases in CYP3A4 mRNA (≤20%) were reported at doravirine concentrations of ≥10 μM but with no corresponding increase in enzyme activity. In vitro transport studies indicated a low potential for interactions with substrates of BCRP, P-glycoprotein, OATP1B1 and OATP1B3, the bile salt extrusion pump (BSEP), organic anion transporter 1 (OAT1) and OAT3, organic cation transporter 2 (OCT2), and multidrug and toxin extrusion 1 (MATE1) and MATE2K proteins. In summary, these in vitro findings indicate that CYP3A4 and CYP3A5 mediate the metabolism of doravirine, although with different catalytic efficiencies. Clinical trials reported elsewhere confirm that doravirine is subject to drug-drug interactions (DDIs) via CYP3A inhibitors and inducers, but they support the notion that DDIs (either direction) are unlikely via other major drug-metabolizing enzymes and transporters.

scholarly journals Quercetin Is a Flavonoid Breast Cancer Resistance Protein Inhibitor with an Impact on the Oral Pharmacokinetics of Sulfasalazine in Rats

Pharmaceutics ◽  
2020 ◽  
Vol 12 (5) ◽  
pp. 397
Author(s):  
Yoo-Kyung Song ◽  
Jin-Ha Yoon ◽  
Jong Kyu Woo ◽  
Ju-Hee Kang ◽  
Kyeong-Ryoon Lee ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Breast Cancer Resistance Protein ◽  
Fold Increase ◽  
Inhibitory Effect ◽  
Dependent Manner ◽  
Cancer Resistance ◽  
Concentration Dependent Manner ◽  
Resistance Protein

The potential inhibitory effect of quercetin, a major plant flavonol, on breast cancer resistance protein (BCRP) activity was investigated in this study. The presence of quercetin significantly increased the cellular accumulation and associated cytotoxicity of the BCRP substrate mitoxantrone in human cervical cancer cells (HeLa cells) in a concentration-dependent manner. The transcellular efflux of prazosin, a stereotypical BCRP substrate, was also significantly reduced in the presence of quercetin in a bidirectional transport assay using human BCRP-overexpressing cells; further kinetic analysis revealed IC50 and Ki values of 4.22 and 3.91 μM, respectively. Moreover, pretreatment with 10 mg/kg quercetin in rats led to a 1.8-fold and 1.5-fold increase in the AUC8h (i.e., 44.5 ± 11.8 min∙μg/mL vs. 25.7 ± 9.98 min∙μg/mL, p < 0.05) and Cmax (i.e., 179 ± 23.0 ng/mL vs. 122 ± 23.2 ng/mL, p < 0.05) of orally administered sulfasalazine, respectively. Collectively, these results provide evidence that quercetin acts as an in vivo as well as in vitro inhibitor of BCRP. Considering the high dietary intake of quercetin as well as its consumption as a dietary supplement, issuing a caution regarding its food–drug interactions should be considered.

scholarly journals In Vitro Interaction of AB-FUBINACA with Human Cytochrome P450, UDP-Glucuronosyltransferase Enzymes and Drug Transporters

Molecules ◽  
2020 ◽  
Vol 25 (19) ◽  
pp. 4589 ◽  
Author(s):  
Sunjoo Kim ◽  
Dong Kyun Kim ◽  
Yongho Shin ◽  
Ji-Hyeon Jeon ◽  
Im-Sook Song ◽  
...  
Keyword(s):  
Drug Interactions ◽  
Organic Anion ◽  
Liver Microsomes ◽  
Drug Abusers ◽  
Cancer Resistance ◽  
Mixed Inhibition ◽  
P Glycoprotein ◽  
Human Cytochrome

AB-FUBINACA, a synthetic indazole carboxamide cannabinoid, has been used worldwide as a new psychoactive substance. Because drug abusers take various drugs concomitantly, it is necessary to explore potential AB-FUBINACA-induced drug–drug interactions caused by modulation of drug-metabolizing enzymes and transporters. In this study, the inhibitory effects of AB-FUBINACA on eight major human cytochrome P450s (CYPs) and six uridine 5′-diphospho-glucuronosyltransferases (UGTs) of human liver microsomes, and on eight clinically important transport activities including organic cation transporters (OCT)1 and OCT2, organic anion transporters (OAT)1 and OAT3, organic anion transporting polypeptide transporters (OATP)1B1 and OATP1B3, P-glycoprotein, and breast cancer resistance protein (BCRP) in transporter-overexpressing cells were investigated. AB-FUBINACA inhibited CYP2B6-mediated bupropion hydroxylation via mixed inhibition with Ki value of 15.0 µM and competitively inhibited CYP2C8-catalyzed amodiaquine N-de-ethylation, CYP2C9-catalyzed diclofenac 4′-hydroxylation, CYP2C19-catalyzed [S]-mephenytoin 4′-hydroxylation, and CYP2D6-catalyzed bufuralol 1′-hydroxylation with Ki values of 19.9, 13.1, 6.3, and 20.8 µM, respectively. AB-FUBINACA inhibited OCT2-mediated MPP+ uptake via mixed inhibition (Ki, 54.2 µM) and competitively inhibited OATP1B1-mediated estrone-3-sulfate uptake (Ki, 94.4 µM). However, AB-FUBINACA did not significantly inhibit CYP1A2, CYP2A6, CYP3A4, UGT1A1, UGT1A3, UGT1A4, UGT1A6, or UGT2B7 enzyme activities at concentrations up to 100 µM. AB-FUBINACA did not significantly inhibit the transport activities of OCT1, OAT1/3, OATP1B3, P-glycoprotein, or BCRP at concentrations up to 250 μM. As the pharmacokinetics of AB-FUBINACA in humans and animals remain unknown, it is necessary to clinically evaluate potential in vivo pharmacokinetic drug–drug interactions induced by AB-FUBINACA-mediated inhibition of CYP2B6, CYP2C8, CYP2C9, CYP2C19, CYP2D6, OCT2, and OATP1B1 activities.

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