Benzbromarone Analog SAR: Potent hURAT1 (SLC22A12) Inhibitors and Drug Transporter Interaction Studies
1
Issued Date
2025-01-01
Resource Type
eISSN
11778881
Scopus ID
2-s2.0-86000192804
Pubmed ID
40026329
Journal Title
Drug design, development and therapy
Volume
19
Start Page
1377
End Page
1392
Rights Holder(s)
SCOPUS
Bibliographic Citation
Drug design, development and therapy Vol.19 (2025) , 1377-1392
Suggested Citation
Jutabha P., Kumar V., Anzai N., Rice P.J., Lightner J.W., Endou H., Wempe M.F. Benzbromarone Analog SAR: Potent hURAT1 (SLC22A12) Inhibitors and Drug Transporter Interaction Studies. Drug design, development and therapy Vol.19 (2025) , 1377-1392. 1392. doi:10.2147/DDDT.S474398 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/106703
Title
Benzbromarone Analog SAR: Potent hURAT1 (SLC22A12) Inhibitors and Drug Transporter Interaction Studies
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Corresponding Author(s)
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Abstract
Purpose: There were two main purposes for this study. One, to report two benzbromarone analogs and test their in vitro activity in the URAT1 inhibition assay; and two, to probe the structure-activity relationship (SAR) of various benzbromarone analogs regarding other drug transporters that may play a role in the uric acid uptake/elimination interplay. Methods: In brief, chemical synthesis of two benzbromarone analogs was prepared using methods analogous to those reported. Furthermore, drug transporter protein inhibition was investigated in vitro using oocytes expressing hURAT1, hURATv1 (GLUT9), hOAT1, hOAT3, hOAT10, hNPT4, OATP1B1, OATP1B3 and OATP2B1 prepared and utilized to conduct inhibition studies. In addition, one novel benzbromarone analog was studied via in vivo rat pharmacokinetic experiments to determine apparent oral bioavailability. Results: Two analogs, 6-fluoro-benzbromarone (5) and 5,6-difluoro-benzbromarone (9), were synthetically prepared and 5 had a hURAT1 IC50 inhibition of 18 ± 4 nM, while analog (9) had an IC50 of 245 ± 64 nM. Analog (5) had good oral bioavailability (Fa) >0.6 in rat. Eadie-Hofstee plot and double-reciprocal plot of the Michaelis-Menten equation are summarized for benzbromarone (2) and its major Phase I metabolite 6-hydroxy-benzbromarone (3). Conclusion: These results illustrate that the Km for [14C]UA uptake was not altered in the presence of 2 or 3, but rather the Vmax was reduced in the presence of inhibitors when added to the uptake solutions. As a result, these data support the notion that 2 and 3 inhibit [14C]UA uptake by non-competitive inhibition and not at the URAT1 binding site.