Arylsulfatase B Mediates the Sulfonation-Transport Interplay in Human Embryonic Kidney 293 Cells Overexpressing Sulfotransferase 1A3.
Elucidating the intricate relationships between metabolic and transport pathways contributes to improved predictions of in vivo drug disposition and drug-drug interactions. Here we reported that inhibited excretion of conjugative metabolites [i.e., hesperetin 3'-O-sulfate (H3'S) and hesperetin 7-O-sulfate (H7S)] by MK-571 led to reduced metabolism of hesperetin (a maximal 78% reduction) in human embryonic kidney 293 cells overexpressing sulfotransferase 1A3 (named SULT293 cells). The strong dependence of cellular sulfonation on the efflux transport of generated sulfated metabolites revealed an interplay of sulfonation metabolism with efflux transport (or sulfonation-transport interplay). Polymerase chain reaction (PCR) and Western blot analyses demonstrated that SULT293 cells expressed multiple sulfatases such as arylsulfatase A (ARSA), ARSB, and ARSC. Of these three desulfonation enzymes, only ARSB showed significant activities toward hesperetin sulfates. The intrinsic clearance values for the hydrolysis of H3'S and H7S were estimated at 0.6 and 0.5 μl/h/mg, respectively. Furthermore, knockdown of ARSB attenuated the regulatory effect of efflux transporter on cellular sulfonation, whereas overexpression of ABSB enhanced the transporter effect. Taken together, the results indicated that ARSB mediated the sulfonation-transport interplay in SULT293 cells.
Division of Pharmaceutics, College of Pharmacy, Jinan University, Guangzhou, China (M.Z., S.W., B.W.); and Ocular Surface Research Center and Institute of Ophthalmology, Jinan University School of Medicine, Guangzhou, China (F.L., D.D.).
Mengjing
M
Zhao
Division of Pharmaceutics, College of Pharmacy, Jinan University, Guangzhou, China (M.Z., S.W., B.W.); and Ocular Surface Research Center and Institute of Ophthalmology, Jinan University School of Medicine, Guangzhou, China (F.L., D.D.).
Shuai
S
Wang
Division of Pharmaceutics, College of Pharmacy, Jinan University, Guangzhou, China (M.Z., S.W., B.W.); and Ocular Surface Research Center and Institute of Ophthalmology, Jinan University School of Medicine, Guangzhou, China (F.L., D.D.).
Feng
F
Li
Division of Pharmaceutics, College of Pharmacy, Jinan University, Guangzhou, China (M.Z., S.W., B.W.); and Ocular Surface Research Center and Institute of Ophthalmology, Jinan University School of Medicine, Guangzhou, China (F.L., D.D.).
Dong
D
Dong
Division of Pharmaceutics, College of Pharmacy, Jinan University, Guangzhou, China (M.Z., S.W., B.W.); and Ocular Surface Research Center and Institute of Ophthalmology, Jinan University School of Medicine, Guangzhou, China (F.L., D.D.) bj.wu@hotmail.com.
Baojian
B
Wu
D001692:Biological Transport; D057809:HEK293 Cells; D006801:Humans; D020051:N-Acetylgalactosamine-4-Sulfatase / Q000378:metabolism*; D013431:Sulfates / Q000378:metabolism*; D015238:Sulfotransferases / Q000378:metabolism*
D013431:Sulfates; D015238:Sulfotransferases; D020051:N-Acetylgalactosamine-4-Sulfatase