PMID- 25486332 OWN - NLM STAT- MEDLINE DCOM- 20150917 LR - 20200311 IS - 1879-0720 (Electronic) IS - 0928-0987 (Linking) VI - 68 DP - 2015 Feb 20 TI - Inhibitory effect of atenolol on urinary excretion of metformin via down-regulating multidrug and toxin extrusion protein 1 (rMate1) expression in the kidney of rats. PG - 18-26 LID - S0928-0987(14)00441-2 [pii] LID - 10.1016/j.ejps.2014.12.002 [doi] AB - Renal tubular secretion is an important pathway for the elimination of many clinically used drugs. Metformin, a commonly prescribed first-line antidiabetic drug, is secreted primarily by the renal tubule. Many patients with type 2 diabetes mellitus (T2DM) receiving metformin may together be given selective beta1 blockers (e.g., atenolol). Therefore, it is of great use to evaluate the effect of atenolol on metformin urinary excretion for exploring drug interactions and predicting the adverse effect of drugs. The aim of this study was to investigate the effect of atenolol on the pharmacokinetic of metformin and plasma lactate (LCA) level in rats, for high LCA is a serious adverse reaction of metformin after long-term metformin treatment. In this study, rats were treated with metformin alone or in combination with atenolol. Plasma, urine and tissue concentration of metformin was determined by HPLC method, while Western blotting and immunohistochemical analysis were used to evaluate the renal expression of rat organic cation transporter 2 (rOct2) and multidrug and toxin extrusion protein 1 (rMate1). The results showed that, after 7 days drug treatment, the AUC0 --> t of metformin in atenolol and metformin co-administration group was significantly increased by 19.5% compared to that in metformin group, while the 24h cumulative urinary excretion of metformin was significantly decreased by 57.3%. In addition, atenolol treatment significantly decreased the renal expression of rMate1, but had no effect on rOct2 expression, renal blood perfusion and glomerular filtration. Moreover, plasma LCA level in atenolol and metformin co-administration group was significantly increased by 83.3% compared to that in metformin group after 60 days drug treatment. These results indicated that atenolol can inhibit urinary excretion of metformin via decreasing renal rMate1 expression, and long-term atenolol and metformin co-administration may induce potential lactic acidosis. Our results, for the first time, provided an important experimental evidence that rMate1 is the target of transporter-mediated drug interactions concerning metformin and atenolol. CI - Copyright (c) 2014 Elsevier B.V. All rights reserved. FAU - Ma, Yan-rong AU - Ma YR AD - Department of Pharmacy, the First Hospital of Lanzhou University, Lanzhou 730000, China; School of Pharmacy, Lanzhou University, Lanzhou 730000, China. FAU - Huang, Jing AU - Huang J AD - Department of Pharmacy, the First Hospital of Lanzhou University, Lanzhou 730000, China; School of Pharmacy, Lanzhou University, Lanzhou 730000, China. FAU - Shao, Yun-yun AU - Shao YY AD - Department of Pharmacy, the First Hospital of Lanzhou University, Lanzhou 730000, China; School of Pharmacy, Lanzhou University, Lanzhou 730000, China. FAU - Ma, Kang AU - Ma K AD - Department of Pharmacy, the First Hospital of Lanzhou University, Lanzhou 730000, China; School of Pharmacy, Lanzhou University, Lanzhou 730000, China. FAU - Zhang, Guo-qiang AU - Zhang GQ AD - Department of Pharmacy, the First Hospital of Lanzhou University, Lanzhou 730000, China. FAU - Zhou, Yan AU - Zhou Y AD - Department of Pharmacy, the First Hospital of Lanzhou University, Lanzhou 730000, China. FAU - Zhi, Rao AU - Zhi R AD - Department of Pharmacy, the First Hospital of Lanzhou University, Lanzhou 730000, China. FAU - Qin, Hong-yan AU - Qin HY AD - Department of Pharmacy, the First Hospital of Lanzhou University, Lanzhou 730000, China. FAU - Wu, Xin-an AU - Wu XA AD - Department of Pharmacy, the First Hospital of Lanzhou University, Lanzhou 730000, China. Electronic address: xinanwu6511@163.com. LA - eng PT - Journal Article DEP - 20141205 PL - Netherlands TA - Eur J Pharm Sci JT - European journal of pharmaceutical sciences : official journal of the European Federation for Pharmaceutical Sciences JID - 9317982 RN - 0 (Adrenergic beta-1 Receptor Antagonists) RN - 0 (Antiporters) RN - 0 (Hypoglycemic Agents) RN - 0 (Organic Cation Transport Proteins) RN - 0 (Organic Cation Transporter 2) RN - 0 (Slc22a2 protein, rat) RN - 0 (Slc47a1 protein, rat) RN - 50VV3VW0TI (Atenolol) RN - 9100L32L2N (Metformin) SB - IM MH - Adrenergic beta-1 Receptor Antagonists/*pharmacology MH - Animals MH - Antiporters/*metabolism MH - Atenolol/*pharmacology MH - Down-Regulation MH - Drug Interactions MH - Glomerular Filtration Rate/drug effects MH - Hypoglycemic Agents/blood/*pharmacokinetics/urine MH - Kidney/blood supply/*drug effects/metabolism/physiology MH - Liver/metabolism MH - Male MH - Metformin/blood/*pharmacokinetics/urine MH - Organic Cation Transport Proteins/*metabolism MH - Organic Cation Transporter 2 MH - Rats, Wistar MH - Renal Circulation/drug effects MH - Tissue Distribution OTO - NOTNLM OT - Atenolol OT - Metformin OT - Urinary excretion OT - rMate1 OT - rOct2 EDAT- 2014/12/09 06:00 MHDA- 2015/09/18 06:00 CRDT- 2014/12/09 06:00 PHST- 2014/05/20 00:00 [received] PHST- 2014/10/10 00:00 [revised] PHST- 2014/12/01 00:00 [accepted] PHST- 2014/12/09 06:00 [entrez] PHST- 2014/12/09 06:00 [pubmed] PHST- 2015/09/18 06:00 [medline] AID - S0928-0987(14)00441-2 [pii] AID - 10.1016/j.ejps.2014.12.002 [doi] PST - ppublish SO - Eur J Pharm Sci. 2015 Feb 20;68:18-26. doi: 10.1016/j.ejps.2014.12.002. Epub 2014 Dec 5.