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We describe here a novel GPR119 agonist 24, which showed a potent and long-acting hypoglycemic effect in rats via oral dosing. For the discovery of 24, we chose compound 5, which possessed an oxadiazole linker, as a lead compound among our spirocyclic cyclohexane GPR119 agonist series, taking into account its lower plasma protein binding nature. 3,5-Difluoro and 4-methylsulfonylmethy groups on the left side phenyl group, and a gem-difluoro group on the right side of 24 are important for its agonist potency and metabolic stability, respectively., (Copyright © 2019 Elsevier Ltd. All rights reserved.)

We describe here the generation of a lead compound and its optimization studies that led to the identification of a novel GPR119 agonist. Based on a spirocyclic cyclohexane structure reported in our previous work, we identified compound 8 as a lead compound, being guided by ligand-lipophilicity efficiency (LLE), which linked potency and lipophilicity. Subsequent optimization studies of 8 for improvement of solubility afforded representative 21. Compound 21 had no inhibitory activity against six CYP isoforms and showed favorable pharmacokinetic properties and hypoglycemic activity in rats., (Copyright © 2018 Elsevier Ltd. All rights reserved.)

The aim of the present study was to determine the effects of luseogliflozin on 24-h glucose levels, assessed by continuous glucose monitoring, and on pharmacodynamic variables measured throughout the day. In this double-blind, placebo-controlled, crossover study, 37 patients with type 2 diabetes mellitus inadequately controlled with diet and exercise were randomized into two groups. Patients in each group first received luseogliflozin then placebo for 7 days each, or vice versa. After 7 days of treatment, the mean 24-h glucose level was significantly lower with luseogliflozin than with placebo [mean (95% confidence interval) 145.9 (134.4-157.5) mg/dl vs 168.5 (156.9-180.0) mg/dl; p < 0.001]. The proportion of time spent with glucose levels ≥70 to ≤180 mg/dl was significantly greater with luseogliflozin than with placebo [median (interquartile range) 83.2 (67.7-96.5)% vs 71.9 (46.9-83.3)%; p < 0.001] without inducing hypoglycaemia. The decrease in glucose levels was accompanied by reductions in serum insulin levels throughout the day., (© 2015 The Authors. Diabetes, Obesity and Metabolism published by John Wiley & Sons Ltd.)

Introduction: We investigated the possibilities of drug-drug interactions between luseogliflozin, a sodium-glucose co-transporter-2 inhibitor, and oral antidiabetic drugs (OADs) in healthy Japanese males., Methods: We conducted six independent studies to investigate potential drug-drug interactions between 5 mg luseogliflozin and the following OADs usually used in Japan: 1 mg glimepiride, 250 mg metformin, 30 mg pioglitazone, 50 mg sitagliptin, 50 mg miglitol, or 0.6 mg voglibose (0.2 mg before each meal). Twelve subjects were enrolled in each study. The glimepiride, metformin, sitagliptin, and miglitol studies were randomized, open-label, single-dose, three-way crossover studies. The pioglitazone and voglibose studies were open-label studies, where a single dose of luseogliflozin was added to multiple doses of pioglitazone or voglibose. The endpoints were the area under the curve from 0 to 24 h (AUC0-24 h) or to infinity (AUCinf) and the maximum concentration (Cmax) of each drug administered alone or in combination., Results: The 90% confidence intervals (CIs) of the geometric mean ratio (GMR) for Cmax of luseogliflozin in the pioglitazone and miglitol studies were beyond the reference range for bioequivalence (0.80-1.25) (miglitol: 0.851 [0.761, 0.952]; pioglitazone: 1.16 [1.04, 1.30]). However, the 90% CIs for AUC0-24 h were within the reference range. The 90% CIs of the GMRs for Cmax and AUC0-24 h of pioglitazone were beyond the reference range (Cmax 0.884 [0.746, 1.05]; AUC0-24 h 0.896 [0.774, 1.04]), but the 90% CIs for the active metabolites of pioglitazone were within the reference range. For the other combinations tested, the 90% CIs and GMRs for luseogliflozin and the individual OADs were within the reference range., Conclusion: No clinically meaningful interactions were observed between luseogliflozin and six commonly used OADs in Japan, although there were some changes in the pharmacokinetics of pioglitazone co-administered with luseogliflozin and for luseogliflozin co-administered with miglitol or pioglitazone., Funding: Taisho Pharmaceutical Co., Ltd.

Introduction: Luseogliflozin, a potent, selective sodium glucose cotransporter 2 inhibitor, promotes urinary glucose excretion (UGE) and reduces plasma glucose concentrations. Luseogliflozin was approved for use in Japan after favorable pharmacokinetic, pharmacodynamic, and safety profiles were reported in healthy Japanese subjects and patients with type 2 diabetes mellitus (T2DM) in clinical development studies. We aimed to investigate the pharmacokinetics, pharmacodynamics, and safety of multiple doses of luseogliflozin administered once daily for 7 days in Japanese patients with T2DM., Methods: We conducted a randomized, placebo-controlled, single-blind, parallel-group, clinical pharmacology study at the P-One Clinic, Keikokai Medical Corporation (Tokyo, Japan) between August 2009 and November 2009. Forty Japanese patients with T2DM were randomly assigned to receive once-daily 0.5, 1, 2.5 or 5 mg luseogliflozin or placebo for 7 days. We assessed the pharmacokinetics, pharmacodynamics (including changes in UGE and plasma glucose concentrations), and safety of luseogliflozin., Results: The plasma concentrations of luseogliflozin and its active metabolite, M2, were dose proportional, without accumulation. 24-h UGE was greater in all luseogliflozin groups versus placebo. Least-squares mean differences in 24-h UGE on Day 7 increased dose dependently in the luseogliflozin groups, with values of 49.2, 66.5, 89.4, and 101 g/day at 0.5, 1, 2.5, and 5 mg, respectively. On Day 7, the areas under the concentration-time curves for post-meal plasma glucose and the mean plasma glucose for 0-16 h were significantly lower in all luseogliflozin groups versus placebo. Seven patients had mild adverse events (AEs); all were resolved. No AEs led to study discontinuation., Conclusion: Once-daily administration of luseogliflozin for 7 days increased 24-h UGE in a dose-dependent manner, reduced plasma glucose concentrations, and was well tolerated in Japanese patients with T2DM. The pharmacokinetic and pharmacodynamic profile of luseogliflozin observed in this study supports its once-daily dosing regimen., Funding: Taisho Pharmaceutical Co., Ltd.

Luseogliflozin, a selective sodium glucose cotransporter 2 inhibitor, was demonstrated in a previous 24-week study of type 2 diabetic patients to be efficacious and well tolerated. This study mainly aimed to evaluate the long-term safety of luseogliflozin monotherapy in Japanese type 2 diabetic patients based on the Japanese guidelines. Additionally, long-term efficacy was also evaluated. Patients on diet and exercise therapy alone with an HbA1c of 6.9-10.5% received luseogliflozin 2.5 mg once daily for 52 weeks. For patients with insufficient glycemic control, this dose was able to be increased to 5 mg at Week 24. Adverse events (AEs), clinical laboratory tests, vital signs and 12-lead electrocardiograms were used to assess safety. Efficacy endpoints consisted of changes in HbA1c, fasting plasma glucose (FPG), and body weight from baseline. Of 299 patients who received luseogliflozin, 279 completed the study. Most AEs were mild in severity with incidences of AEs and adverse drug reactions at 75.3% and 16.7%, respectively. Although hypoglycemia was observed in 7 patients (2.3%), no major hypoglycemic episodes occurred. The incidences of AEs of special interest, including pollakiuria, volume depletion and urinary tract/genital infections, were at acceptable levels. Luseogliflozin significantly lowered HbA1c (-0.50%, P< 0.001), FPG (-16.3 mg/dL, P< 0.001) and body weight (-2.68 kg, P< 0.001) at Week 52 compared to baseline. Up-titration to 5 mg further improved glycemic control. In this long-term study of Japanese type 2 diabetic patients, luseogliflozin monotherapy was well tolerated for 52 weeks and provided a sustained glycemic lowering effect and reduced body weight.

Objectives: Luseogliflozin is a selective sodium glucose cotransporter 2 inhibitor under development for the treatment of type 2 diabetes mellitus (T2DM). This phase II study was conducted to confirm the efficacy and safety of luseogliflozin monotherapy at doses of up to 10 mg in Japanese patients with T2DM., Patients and Methods: Patients with hemoglobin A1c (HbA1c) of 6.9-10.5% on diet therapy were randomized in a double-blind manner to treatment with 1, 2.5, 5, or 10 mg luseogliflozin or placebo for 12 weeks (n = 56, 56, 54, 58, and 58, respectively)., Trial Registration: Japan Pharmaceutical Information Center (identifier: Japic CTI-101191)., Main Outcome Measures: The primary endpoint was the change in HbA1c from baseline to the end of treatment. Other endpoints included fasting plasma glucose (FPG), postprandial plasma glucose (PPG) and body weight. Adverse events were recorded throughout the study., Results: HbA1c decreased significantly at the end of treatment in the 1, 2.5, 5, and 10 mg luseogliflozin groups compared with placebo (-0.29, -0.39, -0.46, and -0.43%, respectively, versus +0.22%; all P < 0.001), as did FPG and PPG (all P < 0.001). Body weight also decreased significantly in all luseogliflozin groups compared with placebo (all P < 0.001). The incidence rates of adverse events (40.0-50.0%) were not significantly different among the five groups. The overall incidence of hypoglycemia was low. Limitations of this study include the short study duration and the relatively small sample size., Conclusions: In Japanese patients with T2DM, luseogliflozin was well tolerated, improved glycemic control, and reduced body weight over 12 weeks of treatment at all tested doses. Doses of ≥2.5 mg achieved similar improvements in glycemic control.

Objective: Luseogliflozin--a novel, orally bioavailable, 1-thio-D-glucitol derivative and a selective sodium glucose cotransporter 2 inhibitor--has shown efficacy and tolerability in previous phase 2 studies. This phase 3, randomized, double-blind, placebo-controlled, comparative study aimed to confirm the superiority of 24 week luseogliflozin 2.5 mg monotherapy over placebo in reducing hemoglobin A1c (HbA1c) levels in Japanese patients with type 2 diabetes mellitus (T2DM)., Methods: Patients with HbA1c levels of 6.9%-10.5% were randomized to receive luseogliflozin 2.5 mg or placebo once daily for 24 weeks (n = 79 in each group). The primary endpoint was change from baseline in HbA1c at end of treatment. Secondary endpoints included change from baseline in fasting plasma glucose (FPG) and postprandial plasma glucose (PPG) following a meal tolerance test, body weight, and abdominal circumference. Safety assessments included adverse events (AEs), clinical laboratory tests, and vital signs., Results: At the end of treatment, HbA1c was significantly decreased from baseline in the luseogliflozin 2.5 mg group (-0.63%) versus the placebo group (0.13%), with a between-group difference of -0.75% (p < 0.001). Additionally, significant reductions in FPG, PPG, body weight, and abdominal circumference were noted with luseogliflozin compared with placebo (all p < 0.05). Luseogliflozin was well tolerated; there was no significant difference between groups in the incidence of AEs (luseogliflozin, 59.5%; placebo, 57.0%). No AEs led to study drug discontinuation. Most AEs were mild in severity, with no severe AE reported. Limitations of this study include its short study duration and small sample size., Conclusion: Luseogliflozin monotherapy for 24 weeks was superior to placebo in reducing HbA1c levels. It also reduced FPG, PPG, body weight, and abdominal circumference and was well tolerated in Japanese patients with T2DM., Clinical Trial Registration: JapicCTI-111661.

Context: Maillard reaction is implicated in the development of pathophysiology in age-related diseases. The search for newer Maillard reaction inhibitors is a priority among strategies to combat diabetes complications., Objective: To evaluate the inhibitory potential of hesperidin, its derivatives and their stereoisomers against advanced glycation end-products (AGEs) formation., Materials and Methods: Hesperidin and hesperetin were chirally separated and the inhibitory effects of 1:1 mixture of (2S)- and (2R)-hesperidin (1), (2S)-hesperidin (2), (2R)-hesperidin (3), 1:1 mixture of (S)- and (R)-hesperetin (4), (S)-hesperetin (5), (R)-hesperetin (6), and monoglucosyl hesperidin (7) [1:1 mixture of (2S)-glucosyl hesperidin (8) and (2R)-glucosyl hesperidin (9)] at a concentration of 1 mM on protein glycation reaction have been revealed using the newly constructed RNase A-methylglyoxal (MGO) assay for the early stage and the bovine serum albumin (BSA)-glucose assay for the late stage of Maillard reaction., Results: This study has demonstrated that hesperidin and its derivatives possessed relatively strong activity against the formation of AGEs. (S)-Hesperetin (5) possessed the highest inhibitory rate up to 57.4% in BSA-glucose assay, 38.2% in RNase A-MGO assay., Discussion and Conclusion: The new RNase A-MGO assay system could be used for the screening of AGEs inhibitors and hesperidin, and its derivatives could be promising candidate adjuvants for the treatment of diabetes complication, and age-related chronic diseases.