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Guo L, Tian F, Liu L, Chen M, Jiang C, Li S, Liu C, Zhang Y, Qin J, Yu D, Zong Y, Dai W. Retagliptin as add-on therapy to metformin in Chinese patients with type 2 diabetes inadequately controlled with metformin: A multicentre, randomized, double-blind, placebo-controlled, phase 3 trial. Diabetes Obes Metab 2024. [PMID: 38602409 DOI: 10.1111/dom.15601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/24/2024] [Revised: 03/27/2024] [Accepted: 03/27/2024] [Indexed: 04/12/2024]
Abstract
AIM To evaluate the efficacy and safety of retagliptin in Chinese patients with type 2 diabetes (T2D) inadequately controlled with metformin. MATERIALS AND METHODS This multicentre, phase 3 trial consisted of a 16-week, randomized, double-blind, placebo-controlled period, where patients with HbA1c levels between 7.5% and 11.0% were randomized to receive either once-daily (QD) retagliptin 100 mg (n = 87) or placebo (n = 87), both as an add-on to metformin. The primary endpoint was the change in HbA1c from baseline to week 16. RESULTS At week 16, the least squares mean change in HbA1c from baseline, compared with placebo, was -0.82% (95% CI, -1.05% to -0.58%) for the retagliptin 100 mg QD group (P < .0001) per treatment policy estimand. Significantly higher proportions of patients in the retagliptin 100 mg QD group achieved HbA1c levels of less than 6.5% (11.5%) and less than 7.0% (26.4%) compared with those receiving placebo (0% and 4.6%; P = .0016 and P < .0001, respectively) at week 16. Retagliptin 100 mg QD also lowered fasting plasma glucose and 2-hour postprandial plasma glucose levels. The incidence of adverse events (AEs) during the treatment period was similar between the two groups. However, slightly higher proportions of increased lipase and increased amylase in the retagliptin 100 mg QD group were observed. No patients discontinued treatment permanently because of AEs, and no episodes of severe hypoglycaemia were reported. CONCLUSIONS Retagliptin 100 mg QD as an add-on therapy to metformin offers a new therapeutic option for treating Chinese patients with T2D inadequately controlled by metformin alone, and is generally well tolerated.
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Affiliation(s)
- Lixin Guo
- Department of Endocrinology, Beijing Hospital; National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Science, Beijing, China
| | - Fengsheng Tian
- Department of Endocrinology, Hebei Province Cangzhou Hospital of Integrated Traditional Chinese Medicine-Western Medicine, Cangzhou, China
| | - Li Liu
- Department of Endocrinology, The First Hospital of Hebei Medical University, Shijiazhuang, China
| | - Mingwei Chen
- Department of Endocrinology, The First Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Chengxia Jiang
- Department of Endocrinology, The Second People's Hospital of Yibin, Yibin, China
| | - Shuangqing Li
- Department of General practice, West China Hospital, Chengdu, China
| | - Cong Liu
- Department of Endocrinology, Shengjing Hospital of China Medical University, Shenyang, China
| | - Yawei Zhang
- Department of Endocrinology, Pingxiang People's Hospital, Pingxiang, China
| | - Jie Qin
- Department of Endocrinology, Shanxi Provincial People's Hospital, Taiyuan, China
| | - Dongni Yu
- Department of Endocrinology, Beijing Hospital; National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Science, Beijing, China
| | - Yicen Zong
- Clinical Research and Development, Jiangsu Hengrui Pharmaceuticals Co., Ltd, Shanghai, China
| | - Wei Dai
- Clinical Research and Development, Jiangsu Hengrui Pharmaceuticals Co., Ltd, Shanghai, China
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Abstract
INTRODUCTION DPP-4 inhibitors are a class of compounds used for the treatment of type 2 diabetes. The drugs inhibit the degradation of GLP-1, thus amplifying the incretin effect. They have moderate glycemic efficacy, a low propensity of causing hypoglycaemia and are weight neutral. The drugs are often used as second line therapy after metformin. Areas covered: This review summarizes the available compounds in the market and discusses the novel compounds that are currently under development. Several large cardiovascular outcome trials with some of the compounds have been completed, and their results and implications are considered. Fixed dose combination pills are currently the main focus of research and the contribution of these to the care of patients with diabetes is further discussed. Expert opinion: The DPP-4 inhibitors have been a successful class in drug development for diabetes. Taken orally and available as fixed dose combinations with metformin or with SGLT-2 inhibitors, they have reached a large market share of over 7 billion dollars. Other than retagliptin, it does not appear that any additional compound will be launched soon. Currently, the main focus is on the development of additional fixed dose combinations with SGLT-2 inhibitors, but the success of these combinations remains to be seen.
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Affiliation(s)
- Avivit Cahn
- a The Diabetes Research Unit, Internal Medicine Section , Hadassah Hebrew University Hospital , Jerusalem , Israel.,b Endocrinology and Metabolism Unit, Internal Medicine Section , Hadassah Hebrew University Hospital , Jerusalem , Israel
| | - Simona Cernea
- c Department M3/Internal Medicine IV , University of Medicine and Pharmacy , Târgu Mureş , Romania.,d Diabetes, Nutrition and Metabolic Diseases Unit , Emergency County Clinical Hospital , Târgu Mureş , Romania
| | - Itamar Raz
- a The Diabetes Research Unit, Internal Medicine Section , Hadassah Hebrew University Hospital , Jerusalem , Israel
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