Introduction: Dipeptidyl peptidase-4 (DPP-4) inhibitors including alogliptin are categorised as a newer class of oral hypoglycaemic, antidiabetic drugs to suppress the degradation of incretin hormones ((glucagon-like peptide-1 (GLP-1) and glucose-dependent insulinotropic polypeptide (GIP)) by DPP-4. We have scheduled a large-scale, multicentre, prospective, observational study (Japan-Based clinical ReseArch Network for Diabetes Registry: J-BRAND Registry) to construct an extensive database over a long-term clinical course in patients with type 2 diabetes receiving oral hypoglycaemic agents (OHAs) and to evaluate the safety and efficacy of alogliptin in Japanese population.
Methods and analysis: 20,000 patients with type 2 diabetes will be registered into two groups of 10,000 each: group A patients will be treated with alogliptin, while group B patients will be treated with non-DPP-4 inhibitor OHA(s). Approximately 300 institutions nationwide will enrol and assign eligible patients equally to either group. Each patient's data will be collected every 6 months for a 3-year period, during which time treatment with OHA(s) may be changed or discontinued, as per package insert for each OHA. Primary end points are safety variables to be compared between the two groups and their subgroups, with respect to hypoglycaemia, pancreatitis, skin disorders, infections and cancer. Secondary end points are efficacy variables including from-baseline changes of A1c, fasting glucose, fasting insulin and urinary albumin, which will be compared between groups/subgroups. New onset and progression of microangiopathy will also be evaluated against OHA(s). Overall, the J-BRAND Registry will evaluate the safety and efficacy of antidiabetic OHA(s) including alogliptin, based on a large-scale database.
Ethics and dissemination: This study will be conducted with the highest respect for individual participants according to this protocol, the Declaration of Helsinki, the Ethical Guidelines for Clinical Research (Japan Ministry of Health, Labour and Welfare, 2008) and relevant laws/regulations. The present study will construct a valuable database of patients with type 2 diabetes treated with OHA(s) including alogliptin.
Trial registration number: UMIN000007976.
Keywords: DPP-4 inhibitor; alogliptin; observational study; type 2 diabetes.
Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://group.bmj.com/group/rights-licensing/permissions.