{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,8]],"date-time":"2026-07-08T16:22:58Z","timestamp":1783527778327,"version":"3.55.0"},"reference-count":47,"publisher":"Bioscientifica","issue":"2","license":[{"start":{"date-parts":[[2026,6,15]],"date-time":"2026-06-15T00:00:00Z","timestamp":1781481600000},"content-version":"vor","delay-in-days":134,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["journals.bioscientifica.com"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2026,2,1]]},"abstract":"<jats:p>Incretins, glucose-dependent insulinotropic polypeptide (GIP) and glucagon-like peptide-1 (GLP-1) have been shown to improve hyperglycemia in patients with type 2 diabetes, suggesting that an enhanced capacity of GIP and GLP-1 production could be beneficial in type 2 diabetes. We have recently found that dual-specificity tyrosine phosphorylation-regulated kinase (DYRK) inhibitors reduce glucose levels and increase the number of intestinal gip-expressing K-cells and glp-1-expressing L-cells in zebrafish. However, their effects on mammals require exploration in greater detail. In this study, we examined whether oral administration of a DYRK inhibitor, ID-8, to diabetic db\/db mice affects glucose homeostasis, plasma levels of insulin, incretins, number of intestinal K-cells and L-cells and pancreatic cell volume in vivo. ID-8-treated mice showed a significant reduction in HbA1c levels and decreased blood glucose levels after oral glucose tolerance test along with enhanced plasma levels of insulin, total-GIP and total-GLP-1. The number of K-cells and L-cells in the intestines of ID-8-treated mice was increased, and a subset of these cells were co-stained with a DYRK-regulated transcriptional factor, nuclear factor of activated T cells 4 (NFATc4), but not co-localized with the proliferation marker EdU. There were no significant differences of pancreatic \u03b2- and \u03b1-cell mass between the ID-8- and vehicle-treated mice. Moreover, mRNA levels of incretins were significantly increased in ID-8-treated human intestinal organoids. Our present study demonstrated that ID-8 improved hyperglycemia in association with enhanced plasma levels of insulin and incretins as well as an increased number of K-cells and L-cells in diabetic mice; therefore, it may be a novel therapeutic agent for diabetes.<\/jats:p>","DOI":"10.1530\/jme-25-0214","type":"journal-article","created":{"date-parts":[[2026,2,19]],"date-time":"2026-02-19T12:41:13Z","timestamp":1771504873000},"update-policy":"https:\/\/doi.org\/10.1530\/crossmarkpolicy-6","source":"Crossref","is-referenced-by-count":0,"title":["A DYRK inhibitor ameliorates glucose homeostasis and increases incretin-producing cells in diabetic 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