PMID- 33116039 OWN - NLM STAT- MEDLINE DCOM- 20210721 LR - 20210721 IS - 1881-784X (Electronic) IS - 1881-7831 (Linking) VI - 14 IP - 5 DP - 2020 Nov 4 TI - Effects of the linagliptin, dipeptidyl peptidase-4 inhibitor, on bone fragility induced by type 2 diabetes mellitus in obese mice. PG - 218-225 LID - 10.5582/ddt.2020.03073 [doi] AB - Recently, it has been suggested that glucose-dependent insulinotropic polypeptide (GIP) and glucagon-like peptide 1 (GLP-1), which play important roles in the homeostasis of glucose metabolism, could be involved in the regulation of bone metabolism. Inhibitors of dipeptidyl peptidase 4 (DPP-4), an enzyme that degrades GIP and GLP-1, are widely used clinically as a therapeutic agent for diabetes. However, the effects of DPP-4 inhibitors on bone metabolism remain unclear. In this study, we investigated the effects of linagliptin, a DPP-4 inhibitor, on bone fragility induced by type 2 diabetes mellitus (T2DM). Non-diabetic mice were used as controls, and T2DM mice were administered linagliptin orally on a daily basis for 12 weeks. In T2DM mice, decreased bone mineral density was observed in the lower limb bones along with low serum osteocalcin levels and high serum tartrate-resistant acid phosphatase-5b (TRAP) levels. In contrast, the decreased serum osteocalcin levels and increased serum TRAP levels observed in T2DM mice were significantly suppressed after the administration of linagliptin 30 mg/kg. Bone histomorphometric analysis revealed a reduced osteoid volume and osteoblast surface with an increase in the eroded surface and number of osteoclasts in T2DM mice. This decreased bone formation and increased bone resorption observed in the T2DM mice were suppressed and trabecular bone volume increased following the administration of 30 mg/kg linagliptin. Collectively, these findings suggest that linagliptin may improve the microstructure of trabecular bone by inhibiting both a decrease in bone formation and an increase in bone resorption induced by T2DM. FAU - Kanda, Junkichi AU - Kanda J AD - Department of Clinical Pharmacotherapy, Faculty of Pharmaceutical Sciences, Niigata University of Pharmacy and Applied Life Sciences, Niigata, Japan. FAU - Furukawa, Megumi AU - Furukawa M AD - General Health Medical Center, Yokohama University of Pharmacy, Yokohama, Japan. FAU - Izumo, Nobuo AU - Izumo N AD - General Health Medical Center, Yokohama University of Pharmacy, Yokohama, Japan. FAU - Shimakura, Taketoshi AU - Shimakura T AD - Niigata Bone Science Institute, Niigata, Japan. FAU - Yamamoto, Noriaki AU - Yamamoto N AD - Niigata Bone Science Institute, Niigata, Japan. AD - Division of Orthopedic Surgery, Niigata Rehabilitation Hospital, Niigata, Japan. FAU - Takahashi, Hideaki E AU - Takahashi HE AD - Niigata Bone Science Institute, Niigata, Japan. FAU - Wakabayashi, Hiroyuki AU - Wakabayashi H AD - Department of Clinical Pharmacotherapy, Faculty of Pharmaceutical Sciences, Niigata University of Pharmacy and Applied Life Sciences, Niigata, Japan. LA - eng PT - Journal Article DEP - 20201029 PL - Japan TA - Drug Discov Ther JT - Drug discoveries & therapeutics JID - 101493809 RN - 0 (Dipeptidyl-Peptidase IV Inhibitors) RN - 104982-03-8 (Osteocalcin) RN - 3X29ZEJ4R2 (Linagliptin) RN - 59392-49-3 (Gastric Inhibitory Polypeptide) RN - 89750-14-1 (Glucagon-Like Peptide 1) RN - EC 3.1.3.2 (Tartrate-Resistant Acid Phosphatase) SB - IM MH - Administration, Oral MH - Animals MH - Bone Density/drug effects MH - Bone and Bones/abnormalities/*drug effects/metabolism MH - Case-Control Studies MH - Diabetes Mellitus, Type 2/complications/*drug therapy MH - Dipeptidyl-Peptidase IV Inhibitors/administration & dosage/*pharmacology/therapeutic use MH - Gastric Inhibitory Polypeptide/metabolism/pharmacology MH - Glucagon-Like Peptide 1/metabolism/pharmacology MH - Linagliptin/administration & dosage/*pharmacology/therapeutic use MH - Male MH - Mice MH - Mice, Obese MH - Osteocalcin/blood/drug effects MH - Tartrate-Resistant Acid Phosphatase/blood/drug effects OTO - NOTNLM OT - Dipeptidyl peptidase-4 inhibitor OT - bone fragility OT - type 2 diabetes mellitus EDAT- 2020/10/30 06:00 MHDA- 2021/07/22 06:00 CRDT- 2020/10/29 05:42 PHST- 2020/10/30 06:00 [pubmed] PHST- 2021/07/22 06:00 [medline] PHST- 2020/10/29 05:42 [entrez] AID - 10.5582/ddt.2020.03073 [doi] PST - ppublish SO - Drug Discov Ther. 2020 Nov 4;14(5):218-225. doi: 10.5582/ddt.2020.03073. Epub 2020 Oct 29.