利拉鲁肽通过 miR-150-5p/GDF11 轴减少糖尿病大鼠骨髓脂肪生成。
Liraglutide reduces bone marrow adipogenesis by miR-150-5p/ GDF11 axis in diabetic rats.
机构信息
Department of Endocrinology, The Hebei Medical University Third Hospital, Qiaoxi District, No. 139 Ziqiang Road, Shijiazhuang, 050051, China; NHC Key Laboratory of Intelligent Orthopedic Equipment (The Third Hospital of Hebei Medical University), Qiaoxi District, No. 139 Ziqiang Road, Shijiazhuang, 050051, China.
Department of Endocrinology, The Hebei Medical University Third Hospital, Qiaoxi District, No. 139 Ziqiang Road, Shijiazhuang, 050051, China; Department of Orthopedic Surgery, The Hebei Medical University Third Hospital, Qiaoxi District, No. 139 Ziqiang Road, Shijiazhuang, 050051, China.
出版信息
Eur J Pharmacol. 2024 Sep 5;978:176793. doi: 10.1016/j.ejphar.2024.176793. Epub 2024 Jul 2.
In recent years, a common-used antidiabetic drug, liraglutide, was identified with extra effects on lipid metabolism. Its effects against excessive lipid deposition in bone marrow were gained much attention but not well established. Our aim in the present study is to explore the interaction of miRNAs-mRNAs altered by liraglutide administration during bone marrow adipogenesis in diabetes. To establish the diabetic animal model, rats were treated with high fat diet (HFD) and STZ injection. We then identified the lowering effect of liraglutide on lipids metabolism in the diabetes. During this process, high-throughput sequencing and bioinformatics analyses on miRNAs extracted from bone marrow mesenchymal stem cells (BMSCs) were conducted after liraglutide administration. We then identified five differentially expressed miRNAs (miRNA-150-5p, miRNA-129-5p, miRNA-201-3p, miRNA-201-5p, and miRNA-214-5p). The expressions of the DE miRNAs were verified as temporal specific expression patterns in Day 3 and in Day 7. Among them, miRNA-150-5p expression was more stable and consistent with the sequencing data. Of interest, miR-150-5p overexpression facilitated adipogenesis of BMSCs. But this promotion was alleviated by liraglutide. The predicted target gene of miR-150-5p, GDF11, was validated to be involved in liraglutide alleviated BMSCs' lipid accumulation in diabetes. In vitro, liraglutide increased the GDF11 expression, rescued its down-expression by siGDF11 and inhibit the adipogenesis of BMSCs cultured in high glucose medium. In vivo, liraglutide reversed the HFD-STZ induced excessive lipid droplets by up-regulation of GDF11 expression, which was discounted by agomiR-150-5p injection. Above all, liraglutide might alleviate bone marrow fat accumulation via inactivating miR-150-5p/GDF11 axis in diabetes.
近年来,一种常用的抗糖尿病药物利拉鲁肽被发现对脂质代谢有额外的作用。其对抗骨髓中过多脂质沉积的作用引起了广泛关注,但尚未得到充分证实。我们本研究的目的是探讨利拉鲁肽给药在糖尿病骨髓脂肪生成过程中改变的 miRNA-mRNA 之间的相互作用。为了建立糖尿病动物模型,大鼠接受高脂肪饮食(HFD)和 STZ 注射。然后,我们确定了利拉鲁肽对糖尿病脂质代谢的降低作用。在此过程中,对利拉鲁肽给药后从骨髓间充质干细胞(BMSCs)中提取的 miRNAs 进行高通量测序和生物信息学分析。然后,我们鉴定了五个差异表达的 miRNAs(miRNA-150-5p、miRNA-129-5p、miRNA-201-3p、miRNA-201-5p 和 miRNA-214-5p)。DE miRNAs 的表达在第 3 天和第 7 天表现出时间特异性表达模式。其中,miRNA-150-5p 的表达更稳定且与测序数据一致。有趣的是,miR-150-5p 的过表达促进了 BMSCs 的脂肪生成。但这种促进作用被利拉鲁肽减轻。miR-150-5p 的预测靶基因 GDF11 被验证参与了利拉鲁肽减轻糖尿病中 BMSCs 脂质积累的过程。在体外,利拉鲁肽增加了 GDF11 的表达,挽救了 siGDF11 对其表达的下调,并抑制了高糖培养基中培养的 BMSCs 的脂肪生成。在体内,利拉鲁肽通过上调 GDF11 表达逆转了 HFD-STZ 诱导的过多脂质滴,而 agomiR-150-5p 注射则削弱了这种作用。总之,利拉鲁肽可能通过在糖尿病中失活 miR-150-5p/GDF11 轴来减轻骨髓脂肪堆积。