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第42卷第3期                           南京医科大学学报(自然科学版)
                  2022年3月                   Journal of Nanjing Medical University(Natural Sciences)     ·325 ·


               ·基础研究·

                MiR⁃484通过靶向MAPK8抑制人前体脂肪细胞的增殖与分化



                仲逢钰,秦振英,李          婧,田 甜,牟雨虹,田慧琴,胡幼芳              *
                南京医科大学第一附属医院儿童保健科,江苏 南京                   210029




               [摘   要] 目的:探讨miRNA⁃484在肥胖发生中的作用及其临床意义。方法:利用RT⁃qPCR 、CCK⁃8法、油红O染色及甘油三
                酯定量检测研究miR⁃484对人脂肪细胞增殖及成脂分化的作用。运用Targetscan7.2对miR⁃484的下游靶基因进行预测分析,并使
                用双荧光素酶实验验证miR⁃484与靶基因的结合,使用Western blot及RT⁃qPCR验证miR⁃484对靶基因的作用。结果:miR⁃484在
                人脂肪细胞分化成熟过程中逐渐低表达。过表达miR⁃484抑制人前体脂肪细胞的增殖及分化,而沉默miR⁃484与过表达作用
                相反。生物信息学预测发现MAPK8是miR⁃484的下游靶基因,且miR⁃484可抑制其mRNA及蛋白表达,同时过表达MAPK8可
                部分挽救miR⁃484对人前体脂肪细胞增殖分化的抑制。结论:miR⁃484可以通过抑制MAPK8的表达从而抑制人前体脂肪细胞
                的增殖与成脂分化。
               [关键词] miR⁃484;人前体脂肪细胞;增殖;成脂分化;肥胖

               [中图分类号] R589.2                   [文献标志码] A                       [文章编号] 1007⁃4368(2022)03⁃325⁃08
                doi:10.7655/NYDXBNS20220303



                MiR⁃484 inhibits human pre⁃adipocyte differentiation and proliferation by targeting MAPK8

                ZHONG Fengyu,QIN Zhenying,LI Jing,TIAN Tian,MU Yuhong,TIAN Huiqin,HU Youfang *
                Department of Child Health Care,the First Affiliated Hospital of Nanjing Medical University,Nanjing 210029,China



               [Abstract] Objective:This study aims to investigate the role of miR⁃484 in adipogenesis and its clinical potentiality. Methods:To
                explore the function of miR⁃484 in human pre⁃adipocyte(HPA)differentiation and proliferation,RT⁃qPCR,CCK⁃8,red oil staining and
                triglyceride content assays were conducted. Additionally,a dual⁃luciferase reporter assay demonstrated MAPK8,which predicted by
                Targetscan7.2,was a direct target gene of miR⁃484 during preadipocyte differentiation,and the results were confirmed by RT⁃qPCR
                and Western blot. Results:The miR⁃484 was down⁃regulated during HPA differentiation. The miR⁃484 inhibited the proliferation and
                differentiation in HPA,and silencing miR⁃484 had the opposite effects. A dual⁃luciferase reporter assay demonstrated MAPK8 was a
                direct target gene of miR⁃484. Additionally,over expression of MAPK8 could reserve the negative effect of miR⁃484 on differentiation
                and proliferation of pre⁃adipocytes. Conclusion:MiR⁃484 could inhibit HPA differentiation and proliferation by targeting MAPK8.
               [Key words] miR⁃484;human pre⁃adipocyte;proliferation;adipogenic differentiation;obesity
                                                                              [J Nanjing Med Univ,2022,42(03):325⁃332]





                    世界卫生组织报道,自 1975 年以来,全球肥胖                      代谢紊乱相关疾病的发生,如2型糖尿病、非酒精性
                人数几乎增加了两倍,现共有 6 000 万 5 岁以下儿                      脂肪肝和心血管疾病          [2- 3] 。脂肪组织不仅是储能器
                童患上肥胖症,肥胖已成为一个严重的公共健康问                            官,为人体的生命活动提供能量,也是人体重要的
                  [1]
                题 。肥胖以脂肪大量堆积为特征,并可导致多种                            内分泌器官,可分泌多种细胞因子,具有重要生理
                                                                  功能  [4- 5] 。然而,由于能量摄入与消耗的不平衡,大
                                                                  量能量以甘油三酯的形式储存,脂肪组织迅速膨
               [基金项目] 国家自然科学基金(81700707);江苏省妇幼健
                                                                  胀,脂肪组织的扩张将导致炎性细胞因子分泌增
                康科研项目面上项目(F201804)
                                                                  加,并减少瘦素和脂联素等抗炎蛋白的分泌,从而
                ∗
                通信作者(Corresponding author),E⁃mail:13182823903@163.
                com                                               导致代谢紊乱      [6-7] 。因此,深入研究脂肪组织的生成
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