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第43卷第8期
               ·1046 ·                           南 京    医 科 大 学 学         报                        2023年8月


              胞分化早期下调 VPS13A 的表达,而在分化中后期                        [7] CAI S,WU Y,GUILLEN⁃SAMANDER A,et al. In situ ar⁃
             (第 4 天开始),VPS13A 的表达逐渐上调,因此推测                           chitecture of the lipid transport protein VPS13C at ER ⁃
              VPS13A在脂肪细胞分化过程中可能发挥作用。于                               lysosome membrane contacts[J]. Proc Natl Acad Sci U S
                                                                     A,2022,119(29):3769-3778
              是运用 CRISPR/Cas9 系统构建了稳定敲降 VPS13A
                                                                [8] YESHAW W M,VAN DER ZWAAG M,PINTO F,et al.
              的3T3⁃L1单克隆细胞系用于研究VPS13A在脂肪生
                                                                     Human VPS13A is associated with multiple organelles
              成中的作用。本研究首先将对照组细胞和稳定敲
                                                                     and influences mitochondrial morphology and lipid drop⁃
              降 VPS13A 的 3T3⁃L1 单克隆细胞进行了诱导分化,
                                                                     let motility[J]. eLife,2019,8(37):31-68
              于光学显微镜下观察经过诱导分化8 d后细胞的形                           [9] BOU MALHAB L J,ABDEL ⁃ RAHMAN W M. Obesity
              态。结果表明,敲降 VPS13A 的 3T3⁃L1 细胞内分化                        and inflammation:colorectal cancer engines[J]. Curr Mol
              程度更高,脂滴生成更多。该结果初步说明了                                   Pharmacol,2022,15(4):620-646
              VPS13A在脂肪细胞分化过程中的重要作用。为了                          [10] CHOOI Y C,DING C,MAGKOS F. The epidemiology of
              进一步探究VPS13A在脂肪生成和分化中起到的作                               obesity[J]. Metabolism,2019,92:6-10
              用,将对照组细胞和稳定敲降 VPS13A 的 3T3⁃L1 细                   [11] SPALDING K L,ARNER E,WESTERMARK P O,et al.
                                                                     Dynamics of fat cell turnover in humans[J]. Nature,
              胞系进行诱导分化后,BODIPY 和油红染脂滴观察
                                                                     2008,453(7196):783-787
              细胞的脂滴情况,同时用Western blot检测细胞分化
                                                                [12] AUDANO M,PEDRETTI S,CARUSO D,et al. Regulato⁃
              前后VPS13A及脂肪细胞分化标志物蛋白的表达变
                                                                     ry mechanisms of the early phase of white adipocyte dif⁃
              化,结果显示,VPS13A敲降的细胞分化到第8天时,
                                                                     ferentiation:an overview[J]. Cell Mol Life Sci,2022,79
              分化程度更高,且分化标志物蛋白CEBPβ和PPARγ                            (3):139-153
              均升高,提示 VPS13A 在脂肪的生成中发挥了促进                        [13] BAHMAD H F,DAOUK R,AZAR J,et al. Modeling adi⁃
              作用。但是VPS13A是如何调控脂滴的数量和脂肪                               pogenesis:current and future perspective[J]. Cells,
              生成以及VPS13A如何影响到PPARγ蛋白表达水平                             2020,9(10).2326-2347
              的变化仍需要进一步的研究探索。本研究通过对                             [14] ZHAO G N A,TIAN Z W,TIAN T,et al. TMBIM1 is an
              3T3⁃L1细胞分化过程中VPS13A的表达水平及调控                            inhibitor of adipogenesis and its depletion promotes adipo⁃
              的初步探索,为 VPS13A 在脂肪细胞中的功能和作                             cyte hyperplasia and improves obesity⁃related metabolic
                                                                     disease[J]. Cell Metab,2021,33(8):1640-1654
              用机制提供了实验基础。
                                                                [15] REINISCH K M,PRINZ W A. Mechanisms of nonvesicu⁃
             [参考文献]                                                  lar lipid transport[J]. J Cell Biol,2021,220(3).2058-2069
                                                                [16] MONTEIRO⁃CARDOSO V F,ROCHIN L,ARORA A,et
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                   2425-2436                                                                   (本文编辑:唐      震)
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