中国组织工程研究 ›› 2024, Vol. 28 ›› Issue (13): 2076-2081.doi: 10.12307/2024.117

• 干细胞基础实验 basic experiments of stem cells • 上一篇    下一篇

溶质载体家族2成员12干预尿酸诱导肾小管细胞的损伤

贺  怡1,2,李晓林1,何金科1,蒋香菊1,梁美婷1,2,陈邬锦2,崔月娜2,孙玉萍2   

  1. 1新疆第二医学院,新疆维吾尔自治区克拉玛依市   834000;2新疆医科大学基础医学院,新疆维吾尔自治区乌鲁木齐市   830000
  • 收稿日期:2022-11-02 接受日期:2023-03-14 出版日期:2024-05-08 发布日期:2023-08-28
  • 通讯作者: 孙玉萍,博士,教授,新疆医科大学基础医学院,新疆维吾尔自治区乌鲁木齐市 830000
  • 作者简介:贺怡,女,1989年生,新疆维吾尔自治区霍城县人,汉族,2014年石河子大学毕业,硕士,副教授,主要从事尿酸代谢研究。
  • 基金资助:
    新疆维吾尔自治区高校科研计划(XJEDU2021Y054),项目负责人:贺怡

Solute carrier family 2 member 12 intervenes in uric acid-induced renal tubular cell injury

He Yi1, 2, Li Xiaolin1, He Jinke1, Jiang Xiangju1, Liang Meiting1, 2, Chen Wujin2, Cui Yuena2, Sun Yuping2   

  1. 1Xinjiang Second Medical College, Karamay 834000, Xinjiang Uygur Autonomous Region, China; 2School of Basic Medical Sciences, Xinjiang Medical University, Urumqi 830000, Xinjiang Uygur Autonomous Region, China
  • Received:2022-11-02 Accepted:2023-03-14 Online:2024-05-08 Published:2023-08-28
  • Contact: Sun Yuping, MD, Professor, School of Basic Medical Sciences, Xinjiang Medical University, Urumqi 830000, Xinjiang Uygur Autonomous Region, China
  • About author:He Yi, Master, Associate professor, Xinjiang Second Medical College, Karamay 834000, Xinjiang Uygur Autonomous Region, China; School of Basic Medical Sciences, Xinjiang Medical University, Urumqi 830000, Xinjiang Uygur Autonomous Region, China
  • Supported by:
    Scientific Research Program of Xinjiang Uygur Autonomous Region Universities, No. XJEDU2021Y054 (to HY)

摘要:


文题释义:

高尿酸血症:是一种嘌呤代谢紊乱性疾病,导致血清尿酸升高。过量的血清尿酸水平可使尿酸晶体在关节的结缔组织中沉淀导致痛风性关节炎,在肾小管中沉淀导致急性肾小管坏死。GLUT12具有尿酸转运功能,在尿酸平衡中起主要作用,但其具体作用机制尚不明确。
AKT/FOXO3a途径:Foxo3a作为参与调节中枢基础细胞功能的关键蛋白,其功效受到磷酸化的调节。AKT可以磷酸化Foxo3a并使其失活,导致Foxo3a滞留在细胞质中,抑制靶基因的转录。Foxo3a激活可改善肾间质纤维化、氧化应激和炎症信号,从而在慢性肾病中发挥保护性作用。


背景:近年来,由嘌呤代谢紊乱引起的高尿酸血症的发病率不断增加,可诱导炎症反应并导致肾损伤。

目的:探讨溶质载体家族2成员12(solute carrier family 2 member 12,SLC2A12)在高尿酸相关肾损伤中的作用和机制。
方法:将肾小管细胞(HK2细胞)分为5组:HK2组、HK2+尿酸组、HK2+尿酸+NC组、HK2+尿酸+siSLC2A12组、HK2+尿酸+siSLC2A12+MK-2206组。用尿酸处理HK2细胞后转染siRNA SLC2A12,再通过MK-2206处理抑制AKT表达。采用CCK-8检测细胞增殖能力,TUNEL检测细胞凋亡情况,qRT-PCR和Western blot检测纤维化因子以及AKT/FOXO3a途径相关因子的表达,酶联免疫吸附实验检测细胞上清液中炎性细胞因子水平。

结果与结论:①与HK2组比较,HK2+尿酸组细胞增殖能力降低,细胞凋亡增多,HK2+尿酸+siSLC2A12组细胞增殖能力进一步降低,凋亡细胞进一步增多;与HK2+尿酸+siSLC2A12组比较,HK2+尿酸+siSLC2A12+MK-2206组细胞增殖能力升高,凋亡细胞减少;②与HK2组比较,HK2+尿酸组细胞中结缔组织生长因子、α-平滑肌肌动蛋白、转化生长因子β表达升高,HK2+尿酸+siSLC2A12组3种因子表达进一步升高;与HK2+尿酸+siSLC2A12组比较,HK2+尿酸+siSLC2A12+MK-2206组3种因子表达有所下降;③与HK2组比较,HK2+尿酸组p-AKT、FOXO3a、p-FOXO3a表达升高,HK2+尿酸+siSLC2A12组p-AKT表达进一步升高,而FOXO3a、p-FOXO3a表达下降;与HK2+尿酸+siSLC2A12组比较,HK2+尿酸+siSLC2A12+MK-2206组p-AKT表达下降,FOXO3a、p-FOXO3a表达升高;④与HK2组比较,HK2+尿酸组白细胞介素6、白细胞介素1β、肿瘤坏死因子α分泌水平升高,HK2+尿酸+siSLC2A12组白细胞介素6、白细胞介素1β、肿瘤坏死因子α水平进一步升高;与HK2+尿酸+siSLC2A12组比较,HK2+尿酸+siSLC2A12+MK-2206组白细胞介素6、白细胞介素1β、肿瘤坏死因子α水平下降;⑤结果表明,SLC2A12可能通过激活FOXO3a途径抵抗尿酸诱导的肾小管纤维化及炎症反应,从而保护高尿酸血症诱导的肾脏损伤。

https://orcid.org/0000-0002-6854-9011 (贺怡) 

中国组织工程研究杂志出版内容重点:干细胞;骨髓干细胞;造血干细胞;脂肪干细胞;肿瘤干细胞;胚胎干细胞;脐带脐血干细胞;干细胞诱导;干细胞分化;组织工程

关键词: 高尿酸血症, SLC2A12, AKT, FOXO3a, 信号通路, 纤维化

Abstract: BACKGROUND: In recent years, the incidence of hyperuricemia caused by purine metabolism disorders has been increasing, which can induce inflammatory responses and lead to renal injury.  
OBJECTIVE: To explore the role and mechanism of solute carrier family 2 member 12 (SLC2A12) in hyperuricemia-related renal injury. 
METHODS: Renal tubular cells (HK2 cells) were divided into five groups: HK2 group, HK2+uric acid group, HK2+uric acid+NC group, HK2+uric acid+siSLC2A12 group, and HK2+uric acid+siSLC2A12+MK-2206 group. HK2 cells were treated with uric acid and transfected with siRNA SLC2A12, followed by MK-2206 treatment to inhibit AKT expression. Cell proliferation was detected by CCK-8 assay. Apoptosis was detected by TUNEL assay. qRT-PCR and western blot assay were used to detect fibrogenic factors as well as activation of the AKT/FOXO3a pathway. The concentrations of inflammatory cytokines were measured by enzyme-linked immunosorbent assay. 
RESULTS AND CONCLUSION: (1) Uric acid treatment inhibited cell proliferation and promoted cell apoptosis in the HK2+uric acid group compared with the HK2 group. The proliferative ability of cells in the HK2+uric acid+siSLC2A12 group was further decreased and apoptotic cells were further increased compared with the HK2 group. Compared with the HK2+uric acid+siSLC2A12 group, the HK2+uric acid+siSLC2A12+MK-2206 group showed an increase in cell proliferation and a decrease in apoptotic cells. (2) Compared with the HK2 group, the connective tissue growth factor (CTGF), α-smooth muscle actin (α-SMA) and transforming growth factor beta (TGF-β) expressions increased in the HK2+uric acid group; CTGF, α-SMA and TGF-β expression further increased in the HK2+uric acid+siSLC2A12 group. Compared with the HK2+uric acid+siSLC2A12 group, the CTGF, α-SMA and TGF-β expressions decreased. (3) Compared with the HK2 group, the expression of p-AKT, FOXO3a, and p-FOXO3a elevated in the HK2+uric acid group; the expression of p-AKT further increased, while the expression of FOXO3a and p-FOXO3a decreased in the HK2+uric acid+siSLC2A12 group. Compared with the HK2+uric acid+siSLC2A12 group, p-AKT expression decreased; FOXO3a and p-FOXO3a expression increased in the HK2+uric acid+siSLC2A12+MK-2206 group. (4) Compared with the HK2 group, interleukin-6, interleukin-1 β, and tumor necrosis factor α levels increased in the HK2+uric acid group; interleukin-6, interleukin-1 β, and tumor necrosis factor α levels further increased in the HK2+uric acid+siSLC2A12 group. Compared with the HK2+uric acid+siSLC2A12 group, interleukin-6, interleukin-1 β, and tumor necrosis factor α levels diminished in the HK2+uric acid+siSLC2A12+MK-2206 group. (5) These findings indicate that SLC2A12 may protect against hyperuricemia-induced renal injury by counteracting uric acid-induced tubular fibrosis and inflammation through activation of the FOXO3a pathway.

Key words: ">hyperuricemia, SLC2A12, AKT, FOXO3a, signaling pathway, fibrosis

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