吉林大学学报(医学版) ›› 2025, Vol. 51 ›› Issue (6): 1445-1451.doi: 10.13481/j.1671-587X.20250601

• 基础研究 •    下一篇

敲低KIF3B基因通过抑制Shh信号通路对小鼠胚胎腭突间充质细胞自噬的促进作用

刘中正1,廉舒博1,冯文宣2,温欣,刘瀚予,何苇1()   

  1. 1.遵义医科大学附属口腔医院口腔颌面外科,贵州 遵义 563000
    2.河南省南阳市口腔医院口腔 颌面外科一病区,河南 南阳 473000
  • 收稿日期:2023-12-15 接受日期:2025-03-16 出版日期:2025-11-28 发布日期:2025-12-15
  • 通讯作者: 何苇 E-mail:heweichenhui@163.com
  • 作者简介:刘中正(1995-),男,新疆维吾尔自治区乌鲁木齐市人,主治医师,医学硕士,主要从事错颌畸形方面和口腔颌面部畸形方面的研究。
  • 基金资助:
    国家自然科学基金地区科学基金项目(82160176);贵州省科技厅科技计划项目(黔科合基础-ZL〔2023〕一般583);遵义医科大学省级大学生创新创业项目(ZYDC2022064)

Prometive effect of knockdown of KIF3B gene on autophagy in mouse embryonic palatal mesenchymal cells by inhibiting Shh signaling pathway

Zhongzheng LIU1,Shubo LIAN1,Wenxuan FENG2,Xin WEN,Hanyu LIU,Wei HE1()   

  1. 1.Department of Oral and Maxillofacial Surgery,Affiliated Stomatology Hospital,Zunyi Medical University,Zunyi 563000,China
    2.Ward One,Department of Oral and Maxillofacial Surgery,Stomatology Hospital,Nanyang City,Henan Province,Nanyang 473000,China
  • Received:2023-12-15 Accepted:2025-03-16 Online:2025-11-28 Published:2025-12-15
  • Contact: Wei HE E-mail:heweichenhui@163.com

摘要:

目的 探讨敲低小鼠胚胎腭突间充质细胞(mEPMCs)初级纤毛(PC)重要组件驱动蛋白家族成员3B(KIF3B)基因对细胞自噬水平的作用,并阐明其作用机制。 方法 收集体外培养孕龄14.5 d C57BL/6J小鼠的mEPMCs,根据是否敲低KIF3B基因和使用平滑因子受体激动剂(SAG)激活音猬因子(Shh)信号通路及其下游共受体Smo,分为对照组(给予生理盐水)、空载病毒转染细胞组(sh-NC组)(给予慢病毒转染)、敲低KIF3B组(sh-KIF3B组)(给予KIF3B基因敲低)、敲低KIF3B加入SAG组(sh-KIF3B+SAG组)(给予KIF3B基因敲低后加入SAG),每组5只大鼠。透射电镜观察各组mEPMCs中自噬小体/自噬溶酶体形态表现及数量,Western blotting法检测各组mEPMCs中自噬相关蛋白苄氯素1(Beclin-1)和p62及Shh信号通路中Shh和Smo蛋白表达水平。 结果 透射电镜观察,与对照组比较,sh-KIF3B组mEPMCs中自噬小体/自噬溶酶体数量明显增加(P<0.05);与sh-KIF3B组比较,sh-KIF3B+SAG组mEPMCs中自噬小体/自噬溶酶体数量明显减少(P<0.05)。Western blotting法检测,与对照组比较,sh-KIF3B组mEPMCs中Beclin-1蛋白表达水平明显升高 (P<0.05),KIF3B、p62、Shh和Smo蛋白表达水平均明显降低(P<0.01);与sh-KIF3B组比较,sh-KIF3B+SAG组mEPMCs中Shh、Smo和p62蛋白表达水平明显升高(P<0.01),Beclin-1蛋白表达水平明显降低(P<0.01)。 结论 敲低KIF3B基因可促进mEPMCs自噬,其机制可能与其抑制Shh信号通路有关。

关键词: 唇腭裂, 驱幼蛋白家族成员3B, 初级纤毛, 音猬因子信号通路, 细胞自噬

Abstract:

Objective To discuss the effect of knock down of gene of kinesin family member 3B (KIF3B), an important component of primary cilia (PC) of in mouse embryonic palatal mesenchymal on the autophagy level of cells (mEPMCs) cells, and to clarify its mechanism. Methods The mEPMCs from gestational day 14.5 C57BL/6J mice cultured in vitro were collected and divided into control group (administered normal saline), empty lentivirus transfected cell group (sh-NC group) (administered lentivirus transfection), KIF3B knockdown group (sh-KIF3B group) (administered KIF3B gene knockdown), and KIF3B knockdown plus Smoothened receptor agonist (SAG) group (sh-KIF3B+SAG group) (administered KIF3B gene knockdown followed by SAG addition), based on whether the KIF3B gene was knocked down and whether the SAG was used to activate the sonic hedgehog (Shh) signaling pathway and its downstream coreceptor Smo, with 5 rats in each group. Transmission electron microscope was used to observe the morphology and the number of autophagosomes/autolysosomes in the mEPMCs in various groups; Western blotting method was used to detect the expression levels of autophagy-related proteins Beclin-1 and p62, and the Shh signaling pathway proteins Shh and Smo in the mEPMCs in various groups. Results The transmission electron microscope observation results showed that compared with control group, the number of autophagosomes/autolysosomes in sh-KIF3B group was significantly increased (P<0.05); compared with sh-KIF3B group, the number of autophagosomes/autolysosomes in the mEPMCs in sh-KIF3B+SAG group was significantly decreased (P<0.05). The Western blotting results showed that compared with control group, the Beclin-1 protein expression level in the mEPMCs in sh-KIF3B group was significantly increased (P<0.05), and the KIF3B, p62, Shh, and Smo protein expression levels were significantly decreased (P<0.01); compared with sh-KIF3B group, the Shh, Smo, and p62 protein expression levels in the mEPMCs in sh-KIF3B+SAG group were significantly increased (P<0.01), and the Beclin-1 protein expression level was significantly decreased (P<0.01). Conclusion Knockdown of KIF3B gene can promote autophagy of the mEPMCs, and the mechanism may be related to its inhibition of the Shh signaling pathway.

Key words: Cleft lip and palate, Kinesin family member 3B, Primary cilia, Sonic hedgehog signaling pathway, Autophagy

中图分类号: 

  • R782.2