Ablim3,也称为Actin Binding LIM Protein 3,是一种重要的细胞骨架蛋白。LIM结构域蛋白在多种生物学过程中发挥着关键作用,包括胚胎发育、细胞谱系决定和癌症分化。Ablim3与Ablim1和Ablim2属于同一家族,具有四个LIM结构域和一个VHD结构域,这些结构域使其能够作为连接肌动蛋白细胞骨架和细胞信号通路的桥梁。Ablim3在脊椎动物中高度保守,其同源序列已在小鼠、鱼类和青蛙中被鉴定。此外,Ablim3在心脏、肺、肝脏和脑/小脑中表达较高,在胎儿肝脏、中枢神经系统(CNS)和脊髓中也存在表达[3]。这些研究表明,Ablim3在多种生理和病理过程中发挥着重要作用。
在神经母细胞瘤(NB)中,Ablim3的表达与疾病的转移和预后密切相关。研究发现,Ablim3的表达水平与NB的转移呈负相关,低表达Ablim3的患者预后较差[1]。进一步的研究表明,Ablim3通过调节细胞粘附分子(CAMs)通路影响NB的转移。Ablim3的下调导致ITGA3、ITGA8和KRT19等CAMs关键成分的表达下降,从而增加NB细胞的迁移和侵袭能力。此外,Ablim3的表达与APC共刺激和Type1 IFN反应相关,低表达Ablim3的患者对免疫治疗的反应增强[1]。
Ablim3还与自闭症谱系障碍(ASD)相关。DYRK1A基因的杂合性突变定义了一种ASD的综合征形式。Ablim3是DYRK1A的突触底物,DYRK1A在苔藓纤维-副神经节细胞(PV IN)突触中招募Ablim3以促进社交识别。在DYRK1A+/−小鼠的海马苔藓纤维中下调Ablim3足以恢复PV IN介导的CA3和CA2的抑制以及社交识别。这些发现表明,靶向DYRK1A突触和电路底物作为“DYRK1A功能的增强剂”具有逆转DYRK1A杂合子不足相关电路和认知障碍的潜力[2,4]。
除了在NB和ASD中的作用外,Ablim3还与其他疾病相关。研究发现,Ablim3的表达与食管腺癌(EAC)患者的总生存期(OS)相关。Ablim3与细胞增殖相关的生物过程或通路相关,可以作为EAC患者的潜在预后因素[5]。此外,Ablim3还与肝毒性相关,被鉴定为早期肝毒性基因生物标志物之一[6]。在HCV感染细胞中,下调Ablim3的表达可以降低HCV的复制和分泌,表明其在病毒复制周期中发挥着重要作用[7]。在肺腺癌(LUAD)中,Ablim3与其他基因共同构成了LD-M风险评分模型,与细胞周期密切相关,并可作为个性化治疗的预后指标[8]。
综上所述,Ablim3是一种重要的细胞骨架蛋白,在多种生理和病理过程中发挥着重要作用。Ablim3的表达与NB的转移和预后、ASD的社交识别、EAC的OS、肝毒性、HCV复制和LUAD的预后相关。这些发现为Ablim3作为治疗靶点提供了新的思路和策略,并为相关疾病的研究和治疗提供了重要参考。
参考文献:
1. Gong, Baocheng, Qu, Tongyuan, Zhang, Jiaojiao, Cao, Wenfeng, Zhao, Qiang. 2024. Downregulation of ABLIM3 confers to the metastasis of neuroblastoma via regulating the cell adhesion molecules pathway. In Computational and structural biotechnology journal, 23, 1547-1561. doi:10.1016/j.csbj.2024.04.024. https://pubmed.ncbi.nlm.nih.gov/38645433/
2. Shih, Yu-Tzu, Alipio, Jason Bondoc, Sahay, Amar. 2023. An inhibitory circuit-based enhancer of Dyrk1a function reverses Dyrk1a -associated impairment in social recognition. In bioRxiv : the preprint server for biology, , . doi:10.1101/2023.02.03.526955. https://pubmed.ncbi.nlm.nih.gov/36778241/
3. Krupp, Markus, Weinmann, Arndt, Galle, Peter R, Teufel, Andreas. . Actin binding LIM protein 3 (abLIM3). In International journal of molecular medicine, 17, 129-33. doi:. https://pubmed.ncbi.nlm.nih.gov/16328021/
4. Shih, Yu-Tzu, Alipio, Jason Bondoc, Sahay, Amar. . An inhibitory circuit-based enhancer of DYRK1A function reverses Dyrk1a-associated impairment in social recognition. In Neuron, 111, 3084-3101.e5. doi:10.1016/j.neuron.2023.09.009. https://pubmed.ncbi.nlm.nih.gov/37797581/
5. Mao, Yanmei, Zhang, Haibo, He, Xin, Chen, Yanping, Zeng, Ying. 2024. A four-gene signature predicts overall survival of patients with esophageal adenocarcinoma. In Translational cancer research, 13, 1382-1393. doi:10.21037/tcr-23-1798. https://pubmed.ncbi.nlm.nih.gov/38617513/
6. Smith, Brandi Patrice, Auvil, Loretta Sue, Welge, Michael, Johnson, Kamin, Madak-Erdogan, Zeynep. 2020. Identification of early liver toxicity gene biomarkers using comparative supervised machine learning. In Scientific reports, 10, 19128. doi:10.1038/s41598-020-76129-8. https://pubmed.ncbi.nlm.nih.gov/33154507/
7. Blackham, Samantha, Baillie, Andrew, Al-Hababi, Fadel, Hamatake, Robert, McGarvey, Michael J. 2010. Gene expression profiling indicates the roles of host oxidative stress, apoptosis, lipid metabolism, and intracellular transport genes in the replication of hepatitis C virus. In Journal of virology, 84, 5404-14. doi:10.1128/JVI.02529-09. https://pubmed.ncbi.nlm.nih.gov/20200238/
8. Cai, Ruijuan, Lin, Hongsheng, Cheng, Qianwen, Zhang, Chuchu, Tan, Ying. 2024. Construction of a novel lipid drop-mitochondria-associated genetic profile for predicting the survival and prognosis of lung adenocarcinoma. In Discover oncology, 15, 668. doi:10.1007/s12672-024-01526-8. https://pubmed.ncbi.nlm.nih.gov/39551861/