Inpp5f,也称为inositol polyphosphate-5-phosphatase F,是一种重要的磷酸酶,属于inositol polyphosphate 5-phosphatase家族。该家族成员参与调节细胞内信号传导途径,影响细胞增殖、分化、凋亡和迁移等生物学过程。Inpp5f在多种组织中表达,包括大脑、肝脏和淋巴细胞等。Inpp5f的表达受到表观遗传调控,如DNA甲基化和组蛋白修饰等。
Inpp5f在多种疾病中发挥重要作用,包括慢性淋巴细胞白血病(CLL)、阿尔茨海默病(AD)、帕金森病(PD)和肝癌等。在CLL中,Inpp5f的表达水平与患者预后相关,是fludarabine-based therapy的一个独立预后标记[1]。在AD中,Inpp5f的基因变异与AD风险增加相关[3]。在PD中,Inpp5f的基因变异与PD风险和发病年龄相关[6,7]。在肝癌中,Inpp5f的表达水平与患者预后相关,是肝癌的一个潜在的治疗靶点[8]。
Inpp5f在神经系统中发挥重要作用。在脊髓损伤后,Inpp5f的表达水平降低,抑制了轴突再生和生长锥重构[2]。在PD中,Inpp5f的基因变异与突触内吞作用功能障碍相关,导致多巴胺神经元变性[6]。此外,Inpp5f在神经元发育中也发挥重要作用,其表达模式在脑组织中具有时间和空间特异性[4,5]。
Inpp5f的生物学功能与其与其他蛋白质的相互作用密切相关。Inpp5f可以与多种蛋白质相互作用,如ASPH、STAT3和exportin等,参与调节细胞信号传导途径和细胞内物质运输等生物学过程。Inpp5f与ASPH的相互作用促进了肝癌的生长[8]。Inpp5f与STAT3的相互作用抑制了胶质瘤的肿瘤发生[9]。Inpp5f与exportin的相互作用导致其在肝癌细胞中定位于细胞质[8]。
综上所述,Inpp5f是一种重要的磷酸酶,在多种生物学过程中发挥重要作用,包括细胞信号传导、细胞内物质运输和神经元发育等。Inpp5f在多种疾病中发挥重要作用,包括CLL、AD、PD和肝癌等。Inpp5f的研究有助于深入理解其生物学功能和疾病发生机制,为疾病的治疗和预防提供新的思路和策略。
参考文献:
1. Palermo, G, Maisel, D, Barrett, M, Dornan, D, Weisser, M. 2015. Gene expression of INPP5F as an independent prognostic marker in fludarabine-based therapy of chronic lymphocytic leukemia. In Blood cancer journal, 5, e353. doi:10.1038/bcj.2015.82. https://pubmed.ncbi.nlm.nih.gov/26430724/
2. Zou, Yixiao, Stagi, Massimiliano, Wang, Xingxing, Cafferty, William B J, Strittmatter, Stephen M. . Gene-Silencing Screen for Mammalian Axon Regeneration Identifies Inpp5f (Sac2) as an Endogenous Suppressor of Repair after Spinal Cord Injury. In The Journal of neuroscience : the official journal of the Society for Neuroscience, 35, 10429-39. doi:10.1523/JNEUROSCI.1718-15.2015. https://pubmed.ncbi.nlm.nih.gov/26203138/
3. Xue, Feng, Gao, Luyan, Chen, TingTing, Liu, Guiyou, Zhang, Yan. . Parkinson's Disease rs117896735 Variant Regulates INPP5F Expression in Brain Tissues and Increases Risk of Alzheimer's Disease. In Journal of Alzheimer's disease : JAD, 89, 67-77. doi:10.3233/JAD-220086. https://pubmed.ncbi.nlm.nih.gov/35848021/
4. Yan, Chen, Hongjuan, He, Yanjiang, Xing, Jing, Hou, Qiong, Wu. 2011. Expression patterns of imprinted gene Inpp5f-v3 during mouse brain development. In Journal of molecular histology, 42, 167-73. doi:10.1007/s10735-011-9321-y. https://pubmed.ncbi.nlm.nih.gov/21424340/
5. Choi, Jonathan D, Underkoffler, Lara A, Wood, Andrew J, Loomes, Kathleen M, Oakey, Rebecca J. . A novel variant of Inpp5f is imprinted in brain, and its expression is correlated with differential methylation of an internal CpG island. In Molecular and cellular biology, 25, 5514-22. doi:. https://pubmed.ncbi.nlm.nih.gov/15964807/
6. Ng, Xin Yi, Cao, Mian. 2024. Dysfunction of synaptic endocytic trafficking in Parkinson's disease. In Neural regeneration research, 19, 2649-2660. doi:10.4103/NRR.NRR-D-23-01624. https://pubmed.ncbi.nlm.nih.gov/38595283/
7. Blauwendraat, Cornelis, Heilbron, Karl, Vallerga, Costanza L, Nalls, Mike A, Singleton, Andrew B. 2019. Parkinson's disease age at onset genome-wide association study: Defining heritability, genetic loci, and α-synuclein mechanisms. In Movement disorders : official journal of the Movement Disorder Society, 34, 866-875. doi:10.1002/mds.27659. https://pubmed.ncbi.nlm.nih.gov/30957308/
8. Zhou, Qianlei, Lin, Jianhong, Yan, Yongcong, Zhou, Zhenyu, Xiao, Zhiyu. 2022. INPP5F translocates into cytoplasm and interacts with ASPH to promote tumor growth in hepatocellular carcinoma. In Journal of experimental & clinical cancer research : CR, 41, 13. doi:10.1186/s13046-021-02216-x. https://pubmed.ncbi.nlm.nih.gov/34996491/
9. Kim, Hong Sug, Li, Aiguo, Ahn, Susie, Song, Hua, Zhang, Wei. 2014. Inositol Polyphosphate-5-Phosphatase F (INPP5F) inhibits STAT3 activity and suppresses gliomas tumorigenicity. In Scientific reports, 4, 7330. doi:10.1038/srep07330. https://pubmed.ncbi.nlm.nih.gov/25476455/