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IFN-α-2b induces apoptosis by decreasing cellular cholesterol levels in rat preneoplastic hepatocytes
Cytokine ( IF 3.7 ) Pub Date : 2020-09-01 , DOI: 10.1016/j.cyto.2020.155172
Ariel D Quiroga 1 , Marina C Vera 2 , Anabela C Ferretti 3 , Alvaro Lucci 4 , Carla G Comanzo 2 , Flavia Lambertucci 2 , María P Ceballos 2 , María C Carrillo 4
Affiliation  

IFN-α administration to patients has been long discouraged and pushed back by new and apparently better drugs; however the adverse secondary effect, the high costs and the lack of specific action, make these new drugs hard to be used and put IFN-α again in the eye of the researchers. IFN-α-2b was demonstrated to induce apoptosis and modulation of lipid metabolism and the mechanisms are still unknown. Here, we sought to find the link between these features using a model of early stage cancer development. Using in vitro and in vivo approaches, we evaluated apoptosis and lipid metabolism. IFN-α-2b induced changes in hepatic cholesterol mass due to decreased synthesis and increased secretion. Interestingly, the drop in cellular cholesterol levels was necessary for IFN-α-2b to induce apoptosis. Results presented in this paper show the complexity of the action of IFN-α-2b on the early stages of liver cancer development. We show for the first time an interrelationship between cholesterol, apoptosis and IFN-α-2b. This makes clear the need for a reevaluation of IFN-α-2b action in order to develop softer, safer and more bearable derivatives. In this regard, knowing the molecular mechanisms by which IFN-α exerts its cellular actions is of crucial importance, and it is the main condition for therapy success for classical and new malignancies.

中文翻译:

IFN-α-2b 通过降低大鼠肿瘤前肝细胞中的细胞胆固醇水平诱导细胞凋亡

长期以来,向患者施用 IFN-α 一直受到劝阻,并被新的、明显更好的药物所抵制。然而不良的继发效应、高昂的成本和缺乏特异性作用,使得这些新药难以使用,使IFN-α再次进入研究人员的视野。IFN-α-2b 已被证明可诱导细胞凋亡和调节脂质代谢,但其机制尚不清楚。在这里,我们试图使用早期癌症发展模型找到这些特征之间的联系。使用体外和体内方法,我们评估了细胞凋亡和脂质代谢。由于合成减少和分泌增加,IFN-α-2b 诱导肝脏胆固醇量发生变化。有趣的是,细胞胆固醇水平的下降是 IFN-α-2b 诱导细胞凋亡所必需的。本文中的结果显示了 IFN-α-2b 对肝癌发展早期阶段作用的复杂性。我们首次展示了胆固醇、细胞凋亡和 IFN-α-2b 之间的相互关系。这清楚地表明需要重新评估 IFN-α-2b 的作用,以开发更柔软、更安全和更可承受的衍生物。在这方面,了解 IFN-α 发挥其细胞作用的分子机制至关重要,它是经典和新恶性肿瘤治疗成功的主要条件。
更新日期:2020-09-01
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