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Cyclin-dependent kinase regulatory subunit 1 promotes cell proliferation by insulin regulation

机译:细胞周期蛋白依赖性激酶调节亚基1通过胰岛素调节促进细胞增殖

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摘要

Cyclin-dependent kinase regulatory subunit 1 (CKS1) helps regulate the cell cycle to increase cell number. However, the hormonal regulation on CKS1 expression is not well understood. We report that CKS1 is involved in the promotion of cell proliferation with insulin regulation in the lepidopteran insect Helicoverpa armigera. CKS1 is expressed in various tissues during the larval feeding stage. CKS1 knockdown results in larval death, body weight decrease, pupation time delay, and small-sized pupa formation. The underlying mechanism involves the blocking of cell proliferation and the repression of gene expression in the insulin pathway after CKS1 knockdown. CKS1 overexpression in the epidermal cell line results in cell proliferation. The N45 amino acid asparagine in the CKS domain is essential for the function of CKS in cell proliferation. CKS1 is upregulated by insulin via an insulin receptor, but is repressed by a high level of steroid hormone 20-hydroxyecdysone (20E). Results suggest that CKS1 promotes cell proliferation and body growth in coordination with the regulatory actions of insulin and steroid hormone 20E.
机译:细胞周期蛋白依赖性激酶调节亚基1(CKS1)有助于调节细胞周期以增加细胞数量。然而,对CKS1表达的激素调节尚不十分了解。我们报道CKS1参与了鳞翅目昆虫棉铃虫Helicoverpa armigera中的胰岛素调节促进细胞增殖。在幼虫饲养阶段,CKS1在各种组织中表达。 CKS1敲低导致幼虫死亡,体重下降,化脓时间延迟和小形成。潜在的机制涉及CKS1敲低后阻断细胞增殖和胰岛素途径中基因表达的抑制。在表皮细胞系中CKS1过表达导致细胞增殖。 CKS结构域中的N45位氨基酸天冬酰胺对于CKS在细胞增殖中的功能至关重要。 CKS1通过胰岛素受体被胰岛素上调,但被高水平的类固醇激素20-羟基蜕皮激素(20E)抑制。结果表明,CKS1与胰岛素和类固醇激素20E的调节作用协同作用,促进细胞增殖和机体生长。

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