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USF1 Suppresses Expression of Fibrillar Type I, II, and III Collagen and pNP Adamts-3 in Osteosarcoma Cells
Molecular Biology ( IF 1.5 ) Pub Date : 2021-05-30 , DOI: 10.1134/s0026893321030031
M. Alper , T. Aydemir , F. Köçkar

Abstract

Collagens are the main components of human tissues. Various regulatory factors and cytokines may influence expression levels for collagen-encoding genes, and, therefore, contrubite to some collagen-associated pathologies. In this study, we demonstrate regulatory effects of USF1 on expression of genes encoding fibrillar collagen types I, II, and III in osteoblastic Saos-2 and MG-63 cells. An ectopic expression of the human USF1 led to a decrease in both mRNA and protein expression levels of the collagen-encoding genes mentioned above. ADAMTS-3 is a proteinase primarily responsible for the amino-terminal cleavage of type I and type II collagen precursors. The ADAMTS-3 promoter region contains potential binding sites for USF1. Here we show that an overexpression of USF1 lead to a decrease in ADAMTS-3 mRNA and protein expression levels. In co-transfection studies, USF1 negatively regulated ADAMTS-3 promoter activity. Further, in EMSA studies, we showed that USF1 binds to the ADAMTS-3 promoter region. In conclusion, it seems that ADAMTS-3 and USF1 contribute to the regulation of collagen encoding genes in osteosarcoma.



中文翻译:

USF1 抑制纤维状 I、II 和 III 型胶原蛋白和 pNP Adamts-3 在骨肉瘤细胞中的表达

摘要

胶原蛋白是人体组织的主要成分。各种调节因子和细胞因子可能会影响胶原蛋白编码基因的表达水平,因此会影响某些胶原蛋白相关的病理。在这项研究中,我们证明了 USF1 对成骨细胞 Saos-2 和 MG-63 细胞中编码纤维状胶原蛋白 I、II 和 III 型的基因表达的调节作用。人类 USF1 的异位表达导致上述胶原蛋白编码基因的 mRNA 和蛋白质表达水平降低。ADAMTS-3 是一种蛋白酶,主要负责 I 型和 II 型胶原前体的氨基末端裂解。该ADAMTS-3启动子区域包含 USF1 的潜在结合位点。在这里,我们表明 USF1 的过表达导致 ADAMTS-3 mRNA 和蛋白质表达水平的降低。在共转染研究中,USF1 负向调节ADAMTS-3启动子活性。此外,在 EMSA 研究中,我们表明 USF1 与 ADAMTS-3 启动子区域结合。总之,ADAMTS-3 和 USF1 似乎有助于调节骨肉瘤中的胶原蛋白编码基因。

更新日期:2021-05-30
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