USF1 Suppresses Expression of Fibrillar Type I, II, and III Collagen and pNP Adamts-3 in Osteosarcoma Cells

Alper M., Aydemir T., Kockar F.

MOLECULAR BIOLOGY, vol.55, no.4, pp.580-588, 2021 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 55 Issue: 4
  • Publication Date: 2021
  • Doi Number: 10.1134/s0026893321030031
  • Journal Name: MOLECULAR BIOLOGY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, BIOSIS, CAB Abstracts, Chemical Abstracts Core, EMBASE, Veterinary Science Database
  • Page Numbers: pp.580-588
  • Keywords: ADAMTS-3, collagen, USF1, osteosarcoma, transcriptional regulation, GENE-EXPRESSION, E-BOX, BINDING, TRANSCRIPTION, PROLIFERATION, ACTIVATION, PHENOTYPE, INVASION, ENHANCER, SAOS-2
  • Dokuz Eylül University Affiliated: No

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.