Jinzhi Li1, Xiaoyue Xu2, Yanyan Jiang3, Nicole G Hansbro4,5,6, Philip M Hansbro4,5,6, Jincheng Xu7,8, Gang Liu9,10. 1. School of Nursing, Bengbu Medical College, Bengbu, Anhui, China. 2. Faculty of Health, University of Technology Sydney, Ultimo, New South Wales, Australia. 3. School of Anatomy, Bengbu Medical College, Bengbu, Anhui, China. 4. School of Life Sciences, Faculty of Science, University of Technology Sydney, Ultimo, New South Wales, Australia. 5. Centre for Inflammation, Centenary Institute, Camperdown, New South Wales, Australia. 6. Priority Research Centre for Health Lungs, Hunter Medical Research Institute, The University of Newcastle, New Lambton Heights, New South Wales, Australia. 7. Stomatology Department, The First Affiliated Hospital of Bengbu Medical College, Bengbu, Anhui, China. xjch9999@163.com. 8. School of Dental Medicine, Bengbu Medical College, Bengbu, Anhui, China. xjch9999@163.com. 9. School of Life Sciences, Faculty of Science, University of Technology Sydney, Ultimo, New South Wales, Australia. Gang.Liu@uts.edu.au. 10. Centre for Inflammation, Centenary Institute, Camperdown, New South Wales, Australia. Gang.Liu@uts.edu.au.
Abstract
BACKGROUND: Colorectal cancer (CRC) is the most common cancer and a leading cause of death worldwide. Extracellular matrix (ECM) proteins regulate tumor growth and development in CRC. Elastin (ELN) is a component of ECM proteins involved in the tumor microenvironment. However, the role of ELN in CRC remains unclear. METHODS: In this study, we analyzed ELN gene expression in tumors from CRC patients and adjacent non-tumor colon tissues and healthy controls from two existing microarray datasets. ELN protein was measured in human normal colon cells and colon cancer epithelial cells and tumor development was assessed in colon epithelial cells cultured in medium with or without ELN peptide on plates coated with ELN recombinant protein. Control plates were coated with PBS only. RESULTS: We found ELN gene expression was increased in tumors from CRC patients compared to adjacent non-tumor tissues and healthy controls. ELN protein was increased in cancer cells compared to normal colon epithelial cells. Transforming growth factor beta (TGF-β) was a key cytokine to induce production of ECM proteins, but it did not induce ELN expression in colon cancer cells. Matrix metalloproteinase 9 (MMP9) gene expression was increased, but that of MMP12 (elastase) did not change between CRC patients and control. Tissue inhibitor of metalloproteinases 3 (TIMP3) gene expression was decreased in colon tissues from CRC patients compared to healthy controls. However, MMP9, MMP12 and TIMP3 proteins were increased in colon cancer cells. ELN recombinant protein increased proliferation and wound healing in colon cancer epithelial cells. This had further increased in cancer cells incubated in plates coated with recombinant ELN coated plate and in culture media containing ELN peptide. A potential mechanism was that ELN induced epithelial mesenchymal transition with increased alpha-smooth muscle actin and vimentin proteins but decreased E-cadherin protein. Tumor necrosis factor alpha (TNF) mRNA was also increased in CRC patients compared to controls. ELN recombinant protein induced further increases in TNF protein in mouse bone marrow derived macrophages after lipopolysaccharide stimulation. CONCLUSIONS: These data suggest ELN regulates tumor development and the microenvironment in CRC.
BACKGROUND:Colorectal cancer (CRC) is the most common cancer and a leading cause of death worldwide. Extracellular matrix (ECM) proteins regulate tumor growth and development in CRC. Elastin (ELN) is a component of ECM proteins involved in the tumor microenvironment. However, the role of ELN in CRC remains unclear. METHODS: In this study, we analyzed ELN gene expression in tumors from CRCpatients and adjacent non-tumor colon tissues and healthy controls from two existing microarray datasets. ELN protein was measured in human normal colon cells and colon cancer epithelial cells and tumor development was assessed in colon epithelial cells cultured in medium with or without ELN peptide on plates coated with ELN recombinant protein. Control plates were coated with PBS only. RESULTS: We found ELN gene expression was increased in tumors from CRCpatients compared to adjacent non-tumor tissues and healthy controls. ELN protein was increased in cancer cells compared to normal colon epithelial cells. Transforming growth factor beta (TGF-β) was a key cytokine to induce production of ECM proteins, but it did not induce ELN expression in colon cancer cells. Matrix metalloproteinase 9 (MMP9) gene expression was increased, but that of MMP12 (elastase) did not change between CRCpatients and control. Tissue inhibitor of metalloproteinases 3 (TIMP3) gene expression was decreased in colon tissues from CRCpatients compared to healthy controls. However, MMP9, MMP12 and TIMP3 proteins were increased in colon cancer cells. ELN recombinant protein increased proliferation and wound healing in colon cancer epithelial cells. This had further increased in cancer cells incubated in plates coated with recombinant ELN coated plate and in culture media containing ELN peptide. A potential mechanism was that ELN induced epithelial mesenchymal transition with increased alpha-smooth muscle actin and vimentin proteins but decreased E-cadherin protein. Tumor necrosis factor alpha (TNF) mRNA was also increased in CRCpatients compared to controls. ELN recombinant protein induced further increases in TNF protein in mouse bone marrow derived macrophages after lipopolysaccharide stimulation. CONCLUSIONS: These data suggest ELN regulates tumor development and the microenvironment in CRC.
Entities:
Keywords:
Colorectal cancer; Elastin, epithelial-mesenchymal transition; Extracellular matrix protein
Authors: Yao Wang; Xiaoyue Xu; Jacqueline E Marshall; Muxue Gong; Yang Zhao; Kamal Dua; Philip M Hansbro; Jincheng Xu; Gang Liu Journal: Front Oncol Date: 2021-12-13 Impact factor: 6.244
Authors: Aleksandra V Sen'kova; Innokenty A Savin; Evgenyi V Brenner; Marina A Zenkova; Andrey V Markov Journal: PLoS One Date: 2021-11-22 Impact factor: 3.240