RESUMO
Background: Colorectal cancer [CRC] is one of the most common causes of cancer-related death in the world. The expression of N-myc downstream-regulated gene 2 [NDRG2] is down-regulated in CRC. The aim of this study was to investigate the effect of NDRG2 overexpression on cell proliferation and invasive potential of SW48 cells
Methods: SW48 cells were transfected with a plasmid overexpressing NDRG2. After stable transfection, the effect of NDRG2 overexpression on cell proliferation was evaluated by MTT assay. The effects of NDRG2 overexpression on cell migration, invasion and cell motility and matrix metalloproteinase 9 [MMP9] activities were also investigated using matrigel transwell assay, wound healing assay and gelatin zymography, respectively
Results: MTT assay showed that overexpression of NDRG2 caused attenuation of SW48 cell proliferation. Transwell and wound healing assay revealed that NDRG2 overexpression led to inhibition of migration, invasion, and motility of SW48 cells. The overexpression of NDRG2 also reduced the activity of secreted MMP-9
Conclusions: The results of this study suggest that NDRG2 overexpression inhibits proliferation and invasive potential of SW48 cells, which likely occurs via suppression of MMP-9 activity
RESUMO
Regulatory T cells [T-regs] have an important role in cancer by suppression of protective antitumor immune responses. Regulatory T cells express the forkhead/ winged helix transcription factor [FOXP3] and OX40 molecules which have important regulatory roles in the immune system. To evaluate FOXP3 and OX40 transcripts in the peripheral blood mononuclear cells of women with breast cancer. Blood samples from 40 women with histologically-confirmed infiltrating ductal carcinoma of the breast and 40 healthy volunteer women without a history of malignancy or autoimmune disorders were collected. The abundance of FOXP3 and OX40 gene transcripts were determined by quantitative real-time PCR [qRT-PCR]. There was a significant positive correlation between FOXP3 and OX40 gene expression in women with breast cancer in a stage dependent manner. This finding emphasizes the importance of T-regs as predominant targets for breast cancer immunotherapy