83-5595-64　HaCaT-ras A5 Cells 1vial　300494

特徴

• 概要：Unlock the secrets of tumour progression with HaCaT-ras A5 cells, a non-tumorigenic, spontaneously immortalized cell line derived from human skin keratinocytes.
• These cells are invaluable for investigating the intricate interplay between tumour cells and the surrounding microenvironment, shedding light on the mechanisms that drive cancer development and progression.
• Tumour cells can remarkably influence the gene expression of neighbouring stromal cells, such as fibroblasts, immune cells, and endothelial cells.
• The secretion of growth factors, cytokines, and proteases facilitates this communication.
• Among the key players in this tumour-stroma interaction is interleukin-6 (IL-6), a signalling molecule that becomes dysregulated in various tumour types through overexpression or persistent activation of the STAT3 transcription factor.
• In an enlightening study, researchers demonstrated that IL-6 stimulation increases proliferation, specifically in HaCaT-ras A5 benign tumour keratinocytes, leaving the fibroblast cell line MSU1.1 unaffected.
• This proliferation increase in HaCaT-ras A5 cells was found to correlate with the activation of the JAK/STAT signalling pathway.
• Remarkably, inhibiting STAT3 activation halted the proliferation of HaCaT-ras A5 cells and underscored the critical role of STAT3 activation in their growth.
• Conversely, fibroblasts exhibited more potent inhibition of the JAK/STAT signal pathway through the action of SOCS3 compared to HaCaT-ras A5 cells.
• This information was utilized to develop a mathematical model of the JAK/STAT pathway, enabling a comprehensive description of the dynamic behaviour of STAT3 and SOCS3 proteins.
• In addition to its direct effects on proliferation, IL-6 also exerts indirect influences.
• Upon IL-6 stimulation, a network of growth factors, including HGF, KGF, VEGF, and IL-8, becomes activated in both HaCaT-ras A5 cells and fibroblasts.
• Although the direct proliferation of fibroblasts remained unaltered by IL-6, the conditioned media from IL-6-stimulated HaCaT-ras A5 cells and MSU1.1 fibroblasts resulted in a significant increase in cell numbers for the opposite cell line.
• Extensive gene expression analyses involving over 16,000 analyzed genes in HaCaT-ras A5 cells and fibroblasts uncovered a subset of 19 genes upregulated in response to IL-6 stimulation in both cell types.
• Intriguingly, these upregulated genes were closely connected with the interferon signal pathway, providing valuable insights into the underlying cause of IL-6-induced growth inhibition in fibroblasts.
• Subsequent experiments involving siRNA knockdown of SerpinB4 confirmed its pivotal role in the proliferation of HaCaT-ras A5 cells.
• This groundbreaking research not only elucidates the intricate regulation of IL-6 in both tumour and stromal cells but also sheds light on the tumour-promoting effects of IL-6.
• The findings are a solid foundation for developing therapeutic strategies targeting IL-6 signalling pathways.
• HaCaT-ras A5 cells, derived from a 62-year-old male Caucasian, have proven to be an exceptional model for studying skin carcinoma progression in vivo.
• Through clonal selection, mutagenesis, and autocrine growth regulation mediated by granulocyte colony-stimulating factor and granulocyte-macrophage colony-stimulating factor, these cells develop slow-growing, highly differentiated cystic benign tumours when injected into Balb/c-nu/nu mice.
• Unlock the potential of HaCaT-ras A5 cells to deepen your understanding of tumour microenvironment interactions and propel your research towards novel therapeutic interventions.