| Autor: |
Kim YJ; Prestige Biopharma IDC, Busan 46726, Republic of Korea.; Department of Biomedical Sciences, Dong-A University, Busan 49315, Republic of Korea., Nanda SS; Prestige Biopharma IDC, Busan 46726, Republic of Korea., Jiang F; Prestige Biopharma IDC, Busan 46726, Republic of Korea., Pyo SY; Prestige Biopharma IDC, Busan 46726, Republic of Korea., Han JY; Department of Laboratory Medicine, College of Medicine, Dong-A University, Busan 49201, Republic of Korea., Koh SS; Prestige Biopharma IDC, Busan 46726, Republic of Korea., Kang TH; Prestige Biopharma IDC, Busan 46726, Republic of Korea. |
| Abstrakt: |
Tumor-associated macrophages (TAMs) in the tumor microenvironment (TME) promote immune evasion, cancer cell proliferation, and metastasis. Ongoing research is focused on finding ways to prevent tumor growth by inhibiting TAM polarization, which has shown a correlation with unfavorable prognosis in clinical studies. Pancreatic adenocarcinoma up-regulated factor (PAUF) is a protein secreted from pancreatic cancer (PC) and acts as a TME modulator that affects the TME by acting on not only cancer cells but also stromal cells and immune cells. Tumor cells can evade the immune system by PAUF binding to Toll-like receptor (TLR) in monocytes, as this research shows. In this study, the examination centered around the recruitment of human monocytes by PAUF and the subsequent differentiation into macrophages. In an in vitro chemotaxis assay, PAUF induced chemotactic migration of TLR2-mediated monocytes. In addition, PAUF induced differentiation of monocytes into M2 macrophages, which was verified based on expressing surface markers and cytokines and morphological analysis. The inhibition of T cell proliferation and function was observed in differentiated M2 macrophages. To conclude, these findings indicate that PAUF functions as a promoter of cancer progression by regulating the recruitment and differentiation of macrophages within TMEs, ultimately causing immunosuppression. |
