Infiltrated M2 tumour-associated macrophages in the stroma promote metastasis and poor survival in oesophageal squamous cell carcinoma.

Infiltrated M2 tumour-associated macrophages in the stroma promote metastasis and poor survival in oesophageal squamous cell carcinoma. Histol Histopathol. 2018 Nov 12;:18061 Authors: Zhou J, Zheng S, Liu T, Liu Q, Chen Y, Ma R, Tan D, Lu X Abstract Although M2 tumour-associated macrophages (M2 TAMs) have been shown to be associated with the progression and metastasis of breast cancer, their role in oesophageal squamous cell carcinoma (ESCC) remains less well understood. Therefore, to understand the clinicopathological significance of infiltrated M2 TAMs in ESCC, statistical analysis was performed after immunohistochemical evaluation of CD163 expression, a well-accepted surface marker of M2 TAMs in ESCC. To gain insight into the effect of M2 TAMs, ESCC cell lines Eca109 and KYSE150 cells were co-cultured with M2 TAMs artificially induced from THP-1 cells. The variations in the proliferation, migration and invasion were assessed using the MTT, wound-healing and Transwell assays, respectively. The variation in the typical biomarkers of the epithelial-mesenchymal transition (EMT) was evaluated using western blotting. Infiltrated M2 TAMs were confirmed to predominate in the stroma of ESCC relative to normal controls. Moreover, it turned out that M2 TAMs were shown to promote the migration and invasion of ESCC cells but not proliferation. Furthermore, M2 TAMs were observed to induce EMT in ESCC cells. Together, our results showed that inf...
Source: Histology and Histopathology - Category: Cytology Tags: Histol Histopathol Source Type: research