Wang W.,Central South University |
Wang W.,Disease Genome Research Center |
Wang W.,Jiangmen Central Hospital |
Li X.,Central South University |
And 22 more authors.
Molecular Medicine Reports | Year: 2015
The high risk of developing colorectal carcinoma (CRC), from ulcerative colitis (UC), is well known. Macrophages are widely distributed immune cells that have an indispensable role in UC, as well as in CRC. However, little is currently known about the dynamic changes that occur in macrophage and M1/M2 macrophage subpopulations, during UC-associated carcinogenesis. The aim of the present study was to investigate the alteration of colorectal macrophages and M1/M2 macrophage subpopulations during UC-associated carcinogenesis. Both expression level alterations and functional changes were determined during UC-associated carcinogenesis in an azoxymethane/dextran sodium sulfate-induced chemically colitis-associated carcinoma mouse model of Crj:CD-1 (ICR) mice. Notable evidence from immunohistochemistry, flow cytometry, cytokine detection, and gene expression analyses demonstrated that M2 macrophages have a critical role in CRC initiation, promotion, and metastasis. M2 macrophages are associated with unbalanced pro-inflammatory and anti-inflammatory axes and aberrant enhancement of migration/invasion-associated factors. Functional changes, similar to M2 polarized macrophages, were shown to occur in the M1 macrophages, without phenotypical changes, during the development of carcinoma and metastasis. The results of the present study suggest that M2 macrophages have a pro-tumor role during UC-associated carcinogenesis. Furthermore, similar functional changes occurred in the M1 macrophages, without polarization alterations, during carcinogenesis and metastasis.
Liao S.,Central South University |
Liao S.,Disease Genome Research Center |
Xiao S.,Central South University |
Zhu G.,Central South University |
And 11 more authors.
Oncology Reports | Year: 2014
Cervical cancer is the second most common cancer and the fifth most deadly malignancy in females worldwide, affecting 500,000 individuals each year. It is the leading cause of cancer mortality among women in developing countries. Dysregulated activation of genes, such as CD44, SOX9 and SKP2, plays a role in cervical cancer. CD38 is known to be involved in activities typical of cell surface receptors, such as signaling for activation and proliferation events and heterotypic cell adhesion. CD38 contributes to disease progression and relapse in certain tumors, such as acute myeloid and chronic lymphocytic leukemia. To the best of our knowledge, there is currently no report on the relationship between CD38 and cervical cancer. Using qPCR, immunohistochemistry, and western blot analysis, the expression levels of CD38 were investigated and found to be upregulated in cervical cancer. CD38 was correlated with dysregulation of the phosphatidylinositol 3-kinase (PI3K)/Akt signaling pathway in cervical cancer tissues in vitro. At the same time, CD38 overexpression affected the expression of PI3K, Akt, MDM2 and p53 in vivo. The results of the present study suggested that CD38 is highly expressed in cervical carcinoma tissues and play an important role in dysregulation of the PI3K/Akt signaling pathway.