| Autor: |
de Matos-Neto EM; Cancer Metabolism Research Group, Faculdade de Medicina, Universidade de São Paulo , São Paulo, São Paulo , Brazil., Lima JD; Cancer Metabolism Research Group, Faculdade de Medicina, Universidade de São Paulo , São Paulo, São Paulo , Brazil., de Pereira WO; Israelite Albert Einstein Institute, Israelite Albert Einstein Hospital , São Paulo, São Paulo , Brazil., Figuerêdo RG; Cancer Metabolism Research Group, Faculdade de Medicina, Universidade de São Paulo , São Paulo, São Paulo , Brazil., Riccardi DM; Cancer Metabolism Research Group, Faculdade de Medicina, Universidade de São Paulo , São Paulo, São Paulo , Brazil., Radloff K; Cancer Metabolism Research Group, Faculdade de Medicina, Universidade de São Paulo , São Paulo, São Paulo , Brazil., das Neves RX; Cancer Metabolism Research Group, Faculdade de Medicina, Universidade de São Paulo , São Paulo, São Paulo , Brazil., Camargo RG; Cancer Metabolism Research Group, Faculdade de Medicina, Universidade de São Paulo , São Paulo, São Paulo , Brazil., Maximiano LF; Department of Clinical Surgery, Universidade de São Paulo , São Paulo, São Paulo , Brazil., Tokeshi F; Department of Clinical Surgery, Universidade de São Paulo , São Paulo, São Paulo , Brazil., Otoch JP; Department of Clinical Surgery, Universidade de São Paulo , São Paulo, São Paulo , Brazil., Goldszmid R; Center for Cancer Research, NIH , Bethesda, MD , USA., Câmara NO; Department of Immunology, Universidade de São Paulo , São Paulo, São Paulo , Brazil., Trinchieri G; Center for Cancer Research, NIH , Bethesda, MD , USA., de Alcântara PS; Department of Clinical Surgery, Universidade de São Paulo , São Paulo, São Paulo , Brazil., Seelaender M; Cancer Metabolism Research Group, Faculdade de Medicina, Universidade de São Paulo , São Paulo, São Paulo , Brazil. |
| Abstrakt: |
Cachexia affects about 80% of gastrointestinal cancer patients. This multifactorial syndrome resulting in involuntary and continuous weight loss is accompanied by systemic inflammation and immune cell infiltration in various tissues. Understanding the interactions among tumor, immune cells, and peripheral tissues could help attenuating systemic inflammation. Therefore, we investigated inflammation in the subcutaneous adipose tissue and in the tumor, in weight stable and cachectic cancer patients with same diagnosis, in order to establish correlations between tumor microenvironment and secretory pattern with adipose tissue and systemic inflammation. Infiltrating monocyte phenotypes of subcutaneous and tumor vascular-stromal fraction were identified by flow cytometry. Gene and protein expression of inflammatory and chemotactic factors was measured with qRT-PCR and Multiplex Magpix(®) system, respectively. Subcutaneous vascular-stromal fraction exhibited no differences in regard to macrophage subtypes, while in the tumor, the percentage of M2 macrophages was decreased in the cachectic patients, in comparison to weight-stable counterparts. CCL3, CCL4, and IL-1β expression was higher in the adipose tissue and tumor tissue in the cachectic group. In both tissues, chemotactic factors were positively correlated with IL-1β. Furthermore, positive correlations were found for the content of chemoattractants and cytokines in the tumor and adipose tissue. The results strongly suggest that the crosstalk between the tumor and peripheral tissues is more pronounced in cachectic patients, compared to weight-stable patients with the same tumor diagnosis. |
