Elevation of circulating interleukin-8 is related to lymph node and distant metastases in esophageal squamous cell carcinomas--implication for clinical evaluation of cancer patient

Cytokine
Malgorzata Krzystek-KorpackaT Banas

Abstract

The presence of lymph node metastasis (LNM) is an important factor in clinical evaluation of esophageal cancer patients. Biological markers able to support detection of metastatic lymph nodes are sought after. Interleukin-8 (IL-8) is overexpressed by many cancers and involved in cancer dissemination. We investigated the relationship between circulating IL-8 and clinicopathological features of esophageal squamous cell carcinoma (ESCC), and evaluated the diagnostic potential of IL-8, with reference to the key angiogenic and lymphangiogenic factors: vascular endothelial growth factors A and C (VEGF-A and VEGF-C). We found elevated IL-8 levels in ESCC patients, correlated with tumor size and cancer dissemination, especially LNM. Circulating IL-8 correlated with lymphangiogenic VEGF-C rather then angiogenic VEGF-A. The association weakened in metastatic cancers, suggesting divergent mechanism of IL-8 involvement in the dissemination process. The cytokine levels correlated with platelets and neutrophils, pointing at these cells as possible sources of circulating IL-8. We demonstrated IL-8 that positively correlated with inflammation status of ESCC patients. Circulating IL-8 was a better indicator of ESCC dissemination than VEGF-A or ...Continue Reading

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