Asian Pacific Journal of Cancer Prevention

Asian Pacific Journal of Cancer Prevention (아시아태평양암예방학회)
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Obesity and Obese-related Chronic Low-grade Inflammation in Promotion of Colorectal Cancer Development

  • Pietrzyk, Lukasz (Laboratory of Biostructure, Department of Human Anatomy, Medical University of Lublin, Military Clinical Hospital) ;
  • Torres, Anna (Laboratory of Biostructure, Department of Human Anatomy, Medical University of Lublin, Military Clinical Hospital) ;
  • Maciejewski, Ryszard (Laboratory of Biostructure, Department of Human Anatomy, Medical University of Lublin, Military Clinical Hospital) ;
  • Torres, Kamil (Laboratory of Biostructure, Department of Human Anatomy, Medical University of Lublin, Military Clinical Hospital)
  • Published : 2015.06.03
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Abstract

Colorectal cancer (CRC) is a worldwide health problem, being the third most commonly detected cancer in males and the second in females. Rising CRC incidence trends are mainly regarded as a part of the rapid 'Westernization' of life-style and are associated with calorically excessive high-fat/low-fibre diet, consumption of refined products, lack of physical activity, and obesity. Most recent epidemiological and clinical investigations have consistently evidenced a significant relationship between obesity-driven inflammation in particular steps of colorectal cancer development, including initiation, promotion, progression, and metastasis. Inflammation in obesity occurs by several mechanisms. Roles of imbalanced metabolism (MetS), distinct immune cells, cytokines, and other immune mediators have been suggested in the inflammatory processes. Critical mechanisms are accounted to proinflammatory cytokines (e.g. IL-1, IL-6, IL-8) and tumor necrosis factor-${\alpha}$ (TNF-${\alpha}$). These molecules are secreted by macrophages and are considered as major agents in the transition between acute and chronic inflammation and inflammation-related CRC. The second factor promoting the CRC development in obese individuals is altered adipokine concentrations (leptin and adiponectin). The role of leptin and adiponectin in cancer cell proliferation, invasion, and metastasis is attributable to the activation of several signal transduction pathways (JAK/STAT, mitogen-activated protein kinase (MAPK), phosphatidylinositol 3 kinase (PI3K), mTOR, and 5'AMPK signaling pathways) and multiple dysregulation (COX-2 downregulation, mRNA expression).

Keywords

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