Journal
SURGERY FOR OBESITY AND RELATED DISEASES
Volume 6, Issue 5, Pages 538-541Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.soard.2010.04.011
Keywords
Tumorigenesis; Obesity; Weight loss surgery; Growth hormones; Gastric bypass; Lapband; Cancer; Inflammation; Interleukin; Tumor necrosis lactor-alpha; Granulocyte-macrophage colony-stimulating factor; interferon-gamma; interleukin-1b.-2.-4.-5.-6.-8.-10; vascular endothelial growth factor; Hepatocyte growth factor; Tumor necrosis factor-receptor I; Tumor necrosis factor-receptor II.; Death receptor 5; Leptin; Adiponectin
Categories
Funding
- American Society for Metabolic and Bariatric Surgery
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Background: Obesity is associated with increased tumerogenesis Previously. we demonstrated that inflammation in obesity caused cancer fighting cells to display greater surface receptor levels. predisposing them to early cell death. We measured the inflammatory tumor growth factor levels to determine whether inflammation in obesity increases expression of these factors. potentially predisposing these patients to greater rates of neoplasia Methods: A total of 24 patients undergoing weight loss surgery had samples collected preoperatively and at 6 and 12 months after surgery The growth factors analyzed included tumor necrosis factor (TNF)-alpha, granulocyte-macrophage colony-stimulating factor, interferon-gamma. interleukin (IL)-1b. IL-2, IL-4. IL-5. IL-6. IL-8. IL-10. vascular endothelial growth factor. hepatocyte growth factor. TNF-receptor I (TNF-RI). TNF-RII. death receptor 5, leptin. and adiponectin Control samples were obtained from 10 healthy, normal weight volunteers Results: The tumor growth factors TNT-a, TNF-RI. TNF-RII, vascular endothelial growth factor. hepatocyte growth factor, interfeion-gamma, IL-2. IL-5, and IL-6 all decreased significantly (P < 05) compared with the preoperative values The IL-4, IL-8, leptin. death receptor 5. adiponectin, and granulocyte-macrophage colony-stimulating actor levels did not change signiflicantly over time The IL-1b and IL-10 levels were less than the detection.limit at all points When obese patient serum was compared with healthy volunteer pooled serum, we found that the Icon. death receptor 5. hepatocyte growth factor, vascular endothelial growth factor, TNF-RI. TNF-RII. TNF-alpha. IFN-gamma. granulocyte-macrophage colony-stimulating factor, IL-4, IL-5, IL-6. and IL-8 levels were all 2-37 times greater than the levels in the controls at baseline The concentrations of these same growth factors had decreased levels only 1-3 5 times greater than those of the controls at 12 months postoperatively Conclusion: Many inflammatory tumor growth factors are present in greater concentrations in obese individuals This could explain the greater prevalence of neoplasia in the morbidly obese population (Surg Obes Relat Dis 2010.6 538-541) (c) 2010 American Society for Metabolic and Bantam Surgery All rights reserved.
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