BREAST CANCER RISK AFTER BARIATRIC SURGERY AND INFLUENCE OF INSULIN LEVELS: A RETROSPECTIVE STUDY
Main Article Content
Keywords
Breast cancer risk, bariatric surgery, obesity, insulin levels, insulin sensitivity, estrogen, hyperinsulinemia, metabolic changes, inflammation, weight loss, cancer prevention
Abstract
Breast cancer still poses a major threat despite the numerous and commendable research on it and the development of means for its treatment yet it kills many women with obesity and it is a well-known fact that obesity increases cancer risks by causing high levels of estrogen, insulin and chronic inflammation. Bariatric surgery has been used for its ability to facilitate weight loss and for producing beneficial effects on the metabolic parameter such as insulin sensitivity. This present case control study would therefore seek to establish the link between bariatric surgery, change in the levels of insulin and reduction in breast cancer incidence. This study included 1000 post-surgical women with obesity surgery with follow-ups conducted after five years of the surgery. Overall of the points that were discovered as its estimates a clear and highly noteworthy decrease for the incidence of breast cancer, as well as it reviewed a very distinctive decrease in their pathological pre-condition, that is poor insulin sensitivity. The lower incidence of breast cancer in patients with >50% reduction in insulin levels was discovered to be 0.7% compared to 2.8% in those with persistent hyperinsulinemia. These observations indicate that enhanced metabolic status including insulin sensitivity might be necessary for the prevention of breast cancer after bariatric surgery pointing to the need for metabolic supervision of patients after the surgery.
References
2. Bhaskaran, K., et al. "Body-Mass Index and Risk of 22 Specific Cancers: A Population-Based Cohort Study of 5·24 Million UK Adults." The Lancet, vol. 384, no. 9945, 2014, pp. 755-765.
3. Lauby-Secretan, B., et al. "Body Fatness and Cancer—Viewpoint of the IARC Working Group." New England Journal of Medicine, vol. 375, no. 8, 2016, pp. 794-798.
4. Iyengar, N. M., et al. "Obesity and Cancer Mechanisms: Tumor Microenvironment and Inflammation." Journal of Clinical Oncology, vol. 34, no. 35, 2016, pp. 4270-4276.
5. Pierobon, M., & Frankenfeld, C. L. "Obesity as a Risk Factor for Triple-Negative Breast Cancers: A Systematic Review and Meta-Analysis." Breast Cancer Research and Treatment, vol. 137, no. 2, 2013, pp. 307-314.
6. Gallagher, E. J., & LeRoith, D. "Diabetes, Obesity, and Cancer: The Mechanisms Underlying Increased Risk." Hormone Molecular Biology and Clinical Investigation, vol. 5, no. 2, 2011, pp. 11-17.
7. Schauer, P. R., et al. "Bariatric Surgery versus Intensive Medical Therapy for Diabetes — 3-Year Outcomes." New England Journal of Medicine, vol. 370, no. 21, 2014, pp. 2002-2013.
8. Sjöström, L., et al. "Effects of Bariatric Surgery on Mortality in Swedish Obese Subjects." New England Journal of Medicine, vol. 367, no. 8, 2012, pp. 740-748.
9. Adams, T. D., et al. "Cancer Incidence and Mortality After Gastric Bypass Surgery." Obesity, vol. 20, no. 3, 2012, pp. 439-445.
10. Anvari, M., et al. "The Impact of Bariatric Surgery on Cancer Risk in Morbidly Obese Adults: The Hamilton Cohort Study." Surgical Endoscopy, vol. 31, no. 11, 2017, pp. 4432-4439.
11. Christou, N. V., et al. "Surgical Options in the Treatment of Morbid Obesity: Bariatric Surgery." Surgical Clinics of North America, vol. 88, no. 6, 2008, pp. 1283-1309.
12. Renehan, A. G., et al. "Insulin Resistance and Cancer." British Journal of Cancer, vol. 100, no. 7, 2009, pp. 886-889.
13. Goodwin, P. J., et al. "Insulin Levels and Breast Cancer Outcome." Journal of Clinical Oncology, vol. 20, no. 1, 2002, pp. 42-51.
14. Adams, T. D., et al. "Cancer Incidence and Mortality After Gastric Bypass Surgery." Obesity, vol. 20, no. 3, 2012, pp. 439-445.
15. Anvari, M., et al. "The Impact of Bariatric Surgery on Cancer Risk in Morbidly Obese Adults: The Hamilton Cohort Study." Surgical Endoscopy, vol. 31, no. 11, 2017, pp. 4432-4439.
16. Bhaskaran, K., et al. "Body-Mass Index and Risk of 22 Specific Cancers: A Population-Based Cohort Study of 5·24 Million UK Adults." The Lancet, vol. 384, no. 9945, 2014, pp. 755-765.
17. Calle, E. E., et al. "Overweight, Obesity, and Mortality from Cancer in a Prospectively Studied Cohort of U.S. Adults." New England Journal of Medicine, vol. 348, no. 17, 2003, pp. 1625-1638.
18. Christou, N. V., et al. "Surgical Options in the Treatment of Morbid Obesity: Bariatric Surgery." Surgical Clinics of North America, vol. 88, no. 6, 2008, pp. 1283-1309.
19. Gallagher, E. J., & LeRoith, D. "Diabetes, Obesity, and Cancer: The Mechanisms Underlying Increased Risk." Hormone Molecular Biology and Clinical Investigation, vol. 5, no. 2, 2011, pp. 11-17.
20. Goodwin, P. J., et al. "Insulin Levels and Breast Cancer Outcome." Journal of Clinical Oncology, vol. 20, no. 1, 2002, pp. 42-51.
21. Iyengar, N. M., et al. "Obesity and Cancer Mechanisms: Tumor Microenvironment and Inflammation." Journal of Clinical Oncology, vol. 34, no. 35, 2016, pp. 4270-4276.
22. Lauby-Secretan, B., et al. "Body Fatness and Cancer—Viewpoint of the IARC Working Group." New England Journal of Medicine, vol. 375, no. 8, 2016, pp. 794-798.
23. Renehan, A. G., et al. "Insulin Resistance and Cancer." British Journal of Cancer, vol. 100, no. 7, 2009, pp. 886-889.
24. Schauer, P. R., et al. "Bariatric Surgery versus Intensive Medical Therapy for Diabetes — 3-Year Outcomes." New England Journal of Medicine, vol. 370, no. 21, 2014, pp. 2002-2013.
25. Sjöström, L., et al. "Effects of Bariatric Surgery on Mortality in Swedish Obese Subjects." New England Journal of Medicine, vol. 367, no. 8, 2012, pp. 740-748.
26. Adams, T. D., et al. "Cancer Incidence and Mortality After Gastric Bypass Surgery." Obesity, vol. 20, no. 3, 2012, pp. 439-445.
27. Anvari, M., et al. "The Impact of Bariatric Surgery on Cancer Risk in Morbidly Obese Adults: The Hamilton Cohort Study." Surgical Endoscopy, vol. 31, no. 11, 2017, pp. 4432-4439.
28. Bhaskaran, K., et al. "Body-Mass Index and Risk of 22 Specific Cancers: A Population-Based Cohort Study of 5·24 Million UK Adults." The Lancet, vol. 384, no. 9945, 2014, pp. 755-765.
29. Christou, N. V., et al. "Surgical Options in the Treatment of Morbid Obesity: Bariatric Surgery." Surgical Clinics of North America, vol. 88, no. 6, 2008, pp. 1283-1309.
30. Gallagher, E. J., & LeRoith, D. "Diabetes, Obesity, and Cancer: The Mechanisms Underlying Increased Risk." Hormone Molecular Biology and Clinical Investigation, vol. 5, no. 2, 2011, pp. 11-17.
31. Goodwin, P. J., et al. "Insulin Levels and Breast Cancer Outcome." Journal of Clinical Oncology, vol. 20, no. 1, 2002, pp. 42-51.
32. Iyengar, N. M., et al. "Obesity and Cancer Mechanisms: Tumor Microenvironment and Inflammation." Journal of Clinical Oncology, vol. 34, no. 35, 2016, pp. 4270-4276.
33. Lauby-Secretan, B., et al. "Body Fatness and Cancer—Viewpoint of the IARC Working Group." New England Journal of Medicine, vol. 375, no. 8, 2016, pp. 794-798.
34. Renehan, A. G., et al. "Insulin Resistance and Cancer." British Journal of Cancer, vol. 100, no. 7, 2009, pp. 886-889.
35. Schauer, P. R., et al. "Bariatric Surgery versus Intensive Medical Therapy for Diabetes — 3-Year Outcomes." New England Journal of Medicine, vol. 370, no. 21, 2014, pp. 2002-2013.
36. Sjöström, L., et al. "Effects of Bariatric Surgery on Mortality in Swedish Obese Subjects." New England Journal of Medicine, vol. 367, no. 8, 2012, pp. 740-748.
37. Ward, Z. J., et al. "The Association between Bariatric Surgery and Cancer Incidence: A Long-Term Population-Based Study." Annals of Surgery, vol. 260, no. 5, 2014, pp. 983-989.