Type 2 Diabetes and Obesity Research
Over the past 3 decades, sedentary lifestyles coupled with excessive caloric intake have been major determinants to the increase in the prevalence of obesity and Type 2 diabetes mellitus (T2DM). According to the American Diabetes Association, there are over 29 million Americans now living with diabetes1. In adults, Type 2 diabetes accounts for 90 to 95 percent of all diagnosed cases2.
The UF Health Diabetes Institute is comprised of an interdisciplinary network of researchers and care providers at the University of Florida who are committed to unlocking the causes of T2DM and related disorders, identifying risk factors, and exploring novel ways to treat, educate, and ultimately prevent the disease.
Particularly among adults, diagnosis of type 1 vs. type 2 diabetes can be challenging. Around 5–15% of adults diagnosed with type 2 diabetes might actually have type 1 disease with islet autoantibodies present; if this is the case, perhaps as many as 50% of actual type 1 diabetes cases are misdiagnosed as type 2.3 In addition, rare genetic forms of diabetes, alternative to type 1 and 2, have been identified4,5. UF researchers are improving screening standards for diabetes to ensure accurate diagnoses of disease manifestation and offer an array of available safe, available treatment options which may help to predict future risk.
Identify at Risk
Currently two out of three adult Americans are overweight or obese; a precursor to type 2 diabetes. As obesity rates continue to rise, UF researchers examine ways to address the issue for all populations, including rural areas. A 2012 study led by University of Florida researchers found that almost 40 percent of rural adults were obese compared with just over 33 percent of urban adults6. Several lifestyle differences may contribute to higher obesity rates in rural areas, including a traditional farm diet of high-fat, high-calorie foods, and increased mechanization of rural occupations such as farming and logging.
Extending outward from the traditional role of diabetic complications, UF Health clinicians are increasing their attention to early diagnosis and treatment of a novel genre of lipotoxicity-related complications, including nonalcoholic fatty liver disease. A fatty liver is now the most common chronic liver condition in adult Americans and will soon be the leading cause of end-stage liver disease in patients that are obese or have Type 2 diabetes. As many as 80% of obese subjects and patients with diabetes have non-alcoholic fatty liver disease (NAFLD).
Although uncertain, this rather silent condition may lead to T2DM7, and it is likely that this condition carries an inherent health risk for patients diagnosed with cardiovascular disease, cirrhosis or liver cancer.
- UF researchers have discovered that the prevalence of prediabetes and newly diagnosed T2DM is 3x higher in obese patients with NAFLD compared to patients without fatty liver.
- T2DM is associated with worse liver disease, including a two to four-fold increase in advanced liver disease, cirrhosis and hepatocellular carcinoma.
- UF researchers found that sugars fructose and sucrose play a key role in the development of fatty liver and nonalcoholic steatohepatitis (NASH)8.
UF researchers are also working to improve screening for peripheral arterial disease (PAD); a condition that carries an inherent risk for type 2 diabetes, stroke, morbidity and death. PAD occurs in 29% of patients over the age of 70 or in patients between 50 to 69 years old who have diabetes or past history of smoking.
Interdisciplinary research efforts at UF Health focus on:
- Evaluating new pharmacological agents in the treatment and management of T2DM10
- Routine screening of NAFLD- Non-invasive imaging techniques (MRI, MRS) are employed to screen patients with NAFLD for T2DM and NASH, and liver biopsies are performed in individuals who are at highest risk of disease progression
- Exploring Patient Metabolic Profile- UF research continues to unlock the complex role of ethnic makeup in patients diagnosed with NAFLD, such as high rates of sedentarism, obesity, and Hispanic ancestry
- Identifying plasma biomarkers for diagnosis- Basic research labs focus on understanding the role of mitochondrial metabolism in the pathophysiology of obesity, insulin resistance, and fatty liver and defining how ‘nutrient overload’ causes alterations in glucose and mitochondrial metabolism in the liver9
- Employing novel imaging techniques (ie transient elastography)- Evalute dysfuntcional metabolic pathways in the liver which could be a target for future therapeutic interventions
- Combining surgery, diet, and exercise techniques
Just a decade ago type 2 diabetes was known as “adult-onset diabetes,” but with so many young people being diagnosed, the term had to be dropped. Approximately one out of three children ages 9-17 are overweight or obese, raising concerns about the health of future generations. And new science shows that the progression of diabetes-onset happens more rapidly in children than in adults. It’s also more challenging to treat in the younger generation. Investigators like Dr. Janet Silverstein have provided decades’ worth of evidence-based recommendations concerning this phenomenon, and development of type 2 diabetes among youth and teens. Current research interests include:
- Medication management options for reducing caloric intake (ie incretins)11
- Assesing the benefits and risks of using adult diabetes medications in pediatric populations (ie metformin)12
- Addressing unique pediatric-to-adult healthcare provider transition issues13
- Reducing the intake of sugar-sweetened beverages
- Novel therapies targeting physiologic modalities alternative to enhancing or replacing insulin secretion
The TODAY Genetics study explores the the role genetics plays in type 2 diabetes mellitus (T2DM), insulin resistance and cardiac risk in youth. The information made available through this study may help scientists to develop new diagnostic tests, new treatments and new ways to prevent diseases.
The Healthy Kids Program, sponsored by the University of Florida and the Cooperative Extension Offices, is designed to help parents and children ages 3 to 7 who are at the higher end of the growth chart improve diet, increase physical activity and modify the home environment in order to promote healthy lifestyles. The no-cost program helps families throughout the state work together to learn how to manage real-life problems and make gradual changes.
1. American Diabetes Association. Diabetes Statistics.
2. National Diabetes Education Program. The Facts About Diabetes.
3. Tuomi T. Type 1 and type 2 diabetes: what do they have in common? Diabetes 2005; 54 (s uppl 2): 40–45.
4. Steck AK, Winter WE. Review on monogenic diabetes. Curr Opin Endocrinol Diabetes Obes. 2011 Aug;18(4):252-8.
5. Concannon P, Rich SS, Nepom GT. Genetics of type 1A diabetes. N Engl J Med 2009; 360: 1646–54.
6. Befort, C. A., Nazir, N. and Perri, M. G. (2012), Prevalence of Obesity Among Adults From Rural and Urban Areas of the United States: Findings From NHANES (2005-2008). The Journal of Rural Health, 28: 392–397.
7. Lomonaco R, Cusi K. Non-alcoholic fatty liver disease (NAFLD) in diabetes: distraction or impending disaster? Evidence-Based Management of Diabetes; 2012 (Chapter 21).
8. Sautin, Y, Ishimoto, T, et. al. High-Fat and High-Sucrose (Western) Diet Induces Steatohepatitis That Is Dependent on Frucotkinase. Hepatology 2013: 1632-1643.
9. Cusi, K, Chang, Z, et. al. Limited value of plasma cytokeratin-18 as a biomarker for NASH and fibrosis in patients with non-alcoholic fatty liver disease. J Hepatol. 2014 Jan;60(1):167-74.
10. Lomonaco R, Cusi K., et. al. The Future of Thiazolidinedione Therapy in the Management of Type 2 Diabetes Mellitus. Current Diabetes Reports 2013; Volume 13, Issue 3, pp 329-341
11. Wood JR, Silverstein J. Incretins and amylin in pediatric diabetes: new tools for management of diabetes in youth. Curr Opin Pediatr. 2013 Aug;25(4):502-8.
12. Copeland K, Silverstein J, Moore K. Management of newly diagnosed type 2 diabetes mellitus (T2DM) in children and adolescents. Pediatrics 2013; 131:364–382.
13. Cusi, K., Schatz, D., Turner, J., Strumph, P. Healthcare Transition from Pediatric to Adult Medical Homes in Diabetes Mellitus. Endocrine Practice. Feb 2014 24(2);1-25.