This K01 Career Development Award application proposes a multidisciplinary 4-year training program to provide the candidate, Dr. Deirdre K. Tobias, with the experience and resources necessary to launch a successful career as an independent nutrition and diabetes epidemiologist. The training plan, developed closely with primary mentor Dr. JoAnn Manson and co-mentor Dr. Frank B. Hu, will broaden Dr. Tobias'repertoire of research methodologies, including biomarker analysis, metabolomics, and systems epidemiology, and significantly strengthen her chronic disease epidemiology skill set. Dr. Tobias is an emerging and prolific epidemiologic researcher of nutritional and lifestyle determinants of gestational diabetes (GDM) and type 2 diabetes;however, additional training in important analytical tools is necessary to achieve her long-term goals of being an independent and successful researcher in population health. Additionally, these activities will give her extensive training in project management, which is essential for her future independent research endeavors. The Harvard School of Public Health is a leading research and academic institution within the large Boston-area medical community. This network will provide vast resources and opportunities for Dr. Tobias during this important developmental period, including cutting-edge seminar series, relevant advanced coursework, training in the responsible conduct of research, and scientific conferences. The proposed research project offers the candidate an outstanding opportunity to become proficient in the novel area of metabolomics research by evaluating the role of promising individual metabolites with diabetes risk among high risk women with prior GDM in the Nurses'Health Study II. Stored fasting plasma samples from the NHS II cohort will be used to measure a well-validated panel of water soluble and amino acid metabolites, including branched chain and aromatic amino acids, gut flora metabolites (e.g., choline, TMAO), glutamate, glutamine, and the recently cited ?-aminoisobutyric acid (BAIBA). From this, an efficient prospective nested case-control design is proposed to analyze 200 diabetes cases and 200 matched controls with a history of GDM to identify metabolites associated with incident type 2 diabetes. Additionally, the project includes investigation of the known dietary sources for several of these metabolites with type 2 diabetes risk, among the 6,400 women with GDM in NHS II. This cohort is uniquely well-suited to assess these relationships, due to repeated dietary and lifestyle measures and 25 years of follow-up. Findings from the research proposed in this application may inform public health strategies to prevent type 2 diabetes in a high risk population, while increasing our understanding of the mechanisms by which diet confers diabetes risk among women with a history of GDM. The outstanding training opportunities in novel research areas such as metabolomics and systems epidemiology with key leaders in the fields will greatly enhance the skills and capabilities of the candidate, and position her for a successful and productive career as a nutrition and diabetes epidemiologist.
Women with prior gestational diabetes are at substantially greater risk of developing type 2 diabetes compared to parous women without such history. The proposed research project will identify potential targets for intervention and prevention in this high risk group by assessing the independent contributions of several key metabolites and their dietary sources on diabetes risk among with women with a history of gestational diabetes.
|Tobias, Deirdre K; Clish, Clary; Mora, Samia et al. (2018) Dietary Intakes and Circulating Concentrations of Branched-Chain Amino Acids in Relation to Incident Type 2 Diabetes Risk Among High-Risk Women with a History of Gestational Diabetes Mellitus. Clin Chem 64:1203-1210|
|Gicevic, Selma; Gaskins, Audrey J; Fung, Teresa T et al. (2018) Evaluating pre-pregnancy dietary diversity vs. dietary quality scores as predictors of gestational diabetes and hypertensive disorders of pregnancy. PLoS One 13:e0195103|
|Tobias, Deirdre K; Akinkuolie, Akintunde O; Chandler, Paulette D et al. (2018) Markers of Inflammation and Incident Breast Cancer Risk in the Women's Health Study. Am J Epidemiol 187:705-716|
|Tobias, Deirdre K; Lawler, Patrick R; Harada, Paulo H et al. (2018) Circulating Branched-Chain Amino Acids and Incident Cardiovascular Disease in a Prospective Cohort of US Women. Circ Genom Precis Med 11:e002157|
|Powe, Camille E; Tobias, Deirdre K; Michels, Karin B et al. (2017) History of Gestational Diabetes Mellitus and Risk of Incident Invasive Breast Cancer among Parous Women in the Nurses' Health Study II Prospective Cohort. Cancer Epidemiol Biomarkers Prev 26:321-327|
|Tobias, Deirdre K (2017) Addressing Reverse Causation Bias in the Obesity Paradox Is Not ""One Size Fits All"". Diabetes Care 40:1000-1001|
|AlEssa, Hala B; Malik, Vasanti S; Yuan, Changzheng et al. (2017) Dietary patterns and cardiometabolic and endocrine plasma biomarkers in US women. Am J Clin Nutr 105:432-441|
|Tobias, Deirdre K; Stuart, Jennifer J; Li, Shanshan et al. (2017) Association of History of Gestational Diabetes With Long-term Cardiovascular Disease Risk in a Large Prospective Cohort of US Women. JAMA Intern Med 177:1735-1742|
|Alessa, Hala B; Chomistek, Andrea K; Hankinson, Susan E et al. (2017) Objective Measures of Physical Activity and Cardiometabolic and Endocrine Biomarkers. Med Sci Sports Exerc 49:1817-1825|
|Bao, Wei; Tobias, Deirdre K; Hu, Frank B et al. (2016) Pre-pregnancy potato consumption and risk of gestational diabetes mellitus: prospective cohort study. BMJ 352:h6898|
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