Photo of Gerd BobePrincipal Investigator, Linus Pauling Institute 
Assistant Professor, Department of Animal Sciences

Office: 373 Linus Pauling Science Center
Telephone: (541) 737-1898
Fax: (541) 737-5077
Email Address: gerd.bobe@oregonstate.edu

Mailing/Express Delivery Address:
Gerd Bobe, Ph.D.
Linus Pauling Institute
Oregon State University
307 Linus Pauling Science Center 
Corvallis, OR 97331

Research Interests

This laboratory focuses on identifying biomarkers in humans and parallel animal models that are associated with colorectal and pancreatic cancer and can be modified by diet and dietary supplements, including micronutrients and polyphenols. Colorectal cancer is an important public health problem annually leading worldwide to over 0.5 million deaths and in the U.S. nearly 150,000 new cases and 50,000 deaths. Dietary change, both feasible and safe, represents a viable strategy for preventing colorectal cancer; however, dietary intervention trials often showed no protection. There is a need for biomarkers of exposure, risk, and response/efficacy to dietary interventions. Such biomarkers will provide crucial data to a) identify individuals at increased risk or early stages of colorectal carcinogenesis, b) measure compliance with dietary interventions, and c) predict individuals most likely to benefit from a long-term dietary intervention (i.e., personalized cancer prevention).

In collaborations with researchers at the National Cancer Institute, Pennsylvania State University, Ohio State University, Texas A&M University, and Tufts, we have been using prospective NCI-funded human cohort and nutrition studies and link them to USDA and Tufts food data bases to identify diets and dietary components with promise of efficacious cancer prevention, most notable flavonols. For dietary components showing efficacy, we have been identifying biomarkers of exposure, risk, and early dietary response through parallel human intervention and animal model studies in serum, feces, and tissue, most notable interleukin 6. The functional significance of the identified molecular targets in carcinogenesis will be tested using cell culture and transgenic mouse studies. The goal is to use the identified molecular targets and biomarkers in clinical trials to test the efficacy of diets and dietary supplements for cancer prevention.

Education

1997 M.S., Nutritional Physiology and Animal Breeding, Minor in Statistics, Iowa State University
2002 Ph.D., Animal Nutrition, Minor in Statistics, Iowa State University
2006 M.P.H., Public Health Nutrition, Johns Hopkins Bloomberg School of Public Health

Professional Experience

1992-2002 Graduate Research or Teaching Assistant, Departments of Animal Science, Biology, Biochemistry, Iowa State University, Ames, IA
2003-2005 Visiting Research Associate, Department of Food Science and Human Nutrition, National Food Safety and Toxicology Center, Michigan State University, East Lansing, MI
2005-2009 Cancer Prevention Fellow, Office of Preventive Oncology, Laboratory of Cancer Prevention, National Cancer Institute, Bethesda, MD
2009 Cancer Research Training Award Fellow, Laboratory of Cancer Prevention, National Cancer Institute, Frederick, MD
2009-present Assistant Professor, Department of Animal Sciences; Principal Investigator, Linus Pauling Institute; Adjunct Faculty, Department of Nutrition and Exercise Sciences, Oregon State University, Corvallis, OR

Honors and Awards

2004 Recipient of the Richard M. Hoyt Award for Graduate Student Research from the National Milk Producers Fed.
2005/2009 Recipient of the Cancer Research Training Award from the NCI's Cancer Prevention Fellowship Program
2006 Member of Delta Omega, Honorary Society for Public Health
2007/2009 Recipient of the Aflac Scholar-in-Training Award from American Association for Cancer Research (AACR)
2008 Recipient of the Cancer Prevention Training Merit Award from NCI

Professional Memberships

American Association for Cancer Research
American Dairy Science Association
American Society of Animal Science
American Society of Nutritional Science
American Society of Preventive Oncology
Institute of Food Technologists
Society for Experimental Biology and Medicine
Society for Nutrition Education and Behavior

Research Support

Identification of molecular targets and predictive biomarkers for dietary colon cancer prevention, NIH Office of Cancer Complimentary and Alternative Medicine.

How do dietary flavonoids protect against advanced colorectal adenoma recurrence? A molecular epidemiologic study in the Polyp Prevention Trial (PPT), NIH Office of Dietary Supplements.

Recent Publications

Traber MG, Leonard SW, Bobe G, Fu X, Saltzman E, Grusak MA, Booth SL (2015) α-Tocopherol disappearance rates from plasma depend on lipid concentrations: studies using deuterium-labeled collard greens in younger and older adults. Am J Clin Nutr, Epub ahead of print.

Watts EJ, Shen Y, Lansky EP, Nevo E, Bobe G, Traber MG. (2015) High environmental stress yields greater tocotrienol content while changing vitamin E profiles of wild emmer wheat seeds. J Med Food 18:216-223.

Hall JA, Bobe G, Vorachek WR, Kasper K, Traber MG, Mosher WD, Pirelli GJ, Gamroth M. (2014) Effect of supranutritional organic selenium supplementation on postpartum blood micronutrients, antioxidants, metabolites, and inflammation biomarkers in selenium-replete dairy cows. Biol Trace Elem Res 161:272-287.

Legette L, Karnpracha C, Reed RL, Choi J, Bobe G, Christensen JM, Rodriguez-Proteau R, Purnell JQ, Stevens JF. (2014) Human pharmacokinetics of xanthohumol, an antihyperglycemic flavonoid from hops. Mol Nutr Food Res 58:248-255.

Depner CM, Traber MG, Bobe G, Kensicki E, Bohren KM, Milne G, Jump DB. (2013) A metabolomic analysis of omega-3 fatty acid-mediated attenuation of western diet-induced nonalcoholic steatohepatitis in LDLR-/- mice. PLoS One 8:e83756.

Saud SM, Young MR, Jones-Hall YL, Ileva L, Evbuomwan MO, Wise J, Colburn NH, Kim YS, Bobe G. (2013) Chemopreventive activity of plant flavonoid isorhamnetin in colorectal cancer is mediated by oncogenic Src and ß-catenin. Cancer Res.73:5473-5484.

Moustafa ME, Carlson BA, Anver MR, Bobe G, Zhong N, Ward JM, Perella CM, Hoffmann VJ, Rogers K, Combs GF Jr, Schweizer U, Merlino G, Gladyshev VN, Hatfield DL. (2013) Selenium and selenoprotein deficiencies induce widespread pyogranuloma formation in mice, while high levels of dietary selenium decrease liver tumor size driven by TGFα. PLoS One. 8:e57389.

Arem H, Bobe G, Sampson J, Subar AF, Park Y, Risch H, Hollenbeck A, Mayne ST, Stolzenberg-Solomon RZ. (2013) Flavonoid intake and risk of pancreatic cancer in the National Institutes of Health-AARP Diet and Health Study Cohort. Br J Cancer.10:1168-1172.

Mentor-Marcel RA, Bobe G, Sardo C, Wang LS, Kuo CT, Stoner G, Colburn NH. (2012) Plasma cytokines as potential response indicators to dietary freeze-dried black raspberries in colorectal cancer patients. Nutr Cancer. 64:820-825.

Bobe G, Murphy G, Albert PS, Sansbury LB, Lanza E, Schatzkin A, Cross AJ. (2012) Dietary lignan and proanthocyanidin consumption and colorectal adenoma recurrence in the Polyp Prevention Trial. Int J Cancer. 130:1649-1659.

Bobe G, Lanza E, Albert PS, Sansbury LB, Schatzkin A, Cross AJ. (2012) Dietary lignan and proanthocyanidin consumption and colorectal adenoma recurrence in the Polyp Prevention Trial. Int J Cancer Prev. 130:1649-1655.

Bobe G, Murphy G, Albert PS, Sansbury LB, Young MR, Lanza E, Schatzkin A, Colburn NH, Cross AJ. (2011) Do interleukin polymorphisms play a role in the prevention of colorectal adenoma recurrence by dietary flavonols? Eur J Cancer Prev. 20:86-95.