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Using a novel method, Whitehead Institute researchers have determined how mutations that are not located within genes are identified through genome-wide association studies (GWAS) and can contribute to sporadic Parkinson’s disease, the most common form of the condition. The approach could be used to analyze GWAS results for other sporadic diseases with genetic causes, such as multiple sclerosis, diabetes, and cancer.

Whitehead Institute researchers have elucidated how the growth-regulating metabolic pathway known as mTORC1 (for mechanistic target of rapamycin complex 1) senses the amino acid arginine. This nutrient sensor may represent a novel therapeutic target for controlling mTORC1, whose activity is often dysregulated in a variety of diseases, including diabetes and cancer. 

Over the past decade, studies have found that obesity and eating a high-fat, high-calorie diet are significant risk factors for many types of cancer. Now, a new study from Whitehead Institute and MIT’s Koch Institute for Integrative Cancer Research reveals how a high-fat diet makes the cells of the intestinal lining more likely to become cancerous.

The germinal centers that form in the body’s lymph nodes work as a fitness boot camp in which B cells evolve to produce antibodies of increasingly higher affinity to an invading pathogen. This new finding from Whitehead Institute scientists overturns a previously held notion that only a narrow range of B cells can survive this training and go on to secrete high-affinity antibodies. This revised understanding may aid development of effective vaccines against HIV, influenza, and other viruses that mutate rapidly.