Skip to main content

positron emission tomography

Creative Minds: New Piece in the Crohn’s Disease Puzzle?

Posted on by

Gwendalyn Randolph

Gwendalyn Randolph

Back in the early 1930s, Burrill Crohn, a gastroenterologist in New York, decided to examine intestinal tissue biopsies from some of his patients who were suffering from severe bowel problems. It turns out that 14 showed signs of severe inflammation and structural damage in the lower part of the small intestine. As Crohn later wrote a medical colleague, “I have discovered, I believe, a new intestinal disease …” [1]

More than eight decades later, the precise cause of this disorder, which is now called Crohn’s disease, remains a mystery. Researchers have uncovered numerous genes, microbes, immunologic abnormalities, and other factors that likely contribute to the condition, estimated to affect hundreds of thousands of Americans and many more worldwide [2]. But none of these discoveries alone appears sufficient to trigger the uncontrolled inflammation and pathology of Crohn’s disease.

Other critical pieces of the Crohn’s puzzle remain to be found, and Gwendalyn Randolph thinks she might have her eyes on one of them. Randolph, an immunologist at Washington University, St. Louis, suspects that Crohn’s disease and other related conditions, collectively called inflammatory bowel disease (IBD), stems from changes in vessels that carry nutrients, immune cells, and possibly microbial components away from the intestinal wall. To pursue this promising lead, Rudolph has received a 2015 NIH Director’s Pioneer Award.

Imaging Willpower: Using Brain Scans to Explore Obesity

Posted on by

Apple pieFor some people, the smell of Mom’s home-baked pie, the sight of an ice cream truck, or the sound of sizzling French fries can trigger a feeding frenzy. But others find it much easier to resist such temptations. What’s the explanation?

You might think it’s sheer willpower. But a recent study in the journal Molecular Psychiatry suggests the answer to what fuels susceptibility to food cues may be far more complex, related to subtle differences in brain chemistry [1].

Personalizing Depression Treatment with Brain Scans

Posted on by

Brain scan showing three red dots, the largest of which is in the cross hairs of two green lines

Caption: Depressed patients with higher activity in the anterior insula (where the green lines intersect) did better with medication than cognitive behavior therapy.
Source: Helen Mayberg, Emory University School of Medicine, Department of Psychiatry and Behavioral Sciences

Today, figuring out who will benefit from which antidepressant medication is hit or miss—physicians prescribe a medication to treat major depression for two to three months, and then gauge the results. This trial and error is frustrating and expensive; typically only about 40% get well after this first treatment or see an improvement in symptoms. The other 60% must try a different drug or some other approach. In a new NIH funded study, researchers showed how brain scans could predict which individuals would benefit from a medication and which might respond better to psychotherapy [1].