11:45 am - Friday December 15, 2017

Obesity may actually alter our sense of taste

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Obesity may actually alter our sense of taste
Obesity may actually alter our sense of taste

Washington – A new study has suggested that obesity could change the way our tongues react to different foods.

Lead scientist Kathryn Medler, PhD, UB associate professor of biological sciences, said that studies have shown that obesity can lead to alterations in the brain, as well as the nerves that control the peripheral taste system, but no one had ever looked at the cells on the tongue that make contact with food.

She said that what they see is that even at this level — at the first step in the taste pathway — the taste receptor cells themselves are affected by obesity, asserting that the obese mice have fewer taste cells that respond to sweet stimuli, and they don’t respond as well.

The new study compared 25 normal mice to 25 of their littermates who were fed a high-fat diet and became obese.

To measure the animals’ response to different tastes, the research team looked at a process called calcium signaling. When cells “recognize” a certain taste, there is a temporary increase in the calcium levels inside the cells, and the scientists measured this change.

The results: Taste cells from the obese mice responded more weakly not only to sweetness but, surprisingly, to bitterness as well. Taste cells from both groups of animals reacted similarly to umami, a flavor associated with savory and meaty foods.

A new study has been published in the journal PLOS ONE.

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