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Why Some People Fail to Respond to Potentially Dangerous Drops in Their Blood Sugar

Why Some People Fail to Respond to Potentially Dangerous Drops in Their Blood Sugar

The brains of individuals with sort 1 diabetes react in another way to low blood sugar in contrast with wholesome adults, say Yale researchers.

The findings of their new examine, printed in the Journal of Medical Investigation, make clear why many sort 1 diabetics fail to reply to doubtlessly harmful drops in their blood sugar ranges.

In wholesome, non-diabetic adults, a drop in blood sugar stimulates the physique to make glucose and in addition search meals. However many people with sort 1 diabetes don’t have the identical responses to reductions in blood sugar that may outcome from insulin therapy.

To analyze why, the Yale-led group carried out MRI scans of people with sort 1 diabetes and wholesome adults who had been given insulin to induce low blood sugar. The mind photographs confirmed that in wholesome people, low blood sugar brought on modifications in 4 key areas of the mind which are linked to reward, motivation, and determination making.

Against this, about half of the kind 1 diabetics exhibited altered exercise solely in areas of the mind related to consideration. The remainder of the diabetics failed to present any mind modifications in response to even delicate low blood sugar.

The distinction in the 2 teams of diabetics was that some nonetheless had what’s known as “hypoglycemia consciousness” — the power to sense the bodily signs of low blood sugar — and the others didn’t.

The findings clarify why some sort 1 diabetics who’ve tailored to having low blood sugar don’t reply when their blood sugar will get too low, the researchers mentioned.

“There’s a progressive lack of coordinated mind response to low blood sugar as you go from wholesome grownup to conscious and unaware,” mentioned Janice Hwang, M.D., assistant professor of drugs and first creator on the examine. “The primary areas in the mind to go are related to regulating feeding conduct.”

The examine also can assist researchers decide how to restore low blood sugar consciousness in sufferers who’ve misplaced it, Hwang famous. New applied sciences designed to monitor blood sugar, might play an element in that effort, she mentioned.

Different examine authors are Lisa Parikh, Cheryl Lacadie, Dongju Search engine optimisation, Wai Lam, Muhammad Hamza, Christian Schmidt, Feng Dai, Anne-Sophie Sejling, Renata Belfort-DeAguiar, R. Todd Constable, Rajita Sinha, and Robert Sherwin.

This examine was supported in half by grants from the Nationwide Institutes of Well being, and the Yale Heart for Medical Investigation by way of the Medical Translational Science Award. Hwang and Sherwin obtain analysis help from Regeneron for work unrelated to this undertaking.

Publication: Janice Jin Hwang, et al., “Hypoglycemia unawareness in sort 1 diabetes suppresses mind responses to hypoglycemia,” Medical Investigation, 2018; doi:10.1172/JCI97696

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