Mayo Clinic Minute: Is Alzheimer's Type 3 diabetes?

Are some cases of Alzheimer's disease triggered by a form of diabetes in the brain? Perhaps they are, according to researchers. Mayo Clinic's campuses in Rochester, Minnesota, and Jacksonville, Florida, recently participated in a multi-institution clinical study, testing whether a new insulin nasal spray can improve Alzheimer’s symptoms.

“This study has furthered our understanding of the gene that is the strongest genetic risk factor known for Alzheimer’s disease,” says Dr. Guojun Bu, a Mayo Clinic neuroscientist. "About 20 percent of the human population carries this riskier form of [the gene] APOE, called the E4," says Dr. Bu. It's believed that more than 50 percent of Alzheimer’s cases can be linked to APOE4, according to the study, which was published in Neuron.

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