%0 Journal Article
%T The Importance of PET Imaging to Understanding Whole-Body Cortisol Metabolism in Alzheimer's Disease.
%A Bini J
%J J Alzheimers Dis
%V 99
%N 1
%D 2024 Apr 11
%M 38607759
%F 4.16
%R 10.3233/JAD-231463
%X Excess cortisol is associated with more severe cognitive decline, Alzheimer's disease, and related dementia phenotypes. The intracellular enzyme 11β-HSD1 regenerates active cortisol from inactive cortisone. In this current issue, high regional brain occupancy of Xanamemtrademark, determined by [11C]TARACT PET imaging of 11β-HSD1, in cognitively normal individuals and mild cognitive impartment/Alzheimer's disease (AD) patients is presented. In the future, comprehensive kinetic modeling using arterial sampling for occupancy studies, and whole-body PET imaging of 11β-HSD1 enzyme levels, in combination with stable isotope studies of cortisol metabolism, can provide broad insight into enzyme levels and activity in AD and other relevant diseases.