AUTHOR=Kang Sung Hoon , Yoo Heejin , Cheon Bo Kyoung , Kim Jun Pyo , Jang Hyemin , Kim Hee Jin , Kang Mira , Oh Kyungmi , Koh Seong-Beom , Na Duk L. , Chang Yoosoo , Seo Sang Won 

TITLE=Sex-specific relationship between non-alcoholic fatty liver disease and amyloid-β in cognitively unimpaired individuals

JOURNAL=Frontiers in Aging Neuroscience

VOLUME=Volume 15 - 2023

YEAR=2023

URL=https://www.frontiersin.org/journals/aging-neuroscience/articles/10.3389/fnagi.2023.1277392

DOI=10.3389/fnagi.2023.1277392

ISSN=1663-4365

ABSTRACT=Background: Non-alcoholic fatty liver disease (NAFLD) is known to be associated with a high risk of clinically diagnosed Alzheimer's disease (AD). Additionally, the prevalence of NAFLD and AD is higher in elderly females than in males. However, a sex-specific association between NAFLD and amyloid-beta (Aβ) deposition remains unclear. Therefore, we investigated the sex-specific relationship between NAFLD and Aβ deposition in a large-sized cohort of cognitively unimpaired (CU) individuals.: We enrolled 673 (410 [60.9%] females and 263 [39.1%] males) CU individuals aged ≥ 45 years who underwent Aβ positron emission tomography (PET). The presence of NAFLD, assessed using the hepatic steatosis index, and the severity of NAFLD, assessed using the Fibrosis-4 index, were considered predictors. Aβ deposition on PET was considered as an outcome.Results: Females had a higher frequency of NAFLD than males (48% and 23.2%, p<0.001).Among females, the presence of NAFLD (β=0.216, p<0.001) was predictive of increased Aβ deposition, whereas among males, the presence of NAFLD (β=0.191, p=0.064)  was not associated with Aβ deposition. Among females, the presence of NAFLD with low (β=0.254, p=0.039), intermediate (β=0.201, p=0.006), and high fibrosis (β=0.257, p=0.027) was predictive of increased Aβ deposition. Aβ deposition also increased as the severity of NAFLD increased in females (p for trend=0.001).We highlight the marked influence of NAFLD and its severity on the risk of Aβ deposition in relation to sex. Furthermore, our findings suggest that sex-specific strategies regarding the management of NAFLD are necessary for the prevention of Aβ deposition.