| Title: |
Relationships Between Microbiome‐derived Short Chain Fatty Acids and Alzheimer’s Disease Pathology Biomarkers: A Human Cohort Study |
| Authors: |
Kuehn, Jessamine F; Heston, Margo B.; Warren, Matthew F.; Kang, Jea Woo; Harding, Sandra; Davenport‐Sis, Nancy J; Kerby, Robert L.; Schiffmann, Emma C.; Wheeler, Joseph L.; Noughani, Hanna M; Forst, Allison A; Everitt, Grace; Shankar, Sushma; Mickol, Alissa; Zemberi, Justus; Chow, Hana; Zhang, Eric; Clements, Eleanor; Carlsson, Cynthia M.; Johnson, Sterling C.; Asthana, Sanjay; Zetterberg, Henrik; Blennow, Kaj; Bendlin, Barbara B.; Rey, Federico E. |
| Source: |
Alzheimer's & Dementia ; volume 20, issue S8 ; ISSN 1552-5260 1552-5279 |
| Publisher Information: |
Wiley |
| Publication Year: |
2024 |
| Collection: |
Wiley Online Library (Open Access Articles via Crossref) |
| Description: |
Background Alzheimer’s Disease (AD) is the most common form of dementia, and therapies that effectively halt disease progression are lacking. Short chain fatty acids (SCFAs), including acetate, propionate, and butyrate, are abundant gut bacterial metabolites produced via fermentation of dietary fibers and resistant starch. There is growing evidence that SCFAs may affect key neuropathological processes underlying AD, but their role is not well established. Understanding how gut microbial metabolites relate to AD biomarkers may help elucidate gut microbiome contributions to disease progression. Method Here, we measured levels of several SCFAs in fecal samples collected from 124 participants in the Microbiome Alzheimer’s Research Study (MARS) using headspace gas chromatography. Participants were enrolled in the Wisconsin Alzheimer’s Disease Research Center and Wisconsin Registry for Alzheimer’s Prevention, which track preclinical disease progression in cohorts enriched for AD risk. We performed multiple regressions to identify associations between SCFA abundance and diagnosis, amyloid positivity, age, sex, BMI, APOE status, and cerebrospinal fluid (CSF) biomarkers of AD. Result Acetate, propionate, and butyrate had significantly lower concentrations in females and in amyloid‐positive participants within both the full cohort and only cognitively unimpaired participants, suggesting that these associations may be preclinical. SCFAs had associations with several CSF biomarkers before FDR multiple comparison correction, within the full cohort and preclinically. Hexanoate and butyrate had negative associations with Aβ42/40; hexanoate had a positive association with sTREM2, a marker of microglial activation, and NfL, a marker of neurodegeneration. Isobutyrate had a negative association with YKL‐40, a marker of astrocytes. Preclinically, isobutyrate and isovalerate had a negative association with NfL, and acetate had a positive association with GFAP, a marker of CNS astrocytes. An exploratory analysis found a ... |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| DOI: |
10.1002/alz.094882 |
| Availability: |
https://doi.org/10.1002/alz.094882 |
| Rights: |
http://creativecommons.org/licenses/by/4.0/ |
| Accession Number: |
edsbas.4BE1E617 |
| Database: |
BASE |