The effects of traumatic brain Injury, post-traumatic stress disorder on Amyloid-β associated network hyperconnectivity and progression of gray matter atrophy
{"title":"The effects of traumatic brain Injury, post-traumatic stress disorder on Amyloid-β associated network hyperconnectivity and progression of gray matter atrophy","authors":"Susanne G. Mueller","doi":"10.1016/j.nicl.2025.103810","DOIUrl":null,"url":null,"abstract":"<div><h3>Background</h3><div>Amyloid-β associated network hypersynchrony is an early manifestation of pre-clinical Alzheimer’s Disease (AD). The overall goal was to investigate a. how TBI and PTSD influence hypersynchrony expression and b. how progressing gray matter atrophy affects hypersynchrony expression.</div></div><div><h3>Methods</h3><div>T1-weighted images, resting-state fMRIs and amyloid-β SUVRs were obtained from 234 DoD-ADNI subjects with or without TBI and/or PTSD. The denoised BOLD signal from 382 rois was extracted with CONN and dynamic resting state analysis was used to identify 8 states including one corresponding to a hypersynchrony state (HSS). SuStaIn with gray matter volumes and amyloid-β SUVR as inputs was used to identify 2 subtypes with progressive gray matter loss.</div></div><div><h3>Results</h3><div>HSS dwell-time correlated positively with amyloid-β (Kendall tau = 0.125,p = 0.047) and tau Braak stage 5&6 SUVR (Kendall tau = 0.200,p = 0.035). TBI increased the likelihood to observe the HSS (81 % with vs. 18 % wo TBI p < 0.001) as did a diagnosis of PTSD (67.4 % with vs. 32.6 % wo PTSD, p = 0.003). The SuStaIn subtypes differed mostly by the timing of the amyloid-β build-up but not by atrophy pattern. Subtype 2 had higher amyloid-β loads and longer HSS dwell-times than subtype 1 that had higher CAPS scores than subtype 2. Gray matter atrophy did not influence HSS dwell-time.</div></div><div><h3>Conclusion</h3><div>TBI and PTSD increased the likelihood to observe HSS. HSS dwell time was determined by AD pathology severity. The subtype characteristics indicate that PTSD drives gray matter loss in subtype 1 and AD pathology that in subtype 2. Severity of gray matter atrophy influenced neither HSS occurrence nor intensity.</div></div>","PeriodicalId":54359,"journal":{"name":"Neuroimage-Clinical","volume":"47 ","pages":"Article 103810"},"PeriodicalIF":3.4000,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Neuroimage-Clinical","FirstCategoryId":"3","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2213158225000804","RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"NEUROIMAGING","Score":null,"Total":0}
引用次数: 0
Abstract
Background
Amyloid-β associated network hypersynchrony is an early manifestation of pre-clinical Alzheimer’s Disease (AD). The overall goal was to investigate a. how TBI and PTSD influence hypersynchrony expression and b. how progressing gray matter atrophy affects hypersynchrony expression.
Methods
T1-weighted images, resting-state fMRIs and amyloid-β SUVRs were obtained from 234 DoD-ADNI subjects with or without TBI and/or PTSD. The denoised BOLD signal from 382 rois was extracted with CONN and dynamic resting state analysis was used to identify 8 states including one corresponding to a hypersynchrony state (HSS). SuStaIn with gray matter volumes and amyloid-β SUVR as inputs was used to identify 2 subtypes with progressive gray matter loss.
Results
HSS dwell-time correlated positively with amyloid-β (Kendall tau = 0.125,p = 0.047) and tau Braak stage 5&6 SUVR (Kendall tau = 0.200,p = 0.035). TBI increased the likelihood to observe the HSS (81 % with vs. 18 % wo TBI p < 0.001) as did a diagnosis of PTSD (67.4 % with vs. 32.6 % wo PTSD, p = 0.003). The SuStaIn subtypes differed mostly by the timing of the amyloid-β build-up but not by atrophy pattern. Subtype 2 had higher amyloid-β loads and longer HSS dwell-times than subtype 1 that had higher CAPS scores than subtype 2. Gray matter atrophy did not influence HSS dwell-time.
Conclusion
TBI and PTSD increased the likelihood to observe HSS. HSS dwell time was determined by AD pathology severity. The subtype characteristics indicate that PTSD drives gray matter loss in subtype 1 and AD pathology that in subtype 2. Severity of gray matter atrophy influenced neither HSS occurrence nor intensity.
期刊介绍:
NeuroImage: Clinical, a journal of diseases, disorders and syndromes involving the Nervous System, provides a vehicle for communicating important advances in the study of abnormal structure-function relationships of the human nervous system based on imaging.
The focus of NeuroImage: Clinical is on defining changes to the brain associated with primary neurologic and psychiatric diseases and disorders of the nervous system as well as behavioral syndromes and developmental conditions. The main criterion for judging papers is the extent of scientific advancement in the understanding of the pathophysiologic mechanisms of diseases and disorders, in identification of functional models that link clinical signs and symptoms with brain function and in the creation of image based tools applicable to a broad range of clinical needs including diagnosis, monitoring and tracking of illness, predicting therapeutic response and development of new treatments. Papers dealing with structure and function in animal models will also be considered if they reveal mechanisms that can be readily translated to human conditions.