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ToolsForno, Gonzalo, Vidal, Julie P., Rush, Phoebe, Tan, Rachel, Aggleton, John P., Barbeau, Emmanuel J. and Hornberger, Michael and Alzheimer's Disease Neuroimaging Initiative (2025) Mind the gap – Interthalamic adhesions in prodromal and clinical Alzheimer’s disease. Brain Research Bulletin, 231. ISSN 0361-9230
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Abstract
Background: The interthalamic adhesion (IA) is an anatomical bridge connecting the left and right thalamus. While prior studies have explored its prevalence and function in healthy populations, stroke, hydrocephalus, and schizophrenia, none have examined the IA in the context of Alzheimer’s disease (AD). This study aims to analyse the prevalence of the IA in the prodromal to clinical AD continuum and evaluate the association with AD cerebrospinal fluid (CSF) biomarkers and thalamic, hippocampal, and ventricular volumes. Method: IA prevalence was assessed in 542 MRIs from the Alzheimer’s Disease Neuroimaging Initiative (ADNI), including healthy controls (HC), early mild cognitive impairment (EMCI), late MCI (LMCI), and AD patients. Inter-rater reliability was assessed with Cohen’s Kappa, and a chi-squared test (χ2) examined rater differences. Binary and multinomial logistic regressions evaluated the effect of CSF biomarkers, volumes, and clinical data on IA prevalence and type. Results: There were no significant differences in IA prevalence or variants across the four groups. The single IA was the most common type, while bilobar and double variants were less frequent. Post-hoc analysis, however, showed that AD CSF biomarker measures showed positive associations with the broad IA subtype in HC and EMCI. Conclusion: The study found no overall differences in IA prevalence or its variants related to prodromal or clinical AD. Still, elevated Aβ42, p-Tau levels, and larger thalamic volume were linked to a higher likelihood of a broad IA. These findings suggest that the IA may be involved in prodromal AD pathophysiological processes.
| Item Type: | Article |
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| Additional Information: | Data availability: Data will be made available on request. Acknowledgement: GF is supported by ANID (Fondecyt Postdoctoral Nº3250669). Data collection and sharing for this project was funded by the Alzheimer's Disease Neuroimaging Initiative (ADNI) (National Institutes of Health Grant U01 AG024904) and DOD ADNI (Department of Defense award number W81XWH-12–2–0012). ADNI is funded by the National Institute on Aging, the National Institute of Biomedical Imaging and Bioengineering, and through generous contributions from the following: AbbVie, Alzheimer’s Association; Alzheimer’s Drug Discovery Foundation; Araclon Biotech; BioClinica, Inc.; Biogen; Bristol-Myers Squibb Company; CereSpir, Inc.; Cogstate; Eisai Inc.; Elan Pharmaceuticals, Inc.; Eli Lilly and Company; EuroImmun; F. Hoffmann-La Roche Ltd and its affiliated company Genentech, Inc.; Fujirebio; GE Healthcare; IXICO Ltd.; Janssen Alzheimer Immunotherapy Research & Development, LLC.; Johnson & Johnson Pharmaceutical Research & Development LLC.; Lumosity; Lundbeck; Merck & Co., Inc.; Meso Scale Diagnostics, LLC.; NeuroRx Research; Neurotrack Technologies; Novartis Pharmaceuticals Corporation; Pfizer Inc.; Piramal Imaging; Servier; Takeda Pharmaceutical Company; and Transition Therapeutics. The Canadian Institutes of Health Research is providing funds to support ADNI clinical sites in Canada. Private sector contributions are facilitated by the Foundation for the National Institutes of Health (www.fnih.org). The grantee organization is the Northern California Institute for Research and Education, and the study is coordinated by the Alzheimer’s Therapeutic Research Institute at the University of Southern California. ADNI data are disseminated by the Laboratory for Neuro Imaging at the University of Southern California. |
| Faculty \ School: | Faculty of Medicine and Health Sciences > School of Health Sciences Faculty of Medicine and Health Sciences > Norwich Medical School |
| UEA Research Groups: | Faculty of Medicine and Health Sciences > Research Centres > Norwich Institute for Healthy Aging Faculty of Medicine and Health Sciences > Research Groups > Mental Health Faculty of Medicine and Health Sciences > Research Centres > Mental Health and Social Care (fka Lifespan Health) |
| Related URLs: | |
| Depositing User: | LivePure Connector |
| Date Deposited: | 02 Oct 2025 16:30 |
| Last Modified: | 07 Oct 2025 15:33 |
| URI: | https://ueaeprints.uea.ac.uk/id/eprint/100608 |
| DOI: | 10.1016/j.brainresbull.2025.111559 |
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