Genetic evidence for causal relationships between brain functional networks and domain-specific recovery after nondisabling ischemic stroke.
Overview
- Department of Rehabilitation, Zhongshan City People’s Hospital, Zhongshan, Guangdong, China
- Department of Cardiology, Shantou Central Hospital, Shantou, Guangdong, China
- Department of Endocrinology and Metabolism, Zhongshan City People’s Hospital, Zhongshan, Guangdong, China
- Department of Neurology, Affiliated Hangzhou First People’s Hospital, Westlake University School of Medicine, Hangzhou, Zhejiang, China
Abstract
Intrinsic brain networks are crucial for post-stroke recovery, but the causal relationships between specific networks and domain-specific recovery outcomes, as well as the role of lipid metabolism, remain unclear. This study leveraged Mendelian randomization (MR) to evaluate 191 resting-state functional magnetic resonance imaging (rs-fMRI) BOLD-derived phenotypes in relation to post-stroke recovery after nondisabling ischemic stroke. Genetic instruments for rs-fMRI phenotypes were derived from a UK Biobank genome-wide association study (n = 34,691). Outcomes included motor, cognitive, and global recovery after nondisabling ischemic stroke, assessed using longitudinal National Institutes of Health Stroke Scale subscales over 2 years (n = 1,270). Primary analyses used the multiplicative random-effects inverse-variance weighted method. A two-step MR analysis investigated whether brain networks mediate the effects of lipids on post-stroke outcomes. Higher BOLD-derived functional connectivity within the triple network (default mode network, central executive network, and salience network) was associated with better motor and cognitive outcomes. Higher genetically predicted orbitofrontal node amplitude in the limbic network correlated with better motor recovery, while stronger parieto-frontal connectivity was associated with cognitive recovery. Genetically proxied higher low-density lipoprotein cholesterol (LDL-C) was associated with poorer cognitive recovery, with evidence suggesting partial mediation through differences in BOLD-derived triple-network connectivity. This MR study supports a potential causal role of BOLD-derived functional network phenotypes, particularly the triple network, in motor and cognitive recovery, and further suggests that differences in triple-network connectivity act as a partial mediator linking elevated LDL-C liability to impaired cognitive recovery. These findings provide hypothesis-generating evidence for future mechanistic studies and for exploring whether specific brain network-targeted interventions could have a role in stroke recovery.
Reproduced under the paper's license (CC BY), from the paper cited above.
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Data
Datasets cited
- zenodo:5775047 — at Zenodo; found in “Data availability”
Data availability
Publicly available datasets were analyzed in this study. The summary level data for rs-fMRI phenotypes are available at https://
Reproduced under the paper's license (CC BY), from the paper cited above.
Versions
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Version 2, 28 September 2026
- Funding: added Traditional Chinese Medicine Bureau of Guangdong Province
Version 1, 27 September 2026: the first record
Recorded: type, language, journal, volume, pages, dates, 5 authors, 5 keywords, 15 MeSH terms, 45 references.
Cite
This paper
Cai, H., Huang, Z., Liang, J., Zhang, H., & Liu, Z. (2026). Genetic evidence for causal relationships between brain functional networks and domain-specific recovery after nondisabling ischemic stroke. Experimental biology and medicine (Maywood, N.J.), 251, 10948. https://
BibTeX
@article{cai2026genetic,
author = {Cai, Huan and Huang, Zhenchun and Liang, Jialin and Zhang, Hao and Liu, Zhonghua},
title = {{Genetic evidence for causal relationships between brain functional networks and domain-specific recovery after nondisabling ischemic stroke}},
journal = {Experimental biology and medicine (Maywood, N.J.)},
year = {2026},
month = jul,
volume = {251},
pages = {10948},
publisher = {Frontiers Media SA},
issn = {1535-3702},
doi = {10.3389/
url = {https://
pmid = {42516175},
pmcid = {PMC13402224}
}
RIS
TY - JOUR
AU - Cai, Huan
AU - Huang, Zhenchun
AU - Liang, Jialin
AU - Zhang, Hao
AU - Liu, Zhonghua
TI - Genetic evidence for causal relationships between brain functional networks and domain-specific recovery after nondisabling ischemic stroke
T2 - Experimental biology and medicine (Maywood, N.J.)
J2 - Exp Biol Med (Maywood)
PY - 2026
DA - 2026/
VL - 251
SP - 10948
SN - 1535-3702
PB - Frontiers Media SA
DO - 10.3389/
UR - https://
LA - en
ER -
CSL-JSON
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