1. Quantitative susceptibility mapping reveals brain iron accumulation in minimal hepatic encephalopathy: associations with neurocognitive changes.
- Author
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Cai LM, Zeng JY, Huang HW, Tang Y, Li D, Li JQ, and Chen HJ
- Subjects
- Humans, Male, Female, Middle Aged, Adult, Cognition physiology, Liver Cirrhosis metabolism, Liver Cirrhosis diagnostic imaging, Liver Cirrhosis psychology, Liver Cirrhosis complications, Aged, Neuropsychological Tests, Brain Mapping, Hepatic Encephalopathy metabolism, Hepatic Encephalopathy diagnostic imaging, Hepatic Encephalopathy psychology, Iron metabolism, Magnetic Resonance Imaging, Brain metabolism, Brain diagnostic imaging
- Abstract
Brain iron deposition is correlated with minimal hepatic encephalopathy (MHE). This study aimed to investigate the pattern of altered iron distribution, using quantitative susceptibility mapping (QSM), and to clarify the relationship between iron deposition and neurocognitive changes in MHE. We enrolled 32 cirrhotic patients without MHE (NHE), 21 cirrhotic patients with MHE, and 24 healthy controls, and used the Psychometric Hepatic Encephalopathy Score (PHES) to assess neurocognitive function. All participants underwent magnetic resonance scans with a gradient-echo sequence reconstructing for QSM. We performed voxel-wise and region-of-interest (ROI)-wise analyses to investigate the QSM difference across three groups and to examine the relationship between susceptibility value and PHES. MHE patients exhibited increased susceptibility value in widespread brain areas (family-wise error (FWE)-corrected P < 0.05), which was located mainly in cognition-related regions (such as the prefrontal lobe, precuneus, inferior parietal lobule, insula, thalamus, and superior longitudinal fasciculus), sensorimotor regions (such as the precentral/postcentral gyrus, superior parietal lobule, and posterior corona radiata), visual regions (such as the occipital cortex and posterior thalamic radiation), and auditory regions (such as the temporal lobe). NHE patients also followed a trend of increasing susceptibility in the scattered brain regions, but which did not reach statistical significance (FWE-corrected P > 0.05). We observed negative correlations between cirrhotic patients' PHES and regional susceptibility values (FWE-corrected P < 0.05). Brain iron accumulation (measured using QSM) contributes to cognitive impairments in MHE patients. QSM could provide new insights into the pathogenesis of MHE and facilitate monitoring disease development., Competing Interests: Declarations. Ethics approval: This study was performed in accordance with the principles outlined in the Helsinki Declaration. Consent to participate: Informed consent was obtained from all individual participants included in the study. Consent to publish: The authors affirm that human research participants provided informed consent for publication of the images in Figs. 1, 2, 3, 4, 5 and 6. Competing interests: The authors declare no competing interests., (© 2024. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.)
- Published
- 2024
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