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. 2022 Mar 24:13:829411.
doi: 10.3389/fendo.2022.829411. eCollection 2022.

The Resting-State Brain Network Functional Connectivity Changes in Patients With Acute Thyrotoxic Myopathy Based on Independent Component Analysis

Yanfang Li  1 , Min Ling  2 , Song Huang  3 , Xinghuan Liang  3 , Yingfen Qin  3 , Zuojie Luo  3 , Jia Zhou  3
Affiliations

The Resting-State Brain Network Functional Connectivity Changes in Patients With Acute Thyrotoxic Myopathy Based on Independent Component Analysis

Yanfang Li et al. Front Endocrinol (Lausanne). .

Abstract

Objective: The independent component analysis (ICA) was applied to explore the correlation between clinical manifestation and the functional connectivity changes of the sensorimotor network (SMN) and left frontoparietal network (LFPN) in patients with acute thyrotoxic myopathy (ATM), which was expected to provide a functional imaging basis for the exploration of the pathophysiological mechanism of ATM.

Methods: 13 ATM patients (ATM) and 12 non-ATM patients (nATM) who met the diagnostic and inclusion criteria were enrolled. Their resting-state brain function images were obtained with resting-state functional magnetic resonance imaging (rs-fMRI). GIFT software was used for independent component analysis to obtain the brain regions with SMN and LFPN changes. The correlation between the functional connectivity of these brain regions and clinical indicators was calculated.

Results: The SMN functional connectivity of ATM patients was increased at the posterior lobe of cerebellum, anterior lobe of cerebellum, right superior temporal gyrus, left cingulate gyrus, left precuneus, and left postcentral gyrus compared with that of nATM patients. However, it was decreased at the occipital lobe, right dorsolateral superior frontal gyrus, paracentral lobule, angular gyrus, and superior parietal gyrus (FDR correction, P<0.05). The LFPN functional connectivity of ATM patients was increased at the posterior lobe of cerebellum, middle temporal gyrus, inferior temporal gyrus, and right cingulate gyrus compared with that of nATM patients; but was decreased at frontal lobe, parahippocampal gyrus, precentral gyrus and postcentral gyrus (FDR correction, P<0.05) Correlation analysis results showed that the enhancement of SMN functional connection at right superior temporal gyrus was significantly negatively correlated with the free thyroxine level, and the decrease of SMN functional connectivity at occipital lobe was significantly positively correlated to the thyroid stimulating hormone level. The SMN and LFPN functional connectivity changes in other brain regions were not found to be significantly correlated with thyroid function parameters.

Conclusion: The bulbar paralysis (such as dysphagia, dysarthria) in ATM patients may be related to the functional connectivity changes of resting-state SMN and LFPN. The fMRI is expected to be one of the objective imaging indicators for the early clinical intervention of ATM patients.

Keywords: (ICA) independent component analysis; (LFPN) left frontoparietal network; (SMN) sensorimotor network; acute thyrotoxic myopathy; functional magnetic resonance imaging; resting-state brain network.

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Conflict of interest statement

The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

Figures

Figure 1
Figure 1
The abnormal brain regions and functional connectivity found in the sensorimotor network in ATM and nATM groups. Red indicates the brain region with enhanced functional connectivity in the ATM group, and blue indicates the brain region with the weakened functional connectivity.
Figure 2
Figure 2
The abnormal brain regions and functional connectivity found in the left frontoparietal network in ATM and nATM groups. Red indicates the brain region with enhanced functional connectivity in the ATM group, and blue indicates the brain region with the weakened functional connectivity.
Figure 3
Figure 3
The significant correlation between functional connections in the right superior temporal gyrus and FT4 levels.
Figure 4
Figure 4
The significant correlation between occipital lobe functional connectivity and thyroid stimulating hormone levels.
See this image and copyright information in PMC

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