Application of diffusion tensor imaging and functional alterations in evaluating brain alterations related to heatstroke in a rat model

作者全名:"Li, Qinglong; Han, Mingxing; Luo, Xunrong; Han, Xiao; Zheng, Lei; Li, Jun"

作者地址:"[Li, Qinglong; Han, Mingxing; Han, Xiao; Zheng, Lei; Li, Jun] Binzhou Med Univ, Dept Radiol, Yantai Affiliated Hosp, Yantai, Peoples R China; [Li, Qinglong; Han, Mingxing; Han, Xiao; Zheng, Lei] Binzhou Med Univ, Sch Med Imaging, Yantai, Peoples R China; [Luo, Xunrong] Chongqing Med Univ, Dept Radiol, Affiliated Hosp 1, Chongqing, Peoples R China; [Li, Jun] Binzhou Med Univ, Dept Radiol, Yantai Affiliated Hosp, 717 Jinbu St, Yantai 264100, Peoples R China"

通信作者:"Li, J (通讯作者),Binzhou Med Univ, Dept Radiol, Yantai Affiliated Hosp, 717 Jinbu St, Yantai 264100, Peoples R China."












关键词:Heatstroke; Resting-state functional magnetic resonance; imaging; Diffusion tensor imaging; Rat; Magnetic resonance imaging

摘要:"Objectives: To assess the alterations in resting-state functions and neural structures in the brain of a heatstroke rat model and explore the underlying relationship. Methods: In total, 17 male Sprague Dawley rats were randomly divided into a control group (CTRL, n = 7) and a heatstroke group (HS, n = 10). All rats underwent 7.0 T magnetic resonance imaging (MRI). T2-weighted imaging, resting-state functional MRI (rs-fMRI), and diffusion tensor imaging (DTI) were obtained. On day 25, the surviving HS group rats (the follow-up group, FU, n = 7) were scanned again. Results: Heatstroke resulted in functional alterations and structural damage in the cerebellar molecular layer (CML), right perirhinal area (PA), pretectal region (PR), right dentate gyrus, and external cortex of the inferior colliculus (ECIC). Further functional changes occur in the right temporal associative cortex (TAC), left retrosplenial cortex (RC), and CML during convalescence. The fractional anisotropy values were significantly positively correlated with the amplitude of low-frequency fluctuation (ALFF) (HS-CML: r = 0.746, p = 0.034; right PR: r = 0.648, p = 0.049; FU-right PA: r = 0.817, p = 0.025)/regional homogeneity (ReHo) ratio (HS-CML: r = 0.833, p = 0.008; ECIC: r = 0.678, p = 0.045) and negatively correlated with the ALFF (FU-left RC: r = -0.818, p = 0.024; right TAC: r = -0.813, p = 0.049). Conclusion: DTI and rs-fMRI allow meticulous monitoring of the progression of neurological and functional alterations in the brain after heatstroke."

基金机构:Natural Science Foundation of Shan-dong Province; [ZR2022MH064]

基金资助正文:Funding This work was supported by Natural Science Foundation of Shan-dong Province (ZR2022MH064) .