Inhomogeneous magnetization transfer MRI of white matter structures in the hypomyelinated shiverer mouse brain.

Inhomogeneous magnetization transfer MRI of white matter structures in the hypomyelinated shiverer mouse brain.
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低髓鞘震颤小鼠脑内白色物质结构的非均匀磁化传递MRI。

DOI:
10.1002/mrm.29207
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发表时间:
2022-07
影响因子:
3.3
通讯作者:
Zhang, Jiangyang
Zhang, Jiangyang
中科院分区:
医学3区
文献类型:
--
作者:
Lee, Choong Heon;Walczak, Piotr;Zhang, Jiangyang

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非均匀磁化传递(ihMT)MRI是唯一敏感的髓鞘与脂质作为其对比度的主要来源。在这项研究中,我们调查了ihMT是否可以检测到白色物质结构的低髓鞘震颤小鼠脑,一个模型的髓鞘形成障碍。常规MT和ihMT图像是使用先前报道的优化饱和参数在7特斯拉下从离体Rag 2 −/−对照和颤抖小鼠大脑中获得的。ihMT比率(ihMTR)地图揭示了髓鞘化胼胝体在颤抖小鼠大脑,而传统的MT比率(MTR)地图显示没有明确的对比。与对照组相比,颤抖小鼠胼胝体的ihMTR值降低了约40%,但仍显著高于皮质的ihMTR值。这一发现进一步证实了ihMT的高髓鞘特异性,并建议将其用作检测早期髓鞘形成或髓鞘修复的标志物。
Inhomogeneous magnetization transfer (ihMT) MRI is uniquely sensitive to myelin with lipids as a primary source of its contrast. In this study, we investigated whether ihMT can detect white matter structures in the hypomyelinated shiverer mouse brain, a model of dysmyelination. Conventional MT and ihMT images were acquired from ex vivo Rag2−/− control and shiverer mouse brains at 7 Tesla using previously reported optimized saturation parameters. ihMT ratio (ihMTR) maps revealed hypomyelinated corpus callosum in the shiverer mouse brain, whereas conventional MT ratio (MTR) maps showed no clear contrast. The ihMTR values of the corpus callosum in the shiverer mice were reduced by approximately 40% compared to controls, but remained significantly higher than the ihMTR values of the cortex. The finding further confirms ihMT’s high myelin specificity and suggests its use as a marker to detect early myelination or myelin repair.
与髓磷脂生物发生有关的少突胶质膜动力学。
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