Brain Pathways in LIS1-Associated Lissencephaly Revealed by Diffusion MRI Tractography.

Brain Pathways in LIS1-Associated Lissencephaly Revealed by Diffusion MRI Tractography.
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DOI:
10.3390/brainsci13121655
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发表时间:
2023-11-29
期刊:
影响因子:
3.3
通讯作者:
--
中科院分区:
医学4区
文献类型:
--
作者:

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无脑畸形(LIS)是一种罕见的神经发育障碍,严重的症状所造成的异常神经元迁移在皮层发育。它是由遗传和非遗传因素引起的。尽管对皮质的研究频繁,但对结构异常及其对白色物质的影响的全面阐明是有限的。本研究的主要目的是使用弥散MRI(dMRI)纤维束成像分析LIS1相关LIS中异常神经元迁移途径和白色纤维组织。为此目的,用3T dMRI扫描具有LIS的脑标本(n = 3)和年龄和性别匹配的对照(n = 4)的厚片。我们的高分辨率离体dMRI成功识别了样本中的常见异常。结果显示,在所有LIS标本中,放射状定向的皮质下纤维异常增加,可能与放射状迁移途径和u纤维相关,而联合纤维减少。
Lissencephaly (LIS) is a rare neurodevelopmental disorder with severe symptoms caused by abnormal neuronal migration during cortical development. It is caused by both genetic and non-genetic factors. Despite frequent studies about the cortex, comprehensive elucidation of structural abnormalities and their effects on the white matter is limited. The main objective of this study is to analyze abnormal neuronal migration pathways and white matter fiber organization in LIS1-associated LIS using diffusion MRI (dMRI) tractography. For this purpose, slabs of brain specimens with LIS (n = 3) and age and sex-matched controls (n = 4) were scanned with 3T dMRI. Our high-resolution ex vivo dMRI successfully identified common abnormalities across the samples. The results revealed an abnormal increase in radially oriented subcortical fibers likely associated with radial migration pathways and u-fibers and a decrease in association fibers in all LIS specimens.
DOI: 10.1097/01.jnen.0000182978.56612.41
发表时间: 2005-10-01
影响因子: 3.2
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