T1w/T2w比率表明,在患有RAS病的年轻人中,皮质内髓含量降低
Julia R Plank1, Sara K Pardej1, Mira M Raman1
1Division of Interdisciplinary Brain Sciences, Department of Psychiatry and Behavioral Sciences, Stanford University, 1520 Page Mill Road, Palo Alto, CA 94304, USA.
medRxiv : the preprint server for health sciences
|September 26, 2025
概括
T1w/T2w比率MRI在患有RASopathies的一种神经发育障碍的儿童中有效检测皮质髓减少. 较高的髓含量与更好的身体健康相关,这表明髓是潜在的治疗点.
科学领域:
- 神经成像是一种神经成像.
- 神经发育障碍 神经发育障碍
- 骨髓成像 骨髓成像
背景情况:
- 髓是神经发育障碍的潜在治疗点.
- 需要一种可靠的体内方法来评估髓变化.
- T1加权 (T1w) /T2加权 (T2w) 的MRI比率为皮质髓的估计提供了一个有希望的估计.
研究的目的:
- 为了研究T1w/T2w比率的实用性,用于测量RASopathies的儿童皮质髓质蛋白.
- 评估RASopathies和典型发育儿童之间的T1w/T2w比率的差异.
主要方法:
- 112名儿童 (86名患有RAS病,26名典型发育) 接受了T1w和T2wMRI.
- 计算T1w/T2w比率图,并从皮质和皮质下区域提取值.
- 使用ANCOVA与FDR校正分析了群体差异;探索性分析检查了认知和健康评分.
主要成果:
- 在RASopathies组中观察到T1w/T2w比率的广泛降低,表明皮质髓的减少.
- 68个皮层区域中的63个和accumbens在RASopathies中显著降低了T1w/T2w比率.
- 较高的T1w/T2w比率与更好的机动性和强度冲击等级相关.
结论:
- T1w/T2w比率映射是一种敏感的工具,用于检测RASopathies中的皮质髓蛋白变化.
- 皮质髓含量可能与身体流动性和耐力有关.
- 进一步的研究应该探索T1w/T2w比率作为治疗干预的生物标志物.
相关概念视频
01:19The Effect of Aging on Tissues
Several body functions deteriorate with age. The external signs of aging are easily identifiable. For example, the skin becomes dry, less elastic, and thins out, forming wrinkles. The skin of the face begins to appear looser due to a decrease in the levels of elastic and collagen fibers in the connective tissue. Additionally, melanin production in the hair follicle decreases with age, resulting in gray hair. Moreover, the senses of sight and hearing decline, so glasses and hearing aids may...
01:24T Cell Types and Functions
When T cells with CD4 markers are activated, they give rise to two types of effector cells: helper T cells and regulatory T cells. Meanwhile, T cells with CD8 markers differentiate into effector cytotoxic T cells. The differentiation of CD4 T cells into helper T cell subsets, such as Th1, Th2, and Th17 cells, is dependent on the antigen type, antigen-presenting cell, and regulatory cytokines.
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...