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学科主题: 放射科学
题名:
磁共振示踪法定量测量大鼠 C6胶质瘤模型细胞外间隙扩散参数
其他题名: Extracellular space diffusion during progression of rat C6 glioma quantificated by magnetic resonance imaging
作者: 左龙; 赵越; 李怀业; 李凯; 卢嘉宾; 韩鸿宾
关键词: 磁共振成像 ; 细胞外间隙 ; C6胶质瘤模型 ; Magnetic resonance imaging,Extracellular space,C6 glioma model ; Rats
刊名: 中国比较医学杂志
发表日期: 2014
DOI: 10.3969/j.issn.1671.7856.2014.012.001
期: 12, 页:1-7
收录类别: 中国科技核心期刊
文章类型: Journal Article
摘要: 目的:应用磁共振示踪技术定量比较了不同时期的大鼠C6胶质瘤的细胞外间隙扩散参数。并对影响细胞外间隙扩散的细胞外基质成分进行了分析。方法将示踪剂钆喷酸葡胺( gadolinium-diethylene triamine pentaacetic acid,Gd-DTPA)作为示踪剂导入大鼠脑细胞外间隙内,采用磁共振示踪法动态监测示踪剂在大鼠脑内的扩散与清除,利用已建立的数学模型,计算有效扩散系数(D*),清除速率常数(k’)和半衰期(thalf-life)。对细胞外基质的主要成分,如硫酸软骨素蛋白多糖( CSPGs)、腱生蛋白C、胶原蛋白IV型进行免疫组化和蛋白质印记分析。结果与10 d C6胶质瘤相比,20 d胶质瘤有效扩散系数((6.67±1.78)×10-5 mm2/s vs.(1.26±0.27)×10-4 mm2/s;t=4.265;P<0.01)及清除速率常数((7.67±2.29)×10-5mm2/s)vs.(1.46±0.36)×10-4mm2/s);t=3.87;P<0.05)减小,迂曲度增大((3.99±0.57) vs.(2.83±0.29);t=4.11;P<0.01)),半衰期延长((0.86±0.23 h)vs.(1.64±0.12 h);(t =5.91; P<0.01))。20 d胶质瘤的细胞外基质的硫酸软骨素蛋白糖((0.48±0.07)vs.(0.32±0.09);t=4.663;p<0.01)、腱生蛋白-C(0.29±0.04)vs.(0.58±0.11);t=6.50;P<0.01)和胶原蛋白IV型(0.24±0.07)vs.(0.33±0.06);t=3.81;P<0.05)的含量较10 d胶质瘤明显增加。结论随C6胶质瘤进展,细胞间隙扩散参数发生变化;细胞外基质的含量影响细胞外间隙扩散;我们相信本研究有助于我们更好地认识神经胶质瘤微环境,并将为经间质途径治疗神经胶质瘤提供参考。 Objective To compare the extracellular space diffusion at different stages of rat C6-gliomas determined by MRI tracer method and analyze the influencing effect of extracellular matrix ( ECM) on the diffusion process.Methods Introducing adolinium-diethylene triaminepentaacetic acid ( Gd-DTPA) into extracellular space ( ECS) as a tracer.The diffusion parameters and half-life time were quantified according to mathematical model of diffusion.The main ECM components ( e.g. chordroitin sulfate proteoglycans ( CSPGs ) , collagen IV tenascin C ) were detected by immunohistochemical and immunoblot analysis.Results Gd-DTPA introduced into 20-day glioma in the rats diffused more slowly [(6.67 ±1.78) ×10 -5 mm2/s vs.(1.26 ±0.27) ×10-4 mm2/s; t =4.265; P<0.01)], deriving a larger tortuosity [(3.99 ±0.57) vs.(2.83 ±0.29);t=4.11;P<0.01)], localized within the tumor with a smaller clearance rate [(7.67 ±2.29) ×10 -5mm2/s)vs.(1.46 ±0.36) ×10 -4mm2/s);t=3.87;P<0.05), and a longer half-life time ((0.86 ±0.23 h)vs.(1.64 ±0.12 h);(t=5.91;p<0.01)] compared with 10-day gliomas in the rats.The increased levels of extracellular matrix of glioma were associated with different diffusion and clearance parameters of 20-day gliomas in the rats in comparision with those in the 10-day rat gliomas, in which the chordroitin sulfate proteoglycans[(0.48 ±0.07) vs.(0.32 ±0.09);t=4.663;P<0.01)], tenascin C [(0.29 ±0.04) vs.(0.58 ±0.11);t =6.50;P<0.01] and collagen IV [(0.24 ±0.07)vs.(0.33 ±0.06);t=3.81;P<0.05] were tested.Conclusions The ECS parameters are changed with the C6 glioma progression due to the increased ECM content.The results of our study may help us to better understanding the glioma micro-environment and provide beneficial references for the brain interstitial drug delivery to treat gliomas.
语种: 中文
原文出处: 查看原文
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内容类型: 期刊论文
URI标识: http://ir.bjmu.edu.cn/handle/400002259/69430
Appears in Collections:北京大学第三临床医学院_放射科_期刊论文

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作者单位: 1.北京大学第三医院放射科,北京 100191
2.磁共振装备与技术北京市重点实验室,北京 100191
3.大连大学化学与化学工程学院,大连,116622
4.北京积水潭医院放射科,北京,100035

Recommended Citation:
左龙,赵越,李怀业,等. 磁共振示踪法定量测量大鼠 C6胶质瘤模型细胞外间隙扩散参数[J]. 中国比较医学杂志,2014(12):1-7.
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