Arthritis Rheum:合并神经认知缺陷的SLE患儿有大脑形态学改变

2013-09-22 0906siyu dxy

研究要点: 1.该研究针对和并/不和并神经认知缺陷的SLE患儿和正常对照儿童,比较分析其大脑形态学的差异。 2.儿童起病的SLE患儿合并神经认知缺陷,与多灶性灰质和白质体积减少相关。 3.该研究采用最先进的计算机技术基于像素进行更为客观的形态学测量。 2013年8月在线发布的《关节炎与风湿病》(ARTHRITIS & RHEUMATISM)杂志上,发表了美国西北大学范伯格医学院的D

研究要点:

1.该研究针对和并/不和并神经认知缺陷的SLE患儿和正常对照儿童,比较分析其大脑形态学的差异。

2.儿童起病的SLE患儿合并神经认知缺陷,与多灶性灰质和白质体积减少相关。

3.该研究采用最先进的计算机技术基于像素进行更为客观的形态学测量。

2013年8月在线发布的《关节炎与风湿病》(ARTHRITIS & RHEUMATISM)杂志上,发表了美国西北大学范伯格医学院的Darren R. Gitelman进行的一项研究,该研究采用结构性核磁共振成像技术(MRI)来描述儿童期起病的系统性红斑狼疮(SLE)患儿和匹配正常对照儿童的灰质和白质特征性改变,旨在比较合并/不合并神经认知缺陷的儿童起病SLE患儿和正常对照儿童的大脑形态学改变,及其与病程和类固醇治疗的关系。【原文下载

21位SLE患儿和19位健康对照均接受结构性MRI检查。研究者对两组人群的灰质和白质的概率密度图进行比较分析。神经心理学测试证实8位儿童起病的SLE患儿出现神经认知缺陷。相较于正常对照和不合并神经认知缺陷的SLE患儿,合并神经认知缺陷的儿童起病SLE患儿出现大脑多个区域灰质体积减少。病程和口服/静脉使用类固醇类药物累积剂量均不能解释灰质的减少。尽管灰质和白质的减少也出现在不合并神经认知缺陷的SLE患儿,但是,此种灰质减少与病程和口服类固醇药物累积剂量相关。相反,静脉使用类固醇药物累积剂量越高,白质体积越大。

Darren R. Gitelman等认为,儿童起病的SLE患儿合并神经认知缺陷,与多灶性灰质和白质体积减少相关。由于,仅白质体积的改变与病程和口服类固醇药物累积剂量相关,这一情况可能暗示,灰质和白质的改变涉及不同潜在机制。仍需要进一步的研究来解释儿童期发病SLE患儿的灰质和白质改变的关系,该关系潜在机制是否涉及免疫、血管、或者其他原因?该种改变是否可逆?是否可以预防?静脉使用类固醇药物对维持白质体积的保护性作用仍需要大型队列研究来证实。

研究背景:

SLE是一种典型的自身免疫性疾病,以自身抗体的产生和多器官受累为特征。儿童发病的SLE占SLE患者的10%。神经系统受累及提示患者病情预后差。依据美国风湿病联盟(ACR)关于神经精神狼疮(NPSLE)的最新标准,80%的成人SLE患者可诊断为NPSLE,其中50-80%的患者出现神经认知缺陷。但是,由于医师评估的主观性,此种判定方法存在偏移,且不能对儿童发病SLE相关神经认识缺陷的特定区域受累进行定位。

近来,一些SLE研究者采用先进的计算机技术证实了神经认知缺陷相关的局灶性大脑异常,并揭示此种大脑异常改变与病程和类固醇药物相关。基于像素的形态学测量法以半自动算法计算大脑灰质和白质体积,正是上述先进技术中的一种。
该研究主要采用基于像素的形态学测量法和高分辨的结构性MRI定义灰质和白质体积特征,进而研究合并/不合并神经认知缺陷的SLE患儿与正常对照儿童之间的差异。

原文下载

Gitelman DR, Klein-Gitelman MS, Ying J, Sagcal-Gironella AC, Zelko F, Beebe DW, Difrancesco M, Parrish T, Hummel J, Beckwith T, Brunner HI.Brain morphometric changes associated with childhood-onset systemic lupus erythematosus and neurocognitive deficit.Arthritis Rheum. 2013 Aug;65(8):2190-200.

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    2013-09-24 zhaojie88
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