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Neurology:2型糖尿病可炎性相关脑血流量下降可能与认知功能障碍有关

2015-07-13 MedSci MedSci原创

2型糖尿病可致认知功能障碍研究人员发现,仅仅过去了2年,2型糖尿病患者调节血流量的能力便已降低,由此影响了他们的认知和行为能力。采用队列研究的方法,纳入40名研究对象,19名2型糖尿病患者及21名无糖尿病患者,平均年龄为66岁。19名2型糖尿病患者均已接受5年以上的治疗,平均治疗时间为13年。该研究中,研究人员还对研究对象进行了一系列的测试,评估了他们的认知和记忆功能,同时还使用MRI扫描成像,血


研究人员发现,仅仅过去了2年,2型糖尿病患者调节血流量的能力便已降低,由此影响了他们的认知和行为能力。

采用队列研究的方法,纳入40名研究对象,19名2型糖尿病患者及21名无糖尿病患者,平均年龄为66岁。19名2型糖尿病患者均已接受5年以上的治疗,平均治疗时间为13年。

该研究中,研究人员还对研究对象进行了一系列的测试,评估了他们的认知和记忆功能,同时还使用MRI扫描成像,血液测试以评估机体脑体积,血流量及炎症情况。2年后重复这些测量。

他们发现,2型糖尿病患者的脑血量调节能力下降了,且认知和记忆功能也较2年前较差。研究开始时血流量调节能力最差的研究对象其最基本的日常事务(如洗澡和烹饪)的执行能力下降最多。此外,研究人员发现,炎症程度最高的研究对象不论其血糖或血压是否已控制,其血流量调节能力下降的幅度也最大。

血流量的检测可预测机体的认知变化

在2年的研究过程中,与不伴有2型糖尿病的个体相比,2型糖尿病患者的学习和记忆能力明显较低。2型糖尿病患者的平均测试得分下降了12%,从46分降到41分,而不伴有2型糖尿病的研究对象其平均测试得分则稳定在55分。研究人员发现,2型糖尿病患者的血流量调节能力在过去的2年里下降了65%左右。

“早期发现并检测血流量调节能力是预测机体认知和决策能力加速变化的一个重要手段,”Dr. Novak 说道。

由于研究仅在研究开始时以及2年后研究结束时对研究对象进行了测试,因此无法得知2型糖尿病患者的认知和行为能力是如何随时间而变化的。作者也承认此为本研究的局限性,他指出需要开始另一项样本量更大,时间更久的研究,以进一步揭示血流量调节与疾病之间的时间关系。

本研究还存在其他的局限性,研究人员并没有测量其他可能导致认知受损的因素,且研究并未纳入年轻患者。

尽管存在这些局限性,作者认为他们的研究仍可为关于2型糖尿病对大脑长期影响的机制提供了临床证据,影响了老年2型糖尿病患者的卫生保健以及将来的治疗。

原始出处:

Chung CC, Pimentel D, Jor'dan AJ, Hao Y, Milberg W, Novak V.Inflammation-associated declines in cerebral vasoreactivity and cognition in type 2diabetes. Neurology. 2015 Jul 8. pii: 10.1212/WNL.0000000000001820.

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    2015-08-19 yinhl1978
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    2015-08-06 hlycom3356

    期待有更多研究

    0

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    2015-07-13 文刀

    完蛋咯

    0

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