Diabetes Care:胰岛素抵抗或致老年痴呆灰质萎缩和认知障碍

2012-11-01 Diabetes Care Diabetes Care

  来自美国威斯康辛大学的一项前瞻性研究表明,晚期中年人群的胰岛素抵抗与早期阿尔茨海默病导致的进行性灰质萎缩显著相关。胰岛素抵抗也可能通过负性影响内侧颞叶的灰质体积,而影响患者编码片段信息的能力。研究在2012年10月15日在线发表于《糖尿病护理》(Diabetes Care)杂志。   胰岛素抵抗可导致受阿尔茨海默病影响大脑区域的葡萄糖摄取和其他功能失调。因此,胰岛素抵抗可能在阿尔茨

  来自美国威斯康辛大学的一项前瞻性研究表明,晚期中年人群的胰岛素抵抗与早期阿尔茨海默病导致的进行性灰质萎缩显著相关。胰岛素抵抗也可能通过负性影响内侧颞叶的灰质体积,而影响患者编码片段信息的能力。研究在2012年10月15日在线发表于《糖尿病护理》(Diabetes Care)杂志。

  胰岛素抵抗可导致受阿尔茨海默病影响大脑区域的葡萄糖摄取和其他功能失调。因此,胰岛素抵抗可能在阿尔茨海默病的发病机制中发挥作用。该纵向调查研究旨在评价中年晚期、认知功能健康人群的胰岛素抵抗是否与阿尔茨海默病敏感脑区的灰质较少和认知表现较差相关。

  研究共纳入基线372例受试者和其后〜4年一个连续子集的121例受试者。对受试者进行胰岛素抵抗,灰质体积和雷伊听觉言语学习测试(RAVLT)的稳态模型评估。分别采用基于体素和基于张量的形态计量法,测试胰岛素抵抗与基线脑容量水平和进行性灰质萎缩的相关性。

  结果显示,较高的胰岛素抵抗可预测基线和4年后较少的灰质体积,包括内侧颞叶,额叶皮质,楔前叶,和其他顶叶脑回。感兴趣区域分析,独立于基于体素分析,可证实较高的胰岛素抵抗与内侧颞叶萎缩有关。萎缩本身与RAVLT所发现的认知缺陷相对应。较高胰岛素抵抗预测的颞叶萎缩显著地导致了更差的RAVLT编码表现。

  链接:

Willette AA, Xu G, Johnson SC, Birdsill AC, Jonaitis EM, Sager MA, Hermann BP, La Rue A, Asthana S, Bendlin BB.Insulin Resistance, Brain Atrophy, and Cognitive Performance in Late Middle-Aged Adults.Diabetes Care. 2012 Oct 15

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    2012-11-12 baoya
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    2013-08-05 chendoc252

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AIM:睡眠不足可诱发脂肪细胞胰岛素抵抗

  《内科学文献》10月16日发表的一项研究显示,睡眠剥夺可导致健康体瘦年轻成人脂肪细胞的胰岛素敏感性降低30%(Ann. Intern. Med. 2012;157:549-57)。   该研究从社区招募了7名健康的体瘦年轻成人,男性6名,女性1名,平均年龄为23.7岁(18~30岁)。所有受试者的常规睡眠时间为7.5~8.5 h/晚。对所有受试者进行夜间多导睡眠图检查,以确保他们无