One of the early pathological hallmarks of Alzheimer’s disease(AD) is the deposition of amyloid-β(Aβ) plaques in the brain. There has been a tremendous interest in the development of Aβ plaques imaging probes for ...One of the early pathological hallmarks of Alzheimer’s disease(AD) is the deposition of amyloid-β(Aβ) plaques in the brain. There has been a tremendous interest in the development of Aβ plaques imaging probes for early diagnosis of AD in the past decades. Optical imaging, particularly near-infrared fluorescence(NIRF) imaging, has emerged as a safe, low cost, real-time, and widely available technique, providing an attractive approach for in vivo detection of Aβ plaques among many different imaging techniques. In this review,we provide a brief overview of the state-of-the-art development of NIRF Aβ probes and their in vitro and in vivo applications with special focus on design strategies and optical, binding, and brain-kinetic properties.展开更多
目的 通过对阿尔茨海默病(Alzheimer’s disease,AD)和血管性痴呆(vascular dementia,VD)患者血液中高分子量激肽原重链蛋白(heavy chain of high molecular-weight kininogen,hc-HK)和激肽释放酶-6(kallikrein-6,KLK-6)的比较分析,从...目的 通过对阿尔茨海默病(Alzheimer’s disease,AD)和血管性痴呆(vascular dementia,VD)患者血液中高分子量激肽原重链蛋白(heavy chain of high molecular-weight kininogen,hc-HK)和激肽释放酶-6(kallikrein-6,KLK-6)的比较分析,从神经性炎症反应信号通路角度探索AD的发病机制。方法 收集AD组、VD组和对照组各15例的外周血标本,分别用蛋白质免疫印迹法检测其中hc-HK蛋白含量,用酶联免疫吸附法检测其中Aβ42和KLK-6蛋白的含量;并对Aβ42与KLK-6进行相关性分析。结果 AD患者外周血中hc-HK含量较VD组或对照组均显著增加(均P<0.01)。AD组患者血液中的KLK-6水平为(4.80±0.78)ng/mL,VD组KLK-6为(3.72±0.87)ng/mL,AD组较VD组明显增加(t=3.57,P<0.01)。AD组患者血浆中Aβ42蛋白浓度为(0.261±0.024)μg/L,与VD组或对照组比较均明显增加(均P<0.01)。通过相关分析发现,在AD组患者血液中KLK-6与Aβ42的增加呈正相关(r=0.65,P<0.01)。结论 AD患者外周血液中hc-HK和KLK-6蛋白比VD患者及非痴呆对照有明显增加,提示AD发病中有血凝接触系统的激活;激肽释放酶-激肽系统的异常激活有可能参与了AD的发病过程。展开更多
基金supported by the Fundamental Research Funds for the Central Universities and East China University of Science and Technology (start-up funds, Wei Wang)the China 111 Project (Grant B07023, Wei Wang)
文摘One of the early pathological hallmarks of Alzheimer’s disease(AD) is the deposition of amyloid-β(Aβ) plaques in the brain. There has been a tremendous interest in the development of Aβ plaques imaging probes for early diagnosis of AD in the past decades. Optical imaging, particularly near-infrared fluorescence(NIRF) imaging, has emerged as a safe, low cost, real-time, and widely available technique, providing an attractive approach for in vivo detection of Aβ plaques among many different imaging techniques. In this review,we provide a brief overview of the state-of-the-art development of NIRF Aβ probes and their in vitro and in vivo applications with special focus on design strategies and optical, binding, and brain-kinetic properties.
