Intravenous delivery of targeted liposomes to amyloid-β pathology in APP/PSEN1 transgenic mice.

Intravenous delivery of targeted liposomes to amyloid-β pathology in APP/PSEN1 transgenic mice.
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静脉内递送靶向脂质体以治疗 APP/PSEN1 转基因小鼠的淀粉样蛋白-β 病理学。

DOI:
10.1371/journal.pone.0048515
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发表时间:
2012
期刊:
影响因子:
3.7
通讯作者:
Annapragada A
Annapragada A
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Tanifum EA;Dasgupta I;Srivastava M;Bhavane RC;Sun L;Berridge J;Pourgarzham H;Kamath R;Espinosa G;Cook SC;Eriksen JL;Annapragada A

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细胞外淀粉样蛋白-β (Aβ) 斑块和细胞内神经原纤维缠结构成了阿尔茨海默病 (AD) 的主要神经病理学标志。现在很明显,实质 Aβ 斑块沉积先于疾病的行为症状数年。开发能够靶向这些斑块的药物可能可用作诊断或治疗工具。在这项研究中,我们合成了一种 Aβ 靶向脂质缀合物,将其掺入隐形脂质体纳米颗粒中,并在 AD 小鼠模型中测试了它们结合淀粉样蛋白斑沉积物的能力。结果表明,与游离配体相比,这些颗粒保持了与合成 Aβ 聚集体的结合特征,并高效地选择性结合 AD 小鼠模型(APP/PSEN1 转基因小鼠)脑组织切片中的 Aβ 斑块沉积物。当静脉注射时,这些长循环纳米颗粒似乎会穿过血脑屏障并与 Aβ 斑块沉积物结合,标记脑淀粉样血管病的实质淀粉样沉积物和血管淀粉样蛋白特征。
Extracellular amyloid-β (Aβ) plaques and intracellular neurofibrillary tangles constitute the major neuropathological hallmarks of Alzheimer’s disease (AD). It is now apparent that parenchymal Aβ plaque deposition precedes behavioral signs of disease by several years. The development of agents that can target these plaques may be useful as diagnostic or therapeutic tools. In this study, we synthesized an Aβ-targeted lipid conjugate, incorporated it in stealth liposomal nanoparticles and tested their ability to bind amyloid plaque deposits in an AD mouse model. The results show that the particles maintain binding profiles to synthetic Aβ aggregates comparable to the free ligand, and selectively bind Aβ plaque deposits in brain tissue sections of an AD mouse model (APP/PSEN1 transgenic mice) with high efficiency. When administered intravenously, these long circulating nanoparticles appear to cross the blood-brain barrier and bind to Aβ plaque deposits, labeling parenchymal amyloid deposits and vascular amyloid characteristic of cerebral amyloid angiopathy.
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