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Dynamic changes of CSF sPDGFRβ during ageing and AD progression and associations with CSF ATN biomarkers
Molecular Neurodegeneration ( IF 15.1 ) Pub Date : 2022-01-15 , DOI: 10.1186/s13024-021-00512-w
Jun Wang 1, 2 , Dong-Yu Fan 1, 2, 3 , Hui-Yun Li 1, 2 , Chen-Yang He 1, 2 , Ying-Ying Shen 1, 2 , Gui-Hua Zeng 1, 2 , Dong-Wan Chen 1, 2 , Xu Yi 1, 2 , Ya-Hui Ma 4 , Jin-Tai Yu 5 , Yan-Jiang Wang 1, 2, 6, 7
Affiliation  

Loss of brain capillary pericyte is involved in the pathologies and cognitive deficits in Alzheimer’s disease (AD). The role of pericyte in early stage of AD pathogenesis remains unclear. We investigated the dynamic changes of soluble platelet-derived growth factor receptor β (sPDGFRβ) in cerebrospinal fluid (CSF), a marker of brain pericyte injury, in transition from normal ageing to early AD in a cognitively unimpaired population aged 20 to 90 years. Association between sPDGFRβ and ATN biomarkers were analyzed. In lifetime, CSF sPDGFRβ continually increased since age of 20 years, followed by the increases of phosphorylated tau-181 (P-tau181) and total tau (T-tau) at the age of 22.2 years and 31.7 years, respectively; CSF Aβ42 began to decline since the age of 39.6 years, indicating Aβ deposition. The natural trajectories of biomarkers suggest that pericyte injury is an early event during transition from normal status to AD, even earlier than Aβ deposition. In AD spectrum, CSF sPDGFRβ was elevated in preclinical stage 2 and participants with suspected non-AD pathophysiologies. Additionally, CSF sPDGFRβ was positively associated with P-tau181 and T-tau independently of Aβ42, and significantly strengthened the effects of Aβ42 on P-tau181, suggesting that pericyte injury accelerates Aβ-mediated tau hyperphosphorylation. Our results suggest that pericyte injury contributes to AD progression in the early stage in an Aβ-independent pathway. Recovery of pericyte function would be a target for prevention and early intervention of AD.

中文翻译:

CSF sPDGFRβ 在衰老和 AD 进展过程中的动态变化以及与 CSF ATN 生物标志物的关联

脑毛细血管周细胞的丧失与阿尔茨海默病 (AD) 的病理和认知缺陷有关。周细胞在 AD 发病机制早期的作用仍不清楚。我们调查了脑脊液 (CSF) 中可溶性血小板衍生生长因子受体 β (sPDGFRβ) 的动态变化,脑脊液 (CSF) 是脑周细胞损伤的标志物,在 20 至 90 岁的认知未受损人群中,从正常衰老过渡到早期 AD。分析了 sPDGFRβ 和 ATN 生物标志物之间的关联。一生中,CSF sPDGFRβ自20岁起持续升高,其次是磷酸化tau-181(P-tau181)和总tau(T-tau)分别在22.2岁和31.7岁增加;CSF Aβ42 从 39.6 岁开始下降,表明 Aβ 沉积。生物标志物的自然轨迹表明,周细胞损伤是从正常状态过渡到 AD 的早期事件,甚至早于 Aβ 沉积。在 AD 谱系中,CSF sPDGFRβ 在临床前 2 期和疑似非 AD 病理生理学的参与者中升高。此外,CSF sPDGFRβ 与 P-tau181 和 T-tau 呈正相关,独立于 Aβ42,并显着增强了 Aβ42 对 P-tau181 的影响,表明周细胞损伤加速了 Aβ 介导的 tau 过度磷酸化。我们的结果表明,周细胞损伤在 Aβ 非依赖性途径的早期有助于 AD 进展。周细胞功能的恢复将是AD预防和早期干预的目标。在 AD 谱系中,CSF sPDGFRβ 在临床前 2 期和疑似非 AD 病理生理学的参与者中升高。此外,CSF sPDGFRβ 与 P-tau181 和 T-tau 呈正相关,独立于 Aβ42,并显着增强了 Aβ42 对 P-tau181 的影响,表明周细胞损伤加速了 Aβ 介导的 tau 过度磷酸化。我们的结果表明,周细胞损伤在 Aβ 非依赖性途径的早期有助于 AD 进展。周细胞功能的恢复将是AD预防和早期干预的目标。在 AD 谱系中,CSF sPDGFRβ 在临床前 2 期和疑似非 AD 病理生理学的参与者中升高。此外,CSF sPDGFRβ 与 P-tau181 和 T-tau 呈正相关,独立于 Aβ42,并显着增强了 Aβ42 对 P-tau181 的影响,表明周细胞损伤加速了 Aβ 介导的 tau 过度磷酸化。我们的结果表明,周细胞损伤在 Aβ 非依赖性途径的早期有助于 AD 进展。周细胞功能的恢复将是AD预防和早期干预的目标。表明周细胞损伤加速了 Aβ 介导的 tau 过度磷酸化。我们的结果表明,周细胞损伤在 Aβ 非依赖性途径的早期有助于 AD 进展。周细胞功能的恢复将是AD预防和早期干预的目标。表明周细胞损伤加速了 Aβ 介导的 tau 过度磷酸化。我们的结果表明,周细胞损伤在 Aβ 非依赖性途径的早期有助于 AD 进展。周细胞功能的恢复将是AD预防和早期干预的目标。
更新日期:2022-01-16
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