High
By contrast, the parenchyma of the CNS is devoid of lymphatic vasculature2; in the brain, removal of cellular debris and toxic molecules, such as amyloid-β peptides, is mediated by a combination of transcellular transport mechanisms across the blood−brain and blood−cerebrospinal fluid (CSF) barriers7–9, phagocytosis and digestion by resident microglia and recruited monocytes and/or macrophages10,11, as well as CSF influx and ISF efflux through a paravascular (glymphatic) route12–14 PubMed:30046111
Analysis of lymphoid and myeloid cell populations in the meninges (Extended Data Fig. 9d) demonstrated a significant increase in the number of macrophages upon lymphatic ablation compared to both control groups (Extended Data Fig. 9e), which might be correlated with increased amyloid-β deposition and inflammation in the meninges PubMed:30046111
Macrophages in the dura of cases with Alzheimer’s disease were also found in close proximity to amyloid-β deposits (Fig. 3l) PubMed:30046111
The use of this method resulted in effective ablation of meningeal lymphatic vessels (Fig. 1b, c), without any detectable off-target effects in the coverage of meningeal blood vasculature seven days after the procedure (Fig. 1d) PubMed:30046111
A significant reduction in OVA-A647 drainage was observed in the visudyne with photoconversion group compared to the control groups (Extended Data Fig. 1b) PubMed:30046111
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If you find BEL Commons useful in your work, please consider citing: Hoyt, C. T., Domingo-Fernández, D., & Hofmann-Apitius, M. (2018). BEL Commons: an environment for exploration and analysis of networks encoded in Biological Expression Language. Database, 2018(3), 1–11.