{"id":85743,"date":"2025-05-08T22:28:09","date_gmt":"2025-05-08T22:28:09","guid":{"rendered":"https:\/\/www.europesays.com\/uk\/85743\/"},"modified":"2025-05-08T22:28:09","modified_gmt":"2025-05-08T22:28:09","slug":"how-brain-signals-shape-its-protective-waste-disposal-network","status":"publish","type":"post","link":"https:\/\/www.europesays.com\/uk\/85743\/","title":{"rendered":"How Brain Signals Shape Its Protective Waste Disposal Network"},"content":{"rendered":"<p><strong>Summary: <\/strong>The brain\u2019s meningeal lymphatic system plays a key role in clearing waste and transporting immune cells, but until now, how it develops was unclear. Using zebrafish and advanced imaging, researchers revealed that neural activity regulates this system by influencing specialized glial cells that release Vegfc, a key growth factor.<\/p>\n<p>These glial cells, along with fibroblasts that help process Vegfc, guide the formation and precise placement of lymphatic vessels, ensuring they remain confined to the meninges. This neural-glia-fibroblast interaction prevents harmful immune invasion into brain tissue, showcasing the brain\u2019s ability to coordinate its own microenvironment.<\/p>\n<p><strong>Key Facts<\/strong><\/p>\n<ul class=\"wp-block-list\">\n<li><strong>Neural Activity Drives Development:<\/strong> Increased neural activity boosts brain meningeal lymphatic development through Vegfc-expressing glial cells.<\/li>\n<li><strong>Glia-Fibroblast Cooperation:<\/strong> Vegfc must be processed by fibroblasts to guide lymphatic vessel growth precisely at the brain surface.<\/li>\n<li><strong>Protective Barrier:<\/strong> This regulatory axis ensures lymphatic vessels do not invade the brain parenchyma, preventing immune disruptions.<\/li>\n<\/ul>\n<p><strong>Source: <\/strong>Chinese Academy of Science<\/p>\n<p><strong>Over the past decade, intensive studies have shown that the brain\u2019s meningeal lymphatic system acts as the brain\u2019s \u201cwaste disposal network,\u201d maintaining homeostasis by clearing metabolic waste and transporting immune cells. <\/strong><\/p>\n<p>However, the mechanism underlying its developmental regulation remains unknown. How does this intricate system form, and which cells or signals govern its specific spatial arrangement in the meninges?<\/p>\n<p>  <img fetchpriority=\"high\" decoding=\"async\" width=\"1200\" height=\"799\" src=\"https:\/\/www.europesays.com\/uk\/wp-content\/uploads\/2025\/05\/glymphatic-system-brain-network-neuroscience.jpg\" alt=\"This shows a brain.\"  \/> The study shows that the brain acts as a coordinator of its microenvironment, and reveals a novel neural-glia-fibroblast-lymphatic regulatory axis. Credit: Neuroscience News<\/p>\n<p>A study\u00a0published\u00a0in\u00a0Cell\u00a0and led by Dr. Du Jiulin\u2019s lab at the Institute of Neuroscience, Center for Excellence in Brain Science and Intelligence Technology of the Chinese Academy of Sciences has uncovered the core regulatory mechanism of brain meningeal lymphatic system development.<\/p>\n<p>Taking advantage of in vivo long-term imaging in zebrafish, in combination with genetic manipulations and\u00a0neural activity\u00a0studies, researchers found that increasing neural activity\u2014for example, visual stimulation\u2014significantly enhances the development of mural lymphatic endothelial cells (muLECs) in the leptomeninges, while inhibiting neural activity\u2014for example, visual deprivation\u2014leads to a significant reduction in the muLEC number.<\/p>\n<p>Focusing on Vegfc, a key factor necessary for lymphatic system development, researchers identified a specific glial subpopulation\u2014slc6a11b+ RAs\u2014that expresses Vegfc.<\/p>\n<p>These cells extend fibers to the brain surface, making them the main source of Vegfc in the brain. Deletion of slc6a11b+ RAs impaired muLEC development, while upregulating these cells\u2019 Vegfc signaling enhanced muLEC\u00a0development.<\/p>\n<p>Moreover, researchers found that the activity of slc6a11b+ RAs and their Vegfc expression levels are positively regulated by neural activity. They found that the precursor Vegfc (pro-Vegfc) secreted by slc6a11b+ RAs requires the cooperation of ccbe1+ fibroblasts to be converted into its mature form (mVegfc).<\/p>\n<p>This cross-tissue collaboration precisely restricted the distribution of mVegfc to the brain-meningeal interface, ensuring that lymphatic endothelial cells were confined to the brain surface, preventing their invasion into the brain parenchyma, which could cause immune disruptions.<\/p>\n<p>The study shows that the brain acts as a coordinator of its microenvironment, and reveals a novel neural-glia-fibroblast-lymphatic regulatory axis. This provides a new framework for understanding how the brain adapts its lymphatic network based on functional needs, and explains why the brain\u2019s meningeal lymphatic system remains confined to the meninges, avoiding invasion of the brain parenchyma.<\/p>\n<p>In the future, intervening in this regulatory network may offer new perspectives on the role of the meningeal lymphatic system in\u00a0neurological diseases\u00a0and developing treatments.<\/p>\n<p>About this neuroscience research news<\/p>\n<p class=\"has-background\" style=\"background-color:#ffffe8\"><strong>Author: <\/strong><a href=\"https:\/\/english.cas.cn\/\" target=\"_blank\" rel=\"noreferrer noopener\">Liu Jia<\/a><br \/><strong>Source: <\/strong><a href=\"https:\/\/english.cas.cn\/\" target=\"_blank\" rel=\"noreferrer noopener\">Chinese Academy of Science<\/a><br \/><strong>Contact: <\/strong>Liu Jia \u2013 Chinese Academy of Science<br \/><strong>Image: <\/strong>The image is credited to Neuroscience News<\/p>\n<p class=\"has-background\" style=\"background-color:#ffffe8\"><strong>Original Research: <\/strong>Open access.<br \/>\u201c<a href=\"https:\/\/dx.doi.org\/10.1016\/j.cell.2025.04.008\" target=\"_blank\" rel=\"noreferrer noopener\">Neural-activity-regulated and glia-mediated control of brain lymphatic development<\/a>\u201d by Du Jiulin et al. Cell<\/p>\n<p><strong>Abstract<\/strong><\/p>\n<p><strong>Neural-activity-regulated and glia-mediated control of brain lymphatic development<\/strong><\/p>\n<p>The nervous system regulates peripheral immune responses under physiological and pathological conditions, but the brain\u2019s impact on immune system development remains unknown.<\/p>\n<p>Meningeal mural lymphatic endothelial cells (muLECs), embedded in the leptomeninges, form an immune niche surrounding the brain that contributes to brain immunosurveillance.<\/p>\n<p>Here, we report that the brain controls the development of muLECs via a specialized glial subpopulation,\u00a0slc6a11b+\u00a0radial astrocytes (RAs), a process modulated by neural activity in zebrafish.\u00a0<\/p>\n<p>slc6a11b+\u00a0RAs, with processes extending to the meninges, govern muLEC formation by expressing vascular endothelial growth factor C (vegfc). Moreover, neural activity regulates muLEC development, and this regulation requires Vegfc in\u00a0slc6a11b+\u00a0RAs.<\/p>\n<p>Intriguingly,\u00a0slc6a11b+\u00a0RAs cooperate with calcium-binding EGF domain 1 (ccbe1)+ fibroblasts to restrict muLEC growth on the brain surface via controlling mature Vegfc distribution.<\/p>\n<p>Thus, our study uncovers a glia-mediated and neural-activity-regulated control of brain lymphatic development and highlights the importance of inter-tissue cellular cooperation in development.<\/p>\n","protected":false},"excerpt":{"rendered":"Summary: The brain\u2019s meningeal lymphatic system plays a key role in clearing waste and transporting immune cells, but&hellip;\n","protected":false},"author":2,"featured_media":85744,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11],"tags":[215,1695,41262,41263,105,2667,219,220,16,15],"class_list":{"0":"post-85743","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-health","8":"tag-brain-research","9":"tag-chinese-academy-of-science","10":"tag-glial-cells","11":"tag-glympthatic-system","12":"tag-health","13":"tag-immune-system","14":"tag-neurobiology","15":"tag-neuroscience","16":"tag-uk","17":"tag-united-kingdom"},"share_on_mastodon":{"url":"https:\/\/pubeurope.com\/@uk\/114474576084917781","error":""},"_links":{"self":[{"href":"https:\/\/www.europesays.com\/uk\/wp-json\/wp\/v2\/posts\/85743","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.europesays.com\/uk\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.europesays.com\/uk\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/uk\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/uk\/wp-json\/wp\/v2\/comments?post=85743"}],"version-history":[{"count":0,"href":"https:\/\/www.europesays.com\/uk\/wp-json\/wp\/v2\/posts\/85743\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/uk\/wp-json\/wp\/v2\/media\/85744"}],"wp:attachment":[{"href":"https:\/\/www.europesays.com\/uk\/wp-json\/wp\/v2\/media?parent=85743"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.europesays.com\/uk\/wp-json\/wp\/v2\/categories?post=85743"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.europesays.com\/uk\/wp-json\/wp\/v2\/tags?post=85743"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}