CD4 T細胞輔助小膠質細胞成熟
作者:
小柯機器人發布時間:2020/7/24 15:01:15
比利時魯汶大學Adrian Liston研究團隊發現,CD4 T細胞輔助小膠質細胞成熟。2020年7月22日,《細胞》在線發表了這一成果。
研究人員聯合使用成像、單細胞和手術方法來鑑定了小鼠和人腦中的CD69+CD4 T細胞群,這不同於循環的CD4 T細胞。駐留在大腦中的群體是通過活化的循環細胞從原位分化而來的,並由自身抗原和外周微生物組形成。
單細胞測序顯示,在沒有小鼠CD4 T細胞的情況下,常駐小膠質細胞仍然游離在胎兒和成年狀態之間。這種成熟缺陷導致過度的未成熟神經元突觸和行為異常。這些結果闡明了CD4 T細胞在大腦發育中的作用以及免疫和神經系統進化之間的潛在聯繫。
據了解,大腦是相對免疫豁免的場所。儘管人們已經在中樞神經系統中發現了CD4 T細胞,但它們在健康大腦中的存在仍存在爭議,並且其功能在很大程度上仍然未知。
附:英文原文
Title: Microglia Require CD4 T Cells to Complete the Fetal-to-Adult Transition
Author: Emanuela Pasciuto, Oliver T. Burton, Carlos P. Roca, Vasiliki Lagou, Wenson D. Rajan, Tom Theys, Renzo Mancuso, Raul Y. Tito, Lubna Kouser, Zsuzsanna Callaerts-Vegh, Alerie G. de la Fuente, Teresa Prezzemolo, Loriana G. Mascali, Aleksandra Brajic, Carly E. Whyte, Lidia Yshii, Anna Martinez-Muriana, Michelle Naughton, Andrew Young, Alena Moudra, Pierre Lemaitre, Suresh Poovathingal, Jeroen Raes, Bart De Strooper, Denise C. Fitzgerald, James Dooley, Adrian Liston
Issue&Volume: 2020-07-22
Abstract: The brain is a site of relative immune privilege. Although CD4 T cells have been reported in the central nervous system, their presence in the healthy brain remains controversial, and their function remains largely unknown. We used a combination of imaging, single cell, and surgical approaches to identify a CD69+ CD4 T cell population in both the mouse and human brain, distinct from circulating CD4 T cells. The brain-resident population was derived through in situ differentiation from activated circulatory cells and was shaped by self-antigen and the peripheral microbiome. Single-cell sequencing revealed that in the absence of murine CD4 T cells, resident microglia remained suspended between the fetal and adult states. This maturation defect resulted in excess immature neuronal synapses and behavioral abnormalities. These results illuminate a role for CD4 T cells in brain development and a potential interconnected dynamic between the evolution of the immunological and neurological systems.
DOI: 10.1016/j.cell.2020.06.026
Source: https://www.cell.com/cell/fulltext/S0092-8674(20)30758-3
Cell:《細胞》,創刊於1974年。隸屬於細胞出版社,最新IF:36.216