Microglia/macrophage-derived human CCL18 promotes glioma progression via CCR8-ACP5 axis analyzed in humanized slice model.

Cell Rep

Cellular Neuroscience, Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association, Robert Roessle Strasse 10, 13125 Berlin, Germany; Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China. Electronic address:

Published: April 2022

AI Article Synopsis

  • Researchers found that a substance called CCL18 from special brain cells called GAMs helps glioblastoma multiforme (a type of brain cancer) to grow and spread.
  • They created a way to study CCL18 using human brain cells in mice to see how it works, since it’s not found in mouse cells.
  • They discovered that CCL18 helps glioma cells grow by using a specific receptor (CCR8) and acts through another molecule (ACP5) to cause this growth.

Article Abstract

Factors released from glioma-associated microglia/macrophages (GAMs) play a crucial role in glioblastoma multiforme (GBM) progression. Here, we study the importance of CCL18, a cytokine expressed in human but not in rodent GAMs, as a modulator of glioma growth. Since CCL18 signaling could not be studied in classical mouse glioma models, we developed an approach by transplanting induced pluripotent stem cell-derived human microglia and human glioma cells into mouse brain slices depleted of their intrinsic microglia. We observe that CCL18 promotes glioma cell growth and invasion. Chemokine (C-C motif) receptor 8 (CCR8) is identified as a functional receptor for CCL18 on glioma cells, and ACP5 (acid phosphatase 5) is revealed as an important part of the downstream signaling cascade for mediating glioma growth. We conclude, based on the results from an in vitro, ex vivo humanized glioma model and an in vivo GBM model that microglia/macrophage-derived CCL18 promotes glioma growth.

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Source
http://dx.doi.org/10.1016/j.celrep.2022.110670DOI Listing

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