Glioblastoma cells vampirize WNT from neurons and trigger a JNK/MMP signaling loop that enhances glioblastoma progression and neurodegeneration
Glioblastoma (GB) is the most lethal brain tumor, and Wingless (Wg)-related integration site (WNT) pathway activation in these tumors is associated with a poor prognosis. Clinically, the disease is characterized by progressive neurological deficits. However, whether these symptoms result from direct...
Gespeichert in:
| Hauptverfasser: | , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
December 17, 2019
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| In: |
PLoS biology
Year: 2019, Jahrgang: 17, Heft: 12 |
| ISSN: | 1545-7885 |
| DOI: | 10.1371/journal.pbio.3000545 |
| Online-Zugang: | Verlag, Volltext: https://doi.org/10.1371/journal.pbio.3000545 Verlag, Volltext: https://journals.plos.org/plosbiology/article?id=10.1371/journal.pbio.3000545 
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| Verfasserangaben: | Marta Portela, Varun Venkataramani, Natasha Fahey-Lozano, Esther Seco, Maria Losada-Perez, Frank Winkler, Sergio Casas-Tintó |
MARC
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| 245 | 1 | 0 | |a Glioblastoma cells vampirize WNT from neurons and trigger a JNK/MMP signaling loop that enhances glioblastoma progression and neurodegeneration |c Marta Portela, Varun Venkataramani, Natasha Fahey-Lozano, Esther Seco, Maria Losada-Perez, Frank Winkler, Sergio Casas-Tintó |
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| 520 | |a Glioblastoma (GB) is the most lethal brain tumor, and Wingless (Wg)-related integration site (WNT) pathway activation in these tumors is associated with a poor prognosis. Clinically, the disease is characterized by progressive neurological deficits. However, whether these symptoms result from direct or indirect damage to neurons is still unresolved. Using Drosophila and primary xenografts as models of human GB, we describe, here, a mechanism that leads to activation of WNT signaling (Wg in Drosophila) in tumor cells. GB cells display a network of tumor microtubes (TMs) that enwrap neurons, accumulate Wg receptor Frizzled1 (Fz1), and, thereby, deplete Wg from neurons, causing neurodegeneration. We have defined this process as “vampirization.” Furthermore, GB cells establish a positive feedback loop to promote their expansion, in which the Wg pathway activates cJun N-terminal kinase (JNK) in GB cells, and, in turn, JNK signaling leads to the post-transcriptional up-regulation and accumulation of matrix metalloproteinases (MMPs), which facilitate TMs’ infiltration throughout the brain, TMs’ network expansion, and further Wg depletion from neurons. Consequently, GB cells proliferate because of the activation of the Wg signaling target, β-catenin, and neurons degenerate because of Wg signaling extinction. Our findings reveal a molecular mechanism for TM production, infiltration, and maintenance that can explain both neuron-dependent tumor progression and also the neural decay associated with GB. | ||
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