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Article Dans Une Revue Nature Cell Biology Année : 2022

Alternative RNA splicing modulates ribosomal composition and determines the spatial phenotype of glioblastoma cells

Soniya Bastola
  • Fonction : Auteur
Tatiana Aksinina
Ksenia Anufrieva
  • Fonction : Auteur
Jia Wang
Victoria Shender
Dmitriy Andreev
Tatiana Kovalenko
  • Fonction : Auteur
Georgij Arapidi
  • Fonction : Auteur
Polina Shnaider
  • Fonction : Auteur
Anastasia Kazakova
  • Fonction : Auteur
Yaroslav Latyshev
  • Fonction : Auteur
Victor Tatarskiy
  • Fonction : Auteur
Alexander Shtil
  • Fonction : Auteur
Chaoxi Li
  • Fonction : Auteur
Yichan Wang
  • Fonction : Auteur
Maria Rubtsova
  • Fonction : Auteur
Olga Dontsova
  • Fonction : Auteur
Michael Condro
  • Fonction : Auteur
Benjamin Ellingson
  • Fonction : Auteur
Mikhail Shakhparonov
  • Fonction : Auteur
Harley Kornblum
Ichiro Nakano
Marat Pavlyukov

Résumé

Glioblastoma (GBM) is characterized by exceptionally high intratumoral heterogeneity. However, the molecular mechanisms underlying the origin of different GBM cell populations remain unclear. Here, we found that the compositions of ribosomes of GBM cells in the tumour core and edge differ due to alternative RNA splicing. The acidic pH in the core switches before messenger RNA splicing of the ribosomal gene RPL22L1 towards the RPL22L1b isoform. This allows cells to survive acidosis, increases stemness and correlates with worse patient outcome. Mechanistically, RPL22L1b promotes RNA splicing by interacting with lncMALAT1 in the nucleus and inducing its degradation. Contrarily, in the tumour edge region, RPL22L1a interacts with ribosomes in the cytoplasm and upregulates the translation of multiple messenger RNAs including TP53. We found that the RPL22L1 isoform switch is regulated by SRSF4 and identified a compound that inhibits this process and decreases tumour growth. These findings demonstrate how distinct GBM cell populations arise during tumour growth. Targeting this mechanism may decrease GBM heterogeneity and facilitate therapy.

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Chimie
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Dates et versions

hal-03872196 , version 1 (25-11-2022)

Identifiants

Citer

Tatyana Larionova, Soniya Bastola, Tatiana Aksinina, Ksenia Anufrieva, Jia Wang, et al.. Alternative RNA splicing modulates ribosomal composition and determines the spatial phenotype of glioblastoma cells. Nature Cell Biology, 2022, 24 (10), pp.1541-1557. ⟨10.1038/s41556-022-00994-w⟩. ⟨hal-03872196⟩
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