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IDH1 mutations induce organelle defects via dysregulated phospholipids

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Infiltrating gliomas are devastating and incurable tumors. Amongst all gliomas, those harboring a mutation in isocitrate dehydrogenase 1 mutation (IDH1mut) acquire a different tumor biology and clinical manifestation from those that are IDH1WT. Understanding the unique metabolic profile reprogrammed...

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Main Authors: Lita, Adrian (Author) , Pliss, Artem (Author) , Kuzmin, Andrey (Author) , Yamasaki, Tomohiro (Author) , Zhang, Lumin (Author) , Dowdy, Tyrone (Author) , Burks, Christina (Author) , de Val, Natalia (Author) , Celiku, Orieta (Author) , Ruiz-Rodado, Victor (Author) , Nicoli, Elena-Raluca (Author) , Kruhlak, Michael (Author) , Andresson, Thorkell (Author) , Das, Sudipto (Author) , Yang, Chunzhang (Author) , Schmitt, Rebecca (Author) , Herold-Mende, Christel (Author) , Gilbert, Mark R. (Author) , Prasad, Paras N. (Author) , Larion, Mioara (Author)
Format: Article (Journal)
Language:English
Published: 27 January 2021
In: Nature Communications
Year: 2021, Volume: 12, Pages: 1-16
ISSN:2041-1723
DOI:10.1038/s41467-020-20752-6
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1038/s41467-020-20752-6
Verlag, lizenzpflichtig, Volltext: https://www.nature.com/articles/s41467-020-20752-6
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Author Notes:Adrian Lita, Artem Pliss, Andrey Kuzmin, Tomohiro Yamasaki, Lumin Zhang, Tyrone Dowdy, Christina Burks, Natalia de Val, Orieta Celiku, Victor Ruiz-Rodado, Elena-Raluca Nicoli, Michael Kruhlak, Thorkell Andresson, Sudipto Das, Chunzhang Yang, Rebecca Schmitt, Christel Herold-Mende, Mark R. Gilbert, Paras N. Prasad & Mioara Larion
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Summary:Infiltrating gliomas are devastating and incurable tumors. Amongst all gliomas, those harboring a mutation in isocitrate dehydrogenase 1 mutation (IDH1mut) acquire a different tumor biology and clinical manifestation from those that are IDH1WT. Understanding the unique metabolic profile reprogrammed by IDH1 mutation has the potential to identify new molecular targets for glioma therapy. Herein, we uncover increased monounsaturated fatty acids (MUFA) and their phospholipids in endoplasmic reticulum (ER), generated by IDH1 mutation, that are responsible for Golgi and ER dilation. We demonstrate a direct link between the IDH1 mutation and this organelle morphology via D-2HG-induced stearyl-CoA desaturase (SCD) overexpression, the rate-limiting enzyme in MUFA biosynthesis. Inhibition of IDH1 mutation or SCD silencing restores ER and Golgi morphology, while D-2HG and oleic acid induces morphological defects in these organelles. Moreover, addition of oleic acid, which tilts the balance towards elevated levels of MUFA, produces IDH1mut-specific cellular apoptosis. Collectively, these results suggest that IDH1mut-induced SCD overexpression can rearrange the distribution of lipids in the organelles of glioma cells, providing new insight into the link between lipid metabolism and organelle morphology in these cells, with potential and unique therapeutic implications.
Item Description:Gesehen am 03.08.2021
Physical Description:Online Resource
ISSN:2041-1723
DOI:10.1038/s41467-020-20752-6

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