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Transcriptional and metabolic rewiring of colorectal cancer cells expressing the oncogenic KRAS(G13D) mutation

Charitou, Theodosia (author)
South Australian Hlth & Med Res Inst, EMBL Australia Grp, Adelaide, SA 5000, Australia.
Srihari, Sriganesh (author)
South Australian Hlth & Med Res Inst, EMBL Australia Grp, Adelaide, SA 5000, Australia.
Lynn, Miriam A. (author)
South Australian Hlth & Med Res Inst, EMBL Australia Grp, Adelaide, SA 5000, Australia.
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Jarboui, Mohamed-Ali (author)
Univ Tubingen, Inst Ophthalm Res, Tubingen, Germany.;Univ Tubingen, Werner Siemens Imaging Ctr, Tubingen, Germany.
Fasterius, Erik, 1987- (author)
KTH,Systembiologi
Moldovan, Max (author)
South Australian Hlth & Med Res Inst, EMBL Australia Grp, Adelaide, SA 5000, Australia.
Shirasawa, Senji (author)
Fukuoka Univ, Fac Med, Fukuoka, Fukuoka 8140133, Japan.
Tsunoda, Toshiyuki (author)
Fukuoka Univ, Fac Med, Fukuoka, Fukuoka 8140133, Japan.
Ueffing, Marius (author)
Univ Tubingen, Inst Ophthalm Res, Tubingen, Germany.
Xie, Jianling (author)
South Australian Hlth & Med Res Inst, Nutr Diabet & Metab, Adelaide, SA 5000, Australia.
Xin, Jin (author)
South Australian Hlth & Med Res Inst, Nutr Diabet & Metab, Adelaide, SA 5000, Australia.
Wang, Xuemin (author)
South Australian Hlth & Med Res Inst, Nutr Diabet & Metab, Adelaide, SA 5000, Australia.;Univ Adelaide, Sch Biol Sci, Adelaide, SA 5000, Australia.
Proud, Christopher G. (author)
South Australian Hlth & Med Res Inst, Nutr Diabet & Metab, Adelaide, SA 5000, Australia.;Univ Adelaide, Sch Biol Sci, Adelaide, SA 5000, Australia.
Boldt, Karsten (author)
Univ Tubingen, Inst Ophthalm Res, Tubingen, Germany.
Al-Khalili Szigyarto, Cristina (author)
KTH,Systembiologi
Kolch, Walter (author)
Univ Coll Dublin, Syst Biol Ireland, Dublin, Ireland.;Univ Coll Dublin, Sch Med, Dublin, Ireland.;Univ Coll Dublin, Conway Inst, Dublin, Ireland.
Lynn, David J. (author)
South Australian Hlth & Med Res Inst, EMBL Australia Grp, Adelaide, SA 5000, Australia.;Flinders Univ S Australia, Coll Med & Publ Hlth, Sch Med, Bedford Pk, SA 5042, Australia.
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South Australian Hlth & Med Res Inst, EMBL Australia Grp, Adelaide, SA 5000, Australia Univ Tubingen, Inst Ophthalm Res, Tubingen, Germany.;Univ Tubingen, Werner Siemens Imaging Ctr, Tubingen, Germany. (creator_code:org_t)
2019-05-28
2019
English.
In: British Journal of Cancer. - : NATURE PUBLISHING GROUP. - 0007-0920 .- 1532-1827. ; 121:1, s. 37-50
Related links:
https://doi.org/10.1...
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https://urn.kb.se/re...
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  • Journal article (peer-reviewed)
Abstract Subject headings
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  • BACKGROUND: Activating mutations in KRAS frequently occur in colorectal cancer (CRC) patients, leading to resistance to EGFRtargeted therapies. METHODS: To better understand the cellular reprogramming which occurs in mutant KRAS cells, we have undertaken a systems-level analysis of four CRC cell lines which express either wild type (wt) KRAS or the oncogenic KRAS(G13D) allele (mtKRAS). RESULTS: RNAseq revealed that genes involved in ribosome biogenesis, mRNA translation and metabolism were significantly upregulated in mtKRAS cells. Consistent with the transcriptional data, protein synthesis and cell proliferation were significantly higher in the mtKRAS cells. Targeted metabolomics analysis also confirmed the metabolic reprogramming in mtKRAS cells. Interestingly, mtKRAS cells were highly transcriptionally responsive to EGFR activation by TGF alpha stimulation, which was associated with an unexpected downregulation of genes involved in a range of anabolic processes. While TGF alpha treatment strongly activated protein synthesis in wtKRAS cells, protein synthesis was not activated above basal levels in the TGF alpha-treated mtKRAS cells. This was likely due to the defective activation of the mTORC1 and other pathways by TGF alpha in mtKRAS cells, which was associated with impaired activation of PKB signalling and a transient induction of AMPK signalling. CONCLUSIONS: We have found that mtKRAS cells are substantially rewired at the transcriptional, translational and metabolic levels and that this rewiring may reveal new vulnerabilities in oncogenic KRAS CRC cells that could be exploited in future.

Subject headings

MEDICIN OCH HÄLSOVETENSKAP  -- Medicinska och farmaceutiska grundvetenskaper -- Cell- och molekylärbiologi (hsv//swe)
MEDICAL AND HEALTH SCIENCES  -- Basic Medicine -- Cell and Molecular Biology (hsv//eng)

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