Activation of a metabolic gene regulatory network downstream of mTOR complex 1
What this study shows
Used cells with constitutively active mTORC1 (TSC2 loss) and rapamycin to map what mTORC1 switches on besides protein synthesis. Gene expression and metabolite profiling showed that mTORC1 activation is enough to drive glycolysis, the oxidative pentose phosphate pathway and de novo lipid synthesis. This ran through a transcriptional program of HIF1alpha and SREBP1/2 target genes; SREBP1 and 2 were needed for proliferation downstream of mTORC1, and their activation required S6K1. Boundary: cultured cells, mostly mouse fibroblasts with genetic mTORC1 activation; tissue and human relevance not tested here.
At a glance
| Evidence type | M Molecular — cells, biochemistry, structure Marked M because it is molecular or in-vitro work (model: Tsc2-/- mouse embryonic fibroblasts and other cells with rapamycin; transcriptomics, metabolomics, RNAi) rather than a whole-organism health-outcome study. That is often exactly where causal biology gets established -- the code says which system the finding was shown in, and nothing about how good the work is. |
| Study type | 5 - Mechanistic / In Vitro |
| Model system | Tsc2-/- mouse embryonic fibroblasts and other cells with rapamycin; transcriptomics, metabolomics, RNAi |
| Journal | Molecular Cell |
| Year | 2010 |
| Peer reviewed | Yes |
| Record last updated | 2026-10-01 |
| Source | DOI 10.1016/j.molcel.2010.06.022 · PMID 20670887 · Free full text (PMC2946786) |
Extracted findings
These fields were extracted from the paper with AI assistance and have not been checked against the source. Read them as a pointer into the paper, not as curated claims; where they disagree with the curated summary above, the curated summary stands.
| Intervention | Tsc2 loss (constitutive mTORC1); rapamycin; SREBP and S6K1 knockdown |
| Target | mTORC1 -> HIF1alpha, SREBP1/2 (via S6K1) |
| Model | Mouse embryonic fibroblasts and other cell lines |
| Effect | mTORC1 activates glycolysis, oxidative PPP and lipid synthesis via HIF1alpha and SREBP |
In the Atlas
Related topics
Links in the pathway map
- Supports mTORC1 activates SREBP1 / SREBP2
- Supports SREBP1 / SREBP2 activates Lipid synthesis
- Supports mTORC1 activates HIF-1α
More studies on this topic
- Impaired mTOR/SREBP1-Mediated Lipogenesis as a Mechanism of Hepatic Glycogen Accumulation in a Carnivorous Fish Model, Largemouth Bass (Micropterus salmoides) (2026)
- Hepatic mTORC2 activates glycolysis and lipogenesis through Akt, glucokinase, and SREBP1c (2012)
- Sterol regulatory element-binding proteins are essential for the metabolic programming of effector T cells and adaptive immunity (2013)
- mTOR complex 1 regulates lipin 1 localization to control the SREBP pathway (2011)
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