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PMID: 19948145 Published · ppublish English Journal Article Review

An emerging role of mTOR in lipid biosynthesis.

Current biology : CB ·Vol. 19 ·No. 22 ·2009-12-01 ·Pages R1046-52

Laplante M, Sabatini DM

Abstract

Lipid biosynthesis is essential for the maintenance of cellular homeostasis. The lipids produced by cells (glycerolipids, fatty acids, phospholipids, cholesterol, and sphingolipids) are used as an energy source/reserve, as building blocks for membrane biosynthesis, as precursor molecules for the synthesis of various cellular products, and as signaling molecules. Defects in lipid synthesis or processing contribute to the development of many diseases, including obesity, insulin resistance, type 2 diabetes, non-alcoholic fatty liver disease, and cancer. Studies published over the last few years have shown that the target of rapamycin (TOR), a conserved serine/threonine kinase with an important role in regulating cell growth, controls lipid biosynthesis through various mechanisms. Here, we review these findings and briefly discuss their potential relevance for human health and disease.

MeSH Terms
Humans Intracellular Signaling Peptides and Proteins/physiology Lipids/biosynthesis Nuclear Proteins/physiology PPAR gamma/physiology Phosphatidate Phosphatase Protein Serine-Threonine Kinases/physiology Sterol Regulatory Element Binding Protein 1/physiology TOR Serine-Threonine Kinases
Chemicals
Intracellular Signaling Peptides and Proteins Lipids Nuclear Proteins PPAR gamma SREBF1 protein, human Sterol Regulatory Element Binding Protein 1 MTOR protein, human Protein Serine-Threonine Kinases TOR Serine-Threonine Kinases LPIN1 protein, human Phosphatidate Phosphatase
Authors & Affiliations
2 authors, click to expand affiliations / ORCID
Laplante Mathieu
Whitehead Institute for Biomedical Research, Nine Cambridge Center, Cambridge, MA 02142, USA.
Sabatini David M
References (48)
48 references, click to expand
  1. Insulin-stimulated phosphorylation of lipin mediated by the mammalian target of rapamycin.
    Proc Natl Acad Sci U S A. 2002 Jan 22;99(2):1047-52 PMID: 11792863
  2. Role of AMP-activated protein kinase in mechanism of metformin action.
    J Clin Invest. 2001 Oct;108(8):1167-74 PMID: 11602624
  3. Acetyl-CoA carboxylase 2 mutant mice are protected against obesity and diabetes induced by high-fat/high-carbohydrate diets.
    Proc Natl Acad Sci U S A. 2003 Sep 2;100(18):10207-12 PMID: 12920182
  4. Defining the role of mTOR in cancer.
    Cancer Cell. 2007 Jul;12(1):9-22 PMID: 17613433
  5. Regulation of ceramide biosynthesis by TOR complex 2.
    Cell Metab. 2008 Feb;7(2):148-58 PMID: 18249174
  6. Lipin1 is a key factor for the maturation and maintenance of adipocytes in the regulatory network with CCAAT/enhancer-binding protein alpha and peroxisome proliferator-activated receptor gamma 2.
    J Biol Chem. 2008 Dec 12;283(50):34896-906 PMID: 18930917
  7. Lipin expression preceding peroxisome proliferator-activated receptor-gamma is critical for adipogenesis in vivo and in vitro.
    J Biol Chem. 2004 Jul 9;279(28):29558-64 PMID: 15123608
  8. AKT/PKB signaling: navigating downstream.
    Cell. 2007 Jun 29;129(7):1261-74 PMID: 17604717
  9. Sources of fatty acids stored in liver and secreted via lipoproteins in patients with nonalcoholic fatty liver disease.
    J Clin Invest. 2005 May;115(5):1343-51 PMID: 15864352
  10. Rapamycin-sensitive phase of 3T3-L1 preadipocyte differentiation after clonal expansion.
    J Cell Physiol. 2001 Oct;189(1):14-22 PMID: 11573200
  11. regulation of peroxisome proliferator-activated receptor-gamma activity by mammalian target of rapamycin and amino acids in adipogenesis.
    Diabetes. 2004 Nov;53(11):2748-56 PMID: 15504954
  12. PKB/Akt induces transcription of enzymes involved in cholesterol and fatty acid biosynthesis via activation of SREBP.
    Oncogene. 2005 Sep 29;24(43):6465-81 PMID: 16007182
  13. Activation of the mammalian target of rapamycin pathway acutely inhibits insulin signaling to Akt and glucose transport in 3T3-L1 and human adipocytes.
    Endocrinology. 2005 Mar;146(3):1328-37 PMID: 15576463
  14. ADD1/SREBP1 activates PPARgamma through the production of endogenous ligand.
    Proc Natl Acad Sci U S A. 1998 Apr 14;95(8):4333-7 PMID: 9539737
  15. Role of the PI3-kinase/mTor pathway in the regulation of the stearoyl CoA desaturase (SCD1) gene expression by insulin in liver.
    J Cell Commun Signal. 2007 Sep;1(2):113-25 PMID: 18481202
  16. Loss of stearoyl-CoA desaturase-1 function protects mice against adiposity.
    Proc Natl Acad Sci U S A. 2002 Aug 20;99(17):11482-6 PMID: 12177411
  17. Rapamycin inhibits human adipocyte differentiation in primary culture.
    Obes Res. 2000 May;8(3):249-54 PMID: 10832768
  18. Active-site inhibitors of mTOR target rapamycin-resistant outputs of mTORC1 and mTORC2.
    PLoS Biol. 2009 Feb 10;7(2):e38 PMID: 19209957
  19. Adipose-specific knockout of raptor results in lean mice with enhanced mitochondrial respiration.
    Cell Metab. 2008 Nov;8(5):399-410 PMID: 19046571
  20. Insulin stimulates adipogenesis through the Akt-TSC2-mTORC1 pathway.
    PLoS One. 2009 Jul 10;4(7):e6189 PMID: 19593385
  21. Adipocyte differentiation from the inside out.
    Nat Rev Mol Cell Biol. 2006 Dec;7(12):885-96 PMID: 17139329
  22. SREBP-1c transcription factor and lipid homeostasis: clinical perspective.
    Horm Res. 2007;68(2):72-82 PMID: 17344645
  23. (Patho)physiological significance of the serum- and glucocorticoid-inducible kinase isoforms.
    Physiol Rev. 2006 Oct;86(4):1151-78 PMID: 17015487
  24. The immunosuppressant rapamycin mimics a starvation-like signal distinct from amino acid and glucose deprivation.
    Mol Cell Biol. 2002 Aug;22(15):5575-84 PMID: 12101249
  25. Rictor/TORC2 regulates fat metabolism, feeding, growth, and life span in Caenorhabditis elegans.
    Genes Dev. 2009 Feb 15;23(4):496-511 PMID: 19240135
  26. New insights into mTOR signaling: mTORC2 and beyond.
    Sci Signal. 2009 Apr 21;2(67):pe27 PMID: 19383978
  27. Rapamycin inhibits clonal expansion and adipogenic differentiation of 3T3-L1 cells.
    Proc Natl Acad Sci U S A. 1995 Nov 21;92(24):11086-90 PMID: 7479942
  28. Inhibition of insulin signaling and adipogenesis by rapamycin: effect on phosphorylation of p70 S6 kinase vs eIF4E-BP1.
    Int J Obes Relat Metab Disord. 2004 Feb;28(2):191-8 PMID: 14970836
  29. mTOR complex 2 in adipose tissue negatively controls whole-body growth.
    Proc Natl Acad Sci U S A. 2009 Jun 16;106(24):9902-7 PMID: 19497867
  30. Ku-0063794 is a specific inhibitor of the mammalian target of rapamycin (mTOR).
    Biochem J. 2009 Jun 12;421(1):29-42 PMID: 19402821
  31. Fatty acid synthase and the lipogenic phenotype in cancer pathogenesis.
    Nat Rev Cancer. 2007 Oct;7(10):763-77 PMID: 17882277
  32. SREBPs: activators of the complete program of cholesterol and fatty acid synthesis in the liver.
    J Clin Invest. 2002 May;109(9):1125-31 PMID: 11994399
  33. The mammalian target of rapamycin regulates lipid metabolism in primary cultures of rat hepatocytes.
    Metabolism. 2007 Nov;56(11):1500-7 PMID: 17950100
  34. Elevated sensitivity to diet-induced obesity and insulin resistance in mice lacking 4E-BP1 and 4E-BP2.
    J Clin Invest. 2007 Feb;117(2):387-96 PMID: 17273556
  35. Prolonged rapamycin treatment inhibits mTORC2 assembly and Akt/PKB.
    Mol Cell. 2006 Apr 21;22(2):159-68 PMID: 16603397
  36. Rictor/TORC2 regulates Caenorhabditis elegans fat storage, body size, and development through sgk-1.
    PLoS Biol. 2009 Mar 3;7(3):e60 PMID: 19260765
  37. Regulation of adipocyte differentiation and insulin action with rapamycin.
    Biochem Biophys Res Commun. 2004 Sep 3;321(4):942-8 PMID: 15358118
  38. SREBP activity is regulated by mTORC1 and contributes to Akt-dependent cell growth.
    Cell Metab. 2008 Sep;8(3):224-36 PMID: 18762023
  39. Thematic Review Series: Glycerolipids. Multiple roles for lipins/phosphatidate phosphatase enzymes in lipid metabolism.
    J Lipid Res. 2008 Dec;49(12):2493-503 PMID: 18791037
  40. Distinct roles of insulin and liver X receptor in the induction and cleavage of sterol regulatory element-binding protein-1c.
    Proc Natl Acad Sci U S A. 2005 Jan 18;102(3):791-6 PMID: 15637161
  41. Absence of S6K1 protects against age- and diet-induced obesity while enhancing insulin sensitivity.
    Nature. 2004 Sep 9;431(7005):200-5 PMID: 15306821
  42. Thematic review series: sphingolipids. New insights into sphingolipid metabolism and function in budding yeast.
    J Lipid Res. 2008 May;49(5):909-21 PMID: 18296751
  43. Mechanisms of nutritional and hormonal regulation of lipogenesis.
    EMBO Rep. 2001 Apr;2(4):282-6 PMID: 11306547
  44. Obesity and hepatocellular carcinoma.
    Gastroenterology. 2004 Nov;127(5 Suppl 1):S97-103 PMID: 15508109
  45. Adipose tissue as an endocrine organ.
    J Clin Endocrinol Metab. 2004 Jun;89(6):2548-56 PMID: 15181022
  46. Up-regulation of mitochondrial activity and acquirement of brown adipose tissue-like property in the white adipose tissue of fsp27 deficient mice.
    PLoS One. 2008 Aug 06;3(8):e2890 PMID: 18682832
  47. An ATP-competitive mammalian target of rapamycin inhibitor reveals rapamycin-resistant functions of mTORC1.
    J Biol Chem. 2009 Mar 20;284(12):8023-32 PMID: 19150980
  48. A new player in the orchestra of cell growth: SREBP activity is regulated by mTORC1 and contributes to the regulation of cell and organ size.
    Biochem Soc Trans. 2009 Feb;37(Pt 1):278-83 PMID: 19143646
Article Info
Journal
Current biology : CB
Abbr.
Curr Biol
ISSN
1879-0445
Published
2009-12-01
Pages
R1046-52
Language
English
Region
England
NLM ID
9107782
PMCID
PMC3390254
Subset
IM
Grants
NIAID NIH HHS · R01 AI047389 · United States
NCI NIH HHS · R01 CA103866 · United States
NCI NIH HHS · R01 CA129105 · United States
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