MTORC1 signaling and regulation of pancreatic β-cell mass

Manuel Blandino Rosano, Angela Y. Chen, Joshua O. Scheys, Emilyn U. Alejandro, Aaron P. Gould, Tatyana Taranukha, Lynda Elghazi, Corentin Cras-Méneur, Ernesto Bernal Mizrachi

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

The capacity of β cells to expand in response to insulin resistance is a critical factor in the development of type 2 diabetes. Proliferation of β cells is a major component for these adaptive responses in animal models. The extracellular signals responsible for β-cell expansion include growth factors, such as insulin, and nutrients, such as glucose and amino acids. AKT activation is one of the important components linking growth signals to the regulation of β-cell expansion. Downstream of AKT, tuberous sclerosis complex 1 and 2 (TSC1/2) and mechanistic target of rapamycin complex 1 (mTORC1) signaling have emerged as prime candidates in this process, because they integrate signals from growth factors and nutrients. Recent studies demonstrate the importance of mTORC1 signaling in β cells. This review will discuss recent advances in the understanding of how this pathway regulates β-cell mass and present data on the role of TSC1 in modulation of β-cell mass. Herein, we also demonstrate that deletion of Tsc1 in pancreatic β cells results in improved glucose tolerance, hyperinsulinemia and expansion of β-cell mass that persists with aging.

Original languageEnglish (US)
Pages (from-to)1892-1902
Number of pages11
JournalCell Cycle
Volume11
Issue number10
DOIs
StatePublished - May 15 2012
Externally publishedYes

Fingerprint

Intercellular Signaling Peptides and Proteins
Glucose
Food
Tuberous Sclerosis
Hyperinsulinism
Type 2 Diabetes Mellitus
Insulin Resistance
Animal Models
Cell Proliferation
Insulin
Amino Acids
Growth
mechanistic target of rapamycin complex 1
Tuberous Sclerosis 1
Tuberous Sclerosis 2

Keywords

  • β cells
  • β-cell signaling
  • AKT
  • Cell cycle
  • Glucose homeostasis
  • Insulin
  • Islets and proliferation
  • mTORC1
  • S6K
  • TSC1
  • TSC2

ASJC Scopus subject areas

  • Cell Biology
  • Molecular Biology
  • Developmental Biology

Cite this

Blandino Rosano, M., Chen, A. Y., Scheys, J. O., Alejandro, E. U., Gould, A. P., Taranukha, T., ... Bernal Mizrachi, E. (2012). MTORC1 signaling and regulation of pancreatic β-cell mass. Cell Cycle, 11(10), 1892-1902. https://doi.org/cc.20036

MTORC1 signaling and regulation of pancreatic β-cell mass. / Blandino Rosano, Manuel; Chen, Angela Y.; Scheys, Joshua O.; Alejandro, Emilyn U.; Gould, Aaron P.; Taranukha, Tatyana; Elghazi, Lynda; Cras-Méneur, Corentin; Bernal Mizrachi, Ernesto.

In: Cell Cycle, Vol. 11, No. 10, 15.05.2012, p. 1892-1902.

Research output: Contribution to journalArticle

Blandino Rosano, M, Chen, AY, Scheys, JO, Alejandro, EU, Gould, AP, Taranukha, T, Elghazi, L, Cras-Méneur, C & Bernal Mizrachi, E 2012, 'MTORC1 signaling and regulation of pancreatic β-cell mass', Cell Cycle, vol. 11, no. 10, pp. 1892-1902. https://doi.org/cc.20036
Blandino Rosano M, Chen AY, Scheys JO, Alejandro EU, Gould AP, Taranukha T et al. MTORC1 signaling and regulation of pancreatic β-cell mass. Cell Cycle. 2012 May 15;11(10):1892-1902. https://doi.org/cc.20036
Blandino Rosano, Manuel ; Chen, Angela Y. ; Scheys, Joshua O. ; Alejandro, Emilyn U. ; Gould, Aaron P. ; Taranukha, Tatyana ; Elghazi, Lynda ; Cras-Méneur, Corentin ; Bernal Mizrachi, Ernesto. / MTORC1 signaling and regulation of pancreatic β-cell mass. In: Cell Cycle. 2012 ; Vol. 11, No. 10. pp. 1892-1902.
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