Related Experiment Video

Updated: Feb 6, 2026

A RANKL-based Osteoclast Culture Assay of Mouse Bone Marrow to Investigate the Role of mTORC1 in Osteoclast Formation
09:37

A RANKL-based Osteoclast Culture Assay of Mouse Bone Marrow to Investigate the Role of mTORC1 in Osteoclast Formation

Published on: March 15, 2018

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mTORC1 and IRS1: Another Deadly Kiss

Amin Ardestani1, Kathrin Maedler1

  • 1University of Bremen, Centre for Biomolecular Interactions Bremen, Bremen 28359, Germany.

Trends in Endocrinology and Metabolism: TEM
|August 8, 2018
PubMed

Insights

Mechanistic target of rapamycin complex 1 (mTORC1) regulates cell metabolism. A new study reveals a negative feedback loop from mTORC1 to insulin receptor substrate 1 (IRS1), impacting insulin signaling.

Area of Science:

  • Cellular metabolism and signaling pathways.
  • Endocrinology and metabolic regulation.

Background:

  • Mechanistic target of rapamycin complex 1 (mTORC1) is a central regulator of cellular and organismal metabolism.
  • mTORC1 controls adaptation to nutrient availability, growth factors, and metabolic demands through feedback loops.
  • The insulin/insulin-like growth factor (IGF) signaling pathway, mediated by insulin receptor substrate 1 (IRS1), is crucial for metabolic control.

Purpose of the Study:

  • To identify and characterize a novel negative feedback loop involving mTORC1.
  • To investigate the relationship between mTORC1 activity and the insulin/IGF signaling pathway.

Main Methods:

  • Utilized molecular biology techniques to study protein interactions and signaling pathways.
  • Investigated the effects of mTORC1 modulation on IRS1 function and insulin signaling.

Main Results:

  • Identified a negative feedback mechanism where mTORC1 regulates IRS1.
  • Characterized the functional impact of this feedback loop on insulin/IGF signaling.

Conclusions:

  • Discovered a new regulatory axis connecting mTORC1 and insulin signaling via IRS1.
  • This finding provides insights into metabolic homeostasis and potential therapeutic targets.
Keywords:
IGF-IIRS1feedback loopsmTORC1mTORC2

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