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Updated: Jul 5, 2026

Optimized Protocol for Generating Functional Pancreatic Insulin-secreting Cells from Human Pluripotent Stem Cells
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Insulinlike growth factor binding proteins.

D R Clemmons1

  • 1Department of Medicine, University of North Carolina School of Medicine, Chapel Hill, NC 27599, USA.

Trends in Endocrinology and Metabolism: TEM
|November 1, 1990
PubMed
Summary
This summary is machine-generated.

Insulinlike growth factor binding proteins (IGFBPs) regulate insulinlike growth factor (IGF) interactions with cell receptors. These proteins, found in blood and secreted by cells, influence IGF signaling pathways.

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Area of Science:

  • Endocrinology
  • Molecular Biology
  • Cell Biology

Background:

  • Insulinlike growth factors (IGFs) are crucial for cell growth and development.
  • IGF activity is tightly regulated by specific binding proteins (IGFBPs).
  • IGFBPs are present in extracellular fluids and blood.

Purpose of the Study:

  • To summarize the role of Insulinlike Growth Factor Binding Proteins (IGFBPs) in regulating IGF action.
  • To highlight the presence and secretion of different IGFBP forms.
  • To discuss the regulatory mechanisms and functions of IGFBPs.

Main Methods:

  • Literature review on IGFBPs and their functions.
  • Analysis of existing data on IGFBP secretion and clearance.
  • Synthesis of information regarding IGF-receptor interactions modulated by IGFBPs.

Main Results:

  • At least four distinct IGFBP forms exist in blood.
  • IGFBPs are secreted by various cell types.
  • Hormonal regulation affects IGFBP secretion and clearance rates.
  • IGFBPs significantly alter IGFs' interaction with cell surface receptors.
  • IGFBPs also play roles in transport and modulating cellular actions.

Conclusions:

  • IGFBPs are key regulators of IGF bioavailability and signaling.
  • Their diverse functions impact IGF-receptor dynamics and cellular responses.
  • Understanding IGFBPs is critical for comprehending IGF-mediated biological processes.