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Related Experiment Videos

Insulin-like growth factor II (IGF-II)

S D O'Dell1, I N Day

  • 1Wessex Human Genetics Institute, Southampton University Hospitals NHS Trust, UK. s.d.o'dell@soton.ac.uk

The International Journal of Biochemistry & Cell Biology
|September 2, 1998
PubMed
Summary

Insulin-like growth factor II (IGF-II) is crucial for mammalian growth and development. Dysregulation of IGF2 imprinting is linked to overgrowth syndromes and cancers, suggesting therapeutic potential for obesity.

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Area of Science:

  • Endocrinology
  • Molecular Biology
  • Genetics

Background:

  • Insulin-like growth factor II (IGF-II) is a peptide hormone vital for mammalian growth, affecting fetal cell division, differentiation, and metabolic regulation.
  • It shares sequence homology with insulin and IGF-I, with the liver as the primary endocrine source, though autocrine/paracrine activity is widespread.
  • Biological effects are mediated by type 1 receptors, while type 2 receptors are involved in IGF-II degradation, with binding proteins modulating activity.

Purpose of the Study:

  • To explore the multifaceted roles of IGF-II in mammalian growth and development.
  • To investigate the implications of IGF2 gene imprinting, particularly its relaxation in certain diseases.
  • To assess the potential of IGF-II as a therapeutic target for conditions like obesity.

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Main Methods:

  • Review of existing literature on IGF-II function, receptor interactions, and binding proteins.
  • Analysis of the IGF2 gene imprinting mechanism in mammals.
  • Examination of the association between IGF2 gene cluster and body weight regulation.

Main Results:

  • IGF-II significantly influences fetal growth and development.
  • Relaxation of IGF2 imprinting is observed in Beckwith-Wiedemann syndrome, Wilms' tumour, and other cancers.
  • The IGF2-INS gene cluster may influence adult body weight.

Conclusions:

  • IGF-II is a critical regulator of mammalian growth.
  • Aberrant IGF2 imprinting is a hallmark of specific overgrowth disorders and cancers.
  • Targeting IGF-II pathways presents a potential therapeutic strategy for obesity.