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Related Experiment Videos

The ageing entero-insular axis

L Ranganath1, I Sedgwick, L Morgan

  • 1Epsom General Hospital, Surrey, UK.

Diabetologia
|December 2, 1998
PubMed
Summary
This summary is machine-generated.

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Aging impairs glucose tolerance by affecting insulin secretion. Older adults show increased glucose-dependent insulinotropic polypeptide (GIP) and glucagon-like peptide-1 (GLP-1) responses, suggesting a compensatory mechanism for age-related changes in the entero-insular axis.

Area of Science:

  • Endocrinology
  • Gerontology
  • Metabolic Health

Background:

  • Aging is a significant risk factor for glucose intolerance and Type II diabetes.
  • While reduced insulin secretion is noted in aging, age-related changes in key insulinotropic hormones like GIP and GLP-1 remain unclear.

Purpose of the Study:

  • To investigate the entero-insular axis in young versus older women.
  • To assess age-related differences in the secretion of glucose-dependent insulinotropic polypeptide (GIP) and glucagon-like peptide-1 (GLP-1) after oral carbohydrate intake.

Main Methods:

  • Comparative analysis of oral carbohydrate challenge in 6 young premenopausal and 6 older postmenopausal women.
  • Measurement of integrated insulin, glucose, GIP, and GLP-1 responses.

Related Experiment Videos

Main Results:

  • Similar integrated insulin and glucose responses were observed between the younger and older groups.
  • Older subjects exhibited significantly greater total integrated responses for both GIP and GLP-1.
  • Positive correlations were found between age and integrated glucose response (r=0.65) and GLP-1 response (r=0.85).

Conclusions:

  • Age-related impairment in insulin secretion in response to GIP and GLP-1 may contribute to reduced glucose tolerance in older adults.
  • The heightened compensatory increase in GIP and GLP-1 secretion underscores the importance of the entero-insular axis in regulating insulin secretion and highlights feedback mechanisms.