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Related Experiment Videos

The critical parameters in GH excess.

M C Sheppard1

  • 1School of Medicine, University of Birmingham, Birmingham, UK. m.c.sheppard@bham.ac.uk

Journal of Endocrinological Investigation
|August 24, 2005
PubMed
Summary
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Effective control of growth hormone (GH) and insulin-like growth factor-I (IGF-I) levels in acromegaly normalizes mortality. Optimal management requires understanding the complex relationship between GH and IGF-I for improved patient outcomes.

Area of Science:

  • Endocrinology
  • Metabolic Disorders
  • Oncology

Background:

  • Acromegaly management relies on monitoring growth hormone (GH) and insulin-like growth factor-I (IGF-I) levels.
  • Effective control of GH and IGF-I normalizes mortality risk in acromegaly patients.
  • The relative importance of GH versus IGF-I in predicting long-term outcomes remains debated.

Purpose of the Study:

  • To re-evaluate the relationship between GH and IGF-I in acromegaly management.
  • To understand the impact of discordant GH and IGF-I levels on patient morbidity and mortality.
  • To inform the development of new therapies like GH receptor antagonists.

Main Methods:

  • Review of epidemiological studies and clinical data on acromegaly treatment outcomes.
  • Analysis of post-treatment GH and IGF-I levels in relation to mortality and disease recurrence.

Related Experiment Videos

  • Examination of discordant GH and IGF-I values in treated acromegaly patients.

    • Main Results:

    • Normalization of GH levels below 2-2.5 microg/l is associated with general population mortality rates.
    • IGF-I normalization correlates with survival, but it's not an independent predictor of mortality.
    • Discordant GH and IGF-I values occur in up to 30% of treated patients, with unclear prognostic impact.
    • Elevated nadir GH levels, even with normal IGF-I, indicate increased recurrence risk post-surgery.

    Conclusions:

    • Achieving optimal health in acromegaly likely requires normalization of both GH and IGF-I levels.
    • A clearer understanding of the interplay between GH and IGF-I is crucial for refining acromegaly treatment strategies.
    • Further research is needed to elucidate the impact of discordant GH/IGF-I levels on long-term morbidity and mortality.