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Pegvisomant therapy for acromegaly.

Pamela U Freda1

  • 1a Department of Medicine, Columbia College of Physicians and Surgeons, 630 West 168th Street, New York, NY 10032, USA. puf1@columbia.edu.

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Pegvisomant, a growth hormone receptor antagonist, effectively normalizes insulin-like growth factor-I in acromegaly patients. This novel therapy offers an alternative for those resistant to traditional treatments, improving symptoms and morbidities.

Keywords:
acromegalypegvisomant

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Area of Science:

  • Endocrinology
  • Pharmacology

Background:

  • Acromegaly treatment traditionally involves surgery, radiotherapy, and medical therapies, with limited success for some patients.
  • Pegvisomant, a growth hormone receptor antagonist, emerged in 2003 as a novel therapeutic option.

Purpose of the Study:

  • To evaluate the efficacy and safety of pegvisomant in treating acromegaly.
  • To assess pegvisomant's role in managing patients resistant to other therapies.

Main Methods:

  • Pegvisomant, a mutated human growth hormone, antagonizes growth hormone action at the receptor level.
  • Efficacy is monitored by serum insulin-like growth factor-I (IGF-I) levels, not by direct reduction of growth hormone levels.

Main Results:

  • Clinical trials demonstrated normalization of IGF-I levels in up to 97% of patients.
  • Pegvisomant improved acromegaly-related signs, symptoms, and morbidities, including insulin resistance.
  • It proved effective in patients resistant to somatostatin analog therapy.

Conclusions:

  • Pegvisomant is a well-tolerated and effective treatment for acromegaly, particularly for treatment-resistant cases.
  • Therapy requires individualized monitoring of IGF-I levels and clinical signs, with attention to potential tumor growth and liver transaminases.