Short-term effects of growth hormone (GH) treatment or deprivation on cardiovascular risk parameters and intima-media thickness at carotid arteries in patients with severe GH deficiency

Annamaria Colao, Carolina Di Somma, Francesca Rota, Rosario Pivonello, Maria Cristina Savanelli, Stefano Spiezia, Gaetano Lombardi

Research output: Contribution to journalArticle

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Abstract

To explore early effects of GH treatment or deprivation on cardiovascular risk factors and carotid intima-media thickness (IMT), we designed this randomized, cross-over study in 34 adult patients with severe GH deficiency. At study entry, the patients were randomized into two groups (A and B); group A (n = 17) received appropriate replacement therapy including GH at standard doses for 6 months and then were withdrawn from GH for the subsequent 6 months; group B (n = 17) received appropriate replacement therapy excluding GH for 6 months with the addition of GH in the subsequent 6 months. After the first 6 months, we observed a significant increase in IGF-I levels and of high-density lipoprotein (HDL)-cholesterol together with a significant decrease in diastolic blood pressure, the total/HDL-cholesterol ratio, and C-reactive protein in the patients in group A, whereas vascular parameters did not significantly change. In the patients in group B, none of the parameters studied significantly changed. After 6 months of GH withdrawal in the patients in group A, a significant decrease in IGF-I levels, a significant increase in the total/HDL-cholesterol ratio and C-reactive protein, and a trend toward an impairment of carotid IMT and peak velocities were observed. In the patients in group B, the addition of GH to the standard replacement induced a significant increase in IGF-I levels together with a decrease in systolic and diastolic blood pressure, total cholesterol and total/HDL-cholesterol ratio, and C-reactive protein, and an increase in HDL-cholesterol levels with a tread toward an improvement of vascular parameters. At the end of the study, mean IMT was significantly lower than at baseline both in group A (from 0.88 ± 0.28 to 0.85 ± 0.27 mm, P = 0.0003) and in group B (from 0.83 ± 0.21 to 0.80 ± 0.20 min, P = 0.003). In conclusion, 6 months of GH replacement has beneficial effects whereas 6 months of GH deprivation has detrimental effects on cardiovascular risk factors and atherosclerosis. These findings support the indication for GH replacement in severe GH deficiency adult patients.

Original languageEnglish
Pages (from-to)2056-2062
Number of pages7
JournalJournal of Clinical Endocrinology and Metabolism
Volume90
Issue number4
DOIs
Publication statusPublished - Apr 2005

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Carotid Arteries
Growth Hormone
HDL Cholesterol
Therapeutics
Insulin-Like Growth Factor I
C-Reactive Protein
Blood Pressure
Carotid Intima-Media Thickness
Blood pressure
Blood Vessels
Cross-Over Studies
Atherosclerosis
Cholesterol

ASJC Scopus subject areas

  • Biochemistry
  • Endocrinology, Diabetes and Metabolism

Cite this

Short-term effects of growth hormone (GH) treatment or deprivation on cardiovascular risk parameters and intima-media thickness at carotid arteries in patients with severe GH deficiency. / Colao, Annamaria; Di Somma, Carolina; Rota, Francesca; Pivonello, Rosario; Savanelli, Maria Cristina; Spiezia, Stefano; Lombardi, Gaetano.

In: Journal of Clinical Endocrinology and Metabolism, Vol. 90, No. 4, 04.2005, p. 2056-2062.

Research output: Contribution to journalArticle

Colao, Annamaria ; Di Somma, Carolina ; Rota, Francesca ; Pivonello, Rosario ; Savanelli, Maria Cristina ; Spiezia, Stefano ; Lombardi, Gaetano. / Short-term effects of growth hormone (GH) treatment or deprivation on cardiovascular risk parameters and intima-media thickness at carotid arteries in patients with severe GH deficiency. In: Journal of Clinical Endocrinology and Metabolism. 2005 ; Vol. 90, No. 4. pp. 2056-2062.
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T1 - Short-term effects of growth hormone (GH) treatment or deprivation on cardiovascular risk parameters and intima-media thickness at carotid arteries in patients with severe GH deficiency

AU - Colao, Annamaria

AU - Di Somma, Carolina

AU - Rota, Francesca

AU - Pivonello, Rosario

AU - Savanelli, Maria Cristina

AU - Spiezia, Stefano

AU - Lombardi, Gaetano

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AB - To explore early effects of GH treatment or deprivation on cardiovascular risk factors and carotid intima-media thickness (IMT), we designed this randomized, cross-over study in 34 adult patients with severe GH deficiency. At study entry, the patients were randomized into two groups (A and B); group A (n = 17) received appropriate replacement therapy including GH at standard doses for 6 months and then were withdrawn from GH for the subsequent 6 months; group B (n = 17) received appropriate replacement therapy excluding GH for 6 months with the addition of GH in the subsequent 6 months. After the first 6 months, we observed a significant increase in IGF-I levels and of high-density lipoprotein (HDL)-cholesterol together with a significant decrease in diastolic blood pressure, the total/HDL-cholesterol ratio, and C-reactive protein in the patients in group A, whereas vascular parameters did not significantly change. In the patients in group B, none of the parameters studied significantly changed. After 6 months of GH withdrawal in the patients in group A, a significant decrease in IGF-I levels, a significant increase in the total/HDL-cholesterol ratio and C-reactive protein, and a trend toward an impairment of carotid IMT and peak velocities were observed. In the patients in group B, the addition of GH to the standard replacement induced a significant increase in IGF-I levels together with a decrease in systolic and diastolic blood pressure, total cholesterol and total/HDL-cholesterol ratio, and C-reactive protein, and an increase in HDL-cholesterol levels with a tread toward an improvement of vascular parameters. At the end of the study, mean IMT was significantly lower than at baseline both in group A (from 0.88 ± 0.28 to 0.85 ± 0.27 mm, P = 0.0003) and in group B (from 0.83 ± 0.21 to 0.80 ± 0.20 min, P = 0.003). In conclusion, 6 months of GH replacement has beneficial effects whereas 6 months of GH deprivation has detrimental effects on cardiovascular risk factors and atherosclerosis. These findings support the indication for GH replacement in severe GH deficiency adult patients.

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