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  • Title: Growth hormone treatment on atherosclerosis: results of a 5-year open, prospective, controlled study in male patients with severe growth hormone deficiency.
    Author: Colao A, Di Somma C, Spiezia S, Savastano S, Rota F, Savanelli MC, Lombardi G.
    Journal: J Clin Endocrinol Metab; 2008 Sep; 93(9):3416-24. PubMed ID: 18593773.
    Abstract:
    BACKGROUND: Severe GH deficiency (GHD) is associated with, increased cardiovascular risk and intima-media thickness (IMT) at major arteries. OBJECTIVE: The objective of the study was to investigate the 5-yr effects of GH replacement on common carotid IMT and insulin resistance syndrome (IRS) (at least two of the following: triglycerides levels > or = 1.7 mmol/liter, high-density lipoprotein-cholesterol levels < or = 1.0 mmol/liter, blood pressure above 130/85 mm Hg, fasting glucose 6.1-7 or 2 hr after glucose 7.7-11.1 mmol/liter). DESIGN: This was an interventional, open, prospective, controlled study. PATIENTS: Patients included 35 men with severe GHD and 35 age-matched healthy men as controls. INTERVENTION: All patients received standard replacement therapy; GH replacement was added in 22 patients (group A) and refused by 13 others (group B). MEASUREMENTS: Five-year changes in IMT and IRS prevalence were measured. RESULTS: At baseline, IMT was higher in the patients with (P < 0.001) and without IRS (P = 0.004) than in controls. Eighteen patients (51.4%) and two controls (5.7%; P < 0.0001) had IRS. At study end, use of lipid-lowering drugs (92.3, vs. 13.6 and 34.3%, P < 0.0001), glucose-lowering drugs (69.2 vs. 31.4 and 22.7%; P = 0.016), and antihypertensive drugs (61.5 vs. 20.0 and 4.5%; P < 0.0001) was higher in group B patients than controls and group A patients. IGF-I levels normalized in all group A patients and remained lower than -1 sd score in 77% of group B patients. IMT significantly decreased only in group A and significantly increased in controls and nonsignificantly in group B patients. IRS prevalence significantly reduced only in group A patients. CONCLUSIONS: Severely hypopituitary GHD men have more frequently increased IMT at common carotid arteries and IRS than controls. After 5 years, only in GH replaced patients, IMT and prevalence of IRS decreased.
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