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Endothelial function and coagulant factors in human growth hormone HGH treated hypopituitary adults receiving desmopressin.

Smith JC - J Clin Endocrinol Metab - 01-MAY-2003; 88(5): 2152-6
NLM Citation ID:
12727969 (PubMed)
Full Source Title:
Journal of Clinical Endocrinology and Metabolism
Publication Type:
Journal Article
Author Affiliation:
Department of Medicine, University Hospital of Wales, Cardiff CF14 4XN, United Kingdom.
Smith JC; Lane HA; Lewis J; Dann S; Goodfellow J; Collins P; Evans LM; Scanlon MF; Davies JS
Although HGH deficiency may underlie the increased cardiovascular risk in adult hypopituitarism, other coexisting hormonal deficiencies and/or unphysiological hormone replacement may contribute. L-Deamino-8-D-arginine (DDAVP), when administered parenterally, potentiates hemostasis by increasing plasma procoagulant factors. We investigated whether chronic intranasal DDAVP therapy influences clotting factors (plasma fibrinogen, factor VIII, and von Willebrand factor antigen) and endothelial function (flow-mediated dilation of the brachial artery) in 30 GH-treated hypopituitary subjects, including both DDAVP-treated subjects (group A) (mean age, 46 +/- 11 yr) and vasopressin-sufficient subjects (group B) (mean age, 47 +/- 16 yr). Fifteen healthy controls (group C) (mean age, 48 +/- 12 yr) were also studied. All hypopituitary patients were receiving stable GH replacement (median duration, 19 months). Comparing the three groups, concentrations of fibrinogen (mean +/- SD) (A, 3.3 +/- 1.0 g/liter vs. B, 3.5 +/- 0.9 vs. C, 2.6 +/- 0.8, P < 0.05), factor VIII (A, 130% +/- 30% vs. B, 128% +/- 30% vs. C, 104% +/- 35%, P < 0.05) and von Willebrand factor antigen (A, 124% +/- 35% vs. B, 134% +/- 45% vs. C, 93% +/- 36%, P < 0.05) were higher in hypopituitary subjects, compared with controls. However, there were no differences in clotting factors between groups A and B. Flow-mediated dilation did not differ significantly between the two hypopituitary groups (A, 5.9% +/- 2.0% vs. B, 4.7% +/- 1.6%) and was similar to that in the control group (C, 5.7% +/- 2.1%). In conclusion, although endothelium-dependent vasodilation is intact in HGH-treated hypopituitary adults, elevated concentrations of hemostatic markers suggest the persistence of a prothrombotic tendency and endothelial dysfunction. Intranasal DDAVP does not appear to influence this proatherogenic profile in hypopituitary adults with vasopressin deficiency.
Major Subjects:

Additional Subjects:

Chemical Compound Name:
(Blood Coagulation Factors); (Lipoproteins, HDL Cholesterol); (Lipoproteins, LDL Cholesterol); (Triglycerides); (von Willebrand Factor); 12629-01-5(Human Growth Hormone); 16679-58-6(Desmopressin); 57-88-5(Cholesterol); 67763-96-6(Insulin-Like Growth Factor I); 9001-27-8(Factor VIII); 9001-32-5(Fibrinogen)

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