STUDIES IN CONSTITUTIONALLY TALL ADOLESCENTS: SOMATOSTATIN DECREASE ASSOCIATED WITH GROWTH HORMONE INCREASE AFTER TRH INJECTION

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Abstract
The paradoxical GH response to TRH observed in certain adolescents with constitutional tall stature is associated with a 60% fall in plasma levels of somatostatin. Conversely, those tall subjects who do not show a GH increase after TRH, or during a saline control infusion maintain steady levels of somatostatin in plasma. It is thus hypothesized that the GH release after TRH is due to a decreased inhibitory effect of somatostatin at the pituitary level and that this reduced effect may play an aetiological role in certain children with 'constitutional' tall stature.

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