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  • Title: Impaired glucose tolerance coincides with abnormal release of growth hormone following a glucose load as well as in response to TRH in acromegaly.
    Author: Zárate A, García IC, Morán C, Fonseca ME.
    Journal: Horm Metab Res; 1986 Jun; 18(6):400-1. PubMed ID: 3089892.
    Abstract:
    It is known that some acromegalic patients exhibited a paradoxical release of growth hormone (GH) after glucose administration. We have attempted to investigate a relationship between the paradoxical GH secretion with the abnormal glucose tolerance test present in some cases of acromegaly. We also studied the inappropriate increase in GH levels following thyrotropin releasing hormone (TRH) injection which is present in some acromegalics. We found that only those patients who had an abnormal glucose tolerance test exhibited simultaneously, the paradoxical release of GH, moreover, the same patients showed GH release following TRH administration. This observation suggests that some acromegalics have an abnormality in their hypothalamic glucose receptor and such abnormality is associated with abnormal GH secretion when TRH is administered. On basis of these findings it is suggested that the hypothalamus may play an important role in the pathogenesis of acromegaly in these cases.
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