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• W2981645586 abstract "The X-linked immunoglobulin superfamily, member 1 (IGSF1), gene is highly expressed in the hypothalamus and in pituitary cells of the POU1F1 lineage. Human loss-of-function mutations in IGSF1 cause central hypothyroidism, hypoprolactinemia, and macroorchidism. Additionally, most affected adults exhibit higher than average IGF-1 levels and anecdotal reports describe acromegaloid features in older subjects. However, somatotrope function has not yet been formally evaluated in this condition.We aimed to evaluate the role of IGSF1 in human and murine somatotrope function.We evaluated 21 adult males harboring hemizygous IGSF1 loss-of-function mutations for features of GH excess, in an academic clinical setting.We compared biochemical and tissue markers of GH excess in patients and controls, including 24-hour GH profile studies in 7 patients. Parallel studies were undertaken in male Igsf1-deficient mice and wild-type littermates.IGSF1-deficient adult male patients demonstrated acromegaloid facial features with increased head circumference as well as increased finger soft-tissue thickness. Median serum IGF-1 concentrations were elevated, and 24-hour GH profile studies confirmed 2- to 3-fold increased median basal, pulsatile, and total GH secretion. Male Igsf1-deficient mice also demonstrated features of GH excess with increased lean mass, organ size, and skeletal dimensions and elevated mean circulating IGF-1 and pituitary GH levels.We demonstrate somatotrope neurosecretory hyperfunction in IGSF1-deficient humans and mice. These observations define a hitherto uncharacterized role for IGSF1 in somatotropes and indicate that patients with IGSF1 mutations should be evaluated for long-term consequences of increased GH exposure." @default.
• W2981645586 created "2019-11-01" @default.
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• W2981645586 date "2019-10-25" @default.
• W2981645586 modified "2023-10-16" @default.
• W2981645586 title "IGSF1 Deficiency Results in Human and Murine Somatotrope Neurosecretory Hyperfunction" @default.
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• W2981645586 doi "https://doi.org/10.1210/clinem/dgz093" @default.
• W2981645586 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/7108761" @default.
• W2981645586 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/31650157" @default.
• W2981645586 hasPublicationYear "2019" @default.
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