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  • Title: Plasma 7B2 (a novel pituitary protein) immunoreactivity concentrations in patients with various endocrine disorders.
    Author: Natori S, Iguchi H, Ohashi M, Nawata H.
    Journal: Endocrinol Jpn; 1988 Aug; 35(4):651-4. PubMed ID: 2850908.
    Abstract:
    We have measured plasma 7B2 (a novel pituitary protein)-immunoreactivity (IR) concentrations in patients with various endocrine disorders. Mean (+/- SEM) basal plasma 7B2-IR concentrations (ng/L) in patients with acromegaly (81 +/- 14.6), Cushing's disease (57.2 +/- 8.5), prolactinoma (71.4 +/- 9.5), panhypopituitarism (50.6 +/- 7.6), isolated ACTH deficiency (47.9 +/- 11.6), hyperthyroidism (57.9 +/- 6.7) and hypothyroidism (60.8 +/- 9.4) were on the same levels as those in age-matched normal subjects. However, basal plasma 7B2-IR concentrations were increased to more than 100 ng/L in 5 out of 25 patients with acromegaly (20%). Mean basal plasma 7B2-IR concentrations in patients with medullary carcinoma of the thyroid and pheochromocytoma were 293 +/- 38.1 ng/L (range: 225.7-357.4 ng/L, n = 3) and 221 +/- 82.8 ng/L (range: 48.5-527.8 ng/L, n = 5), respectively, and significantly higher than those in age-matched normal subjects (P less than 0.001). These results suggest that plasma 7B2-IR may have some diagnostic value for acromegaly and may be useful as a marker for medullary carcinoma of the thyroid and pheochromocytoma.
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