Hyperprolactinemia: new assay more specific for the monomeric form does not eliminate screening for macroprolactin with polyethylene glycol precipitation
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چکیده
منابع مشابه
Hyperprolactinemia: new assay more specific for the monomeric form does not eliminate screening for macroprolactin with polyethylene glycol precipitation.
Prolactin presents important size heterogeneity in terms of circulating molecular forms. Besides the monomer (23kDa), which predominates in healthy subjects as well as in patients with prolactinoma, high molecular forms are also present in low concentrations (1). These high molecular forms include 50 kDa dimers (big prolactin) and also forms with even larger molecular weights (MW>150 kDa), know...
متن کاملMacroprolactin detection by precipitation with protein A-sepharose: a rapid screening method compared with polyethylene glycol precipitation.
within 21 days. The likelihood ratio for a negative result [(1 sensitivity)/specificity] was 0.59 for birth within 7 days, 0.68 for birth within 14 days, and 0.53 for birth within 21 days. The data in Table 1 are similar to those obtained in previous studies using the ELISA-based assay. Joffe et al. (1 ) reported a NPV of 99.6% and a PPV of 9.1% for 243 patients who delivered within 7 days with...
متن کاملUltrafiltration – an alternative method to polyethylene glycol precipitation for macroprolactin detection
INTRODUCTION The aim of the study was to evaluate two methods of macroprolactin (MaPRL) detection - precipitation with polyethylene glycol (PEG) and ultrafiltration and to compare these techniques with "gold standard" - gel filtration chromatography (GFC). MATERIAL AND METHODS The study was conducted on 245 patients - 45 with organic and 200 with functional hyperprolactinaemia. In all the sub...
متن کاملPolyethylene glycol precipitation as a screening method for macroprolactinemia.
To the Editor: Vieira et al. (1) used the Wallac Delfia immunofluorometric assay to demonstrate that macroprolactin is a common cause of apparent hyperprolactinemia, and this confirms our experience (2) and that of others (3). However, their data validating the polyethylene glycol (PEG) precipitation as a screening method for detecting macroprolactinemia are substantially different than ours (2...
متن کاملIn hyperprolactinemia, testing for macroprolactin is essential.
Autonomous secretion of prolactin (PRL) by a pituitary prolactinoma is a relatively common endocrine disorder characterized by increased serum concentrations of PRL and symptoms of menstrual irregularity, infertility, and galactorrhea in women and impotence and lack of libido in men (1 ). These clinical symptoms are common, and measurement of serum PRL is a key investigation used to identify th...
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ژورنال
عنوان ژورنال: Arquivos Brasileiros de Endocrinologia & Metabologia
سال: 2010
ISSN: 0004-2730
DOI: 10.1590/s0004-27302010000900013