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The hook effect refers to the prozone phenomenon, also known as antibody excess, or the postzone phenomenon, also known as antigen excess. It is an immunologic phenomenon whereby the effectiveness of antibodies to form immune complexes can be impaired when concentrations of an antibody or an antigen are very high.
If Hook Effect is suspected in the patient diagnosis, serial dilution of the analyte until the concentration of prolactin falls within the assay's analytical measurements is suggested. Ruling out the possibilities of false negative is important to ensure patients receive necessary care for their conditions.
Prolactin (PRL), also known as lactotropin and mammotropin, is a protein best known for its role in enabling mammals to produce milk. It is influential in over 300 separate processes in various vertebrates, including humans. [5] Prolactin is secreted from the pituitary gland in response to eating, mating, estrogen treatment, ovulation and ...
Cabergoline is primarily used to treat disorders related to high levels of the hormone prolactin, which is produced by the pituitary gland. In women, prolactin is the hormone that regulates milk ...
Opioids have antigonadotropic effects and can reduce luteinizing hormone and testosterone levels in men. [ 11 ] [ 12 ] [ 13 ] A 2015 systematic review and meta-analysis found that opioid therapy decreased testosterone levels in men by about 165 ng/dL (5.7 nmol/L) on average, which was a reduction in testosterone level of almost 50%. [ 11 ]
Side effects are mostly dose dependent. Much more severe side effects are reported for treatment of Parkinson's disease and (off-label treatment) for restless leg syndrome which both typically require very high doses. The side effects are considered mild when used for treatment of hyperprolactinemia and other endocrine disorders or gynecologic ...
A prolactin cell (also known as a lactotropic cell, epsilon acidophil, lactotrope, lactotroph, mammatroph, mammotroph) is a cell in the anterior pituitary which produces prolactin (a peptide hormone) in response to hormonal signals including dopamine (which is inhibitory), thyrotropin-releasing hormone and estrogen (especially during pregnancy), which are stimulatory.
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