Abstract
Prolactin (PRL) is mainly produced by pituitary lactotrophs and is tonically inhibited by the hypothalamic neurotransmitter dopamine. Dopamine is produced by tuberoinfundibular dopaminergic neurons and released into the portal vessels of the pituitary stalk. It reaches the pituitary where it inhibits PRL secretion via dopamine receptors present on the surface of lactotrophs. The major isoform of PRL, 23 kDa PRL, acts via a membrane receptor, the prolactin receptor (PRLR), a member of the hematopoietic cytokine superfamily. Increased serum PRL, hyperprolactinemia, whatever its etiology, is the most common cause of hypogonadotropic anovulation in women and is frequently associated with hypogonadotropic hypogonadism in men. Hyperprolactinemia is also a cause of galactorrhea. Automated immunoassays for measuring serum PRL levels based on the sandwich principle are now widely available and are very simple to perform. However, potential artefacts in these assays, due to the “hook effect” or to the presence of high levels of macroprolactin, may lead to misdiagnosis and mismanagement of patients that could lead to unnecessary pituitary exploration, waste of healthcare resources, and unnecessary concern for both patient and clinician.
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References
Sinha YN. Structural variants of prolactin: occurrence and physiological significance. Endocr Rev. 1995;16:354–69.
Freeman ME, Kanyicska B, Lerant A, Nagy G. Prolactin: structure, function, and regulation of secretion. Physiol Rev. 2000;80(4):1523–631.
Walker AM. S179D prolactin: antagonistic agony! Mol Cell Endocrinol. 2007;276(1–2):1–9.
Williams VL, DeGuzman A, Dang H, et al. Common and specific effects of the two major forms of prolactin in the rat testis. Am J Physiol Endocrinol Metab. 2007;293(6):E1795–803.
Guitelman M, Colombani-Vidal ME, Zylbersztein CC, et al. Hyperprolactinemia in asymptomatic patients is related to high molecular weight posttranslational variants or glycosylated forms. Pituitary. 2002;5(4):255–60.
Mendez I, Vega C, Zamorano M, Moreno-Carranza B, Martinez DLE, Clapp C. Vasoinhibins and the pituitary gland. Front Horm Res. 2010;38:184–9.
Triebel J, Bertsch T, Bollheimer C, et al. Principles of the prolactin/vasoinhibin axis. Am J Physiol Regul Integr Comp Physiol. 2015;309(10):R1193–203.
Bernard V, Young J, Chanson P, Binart N. New insights in prolactin: pathological implications. Nat Rev Endocrinol. 2015;11(5):265–75.
Fahie-Wilson M, Smith TP. Determination of prolactin: the macroprolactin problem. Best Pract Res Clin Endocrinol Metab. 2013;27(5):725–42.
Riddle O, Bates RW, Dykshorn SW. The preparation, identification and assay of prolactin – a hormone of the anterior pituitary. Am J Physiol. 1933;105:191–216.
Frantz AG, Kleinberg DL. Prolactin: evidence that it is separate from growth hormone in human blood. Science. 1970;170(3959):745–7.
Shome B, Parlow AF. Human pituitary prolactin (hPRL): the entire linear amino acid sequence. J Clin Endocrinol Metab. 1977;45(5):1112–5.
Smith TP, Kavanagh L, Healy ML, McKenna TJ. Technology insight: measuring prolactin in clinical samples. Nat Clin Pract Endocrinol Metab. 2007;3(3):279–89.
Schulster D, Gaines Das RE, Jeffcoate SL. International standards for human prolactin: calibration by international collaborative study. J Endocrinol. 1989;121(1):157–66.
Glezer A, Soares CR, Vieira JG, et al. Human macroprolactin displays low biological activity via its homologous receptor in a new sensitive bioassay. J Clin Endocrinol Metab. 2006;91(3):1048–55.
Leanos-Miranda A, Cardenas-Mondragon G, Rivera-Leanos R, Ulloa-Aguirre A, Goffin V. Application of new homologous in vitro bioassays for human lactogens to assess the actual bioactivity of human prolactin isoforms in hyperprolactinaemic patients. Clin Endocrinol. 2006;65(2):146–53.
Guillou A, Romano N, Steyn F, et al. Assessment of lactotroph axis functionality in mice: longitudinal monitoring of PRL secretion by ultrasensitive-ELISA. Endocrinology. 2015;156(5):1924–30.
Ferguson J, Dougall T, Rigsby P, Burns C. Report of an international collaborative study of the proposed 4th international standard for prolactin, human. Geneva: World Health Organization, Expert Committee on Biological Standardization WHO/BS/; 2016.
Frieze TW, Mong DP, Koops MK. “Hook effect” in prolactinomas: case report and review of literature. Endocr Pract. 2002;8(4):296–303.
Barkan AL, Chandler WF. Giant pituitary prolactinoma with falsely low serum prolactin: the pitfall of the “high-dose hook effect”: case report. Neurosurgery. 1998;42(4):913–5.
Haller BL, Fuller KA, Brown WS, Koenig JW, Eveland BJ, Scott MG. Two automated prolactin immunoassays evaluated with demonstration of a high-dose “hook effect” in one. Clin Chem. 1992;38(3):437–8.
Petakov MS, Damjanovic SS, Nikolic-Durovic MM, et al. Pituitary adenomas secreting large amounts of prolactin may give false low values in immunoradiometric assays. The hook effect. J Endocrinol Investig. 1998;21(3):184–8.
Schofl C, Schofl-Siegert B, Karstens JH, et al. Falsely low serum prolactin in two cases of invasive macroprolactinoma. Pituitary. 2002;5(4):261–5.
St-Jean E, Blain F, Comtois R. High prolactin levels may be missed by immunoradiometric assay in patients with macroprolactinomas. Clin Endocrinol. 1996;44(3):305–9.
Mathis G. Rare earth cryptates and homogeneous fluoroimmunoassays with human sera. Clin Chem. 1993;39(9):1953–9.
Hattori N, Ishihara T, Ikekubo K, Moridera K, Hino M, Kurahachi H. Autoantibody to human prolactin in patients with idiopathic hyperprolactinemia. J Clin Endocrinol Metab. 1992;75(5):1226–9.
Vallette-Kasic S, Morange-Ramos I, Selim A, et al. Macroprolactinemia revisited: a study on 106 patients. J Clin Endocrinol Metab. 2002;87(2):581–8.
Leslie H, Courtney CH, Bell PM, et al. Laboratory and clinical experience in 55 patients with macroprolactinemia identified by a simple polyethylene glycol precipitation method. J Clin Endocrinol Metab. 2001;86(6):2743–6.
Fahie-Wilson MN, Soule SG. Macroprolactinaemia: contribution to hyperprolactinaemia in a district general hospital and evaluation of a screening test based on precipitation with polyethylene glycol. Ann Clin Biochem. 1997;34(Pt 3):252–8.
Jackson RD, Wortsman J, Malarkey WB. Macroprolactinemia presenting like a pituitary tumor. Am J Med. 1985;78(2):346–50.
Hattori N, Inagaki C. Anti-prolactin (PRL) autoantibodies cause asymptomatic hyperprolactinemia: bioassay and clearance studies of PRL-immunoglobulin G complex. J Clin Endocrinol Metab. 1997;82(9):3107–10.
Hattori N, Nakayama Y, Kitagawa K, Ishihara T, Saiki Y, Inagaki C. Anti-prolactin (PRL) autoantibody-binding sites (epitopes) on PRL molecule in macroprolactinemia. J Endocrinol. 2006;190(2):287–93.
Smith TP, Suliman AM, Fahie-Wilson MN, McKenna TJ. Gross variability in the detection of prolactin in sera containing big big prolactin (macroprolactin) by commercial immunoassays. J Clin Endocrinol Metab. 2002;87(12):5410–5.
Leite V, Cosby H, Sobrinho LG, Fresnoza MA, Santos MA, Friesen HG. Characterization of big, big prolactin in patients with hyperprolactinaemia. Clin Endocrinol. 1992;37(4):365–72.
De Schepper J, Schiettecatte J, Velkeniers B, et al. Clinical and biological characterization of macroprolactinemia with and without prolactin-IgG complexes. Eur J Endocrinol. 2003;149(3):201–7.
Hattori N, Nakayama Y, Kitagawa K, Ishihara T, Saiki Y, Inagaki C. Anti-prolactin (PRL) autoantibodies suppress PRL bioactivity in patients with macroprolactinaemia. Clin Endocrinol. 2008;68(1):72–6.
Leanos-Miranda A, Pascoe-Lira D, Chavez-Rueda KA, Blanco-Favela F. Persistence of macroprolactinemia due to antiprolactin autoantibody before, during, and after pregnancy in a woman with systemic lupus erythematosus. J Clin Endocrinol Metab. 2001;86(6):2619–24.
Kavanagh L, Smith TP, McKenna TJ. Bioactivity of macroprolactin in the Nb2 bioassay may be explained by dissociation yielding bioactive monomeric prolactin. Clin Endocrinol. 2007;67(6):954.
Gibney J, Smith TP, McKenna TJ. The impact on clinical practice of routine screening for macroprolactin. J Clin Endocrinol Metab. 2005;90(7):3927–32.
Suliman AM, Smith TP, Gibney J, McKenna TJ. Frequent misdiagnosis and mismanagement of hyperprolactinemic patients before the introduction of macroprolactin screening: application of a new strict laboratory definition of macroprolactinemia. Clin Chem. 2003;49(9):1504–9.
Schlechte JA. The macroprolactin problem. J Clin Endocrinol Metab. 2002;87(12):5408–9.
Fahie-Wilson MN, Ahlquist JA. Hyperprolactinaemia due to macroprolactins: some progress but still a problem. Clin Endocrinol. 2003;58(6):683–5.
Olukoga AO, Kane JW. Macroprolactinaemia: validation and application of the polyethylene glycol precipitation test and clinical characterization of the condition. Clin Endocrinol. 1999;51(1):119–26.
Heaney AP, Laing I, Walton L, Seif MW, Beardwell CG, Davis JR. Misleading hyperprolactinaemia in pregnancy. Lancet. 1999;353(9154):720.
Guay AT, Sabharwal P, Varma S, Malarkey WB. Delayed diagnosis of psychological erectile dysfunction because of the presence of macroprolactinemia. J Clin Endocrinol Metab. 1996;81(7):2512–4.
Cattaneo FA, Fahie-Wilson MN. Concomitant occurrence of macroprolactin, exercise-induced amenorrhea, and a pituitary lesion: a diagnostic pitfall. Case report. J Neurosurg. 2001;95(2):334–7.
Ichihara K, Miyai K. Detection of asymptomatic prolactinoma by a mass screening program. Rinsho Byori. 1990;38(6):667–74.
Bjoro T, Morkrid L, Wergeland R, et al. Frequency of hyperprolactinaemia due to large molecular weight prolactin (150–170 kD PRL). Scand J Clin Lab Invest. 1995;55(2):139–47.
Gibney J, Smith TP, McKenna TJ. Clinical relevance of macroprolactin. Clin Endocrinol. 2005;62(6):633–43.
Chahal J, Schlechte J. Hyperprolactinemia. Pituitary. 2008;11(2):141–6.
Hattori N, Ikekubo K, Ishihara T, Moridera K, Hino M, Kurahachi H. A normal ovulatory woman with hyperprolactinemia: presence of anti-prolactin autoantibody and the regulation of prolactin secretion. Acta Endocrinol. 1992;126(6):497–500.
Beltran L, Fahie-Wilson MN, McKenna TJ, Kavanagh L, Smith TP. Serum total prolactin and monomeric prolactin reference intervals determined by precipitation with polyethylene glycol: evaluation and validation on common immunoassay platforms. Clin Chem. 2008;54(10):1673–81.
McKenna TJ. Should macroprolactin be measured in all hyperprolactinaemic sera? Clin Endocrinol. 2009;71(4):466–9.
Kavanagh L, McKenna TJ, Fahie-Wilson MN, Gibney J, Smith TP. Specificity and clinical utility of methods for the detection of macroprolactin. Clin Chem. 2006;52(7):1366–72.
Fang VS, Refetoff S. Heterogeneous human prolactin from a giant pituitary tumor in a patient with panhypopituitarism. J Clin Endocrinol Metab. 1978;47(4):780–7.
Andersen AN, Pedersen H, Djursing H, Andersen BN, Friesen HG. Bioactivity of prolactin in a woman with an excess of large molecular size prolactin, persistent hyperprolactinemia and spontaneous conception. Fertil Steril. 1982;38(5):625–8.
Fraser IS, Lun ZG, Zhou JP, et al. Detailed assessment of big big prolactin in women with hyperprolactinemia and normal ovarian function. J Clin Endocrinol Metab. 1989;69(3):585–92.
Levinson SS, Miller JJ. Towards a better understanding of heterophile (and the like) antibody interference with modern immunoassays. Clin Chim Acta. 2002;325(1–2):1–15.
Kricka LJ, Schmerfeld-Pruss D, Senior M, Goodman DB, Kaladas P. Interference by human anti-mouse antibody in two-site immunoassays. Clin Chem. 1990;36(6):892–4.
Madry N, Auerbach B, Schelp C. Measures to overcome HAMA interferences in immunoassays. Anticancer Res. 1997;17(4B):2883–6.
Nussbaum S, Roth HJ. Human anti-mouse antibodies: pitfalls in tumor marker measurement and strategies for enhanced assay robustness; including results with Elecsys CEA. Anticancer Res. 2000;20(6D):5249–52.
Sapin R, Simon C. False hyperprolactinemia corrected by the use of heterophilic antibody-blocking agent. Clin Chem. 2001;47(12):2184–5.
Al-Salameh A, Becquemont L, Brailly-Tabard S, Aubourg P, Chanson P. A somewhat bizarre case of graves disease due to vitamin treatment. J Endocrinol Soc. 2017;1(5):431–5.
Li D, Radulescu A, Shrestha RT, et al. Association of biotin ingestion with performance of hormone and nonhormone assays in healthy adults. JAMA. 2017;318(12):1150–60.
Piketty ML, Prie D, Sedel F, et al. High-dose biotin therapy leading to false biochemical endocrine profiles: validation of a simple method to overcome biotin interference. Clin Chem Lab Med. 2017;55(6):817–25.
Casanueva FF, Molitch ME, Schlechte JA, et al. Guidelines of the pituitary society for the diagnosis and management of prolactinomas. Clin Endocrinol. 2006;65(2):265–73.
Melmed S, Casanueva FF, Hoffman AR, et al. Diagnosis and treatment of hyperprolactinemia: an Endocrine Society clinical practice guideline. J Clin Endocrinol Metab. 2011;96(2):273–88.
Swearingen KC. Heterogeneous turnover of adenohypophysial prolactin. Endocrinology. 1971;89(6):1380–8.
Walker AM, Farquhar MG. Preferential release of newly synthesized prolactin granules is the result of functional heterogeneity among mammotrophs. Endocrinology. 1980;107(4):1095–104.
Jacobs LS, Lorenson MY. Cysteamine, zinc, and thiols modify detectability of rat pituitary prolactin: a comparison with effects on bovine prolactin suggests differences in hormone storage. Metabolism. 1986;35(3):209–15.
Everett JW. Luteotropic function of autografts of the rat hypophysis. Endocrinology. 1954;54(6):685–90.
Ben-Jonathan N, Hnasko R. Dopamine as a prolactin (PRL) inhibitor. Endocr Rev. 2001;22(6):724–63.
Schuff KG, Hentges ST, Kelly MA, et al. Lack of prolactin receptor signaling in mice results in lactotroph proliferation and prolactinomas by dopamine-dependent and -independent mechanisms. J Clin Invest. 2002;110:973–81.
Bosse R, Fumagalli F, Jaber M, et al. Anterior pituitary hypoplasia and dwarfism in mice lacking the dopamine transporter. Neuron. 1997;19(1):127–38.
Quigley ME, Judd SJ, Gilliland GB, Yen SS. Functional studies of dopamine control of prolactin secretion in normal women and women with hyperprolactinemic pituitary microadenoma. J Clin Endocrinol Metab. 1980;50(6):994–8.
Levinson PD, Goldstein DS, Munson PJ, Gill JR Jr, Keiser HR. Endocrine, renal, and hemodynamic responses to graded dopamine infusions in normal men. J Clin Endocrinol Metab. 1985;60(5):821–6.
Molitch ME. Drugs and prolactin. Pituitary. 2008;11(2):209–18.
Nikolics K, Mason AJ, Szonyi E, Ramachandran J, Seeburg PH. A prolactin-inhibiting factor within the precursor for human gonadotropin-releasing hormone. Nature. 1985;316(6028):511–7.
Bouligand J, Ghervan C, Tello JA, et al. Isolated familial hypogonadotropic hypogonadism and a GNRH1 mutation. N Engl J Med. 2009;360(26):2742–8.
Cattanach BM, Iddon CA, Charlton HM, Chiappa SA, Fink G. Gonadotrophin-releasing hormone deficiency in a mutant mouse with hypogonadism. Nature. 1977;269(5626):338–40.
Charlton HM, Speight A, Halpin DM, Bramwell A, Sheward WJ, Fink G. Prolactin measurements in normal and hypogonadal (hpg) mice: developmental and experimental studies. Endocrinology. 1983;113(2):545–8.
Catalano PN, Bonaventura MM, Silveyra P, Bettler B, Libertun C, Lux-Lantos VA. GABA(B1) knockout mice reveal alterations in prolactin levels, gonadotropic axis, and reproductive function. Neuroendocrinology. 2005;82(5–6):294–305.
Koch Y, Goldhaber G, Fireman I, Zor U, Shani J, Tal E. Suppression of prolactin and thyrotropin secretion in the rat by antiserum to thyrotropin-releasing hormone. Endocrinology. 1977;100(5):1476–8.
Yamada M, Saga Y, Shibusawa N, et al. Tertiary hypothyroidism and hyperglycemia in mice with targeted disruption of the thyrotropin-releasing hormone gene. Proc Natl Acad Sci U S A. 1997;94(20):10862–7.
Bonomi M, Busnelli M, Beck-Peccoz P, et al. A family with complete resistance to thyrotropin-releasing hormone. N Engl J Med. 2009;360(7):731–4.
Grattan DR. 60 years of neuroendocrinology: the hypothalamo-prolactin axis. J Endocrinol. 2015;226(2):T101–22.
Andrews ZB, Grattan DR. The roles of dopamine and the neurointermediate lobe of the pituitary in the regulation of prolactin secretion during late pregnancy in rats. J Neuroendocrinol. 2004;16(10):859–65.
Horseman ND, Buntin JD. Regulation of pigeon cropmilk secretion and parental behaviors by prolactin. Annu Rev Nutr. 1995;15:213–38.
Murai I, Reichlin S, Ben-Jonathan N. The peak phase of the proestrous prolactin surge is blocked by either posterior pituitary lobectomy or antisera to vasoactive intestinal peptide. Endocrinology. 1989;124(2):1050–5.
Grattan DR, Le Tissier P. Hypothalamic control of prolactin secretion, and the multiple reproductive functions of prolactin. In: Plant TM, Zelesnik AJ, editors. Knobil and Neill’s physiology of reproduction. 4th ed. Amsterdam: Elsevier; 2015. p. 469–526.
Arey BJ, Averill RL, Freeman ME. A sex-specific endogenous stimulatory rhythm regulating prolactin secretion. Endocrinology. 1989;124(1):119–23.
Arey BJ, Freeman ME. Activity of vasoactive intestinal peptide and serotonin in the paraventricular nucleus reflects the periodicity of the endogenous stimulatory rhythm regulating prolactin secretion. Endocrinology. 1992;131(2):736–42.
Arey BJ, Freeman ME. Activity of oxytocinergic neurons in the paraventricular nucleus mirrors the periodicity of the endogenous stimulatory rhythm regulating prolactin secretion. Endocrinology. 1992;130(1):126–32.
Arey BJ, Freeman ME. Oxytocin, vasoactive-intestinal peptide, and serotonin regulate the mating-induced surges of prolactin secretion in the rat. Endocrinology. 1990;126(1):279–84.
Murai I, Ben-Jonathan N. Posterior pituitary lobectomy abolishes the suckling-induced rise in prolactin (PRL): evidence for a PRL-releasing factor in the posterior pituitary. Endocrinology. 1987;121(1):205–11.
Murai I, Ben-Jonathan N. Acute stimulation of prolactin release by estradiol: mediation by the posterior pituitary. Endocrinology. 1990;126(6):3179–84.
Samson WK, Martin L, Mogg RJ, Fulton RJ. A nonoxytocinergic prolactin releasing factor and a nondopaminergic prolactin inhibiting factor in bovine neurointermediate lobe extracts: in vitro and in vivo studies. Endocrinology. 1990;126(3):1610–7.
Averill RL, Grattan DR, Norris SK. Posterior pituitary lobectomy chronically attenuates the nocturnal surge of prolactin in early pregnancy. Endocrinology. 1991;128(2):705–9.
Romano N, Yip SH, Hodson DJ, et al. Plasticity of hypothalamic dopamine neurons during lactation results in dissociation of electrical activity and release. J Neurosci. 2013;33(10):4424–33.
Grattan DR, Kokay IC. Prolactin: a pleiotropic neuroendocrine hormone. J Neuroendocrinol. 2008;20(6):752–63.
Brown RS, Piet R, Herbison AE, Grattan DR. Differential actions of prolactin on electrical activity and intracellular signal transduction in hypothalamic neurons. Endocrinology. 2012;153(5):2375–84.
Lyons DJ, Hellysaz A, Broberger C. Prolactin regulates tuberoinfundibular dopamine neuron discharge pattern: novel feedback control mechanisms in the lactotrophic axis. J Neurosci. 2012;32(23):8074–83.
Cruz-Soto ME, Scheiber MD, Gregerson KA, Boivin GP, Horseman ND. Pituitary tumorigenesis in prolactin gene-disrupted mice. Endocrinology. 2002;143(11):4429–36.
Horseman ND, Zhao W, Montecino-Rodriguez E, et al. Defective mammopoiesis, but normal hematopoiesis, in mice with a targeted disruption of the prolactin gene. EMBO J. 1997;16(23):6926–35.
Bernard V, Lamothe S, Beau I, et al. Autocrine actions of prolactin contribute to the regulation of lactotroph function in vivo. FASEB J. 2018;32:4791–7; fj201701111RR.
Hodson DJ, Schaeffer M, Romano N, et al. Existence of long-lasting experience-dependent plasticity in endocrine cell networks. Nat Commun. 2012;3:605.
MohanKumar PS, MohanKumar SM, Quadri SK, Voogt JL. Effects of chronic bromocriptine treatment on tyrosine hydroxylase (TH) mRNA expression, TH activity and median eminence dopamine concentrations in ageing rats. J Neuroendocrinol. 2001;13(3):261–9.
Le Tissier P, Campos P, Lafont C, Romano N, Hodson DJ, Mollard P. An updated view of hypothalamic-vascular-pituitary unit function and plasticity. Nat Rev Endocrinol. 2017;13(5):257–67.
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Binart, N., Young, J., Chanson, P. (2019). Prolactin Assays and Regulation of Secretion: Animal and Human Data. In: Tritos, N., Klibanski, A. (eds) Prolactin Disorders. Contemporary Endocrinology. Humana, Cham. https://doi.org/10.1007/978-3-030-11836-5_3
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