{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,18]],"date-time":"2026-09-18T22:57:28Z","timestamp":1789772248537,"version":"4.0.1"},"reference-count":49,"publisher":"American Medical Association (AMA)","issue":"6","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["JAMA Pediatr"],"published-print":{"date-parts":[[2024,6,1]]},"abstract":"\n Importance<\/jats:title>\n Perinatal stress and fetal growth restriction increase the risk of neonatal hypoglycemia. The underlying pathomechanism is poorly understood. In a sheep model, elevated catecholamine concentrations were found to suppress intrauterine insulin secretion, followed by hyperresponsive insulin secretion once the adrenergic stimulus subsided.<\/jats:p>\n <\/jats:sec>\n \n Objective<\/jats:title>\n To determine whether neonates with risk factors for hypoglycemia have higher catecholamine concentrations in umbilical cord blood (UCB) and\/or amniotic fluid (AF) and whether catecholamines are correlated with postnatal glycemia.<\/jats:p>\n <\/jats:sec>\n \n Design, Setting, and Participants<\/jats:title>\n In a prospective cohort study of 328 neonates at a tertiary perinatal center from September 2020 through May 2022 in which AF and UCB were collected immediately during and after delivery, catecholamines and metanephrines were analyzed using liquid chromatography with tandem mass spectrometry. Participants received postnatal blood glucose (BG) screenings.<\/jats:p>\n <\/jats:sec>\n \n Exposure<\/jats:title>\n Risk factor for neonatal hypoglycemia.<\/jats:p>\n <\/jats:sec>\n \n Main Outcomes and Measures<\/jats:title>\n Comparison of catecholamine and metanephrine concentrations between at-risk neonates and control participants, and correlation of concentrations of catecholamines and metanephrines with the number and severity of postnatal hypoglycemic episodes.<\/jats:p>\n <\/jats:sec>\n \n Results<\/jats:title>\n \n In this study of 328 neonates (234 in the risk group: median [IQR] gestational age, 270 [261-277] days; and 94 in the control group: median [IQR] gestational age, 273 [270-278] days), growth-restricted neonates showed increased UCB median (IQR) concentrations of norepinephrine (21.10 [9.15-42.33] vs 10.88 [5.78-18.03] nmol\/L;\n P<\/jats:italic>\n \u2009&amp;lt;\u2009.001), metanephrine (0.37 [0.13-1.36] vs 0.12 [0.08-0.28] nmol\/L;\n P<\/jats:italic>\n \u2009&amp;lt;\u2009.001), and 3-methoxytyramine (0.149 [0.098-0.208] vs 0.091 [0.063-0.149] nmol\/L;\n P<\/jats:italic>\n \u2009=\u2009.001). Neonates with perinatal stress had increased UCB median (IQR) concentrations of norepinephrine (22.55 [8.99-131.66] vs 10.88 [5.78-18.03] nmol\/L;\n P<\/jats:italic>\n \u2009=\u2009.001), normetanephrine (1.75 [1.16-4.93] vs 1.25 [0.86-2.56] nmol\/L;\n P<\/jats:italic>\n \u2009=\u2009.004), and 3-methoxytyramine (0.120 [0.085-0.228] vs 0.091 [0.063-0.149] nmol\/L;\n P<\/jats:italic>\n \u2009=\u2009.008) (\n P<\/jats:italic>\n \u2009&amp;lt;\u2009.0083 was considered statistically significant). Concentrations of UCB norepinephrine, metanephrine, and 3-methoxytyramine were negatively correlated with AF C-peptide concentration (\n r<\/jats:italic>\n s<\/jats:sub>\n \u2009=\u2009\u22120.212,\n P<\/jats:italic>\n \u2009=\u2009.005;\n r<\/jats:italic>\n s<\/jats:sub>\n \u2009=\u2009\u22120.182,\n P<\/jats:italic>\n \u2009=\u2009.016; and\n r<\/jats:italic>\n s<\/jats:sub>\n \u2009=\u2009\u22120.183,\n P<\/jats:italic>\n \u2009=\u2009.016, respectively [\n P<\/jats:italic>\n \u2009&amp;lt;\u2009.017 was considered statistically significant]). Concentrations of UCB norepinephrine, metanephrine, and 3-methoxytyramine were positively correlated with the number of hypoglycemic episodes (BG concentration of 30-45 mg\/dL) (\n r<\/jats:italic>\n s<\/jats:sub>\n \u2009=\u20090.146,\n P<\/jats:italic>\n \u2009=\u2009.01;\n r<\/jats:italic>\n s<\/jats:sub>\n \u2009=\u20090.151,\n P<\/jats:italic>\n \u2009=\u2009.009; and\n r<\/jats:italic>\n s<\/jats:sub>\n \u2009=\u20090.180,\n P<\/jats:italic>\n \u2009=\u2009.002, respectively). Concentrations of UCB metanephrine and 3-methoxytyramine were negatively correlated with the lowest measured BG concentration (\n r<\/jats:italic>\n s<\/jats:sub>\n \u2009=\u2009\u22120.149,\n P<\/jats:italic>\n \u2009=\u2009.01; and\n r<\/jats:italic>\n s<\/jats:sub>\n \u2009=\u2009\u22120.153,\n P<\/jats:italic>\n \u2009=\u2009.008, respectively).\n <\/jats:p>\n <\/jats:sec>\n \n Conclusions and Relevance<\/jats:title>\n Neonates at risk for hypoglycemia displayed increased catecholamine and metanephrine concentrations that were correlated with postnatal hypoglycemic episodes and lower BG levels; these results are consistent with findings in a sheep model that fetal catecholamines are associated with neonatal \u03b2-cell physiology and that perinatal stress or growth restriction is associated with subsequent neonatal hyperinsulinemic hypoglycemia. Improving the pathomechanistic understanding of neonatal hypoglycemia may help to guide management of newborns at risk for hypoglycemia.<\/jats:p>\n <\/jats:sec>","DOI":"10.1001\/jamapediatrics.2024.0304","type":"journal-article","created":{"date-parts":[[2024,4,1]],"date-time":"2024-04-01T11:00:53Z","timestamp":1711969253000},"page":"577","source":"Crossref","is-referenced-by-count":16,"title":["Association of Fetal Catecholamines With Neonatal Hypoglycemia"],"prefix":"10.1001","volume":"178","author":[{"given":"Henrike","family":"Hoermann","sequence":"first","affiliation":[{"name":"Department of General Pediatrics, Neonatology and Pediatric Cardiology, Medical Faculty, University Hospital D\u00fcsseldorf, Heinrich Heine University, D\u00fcsseldorf, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Martijn","family":"van Faassen","sequence":"additional","affiliation":[{"name":"Department of Laboratory Medicine, University of Groningen, University Medical Center 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