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Liu J, Yang T, Li Y, Li S, Li Y, Xu S, Xia W. Associations of maternal exposure to 2,4-dichlorophenoxyacetic acid during early pregnancy with steroid hormones among one-month-old infants. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 912:169414. [PMID: 38114038 DOI: 10.1016/j.scitotenv.2023.169414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2023] [Revised: 12/12/2023] [Accepted: 12/13/2023] [Indexed: 12/21/2023]
Abstract
BACKGROUND Exposure to 2,4-dichlorophenoxyacetic acid (2,4-D), a widely used hormonal herbicide, may disrupt steroid hormone homeostasis. However, evidence from population-based studies is limited, especially for one-month-old infants whose steroid hormones are in a state of adjustment to extrauterine life and can be important indicators of endocrine development. This study aimed to explore the associations between maternal 2,4-D exposure during early pregnancy and infant steroid hormone levels. METHODS The 885 mother-infant pairs were from a birth cohort in Wuhan, China. Maternal exposure to 2,4-D was determined in urine samples from early pregnancy, and nine steroid hormones were determined in infant urine. The associations of maternal 2,4-D exposure with infant steroid hormones and their product-to-precursor ratios were estimated based on generalized linear models, and bioinformatic analysis was conducted with public databases to explore the potential mechanisms involved. RESULTS The detection frequency of 2,4-D was 99.32 %, and the detection frequency of steroid hormones ranged from 98.42 % to 100.00 %. After adjusting for covariates, an interquartile range increase in 2,4-D concentrations was associated with a 7.84 % decrease in 11-deoxycortisol (95 % confidence interval, CI: -14.12 %, -1.10 %), an 8.09 % decrease in corticosterone (95 % CI: -14.56 %, -1.14 %), an 8.67 % decrease in cortisol (95 % CI: -14.43 %, -2.52 %), a 13.00 % decrease in cortisone (95 % CI: -20.64 %, -4.62 %), and an 11.17 % decrease in aldosterone (95 % CI: -19.62 %, -1.83 %). Maternal 2,4-D was also associated with lower infant cortisol/17α-OH-progesterone, cortisol/pregnenolone, and aldosterone/pregnenolone ratios. In bioinformatic analysis, pathways/biological processes related to steroid hormone synthesis and secretion were enriched from target genes of 2,4-D exposure. CONCLUSIONS Maternal urinary 2,4-D during early pregnancy was associated with lower infant urinary 11-deoxycortisol, corticosterone, cortisol, cortisone, and aldosterone, reflecting that 2,4-D exposure may interfere with infant steroid hormone homeostasis. Further efforts are still needed to study the relevant health effects of exposure to 2,4-D, particularly for vulnerable populations.
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Affiliation(s)
- Jiangtao Liu
- Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Tingting Yang
- Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Ying Li
- Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, 1068 Xueyuan Avenue, Shenzhen 518055, Guangdong Province, China
| | - Shulan Li
- Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Yuanyuan Li
- Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Shunqing Xu
- Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Wei Xia
- Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China.
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Lewis P, Wild U, Pillow JJ, Foster RG, Erren TC. A systematic review of chronobiology for neonatal care units: What we know and what we should consider. Sleep Med Rev 2024; 73:101872. [PMID: 38000120 DOI: 10.1016/j.smrv.2023.101872] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Accepted: 11/02/2023] [Indexed: 11/26/2023]
Abstract
A Cochrane 2016 review indicated cycled light might benefit neonatal health in hospital. We systematically reviewed chronobiological factors for neonatal health in hospital units, identifying 56 relevant studies on light-dark cycles, feeding, noise, massage therapy, rooming-in, incubators vs. cribs, neonatal units vs. homes, and time-of-day of birth. Empirical evidence for benefits from chronobiology is weaker than expected, including light. Mechanisms of clinical benefits are unclear (e.g., changes to sleep/activity vs. other circadian-regulated processes). Regarding light, studies concerning sleep and circadian-related outcomes predominate; yet, neonatologists may be more interested in weight gain and time spent in hospital. Generalisability of findings is limited as most studies targeted neonates in stable condition and without congenital anomalies. Further research is needed, in particular concerning potential circadian entraining signals such as timing of meals or medications. Longer-term outcomes (regarding e.g., neurodevelopment and infection), and who may be at risk from time-of-day of birth effects and why remain to be explored. Overall, there is promise and ample scope for research into how chronobiological factors affect health in hospitalised neonates.
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Affiliation(s)
- Philip Lewis
- Institute and Policlinic for Occupational Medicine, Environmental Medicine and Prevention Research, University Hospital of Cologne, Cologne, Germany.
| | - Ursula Wild
- Institute and Policlinic for Occupational Medicine, Environmental Medicine and Prevention Research, University Hospital of Cologne, Cologne, Germany
| | - J Jane Pillow
- School of Human Sciences, The University of Western Australia and Telethon Kids Institute, Perth, Western Australia, Australia; Telethon Kids Institute, Perth, Western Australia, Australia
| | - Russell G Foster
- Sir Jules Thorn Sleep and Circadian Neuroscience Institute, Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, UK
| | - Thomas C Erren
- Institute and Policlinic for Occupational Medicine, Environmental Medicine and Prevention Research, University Hospital of Cologne, Cologne, Germany
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Hoeben H, Alferink MT, van Kempen AAMW, van Goudoever JB, van Veenendaal NR, van der Schoor SRD. Collaborating to Improve Neonatal Care: ParentAl Participation on the NEonatal Ward-Study Protocol of the neoPARTNER Study. CHILDREN (BASEL, SWITZERLAND) 2023; 10:1482. [PMID: 37761442 PMCID: PMC10527908 DOI: 10.3390/children10091482] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2023] [Revised: 08/09/2023] [Accepted: 08/29/2023] [Indexed: 09/29/2023]
Abstract
Parents are often appointed a passive role in the care for their hospitalised child. In the family-integrated care (FICare) model, parental involvement in neonatal care is emulated. Parental participation in medical rounds, or family-centred rounds (FCR), forms a key element. A paucity remains of randomised trials assessing the outcomes of FCR (embedded in FICare) in families and neonates, and outcomes on an organisational level are relatively unexplored. Likewise, biological mechanisms through which a potential effect may be exerted are lacking robust evidence. Ten level two Dutch neonatal wards are involved in this stepped-wedge cluster-randomised trial FCR (embedded in FICare) by one common implementation strategy. Parents of infants hospitalised for at least 7 days are eligible for inclusion. The primary outcome is parental stress (PSS:NICU) at discharge. Secondary outcomes include parental, neonatal, healthcare professional and organisational outcomes. Biomarkers of stress will be analysed in parent-infant dyads. With a practical approach and broad outcome set, this study aims to obtain evidence on the possible (mechanistic) effect of FCR (as part of FICare) on parents, infants, healthcare professionals and organisations. The practical approach provides (experiences of) FICare material adjusted to the Dutch setting, available for other hospitals after the study.
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Affiliation(s)
- Hannah Hoeben
- Department of Paediatrics/Neonatology, OLVG, 1091 AC Amsterdam, The Netherlands; (H.H.); (M.T.A.); (A.A.M.W.v.K.); (N.R.v.V.)
- Department of Paediatrics, Emma Children’s Hospital, Amsterdam UMC, Vrije Universiteit Amsterdam, 1105 AZ Amsterdam, The Netherlands;
| | - Milène T. Alferink
- Department of Paediatrics/Neonatology, OLVG, 1091 AC Amsterdam, The Netherlands; (H.H.); (M.T.A.); (A.A.M.W.v.K.); (N.R.v.V.)
- Department of Paediatrics, Emma Children’s Hospital, Amsterdam UMC, Vrije Universiteit Amsterdam, 1105 AZ Amsterdam, The Netherlands;
| | - Anne A. M. W. van Kempen
- Department of Paediatrics/Neonatology, OLVG, 1091 AC Amsterdam, The Netherlands; (H.H.); (M.T.A.); (A.A.M.W.v.K.); (N.R.v.V.)
| | - Johannes B. van Goudoever
- Department of Paediatrics, Emma Children’s Hospital, Amsterdam UMC, Vrije Universiteit Amsterdam, 1105 AZ Amsterdam, The Netherlands;
| | - Nicole R. van Veenendaal
- Department of Paediatrics/Neonatology, OLVG, 1091 AC Amsterdam, The Netherlands; (H.H.); (M.T.A.); (A.A.M.W.v.K.); (N.R.v.V.)
- Department of Paediatrics, Emma Children’s Hospital, Amsterdam UMC, Vrije Universiteit Amsterdam, 1105 AZ Amsterdam, The Netherlands;
| | - Sophie R. D. van der Schoor
- Department of Paediatrics/Neonatology, OLVG, 1091 AC Amsterdam, The Netherlands; (H.H.); (M.T.A.); (A.A.M.W.v.K.); (N.R.v.V.)
- Department of Neonatology, Wilhelmina Children’s Hospital, 3508 AB Utrecht, The Netherlands
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Xu W, Cui Y, Guo D, Wang W, Xu H, Qiao S, Yu H, Ji E, Liu Y, Li Q. UPLC-MS/MS simultaneous quantification of urinary circadian rhythm hormones and related metabolites: Application to air traffic controllers. J Chromatogr B Analyt Technol Biomed Life Sci 2023; 1222:123664. [PMID: 37040674 DOI: 10.1016/j.jchromb.2023.123664] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Revised: 08/31/2022] [Accepted: 03/02/2023] [Indexed: 03/09/2023]
Abstract
Civil aviation flight crew and civil aviation air traffic controllers are prone to circadian rhythm abnormalities, which can lead to a slew of other maladies. It could endanger people's health and provide a serious threat to the safety of civil aviation flights if it is not appropriately evaluated and addressed. Early detection of rhythm irregularities and prompt treatment for particular populations that are vulnerable to rhythm disorders are crucial for enhancing civil aviation safety. In general, monitoring of the classical circadian rhythm biomarkers (melatonin or cortisol) in plasma or saliva is an effective way to evaluate the rhythm status. Due to the challenging sample procedure and the trauma of plasma, urine sample testing has received an increasing amount of attention. While, urine circadian rhythm biomarkers have seldom been examined, and the relationship between urinary steroid hormones and melatonin is still poorly understood. In most cases, hormones are determined by immunoassays respectively, mainly enzyme-linked immunosorbent assay (ELISA) or radioimmunoassay (RIA). There are also reports describing the liquid chromatography with tandem mass spectrometry (LC-MS/MS) technique as a method of melatonin or few steroid hormones quantification, however, the simultaneous detection of multiple rhythmic hormones in human urine is rarely reported. For the quantification of the rhythmic hormones in human urine, an accurate approach using ultra performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) was devised in this work. Nine endogenous hormones (melatonin, 6-hydroxymelatonin, 6-sulfatoxymelatonin, cortisol, corticosterone, cortisone, testosterone, epitestosterone and androsterone), in human overnight urine, were quantified after solid phase extraction (SPE). A reverse phase HSS C18 column was used for chromatographic separation with a 9-minute gradient elution and deuterated analogues of each analyte were applied as internal standards. This method was successfully applied to the analysis of 596 overnight urine samples (23:00-9:00) collected from 84 air traffic controllers in the Beijing area during shift work. This study's findings showed a clear correlation not only between melatonin and its metabolites; cortisol-related metabolites, but also between melatonin metabolites and endogenous metabolites upstream and downstream of cortisol, implying that these two categories of hormones can be used as potential biological rhythm indicators to provide circadian rhythm data support for future studies on circadian rhythm disorders.
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Affiliation(s)
- Weizhe Xu
- Civil Aviation Medical Center, Civil Aviation Administration of China, Beijing 100123, China
| | - Yujing Cui
- Civil Aviation Medical Center, Civil Aviation Administration of China, Beijing 100123, China
| | - Danming Guo
- Civil Aviation Medical Center, Civil Aviation Administration of China, Beijing 100123, China
| | - Wei Wang
- Civil Aviation Medical Center, Civil Aviation Administration of China, Beijing 100123, China
| | - Haishan Xu
- Civil Aviation Medical Center, Civil Aviation Administration of China, Beijing 100123, China
| | - Shi Qiao
- Civil Aviation Medical Center, Civil Aviation Administration of China, Beijing 100123, China
| | - Hongyan Yu
- Civil Aviation Medical Center, Civil Aviation Administration of China, Beijing 100123, China
| | - Enhui Ji
- Civil Aviation Medical Center, Civil Aviation Administration of China, Beijing 100123, China
| | - Yongsuo Liu
- Civil Aviation Medical Center, Civil Aviation Administration of China, Beijing 100123, China
| | - Qingyan Li
- Civil Aviation Medical Center, Civil Aviation Administration of China, Beijing 100123, China
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Hannan FM, Elajnaf T, Vandenberg LN, Kennedy SH, Thakker RV. Hormonal regulation of mammary gland development and lactation. Nat Rev Endocrinol 2023; 19:46-61. [PMID: 36192506 DOI: 10.1038/s41574-022-00742-y] [Citation(s) in RCA: 51] [Impact Index Per Article: 51.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 08/17/2022] [Indexed: 12/14/2022]
Abstract
Lactation is critical to infant short-term and long-term health and protects mothers from breast cancer, ovarian cancer and type 2 diabetes mellitus. The mammary gland is a dynamic organ, regulated by the coordinated actions of reproductive and metabolic hormones. These hormones promote gland development from puberty onwards and induce the formation of a branched, epithelial, milk-secreting organ by the end of pregnancy. Progesterone withdrawal following placental delivery initiates lactation, which is maintained by increased pituitary secretion of prolactin and oxytocin, and stimulated by infant suckling. After weaning, local cytokine production and decreased prolactin secretion trigger large-scale mammary cell loss, leading to gland involution. Here, we review advances in the molecular endocrinology of mammary gland development and milk synthesis. We discuss the hormonal functions of the mammary gland, including parathyroid hormone-related peptide secretion that stimulates maternal calcium mobilization for milk synthesis. We also consider the hormonal composition of human milk and its associated effects on infant health and development. Finally, we highlight endocrine and metabolic diseases that cause lactation insufficiency, for example, monogenic disorders of prolactin and prolactin receptor mutations, maternal obesity and diabetes mellitus, interventions during labour and delivery, and exposure to endocrine-disrupting chemicals such as polyfluoroalkyl substances in consumer products and other oestrogenic compounds.
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Affiliation(s)
- Fadil M Hannan
- Larsson-Rosenquist Foundation Oxford Centre for the Endocrinology of Human Lactation, Nuffield Department of Women's & Reproductive Health, University of Oxford, Oxford, UK.
| | - Taha Elajnaf
- Larsson-Rosenquist Foundation Oxford Centre for the Endocrinology of Human Lactation, Nuffield Department of Women's & Reproductive Health, University of Oxford, Oxford, UK
| | - Laura N Vandenberg
- Department of Environmental Health Sciences, University of Massachusetts Amherst, Amherst, MA, USA
| | - Stephen H Kennedy
- Larsson-Rosenquist Foundation Oxford Centre for the Endocrinology of Human Lactation, Nuffield Department of Women's & Reproductive Health, University of Oxford, Oxford, UK
| | - Rajesh V Thakker
- Academic Endocrine Unit, Radcliffe Department of Medicine, University of Oxford, Oxford, UK
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Muelbert M, Alexander T, Vickers MH, Harding JE, Galante L, Bloomfield FH. Glucocorticoids in preterm human milk. Front Nutr 2022; 9:965654. [PMID: 36238462 PMCID: PMC9552215 DOI: 10.3389/fnut.2022.965654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Accepted: 08/29/2022] [Indexed: 11/17/2022] Open
Abstract
Background Glucocorticoids (GCs), cortisol and cortisone, are essential regulators of many physiological responses, including immunity, stress and mammary gland function. GCs are present in human milk (HM), but whether maternal and infant factors are associated with HM GC concentration following preterm birth is unclear. Materials and methods HM samples were collected on postnatal day 5 and 10 and at 4 months’ corrected age (4m CA) in a cohort of moderate- and late-preterm infants. GCs in HM were measured by liquid chromatography-tandem mass spectrometry. Relationships between GCs in HM and both maternal and infant characteristics were investigated using Spearman’s correlations and linear mixed models. Results 170 mothers of 191 infants provided 354 HM samples. Cortisol concentrations in HM increased from postnatal day 5–4m CA (mean difference [MD] 0.6 ± 0.1 ng/ml, p < 0.001). Cortisone concentration did not change across lactation but was higher than cortisol throughout. Compared to no antenatal corticosteroid (ANS), a complete course of ANS was associated with lower GC concentrations in HM through to 4m CA (cortisol: MD –0.3 ± 0.1 ng/ml, p < 0.01; cortisone MD –1.8 ± 0.4 ng/ml, p < 0.001). At 4m CA, higher maternal perceived stress was negatively associated with GC concentrations in HM (cortisol adjusted beta-coefficient [aβ] –0.01 ± 0.01 ng/ml, p = 0.05; and cortisone aβ –0.1 ± 0.03 ng/ml, p = 0.01), whereas higher postpartum depression and maternal obesity were associated with lower cortisone concentrations (aβ –0.1 ± 0.04 ng/ml p < 0.05; MD [healthy versus obese] –0.1 ± 0.04 ng/ml p < 0.05, respectively). There was a weak positive correlation between GC concentrations in HM and gestational age at birth (r = 0.1, p < 0.05). Infant birth head circumference z-score was negatively associated with cortisol concentrations (aβ –0.01 ± 0.04 ng/ml, p < 0.05). At hospital discharge, fat-free mass showed a weak positive correlation with cortisol concentrations (r = 0.2, p = 0.03), while fat mass showed a weak negative correlation with cortisone concentrations (r = –0.25, p < 0.001). Conclusion The mammary gland appears to protect the infant from cortisol through inactivation into cortisone. Maternal and infant characteristics were associated with concentration of GCs in HM, including ANS, stress and depression scores, obesity, gestational age and infant size. The effects of HM glucocorticoids on long-term health outcomes requires further research.
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Affiliation(s)
- Mariana Muelbert
- Liggins Institute, University of Auckland, Auckland, New Zealand
| | - Tanith Alexander
- Liggins Institute, University of Auckland, Auckland, New Zealand
- Neonatal Unit, Kidz First, Middlemore Hospital, Auckland, New Zealand
| | - Mark H. Vickers
- Liggins Institute, University of Auckland, Auckland, New Zealand
| | - Jane E. Harding
- Liggins Institute, University of Auckland, Auckland, New Zealand
| | - Laura Galante
- Liggins Institute, University of Auckland, Auckland, New Zealand
| | - Frank H. Bloomfield
- Liggins Institute, University of Auckland, Auckland, New Zealand
- *Correspondence: Frank H. Bloomfield,
| | - the DIAMOND study groupMuelbertMariana1AlexanderTanith12GalanteLaura1AsadiSharin1ChongClara Y.L.1AlsweilerJane M.34BekerFriederike56BloomfieldFrank H.13Cameron-SmithDavid1CrowtherCaroline A.1HardingJane E.1JiangYannan7MeyerMichael P.24MilanAmber18o’SullivanJustin M.1WallClare R.91Liggins Institute, University of Auckland, Auckland, New Zealand2Neonatal Unit, Kidz First, Middlemore Hospital, Auckland, New Zealand3Newborn Services, Auckland City Hospital, Auckland, New Zealand4Department of Paediatrics: Child and Youth Health.5Department of Newborn Services, Mater Mothers’ Hospital, Brisbane, QLD, Australia6Mater Research Institute, The University of Queensland, Brisbane, QLD, Australia7Department of Statistics, Faculty of Science, University of Auckland, Auckland, New Zealand8Food and Bio-based Products, AgResearch Grasslands, Palmerston North, New Zealand9Department of Nutrition, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand
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van Keulen BJ, Romijn M, van der Voorn B, de Waard M, Hartmann MF, van Goudoever JB, Wudy SA, Rotteveel J, Finken MJJ. Sex-specific differences in HPA axis activity in VLBW preterm newborns. Endocr Connect 2021; 10:214-219. [PMID: 33480864 PMCID: PMC7983523 DOI: 10.1530/ec-20-0587] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Accepted: 01/20/2021] [Indexed: 12/17/2022]
Abstract
OBJECTIVE Sex-specific differences in hypothalamic-pituitary-adrenal axis activity might explain why male preterm infants are at higher risk of neonatal mortality and morbidity than their female counterparts. We examined whether male and female preterm infants differed in cortisol production and metabolism at 10 days post-partum. DESIGN AND METHODS This prospective study included 36 preterm born infants (18 boys) with a very low birth weight (VLBW) (<1.500 g). At 10 days postnatal age, urine was collected over a 4- to 6-h period. Glucocorticoid metabolites were measured using gas chromatography-mass spectrometry. Main outcome measures were: (1) cortisol excretion rate, (2) sum of all glucocorticoid metabolites, as an index of corticosteroid excretion rate, and (3) ratio of 11-OH/11-OXO metabolites, as an estimate of 11B-hydroxysteroid dehydrogenase (11B-HSD) activity. Differences between sexes, including interaction with Score of Neonatal Acute Physiology Perinatal Extension-II (SNAPPE II), sepsis and bronchopulmonary dysplasia (BPD), were assessed. RESULTS No differences between sexes were found for cortisol excretion rate, corticosteroid excretion rate or 11B-HSD activity. Interaction was observed between: sex and SNAPPE II score on 11B-HSD activity (P = 0.04) and sex and BPD on cortisol excretion rate (P = 0.04). CONCLUSION This study did not provide evidence for sex-specific differences in adrenocortical function in preterm VLBW infants on a group level. However, in an interaction model, sex differences became manifest under stressful circumstances. These patterns might provide clues for the male disadvantage in neonatal mortality and morbidity following preterm birth. However, due to the small sample size, the data should be seen as hypothesis generating.
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Affiliation(s)
- Britt J van Keulen
- Department of Pediatric Endocrinology, Emma Children’s Hospital, Amsterdam University Medical Centers, location VUmc, Amsterdam, The Netherlands
- Department of Pediatrics, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam Reproduction & Development Research Institute, de Boelelaan, Amsterdam, The Netherlands
| | - Michelle Romijn
- Department of Pediatric Endocrinology, Emma Children’s Hospital, Amsterdam University Medical Centers, location VUmc, Amsterdam, The Netherlands
- Department of Pediatrics, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam Reproduction & Development Research Institute, de Boelelaan, Amsterdam, The Netherlands
- Correspondence should be addressed to M Romijn:
| | - Bibian van der Voorn
- Department of Pediatric Endocrinology, Sophia Kinderziekenhuis, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - Marita de Waard
- Emma Children’s Hospital, Amsterdam University Medical Centers, locations AMC and VUmc, Amsterdam, The Netherlands
| | - Michaela F Hartmann
- Steroid Research and Mass Spectrometry Unit, Laboratory for Translational Hormone Analytics, Pediatric Endocrinology & Diabetology, Center of Child and Adolescent Medicine, Justus-Liebig-University, Giessen, Germany
| | - Johannes B van Goudoever
- Emma Children’s Hospital, Amsterdam University Medical Centers, locations AMC and VUmc, Amsterdam, The Netherlands
| | - Stefan A Wudy
- Steroid Research and Mass Spectrometry Unit, Laboratory for Translational Hormone Analytics, Pediatric Endocrinology & Diabetology, Center of Child and Adolescent Medicine, Justus-Liebig-University, Giessen, Germany
| | - Joost Rotteveel
- Department of Pediatric Endocrinology, Emma Children’s Hospital, Amsterdam University Medical Centers, location VUmc, Amsterdam, The Netherlands
| | - Martijn J J Finken
- Department of Pediatric Endocrinology, Emma Children’s Hospital, Amsterdam University Medical Centers, location VUmc, Amsterdam, The Netherlands
- Department of Pediatrics, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam Reproduction & Development Research Institute, de Boelelaan, Amsterdam, The Netherlands
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Circadian Variation in Human Milk Composition, a Systematic Review. Nutrients 2020; 12:nu12082328. [PMID: 32759654 PMCID: PMC7468880 DOI: 10.3390/nu12082328] [Citation(s) in RCA: 60] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 07/21/2020] [Accepted: 07/30/2020] [Indexed: 02/08/2023] Open
Abstract
Background: Breastfeeding is considered the most optimal mode of feeding for neonates and mothers. Human milk changes over the course of lactation in order to perfectly suit the infant’s nutritional and immunological needs. Its composition also varies throughout the day. Circadian fluctuations in some bioactive components are suggested to transfer chronobiological information from mother to child to assist the development of the biological clock. This review aims to give a complete overview of studies examining human milk components found to exhibit circadian variation in their concentration. Methods: We included studies assessing the concentration of a specific human milk component more than once in 24 h. Study characteristics, including gestational age, lactational stage, sampling strategy, analytical method, and outcome were extracted. Methodological quality was graded using a modified Newcastle-Ottawa Scale (NOS). Results: A total of 83 reports assessing the circadian variation in the concentration of 71 human milk components were included. Heterogeneity among studies was high. The methodological quality varied widely. Significant circadian variation is found in tryptophan, fats, triacylglycerol, cholesterol, iron, melatonin, cortisol, and cortisone. This may play a role in the child’s growth and development in terms of the biological clock.
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