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López-Hernández Y, Oropeza-Valdez JJ, Blanco-Sandate JO, Herrera-Van Oostdam AS, Zheng J, Chi Guo A, Lima-Rogel V, Rajabzadeh R, Salgado-Bustamante M, Adrian-Lopez J, Castillo CG, Robles Arguelles E, Monárrez-Espino J, Mandal R, Wishart DS. The Urinary Metabolome of Healthy Newborns. Metabolites 2020; 10:E165. [PMID: 32340350 PMCID: PMC7240964 DOI: 10.3390/metabo10040165] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2020] [Revised: 04/18/2020] [Accepted: 04/21/2020] [Indexed: 02/06/2023] Open
Abstract
The knowledge of normal metabolite values for neonates is key to establishing robust cut-off values to diagnose diseases, to predict the occurrence of new diseases, to monitor a neonate's metabolism, or to assess their general health status. For full term-newborns, many reference biochemical values are available for blood, serum, plasma and cerebrospinal fluid. However, there is a surprising lack of information about normal urine concentration values for a large number of important metabolites in neonates. In the present work, we used targeted tandem mass spectrometry (MS/MS)-based metabolomic assays to identify and quantify 136 metabolites of biomedical interest in the urine from 48 healthy, full-term term neonates, collected in the first 24 h of life. In addition to this experimental study, we performed a literature review (covering the past eight years and over 500 papers) to update the references values in the Human Metabolome Database/Urine Metabolome Database (HMDB/UMDB). Notably, 86 of the experimentally measured urinary metabolites are being reported in neonates/infants for the first time and another 20 metabolites are being reported in human urine for the first time ever. Sex differences were found for 15 metabolites. The literature review allowed us to identify another 78 urinary metabolites with concentration data. As a result, reference concentration values and ranges for 378 neonatal urinary metabolites are now publicly accessible via the HMDB.
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Affiliation(s)
- Yamilé López-Hernández
- CONACyT, Metabolomics and Proteomics Laboratory, Universidad Autónoma de Zacatecas, Zacatecas 98000, Mexico
| | - Juan José Oropeza-Valdez
- Unidad de Investigación Biomédica de Zacatecas, Instituto Mexicano del Seguro Social, Zacatecas 98000, Mexico;
| | - Jorge O. Blanco-Sandate
- CIACYT-Facultad de Medicina, Universidad Autónoma de San Luis Potosí, San Luis Potosí 78210, Mexico; (J.O.B.-S.); (C.G.C.)
| | - Ana Sofia Herrera-Van Oostdam
- Biochemistry Department, Faculty of Medicine, Universidad Autónoma de San Luis Potosí, San Luis Potosí 78210, Mexico; (A.S.H.-V.O.); (M.S.-B.)
| | - Jiamin Zheng
- The Metabolomics Innovation Center, University of Alberta, Edmonton, AB T6G1C9, Canada; (J.Z.); (A.C.G.); (R.R.); (R.M.)
| | - An Chi Guo
- The Metabolomics Innovation Center, University of Alberta, Edmonton, AB T6G1C9, Canada; (J.Z.); (A.C.G.); (R.R.); (R.M.)
| | - Victoria Lima-Rogel
- Hospital Central “Dr. Ignacio Morones Prieto”, San Luis Potosí 78290, Mexico;
| | - Rahmatollah Rajabzadeh
- The Metabolomics Innovation Center, University of Alberta, Edmonton, AB T6G1C9, Canada; (J.Z.); (A.C.G.); (R.R.); (R.M.)
| | - Mariana Salgado-Bustamante
- Biochemistry Department, Faculty of Medicine, Universidad Autónoma de San Luis Potosí, San Luis Potosí 78210, Mexico; (A.S.H.-V.O.); (M.S.-B.)
| | - Jesus Adrian-Lopez
- MicroRNAs Laboratory, Unidad Académica de Ciencias Biológicas, Universidad Autónoma de Zacatecas, Zacatecas 98000, Mexico; (J.A.-L.); (E.R.A.)
| | - C. G. Castillo
- CIACYT-Facultad de Medicina, Universidad Autónoma de San Luis Potosí, San Luis Potosí 78210, Mexico; (J.O.B.-S.); (C.G.C.)
| | - Emilia Robles Arguelles
- MicroRNAs Laboratory, Unidad Académica de Ciencias Biológicas, Universidad Autónoma de Zacatecas, Zacatecas 98000, Mexico; (J.A.-L.); (E.R.A.)
| | | | - Rupasri Mandal
- The Metabolomics Innovation Center, University of Alberta, Edmonton, AB T6G1C9, Canada; (J.Z.); (A.C.G.); (R.R.); (R.M.)
| | - David S. Wishart
- The Metabolomics Innovation Center, University of Alberta, Edmonton, AB T6G1C9, Canada; (J.Z.); (A.C.G.); (R.R.); (R.M.)
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Idama TO, Lindow SW, Masson EA. Idiopathic hypoparathyroidism-two successful pregnancies despite uncontrolled hypocalcaemia. J OBSTET GYNAECOL 1999; 19:162-3. [PMID: 15512260 DOI: 10.1080/01443619965507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- T O Idama
- Department of Obstetrics and Gynaecology, Hull Maternity Hospital, UK
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Budayr AA, Halloran BP, King JC, Diep D, Nissenson RA, Strewler GJ. High levels of a parathyroid hormone-like protein in milk. Proc Natl Acad Sci U S A 1989; 86:7183-5. [PMID: 2550932 PMCID: PMC298020 DOI: 10.1073/pnas.86.18.7183] [Citation(s) in RCA: 145] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Expression of a parathyroid hormone-like protein (PLP), which is associated with hypercalcemia in malignancy, has recently been localized to normal lactating mammary tissue. We examined the possibility of an extramammary role of PLP by measuring its levels in serum and milk of lactating women. The levels of PLP by radioimmunoassay in serum of lactating and nonlactating women were indistinguishable [4.2 +/- 1.8 and 3.6 +/- 1.0 pg equivalents (eq) of PLP-(1-34) amide per ml, respectively]. As PLP was undetectable in some serum samples, this result does not exclude the possibility that lactation results in a small increase in serum levels of PLP. In contrast, high concentrations of immunoreactive PLP [40,000-75,000 pg eq of PLP-(1-34) amide per ml] and correspondingly high concentrations of bioactive PLP were found in human, rat, and bovine milk. A variety of processed bovine milk products had a PLP content similar to that of fresh bovine milk, whereas infant formulas had lower concentrations, ranging down to undetectable. Although the physiological role of PLP in lactation is unknown, the data establish the presence of PLP in milk and suggest the possibility that PLP may be important in neonatal calcium homeostasis.
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Affiliation(s)
- A A Budayr
- Endocrine Unit, Veteran's Administration Medical Center, San Francisco, CA
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Congdon P, Horsman A, Kirby PA, Dibble J, Bashir T. Mineral content of the forearms of babies born to Asian and white mothers. BMJ : BRITISH MEDICAL JOURNAL 1983; 286:1233-5. [PMID: 6404403 PMCID: PMC1547285 DOI: 10.1136/bmj.286.6373.1233] [Citation(s) in RCA: 56] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Vitamin D deficiency is common in pregnant Asian women. The effect of maternal vitamin D deficiency on fetal skeletal mineralisation was assessed by measuring the bone mineral content of babies born to 45 Asian women, 19 Asian women who had received 1000 units of vitamin D during the last trimester, and 12 white women. The mean cord blood concentrations of 25-hydroxy vitamin D in the three groups were 5.9 +/- SE 0.9 nmol/l (2.4 +/- SE 0.4 ng/ml), 15.2 +/- 3.2 nmol/l (6.1 +/- 1.3 ng/ml), and 33.4 +/- 3.6 nmol/l (13.4 ng/ml), respectively. Despite this wide variation in values there was no significant difference in the bone mineral content (as assessed by photon absorptiometry) of the forearms of babies born to these women. This suggests that mineralization of the fetal skeleton is not impaired in maternal vitamin D deficiency. Craniotabes (skull softening) was present in seven of the 64 Asian babies. The bone mineral content in these babies was not significantly different from that of babies without this sign, and craniotabes should not therefore be taken as an indication of a generalized impairment in skeletal mineralization.
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Bouillon R, Van Assche FA, Van Baelen H, Heyns W, De Moor P. Influence of the vitamin D-binding protein on the serum concentration of 1,25-dihydroxyvitamin D3. Significance of the free 1,25-dihydroxyvitamin D3 concentration. J Clin Invest 1981; 67:589-96. [PMID: 6894152 PMCID: PMC370606 DOI: 10.1172/jci110072] [Citation(s) in RCA: 395] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
The influence of the serum binding protein (DBP) for vitamin D and its metabolites on the concentration of its main ligands, 25-hydroxyvitamin D(3) (25-OHD(3)) and 1,25-dihydroxyvitamin D(3) (1,25-[OH](2)D(3)) was studied. The concentration of both 1,25-(OH)(2)D(3) and DBP in normal female subjects (45+/-14 ng/liter and 333+/-58 mg/liter, mean+/-SD, respectively; n = 58) increased during the intake of estro-progestogens (69+/-27 ng/liter and 488+/-90 mg/liter, respectively; n = 29), whereas the 25-OHD(3) concentration remained unchanged. A positive correlation was found between the concentrations of 1,25-(OH)(2)D(3) and DBP in these women. At the end of pregnancy, the total concentrations of 1,25-(OH)(2)D(3) (97+/-26 ng/liter, n = 40) and DBP (616+/-84 mg/liter) are both significantly higher than in nonpregnant females and paired cord serum samples (48+/-11 ng/liter and 266+/-41 mg/liter, respectively). A marked seasonal variation of 25-OHD(3) was observed in pregnant females and their infants, whereas in the same samples the concentrations of both DBP and 1,25-(OH)(2)D(3) remained constant throughout the year. The free 1,25-(OH)(2)D(3) index, calculated as the molar ratio of this steroid and DBP, remains normal in women taking estro-progestogens, however, and this might explain their normal intestinal calcium absorption despite a high total 1,25-(OH)(2)D(3) concentration. In pregnancy the free 1,25-(OH)(2)D(3) index remains normal up to 35 wk of gestation, but during the last weeks of gestation, the free 1,25-(OH)(2)D(3) index increases in both circulations. A highly significant correlation exists between the (total and free) 25-OHD(3) and 1,25-(OH)(2)D(3) concentrations in maternal and cord serum both at 35 and 40 wk of gestation.
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