Next Article in Journal
Development and Evaluation of a Home Enteral Nutrition Team
Next Article in Special Issue
Micronutrients in Pregnancy in Low- and Middle-Income Countries
Previous Article in Journal
Associations between Yogurt, Dairy, Calcium, and Vitamin D Intake and Obesity among U.S. Children Aged 8–18 Years: NHANES, 2005–2008
Previous Article in Special Issue
Reducing Postpartum Weight Retention and Improving Breastfeeding Outcomes in Overweight Women: A Pilot Randomised Controlled Trial

Sulphate in Pregnancy

Mater Research Institute, Level 4, Translational Research Institute, University of Queensland, 37 Kent St, TRI, Woolloongabba, QLD 4102, Australia
Mater Children's Hospital, Mater Health Services, South Brisbane, QLD 4101, Australia
Author to whom correspondence should be addressed.
Nutrients 2015, 7(3), 1594-1606;
Received: 19 December 2014 / Revised: 4 February 2015 / Accepted: 10 February 2015 / Published: 4 March 2015
(This article belongs to the Special Issue Nutrition in Pregnancy)


Sulphate is an obligate nutrient for healthy growth and development. Sulphate conjugation (sulphonation) of proteoglycans maintains the structure and function of tissues. Sulphonation also regulates the bioactivity of steroids, thyroid hormone, bile acids, catecholamines and cholecystokinin, and detoxifies certain xenobiotics and pharmacological drugs. In adults and children, sulphate is obtained from the diet and from the intracellular metabolism of sulphur-containing amino acids. Dietary sulphate intake can vary greatly and is dependent on the type of food consumed and source of drinking water. Once ingested, sulphate is absorbed into circulation where its level is maintained at approximately 300 μmol/L, making sulphate the fourth most abundant anion in plasma. In pregnant women, circulating sulphate concentrations increase by twofold with levels peaking in late gestation. This increased sulphataemia, which is mediated by up-regulation of sulphate reabsorption in the maternal kidneys, provides a reservoir of sulphate to meet the gestational needs of the developing foetus. The foetus has negligible capacity to generate sulphate and thereby, is completely reliant on sulphate supply from the maternal circulation. Maternal hyposulphataemia leads to foetal sulphate deficiency and late gestational foetal death in mice. In humans, reduced sulphonation capacity has been linked to skeletal dysplasias, ranging from the mildest form, multiple epiphyseal dysplasia, to achondrogenesis Type IB, which results in severe skeletal underdevelopment and death in utero or shortly after birth. Despite being essential for numerous cellular and metabolic functions, the nutrient sulphate is largely unappreciated in clinical settings. This article will review the physiological roles and regulation of sulphate during pregnancy, with a particular focus on animal models of disturbed sulphate homeostasis and links to human pathophysiology.
Keywords: sulphate; sulphonation; foetal development; pregnancy; gestation sulphate; sulphonation; foetal development; pregnancy; gestation

1. Introduction

Sulphate is an obligate nutrient for numerous metabolic and cellular processes, particularly in foetal growth and development [1]. The conjugation of sulphate (sulphonation) to certain endogenous molecules, including steroids (e.g., oestrogens) and thyroid hormone leads to their inactivation [2,3,4]. Importantly, the ratio of sulphonated (inactive) to unconjugated (active) hormones plays a role in modulating endocrine function, and therefore foetal and maternal physiology during pregnancy [3]. Additionally, sulphonation of structural components such as chondroitin sulphate, heparan sulphate and cerebroside sulphate is essential for the development and maintenance of tissue structure and function [5,6]. Furthermore, the foetal liver expresses abundant levels of sulphotransferases that mediate the sulphonation and clearance of xenobiotics and certain pharmacological drugs that are potentially detrimental to foetal development [7,8]. This latter role for sulphate is particularly important in human and animal gestation, as the developing foetus has negligible capacity to detoxify xenobiotics via the glucuronidation pathway that is largely inactive in the prenatal period [9,10]. Over the past few decades, numerous roles for sulphate have been described in human physiology (Figure 1A) [11]. However, despite these important physiological roles, sulphate is not routinely measured in clinical settings. Accordingly, this review highlights our current knowledge on sulphate nutrition with a particular focus on the roles and regulation of sulphate in human and animal gestation.

2. Sulphate is Obtained from the Diet

Sulphonation relies on a sufficient supply of sulphate, which is obtained from the diet as free inorganic sulphate (SO42−) or generated from sulphonated compounds and the sulphur-containing amino acids, methionine and cysteine [5,12]. A well-balanced diet contributes approximately one third of estimated average body sulphate requirements (0.2–1.5 g SO42−/day) [13,14,15,16]. Certain foods, including brassica vegetables and commercial breads contain a high sulphate content (>0.9 mg/g), whereas low sulphate levels (<0.1 mg/g) are found in some foods such as fresh apples and oranges [15]. In addition, the sulphate content of drinking water can vary greatly, from negligible levels in demineralised bottle water to >500 mg/L in water from spring-fed wells and dams [13,14,15]. Sulphate levels exceeding 500 mg/L of drinking water can result in an unpleasant taste, although some individuals are more sensitive to lower concentrations [16]. Inhalation of sulphate in air is estimated to contribute trace amounts (0.01–0.04 mg SO42−/day) for adults [17]. In addition, certain prenatal multivitamin-multimineral supplements contain sulphate, primarily in the form of cupric sulphate anhydrous, zinc sulphate and manganese sulphate, with approximately 25–40 mg SO42−/tablet.
Sulphate is one of the least toxic anions, with reported lethal doses being 45 g potassium sulphate or zinc sulphate for humans, and a minimal lethal dose of 200 mg/kg magnesium sulphate in mammals [18]. Osmotic diarrhoea has been reported in healthy adult males when they consumed 8 g of sodium sulphate (6.7 g sulphate) as a single dose, and in infants consuming sulphate concentrations >600 mg/L of water with an estimated sulphate intake of ≈66 mg/kg/day [19,20]. In addition, a self-reported laxative effect was reported in most adults consuming water with levels of sulphate 1000 to 2000 mg/L (approximately 14 to 29 mg/kg body weight) [16]. Similar findings of sulphate-induced osmotic diarrhoea have been reported in animal studies [21]. High concentrations of ingested magnesium sulphate have also been linked to osmotic diarrhoea but this is most likely due to the poor absorption of magnesium, as sulphate absorption is much higher [22,23]. Magnesium sulphate is also used for seizure prevention in preeclampsia or eclampsia, as well as a tocolytic agent, being administered i.v. to women shortly before preterm birth [24]. However, this treatment is rather unpleasant for some women with approximately 8% of women requiring cessation of treatment due to intolerable side-effects, including nausea, vomiting, flushing sweating and palpitations [24]. Oral supplements of ferrous sulphate (100 mg FeSO4 per capsule per day, ≈63 mg sulphate per capsule) are prescribed to treat iron deficiency anaemia in pregnancy. However, ferrous sulphate can be irritating to the gastrointestinal tract [25], which is largely attributed to the ferrous ions [26]. Comparative data on the effects of different iron preparations have shown that ferrous sulphate may elicit stronger inflammatory processes in the pregnant rat and foetus, when compared to ferrous fumarate [27]. These findings warrant further investigations of ferrous sulphate and other iron preparations in human pregnancy. Whilst the above findings suggest that caution may be warranted in consuming sulphate levels significantly above that found in most foods, there are currently insufficient data to identify an upper intake level to cause adverse effects to human health. Nonetheless, both food (≈0.85 g SO42−/day) and drinking water (≈0.78 g SO42−/day) provide an important source of sulphate [16], particularly in late gestation when foetal sulphate demands are increasing.
The nutritional value of sulphate in bolstering the growth of laboratory rodents was first reported almost a century ago [28]. More recent animal studies have shown that restricting sulphate in both food and water can lead to sulphate deficiency and reduced growth, which can be reversed by sulphate supplementation [29,30,31,32]. In addition, high dietary sulphate intake and administration of sulphate salts (MgSO4, Na2SO4 and ZnSO4) can lead to increased circulating sulphataemia and enhanced sulphonation capacity [33,34,35,36,37,38,39]. However, there is currently no recommended dietary intake for inorganic sulphate in humans, mainly because sulphate can be generated from the sulphur-containing amino acids.

3. Generation of Sulphate from Intracellular Metabolism

Protein is comprised of approximately 4% of the sulphur-containing amino acids methionine and cysteine [40]. Considering that the recommended daily intake of protein for 19–50 year olds in pregnancy is 0.8–1.0 g/kg [41], then the estimated amount of sulphate generated from protein is approximately 1.7 g/day. Both adults and children have the capacity to metabolise methionine and cysteine to sulphate [1]. Methionine is converted to cysteine via the transsulphuration pathway, and cysteine is further oxidised to sulphate via 2 pathways: A minor pathway of sulphate generation via cystathionine γ-lyase (CTH) and cystathionine β-synthase (CBS); and a major pathway via cysteine dioxygenase (CDO) (Figure 1B) [42]. Earlier studies reported the absence of CTH and CDO in human and rodent foetal liver, indicating that the developing foetus has a limited capacity to generate sulphate from the sulphur-containing amino acids [43,44]. This raises the question of which sources supply the high foetal demands for sulphate during pregnancy?
Figure 1. Biological roles of sulphate and pathways of sulphate homeostasis. (A) Sulphonation contributes to numerous cellular and metabolic functions in human physiology; (B) Pathways of intracellular sulphate generation and sulphonation. Methionine is converted to cysteine via the transsulphuration pathway involving cystathionine β-synthase (CBS) and cystathionine γ-lyase (CTH). Cysteine is converted to sulphate via two pathways: A minor pathway involving CBS, CTH, sulphide quinone reductase-like (SQRDL), thiosulphate sulphurtransferase (TST) and sulphite oxidase (SUOX); and a major pathway involving cysteine dioxygenase (CDO), glutamic-oxaloacetic transaminase 1 (GOT1) and SUOX. ST, Sulphate transporters; PAPSS2, PAPS synthetase; SULT, sulphotransferases; R represents those substrates shown in (A); (C) Flux of intracellular sulphate and sulphonated molecules. In adults and children, sulphate is obtained from: (i) extracellular sources via sulphate transporters; (ii) catabolism of methionine and cysteine; (iii) hydrolysis of proteoglycans in the lysosome; and (iv) sulphatase-mediated removal of sulphate from substrates in the cytosol.
Figure 1. Biological roles of sulphate and pathways of sulphate homeostasis. (A) Sulphonation contributes to numerous cellular and metabolic functions in human physiology; (B) Pathways of intracellular sulphate generation and sulphonation. Methionine is converted to cysteine via the transsulphuration pathway involving cystathionine β-synthase (CBS) and cystathionine γ-lyase (CTH). Cysteine is converted to sulphate via two pathways: A minor pathway involving CBS, CTH, sulphide quinone reductase-like (SQRDL), thiosulphate sulphurtransferase (TST) and sulphite oxidase (SUOX); and a major pathway involving cysteine dioxygenase (CDO), glutamic-oxaloacetic transaminase 1 (GOT1) and SUOX. ST, Sulphate transporters; PAPSS2, PAPS synthetase; SULT, sulphotransferases; R represents those substrates shown in (A); (C) Flux of intracellular sulphate and sulphonated molecules. In adults and children, sulphate is obtained from: (i) extracellular sources via sulphate transporters; (ii) catabolism of methionine and cysteine; (iii) hydrolysis of proteoglycans in the lysosome; and (iv) sulphatase-mediated removal of sulphate from substrates in the cytosol.
Nutrients 07 01594 g001
In adults and children, circulating sulphate levels are influenced by absorption in the small intestine, reabsorption in the kidneys, and uptake into cells throughout the body (Figure 2A) [1]. Circulating sulphate is a major source of sulphate for supplying the intracellular sulphonation of substrates in the cytoplasm (steroids, hormones, xenobiotics and proteins) or golgi apparatus (proteoglycans) [45,46]. However, the overall flux of intracellular sulphate is maintained by four pathways (Figure 1C): (i) Extracellular sulphate from circulation is transported through the plasma membrane of cells via sulphate transporters; (ii) Methionine and cysteine are catabolised to sulphate; (iii) Sulphate is removed from proteoglycans via sulphatase enzymes in the lysosome and then transported into the cytoplasm; and (iv) Cytosolic sulphatases remove sulphate from sulphonated molecules. The latter three sources have negligible or low contributions to the foetal intracellular sulphate pool, which is therefore reliant on extracellular sources sulphate [1]. In addition, the developing foetus has immature renal reabsorption and intestinal absorption capacities, highlighting the obligate requirements for supplying sulphate from mother to foetus via the placenta throughout gestation.
Figure 2. Fluxes of sulphate between tissues. (A) Contribution of the small intestine, kidneys and cells to sulphate homeostasis (B) Maternal, foetal and postnatal contributions to chondroitin sulphation. Disruption of pathways that maintain a sufficient supply of sulphate for chondrocytes (steps 1–3) or intracellular sulphonation of chondroitin (steps 4–5) lead to chondrodysplasias.
Figure 2. Fluxes of sulphate between tissues. (A) Contribution of the small intestine, kidneys and cells to sulphate homeostasis (B) Maternal, foetal and postnatal contributions to chondroitin sulphation. Disruption of pathways that maintain a sufficient supply of sulphate for chondrocytes (steps 1–3) or intracellular sulphonation of chondroitin (steps 4–5) lead to chondrodysplasias.
Nutrients 07 01594 g002

4. Sulphate Is Supplied from Mother to Foetus

During human and rodent pregnancy, maternal circulating sulphate levels increase by more than twofold to meet the gestational needs of the growing foetus [47,48], and this is remarkable because most plasma ion concentrations usually decrease slightly in pregnancy due to haemodilution [49] and speaks to its crucial role in foetal development. The increased maternal blood sulphate levels arise from increased sulphate reabsorption in the mother’s kidneys (Figure 2B) [47,48], which is mediated by increased renal expression of the SLC13A1 gene (aka NaS1, sodium sulphate transporter 1) [50]. Disruption of SLC13A1 in humans and mice causes sulphate wasting into the urine [51,52], and this greatly reduces blood sulphate levels (hyposulphataemia). In mice, loss of the Slc13a1 gene leads to behavioural abnormalities (reduced memory and olfactory function, and increased anxiety), reduced brain serotonin levels, growth retardation, impaired gastrointestinal mucin sulphonation and enhanced acetaminophen-induced liver toxicity [33,51,52,53,54,55,56,57,58]. In addition, pregnant female Slc13a1 null mice exhibit hyposulphataemia throughout gestation, which leads to foetal sulphate deficiency and mid-gestational miscarriage [48].
A related gene SLC13A4 (aka NaS2, sodium sulphate transporter 2) was recently found to be the most abundant sulphate transporter in the human and mouse placenta [50,59]. SLC13A4 is localised to the syncytiotrophoblast layer of the placenta, the site of maternal-foetal nutrient exchange, where it is proposed to be supplying sulphate from mother to foetus [59]. Loss of placental SLC13A4 in mice leads to severe foetal developmental abnormalities and late gestational foetal death, highlighting the obligate requirement of sulphate for healthy foetal growth and development [60].
Over the past decade, interest in the roles and regulation of sulphate during pregnancy has expanded following the characterisation of growth restriction and foetal demise in animal models of reduced sulphonation capacity [11]. For example, mice lacking the Sult1e1 oestrogen sulphotransferase exhibit mid-gestational foetal loss [61]. Sult1e1 is expressed in the placenta where it is essential for generating the sulphonated forms of estrone sulphate, estradiol-3-sulphate and estriol sulphate. Foetal loss and impaired foetal growth have also been linked to several other sulphotransferases and sulphatases that maintain the required biological ratio of sulphonated to unconjugated proteins and proteoglycans [11]. Despite the evidence from animal studies that show the physiological importance for sulphate during pregnancy, there are no routine measurements of sulphate in clinical settings.
In humans, free inorganic sulphate (SO42−) is the fourth most abundant anion in circulation (approximately 300 μmol/L) [62]. Early studies reported a twofold increase in plasma sulphate levels in pregnant women [35,63,64,65]. More recent studies used a validated ion chromatography method to establish reference ranges for maternal plasma sulphate levels in early (10–20 weeks) and late (30–37 weeks) gestation, as well as cord plasma sulphate levels from healthy term pregnancies [47]. These data will now enable clinical investigations into the outcomes of low plasma sulphate levels in mother and child, and will most likely expand our current knowledge into the consequences of sulphate deficiency, particularly skeletal development, which is sensitive to sulphate deficiency.

5. Reduced Sulphonation Capacity Perturbs Skeletal Growth and Development

In mammals, sulphonated proteoglycans are an essential component of extracellular matrices throughout the body, particularly in connective tissues [66,67]. The sulphate content of proteoglycans influences cell signalling function and the structural integrity of tissues [5]. Highly sulphonated glycoproteins, including chondroitin proteoglycan (CSPG), play important roles in the developing skeleton, with links to modulation of the Indian Hedgehog signalling pathway [68]. Importantly, sulphonation of CSPGs in chondrocytes is essential for normal skeletal growth and development, and several skeletal disorders have been attributed to genetic defects that lead to decreased sulphonation capacity [11].
Chondrocytes rely on an abundant supply of extracellular sulphate, to meet the intracellular demands for CSPG sulphonation (Figure 2B). Sulphate is transported into chondrocytes via the SLC26A2 sulphate transporter (step 3 of Figure 2B) [69]. More than 30 mutations in the human SLC26A2 gene have been linked to chondrodysplasias [70], with the underlying metabolic defect being reduced sulphonation of chondroitin in chondrocytes [71]. Mutant Slc26a2 mice also exhibit chondrodysplasias which mimics the biochemical and morphological phenotypes found in humans [71,72,73]. Treatment of the mutant Slc26a2 mice with dietary N-acetyl cysteine, showed increased proteoglycan sulphonation and improved skeletal phenotypes [31], suggesting that thiol-containing compounds can bolster the intracellular sulphate levels needed for sulphonation of CSPGs.
Loss of PAPS (3′-phosphoadenosine 5′-phosphosulphate) synthetase has also been linked to impaired CSPG sulphonation and skeletal dysplasias [74]. PAPS is the universal sulphonate donor for all sulphonation reactions and its formation relies on a sufficient intracellular supply of sulphate (step 4 in Figure 2B) [75]. Mammalian genomes contain two PAPS synthetase genes, PAPSS1 and PAPSS2 [76,77,78]. PAPSS2 has been linked to human pathophysiology, with similar skeletal phenotypes found in Papss2 mutant mice [76,78]. In addition, disruption of the zebrafish PAPS transporter gene (PAPST1, aka pinscher) leads to cartilage defects [79]. Skeletal phenotypes are also found in patients with mutations in the chondroitin 6-O-sulphotransferase gene (step 5 in Figure 2B) [80], showing that chondroitin sulphonation is important for maintaining healthy skeletal development. These findings highlight the importance of pathways that lead to chondroitin sulphation for healthy development, growth and maintenance of the skeleton.
Currently, there is no cure for the most severe skeletal dysplasia forms, atelosteogenesis Type II and achondrogenesis Type IB, which result in skeletal underdevelopment and death in utero or in the neonatal period [70]. The mild (multiple epiphyseal) and moderate (diastrophic dysplasia) forms of the disease are treated with orthopaedic and pain management but these patients face a lifetime of disability. Other genes including PAPSS2 have involvement with abnormal skeletal growth and development in humans [76], and the clinical spectrum associated with PAPSS2 and SLC26A2 has further expanded to include knee osteoarthritis [81], suggesting that sulphation disorders are likely to be more prevalent than the estimated 2% of all skeletal dysplasias which is based on live births [82]. This is also relevant to recent studies that have linked the renal Slc13a1 sulphate transporter gene, which is important for maintaining circulating sulphate levels, to skeletal dysplasias in animals [83,84]. These findings are likely to be relevant for human skeletal growth and development. Collectively, the lack of curative treatments for the skeletal sulphonation disorders leads to significant burden on families and community [85].
The biochemical basis of under-sulphation in the skeletal sulphation disorders is well established [69,70,86] and warrants approaches to the development of therapies for increasing sulphation capacity. Prenatal diagnosis of babies with nonlethal sulphation disorders is helpful for clinical geneticists, neonatologists, obstetricians and anaesthesiologists to plan delivery and improve postnatal outcomes. However, many of these surviving babies face life-long physical impairments, placing a huge burden on affected families [85]. Currently, there is no cure for individuals with skeletal sulphonation disorders. Conventional treatments, including orthopaedic intervention and pain management for the non-lethal forms are inadequate and warrant develop of new therapeutic approaches. In humans, there is a dosage effect of sulphonation capacity on clinical outcomes, with negligible/low sulphonation leading to the lethal and severe skeletal dysplasias, whereas moderate reductions in sulphation give rise to milder clinical outcomes [70]. The dosage effect suggests that strategies which can increase sulphonation capacity in the skeleton should ameliorate the clinical presentations. This is relevant to the high foetal demands for sulphate in mid- to late-gestation [1], which provides a window in gestation when sulphate supplementation therapies may potentially provide the most benefit for foetuses affected by a skeletal sulphation disorder. If simple low cost maternal dietary interventions, using sulphonated compounds, could increase sulphonation capacity in the developing foetal skeleton, then this could potentially have enormous benefits for ameliorating the skeletal phenotypes in affected individuals.

6. Conclusion

Sulphate is an obligate nutrient for healthy growth and development. Despite being essential for numerous cellular and metabolic processes in foetal development, its importance is largely underappreciated in clinical settings. Animal models have shown the devastating physiological outcomes of reduced sulphonation capacity on foetal growth and development, which is relevant to the established link with human chondrodysplasias. A sufficient supply of sulphate, either from the diet or from the sulphur-containing amino acids, needs to be supplied from mother to foetus, particularly in late gestation when foetal demands for sulphate are high. The development of a validated method for sulphate quantitation, together with recent data for maternal plasma sulphate reference ranges, now warrants further investigations into the consequences of nutrient sulphate deficiency in mother and child.


This work was supported by the Mater Medical Research Institute, Mater Foundation and a Mater Foundation Research Fellowship to PAD.

Author Contributions

PAD conceived of the topic, participated in the design and coordination, and drafted the manuscript. AE and FGB participated in the design of the article, and helped draft the manuscript. All authors read and approved the final manuscript.

Conflicts of Interest

The authors declare no conflict of interest.


  1. Dawson, P.A. Sulfate in fetal development. Semin. Cell Dev. Biol. 2011, 22, 653–659. [Google Scholar] [CrossRef] [PubMed]
  2. Darras, V.M.; Hume, R.; Visser, T.J. Regulation of thyroid hormone metabolism during fetal development. Mol. Cell. Endocrinol. 1999, 151, 37–47. [Google Scholar] [CrossRef] [PubMed]
  3. Dawson, P.A. The biological roles of steroid sulfonation. In Steroids—From Physiology to Clinical Medicine; Ostojic, S.M., Ed.; Intech: Rijeka, Croatia, 2012; pp. 45–64. [Google Scholar]
  4. Richard, K.; Hume, R.; Kaptein, E.; Stanley, E.L.; Visser, T.J.; Coughtrie, M.W. Sulfation of thyroid hormone and dopamine during human development: Ontogeny of phenol sulfotransferases and arylsulfatase in liver, lung, and brain. J. Clin. Endocrinol. Metab. 2001, 86, 2734–2742. [Google Scholar] [PubMed]
  5. Mulder, G.J.; Jakoby, W.B. Sulfation. In Conjugation Reactions in Drug Metabolism: An Integrated Approach: Substrates, Co-substrates, Enzymes and Their Interactions in Vivo and in Vitro; Mulder, G.J., Ed.; Taylor and Francis: London, UK, 1990; pp. 107–161. [Google Scholar]
  6. Yamaguchi, Y. Heparan sulfate proteoglycans in the nervous system: Their diverse roles in neurogenesis, axon guidance, and synaptogenesis. Semin. Cell Dev. Biol. 2001, 12, 99–106. [Google Scholar] [CrossRef] [PubMed]
  7. Alnouti, Y.; Klaassen, C.D. Tissue distribution and ontogeny of sulfotransferase enzymes in mice. Toxicol. Sci. 2006, 93, 242–255. [Google Scholar] [CrossRef] [PubMed]
  8. Stanley, E.L.; Hume, R.; Coughtrie, M.W. Expression profiling of human fetal cytosolic sulfotransferases involved in steroid and thyroid hormone metabolism and in detoxification. Mol. Cell. Endocrinol. 2005, 240, 32–42. [Google Scholar] [CrossRef] [PubMed]
  9. Hines, R.N.; McCarver, D.G. The ontogeny of human drug-metabolizing enzymes: Phase I oxidative enzymes. J. Pharmacol. Exp. Ther. 2002, 300, 355–360. [Google Scholar] [CrossRef] [PubMed]
  10. McCarver, D.G.; Hines, R.N. The ontogeny of human drug-metabolizing enzymes: Phase II conjugation enzymes and regulatory mechanisms. J. Pharmacol. Exp. Ther. 2002, 300, 361–366. [Google Scholar] [CrossRef] [PubMed]
  11. Dawson, P.A. Role of sulphate in development. Reproduction 2013, 146, R81–R89. [Google Scholar] [CrossRef] [PubMed]
  12. Smith, J.T.; Acuff, R.V. An effect of dietary sulfur on liver inorganic sulfate in the rat. Ann. Nutr. Metab. 1983, 27, 345–348. [Google Scholar] [CrossRef] [PubMed]
  13. Allen, H.E.; Halley-Henderson, M.A.; Hass, C.N. Chemical composition of bottled mineral water. Arch. Environ. Health 1989, 44, 102–116. [Google Scholar] [CrossRef] [PubMed]
  14. Florin, T.; Neale, G.; Gibson, G.R.; Christl, S.U.; Cummings, J.H. Metabolism of dietary sulphate: Absorption and excretion in humans. Gut 1991, 32, 766–773. [Google Scholar] [CrossRef] [PubMed]
  15. Florin, T.H.J.; Neale, G.; Goretski, S.; Cummings, J.H. The sulfate content of foods and beverages. J. Food Compos. Anal. 1993, 6, 140–151. [Google Scholar] [CrossRef]
  16. National Research Council. Sulfate. In Dietary Reference Intakes for Water, Potassium, Sodium, Chloride, and Sulfate; The National Academies Press: Washington, DC, USA, 2005; pp. 424–448. [Google Scholar]
  17. Health Canada. Sulphate. Available online: (accessed on 17 February 2015).
  18. U.S. Environmental Protection Agency. Drinking Water Advisory: Consumer Acceptability Advice and Health Effects Analysis on Sulfate. 2003. Available online: (accessed on 17 February 2015). [Google Scholar]
  19. Chien, L.; Robertson, H.; Gerrard, J.W. Infantile gastroenteritis due to water with high sulfate content. Can. Med. Assoc. J. 1968, 99, 102–104. [Google Scholar] [PubMed]
  20. Cocchetto, D.M.; Levy, G. Absorption of orally administered sodium sulfate in humans. J. Pharm. Sci. 1981, 70, 331–333. [Google Scholar] [CrossRef] [PubMed]
  21. Paterson, D.W.; Wahlstrom, R.C.; Libal, G.W.; Olson, O.E. Effects of sulfate in water on swine reproduction and young pig performance. J. Anim. Sci. 1979, 49, 664–667. [Google Scholar] [PubMed]
  22. Izzo, A.A.; Gaginella, T.S.; Capasso, F. The osmotic and intrinsic mechanisms of the pharmacological laxative action of oral high doses of magnesium sulphate. Importance of the release of digestive polypeptides and nitric oxide. Magnes. Res. 1996, 9, 133–138. [Google Scholar] [PubMed]
  23. Morris, M.E.; LeRoy, S.; Sutton, S.C. Absorption of magnesium from orally administered magnesium sulfate in man. J. Toxicol. Clin. Toxicol. 1987, 25, 371–382. [Google Scholar] [CrossRef] [PubMed]
  24. Doyle, L.W.; Crowther, C.A.; Middleton, P.; Marret, S.; Rouse, D. Magnesium sulphate for women at risk of preterm birth for neuroprotection of the fetus. Cochrane Database Syst. Rev. 2007, 18, CD004661. [Google Scholar]
  25. Panarelli, N.C. Drug-induced injury in the gastrointestinal tract. Semin. Diagn. Pathol. 2014, 31, 165–175. [Google Scholar] [CrossRef] [PubMed]
  26. Proudfoot, A.T.; Simpson, D.; Dyson, E.H. Management of acute iron poisoning. Med. Toxicol. 1986, 1, 83–100. [Google Scholar] [PubMed]
  27. Toblli, J.E.; Cao, G.; Oliveri, L.; Angerosa, M. Effects of iron polymaltose complex, ferrous fumarate and ferrous sulfate treatments in anemic pregnant rats, their fetuses and placentas. Inflamm. Allergy Drug Targets 2013, 12, 190–198. [Google Scholar] [CrossRef] [PubMed]
  28. Daniels, A.L.; Rich, J.K. The role of inorganic sulfates in nutrition. J. Biol. Chem. 1918, 36, 27–32. [Google Scholar]
  29. Hou, C.; Wykes, L.J.; Hoffer, L.J. Urinary sulfur excretion and the nitrogen/sulfur balance ratio reveal nonprotein sulfur amino acid retention in piglets. J. Nutr. 2003, 133, 766–772. [Google Scholar] [PubMed]
  30. McGarry, P.C.; Roe, D.A. Development of sulfur depletion in pregnant and fetal rats: Interaction of protein restriction and indole or salicylamide administration. J. Nutr. 1973, 103, 1279–1290. [Google Scholar] [PubMed]
  31. Pecora, F.; Gualeni, B.; Forlino, A.; Superti-Furga, A.; Tenni, R.; Cetta, G.; Rossi, A. In vivo contribution of amino acid sulfur to cartilage proteoglycan sulfation. Biochem. J. 2006, 398, 509–514. [Google Scholar] [CrossRef] [PubMed]
  32. Price, V.F.; Jollow, D.J. Effects of sulfur-amino acid-deficient diets on acetaminophen metabolism and hepatotoxicity in rats. Toxicol. Appl. Pharmacol. 1989, 101, 356–369. [Google Scholar] [CrossRef] [PubMed]
  33. Dawson, P.A.; Gardiner, B.; Lee, S.; Grimmond, S.; Markovich, D. Kidney transcriptome reveals altered steroid homeostasis in NaS1 sulfate transporter null mice. J. Steroid Biochem. Mol. Biol. 2008, 112, 55–62. [Google Scholar] [CrossRef] [PubMed]
  34. Hindmarsh, K.W.; Mayers, D.J.; Wallace, S.M.; Danilkewich, A.; Ernst, A. Increased serum sulfate concentrations in man due to environmental factors: Effects on acetaminophen metabolism. Vet. Hum. Toxicol. 1991, 33, 441–445. [Google Scholar] [PubMed]
  35. Morris, M.E.; Levy, G. Serum concentration and renal excretion by normal adults of inorganic sulfate after acetaminophen, ascorbic acid, or sodium sulfate. Clin. Pharmacol. Ther. 1983, 33, 529–536. [Google Scholar] [CrossRef] [PubMed]
  36. Ricci, J.; Oster, J.R.; Gutierrez, R.; Schlessinger, F.B.; Rietberg, B.; O’Sullivan, M.J.; Clerch, A.R.; Vaamonde, C.A. Influence of magnesium sulfate-induced hypermagnesemia on the anion gap: Role of hypersulfatemia. Am. J. Nephrol. 1990, 10, 409–411. [Google Scholar] [CrossRef] [PubMed]
  37. Slattery, J.T.; Levy, G. Reduction of acetaminophen toxicity by sodium sulfate in mice. Res. Commun. Chem. Pathol. Pharmacol. 1977, 18, 167–170. [Google Scholar] [PubMed]
  38. Waring, R.; Klovrza, L.V. Sulphur metabolism in autism. J. Nutr. Environ. Med. 2000, 10, 25–32. [Google Scholar] [CrossRef]
  39. Wu, Y.; Zhang, X.; Bardag-Gorce, F.; Robel, R.C.; Aguilo, J.; Chen, L.; Zeng, Y.; Hwang, K.; French, S.W.; Lu, S.C.; et al. Retinoid X receptor alpha regulates glutathione homeostasis and xenobiotic detoxification processes in mouse liver. Mol. Pharmacol. 2004, 65, 550–557. [Google Scholar] [CrossRef] [PubMed]
  40. Brand, E. Amino acid composition of simple proteins. Ann. NY Acad. Sci. 1946, 47, 187–228. [Google Scholar] [CrossRef] [PubMed]
  41. Australian Government. Nutrient Reference Values for Australia and New Zealand; NHMRC: Canberra, Australia, 2014. [Google Scholar]
  42. Ueki, I.; Roman, H.B.; Valli, A.; Fieselmann, K.; Lam, J.; Peters, R.; Hirschberger, L.L.; Stipanuk, M.H. Knockout of the murine cysteine dioxygenase gene results in severe impairment in ability to synthesize taurine and an increased catabolism of cysteine to hydrogen sulfide. Am. J. Physiol. Endocrinol. Metab. 2011, 301, E668–E684. [Google Scholar] [CrossRef] [PubMed]
  43. Gaull, G.; Sturman, J.A.; Raiha, N.C. Development of mammalian sulfur metabolism: Absence of cystathionase in human fetal tissues. Pediatr. Res. 1972, 6, 538–547. [Google Scholar] [CrossRef] [PubMed]
  44. Loriette, C.; Chatagner, F. Cysteine oxidase and cysteine sulfinic acid decarboxylase in developing rat liver. Experientia 1978, 34, 981–982. [Google Scholar] [CrossRef] [PubMed]
  45. Strott, C.A. Steroid sulfotransferases. Endocr. Rev. 1996, 17, 670–697. [Google Scholar] [CrossRef] [PubMed]
  46. Strott, C.A. Sulfonation and molecular action. Endocr. Rev. 2002, 23, 703–732. [Google Scholar] [CrossRef] [PubMed]
  47. Dawson, P.A.; McIntyre, H.D.; Petersen, S.; Gibbons, K.; Bowling, F.G.; Hurrion, E. Sulfate in human pregnancy and preterm babies: What we ought to know. J. Paed. Child Health 2014, 50, 46. [Google Scholar]
  48. Dawson, P.A.; Sim, P.; Simmons, D.G.; Markovich, D. Fetal loss and hyposulfataemia in pregnant NaS1 transporter null mice. J. Reprod. Dev. 2011, 57, 444–449. [Google Scholar] [CrossRef] [PubMed]
  49. Lind, T. Clinical chemistry of pregnancy. Adv. Clin. Chem. 1980, 21, 1–24. [Google Scholar] [PubMed]
  50. Dawson, P.A.; Rakoczy, J.; Simmons, D.G. Placental, renal, and ileal sulfate transporter gene expression in mouse gestation. Biol. Reprod. 2012, 87, 1–9. [Google Scholar] [CrossRef]
  51. Bowling, F.G.; Heussler, H.S.; McWhinney, A.; Dawson, P.A. Plasma and urinary sulfate determination in a cohort with autism. Biochem. Genet. 2012, 51, 147–153. [Google Scholar] [CrossRef] [PubMed]
  52. Dawson, P.A.; Beck, L.; Markovich, D. Hyposulfatemia, growth retardation, reduced fertility and seizures in mice lacking a functional NaSi-1 gene. Proc. Natl. Acad. Sci. USA 2003, 100, 13704–13709. [Google Scholar] [CrossRef] [PubMed]
  53. Dawson, P.A.; Gardiner, B.; Grimmond, S.; Markovich, D. Transcriptional profile reveals altered hepatic lipid and cholesterol metabolism in hyposulfatemic NaS1 null mice. Physiol. Genomics 2006, 26, 116–124. [Google Scholar] [CrossRef] [PubMed]
  54. Dawson, P.A.; Huxley, S.; Gardiner, B.; Tran, T.; McAuley, J.L.; Grimmond, S.; McGuckin, M.A.; Markovich, D. Reduced mucin sulfonation and impaired intestinal barrier function in the hyposulfataemic NaS1 null mouse. Gut 2009, 58, 910–919. [Google Scholar] [CrossRef] [PubMed]
  55. Dawson, P.A.; Steane, S.E.; Markovich, D. Behavioural abnormalities of the hyposulfataemic Nas1 knock-out mouse. Behav. Brain Res. 2004, 154, 457–463. [Google Scholar] [CrossRef] [PubMed]
  56. Dawson, P.A.; Steane, S.E.; Markovich, D. Impaired memory and olfactory performance in NaSi-1 sulphate transporter deficient mice. Behav. Brain Res. 2005, 159, 15–20. [Google Scholar] [CrossRef] [PubMed]
  57. Lee, S.; Dawson, P.A.; Hewavitharana, A.K.; Shaw, P.N.; Markovich, D. Disruption of NaS1 sulfate transport function in mice leads to enhanced acetaminophen-induced hepatotoxicity. Hepatology 2006, 43, 1241–7124. [Google Scholar] [CrossRef] [PubMed]
  58. Lee, S.; Kesby, J.P.; Muslim, M.D.; Steane, S.E.; Eyles, D.W.; Dawson, P.A.; Markovich, D. Hyperserotonaemia and reduced brain serotonin levels in NaS1 sulphate transporter null mice. Neuroreport 2007, 18, 1981–1985. [Google Scholar] [CrossRef] [PubMed]
  59. Simmons, D.G.; Rakoczy, J.; Jefferis, J.; Lourie, R.; McIntyre, H.D.; Dawson, P.A. Human placental sulfate transporter mRNA profiling identifies abundant SLC13A4 in syncytiotrophoblasts and SLC26A2 in cytotrophoblasts. Placenta 2013, 34, 381–384. [Google Scholar] [CrossRef] [PubMed]
  60. Rakoczy, J.; Dawson, P.A.; Simmons, D.G. Loss of placental sulphate transporter SLC13A4 causes severe developmental defects and embryonic lethality. Placenta 2014, 35, A96–A97. [Google Scholar] [CrossRef]
  61. Tong, M.H.; Jiang, H.; Liu, P.; Lawson, J.A.; Brass, L.F.; Song, W.C. Spontaneous fetal loss caused by placental thrombosis in estrogen sulfotransferase-deficient mice. Nat. Med. 2005, 11, 153–159. [Google Scholar] [CrossRef] [PubMed]
  62. Cole, D.E.; Evrovski, J. The clinical chemistry of inorganic sulfate. Crit. Rev. Clin. Lab. Sci. 2000, 37, 299–344. [Google Scholar] [CrossRef] [PubMed]
  63. Cole, D.E.; Baldwin, L.S.; Stirk, L.J. Increased inorganic sulfate in mother and fetus at parturition: Evidence for a fetal-to-maternal gradient. Am. J. Obstet. Gynecol. 1984, 148, 596–599. [Google Scholar] [CrossRef] [PubMed]
  64. Cole, D.E.; Baldwin, L.S.; Stirk, L.J. Increased serum sulfate in pregnancy: Relationship to gestational age. Clin. Chem. 1985, 31, 866–867. [Google Scholar] [PubMed]
  65. Tallgren, L.G. Inorganic sulphate in relation to the serum thyroxine level and in renal failure. Acta Med. Scand. 1980, 640, 1–100. [Google Scholar]
  66. Habuchi, H.; Habuchi, O.; Kimata, K. Sulfation pattern in glycosaminoglycan: Does it have a code? Glycoconj. J. 2004, 21, 47–52. [Google Scholar] [CrossRef] [PubMed]
  67. Klüppel, M. The roles of chondroitin-4-sulfotransferase-1 in development and disease. Prog. Mol. Biol. Transl. Sci. 2010, 93, 113–132. [Google Scholar] [PubMed]
  68. Cortes, M.; Baria, A.T.; Schwartz, N.B. Sulfation of chondroitin sulfate proteoglycans is necessary for proper Indian hedgehog signaling in the developing growth plate. Development 2009, 136, 1697–1706. [Google Scholar] [CrossRef] [PubMed]
  69. Rossi, A.; Bonaventure, J.; Delezoide, A.L.; Superti-Furga, A.; Cetta, G. Undersulfation of cartilage proteoglycans ex vivo and increased contribution of amino acid sulfur to sulfation in vitro in McAlister dysplasia/atelosteogenesis type 2. Eur. J. Biochem. 1997, 248, 741–747. [Google Scholar] [CrossRef] [PubMed]
  70. Dawson, P.A.; Markovich, D. Pathogenetics of the human SLC26 transporters. Curr. Med. Chem. 2005, 12, 385–396. [Google Scholar] [CrossRef] [PubMed]
  71. Cornaglia, A.I.; Casasco, A.; Casasco, M.; Riva, F.; Necchi, V. Dysplastic histogenesis of cartilage growth plate by alteration of sulphation pathway: A transgenic model. Connect. Tissue Res. 2009, 50, 232–242. [Google Scholar] [CrossRef] [PubMed]
  72. Forlino, A.; Piazza, R.; Tiveron, C.; Della Torre, S.; Tatangelo, L.; Bonafe, L.; Gualeni, B.; Romano, A.; Pecora, F.; Superti-Furga, A.; et al. A diastrophic dysplasia sulfate transporter (SLC26A2) mutant mouse: Morphological and biochemical characterization of the resulting chondrodysplasia phenotype. Hum. Mol. Genet. 2005, 14, 859–871. [Google Scholar] [CrossRef] [PubMed]
  73. Hästbacka, J.; de la Chapelle, A.; Mahtani, M.; Clines, G.; Reeve-Daly, M.P.; Daly, M.; Hamilton, B.A.; Kusumi, K.; Trivedi, B.; Weaver, A.; et al. The diastrophic dysplasia gene encodes a novel sulfate transporter: Positional cloning by fine-structure linkage disequilibrium mapping. Cell 1994, 78, 1073–1087. [Google Scholar] [CrossRef] [PubMed]
  74. Sugahara, K.; Schwartz, N.B. Defect in 3′-phosphoadenosine 5′-phosphosulfate synthesis in brachymorphic mice. I. Characterization of the defect. Arch. Biochem. Biophys. 1982, 214, 589–601. [Google Scholar] [CrossRef] [PubMed]
  75. Klassen, C.D.; Boles, J. The importance of 3′-phosphoadenosine 5′-phosphosulfate (PAPS) in the regulation of sulfation. FASEB J. 1997, 11, 404–418. [Google Scholar] [PubMed]
  76. Faiyaz ul Haque, M.; King, L.M.; Krakow, D.; Cantor, R.M.; Rusiniak, M.E.; Swank, R.T.; Superti-Furga, A.; Haque, S.; Abbas, H.; Ahmad, W.; et al. Mutations in orthologous genes in human spondyloepimetaphyseal dysplasia and the brachymorphic mouse. Nat. Genet. 1998, 20, 157–162. [Google Scholar] [CrossRef] [PubMed]
  77. Kurima, K.; Warman, M.L.; Krishnan, S.; Domowicz, M.; Krueger, R.C., Jr.; Deyrup, A.; Schwartz, N.B. A member of a family of sulfate-activating enzymes causes murine brachymorphism. Proc. Natl. Acad. Sci. USA 1998, 95, 8681–8685. [Google Scholar] [CrossRef] [PubMed]
  78. Xu, Z.H.; Otterness, D.M.; Freimuth, R.R.; Carlini, E.J.; Wood, T.C.; Mitchell, S.; Moon, E.; Kim, U.J.; Xu, J.P.; Siciliano, M.J.; et al. Human 3′-phosphoadenosine 5′-phosphosulfate synthetase 1 (PAPSS1) and PAPSS2: Gene cloning, characterization and chromosomal localization. Biochem. Biophys. Res. Commun. 2000, 268, 437–444. [Google Scholar] [CrossRef] [PubMed]
  79. Clément, A.; Wiweger, M.; von der Hardt, S.; Rusch, M.A.; Selleck, S.B.; Chien, C.B.; Roehl, H.H. Regulation of zebrafish skeletogenesis by ext2/dackel and papst1/pinscher. PLoS Genet. 2008, 4, e1000136. [Google Scholar] [CrossRef] [PubMed]
  80. Thiele, H.; Sakano, M.; Kitagawa, H.; Sugahara, K.; Rajab, A.; Höhne, W.; Ritter, H.; Leschik, G.; Nürnberg, P.; Mundlos, S. Loss of chondroitin 6-O-sulfotransferase-1 function results in severe human chondrodysplasia with progressive spinal involvement. Proc. Natl. Acad. Sci. USA 2004, 101, 10155–10160. [Google Scholar] [CrossRef] [PubMed]
  81. Ikeda, T.; Mabuchi, A.; Fukuda, A.; Hiraoka, H.; Kawakami, A.; Yamamoto, S.; Machida, H.; Takatori, Y.; Kawaguchi, H.; Nakamura, K.; Ikegawa, S. Identification of sequence polymorphisms in two sulfation-related genes, PAPSS2 and SLC26A2, and an association analysis with knee osteoarthritis. J. Hum. Genet. 2001, 46, 538–543. [Google Scholar] [CrossRef] [PubMed]
  82. Stevenson, D.A.; Carey, J.C.; Byrne, J.L.; Srisukhumbowornchai, S.; Feldkamp, M.L. Analysis of skeletal dysplasias in the Utah population. Am. J. Med. Genet. A 2012, 158A, 1046–1054. [Google Scholar] [CrossRef]
  83. Neff, M.W.; Beck, J.S.; Koeman, J.M.; Boguslawski, E.; Kefene, L.; Borgman, A.; Ruhe, A.L. Partial deletion of the sulfate transporter SLC13A1 is associated with an osteochondrodysplasia in the Miniature Poodle breed. PLoS One 2012, 7, e51917. [Google Scholar] [CrossRef] [PubMed]
  84. Zhao, X.; Onteru, S.K.; Piripi, S.; Thompson, K.G.; Blair, H.T.; Garrick, D.J.; Rothschild, M.F. In a shake of a lamb’s tail: Using genomics to unravel a cause of chondrodysplasia in Texel sheep. Anim. Genet. 2012, 43, 9–18. [Google Scholar] [CrossRef] [PubMed]
  85. Orenius, T.; Krüger, L.; Kautiainen, H.; Hurri, H.; Pohjolainen, T. The sense of coherence and its relation to health factors among patients with diastrophic dysplasia. J. Pub. Health Epidem. 2012, 4, 305–310. [Google Scholar] [CrossRef]
  86. Rossi, A.; Kaitila, I.; Wilcox, W.R.; Rimoin, D.L.; Steinmann, B.; Cetta, G.; Superti-Furga, A. Proteoglycan sulfation in cartilage and cell cultures from patients with sulfate transporter chondrodysplasias: Relationship to clinical severity and indications on the role of intracellular sulfate production. Matrix Biol. 1998, 17, 361–369. [Google Scholar] [CrossRef] [PubMed]
Back to TopTop