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Jesus A, Mota S, Torres A, Cruz MT, Sousa E, Almeida IF, Cidade H. Antioxidants in Sunscreens: Which and What For? Antioxidants (Basel) 2023; 12:antiox12010138. [PMID: 36670999 PMCID: PMC9854756 DOI: 10.3390/antiox12010138] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 01/02/2023] [Accepted: 01/04/2023] [Indexed: 01/08/2023] Open
Abstract
Ultraviolet (UV) radiation promotes the generation of reactive oxygen species (ROS) and nitrogen species (RNS), resulting in skin damage. Cosmetic industries have adopted a strategy to incorporate antioxidants in sunscreen formulations to prevent or minimize UV-induced oxidative damage, boost photoprotection effectiveness, and mitigate skin photoaging. Many antioxidants are naturally derived, mainly from terrestrial plants; however, marine organisms have been increasingly explored as a source of new potent antioxidant molecules. This work aims to characterize the frequency of the use of antioxidants in commercial sunscreens. Photoprotective formulations currently marketed in parapharmacies and pharmacies were analyzed with respect to the composition described on the label. As a result, pure compounds with antioxidant activity were found. The majority of sunscreen formulations contained antioxidants, with vitamin E and its derivatives the most frequent. A more thorough analysis of these antioxidants is also provided, unveiling the top antioxidant ingredients found in sunscreens. A critical appraisal of the scientific evidence regarding their effectiveness is also performed. In conclusion, this work provides an up-to-date overview of the use of antioxidants in commercial sunscreens for a better understanding of the advantages associated with their use in photoprotective formulations.
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Affiliation(s)
- Ana Jesus
- Associate Laboratory i4HB—Institute for Health and Bioeconomy, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal
- UCIBIO—Applied Molecular Biosciences Unit, MedTech, Laboratory of Pharmaceutical Technology, Department of Drug Sciences, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal
| | - Sandra Mota
- Associate Laboratory i4HB—Institute for Health and Bioeconomy, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal
- UCIBIO—Applied Molecular Biosciences Unit, MedTech, Laboratory of Pharmaceutical Technology, Department of Drug Sciences, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal
| | - Ana Torres
- Associate Laboratory i4HB—Institute for Health and Bioeconomy, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal
- UCIBIO—Applied Molecular Biosciences Unit, MedTech, Laboratory of Pharmaceutical Technology, Department of Drug Sciences, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal
| | - Maria T. Cruz
- Faculty of Pharmacy, University of Coimbra, 3004-531 Coimbra, Portugal
- Center for Neuroscience and Cell Biology, 3004-504 Coimbra, Portugal
| | - Emília Sousa
- Laboratory of Organic and Pharmaceutical Chemistry, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal
- CIIMAR—Interdisciplinary Center of Marine and Environmental Research, Avenida General Norton de Matos, S/N, 4450-208 Matosinhos, Portugal
- Correspondence: (E.S.); (I.F.A.)
| | - Isabel F. Almeida
- Associate Laboratory i4HB—Institute for Health and Bioeconomy, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal
- UCIBIO—Applied Molecular Biosciences Unit, MedTech, Laboratory of Pharmaceutical Technology, Department of Drug Sciences, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal
- Correspondence: (E.S.); (I.F.A.)
| | - Honorina Cidade
- Laboratory of Organic and Pharmaceutical Chemistry, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal
- CIIMAR—Interdisciplinary Center of Marine and Environmental Research, Avenida General Norton de Matos, S/N, 4450-208 Matosinhos, Portugal
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Kang CM, Chiang BL, Wang LC. Maternal Nutritional Status and Development of Atopic Dermatitis in Their Offspring. Clin Rev Allergy Immunol 2021; 61:128-155. [PMID: 32157654 DOI: 10.1007/s12016-020-08780-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Atopic dermatitis (AD) is the leading chronic skin inflammatory disease and the initial manifestation of atopic march. Available evidence supports the notion that primary prevention early in life leads to a decreased incidence of AD, thus possibly decreasing the subsequent occurrence of atopic march. Nutritional status is essential to a proper functioning immune system and is valued for its important role in AD. Essential nutrients, which include carbohydrates, proteins, lipids, vitamins, and minerals, are transferred from the mother to the fetus through the placenta during gestation. Various nutrients, such as polyunsaturated fatty acids (PUFAs) and vitamin D, were studied in relation to maternal status and offspring allergy. However, no strong evidence indicates that a single nutrient or food in mothers' diet significantly affects the risk of childhood AD. In the light of current evidence, mothers should not either increase nor avoid consuming these nutrients to prevent or ameliorate allergic diseases in their offspring. Each essential nutrient has an important role in fetal development, and current government recommendations suggest specific intake amounts for pregnant women. This review discusses evidence on how various nutrients, including lipids (monounsaturated fatty acids, PUFAs, saturated fatty acids, and short-chain fatty acids), carbohydrates (oligosaccharides and polysaccharides), proteins, vitamins (A, B, C, D, and E), and trace minerals (magnesium, iron, zinc, copper, selenium, and strontium) in maternal status are associated with the development of AD and their possible mechanisms.
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Affiliation(s)
- Chun-Min Kang
- Department of Pediatrics, National Taiwan University Hospital, No. 7, Chung Shan South Road, Taipei, 10002, Taiwan, Republic of China
- Department of Laboratory Medicine, National Taiwan University Hospital, Taipei, Taiwan
| | - Bor-Luen Chiang
- Department of Medical Research, National Taiwan University Hospital, Taipei, Taiwan
| | - Li-Chieh Wang
- Department of Pediatrics, National Taiwan University Hospital, No. 7, Chung Shan South Road, Taipei, 10002, Taiwan, Republic of China.
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Snaidr VA, Damian DL, Halliday GM. Nicotinamide for photoprotection and skin cancer chemoprevention: A review of efficacy and safety. Exp Dermatol 2020; 28 Suppl 1:15-22. [PMID: 30698874 DOI: 10.1111/exd.13819] [Citation(s) in RCA: 56] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/25/2018] [Indexed: 12/22/2022]
Abstract
Nicotinamide is a water-soluble vitamin B3 derivative that has many roles in medicine. This review examines the role of nicotinamide in dermatology and its actions in preventing photoageing and skin cancers in humans. Nicotinamide prevents ultraviolet radiation (UV) from reducing ATP levels and inhibiting glycolysis, thus preventing the UV radiation-induced energy crisis. This enhances DNA repair and reduces UV-induced suppression of immunity. Randomised controlled clinical trials have also shown that nicotinamide reduces transepidermal water loss and the development of new non-melanoma skin cancers in high-risk humans. This review also examines nicotinamide's safety profile.
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Affiliation(s)
- Victoria A Snaidr
- Discipline of Dermatology, Bosch Institute, University of Sydney and Royal Prince Alfred Hospital Sydney, Sydney, NSW, Australia
| | - Diona L Damian
- Discipline of Dermatology, Bosch Institute, University of Sydney and Royal Prince Alfred Hospital Sydney, Sydney, NSW, Australia.,Melanoma Institute Australia, Sydney, NSW, Australia
| | - Gary M Halliday
- Discipline of Dermatology, Bosch Institute, University of Sydney and Royal Prince Alfred Hospital Sydney, Sydney, NSW, Australia
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Nicotinamide inhibits melanoma in vitro and in vivo. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2020; 39:211. [PMID: 33028392 PMCID: PMC7542872 DOI: 10.1186/s13046-020-01719-3] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Accepted: 09/24/2020] [Indexed: 02/07/2023]
Abstract
Background Even though new therapies are available against melanoma, novel approaches are needed to overcome resistance and high-toxicity issues. In the present study the anti-melanoma activity of Nicotinamide (NAM), the amide form of Niacin, was assessed in vitro and in vivo. Methods Human (A375, SK-MEL-28) and mouse (B16-F10) melanoma cell lines were used for in vitro investigations. Viability, cell-death, cell-cycle distribution, apoptosis, Nicotinamide Adenine Dinucleotide+ (NAD+), Adenosine Triphosphate (ATP), and Reactive Oxygen Species (ROS) levels were measured after NAM treatment. NAM anti-SIRT2 activity was tested in vitro; SIRT2 expression level was investigated by in silico transcriptomic analyses. Melanoma growth in vivo was measured in thirty-five C57BL/6 mice injected subcutaneously with B16-F10 melanoma cells and treated intraperitoneally with NAM. Interferon (IFN)-γ-secreting murine cells were counted with ELISPOT assay. Cytokine/chemokine plasmatic levels were measured by xMAP technology. Niacin receptors expression in human melanoma samples was also investigated by in silico transcriptomic analyses. Results NAM reduced up to 90% melanoma cell number and induced: i) accumulation in G1-phase (40% increase), ii) reduction in S- and G2-phase (about 50% decrease), iii) a 10-fold increase of cell-death and 2.5-fold increase of apoptosis in sub-G1 phase, iv) a significant increase of NAD+, ATP, and ROS levels, v) a strong inhibition of SIRT2 activity in vitro. NAM significantly delayed tumor growth in vivo (p ≤ 0.0005) and improved survival of melanoma-bearing mice (p ≤ 0.0001). About 3-fold increase (p ≤ 0.05) of Interferon-gamma (IFN-γ) producing cells was observed in NAM treated mice. The plasmatic expression levels of 6 cytokines (namely: Interleukin 5 (IL-5), Eotaxin, Interleukin 12 (p40) (IL12(p40)), Interleukin 3 (IL-3), Interleukin 10 (IL-10) and Regulated on Activation Normal T Expressed and Secreted (RANTES) were significantly changed in the blood of NAM treated mice, suggesting a key role of the immune response. The observed inhibitory effect of NAM on SIRT2 enzymatic activity confirmed previous evidence; we show here that SIRT2 expression is significantly increased in melanoma and inversely related to melanoma-patients survival. Finally, we show for the first time that the expression levels of Niacin receptors HCAR2 and HCAR3 is almost abolished in human melanoma samples. Conclusion NAM shows a relevant anti-melanoma activity in vitro and in vivo and is a suitable candidate for further clinical investigations.
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Role of Nicotinamide in Genomic Stability and Skin Cancer Chemoprevention. Int J Mol Sci 2019; 20:ijms20235946. [PMID: 31779194 PMCID: PMC6929077 DOI: 10.3390/ijms20235946] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2019] [Revised: 11/16/2019] [Accepted: 11/23/2019] [Indexed: 12/16/2022] Open
Abstract
Nicotinamide (NAM) is an amide form of vitamin B3 and the precursor of nicotinamide adenine dinucleotide (NAD+), an essential co-enzyme of redox reactions for adenosine triphosphate (ATP) production and for other metabolic processes. As NAD+ status is critical in maintaining cellular energy, vitamin B3 deficiency mainly affects tissues that need high cellular energy causing pellagra and skin sun sensitivity. In animal models, NAD+ deficiency leads to UV sensitivity of the skin, impairs DNA damage response, and increases genomic instability and cancer incidence. Furthermore, NAD+ depletion is associated with human skin aging and cancer. NAM prevents the UV-induced ATP depletion boosting cellular energy and enhances DNA repair activity in vitro and in vivo. Moreover, NAM reduces skin cancer incidence and prevents the immune-suppressive effects of UV in mice. Thus, NAM is involved in the maintenance of genomic stability and may have beneficial effects against skin aging changes and tumor development. Clinical studies showed that topical use of NAM reduces cutaneous aging. Furthermore, oral NAM administration reduces the level of UV-mediated immunosuppression and lowers the rate of non-melanoma skin cancers in high-risk patients. Therefore, NAM replenishment strategy may be a promising approach for skin cancer chemoprevention.
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Ito M, Morita T, Okazaki S, Koto M, Ichikawa Y, Takayama R, Hoashi T, Saeki H, Kanda N. Dietary habits in adult Japanese patients with atopic dermatitis. J Dermatol 2019; 46:515-521. [PMID: 30985031 DOI: 10.1111/1346-8138.14881] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Accepted: 03/11/2019] [Indexed: 12/01/2022]
Abstract
Dietary habits can modulate the pathogenesis of atopic dermatitis. We evaluated these habits in adult Japanese patients with atopic dermatitis using a validated, brief-type self-administered diet history questionnaire and compared the results to those of age- and sex-matched healthy controls. Patients with atopic dermatitis showed higher intakes of carbohydrate and potatoes and lower intakes of alcohol, niacin, meat and oils/fats compared with those of the healthy controls. The results of logistic regression analysis showed that the intake of alcohol was negatively associated with atopic dermatitis (odds ratio, 0.905; 95% confidence interval, 0.832-0.983; P = 0.0181). The intakes of vitamin B6 and fruit were positively correlated with the severity scoring of atopic dermatitis. Multiple regression analysis revealed that vitamin B6 intake was a predictor of the severity scoring of atopic dermatitis (β = 26.98508709, t = 2.3995292, P = 0.01933781). The intakes of vegetable fat, n-6 polyunsaturated fatty acid, and confections were lower in the severe atopic dermatitis group (severity scoring of atopic dermatitis, ≥33) than those in the mild group. Atopic dermatitis is negatively associated with alcohol intake, and intake of vitamin B6 is a predictor of severity scoring of atopic dermatitis. The intake of n-6 polyunsaturated fatty acid is lower in the severe atopic dermatitis group than that in the mild group. Further study is warranted on the relationships of these results with abnormal immune responses, impaired skin barrier or pruritus in atopic dermatitis.
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Affiliation(s)
- Michiko Ito
- Department of Dermatology, Nippon Medical School, Tokyo, Japan
| | - Takashi Morita
- Department of Dermatology, Nippon Medical School Chiba Hokusoh Hospital, Inzai, Japan
| | - Shizuka Okazaki
- Department of Dermatology, Nippon Medical School Chiba Hokusoh Hospital, Inzai, Japan
| | - Mototaka Koto
- Department of Dermatology, Nippon Medical School Chiba Hokusoh Hospital, Inzai, Japan
| | - Yuri Ichikawa
- Department of Dermatology, Nippon Medical School Chiba Hokusoh Hospital, Inzai, Japan
| | - Ryoko Takayama
- Department of Dermatology, Nippon Medical School, Tokyo, Japan
| | | | - Hidehisa Saeki
- Department of Dermatology, Nippon Medical School, Tokyo, Japan
| | - Naoko Kanda
- Department of Dermatology, Nippon Medical School Chiba Hokusoh Hospital, Inzai, Japan
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Bains P, Kaur M, Kaur J, Sharma S. Nicotinamide: Mechanism of action and indications in dermatology. Indian J Dermatol Venereol Leprol 2018; 84:234-237. [PMID: 29405129 DOI: 10.4103/ijdvl.ijdvl_286_17] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Affiliation(s)
- Pooja Bains
- Department of Skin and V.D, Sri Guru Ram Das Institute of Medical Sciences and Research, Amritsar, Punjab, India
| | - Manpreet Kaur
- Department of Skin and V.D, Sri Guru Ram Das Institute of Medical Sciences and Research, Amritsar, Punjab, India
| | - Jasleen Kaur
- Department of Skin and V.D, Sri Guru Ram Das Institute of Medical Sciences and Research, Amritsar, Punjab, India
| | - Saurabh Sharma
- Department of Skin and V.D, Sri Guru Ram Das Institute of Medical Sciences and Research, Amritsar, Punjab, India
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Zhai C, Zhang P, Peng P, Hou B, Li L. Hydrogen bonding and π-π stacking in nicotinamide/H 2O mixtures. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2017; 184:294-298. [PMID: 28525864 DOI: 10.1016/j.saa.2017.05.020] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2017] [Revised: 05/05/2017] [Accepted: 05/09/2017] [Indexed: 06/07/2023]
Abstract
The interactions between nicotinamide (NA) and H2O were studied using UV-visible spectra (UV-Vis), cyclic voltammetry (CV), nuclear magnetic resonance (NMR), density functional theory (DFT) and atoms in molecules (AIM) analysis. According to the changes of the UV-Vis spectra and the oxidation and reduction potentials in cyclic voltammograms of NA in aqueous solution, it was found that hydrogen bonding occurred between NA and H2O molecules. Quantum chemistry calculations and AIM analysis further confirmed the existence of hydrogen bonding between H2O molecules and the amide group, the nitrogen atom, and hydrogen atoms on the pyridine ring of NA molecules. In addition, the NMR results demonstrated that the π-π stacking between NA pyridine rings could be formed at higher concentrations.
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Affiliation(s)
- Cuiping Zhai
- Institute of Fine Chemical and Engineering, Henan Engineering Research Center of Resource & Energy Recovery from Waste, Henan University, Kaifeng 475004, China.
| | - Ping Zhang
- Institute of Fine Chemical and Engineering, Henan Engineering Research Center of Resource & Energy Recovery from Waste, Henan University, Kaifeng 475004, China
| | - Peng Peng
- Institute of Fine Chemical and Engineering, Henan Engineering Research Center of Resource & Energy Recovery from Waste, Henan University, Kaifeng 475004, China
| | - Bingbing Hou
- Institute of Fine Chemical and Engineering, Henan Engineering Research Center of Resource & Energy Recovery from Waste, Henan University, Kaifeng 475004, China
| | - Lina Li
- Institute of Fine Chemical and Engineering, Henan Engineering Research Center of Resource & Energy Recovery from Waste, Henan University, Kaifeng 475004, China
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Drucker AM, Li WQ, Park MK, Li T, Qureshi AA, Cho E. Niacin intake and incident adult-onset atopic dermatitis in women. J Allergy Clin Immunol 2017; 139:2020-2022.e2. [PMID: 28111310 DOI: 10.1016/j.jaci.2016.12.956] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2016] [Revised: 11/04/2016] [Accepted: 12/01/2016] [Indexed: 11/17/2022]
Affiliation(s)
- Aaron M Drucker
- Department of Dermatology, Warren Alpert Medical School, Providence, RI; Department of Dermatology, Rhode Island Hospital, Providence, RI
| | - Wen-Qing Li
- Department of Dermatology, Warren Alpert Medical School, Providence, RI; Department of Epidemiology, School of Public Health, Brown University, Providence, RI
| | - Min Kyung Park
- Department of Dermatology, Warren Alpert Medical School, Providence, RI
| | - Tricia Li
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Mass
| | - Abrar A Qureshi
- Department of Dermatology, Warren Alpert Medical School, Providence, RI; Department of Dermatology, Rhode Island Hospital, Providence, RI; Department of Epidemiology, School of Public Health, Brown University, Providence, RI; Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Mass
| | - Eunyoung Cho
- Department of Dermatology, Warren Alpert Medical School, Providence, RI; Department of Epidemiology, School of Public Health, Brown University, Providence, RI; Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Mass.
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Forbat E, Al-Niaimi F, Ali FR. Use of nicotinamide in dermatology. Clin Exp Dermatol 2017; 42:137-144. [PMID: 28052374 DOI: 10.1111/ced.13021] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/19/2016] [Indexed: 02/04/2023]
Abstract
Nicotinamide (niacinamide) is the water-soluble, amide form of vitamin B3. We review the evidence underlying the use of nicotinamide for various dermatological indications, including nonmelanoma cancer prophylaxis, blistering disorders, acne vulgaris and cosmetic indications, and speculate upon its future role in dermatological practice.
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Affiliation(s)
- E Forbat
- King Edward VII Hospital, London, UK
| | - F Al-Niaimi
- Dermatological Surgery and Laser Unit, St John's Institute of Dermatology, St Thomas' Hospital, London, UK
| | - F R Ali
- Dermatological Surgery and Laser Unit, St John's Institute of Dermatology, St Thomas' Hospital, London, UK
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El-Heis S, Crozier SR, Robinson SM, Harvey NC, Cooper C, Inskip HM, Godfrey KM. Higher maternal serum concentrations of nicotinamide and related metabolites in late pregnancy are associated with a lower risk of offspring atopic eczema at age 12 months. Clin Exp Allergy 2016; 46:1337-43. [PMID: 27517618 DOI: 10.1111/cea.12782] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Revised: 06/07/2016] [Accepted: 07/16/2016] [Indexed: 02/06/2023]
Abstract
BACKGROUND Evidence that atopic eczema partly originates in utero is increasing, with some studies linking the risk of developing the condition with aspects of maternal diet during pregnancy. Nicotinamide, a naturally occurring nutrient that is maintained through the dietary intakes of vitamin B3 and tryptophan, has been used in the treatment of some skin conditions including atopic eczema. OBJECTIVE To examine the relation of maternal serum concentrations of nicotinamide and related tryptophan metabolites to the risk of atopic eczema in the offspring. METHODS Within the UK Southampton Women Survey, infantile atopic eczema at ages 6 and 12 months was ascertained (modified UK Working Party Criteria for the Definition of Atopic Dermatitis). Maternal serum levels of kynurenine, kynurenic acid, anthranilic acid, tryptophan, nicotinamide and N1-methylnicotinamide were measured in late pregnancy by mass spectrometry (n = 497) and related to the odds ratio of infantile atopic eczema. RESULTS Maternal nicotinamide and related metabolite concentrations were not associated with offspring atopic eczema at age 6 months. Higher concentrations of nicotinamide and anthranilic acid were, however, associated with a lower risk of eczema at age 12 months (odds ratios 0.69, 95% CI 0.53-0.91/SD change, P = 0.007 and 0.63, 0.48-0.83, P = 0.001, respectively). The associations were robust to adjustment for potentially confounding variables. CONCLUSION AND CLINICAL RELEVANCE This is the first study linking maternal serum concentrations of nicotinamide and related metabolites to the risk of atopic eczema in the offspring. The findings point to potentially modifiable maternal influences on this complex and highly prevalent condition.
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Affiliation(s)
- S El-Heis
- Medical Research Council Lifecourse Epidemiology Unit, University of Southampton, Southampton, UK
| | - S R Crozier
- Medical Research Council Lifecourse Epidemiology Unit, University of Southampton, Southampton, UK
| | - S M Robinson
- Medical Research Council Lifecourse Epidemiology Unit, University of Southampton, Southampton, UK.,NIHR Southampton Biomedical Research Centre, University of Southampton and University Hospital Southampton NHS Foundation Trust, Southampton, UK
| | - N C Harvey
- Medical Research Council Lifecourse Epidemiology Unit, University of Southampton, Southampton, UK.,NIHR Southampton Biomedical Research Centre, University of Southampton and University Hospital Southampton NHS Foundation Trust, Southampton, UK
| | - C Cooper
- Medical Research Council Lifecourse Epidemiology Unit, University of Southampton, Southampton, UK.,NIHR Southampton Biomedical Research Centre, University of Southampton and University Hospital Southampton NHS Foundation Trust, Southampton, UK.,NIHR Musculoskeletal Biomedical Research Unit, University of Oxford, Oxford, UK
| | - H M Inskip
- Medical Research Council Lifecourse Epidemiology Unit, University of Southampton, Southampton, UK.,NIHR Southampton Biomedical Research Centre, University of Southampton and University Hospital Southampton NHS Foundation Trust, Southampton, UK
| | | | - K M Godfrey
- Medical Research Council Lifecourse Epidemiology Unit, University of Southampton, Southampton, UK. .,NIHR Southampton Biomedical Research Centre, University of Southampton and University Hospital Southampton NHS Foundation Trust, Southampton, UK. .,Institute of Developmental Sciences, University of Southampton, Southampton, UK.
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