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Manca A, Mula J, Palermiti A, Vischia F, Cori DD, Venturello S, Emanuelli G, Maiese D, Antonucci M, Nicolò AD, Vivo EDD, Cusato J, D'Avolio A. Vitamin D impact in affecting clozapine plasma exposure: A potential contribution of seasonality. Biomed Pharmacother 2023; 165:115103. [PMID: 37413901 DOI: 10.1016/j.biopha.2023.115103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 06/27/2023] [Accepted: 06/28/2023] [Indexed: 07/08/2023] Open
Abstract
Schizophrenia affects approximately 24 million people worldwide and clozapine is the most effective antipsychotic drug. Nevertheless, its use in therapy is limited due to adverse effects.Therapeutic drug monitoring is a clinical tool useful to reduce the clozapine toxicity. In the literature, papers showed how psychiatric disorders could be associated with low vitamin D levels, but a few studies focusing on its role in affecting clozapine exposure are available. A TDM repository was analyzed: clozapine and vitamin D levels measured with liquid chromatography were considered. 1261 samples obtained from 228 individuals were evaluated: 624 patients (49.5%) showed clozapine plasma levels in therapeutic range (350-600 ng/mL). Clozapine toxic plasma levels (>1000 ng/mL) were more present in winter (p = 0.025), compared to other seasons. Concerning vitamin D, a sub-analysis of 859 samples was performed: 326 (37.81%) were deficient ( ng/mL), 490 (57.12%) had insufficient concentrations (10-30 ng/mL), while 43 (5.02%) had sufficient (>30 ng/mL) levels. A correlation between vitamin D and clozapine plasma levels (p = 0.007, Pearson coefficient=0.093) was observed. The role of seasonal variation in clozapine plasma exposure in psychiatric patients treated with clozapine was suggested. Further studies in larger cohorts are needed in order to clarify these aspects.
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Affiliation(s)
- Alessandra Manca
- Department of Medical Sciences, University of Turin, Amedeo di Savoia Hospital, Turin, Italy
| | - Jacopo Mula
- Department of Medical Sciences, University of Turin, Amedeo di Savoia Hospital, Turin, Italy; CoQua Lab s.r.l, Italy
| | - Alice Palermiti
- Department of Medical Sciences, University of Turin, Amedeo di Savoia Hospital, Turin, Italy.
| | - Flavio Vischia
- Department of Mental Health-Psychiatric Unit West, 10149 Turin, Italy
| | - David De Cori
- Department of Mental Health-Psychiatric Unit West, 10149 Turin, Italy
| | - Sara Venturello
- Department of Mental Health-Psychiatric Unit East, Day Service S.G. Bosco, 10144 Turin, Italy
| | - Guido Emanuelli
- Department of Mental Health-Psychiatric Unit East, S.G. Bosco, 10144 Turin, Italy
| | - Domenico Maiese
- Department of Medical Sciences, University of Turin, Amedeo di Savoia Hospital, Turin, Italy
| | - Miriam Antonucci
- SCDU Infectious Diseases, Amedeo di Savoia Hospital, ASL Città di Torino 10149 Italy
| | - Amedeo De Nicolò
- Department of Medical Sciences, University of Turin, Amedeo di Savoia Hospital, Turin, Italy
| | - Elisa Delia De Vivo
- Department of Medical Sciences, University of Turin, Amedeo di Savoia Hospital, Turin, Italy
| | - Jessica Cusato
- Department of Medical Sciences, University of Turin, Amedeo di Savoia Hospital, Turin, Italy
| | - Antonio D'Avolio
- Department of Medical Sciences, University of Turin, Amedeo di Savoia Hospital, Turin, Italy
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Huang YL, Pham TTM, Chen YC, Chang JS, Chao JCJ, Bai CH. Effects of Climate, Sun Exposure, and Dietary Intake on Vitamin D Concentrations in Pregnant Women: A Population-Based Study. Nutrients 2023; 15:nu15051182. [PMID: 36904183 PMCID: PMC10005797 DOI: 10.3390/nu15051182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 02/23/2023] [Accepted: 02/24/2023] [Indexed: 03/02/2023] Open
Abstract
BACKGROUND Vitamin D deficiency (VDD) is a global micronutrient issue that commonly occurs in pregnant women, leading to adverse health outcomes. We examined the role of sunlight-related factors and dietary vitamin D intake on vitamin D concentrations among pregnant women in different climate zones. METHODS We conducted a nationwide cross-sectional survey in Taiwan between June 2017 and February 2019. The data of 1502 pregnant women were collected, including sociodemographic information and characteristics related to pregnancy, diet, and sun exposure. Serum 25-hydroxyvitamin D concentrations were measured, and VDD was assessed as a concentration of less than 20 ng/mL. Logistic regression analyses were used to explore the factors associated with VDD. Furthermore, the area under the receiver operating characteristic (AUROC) curve was used to analyze the contribution of sunlight-related factors and dietary vitamin D intake to vitamin D status stratified by climate zones. RESULTS The prevalence of VDD was 30.1% and was the highest in the north. Sufficient intake of red meat (odds ratio (OR): 0.50, 95% confidence interval (CI): 0.32-0.75; p = 0.002), vitamin D and/or calcium supplements (OR: 0.51, 95% CI: 0.39-0.66; p < 0.001), sun exposure (OR: 0.75, 95% CI: 0.57-0.98; p = 0.034), and blood draw during sunny months (OR: 0.59, 95% CI: 0.46-0.77; p < 0.001) were associated with a lower likelihood of VDD. Additionally, in northern Taiwan, which is characterized by a subtropical climate, dietary vitamin D intake (AUROC: 0.580, 95% CI: 0.528-0.633) had a greater influence on vitamin D status than did sunlight-related factors (AUROC: 0.536, 95% CI: 0.508-0.589) with a z value = 51.98, p < 0.001. By contrast, sunlight-related factors (AUROC: 0.659, 95% CI: 0.618-0.700) were more important than dietary vitamin D intake (AUROC: 0.617, 95% CI, 0.575-0.660) among women living in tropical areas of Taiwan (z value = 54.02, p < 0.001). CONCLUSIONS Dietary vitamin D intake was essential to alleviate VDD in the tropical region, whereas sunlight-related factors played a greater role in subtropical areas. Safe sunlight exposure and adequate dietary vitamin D intake should be promoted appropriately as a strategic healthcare program.
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Affiliation(s)
- Ya-Li Huang
- Department of Public Health, School of Medicine, College of Medicine, Taipei Medical University, Taipei 110-31, Taiwan
- School of Public Health, College of Public Health, Taipei Medical University, Taipei 110-31, Taiwan
| | - Thu T. M. Pham
- School of Public Health, College of Public Health, Taipei Medical University, Taipei 110-31, Taiwan
- Faculty of Public Health, Hai Phong University of Medicine and Pharmacy, Hai Phong 042-12, Vietnam
| | - Yi-Chun Chen
- School of Nutrition and Health Sciences, Taipei Medical University, Taipei 110-31, Taiwan
| | - Jung-Su Chang
- School of Nutrition and Health Sciences, Taipei Medical University, Taipei 110-31, Taiwan
- Nutrition Research Center, Taipei Medical University Hospital, Taipei 110-31, Taiwan
- Graduate Institute of Metabolism and Obesity Sciences, College of Nutrition, Taipei Medical University, Taipei 110-31, Taiwan
- Chinese Taipei Society for the Study of Obesity, Taipei 110-31, Taiwan
| | - Jane C.-J. Chao
- School of Nutrition and Health Sciences, Taipei Medical University, Taipei 110-31, Taiwan
- Nutrition Research Center, Taipei Medical University Hospital, Taipei 110-31, Taiwan
- Master Program in Global Health and Development, College of Public Health, Taipei Medical University, Taipei 110-31, Taiwan
| | - Chyi-Huey Bai
- Department of Public Health, School of Medicine, College of Medicine, Taipei Medical University, Taipei 110-31, Taiwan
- School of Public Health, College of Public Health, Taipei Medical University, Taipei 110-31, Taiwan
- Nutrition Research Center, Taipei Medical University Hospital, Taipei 110-31, Taiwan
- Correspondence:
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Shen X, Gu X, Liu YY, Yang L, Zheng M, Jiang L. Association between dietary calcium and depression among American adults: National health and nutrition examination survey. Front Nutr 2023; 10:1042522. [PMID: 36845060 PMCID: PMC9948022 DOI: 10.3389/fnut.2023.1042522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Accepted: 01/23/2023] [Indexed: 02/11/2023] Open
Abstract
Background There is only limited evidence for an association between calcium (Ca) and depression, and the relationship was inconsistent. Therefore, the aim of this study was to assess the relationship between dietary Ca and the risk of depressive symptoms in individuals over the age of 18 in the US. Methods We extracted 14,971 participants from the US National Health and Nutrition Examination Survey (NHANES) 2007-2016 to probe their associations. Dietary Ca intake was measured through 24 h dietary recall method. Patients with the Patient Health Questionnaire-9 (PHQ-9) ≥ 10 scores were believed to have depressive symptoms. The association between dietary Ca and depressive symptoms was investigated using multivariate logistic regression, sensitivity analysis, and restricted cubic spline regression. Results In this study, 7.6% (1,144/14,971) of them had depressive symptoms. After adjusting for sex, age, race, poverty to income ratio (PIR), marital status, education, body mass index (BMI), caffeine intake, carbohydrates intake, total energy intake, smoking status, alcohol consumption, physical activity, diabetes, hypertension, severe cardiovascular disease (CVD), cancer, serum vitamin D, serum Ca, and Ca supplement, the adjusted ORs value [95% confidence interval (CI)] of depression for the lowest category (Q1 ≤ 534 mg/day) vs. Q2-Q4 of Ca intake were 0.83 (0.69-0.99), 0.97 (0.65-0.95), and 0.80 (0.63-0.98) with the p for trend (p = 0.014). The relationship between dietary Ca intake and depressive symptoms was linear (non-linear p = 0.148). None of the interactions were significant except among races (p for interaction = 0.001). Conclusion Association between dietary Ca and the prevalence of depressive symptoms in US adults. And Ca intake was negatively associated with the risk of depressive symptoms. As Ca intake increased, the prevalence of depressive symptoms decreased.
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Affiliation(s)
- Xia Shen
- Wuxi Medical College, Jiangnan University, Wuxi, China
| | - Xue Gu
- Wuxi Medical College, Jiangnan University, Wuxi, China
| | - Yuan-Yuan Liu
- Wuxi Medical College, Jiangnan University, Wuxi, China
| | - Long Yang
- Department of Pediatric Cardiothoracic Surgery, The First Affiliated Hospital of Xinjiang Medical University, Ürümqi, China
| | - Meng Zheng
- The Fifth Medical Center of People’s Liberation Army (PLA) General Hospital, Beijing, China
| | - Lei Jiang
- Department of Radiology, The Convalescent Hospital of East China, Wuxi, China,*Correspondence: Lei Jiang,
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Tarikere Satyanarayana P, Suryanarayana R, Theophilus Yesupatham S, Reddy S, Reddy N. Is Sunshine Vitamin Related to Adolescent Depression? A Cross-Sectional Study of Vitamin D Status and Depression Among Rural Adolescents. Cureus 2023; 15:e34639. [PMID: 36895546 PMCID: PMC9989901 DOI: 10.7759/cureus.34639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/04/2023] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Adolescence is the phase of rapid transition of the body. The requirement of all minerals and vitamins changes in this phase of life so does Vitamin D. Despite Vitamin D being abundantly available, its deficiency, which can cause innumerable side effects on the body, is extremely common among the general population. Material and methods: The present study was a cross-sectional study carried out from January 2021 to July 2022 for two years at various government rural high schools in Kolar, Karnataka, India. All adolescents who were aged 11-18 years and studying in 9th and 10th standards were included in the study after consent and assent. Adolescent boys and girls with any pre-existing mental health illness were excluded from the study. To assess depression, Beck's Depression Inventory (BDI-II) was used. Vitamin D3 levels were assessed by using VITROS Immunodiagnostic products using a 25-OH Total reagent pack. All data were entered in a Microsoft Excel sheet (Redmond, USA) and analyzed using IBM Corp. Released 2013. IBM SPSS Statistics for Windows, Version 22.0. Armonk, NY: IBM Corp. To check for the association between factors, Chi-square was applied with a level of significance defined as a p-value less than 0.05. RESULTS Out of 451 students, 272 (60.3%) belonged to the 15-year age group, 224 (49.7%) were boys, 235 (52.1%) were studying in 10th standard, 323 (71.6 %) belonged to nuclear families, 379 (84%) were non-vegetarian by diet, 222 (49.2%) had sun exposure in the afternoon, and 156 (34.6%) had a sun exposure of fewer than 60 minutes, 133 (29.5%) had severe depression according to Beck's Depression Inventory-II. One hundred sixty-two (35.9%) had insufficient Vitamin D3 levels (12-20 ng/ml), and 66 (14.6%) had deficient levels of Vitamin D3 (less than 12 ng/dl). There was a statistically significant association between depression and Vitamin D3 levels. CONCLUSION There are innumerable causes of adolescent depression. The present study shows Vitamin D levels were statistically associated with depression among adolescents. Vitamin D supplementation of at least 600 international units, which is the recommended dietary allowance (RDA), could be beneficial in tackling Vitamin D to sufficiency status (20-100 ng/ml) and also indirectly address Adolescent Depression. Better study designs, like randomized control trials showing Vitamin D intervention and its possible curative role in adolescent depression, are required to establish the causal association.
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Affiliation(s)
- Pradeep Tarikere Satyanarayana
- Community Medicine, Sri Devaraj Urs Medical College (SDUMC) Sri Devaraj Urs Academy of Higher Education and Research (SDUAHER), Kolar, IND
| | - Ravishankar Suryanarayana
- Biostatistics, Sri Devaraj Urs Medical College (SDUMC) Sri Devaraj Urs Academy of Higher Education and Research (SDUAHER), Kolar, IND
| | - Susanna Theophilus Yesupatham
- Biochemistry, Sri Devaraj Urs Medical College (SDUMC) Sri Devaraj Urs Academy of Higher Education and Research (SDUAHER), Kolar, IND
| | - Sudha Reddy
- Pediatrics, Sri Devaraj Urs Medical College (SDUMC) Sri Devaraj Urs Academy of Higher Education and Research (SDUAHER), Kolar, IND
| | - Navya Reddy
- Psychiatry, Sri Devaraj Urs Medical College (SDUMC) Sri Devaraj Urs Academy of Higher Education and Research (SDUAHER), Kolar, IND
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Yadav B, Gupta N, Sasidharan R, Thanigainathan S, Purohit P, Singh K, Sharma P, Singh A. 800 IU versus 400 IU per day of vitamin D 3 in term breastfed infants: a randomized controlled trial from an LMIC. Eur J Pediatr 2022; 181:3473-3482. [PMID: 35726033 DOI: 10.1007/s00431-022-04533-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Accepted: 06/14/2022] [Indexed: 11/03/2022]
Abstract
This open-label, block-randomized controlled trial compared the effect of 800 IU/day and 400 IU/day of oral vitamin D3 supplementation in reducing vitamin D insufficiency (VDI) among healthy-term breastfed infants at 14 weeks of postnatal age. All eligible infants were randomized to receive either 800 or 400 IU/day of oral vitamin D3 (starting within the first week until 14 weeks). The primary outcome was the proportion of infants with VDI (25-OH-D < 20 ng/ml) at 14 weeks. Secondary outcomes were vitamin D deficiency (VDD, < 12 ng/ml), severe VDD (< 5 ng/ml), anthropometry, biochemical or clinical rickets, and any adverse events related to vitamin D toxicity (VDT). Among 102 enrolled infants, the distribution of baseline variables (including cord 25-OH-D levels; 13.0 versus 14.2 ng/ml) was similar in both groups. On intention-to-treat analysis, the proportions of infants with VDI at 14 weeks were significantly lower in the 800 IU group compared to those in the 400 IU group [24% versus 55%; RR 0.44; 95% CI: 0.25-0.76]. The proportions of infants with elevated parathormone (6% versus 26.5%; p = 0.012) and severe VDD (0% versus 12.2%; p = 0.033) were significantly lower in the 800 IU group. Clinical rickets developed in three (6.2%) infants in the 400 IU group. No infant developed VDT. Conclusions: Daily oral supplementation with 800 IU of vitamin D3 resulted in an almost 50% reduction in the proportion of infants with VDI and prevented the occurrence of severe VDD at 14 weeks of age compared to 400 IU with no evidence of vitamin D toxicity. Trial Registration: Clinical Trial Registry of India (CTRI/2019/02/017374). What is Known: • Breastfeeding is the ideal source of nutrition for healthy-term breastfed infants; however, vitamin D content of breastmilk is suboptimal. • AAP recommends daily oral supplementation of 400 IU of vitamin D to all healthy-term breastfed infants; however, trials from high-income countries support insufficiency of this dose in maintaining serum 25-OH-D levels >20 ng/ml with no such information from low-middle-income countries. What is New: • 800 IU/day of oral vitamin D3 supplementation among term breastfed infants significantly reduces vitamin D insufficiency at 14 weeks' age as compared to the recommended dose of 400 IU/day. • This higher supplemental dose is safe with no evidence of vitamin D toxicity.
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Affiliation(s)
- Bharti Yadav
- Department of Neonatology, All India Institute of Medical Sciences, Jodhpur, Rajasthan, 342005, India
| | - Neeraj Gupta
- Department of Neonatology, All India Institute of Medical Sciences, Jodhpur, Rajasthan, 342005, India.
| | - Rohit Sasidharan
- Department of Neonatology, All India Institute of Medical Sciences, Jodhpur, Rajasthan, 342005, India
| | - Sivam Thanigainathan
- Department of Neonatology, All India Institute of Medical Sciences, Jodhpur, Rajasthan, 342005, India
| | - Purvi Purohit
- Department of Biochemistry, All India Institute of Medical Sciences, Jodhpur, Rajasthan, India
| | - Kuldeep Singh
- Department of Pediatrics, All India Institute of Medical Sciences, Jodhpur, Rajasthan, India
| | - Praveen Sharma
- Department of Biochemistry, All India Institute of Medical Sciences, Jodhpur, Rajasthan, India
| | - Arun Singh
- Department of Neonatology, All India Institute of Medical Sciences, Jodhpur, Rajasthan, 342005, India
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The adrenal steroid profile in adolescent depression: a valuable bio-readout? Transl Psychiatry 2022; 12:255. [PMID: 35717450 PMCID: PMC9206671 DOI: 10.1038/s41398-022-01966-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Revised: 04/27/2022] [Accepted: 05/04/2022] [Indexed: 12/05/2022] Open
Abstract
There is preliminary evidence that adrenal steroids other than cortisol may be valuable biomarkers for major depressive disorder (MDD). So far, studies have been conducted in adults only, and conclusions are limited, mainly due to small sample sizes. Therefore, the present study assessed whether adrenal steroids serve as biomarkers for adolescent MDD. In 261 depressed adolescents (170 females) treated at a single psychiatric hospital, serum adrenal steroids (progesterone, 17-hydroxyprogesterone, 21-deoxycortisol, 11-deoxycortisol, cortisol, cortisone, deoxycorticosterone, corticosterone) were determined by liquid chromatography-tandem mass spectrometry. Findings were compared to that of an age- and sex-matched reference cohort (N = 255) by nonparametric analysis of variance. Nonparametric receiver operating characteristics (ROC) analyses were conducted to evaluate the diagnostic performance of single steroids and steroid ratios to classify depression status. Sensitivity analyses considered important confounders of adrenal functioning, and ROC results were verified by cross-validation. Compared to the reference cohort, levels of deoxycorticosterone and 21-deoxycortisol were decreased (P < 0.001). All other glucocorticoid- and mineralocorticoid-related steroids were increased (P < 0.001). The corticosterone to deoxycorticosterone ratio evidenced excellent classification characteristics, especially in females (AUC: 0.957; sensitivity: 0.902; specificity: 0.891). The adrenal steroid metabolome qualifies as a bio-readout reflecting adolescent MDD by a distinct steroid pattern that indicates dysfunction of the hypothalamus-pituitary-adrenal axis. Moreover, the corticosterone to deoxycorticosterone ratio may prospectively qualify to contribute to precision medicine in psychiatry by identifying those patients who might benefit from antiglucocorticoid treatment or those at risk for recurrence when adrenal dysfunction has not resolved.
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Qiongwen Z, Ying H. Bipolar disorder cured by vitamin D supplementation in a 15-year-old boy: A case report. Bipolar Disord 2022; 24:334-336. [PMID: 34624166 DOI: 10.1111/bdi.13143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zhu Qiongwen
- Department of Pharmacy, Aged Care Hospital Zhejiang, Zhejiang, China.,Clinical Pharmacy Center (Pharmacy Department), Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Zhejiang, China
| | - Hu Ying
- Clinical Pharmacy Center (Pharmacy Department), Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Zhejiang, China
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Sherief LM, Ali A, Gaballa A, Abdellatif GM, Kamal NM, Afify MR, Abdelmalek DH, El-Emari SA, Soliman AS, Mokhtar WA. Vitamin D status and healthy Egyptian adolescents: Where do we stand? Medicine (Baltimore) 2021; 100:e26661. [PMID: 34398026 PMCID: PMC8294863 DOI: 10.1097/md.0000000000026661] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/07/2020] [Accepted: 06/25/2021] [Indexed: 01/04/2023] Open
Abstract
Vitamin D deficiency is a worldwide public health problem. Low vitamin D and its consequences among children and adolescents could be considered as one of the most important health-related problems. This study aimed to estimate the prevalence of vitamin D deficiency in healthy Egyptian adolescents and investigate factors associated with vitamin D status.A cross-sectional study was conducted on 572 school children (270 males and 302 females) aged 14 to 18 years, who were randomly selected from high schools in one governorate in Egypt. Data were collected through a self-administered questionnaire. Vitamin D level, serum calcium, phosphorus, alkaline phosphates were measured.Vitamin D deficiency was almost present in all the studied Egyptian healthy adolescents (99%), 94.8% had vitamin D deficiency and 4.2% had vitamin D insufficiency. Girls had a higher prevalence of vitamin D deficiency than boys. There was a significant association between lack of physical activity, sun exposure, and vitamin D deficiency.Vitamin D deficiency and insufficiency are highly prevalent. In sunny countries, the special pattern of conservative clothing and the lack of outdoor physical activity might be the underlying factors for the high prevalence in females. Vitamin D supplementation seems to be mandatory to halt the problem.
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Affiliation(s)
| | - Adel Ali
- Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Ahmed Gaballa
- Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | | | | | - Mona R. Afify
- Department of Medical Microbiology & Parasitology, College of Medicine, University of Jeddah, Jeddah, Saudi Arabia
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Libuda L, Hebebrand J, Föcker M, Peters T, Hinney A. [Nutrition and mental health - how findings from genetic studies can support the identification of dietary effects]. ZEITSCHRIFT FUR KINDER-UND JUGENDPSYCHIATRIE UND PSYCHOTHERAPIE 2021; 50:217-226. [PMID: 34114882 DOI: 10.1024/1422-4917/a000807] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Nutrition and mental health - how findings from genetic studies can support the identification of dietary effects Abstract. Introduction: Numerous studies indicate that dietary interventions could be an important approach to the prevention and treatment of mental disorders. However, conventional nutritional epidemiological approaches (e. g., observational studies and randomized controlled trials, RCTs) have specific limitations to consider when interpreting the results. This article examines whether genetic studies could help to establish a link between diet and the prevention of mental disorders. Furthermore, it examines whether it is possible to draw conclusions about causal relationships. Methods: This narrative review describes various approaches of genetic cross-phenotype studies and presents examples of their applications in nutritional psychiatry. In addition, it discusses specific requirements as well as the strengths and limitations of the respective approaches. Results: To date, in the context of nutritional psychiatry, genetic correlation analyses, look-up analyses, and Mendelian randomization (MR) studies have been used for genetic crossphenotype analyses. Genetic correlation and look-up analyses provide initial evidence of possible overlap between specific mental disorders and metabolic pathways or specific nutrients. MR studies are used for detailed analyses that aim to identify causal relationships. However, MR is based on specific assumptions that must be met and considered when results are interpreted. Conclusion: Genetic cross-phenotype analyses are a useful amendment to conventional nutritional epidemiological research. In particular, positive results from MR studies provide an important fundament for identifying and developing suitable dietary interventions, which in turn increases the chance of success upon testing in subsequent RCTs. Accordingly, genetic cross-phenotype analyses are important instruments for increasing the efficiency in nutritional psychiatric research.
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Affiliation(s)
- Lars Libuda
- Klinik für Psychiatrie, Psychosomatik und Psychotherapie des Kindes- und Jugendalters, LVR-Klinikum Essen, Kliniken und Institut der Universität Duisburg-Essen.,Institut für Ernährung, Konsum und Gesundheit, Fakultät für Naturwissenschaften, Universität Paderborn
| | - Johannes Hebebrand
- Klinik für Psychiatrie, Psychosomatik und Psychotherapie des Kindes- und Jugendalters, LVR-Klinikum Essen, Kliniken und Institut der Universität Duisburg-Essen
| | - Manuel Föcker
- Klinik für Kinder- und Jugendpsychiatrie Psychosomatik und Psychotherapie, Universitätsklinikum Münster, Universität Münster
| | - Triinu Peters
- Klinik für Psychiatrie, Psychosomatik und Psychotherapie des Kindes- und Jugendalters, LVR-Klinikum Essen, Kliniken und Institut der Universität Duisburg-Essen
| | - Anke Hinney
- Klinik für Psychiatrie, Psychosomatik und Psychotherapie des Kindes- und Jugendalters, LVR-Klinikum Essen, Kliniken und Institut der Universität Duisburg-Essen
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Mergl R, Dogan-Sander E, Willenberg A, Wirkner K, Kratzsch J, Riedel-Heller S, Allgaier AK, Hegerl U, Sander C. The effect of depressive symptomatology on the association of vitamin D and sleep. BMC Psychiatry 2021; 21:178. [PMID: 33823823 PMCID: PMC8025511 DOI: 10.1186/s12888-021-03176-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Accepted: 03/19/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Sleep disorders and vitamin D deficiency are highly prevalent health problems. Few studies examined the effect of vitamin D concentrations on objectively measured sleep with high methodological quality and temporal proximity. Previous analysis within the LIFE-Adult-Study suggested that a lower concentration of serum vitamin D was associated with both shorter and later night sleep. However, no conclusion about underlying mechanisms could be drawn. We addressed the question whether this relationship is explained by the presence of depressive syndromes, which are linked to both vitamin D deficiency and sleep disturbances. METHODS It was investigated whether the association of vitamin D concentrations and night sleep parameters is mediated or moderated by depressive symptomatology. We investigated a subset (n = 1252) of the community sample from the LIFE-Adult-Study, in which sleep parameters had been objectively assessed using actigraphy, based on which two sleep parameters were calculated: night sleep duration and midsleep time. Serum 25(OH) D concentrations were measured using an electrochemiluminescence immunoassay. Depressive symptomatology was evaluated with the Centre for Epidemiological Studies Depression Scale. The mediation effect was analyzed by using Hayes' PROCESS macro tool for SPSS for Windows. RESULTS The depressive symptomatology was neither significantly associated with night sleep duration nor midsleep time. The associations between vitamin D concentrations and night sleep duration/midsleep time through mediation by depressive symptomatology were not significant. Corresponding moderator analyses were also non-significant. CONCLUSION The associations between vitamin D concentrations and night sleep parameters (sleep duration and midsleep time) seem to be neither mediated nor moderated by depressive symptomatology.
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Affiliation(s)
- Roland Mergl
- grid.7752.70000 0000 8801 1556Institute of Psychology, Universität der Bundeswehr München, Neubiberg, Germany
| | - Ezgi Dogan-Sander
- Department of Psychiatry and Psychotherapy, University of Leipzig Medical Centre, Semmelweisstrasse 10, D-04103, Leipzig, Germany.
| | - Anja Willenberg
- grid.9647.c0000 0004 7669 9786Institute of Laboratory Medicine, Chemistry and Molecular Diagnostics, University of Leipzig Medical Center, Leipzig, Germany
| | - Kerstin Wirkner
- grid.9647.c0000 0004 7669 9786LIFE - Leipzig Research Center for Civilization Diseases, University of Leipzig, Leipzig, Germany ,grid.9647.c0000 0004 7669 9786Institute for Medical Informatics, Statistics and Epidemiology (IMISE), University of Leipzig, Leipzig, Germany
| | - Jürgen Kratzsch
- grid.9647.c0000 0004 7669 9786Institute of Laboratory Medicine, Chemistry and Molecular Diagnostics, University of Leipzig Medical Center, Leipzig, Germany ,grid.9647.c0000 0004 7669 9786LIFE - Leipzig Research Center for Civilization Diseases, University of Leipzig, Leipzig, Germany
| | - Steffi Riedel-Heller
- grid.9647.c0000 0004 7669 9786LIFE - Leipzig Research Center for Civilization Diseases, University of Leipzig, Leipzig, Germany ,grid.9647.c0000 0004 7669 9786Institute of Social Medicine, Occupational Health and Public Health, University of Leipzig, Leipzig, Germany
| | - Antje-Kathrin Allgaier
- grid.7752.70000 0000 8801 1556Institute of Psychology, Universität der Bundeswehr München, Neubiberg, Germany
| | - Ulrich Hegerl
- grid.7839.50000 0004 1936 9721Department of Psychiatry, Psychosomatics, and Psychotherapy, Goethe University Frankfurt, Frankfurt am Main, Germany
| | - Christian Sander
- grid.9647.c0000 0004 7669 9786Department of Psychiatry and Psychotherapy, University of Leipzig Medical Centre, Semmelweisstrasse 10, D-04103 Leipzig, Germany ,grid.9647.c0000 0004 7669 9786LIFE - Leipzig Research Center for Civilization Diseases, University of Leipzig, Leipzig, Germany
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The Effect of Omega-3 Fatty Acids on Thromboxane, Brain-Derived Neurotrophic Factor, Homocysteine, and Vitamin D in Depressive Children and Adolescents: Randomized Controlled Trial. Nutrients 2021; 13:nu13041095. [PMID: 33801688 PMCID: PMC8066966 DOI: 10.3390/nu13041095] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Revised: 03/18/2021] [Accepted: 03/24/2021] [Indexed: 12/18/2022] Open
Abstract
In the DEPOXIN project, we have found that a high ratio of omega-6/omega-3 fatty acids (FA) is associated with worsening of depressive symptoms in children and adolescents with depressive disorder (DD) and that the 12-week omega-3 FA supplementation modulates DD symptoms. Here we present our results of the secondary outcomes: the levels of thromboxane (TXB), brain-derived neurotrophic factor (BDNF), homocysteine (HCy) and vitamin D. Fifty-eight patients were randomized into two arms. One group received a fish oil emulsion enriched with omega-3 FA, and the other received a sunflower oil emulsion containing omega-6 FA, for 12 weeks. Depressive symptoms were evaluated, using the Child's Depressive Inventory (CDI). The patients with DD had elevated TXB levels and decreased vitamin D levels, as compared to healthy controls. Both CDI and omega-6/omega-3 ratio correlated positively with TXB and negatively with BDNF at baseline. Compared to the omega-6 FA group, the supplementation with omega-3 FA for 12 weeks significantly reduced plasma TXB (p = 0.024) and increased BDNF (p = 0.011) levels. No changes in HCy and vitamin D were observed. Our results demonstrate the possible role of TXB and BDNF in the pathophysiology of DD and the benefits of omega-3 FA supplementation. The study was registered with the ISRCTN registry (ISRCTN81655012).
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Libuda L, Timmesfeld N, Antel J, Hirtz R, Bauer J, Führer D, Zwanziger D, Öztürk D, Langenbach G, Hahn D, Ring S, Peters T, Hinney A, Bühlmeier J, Hebebrand J, Grasemann C, Föcker M. Effect of vitamin D deficiency on depressive symptoms in child and adolescent psychiatric patients: results of a randomized controlled trial. Eur J Nutr 2020; 59:3415-3424. [PMID: 32108263 PMCID: PMC7669774 DOI: 10.1007/s00394-020-02176-6] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Accepted: 01/03/2020] [Indexed: 12/21/2022]
Abstract
PURPOSE While observational studies revealed inverse associations between serum vitamin D levels [25(OH)D] and depression, randomized controlled trials (RCT) in children and adolescents are lacking. This RCT examined the effect of an untreated vitamin D deficiency compared to an immediate vitamin D3 supplementation on depression scores in children and adolescents during standard day and in-patient psychiatric treatment. METHODS Patients with vitamin D deficiency [25(OH)D ≤ 30 nmol/l] and at least mild depression [Beck Depression Inventory II (BDI-II) > 13] (n = 113) were 1:1 randomized into verum (VG; 2640 IU vitamin D3/d) or placebo group (PG) in a double-blind manner. During the intervention period of 28 days, both groups additionally received treatment as usual. BDI-II scores were assessed as primary outcome, DISYPS-II (Diagnostic System for Mental Disorders in Childhood and Adolescence, Self- and Parent Rating) and serum total 25(OH)D were secondary outcomes. RESULTS At admission, 49.3% of the screened patients (n = 280) had vitamin D deficiency. Although the intervention led to a higher increase of 25(OH)D levels in the VG than in the PG (treatment difference: + 14 ng/ml; 95% CI 4.86-23.77; p = 0.003), the change in BDI-II scores did not differ (+ 1.3; 95% CI - 2.22 to 4.81; p = 0.466). In contrast, DISYPS parental ratings revealed pronounced improvements of depressive symptoms in the VG (- 0.68; 95% CI - 1.23 to - 0.13; p = 0.016). CONCLUSION Whereas this study failed to show a vitamin D supplementation effect on self-rated depression in adolescent in- or daycare patients, parents reported less depressive symptoms in VG at the end of our study. Future trials should consider clinician-rated depressive symptoms as primary outcome. TRIAL REGISTRATION "German Clinical Trials Register" ( https://www.drks.de ), registration number: DRKS00009758.
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Affiliation(s)
- Lars Libuda
- Department of Child and Adolescent Psychiatry, University Hospital Essen, University of Duisburg-Essen, Virchowstr. 174, 45147, Essen, Germany.
- Research Institute for the Prevention of Allergies and Respiratory Diseases in Childhood, Department of Pediatrics, Marien-Hospital Wesel, Wesel, Germany.
| | - Nina Timmesfeld
- Institute of Medical Biometry and Epidemiology, Philipps-University Marburg, Marburg, Germany
- Department of Medical Informatics, Biometrics and Epidemiology, Ruhr University Bochum, Bochum, Germany
| | - Jochen Antel
- Department of Child and Adolescent Psychiatry, University Hospital Essen, University of Duisburg-Essen, Virchowstr. 174, 45147, Essen, Germany
| | - Raphael Hirtz
- Department of Child and Adolescent Psychiatry, University Hospital Essen, University of Duisburg-Essen, Virchowstr. 174, 45147, Essen, Germany
- Pediatric Endocrinology and Diabetology, Klinik für Kinderheilkunde II, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Jens Bauer
- Pediatric Endocrinology and Diabetology, Klinik für Kinderheilkunde II, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Dagmar Führer
- Department of Endocrinology, Diabetes and Metabolism, Division of Laboratory Research, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Denise Zwanziger
- Department of Endocrinology, Diabetes and Metabolism, Division of Laboratory Research, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Dana Öztürk
- Department of Child and Adolescent Psychiatry, University Hospital Essen, University of Duisburg-Essen, Virchowstr. 174, 45147, Essen, Germany
| | - Gina Langenbach
- Department of Child and Adolescent Psychiatry, University Hospital Essen, University of Duisburg-Essen, Virchowstr. 174, 45147, Essen, Germany
| | - Denise Hahn
- Department of Child and Adolescent Psychiatry, University Hospital Essen, University of Duisburg-Essen, Virchowstr. 174, 45147, Essen, Germany
| | - Stefanie Ring
- Department of Child and Adolescent Psychiatry, University Hospital Essen, University of Duisburg-Essen, Virchowstr. 174, 45147, Essen, Germany
| | - Triinu Peters
- Department of Child and Adolescent Psychiatry, University Hospital Essen, University of Duisburg-Essen, Virchowstr. 174, 45147, Essen, Germany
| | - Anke Hinney
- Department of Child and Adolescent Psychiatry, University Hospital Essen, University of Duisburg-Essen, Virchowstr. 174, 45147, Essen, Germany
| | - Judith Bühlmeier
- Department of Child and Adolescent Psychiatry, University Hospital Essen, University of Duisburg-Essen, Virchowstr. 174, 45147, Essen, Germany
| | - Johannes Hebebrand
- Department of Child and Adolescent Psychiatry, University Hospital Essen, University of Duisburg-Essen, Virchowstr. 174, 45147, Essen, Germany
| | - Corinna Grasemann
- Pediatric Endocrinology and Diabetology, Klinik für Kinderheilkunde II, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
- Children's Hospital, St. Josef-Hospital, Ruhr University Bochum, Bochum, Germany
| | - Manuel Föcker
- Department of Child and Adolescent Psychiatry, University Hospital Essen, University of Duisburg-Essen, Virchowstr. 174, 45147, Essen, Germany
- Department of Child and Adolescent Psychiatry, University Hospital Münster, Münster, Germany
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Zhou YT, Li SS, Ai M, Chen H, Liu YX, Li BY, Zhao Y, Cai WW, Hou B, Ni LL, Xu F, Qiu LY. 1,25(OH)2D3 mitigate cancer-related fatigue in tumor-bearing mice: Integrating network pharmacological analysis. Biomed Pharmacother 2020; 128:110256. [DOI: 10.1016/j.biopha.2020.110256] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2020] [Revised: 05/06/2020] [Accepted: 05/10/2020] [Indexed: 12/19/2022] Open
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Shakya PR, Melaku YA, Page AJ, Gill TK. Nutrient patterns and depressive symptoms among Australian adults. Eur J Nutr 2020; 60:329-343. [PMID: 32328747 DOI: 10.1007/s00394-020-02243-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2019] [Accepted: 04/01/2020] [Indexed: 12/29/2022]
Abstract
PURPOSE Much of the current literature on the associations between diet and depression focus on single nutrients rather than nutrient patterns (NPs). We investigated the association between NPs and depressive symptoms (DepS) in an Australian adult population. METHODS DepS were examined at two different time points, in 2010 (Stage 3, n = 1743, 49.0% males) and 2015 [North West 2015 (NW15), n = 1,024, 46.6% males] of the North West Adelaide Health Study (NWAHS). Dietary habits were evaluated using a food frequency questionnaire (FFQ) at Stage 3. DepS were assessed using the Center for Epidemiological Studies Depression (CES-D) scale at Stage 3 and NW15. Principal component analysis was used to identify NPs as well as the factor structure of the CES-D. Log- and negative binomial regression analyses were used to assess the association between NPs and DepS scores. Ordinal logistic regression analysis was undertaken between the NPs and identified factors of the CES-D score. RESULTS Three NPs (from the FFQ) and two-factors (from the CES-D score) were obtained. After adjusting for known confounding variables, a 'plant-sourced' NP (β-carotene, fibre, vitamin C, potassium and α-carotene) was inversely associated with DepS at Stage 3 [prevalence ratio (PR)Q4VsQ1, 0.78; 95% CI 0.66-0.92; p = 0.003], whereas an 'animal-sourced' (ω-3 fatty acid, monounsaturated fat, vitamin E and cholesterol) or 'mixed-source' (phosphorous, protein, vitamin B2, iodine and zinc) NP was not associated with DepS. There was an inverse relationship between the 'plant-sourced' NP and the '(absence of) positive-affect' factor from the CES-D in both stages. CONCLUSION The 'plant-sourced' NP is consistently and inversely associated with DepS; however, longitudinal studies are recommended to confirm these results.
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Affiliation(s)
- Prem R Shakya
- Vagal Afferent Research Group, University of Adelaide, Adelaide, 5005, SA, Australia.,Diabetes, Nutrition and Gut Health, Lifelong Health, South Australian Health and Medical Research Institute (SAHMRI), Adelaide, 5005, SA, Australia
| | - Yohannes A Melaku
- Adelaide Institute for Sleep Health, College of Medicine and Public Health, Flinders University, Bedford Park, 5042, SA, Australia
| | - Amanda J Page
- Vagal Afferent Research Group, University of Adelaide, Adelaide, 5005, SA, Australia.,Diabetes, Nutrition and Gut Health, Lifelong Health, South Australian Health and Medical Research Institute (SAHMRI), Adelaide, 5005, SA, Australia
| | - Tiffany K Gill
- Adelaide Medical School, University of Adelaide, Adelaide, 5005, SA, Australia.
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Menon V, Kar SK, Suthar N, Nebhinani N. Vitamin D and Depression: A Critical Appraisal of the Evidence and Future Directions. Indian J Psychol Med 2020; 42:11-21. [PMID: 31997861 PMCID: PMC6970300 DOI: 10.4103/ijpsym.ijpsym_160_19] [Citation(s) in RCA: 62] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Revised: 05/31/2019] [Accepted: 05/31/2019] [Indexed: 12/30/2022] Open
Abstract
BACKGROUND Growing evidence points to the role of vitamin D in the pathobiology and treatment of depression. However, the evidence is inconsistent in many aspects. The objectives of this narrative review were to evaluate the state of the evidence, synthesize the knowledge gaps, and formulate recommendations for more enhanced research in this growing area. METHODS Electronic searches of MEDLINE via PubMed, Cochrane Library, and Google Scholar databases were carried out from inception till February 2019 to identify relevant English language peer-reviewed articles. Abstracts generated were systematically screened for eligibility. Included articles were grouped under three broad themes: The association between vitamin D and depression, its biological underpinnings, and trials evaluating the efficacy of vitamin D supplementation in depression. Relevant data were extracted as per a structured proforma. RESULTS A total of 61 articles were included in the present review. Overall findings were that there is a relationship between vitamin D and depression, though the directionality of this association remains unclear. The association appears to be driven by the homeostatic, trophic, and immunomodulatory effects of vitamin D. Evidence from supplementation trials suggest a more robust therapeutic effect on subjects with major depression and concurrent vitamin D deficiency. CONCLUSION Serum vitamin D levels inversely correlate with clinical depression, but the evidence is not strong enough to recommend universal supplementation in depression. Enriching depression treatment trials with subjects having concurrent vitamin D deficiency appears to be a potential step forward in identifying subgroups who may maximally benefit from this approach.
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Affiliation(s)
- Vikas Menon
- Department of Psychiatry, Jawaharlal Institute of Post Graduate Medical Education and Research (JIPMER), Dhanvantri Nagar, Puducherry, India
| | - Sujita Kumar Kar
- Department of Psychiatry, King George's Medical University, Lucknow, Uttar Pradesh, India
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Cullen KR, Padilla LE, Papke VN, Klimes-Dougan B. New Somatic Treatments for Child and Adolescent Depression. CURRENT TREATMENT OPTIONS IN PSYCHIATRY 2019; 6:380-400. [PMID: 33312841 PMCID: PMC7732147 DOI: 10.1007/s40501-019-00194-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
PURPOSE OF REVIEW Depression is a common clinical problem in youth, with prevalence increasing significantly during the adolescent period. Although several evidence-based treatments are currently available for treating depression in adults, only a subset of these have been investigated in a pediatric sample. Unfortunately, even well-established, first-line interventions do not lead to sufficient treatment response for many children and adolescents suffering from depression. However, recent research has been conducted in the area of somatic treatments for youth with depression. This review focuses on current (past three years, including published results and ongoing studies) research on somatic treatments for adolescent depression in the following categories: psychopharmacology, nutraceuticals, interventions implicating motor and sensory systems, and neuromodulation. FINDINGS Results from recent randomized, controlled trials testing psychopharmacological options suggest that while antidepressants that have been recently approved for adult patients are safe and tolerable in children and adolescents, none have yet outperformed performed placebo in efficacy. Nutraceuticals, motor-sensory interventions, and neuromodulation techniques, present safe and promising results, but few have been tested against controls to support effectiveness over current treatment options. SUMMARY This review of research on pediatric depression treatment from the past 3 years highlights some disappointments (negative results following some of the well-designed clinical trials) and gaps (preliminary studies in need of follow up with robust methodology) but also some promising directions in research of the efficacyof these treatments in a pediatric sample. We offer suggestions for future research including consideration of treatment timing, sequencing, the role of symptom severity in directing treatment selection, the potential value of combined treatments, consideration of how to best account for high placebo response rates, and the incorporation of neurobiological assessments to examine mechanisms and biomarker predictors of treatment response.
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Affiliation(s)
- Kathryn R Cullen
- Department of Psychiatry, University of Minnesota, F282/2A West Building 2450, Riverside Avenue South, Minneapolis, MN 55454, USA
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Vitamin D and the Risk of Depression: A Causal Relationship? Findings from a Mendelian Randomization Study. Nutrients 2019; 11:nu11051085. [PMID: 31100827 PMCID: PMC6566390 DOI: 10.3390/nu11051085] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Revised: 05/10/2019] [Accepted: 05/14/2019] [Indexed: 12/18/2022] Open
Abstract
While observational studies show an association between 25(OH)vitamin D concentrations and depressive symptoms, intervention studies, which examine the preventive effects of vitamin D supplementation on the development of depression, are lacking. To estimate the role of lowered 25(OH)vitamin D concentrations in the etiology of depressive disorders, we conducted a two-sample Mendelian randomization (MR) study on depression, i.e., “depressive symptoms” (DS, n = 161,460) and “broad depression” (BD, n = 113,769 cases and 208,811 controls). Six single nucleotide polymorphisms (SNPs), which were genome-wide significantly associated with 25(OH)vitamin D concentrations in 79,366 subjects from the SUNLIGHT genome-wide association study (GWAS), were used as an instrumental variable. None of the six SNPs was associated with DS or BD (all p > 0.05). MR analysis revealed no causal effects of 25(OH)vitamin D concentration, either on DS (inverse variance weighted (IVW); b = 0.025, SE = 0.038, p = 0.52) or on BD (IVW; b = 0.020, SE = 0.012, p = 0.10). Sensitivity analyses confirmed that 25(OH)vitamin D concentrations were not significantly associated with DS or BD. The findings from this MR study indicate no causal relationship between vitamin D concentrations and depressive symptoms, or broad depression. Conflicting findings from observational studies might have resulted from residual confounding or reverse causation.
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