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Stachura A, Banaszek Ł, Jurkin K, Święcicki Ł. Vitamin B12 overdose may trigger the onset of mixed-state bipolar disorder: A case report. Bipolar Disord 2024; 26:293-295. [PMID: 38514458 DOI: 10.1111/bdi.13424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/23/2024]
Affiliation(s)
- Albert Stachura
- II Psychiatric Clinic, Institute of Psychiatry and Neurology, Warsaw, Poland
- Department of Methodology, Medical University of Warsaw, Warsaw, Poland
- Doctoral School, Medical University of Warsaw, Warsaw, Poland
| | - Łukasz Banaszek
- Department of Methodology, Medical University of Warsaw, Warsaw, Poland
| | - Katarzyna Jurkin
- II Psychiatric Clinic, Institute of Psychiatry and Neurology, Warsaw, Poland
| | - Łukasz Święcicki
- II Psychiatric Clinic, Institute of Psychiatry and Neurology, Warsaw, Poland
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Zhang YX, Yang LP, Gai C, Cheng CC, Guo ZY, Sun HM, Hu D. Association between variants of MTHFR genes and psychiatric disorders: A meta-analysis. Front Psychiatry 2022; 13:976428. [PMID: 36061291 PMCID: PMC9433753 DOI: 10.3389/fpsyt.2022.976428] [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: 06/23/2022] [Accepted: 07/28/2022] [Indexed: 11/22/2022] Open
Abstract
Background Psychiatric disorders have seriously affected human life, one of the risk genes related to psychosis is the methylenetetrahydrofolatereductase (MTHFR) gene. This gene has a potential role in psychiatric disorders. Therefore, a meta-analysis is conducted to investigate the correlations between two prevalent MTHFR single nucleotide polymorphisms (SNPs), MTHFR C677T, A1298C, severe psychological disorders (schizophrenia, major depression, bipolar disorder). Methods A total of 81 published studies were screened and selected by a search of electronic databases up to April 2022. Odds ratios (ORs) with 95% confidence intervals (CIs) were used to assess the association between MTHFR polymorphism and psychiatric disorders susceptibility by using random effect models. Results We found that MTHFR C677T polymorphism is significantly related to schizophrenia and major depression in the overall population. MTHFR C677T has been linked to an increased risk of bipolar disorder in the recessive model (TT vs. CT + CC). Ethnic subgroup analysis shows that schizophrenia and major depression significantly correlate with MTHFR C677T and A1298C in Asian populations but not Caucasians. Besides, schizophrenia is correlated substantially with MTHFR C677T in the African population. However, the MTHFR A1298C polymorphism is only marginally linked to major depression. Conclusion Findings of the current study revealed that MTHFR may contribute to the common pathogenesis of psychiatric diseases and that its variants may be essential in controlling the expression of psychosis-related genes. This study could help the researchers and health specialists in the early diagnosis and treatment of psychiatric disorders.
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Affiliation(s)
- Yu-Xin Zhang
- Department of Anatomy, School of Chinese Medicine, Beijing University of Chinese Medicine, Beijing, China
- Department of Endocrinology, Guang’anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, China
| | - Lu-Ping Yang
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China
| | - Cong Gai
- Department of Anatomy, School of Chinese Medicine, Beijing University of Chinese Medicine, Beijing, China
| | - Cui-Cui Cheng
- Department of Anatomy, School of Chinese Medicine, Beijing University of Chinese Medicine, Beijing, China
| | - Zhen-yu Guo
- Department of Anatomy, School of Chinese Medicine, Beijing University of Chinese Medicine, Beijing, China
| | - Hong-Mei Sun
- Department of Anatomy, School of Chinese Medicine, Beijing University of Chinese Medicine, Beijing, China
| | - Die Hu
- Department of Anatomy, School of Chinese Medicine, Beijing University of Chinese Medicine, Beijing, China
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Meng X, Zheng JL, Sun ML, Lai HY, Wang BJ, Yao J, Wang H. Association between MTHFR (677C>T and 1298A>C) polymorphisms and psychiatric disorder: A meta-analysis. PLoS One 2022; 17:e0271170. [PMID: 35834596 PMCID: PMC9282595 DOI: 10.1371/journal.pone.0271170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Accepted: 06/25/2022] [Indexed: 11/30/2022] Open
Abstract
Recent studies showed that genetic polymorphism of 5,10-methylenetetrahydrofolate reductase (MTHFR) is related to attention-deficit hyperactivity disorder (ADHD), bipolar disorder (BD) and schizophrenia (SCZ). However, no consistent conclusion has been determined. This meta-analysis aims to interrogate the relationship between MTHFR gene polymorphisms (677C>T and 1298A>C) and the occurrence of ADHD, BD and SCZ. We retrieved case-control studies that met the inclusion criteria from the PubMed database. Associations between MTHFR polymorphisms (677C>T and 1298A>C) and ADHD, BD and SCZ were measured by means of odds ratios (ORs) using a random effects model and 95% confidence intervals (CIs). Additionally, sensitivity analysis and publication bias were performed. After inclusion criteria were met, a total of five studies with ADHD including 434 cases and 670 controls, 18 studies with BD including 4167 cases and 5901 controls and 44 studies with SCZ including 16,098 cases and 19913 controls were finally included in our meta-analysis. Overall, our meta-analytical results provided evidence that the MTHFR 677C>T was associated with occurrence of BD and SCZ, while the 1298A>C polymorphism was related to ADHD and BD, and additionally the sensitivity analysis indicated these results were stable and reliable. This may provide useful information for relevant studies on the etiology of psychiatric disorders.
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Affiliation(s)
- Xinyao Meng
- School of Basic Medicine, Shenyang Medical College, Shenyang, P.R. China
| | - Ji-long Zheng
- Department of Forensic Medicine, China Criminal Police College, Shenyang, P.R. China
| | - Mao-ling Sun
- School of Forensic Medicine, China Medical University, Shenyang, P.R. China
| | - Hai-yun Lai
- School of Forensic Medicine, China Medical University, Shenyang, P.R. China
| | - Bao-jie Wang
- School of Forensic Medicine, China Medical University, Shenyang, P.R. China
| | - Jun Yao
- School of Forensic Medicine, China Medical University, Shenyang, P.R. China
| | - Hongbo Wang
- School of Basic Medicine, Shenyang Medical College, Shenyang, P.R. China
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Esnafoglu E, Ozturan DD. The relationship of severity of depression with homocysteine, folate, vitamin B12, and vitamin D levels in children and adolescents. Child Adolesc Ment Health 2020; 25:249-255. [PMID: 32304285 DOI: 10.1111/camh.12387] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Revised: 12/06/2019] [Accepted: 03/10/2020] [Indexed: 01/22/2023]
Abstract
BACKGROUND Depression is a heterogeneous disorder and is thought to develop as a result of complex interactions between genetic and environmental factors. One-carbon metabolism that includes vitamin B12, folic acid, and homocysteine has been investigated in psychiatric disorders like depression. In recent years, vitamin D has also been considered to contribute to psychiatric disorders. In this study, serum levels of folate, vitamin B12, and homocysteine related to one-carbon metabolism and vitamin D were investigated in children and adolescents with depression and to assess possible roles in depression pathogenesis. METHODS The study included 89 children and adolescents with depression (69 female, 20 male; mean age ± SD = 15.08 ± 1.46) and 43 control subjects (31 female, 12 male; mean age ± SD = 14.41 ± 2.32) without any DSM-5 diagnosis. Each subject completed a sociodemographic form, Childhood Depression Inventory, State-Trait Anxiety Inventory 1-2 and measured serum folate, vitamin B12, homocysteine, and 25-OH vitamin D levels. RESULTS There was no significant difference between the groups in terms of folate levels (p = .052). In the patient group, the vitamin B12 and vitamin D levels were clearly low (p values for both levels were <.001), while homocysteine levels were found to be remarkably high (p < .001). In addition, there was a negative correlation between depression severity and vitamin B12 and vitamin D, while a positive correlation was found with homocysteine. CONCLUSIONS The results of the study show that vitamin B12 deficiency or insufficiency and elevated homocysteine may contribute to the etiopathogenesis of depression. Additionally, it was shown that lower vitamin D levels may be associated with depression. KEY PRACTITIONER MESSAGE Depression of children and adolescents is associated with the interaction of environmental and genetic factors. Homocysteine, vitamin B12, and folate related to one-carbon metabolism are associated with psychiatric disorders such as depression in adulthood. Vitamin D also contributes to psychiatric disorders pathogenesis. There are not enough studies in the literature about these parameters in children with depression. Low vitamin B12 and vitamin D levels and increased homocysteine levels may play a role in the pathogenesis of depression in children and adolescents. Investigation of vitamin B12, folate, homocysteine, and vitamin D levels are recommended in children and adolescents with depression.
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Affiliation(s)
- Erman Esnafoglu
- Department of Child and Adolescent Psychiatry, Faculty of Medicine, Ordu University, Ordu, Turkey
| | - Deniz Deniz Ozturan
- Department of Psychiatry, Faculty of Medicine, Ordu University, Ordu, Turkey
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Salagre E, Vizuete A, Leite M, Brownstein D, McGuinness A, Jacka F, Dodd S, Stubbs B, Köhler C, Vieta E, Carvalho A, Berk M, Fernandes B. Homocysteine as a peripheral biomarker in bipolar disorder: A meta-analysis. Eur Psychiatry 2020; 43:81-91. [DOI: 10.1016/j.eurpsy.2017.02.482] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Revised: 02/13/2017] [Accepted: 02/14/2017] [Indexed: 12/13/2022] Open
Abstract
AbstractBackground:Bipolar disorder (BD) is a psychiatric disorder with an uncertain aetiology. Recently, special attention has been given to homocysteine (Hcy), as it has been suggested that alterations in 1-carbon metabolism might be implicated in diverse psychiatric disorders. However, there is uncertainty regarding possible alterations in peripheral Hcy levels in BD.Methods:This study comprises a meta-analysis comparing serum and plasma Hcy levels in persons with BD and healthy controls. We conducted a systematic search for all eligible English and non-English peer-reviewed articles.Results:Nine cross-sectional studies were included in the meta-analyses, providing data on 1547 participants. Random-effects meta-analysis showed that serum and plasma levels of Hcy were increased in subjects with BD in either mania or euthymia when compared to healthy controls, with a large effect size in the mania group (g= 0.98, 95% CI: 0.8–1.17,P< 0.001,n= 495) and a small effect in the euthymia group (g= 0.3, 95% CI: 0.11–0.48,P= 0.002,n= 1052).Conclusions:Our meta-analysis provides evidence that Hcy levels are elevated in persons with BD during mania and euthymia. Peripheral Hcy could be considered as a potential biomarker in BD, both of trait (since it is increased in euthymia), and also of state (since its increase is more accentuated in mania). Longitudinal studies are needed to clarify the relationship between bipolar disorder and Hcy, as well as the usefulness of peripheral Hcy as both a trait and state biomarker in BD.
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Hsieh YC, Chou LS, Lin CH, Wu HC, Li DJ, Tseng PT. Serum folate levels in bipolar disorder: a systematic review and meta-analysis. BMC Psychiatry 2019; 19:305. [PMID: 31640634 PMCID: PMC6805488 DOI: 10.1186/s12888-019-2269-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Accepted: 09/03/2019] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND Bipolar disorder (BD) is a major psychiatric illness, however its physiopathology is unclear. The role of folate in the physiopathology of BD is controversial. We conducted this systematic review and meta-analysis to investigate the effect of folate in BD patients. METHODS We performed a thorough literature study of the PubMed, Embase, ScienceDirect, ClinicalKey, Cochrane Library, ProQuest, Web of Science, and ClinicalTrials.gov databases until December 21st, 2018. Random effects meta-analysis was conducted. RESULTS Six articles involving 481 patients with BD and 760 controls were included. The meta-analysis results suggested that serum folate levels in the patients with BD were significantly lower than those in the controls (Hedges' g = - 0.211, 95% confidence interval = - 0.391 to - 0.031, p = 0.021). CONCLUSION The current meta-analysis show it might be association between lower serum folate levels and patient with BD. However, we could not distinguish the potentially confounding effects of mood states on the folate levels. Further prospective studies including subjects with different mood states and possible physiopathology are warranted to investigate the association between folate deficiency and the etiology of BD.
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Affiliation(s)
- Yung-Chi Hsieh
- 0000 0004 0582 5722grid.414813.bKaohsiung Municipal Kai-Syuan Psychiatric Hospital, No.130, Kaisyuan 2nd Rd., Lingya Dist, Kaohsiung City, 802 Taiwan
| | - Li-Shiu Chou
- 0000 0004 0582 5722grid.414813.bKaohsiung Municipal Kai-Syuan Psychiatric Hospital, No.130, Kaisyuan 2nd Rd., Lingya Dist, Kaohsiung City, 802 Taiwan
| | - Ching-Hua Lin
- 0000 0004 0582 5722grid.414813.bKaohsiung Municipal Kai-Syuan Psychiatric Hospital, No.130, Kaisyuan 2nd Rd., Lingya Dist, Kaohsiung City, 802 Taiwan
| | - Hung-Chi Wu
- 0000 0004 0582 5722grid.414813.bKaohsiung Municipal Kai-Syuan Psychiatric Hospital, No.130, Kaisyuan 2nd Rd., Lingya Dist, Kaohsiung City, 802 Taiwan
| | - Dian-Jeng Li
- Kaohsiung Municipal Kai-Syuan Psychiatric Hospital, No.130, Kaisyuan 2nd Rd., Lingya Dist, Kaohsiung City, 802, Taiwan.
| | - Ping-Tao Tseng
- WinShine Clinics in Specialty of Psychiatry, Kaohsiung City, Taiwan. .,Prospect Clinic for Otorhinolaryngology & Neurology, Kaohsiung City, Taiwan.
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Chen PH, Liu HC, Lu ML, Chen CH, Chang CJ, Chiu WC, Sun IW, Liu SI, Tsai SY, Chiu CC, Stewart R. Homocysteine, rather than age of onset, is a better predictor for cognitive function in older adults with bipolar disorder. Int J Geriatr Psychiatry 2019; 34:1473-1480. [PMID: 31111977 DOI: 10.1002/gps.5156] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/17/2019] [Accepted: 05/18/2019] [Indexed: 12/14/2022]
Abstract
OBJECTIVES The association between older-age bipolar disorder and cognitive impairments may be mediated by vascular burden. The aim of the study was to examine the difference of cognitive function between older people with late-onset bipolar disorder (LOBD) and early-onset bipolar disorder (EOBD) by considering rigorous vascular risk burden evaluation, comprehensive cognitive tests, and relevant biochemistry data. METHODS We recruited 95 outpatients aged over 55 with a DSM-IV-TR diagnosis of bipolar I disorder. Fifty had LOBD, defined by age of onset after 40. Cognitive function was evaluated through a battery of tests assessing verbal memory, attention/speed, visuospatial function, verbal fluency, and cognitive flexibility. Vascular risk assessments included individual disorders, 10-year Framingham cardiovascular risk scores, and serum levels of homocysteine, vitamin B12, folate, and triiodothyronine. RESULTS No differences were observed between LOBD and EOBD on any cognitive test after adjusting for potential confounders. In addition to age and educational years, multiple linear regression analyses indicated significantly negative associations between serum homocysteine levels and cognitive performances in attention, psychomotor speed, verbal memory, and executive function. CONCLUSIONS Among older people with bipolar disorder, LOBD is not associated with more cognitive dysfunction in this study. However, higher serum homocysteine levels were significantly associated with worse cognitive performance in this particular group. Clinicians therefore have to pay attention to the cognitive function in older bipolar patients with higher levels of homocysteine.
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Affiliation(s)
- Pao-Huan Chen
- Department of Psychiatry, Taipei Medical University Hospital, Taipei, Taiwan.,Department of Psychiatry, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Hsing-Cheng Liu
- Department of Psychiatry, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan.,Department of Psychiatry, Taipei City Psychiatric Center, Taipei City Hospital, Taipei, Taiwan
| | - Mong-Liang Lu
- Department of Psychiatry, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan.,Department of Psychiatry, Taipei Medical University-Wan Fang Hospital, Taipei, Taiwan
| | - Chun-Hsin Chen
- Department of Psychiatry, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan.,Department of Psychiatry, Taipei Medical University-Wan Fang Hospital, Taipei, Taiwan
| | - Ching-Jui Chang
- Department of Psychiatry, Cathay General Hospital, Taipei, Taiwan
| | - Wei-Che Chiu
- Department of Psychiatry, Cathay General Hospital, Taipei, Taiwan
| | - I-Wen Sun
- Department of Psychiatry, Mackay Memorial Hospital, Taipei, Taiwan
| | - Shen-Ing Liu
- Department of Psychiatry, Mackay Memorial Hospital, Taipei, Taiwan
| | - Shang-Ying Tsai
- Department of Psychiatry, Taipei Medical University Hospital, Taipei, Taiwan.,Department of Psychiatry, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Chih-Chiang Chiu
- Department of Psychiatry, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan.,Department of Psychiatry, Taipei City Psychiatric Center, Taipei City Hospital, Taipei, Taiwan
| | - Robert Stewart
- King's College London, Institute of Psychiatry, Psychology and Neuroscience, London, UK.,South London and Maudsley NHS Foundation Trust, London, UK
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Fusar-Poli L, Surace T, Vanella A, Meo V, Patania F, Furnari R, Signorelli MS, Aguglia E. The effect of adjunctive nutraceuticals in bipolar disorder: A systematic review of randomized placebo-controlled trials. J Affect Disord 2019; 252:334-349. [PMID: 30999090 DOI: 10.1016/j.jad.2019.04.039] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Revised: 03/11/2019] [Accepted: 04/07/2019] [Indexed: 02/07/2023]
Abstract
BACKGROUND Nutraceuticals are a group of compounds of growing interest for mental health professionals. Given the implication of certain nutrients in the onset of bipolar disorder, it has been hypothesized that nutraceuticals might be effective in improving symptoms of the condition (i.e. mania or depression). Our systematic review aimed to evaluate the effectiveness of adjunctive nutraceuticals compared to placebo. METHODS We searched the following databases from inception to February 2019: Web of Science, CINAHL, Embase, and PsycINFO. We included only original randomized controlled trials written in English, testing the efficacy of nutraceuticals in add-on to standard care, compared to placebo, in patients with bipolar disorder. RESULTS After identifying 6584 potentially relevant publications, we finally included 25 studies, among which six used fatty acids, seven micronutrients, seven amino acids. One study tested probiotics, while in four trials a combination of different types of nutraceuticals was used. Even if some compounds have shown promising results (i.e. fatty acids and N-acetyl cysteine for depression, amino acid drinks and folic acid for mania), the majority of nutraceuticals did not cause significant improvements in comparison to placebo. LIMITATIONS We could not perform a meta-analysis due to the high heterogeneity of trials, which were also affected by some methodological caveats. CONCLUSIONS Evidence regarding the efficacy of adjunctive nutraceuticals in bipolar disorder is inconsistent. Nevertheless, they appear generally free from relevant side effects. Well-designed trials are needed to further explore the potential role of nutraceuticals in different mood episodes.
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Affiliation(s)
- Laura Fusar-Poli
- Department of Clinical and Experimental Medicine, Psychiatry Unit, University of Catania, Italy; U.O.C. Clinica Psichiatrica, A.O.U. Policlinico-Vittorio Emanuele, Presidio "G. Rodolico", Catania, Italy.
| | - Teresa Surace
- Department of Clinical and Experimental Medicine, Psychiatry Unit, University of Catania, Italy; U.O.C. Clinica Psichiatrica, A.O.U. Policlinico-Vittorio Emanuele, Presidio "G. Rodolico", Catania, Italy
| | - Antonio Vanella
- Department of Clinical and Experimental Medicine, Psychiatry Unit, University of Catania, Italy; U.O.C. Clinica Psichiatrica, A.O.U. Policlinico-Vittorio Emanuele, Presidio "G. Rodolico", Catania, Italy
| | - Valeria Meo
- Department of Clinical and Experimental Medicine, Psychiatry Unit, University of Catania, Italy; U.O.C. Clinica Psichiatrica, A.O.U. Policlinico-Vittorio Emanuele, Presidio "G. Rodolico", Catania, Italy
| | - Federica Patania
- Department of Clinical and Experimental Medicine, Psychiatry Unit, University of Catania, Italy; U.O.C. Clinica Psichiatrica, A.O.U. Policlinico-Vittorio Emanuele, Presidio "G. Rodolico", Catania, Italy
| | - Rosaria Furnari
- Department of Clinical and Experimental Medicine, Psychiatry Unit, University of Catania, Italy; U.O.C. Clinica Psichiatrica, A.O.U. Policlinico-Vittorio Emanuele, Presidio "G. Rodolico", Catania, Italy
| | - Maria Salvina Signorelli
- Department of Clinical and Experimental Medicine, Psychiatry Unit, University of Catania, Italy; U.O.C. Clinica Psichiatrica, A.O.U. Policlinico-Vittorio Emanuele, Presidio "G. Rodolico", Catania, Italy
| | - Eugenio Aguglia
- Department of Clinical and Experimental Medicine, Psychiatry Unit, University of Catania, Italy; U.O.C. Clinica Psichiatrica, A.O.U. Policlinico-Vittorio Emanuele, Presidio "G. Rodolico", Catania, Italy
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Luo Z, Lu Z, Muhammad I, Chen Y, Chen Q, Zhang J, Song Y. Associations of the MTHFR rs1801133 polymorphism with coronary artery disease and lipid levels: a systematic review and updated meta-analysis. Lipids Health Dis 2018; 17:191. [PMID: 30115070 PMCID: PMC6097444 DOI: 10.1186/s12944-018-0837-y] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2018] [Accepted: 07/31/2018] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND The associations of the 5,10-methylenetetrahydrofolate reductase gene (MTHFR) rs1801133 polymorphism with coronary artery disease (CAD) and plasma lipid levels have been widely investigated, but the results were inconsistent and inconclusive. This meta-analysis aimed to clarify the relationships of the rs1801133 polymorphism with CAD and plasma lipid levels. METHODS By searching in PubMed, Google Scholar, Web of Science, Cochrane Library, Wanfang, VIP and CNKI databases, 123 studies (87,020 subjects) and 65 studies (85,554 subjects) were identified for the CAD association analysis and the lipid association analysis, respectively. Odds ratio (OR) and standardized mean difference (SMD) were used to determine the effects of the rs1801133 polymorphism on CAD risk and lipid levels, respectively. RESULTS The variant T allele of the rs1801133 polymorphism was associated with increased risk of CAD under allelic model [OR = 1.11, 95% confidence interval (CI) = 1.06-1.17, P < 0.01], additive model (OR = 1.25, 95% CI = 1.14-1.37, P < 0.01), dominant model (OR = 1.11, 95% CI = 1.04-1.17, P < 0.01), and recessive model (OR = 1.22, 95% CI = 1.12-1.32, P < 0.01). The T carriers had higher levels of total cholesterol (TC) (SMD = 0.04, 95% CI = 0.01-0.07, P = 0.02) and low-density lipoprotein cholesterol (LDL-C) (SMD = 0.07, 95% CI = 0.01-0.12, P = 0.01) than the non-carriers. CONCLUSIONS The meta-analysis suggested that the T allele of the rs1801133 polymorphism is a risk factor for CAD, which is possibly and partly mediated by abnormal lipid levels.
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Affiliation(s)
- Zhi Luo
- Department of Cardiology, Affiliated Hospital of North Sichuan Medical College, Nanchong, 637000, People's Republic of China
| | - Zhan Lu
- Department of Cardiology, Affiliated Hospital of North Sichuan Medical College, Nanchong, 637000, People's Republic of China
| | - Irfan Muhammad
- Department of Cardiology, Affiliated Hospital of North Sichuan Medical College, Nanchong, 637000, People's Republic of China
| | - Yun Chen
- Department of Cardiology, Affiliated Hospital of North Sichuan Medical College, Nanchong, 637000, People's Republic of China
| | - Qiuhong Chen
- School of Clinical Medicine, North Sichuan Medical College, Nanchong, 637000, People's Republic of China
| | - Jiaojiao Zhang
- School of Clinical Medicine, North Sichuan Medical College, Nanchong, 637000, People's Republic of China
| | - Yongyan Song
- Department of Medical Biochemistry, School of Preclinical Medicine, North Sichuan Medical College, Nanchong, 637000, People's Republic of China.
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Sazci A, Sazci G, Sazci B, Ergul E, Idrisoglu HA. Nicotinamide-N-Methyltransferase gene rs694539 variant and migraine risk. J Headache Pain 2016; 17:93. [PMID: 27726107 PMCID: PMC5056911 DOI: 10.1186/s10194-016-0688-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2016] [Accepted: 10/06/2016] [Indexed: 12/15/2022] Open
Abstract
Background Migraine is a common neurovascular disorder affecting 10 to 20 % of the world population usually subdivided into migraine with auro (MA) and migraine without auro (MO). Homocysteine is involved in the pathophysiology of a number of neurological disorders. Elevated levels of homocysteine in the plasma is produced by the MTHFR gene rs 1801133 and rs 1801131 variants as well as the NNMT gene rs 694539 variant. Methods With the polymerase chain reaction-restriction fragment length polymorphism method developed recently in our laboratory, we were able to show an association between the NNMT gene rs694539 variant and migraine for the first time. Results Here we report the association of the Nicotinamide-N-methyltransferase gene (NNMT) rs694539 variant with migraine in a case–control study of 433 patients with migraine and 229 healthy controls (χ2 = 6.076, P = 0.048). After stratification, we were able only to show an association between the NNMT gene rs694539 variant and female patients with migraine on the genotype and allelic levels. However there was no association in male patients with migraine (χ2 = 1.054, P = 0.590). Conclusions Consequently our results clearly indicate that the NNMT gene rs694539 variant is a genetic risk factor for migraine.
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Affiliation(s)
- Ali Sazci
- Department of Medical Biology and Genetics, Faculty of Medicine, University of Kocaeli, Kocaeli, 41380, Turkey.
| | - Gensay Sazci
- Department of Medical Biology and Genetics, Faculty of Medicine, University of Kocaeli, Kocaeli, 41380, Turkey
| | - Bilgen Sazci
- Department of Medical Biology and Genetics, Faculty of Medicine, University of Kocaeli, Kocaeli, 41380, Turkey
| | - Emel Ergul
- Department of Medical Biology and Genetics, Faculty of Medicine, University of Kocaeli, Kocaeli, 41380, Turkey
| | - Halil Atilla Idrisoglu
- Department of Neurology, Istanbul Faculty of Medicine, University of Istanbul, Istanbul, Capa, 34290, Turkey
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Rahimi Z, Kakabaraee K, Garavand A, Rahimi Z. The T Allele of MTHFR c.C677T and Its Synergism with G (Val 158) Allele of COMT c.G472A Polymorphism Are Associated with the Risk of Bipolar I Disorder. Genet Test Mol Biomarkers 2016; 20:510-5. [PMID: 27447284 DOI: 10.1089/gtmb.2016.0061] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
AIMS The aims of the present study were to investigate the association between methylenetetrahydrofolate reductase (MTHFR) c.C677T (p.A222V) and catechol-O-methyltransferase (COMT) c.G472A (p.V158M) polymorphisms and their synergism with respect to bipolar I disorder (BID). METHODS Within an ethnic Kurdish population from Western Iran the MTHFR c.C677T and COMT c.G472A polymorphisms were studied in 150 patients with BID and 149 gender- and age-matched healthy individuals using the polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) method. RESULTS In the presence of MTHFR 677T allele and MTHFR TT genotype, the risk of BID was 1.44 times (p = 0.046) and 1.81-fold (p = 0.029), respectively. The frequency of COMT 472G allele compared to the A allele in cases and controls was not significant (p = 0.078); however there was a synergism between the presence of MTHFR 677T and COMT 472G alleles that increased the risk of BID by 2.58-fold (p = 0.003). CONCLUSIONS Our findings indicate that the presence of the lower activity allele of MTHFR (677T) increased the risk of BID. In addition, the concomitant presence of the MTHFR 677T allele with the COMT 472G allele was associated with increased susceptibility to BID in our population.
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Affiliation(s)
- Ziba Rahimi
- 1 Department of Psychology, Kermanshah Branch, Islamic Azad University , Kermanshah, Iran .,2 Medical Biology Research Center, Kermanshah University of Medical Sciences , Kermanshah, Iran
| | - Keivan Kakabaraee
- 1 Department of Psychology, Kermanshah Branch, Islamic Azad University , Kermanshah, Iran
| | - Amin Garavand
- 3 Department of Clinical Biochemistry, Kermanshah University of Medical Sciences , Kermanshah, Iran
| | - Zohreh Rahimi
- 2 Medical Biology Research Center, Kermanshah University of Medical Sciences , Kermanshah, Iran .,3 Department of Clinical Biochemistry, Kermanshah University of Medical Sciences , Kermanshah, Iran
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Ghanizadeh A, Singh AB, Berk M, Torabi-Nami M. Homocysteine as a potential biomarker in bipolar disorders: a critical review and suggestions for improved studies. Expert Opin Ther Targets 2015; 19:927-39. [PMID: 25882812 DOI: 10.1517/14728222.2015.1019866] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
INTRODUCTION Homocysteine levels have been associated with major depression, but associations with bipolar disorder remain less clear. Some data suggest homocysteine levels have potential as a biomarker of treatment response; however the literature is mixed. AREAS COVERED Oxidized forms of homocysteine can be potentially neurotoxic leading to glutamate toxicity, apoptotic transformation and neurodegenerative processes. High homocysteine may be a risk biomarker for bipolar disorders, but the empirical base remains too weak for firm conclusions. This review discusses the current literature for homocysteine levels as a biomarker. EXPERT OPINION It is premature to foreclose the utility of homocysteine levels as a biomarker for bipolar disorder due the methodological inadequacies in the existing literature. These methodological design issues include lack of control for the confounding variables of concurrent medication, phase of bipolar disorder, gender, age, nutritional status, thyroid, liver and renal function, smoking or lean body mass. Well-powered association studies with confounder control could help shed more light on the important clinical question of homocysteine's utility as a biomarker in bipolar disorder. Future experiments are needed to examine the outcome of interventions modulating homocysteine for treating bipolar disorder. Only prospective randomized control trials will provide definitive evidence of the utility of homocysteine as a biomarker or therapeutic target.
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Affiliation(s)
- Ahmad Ghanizadeh
- Shiraz University of Medical Sciences, School of Medicine, Research Center for Psychiatry and Behavioral Sciences, Department of Psychiatry , Shiraz , Iran +00987116273070 ;
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Mitchell ES, Conus N, Kaput J. B vitamin polymorphisms and behavior: evidence of associations with neurodevelopment, depression, schizophrenia, bipolar disorder and cognitive decline. Neurosci Biobehav Rev 2014; 47:307-20. [PMID: 25173634 DOI: 10.1016/j.neubiorev.2014.08.006] [Citation(s) in RCA: 91] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2013] [Revised: 07/11/2014] [Accepted: 08/18/2014] [Indexed: 11/16/2022]
Abstract
The B vitamins folic acid, vitamin B12 and B6 are essential for neuronal function, and severe deficiencies have been linked to increased risk of neurodevelopmental disorders, psychiatric disease and dementia. Polymorphisms of genes involved in B vitamin absorption, metabolism and function, such as methylene tetrahydrofolate reductase (MTHFR), cystathionine β synthase (CβS), transcobalamin 2 receptor (TCN2) and methionine synthase reductase (MTRR), have also been linked to increased incidence of psychiatric and cognitive disorders. However, the effects of these polymorphisms are often quite small and many studies failed to show any meaningful or consistent associations. This review discusses previous findings from clinical studies and highlights gaps in knowledge. Future studies assessing B vitamin-associated polymorphisms must take into account not just traditional demographics, but subjects' overall diet, relevant biomarkers of nutritional status and also analyze related genetic factors that may exacerbate behavioral effects or nutritional status.
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Affiliation(s)
- E Siobhan Mitchell
- Nestle Institute of Health Science, Innovation Park, EPFL Campus, Lausanne 1015, Switzerland.
| | - Nelly Conus
- Nestle Institute of Health Science, Innovation Park, EPFL Campus, Lausanne 1015, Switzerland
| | - Jim Kaput
- Nestle Institute of Health Science, Innovation Park, EPFL Campus, Lausanne 1015, Switzerland
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MTHFR gene polymorphism and age of onset of schizophrenia and bipolar disorder. BIOMED RESEARCH INTERNATIONAL 2014; 2014:318483. [PMID: 25101272 PMCID: PMC4101969 DOI: 10.1155/2014/318483] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/22/2014] [Revised: 05/20/2014] [Accepted: 06/15/2014] [Indexed: 11/28/2022]
Abstract
Objective. Several studies with contradictory results from different cultures about association of methylenetetrahydrofolate reductase (MTHFR) C677T polymorphism in schizophrenia and bipolar disorders. Little is known about this association in Arab culture and Egypt. So the present study aimed to assess the association of MTHFR C677T polymorphism in bipolar disorder (BD) and schizophrenia in comparison to control group. The association between MTHFR C677T polymorphism and the age at onset in schizophrenia or BD was also studied. Methods. Polymerase chain reaction and restriction fragment length polymorphism (PCR-RFLP) were used to examine the genotype and allele frequencies of MTHFR C677T polymorphism in 149 healthy subjects and 134 bipolar and 103 schizophrenia patients. Results. In BD and schizophrenia, there was a higher prevalence of MTHFR C677T polymorphism than healthy subjects. Earlier age at onset was found in patients with BD, carrying one copy of the T allele or CT genotypes but not in patients with schizophrenia. Conclusion. The present findings suggest that the MTHFR C677T polymorphisms are likely to be associated with the risk of developing BD and schizophrenia and influence the age at onset of BD but not the age at onset of schizophrenia.
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Methylenetetrahydrofolate reductase (MTHFR) polymorphism susceptibility to schizophrenia and bipolar disorder: an updated meta-analysis. J Neural Transm (Vienna) 2014; 122:307-20. [PMID: 24938371 DOI: 10.1007/s00702-014-1261-8] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2014] [Accepted: 06/10/2014] [Indexed: 01/30/2023]
Abstract
Previous studies examining the possible role of the methylenetetrahydrofolate reductase (MTHFR) polymorphisms in the development of schizophrenia (SZ) and bipolar disorder (BPD) have provided inconclusive findings, this meta-analysis was therefore designed to get a more reliable assessment. A total of 38 articles were identified through a search of electronic databases, up to 27 February 2014. Odds ratios (ORs) with 95% confidence interval (CIs) were calculated using random effects models. Meta-analysis showed that MTHFR C677T was significantly associated with SZ, the highest OR was found for the recessive model (for TT vs. CT + CC: OR = 1.34, 95% CI: 1.18-1.53); a marginal association of MTHFR C677T with increased risk of BPD has also been found for the recessive model (OR = 1.26, 95% CI: 1.00-1.59). Subgroup analysis by ethnicity indicated that the significant association with SZ and BPD existed among Asian and African populations, but not for the white. MTHFR A1298C was significant associated with SZ, the highest OR for the dominant model (OR = 1.13, 95% CI: 1.03-1.24). Subgroup analysis indicated a significant association with SZ existed in Asian populations, not among the white populations and no significant association was detected between the MTHFR A1298C and BPD in all groups. We conclude that MTHFR polymorphism is associated with SZ and BPD among Asian, African populations, but not the white.
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Stanger O, Fowler B, Piertzik K, Huemer M, Haschke-Becher E, Semmler A, Lorenzl S, Linnebank M. Homocysteine, folate and vitamin B12in neuropsychiatric diseases: review and treatment recommendations. Expert Rev Neurother 2014; 9:1393-412. [DOI: 10.1586/ern.09.75] [Citation(s) in RCA: 117] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Kim H, Lee KJ. Serum homocysteine levels are correlated with behavioral and psychological symptoms of Alzheimer's disease. Neuropsychiatr Dis Treat 2014; 10:1887-96. [PMID: 25336954 PMCID: PMC4200070 DOI: 10.2147/ndt.s68980] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
PURPOSE Homocysteine has been associated with cognitive impairment and various psychiatric symptoms. This study was designed to clarify whether a relationship exists between the serum levels of homocysteine and the behavioral and psychological symptoms of dementia. METHODS Patients with Alzheimer's disease (n=77) and control subjects (n=37) were included in this study. History taking, physical examination, and cognitive assessment were carried out as part of the investigation for the diagnosis of Alzheimer's disease based on the Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition. The Mini-Mental State Examination, Global Deterioration Scale, Clinical Dementia Rating, and the Korean version of the Neuropsychiatric Inventory were applied to all patients. The patients' serum homocysteine, folate, and vitamin B12 levels were measured. RESULTS Patients with Alzheimer's disease had statistically significantly lower Mini-Mental State Examination scores and higher serum homocysteine levels compared to the control subjects. Mean serum folate and vitamin B12 concentration were significantly lower in patients with Alzheimer's disease compared to control subjects. A statistically significant positive correlation was found between the serum homocysteine levels and the Neuropsychiatric Inventory subdomains, including delusion, agitation/aggression, depression/dysphoria, elation/euphoria, apathy/indifference, and disinhibition. No statistically significant correlation was found between the serum homocysteine concentration and the Mini-Mental State Examination, Global Deterioration Scale, or Clinical Dementia Rating. CONCLUSION Associations between the serum homocysteine levels and behavioral and psychological symptoms of dementia were observed, raising the possibility of an etiological role. However, the correlations between the folate or vitamin B12 levels and the Neuropsychiatric Inventory scores were not significant. The pathophysiological mechanisms underlying these findings remain to be elucidated. This was a cross-sectional study and the findings should be confirmed by repetitive, prospective longitudinal studies in a larger group of patients with neurodegenerative disorders.
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Affiliation(s)
- Hyun Kim
- Department of Psychiatry, Ilsan Paik Hospital, Inje University College of Medicine, Goyang, South Korea
| | - Kang Joon Lee
- Department of Psychiatry, Ilsan Paik Hospital, Inje University College of Medicine, Goyang, South Korea
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Sazci A, Ozel MD, Ergul E, Onder ME. Association of nicotinamide-N-methyltransferase (NNMT) gene rs694539 variant with bipolar disorder. Gene 2013; 532:272-5. [PMID: 24004542 DOI: 10.1016/j.gene.2013.08.077] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2013] [Revised: 08/21/2013] [Accepted: 08/25/2013] [Indexed: 11/22/2022]
Abstract
Here we report the association of the rs694539 variant of nicotinamide-N-methyltransferase gene with bipolar disorder in a case-control study of 95 bipolar disorder patients and 201 healthy controls (χ(2)=13.382, P=0.001). With the polymerase chain reaction restriction fragment length polymorphism method we developed we were able to show the association for the first time. This new finding may provide evidence to understand the mechanism of the disease.
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Affiliation(s)
- Ali Sazci
- Department of Medical Biology and Genetics, Faculty of Medicine, University of Kocaeli, 41380 Kocaeli, Turkey.
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19
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Alghasham A, Settin AA, Ali A, Dowaidar M, Ismail H. Association of MTHFR C677T and A1298C gene polymorphisms with hypertension. Int J Health Sci (Qassim) 2012; 6:3-11. [PMID: 23267299 DOI: 10.12816/0005968] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
OBJECTIVES To check for the association of genetic polymorphisms related to the methylenetetrahydrofolate reductase (MTHFR) gene namely C677T and A1298C with hypertension in Saudi affected subjects from Qassim region. SUBJECTS AND METHODS Participants included 123 Saudi hypertensive cases (83 males and 40 females) in addition to 250 (142 males and 108 females) unrelated healthy controls from the same locality. Their age mean ±SD was 50.93 ± 15.43 years. For all subjects, DNA was extracted followed by real-time PCR amplifications for characterization of genotypes and alleles related to MTHFR C677T and A1298C gene polymorphisms RESULTS Total cases showed significantly higher carriage rate for the mutant allele 677T compared to controls (40.7% vs. 26%, OR=1.9, 95% CI= 1.2-3.1) with a lower frequency of the wild type 677CC genotype (59.3% vs. 74%, p=0.004). The same was observed among cases-subgroups of hypertension associated with obesity with a notably higher odds ratio (OR=2.6, 95% CI=1.3-5.01, p=0.004). Total cases showed also significantly higher frequency of mutant 1298 C allele carriage rate compared to controls (59.3% vs. 42.4%, OR=1.98, 95% CI= 1.3-3.1) with a lower frequency of the normal AA genotype (40.7% vs. 57.6%, p=0.003). The same was observed among cases-subgroups of hypertension associated with both diabetes and obesity and among cases of hypertension with obesity, also with higher odds ratio (OR=2.6 and 2.2 respectively). CONCLUSION This work showed that genetic polymorphisms related to the MTHFR gene are associated with the risk of hypertension particularly when accompanied with obesity and diabetes among Saudi subjects.
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Affiliation(s)
- Abdullah Alghasham
- Molecular Biology Research Center, College of Medicine, Qassim University, Saudi Arabia ; Department of Pharmacology, College of Medicine, Qassim University, Saudi Arabia
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Chojnicka I, Sobczyk-Kopcioł A, Fudalej M, Fudalej S, Wojnar M, Waśkiewicz A, Broda G, Strawa K, Pawlak A, Krajewski P, Płoski R. No association between MTHFR C677T polymorphism and completed suicide. Gene 2012; 511:118-21. [DOI: 10.1016/j.gene.2012.09.019] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2011] [Revised: 04/21/2012] [Accepted: 09/05/2012] [Indexed: 10/27/2022]
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21
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Pollak A, Mueller-Malesinska M, Lechowicz U, Skorka A, Korniszewski L, Sobczyk-Kopciol A, Waskiewicz A, Broda G, Iwanicka-Pronicka K, Oldak M, Skarzynski H, Płoski R. MTHFR 677T is a strong determinant of the degree of hearing loss among Polish males with postlingual sensorineural hearing impairment. DNA Cell Biol 2012; 31:1267-73. [PMID: 22424391 DOI: 10.1089/dna.2012.1607] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Hearing impairment (HI) is the most common sensory handicap. Congenital HI often has a genetic basis, whereas the etiology of nonsyndromic postlingual HI (npHI) usually remains unidentified. Our purpose was to test whether the MTHFR C677T (rs1801133) polymorphism affecting folate metabolism is associated with the occurrence or severity of npHI. We studied rs1801133 genotypes in 647 npHI patients (age <40, sudden sensorineural loss excluded, HI characterized as mean of better ear hearing thresholds for 0.5-8 kHz) and 3273 adult controls from the background population. Genotype distribution among patients and controls was similar, but among male cases (n = 302) we found a dose-dependent correlation of MTHFR 677T with the degree of HI (mean thresholds in dB: 38.8, 44.9, and 53.3, for CC, CT, and TT genotypes, respectively; p = 0.0013, p(cor.) = 0.017). Among male patients rs1801133 TT significantly increased the risk of severe/profound HI (odds ratio = 4.88, p = 0.001). Among controls the known effect of MTHFR 677T on plasma total homocysteine was more pronounced in men than in women (p<0.00004 for genotype-sex interaction) suggesting that in Poland folate deficiency is more prevalent in males. In conclusion, we report a novel strong effect of MTHFR 677T among males with npHI. The functional significance of rs1801133 suggests that these patients may benefit from folate supplementation-an intervention which is simple, cheap, and devoid of side effects.
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Affiliation(s)
- Agnieszka Pollak
- Institute of Physiology and Pathology of Hearing, Warsaw, Poland
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Ezzaher A, Mouhamed DH, Mechri A, Omezzine A, Neffati F, Douki W, Bouslama A, Gaha L, Najjar MF. Hyperhomocysteinemia in Tunisian bipolar I patients. Psychiatry Clin Neurosci 2011; 65:664-71. [PMID: 22176285 DOI: 10.1111/j.1440-1819.2011.02284.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
AIMS The aim of the present study was to investigate hyperhomocysteinemia in Tunisian bipolar I patients according to 5,10-methylenetetrahydrofolate reductase (MTHFR) C677T polymorphism. METHODS The subjects consisted of 92 patients with bipolar I disorder diagnosed according to DSM-IV, and 170 controls. Plasma total homocysteine, folate and vitamin B12 were measured. MTHFR C677T polymorphism was determined by polymerase chain reaction-restriction fragment length polymorphism. RESULTS Compared with controls, patients had a significantly higher homocysteine level (16.4 ± 9.8 vs 9.6 ± 4.5 µmol/L; P < 0.001) and a significantly lower folate level (3.2 ± 0.9 vs 6.5 ± 3.2 µg/L; P < 0.001). C677T MTHFR polymorphism genotype frequencies were in Hardy-Weinberg equilibrium. After adjustment for MTHFR C677T genotypes, hypofolatemia, hypovitamin B12 and for potential confounding factors, the odds ratio (OR) of hyperhomocysteinemia associated with bipolar disorder remained significant (OR, 5.53; 95% confidence interval: 1.92-15.86; P = 0.001). In patients, there was no significant change in hyperhomocysteinemia, hypofolatemia and hypovitamin B12 with regard to the clinical and therapeutic characteristics, whereas the highest prevalence of hyperhomocysteinemia was found in depressive patients and when illness duration was >12 years. Hypofolatemia was seen in all patients on lithium and in the majority of patients on carbamazepine, and the highest prevalence of hypovitamin B12 was noted in patients taking carbamazepine. CONCLUSION Hyperhomocysteinemia was more frequent in bipolar I patients independent of C677T polymorphism. Patients had reduced levels of folate, which modulates homocysteine metabolism. Indeed, this finding indicates that folate supplementation may be appropriate for bipolar patients with hyperhomocysteinemia.
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Affiliation(s)
- Asma Ezzaher
- Laboratory of Biochemistry-Toxicology, Monastir University Hospital, Monastir, Tunisia.
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Sensoy N, Şoysal Y, Kahraman A, Doğan N, Imirzalioğlu N. Modulator effects of the methylenetetrahydrofolate reductase C677T polymorphism on response to vitamin B12 therapy and homocysteine metabolism. DNA Cell Biol 2011; 31:820-5. [PMID: 22084937 DOI: 10.1089/dna.2011.1422] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
In this study, our aim was to investigate the association of methylenetetrahydrofolate reductase (MTHFR) C677T polymorphism on the vitamin B12 therapy response in 95 patients with vitamin B12 deficiency and 92 healthy control subjects using vitamin B12, plasma total homocysteine (tHcy), and folate as the main measure of outcome. MTHFR C677T genotypes were determined by polymerase chain reaction-restriction fragment length polymorphism techniques. There were no differences in the distribution of MTHFR genotypes in the cases versus the controls. Mean concentrations of plasma tHcy and B12 vitamin were 18.84 μM and 142.47 pg/mL in patients with TT (10.5%) genotypes. Furthermore, mean concentrations of B12 vitamin after cobalamin therapy were 697.62, 656.64, and 488.76 pg/mL in patients with the CC, CT, and TT genotypes, respectively. The MTHFR 677 TT genotype has decreasing effect in B12 vitamin and increasing effect in tHcy. In comparison with the patients having CC and CT genotypes, patients with the TT genotype had a lower response to vitamin B12 therapy.
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Affiliation(s)
- Nazli Sensoy
- Department of Family Medicine, Afyon Kocatepe University, Afyonkarahisar, Turkey.
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Peerbooms OLJ, van Os J, Drukker M, Kenis G, Hoogveld L, de Hert M, Delespaul P, van Winkel R, Rutten BPF. Meta-analysis of MTHFR gene variants in schizophrenia, bipolar disorder and unipolar depressive disorder: evidence for a common genetic vulnerability? Brain Behav Immun 2011; 25:1530-43. [PMID: 21185933 DOI: 10.1016/j.bbi.2010.12.006] [Citation(s) in RCA: 108] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/01/2010] [Revised: 11/23/2010] [Accepted: 12/10/2010] [Indexed: 01/17/2023] Open
Abstract
Past analyses examining the relationship between genetic variation in the 5, 10-methylenetetrahydrofolate reductase (MTHFR) gene and psychiatric disorders have provided mixed and largely inconclusive findings. MTHFR is involved in the one-carbon metabolic pathway which is essential for DNA biosynthesis and the epigenetic process of DNA methylation. We conducted a meta-analysis of all published case-control studies investigating associations between two common MTHFR single nucleotide polymorphisms (SNPs), MTHFR C677T (sample size 29,502) and A1298C (sample size 7934), and the major psychiatric disorders (i) schizophrenia (SZ), (ii) bipolar disorder (BPD), and (iii) unipolar depressive disorder (UDD). In order to examine possible shared genetic vulnerability, we also tested for associations between MTHFR and all of these major psychiatric disorders (SZ, BPD and UDD) combined. MTHFR C677T was significantly associated with all of the combined psychiatric disorders (SZ, BPD and UDD); random effects odds ratio (OR)=1.26 for TT versus CC genotype carriers; confidence interval (CI) 1.09-1.46); meta-regression did not suggest moderating effects of psychiatric diagnosis, sex, ethnic group or year of publication. Although MTHFR A1298C was not significantly associated with the combination of major psychiatric disorders, nor with SZ, there was evidence for diagnostic moderation indicating a significant association with BPD (random effects OR=2.03 for AA versus CC genotype carriers, CI: 1.07-3.86). Meta-analysis on UDD was not possible due to the small number of studies available. This study provides evidence for shared genetic vulnerability for SZ, BPD and UDD mediated by MTHFR 677TT genotype, which is in line with epigenetic involvement in the pathophysiology of these psychiatric disorders.
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Affiliation(s)
- Odette L J Peerbooms
- Department of Psychiatry and Neuropsychology, School for Mental Health and Neuroscience, European Graduate School of Neuroscience, South Limburg Mental Health Research and Teaching Network, Maastricht University, Maastricht, The Netherlands
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Metabolic syndrome and serum homocysteine in patients with bipolar disorder and schizophrenia treated with second generation antipsychotics. Psychiatry Res 2011; 189:21-5. [PMID: 21216014 DOI: 10.1016/j.psychres.2010.11.021] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/02/2009] [Revised: 11/16/2010] [Accepted: 11/17/2010] [Indexed: 11/20/2022]
Abstract
There is accumulating evidence for an increased prevalence of metabolic syndrome (MetS) in bipolar patients, which is comparable to the prevalence of MetS in patients with schizophrenia. Hyperhomocysteinaemia has emerged as an independent and graded risk factor for the development of cardiovascular disease (CVD), which is, at the same time, the primary clinical outcome of MetS. The aim of this study was to ascertain if the presence of MetS was associated with hyperhomocysteinaemia in patients with bipolar disorder (N=36) and schizophrenia (N=46) treated with second-generation antipsychotics (SGA). MetS was defined according to the National Cholesterol Education Program Adult Treatment Panel III (NCEP ATP-III) criteria and the cut-off point for hyperhomocysteinaemia was set up at 15 μmoll(-1). Results of the study indicated that the presence of the MetS is statistically significantly associated with the elevated serum homocysteine in all participants. As hyperhomocysteinaemia has emerged as an independent risk factor for psychiatric disorder and CVD, it could be useful to include fasting homocysteine serum determination in the diagnostic panels of psychiatric patients to obtain a better assessment of their metabolic risk profile.
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Cohen-Woods S, Craig I, Gaysina D, Gray J, Gunasinghe C, Craddock N, Elkin A, Jones L, Kennedy J, King N, Korszun A, Knight J, Owen M, Parikh S, Strauss J, Sterne A, Tozzi F, Perry J, Muglia P, Vincent J, McGuffin P, Farmer A. The Bipolar Association Case-Control Study (BACCS) and meta-analysis: No association with the 5,10-Methylenetetrahydrofolate reductase gene and bipolar disorder. Am J Med Genet B Neuropsychiatr Genet 2010; 153B:1298-304. [PMID: 20552676 DOI: 10.1002/ajmg.b.31101] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Bipolar disorder (BD) is a complex genetic disease for which the underlying pathophysiology has yet to be fully explained. 5,10-Methylenetetrahydrofolate reductase (MTHFR) is a crucial enzyme in folate-mediated one-carbon metabolism and folate deficiency can be associated with psychiatric symptoms. A single base variant in MTHFR gene (C677T) results in the production of a mildly dysfunctional thermolabile enzyme and has recently been implicated in BD. We conducted an association study of this polymorphism in 897 patients with bipolar I or bipolar II disorder, and 1,687 healthy control subjects. We found no evidence for genotypic or allelic association in this sample. We also performed a meta-analysis of our own, and all published data, and report no evidence for association. Our findings suggest that the MTHFR C677T polymorphism is not involved in the genetic etiology of clinically significant BD.
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Affiliation(s)
- Sarah Cohen-Woods
- Institute of Psychiatry, King's College London, MRC SGDP Centre, London, UK.
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Brocardo PS, Budni J, Pavesi E, Franco JL, Uliano-Silva M, Trevisan R, Terenzi MG, Dafre AL, Rodrigues ALS. Folic acid administration prevents ouabain-induced hyperlocomotion and alterations in oxidative stress markers in the rat brain. Bipolar Disord 2010; 12:414-24. [PMID: 20636639 DOI: 10.1111/j.1399-5618.2010.00827.x] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
OBJECTIVE Bipolar disorder (BD) is a chronic, prevalent, and highly debilitating psychiatric illness. Folic acid has been shown to have antidepressant-like effects in preclinical and clinical studies and has also been suggested to play a role in BD. The present work investigates the therapeutic value of folic acid supplementation in a preclinical animal model of mania induced by ouabain. METHODS Male Wistar rats were treated twice daily for seven days with folic acid (10, 50, and 100 mg/kg, p.o.) or the mood stabilizer lithium chloride (LiCl) (45 mg/kg, p.o.). One day after the last dose was given, the animals received an i.c.v. injection of ouabain (10 microM), a Na(+),K(+)-ATPase-inhibiting compound. Locomotor activity was assessed in the open-field test. Thiobarbituric acid-reactive substance (TBARS) levels, glutathione peroxidase (GPx), and glutathione reductase (GR) activities were measured in the cerebral cortex and hippocampus. RESULTS Ouabain (10 microM, i.c.v.) significantly increased motor activity in the open-field test, and seven days of pretreatment with folic acid (50 mg/kg, p.o.) or LiCl (45 mg/kg, p.o.) completely prevented this effect. Ouabain treatment elicited lipid peroxidation (increased TBARS levels) and reduced GPx activity in the hippocampus. GR activity was decreased in the cerebral cortex and hippocampus. These effects were prevented by pretreatment with folic acid and LiCl. CONCLUSIONS Our results show that folic acid, similarly to LiCl, produces a clear antimanic action and prevents the neurochemical alterations indicative of oxidative stress in an animal model of mania.
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Affiliation(s)
- Patrícia S Brocardo
- Department of Biochemistry, Centre of Biological Sciences, Federal University of Santa Catarina, Campus Universitario, Trindade, Florianopolis, Santa Catarina, Brazil
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Van Wyk J, Britz TJ. A rapid HPLC method for the extraction and quantification of vitamin B12in dairy products and cultures ofPropionibacterium freudenreichii. ACTA ACUST UNITED AC 2010. [DOI: 10.1051/dst/2009055] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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