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Yang J, Wang T, Fang G, Qi L, Chen X, Zhou H. Chirality identification of Ibuprofen enantiomers by a terahertz polarization-sensitive metasurface sensor. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 322:124803. [PMID: 39003828 DOI: 10.1016/j.saa.2024.124803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 06/24/2024] [Accepted: 07/09/2024] [Indexed: 07/16/2024]
Abstract
Chirality plays an important role in medicine, biology, and chemistry. Molecules of different chirality could display dramatically different medical effects, pharmacological activities, and physiological impacts. Ibuprofen is an important anti-inflammatory drug in clinics. The anti-inflammatory effect is almost solely attributed to the (S)-(+)-Ibuprofen, while its enantiomer (R)-(-)-Ibuprofen plays a negative effect on increasing the metabolic burden. In this work, a terahertz (THz) polarization-sensitive metasurface sensor is proposed for qualitative and quantitative identification of the chiral Ibuprofen. The chirality parameters of Ibuprofen are extracted from the circular-polarized transmission coefficients. The parameters are further used to simulate the coupling mechanism between the Ibuprofen and the sensor to explain the principle of recognition. The sensitivities of (R)-(-)-Ibuprofen and (S)-(+)-Ibuprofen are found to be 1.5 THz/(mg/L) and 1.8 THz/(mg/L) for the TM polarization, respectively, and 1.7 THz/(mg/L) and 2.1 THz/(mg/L) for the TE polarization, respectively. The difference enables the chirality identification according to the different frequency shift at the same concentration. The exceptional specificity and sensitivity provide a new avenue for chiral molecular recognition.
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Affiliation(s)
- Jun Yang
- GBA branch of Aerospace Information Research Institute, Chinese Academy of Sciences, Guangzhou 510700, China; School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China; Guangdong Provincial Key Laboratory of Terahertz Quantum Electromagnetics, Guangzhou 510700, China
| | - Tianwu Wang
- GBA branch of Aerospace Information Research Institute, Chinese Academy of Sciences, Guangzhou 510700, China; Guangdong Provincial Key Laboratory of Terahertz Quantum Electromagnetics, Guangzhou 510700, China; University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Guangyou Fang
- GBA branch of Aerospace Information Research Institute, Chinese Academy of Sciences, Guangzhou 510700, China; Guangdong Provincial Key Laboratory of Terahertz Quantum Electromagnetics, Guangzhou 510700, China; University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Limei Qi
- School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China.
| | - Xuequan Chen
- GBA branch of Aerospace Information Research Institute, Chinese Academy of Sciences, Guangzhou 510700, China; Guangdong Provincial Key Laboratory of Terahertz Quantum Electromagnetics, Guangzhou 510700, China
| | - Huaping Zhou
- Guangzhou Institute of Cancer Research, the Affiliated Cancer Hospital, Guangzhou Medical University, Guangzhou 510095, China.
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Kitabayashi M, Umetsu S, Suzuki M, Konta T. Relationship between food group-specific intake and depression among local government employees in Japan. BMC Nutr 2024; 10:21. [PMID: 38291535 PMCID: PMC10826071 DOI: 10.1186/s40795-024-00830-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Accepted: 01/22/2024] [Indexed: 02/01/2024] Open
Abstract
BACKGROUND We aimed to examine the relationship between food group-specific intake and depression among workers in Japan. METHODS A questionnaire survey was administered to 568 workers in 2020; 503 workers responded and 423 were included in the study. Information on sex, age, body mass index, overtime hours, sleep duration, marital status, employment position, exercise habits, smoking status, incidence of depression, and intake of energy, proteins, lipids, carbohydrates, alcohol, and specific food groups were collected. The Center for Epidemiologic Studies Depression Scale was used to assess the presence and severity of depression. Food group-specific intake was adjusted for energy intake using the residual method and classified into low, moderate, and high by sex. Logistic regression was used to examine the odds ratios (ORs) and trends according to sex, with the presence/absence of depression as the dependent variable and food group-specific intake as the independent variable. RESULTS Men in the eggs low-intake, and women in the other vegetables low- and moderate-intake and eggs moderate-intake groups had significantly higher adjusted ORs (aORs) for depression. Additionally, a dose-response relationship was observed, where the OR for depression was significantly higher in men when the intake of eggs was low (p for trend = 0.024) and in women when the intakes of other vegetables (p for trend = 0.011) and eggs (p for trend = 0.032) were low. CONCLUSIONS The intake of eggs in men and eggs and vegetables in women may be related to depression.
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Affiliation(s)
- Makiko Kitabayashi
- Department of Health and Nutrition, Yamagata Prefectural Yonezawa University of Nutrition Sciences, Yonezawa, Yamagata, Japan.
- Department of Public Health and Hygiene, Yamagata University Graduate School of Medical Sciences, Yamagata, Yamagata, Japan.
| | - Shoko Umetsu
- Department of Health and Nutrition, Yamagata Prefectural Yonezawa University of Nutrition Sciences, Yonezawa, Yamagata, Japan
| | - Miho Suzuki
- Department of Health and Nutrition, Yamagata Prefectural Yonezawa University of Nutrition Sciences, Yonezawa, Yamagata, Japan
- Department of Public Health and Hygiene, Yamagata University Graduate School of Medical Sciences, Yamagata, Yamagata, Japan
| | - Tsuneo Konta
- Department of Public Health and Hygiene, Yamagata University Graduate School of Medical Sciences, Yamagata, Yamagata, Japan
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3
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Comai S, Nunez N, Atkin T, Ghabrash MF, Zakarian R, Fielding A, Saint-Laurent M, Low N, Sauber G, Ragazzi E, Hillard CJ, Gobbi G. Dysfunction in endocannabinoids, palmitoylethanolamide, and degradation of tryptophan into kynurenine in individuals with depressive symptoms. BMC Med 2024; 22:33. [PMID: 38273283 PMCID: PMC10809514 DOI: 10.1186/s12916-024-03248-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/30/2023] [Accepted: 01/03/2024] [Indexed: 01/27/2024] Open
Abstract
BACKGROUND The endocannabinoid (eCB) system and the serotonin (5-HT) are both implicated in the severity of the depression. 5-HT is synthesized from the amino acid tryptophan (Trp), which is also a precursor for kynurenine (Kyn) whose production is increased at the expense of 5-HT in depressed patients. No clinical studies have investigated the crosstalk between the eCB system and the Trp/5-HT/Kyn pathways. Here, we hypothesized that the eCB system is associated with an enhanced Kyn production in relation to the severity of depressive symptoms. METHODS Eighty-two subjects (51 patients with a diagnosis of depressive disorder (DSM-5) and 31 healthy volunteers), were assessed with the Montgomery-Åsberg Depression Rating Scale (MADRS), Beck Depression Scale, and Global Clinical Impression. Serum concentrations of eCBs (N-arachidonoylethanolamine (AEA) and 2-arachidonoylglycerol (2-AG)); structurally related fatty acyl compounds 2-oleoylglycerol (2-OG), oleoylethanolamide (OEA), and palmitoylethanolamide (PEA); Trp, Kyn, Kyn/Trp ratio (an index of Trp degradation into Kyn) and 5-HT were also determined. RESULTS Following a principal component analysis including the severity of depression, Kyn and the Kyn/Trp ratio appear to be directly associated with 2-AG, AEA, and PEA. Interestingly, these biomarkers also permitted to distinguish the population into two main clusters: one of individuals having mild/severe depressive symptoms and the other with an absence of depressive symptoms. Using parametric analysis, higher serum levels of 2-AG, Kyn, and the ratio Kyn/Trp and lower levels of Trp and 5-HT were found in individuals with mild/severe depressive symptoms than in those without depressive symptoms. While in asymptomatic people, PEA was directly associated to Trp, and OEA indirectly linked to 5-HT, in individuals with depressive symptoms, these correlations were lost, and instead, positive correlations between AEA and 2-AG, PEA and AEA, and PEA vs 2-AG and OEA concentrations were found. CONCLUSIONS Parametric and non-parametric analyses suggest a possible association between eCBs, tryptophan/kynurenine biomarkers, and severity of depression, confirming a likely interplay among inflammation, stress, and depression. The enhanced relationships among the biomarkers of the 2-AG and AEA pathways and related lipids seen in individuals with depressive symptoms, but not in asymptomatics, suggest an altered metabolism of the eCB system in depression.
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Affiliation(s)
- Stefano Comai
- Department of Pharmaceutical and Pharmacological Sciences, University of Padua, Padua, Italy.
- Department of Biomedical Sciences, University of Padua, Padua, Italy.
- Department of Psychiatry, McGill University, Montreal, QC, Canada.
- IRCCS San Raffaele Scientific Institute, Milan, Italy.
| | - Nicolas Nunez
- Department of Psychiatry, McGill University, Montreal, QC, Canada
| | - Tobias Atkin
- Department of Psychiatry, McGill University, Montreal, QC, Canada
| | | | - Rita Zakarian
- Department of Psychiatry, McGill University, Montreal, QC, Canada
| | - Allan Fielding
- Department of Psychiatry, McGill University Health Center, Montreal, QC, Canada
| | - Marie Saint-Laurent
- Department of Psychiatry, McGill University Health Center, Montreal, QC, Canada
| | - Nancy Low
- Department of Psychiatry, McGill University, Montreal, QC, Canada
- Department of Psychiatry, McGill University Health Center, Montreal, QC, Canada
| | - Garrett Sauber
- Neuroscience Research Center and Department of Pharmacology and Toxicology, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Eugenio Ragazzi
- Department of Pharmaceutical and Pharmacological Sciences, University of Padua, Padua, Italy
| | - Cecilia J Hillard
- Neuroscience Research Center and Department of Pharmacology and Toxicology, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Gabriella Gobbi
- Department of Psychiatry, McGill University, Montreal, QC, Canada.
- Department of Psychiatry, McGill University Health Center, Montreal, QC, Canada.
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4
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Balter LJ, Li X, Schwieler L, Erhardt S, Axelsson J, Olsson MJ, Lasselin J, Lekander M. Lipopolysaccharide-induced changes in the kynurenine pathway and symptoms of sickness behavior in humans. Psychoneuroendocrinology 2023; 153:106110. [PMID: 37075653 DOI: 10.1016/j.psyneuen.2023.106110] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 03/07/2023] [Accepted: 04/06/2023] [Indexed: 04/21/2023]
Abstract
Metabolites of the kynurenine pathway are hypothesized to be implicated in inflammation-associated depression, but there is a lack of experimental studies in humans assessing the kinetics of kynurenine metabolites in relation to experimentally-induced sickness. The aim of the present study was to assess changes in the kynurenine pathway and to explore its relation to symptoms of sickness behavior during an acute experimental immune challenge. This double-blind placebo-controlled randomized cross-over study included 22 healthy human participants (n = 21 both sessions, Mage = 23.4, SD = 3.6, nine women) who received an intravenous injection of 2.0 ng/kg lipopolysaccharide (LPS) and saline (placebo) on two different occasions in a randomized order. Blood samples (0 h, 1 h, 1.5 h, 2 h, 3 h, 4 h, 5 h, 7 h post-injection) were analyzed for kynurenine metabolites and inflammatory cytokines. The intensity of symptoms of sickness behavior was assessed using the 10-item Sickness Questionnaire at 0 h, 1.5 h, 3 h, 5 h, and 7 h post-injection. LPS induced significantly lower concentrations of plasma tryptophan (at 2 h, 4 h, 5 h, and 7 h post-injection), kynurenine (at 2 h, 3 h, 4 h, and 5 h post-injection), nicotinamide (at 4 h, 5 h, and 7 h post-injection), and higher levels for quinolinic acid at 5 h post-injection as compared to placebo. LPS did not affect kynurenic acid, 3-hydroxykynurenine, and picolinic acid. The development of the sickness symptoms was largely similar across items, with the highest levels around 1.5-3 h post-injection. Changes in plasma levels of kynurenine metabolites seem to coincide rather than precede or follow changes in subjective sickness. Exploratory analyses indicate that higher Sickness Questionnaire total scores at 1.5-5 h post-injection were correlated with lower kynurenic acid and nicotinamide levels. These results lend further support for LPS-induced changes in the kynurenine pathway, but may not, as interpreted from blood levels, causally link to LPS-induced acute symptoms of sickness behavior. Future research may consider a larger sample to further scrutinize the role of the kynurenine pathway in the sickness response.
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Affiliation(s)
- Leonie Jt Balter
- Department of Clinical Neuroscience, Division of Psychology, Karolinska Institutet, Stockholm, Sweden; Stress Research Institute, Department of Psychology, Stockholm University, Stockholm, Sweden.
| | - Xueqi Li
- Department of Physiology, Karolinska Institutet, Stockholm, Sweden
| | - Lilly Schwieler
- Department of Physiology, Karolinska Institutet, Stockholm, Sweden
| | - Sophie Erhardt
- Department of Physiology, Karolinska Institutet, Stockholm, Sweden
| | - John Axelsson
- Department of Clinical Neuroscience, Division of Psychology, Karolinska Institutet, Stockholm, Sweden; Stress Research Institute, Department of Psychology, Stockholm University, Stockholm, Sweden
| | - Mats J Olsson
- Department of Clinical Neuroscience, Division of Psychology, Karolinska Institutet, Stockholm, Sweden
| | - Julie Lasselin
- Department of Clinical Neuroscience, Division of Psychology, Karolinska Institutet, Stockholm, Sweden; Stress Research Institute, Department of Psychology, Stockholm University, Stockholm, Sweden; Osher Center for Integrative Health, Department of Clinical Neuroscience, Karolinska Institutet, Sweden
| | - Mats Lekander
- Department of Clinical Neuroscience, Division of Psychology, Karolinska Institutet, Stockholm, Sweden; Stress Research Institute, Department of Psychology, Stockholm University, Stockholm, Sweden; Osher Center for Integrative Health, Department of Clinical Neuroscience, Karolinska Institutet, Sweden
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5
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Bruncsics B, Hullam G, Bolgar B, Petschner P, Millinghoffer A, Gecse K, Eszlari N, Gonda X, Jones DJ, Burden ST, Antal P, Deakin B, Bagdy G, Juhasz G. Genetic risk of depression is different in subgroups of dietary ratio of tryptophan to large neutral amino acids. Sci Rep 2023; 13:4976. [PMID: 36973313 PMCID: PMC10042855 DOI: 10.1038/s41598-023-31495-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2022] [Accepted: 03/13/2023] [Indexed: 03/29/2023] Open
Abstract
Manipulation of intake of serotonin precursor tryptophan has been exploited to rapidly induce and alleviate depression symptoms. While studies show that this latter effect is dependent on genetic vulnerability to depression, the effect of habitual tryptophan intake in the context of predisposing genetic factors has not been explored. Our aim was to investigate the effect of habitual tryptophan intake on mood symptoms and to determine the effect of risk variants on depression in those with high and low tryptophan intake in the whole genome and specifically in serotonin and kynurenine pathways. 63,277 individuals in the UK Biobank with data on depressive symptoms and tryptophan intake were included. We compared two subpopulations defined by their habitual diet of a low versus a high ratio of tryptophan to other large amino acids (TLR). A modest protective effect of high dietary TLR against depression was found. NPBWR1 among serotonin genes and POLI in kynurenine pathway genes were significantly associated with depression in the low but not in the high TLR group. Pathway-level analyses identified significant associations for both serotonin and kynurenine pathways only in the low TLR group. In addition, significant association was found in the low TLR group between depressive symptoms and biological process related to adult neurogenesis. Our findings demonstrate a markedly distinct genetic risk profile for depression in groups with low and high dietary TLR, with association with serotonin and kynurenine pathway variants only in case of habitual food intake leading to low TLR. Our results confirm the relevance of the serotonin hypothesis in understanding the neurobiological background of depression and highlight the importance of understanding its differential role in the context of environmental variables such as complexity of diet in influencing mental health, pointing towards emerging possibilities of personalised prevention and intervention in mood disorders in those who are genetically vulnerable.
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Grants
- BME NC TKP2020, BME IE-BIO TKP2020, Artificial Intelligence National Laboratory Programme NRDI Fund based on the charter of bolster issued by the NRDI Office under the auspices of the Ministry for Innovation and Technology
- TKP2021-EGA-02 National Research, Development, and Innovation Fund of Hungary
- OTKA 139330 National Research, Development and Innovation Office, Hungary
- ÚNKP-21-5-BME-362 New National Excellence Program of the Ministry for Innovation and Technology from the source of the National Research, Development and Innovation Fund
- ÚNKP-21-4-II-BME-143 New National Excellence Program of the Ministry for Innovation and Technology from the source of the National Research, Development and Innovation Fund
- ÚNKP-22-3-II-SE-27 New National Excellence Program of the Ministry for Innovation and Technology from the source of the National Research, Development and Innovation Fund
- ÚNKP-22-4-II-SE-1 New National Excellence Program of the Ministry for Innovation and Technology from the source of the National Research, Development and Innovation Fund
- ERAPERMED2019-108 National Research, Development and Innovation Office, Hungary , under the frame of ERA PerMed (2019-2.1.7-ERA-NET-2020-00005)
- ERAPERMED2019-108 National Research, Development and Innovation Office, Hungary , under the frame of ERA PerMed (2019-2.1.7-ERA-NET-2020-00005)
- ERAPERMED2019-108 National Research, Development and Innovation Office, Hungary , under the frame of ERA PerMed (2019-2.1.7-ERA-NET-2020-00005)
- ERAPERMED2019-108 National Research, Development and Innovation Office, Hungary , under the frame of ERA PerMed (2019-2.1.7-ERA-NET-2020-00005)
- 2017-1.2.1-NKP-2017-00002 Hungarian Brain Research Program
- NAP2022-I-4/2022 Hungarian Brain Research Program
- 2017-1.2.1-NKP-2017-00002 Hungarian Brain Research Program
- 2017-1.2.1-NKP-2017-00002 Hungarian Brain Research Program
- 2017-1.2.1-NKP-2017-00002 Hungarian Brain Research Program
- 2017-1.2.1-NKP-2017-00002 Hungarian Brain Research Program
- P20809 Japan Society for the Promotion of Science (Postdoctoral Fellowships for Research in Japan, standard program)
- TKP2021-EGA-25 Thematic Excellence Programme, Ministry of Innovation and Technology in Hungary, from the National Research, Development and Innovation Fund
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Affiliation(s)
- Bence Bruncsics
- Department of Measurement and Information Systems, Budapest University of Technology and Economics, Muegyetem Rkp. 3., 1111, Budapest, Hungary
| | - Gabor Hullam
- Department of Measurement and Information Systems, Budapest University of Technology and Economics, Muegyetem Rkp. 3., 1111, Budapest, Hungary
- Department of Pharmacodynamics, Faculty of Pharmacy, Semmelweis University, Nagyvarad ter 4., 1089, Budapest, Hungary
| | - Bence Bolgar
- Department of Measurement and Information Systems, Budapest University of Technology and Economics, Muegyetem Rkp. 3., 1111, Budapest, Hungary
| | - Peter Petschner
- Department of Pharmacodynamics, Faculty of Pharmacy, Semmelweis University, Nagyvarad ter 4., 1089, Budapest, Hungary
- NAP3.0-SE Neuropsychopharmacology Research Group, Hungarian Brain Research Program, Semmelweis University, Budapest, Hungary
- Bioinformatics Center, Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto, Japan
| | - Andras Millinghoffer
- Department of Measurement and Information Systems, Budapest University of Technology and Economics, Muegyetem Rkp. 3., 1111, Budapest, Hungary
- NAP3.0-SE Neuropsychopharmacology Research Group, Hungarian Brain Research Program, Semmelweis University, Budapest, Hungary
| | - Kinga Gecse
- Department of Pharmacodynamics, Faculty of Pharmacy, Semmelweis University, Nagyvarad ter 4., 1089, Budapest, Hungary
- SE-NAP2 Genetic Brain Imaging Migraine Research Group, Hungarian Brain Research Program, Semmelweis University, Budapest, Hungary
| | - Nora Eszlari
- Department of Pharmacodynamics, Faculty of Pharmacy, Semmelweis University, Nagyvarad ter 4., 1089, Budapest, Hungary
- NAP3.0-SE Neuropsychopharmacology Research Group, Hungarian Brain Research Program, Semmelweis University, Budapest, Hungary
| | - Xenia Gonda
- NAP3.0-SE Neuropsychopharmacology Research Group, Hungarian Brain Research Program, Semmelweis University, Budapest, Hungary
- Department of Psychiatry and Psychotherapy, Faculty of Medicine, Semmelweis University, Budapest, Hungary
| | - Debra J Jones
- School of Health Sciences, University of Manchester, Manchester, UK
| | - Sorrel T Burden
- School of Health Sciences, University of Manchester, Manchester, UK
| | - Peter Antal
- Department of Measurement and Information Systems, Budapest University of Technology and Economics, Muegyetem Rkp. 3., 1111, Budapest, Hungary
| | - Bill Deakin
- Division of Neuroscience and Experimental Psychology, School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester Academic Health Science Centre, Manchester, UK
| | - Gyorgy Bagdy
- Department of Pharmacodynamics, Faculty of Pharmacy, Semmelweis University, Nagyvarad ter 4., 1089, Budapest, Hungary
- NAP3.0-SE Neuropsychopharmacology Research Group, Hungarian Brain Research Program, Semmelweis University, Budapest, Hungary
| | - Gabriella Juhasz
- Department of Pharmacodynamics, Faculty of Pharmacy, Semmelweis University, Nagyvarad ter 4., 1089, Budapest, Hungary.
- NAP3.0-SE Neuropsychopharmacology Research Group, Hungarian Brain Research Program, Semmelweis University, Budapest, Hungary.
- SE-NAP2 Genetic Brain Imaging Migraine Research Group, Hungarian Brain Research Program, Semmelweis University, Budapest, Hungary.
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Alberts C, Owe-Larsson M, Urbanska EM. New Perspective on Anorexia Nervosa: Tryptophan-Kynurenine Pathway Hypothesis. Nutrients 2023; 15:nu15041030. [PMID: 36839388 PMCID: PMC9967350 DOI: 10.3390/nu15041030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 02/14/2023] [Accepted: 02/16/2023] [Indexed: 02/22/2023] Open
Abstract
Anorexia nervosa (AN), affecting up to 4% of all females and 0.3% of all males globally, remains the neuropsychiatric disorder with the highest mortality rate. However, the response to the current therapeutic options is rarely satisfactory. Considering the devastating prognosis of survival among patients with AN, further research aimed at developing novel, more effective therapies for AN is essential. Brain and serum tryptophan is mostly converted along the kynurenine pathway into multiple neuroactive derivatives, whereas only 1-2% is used for the synthesis of serotonin. This narrative review provides an update on the experimental and clinical research data concerning the metabolism of tryptophan along the kynurenine pathway in anorexia nervosa based on the available literature. We propose that in AN, lower levels of L-kynurenine and kynurenic acid result in diminished stimulation of the aryl hydrocarbon receptor, which could contribute to abnormally low body weight. The impact of L-kynurenine supplementation on anorexia in animal models and the effects of changes in tryptophan and downstream kynurenines on the clinical progression of AN require further investigation. Moreover, prospective clinical studies on larger cohorts of restrictive and binge-eating/purging AN patients and assessing the potential benefit of L-kynurenine as an add-on therapeutic agent, should follow.
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Affiliation(s)
- Charl Alberts
- Department of Experimental and Clinical Pharmacology, Medical University of Lublin, Jaczewskiego 8B, 20-059 Lublin, Poland
| | - Maja Owe-Larsson
- Department of Histology and Embryology, Center of Biostructure Research, Medical University of Warsaw, Chałubińskiego 5, 02-004 Warsaw, Poland
- Laboratory of Center for Preclinical Research, Department of Experimental and Clinical Physiology, Medical University of Warsaw, Banacha 1B, 02-097 Warsaw, Poland
| | - Ewa M. Urbanska
- Laboratory of Cellular and Molecular Pharmacology, Department of Experimental and Clinical Pharmacology, Medical University of Lublin, Jaczewskiego 8B, 20-059 Lublin, Poland
- Correspondence:
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7
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Chojnacki C, Gąsiorowska A, Popławski T, Konrad P, Chojnacki M, Fila M, Blasiak J. Beneficial Effect of Increased Tryptophan Intake on Its Metabolism and Mental State of the Elderly. Nutrients 2023; 15:847. [PMID: 36839204 PMCID: PMC9961537 DOI: 10.3390/nu15040847] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2023] [Revised: 02/04/2023] [Accepted: 02/06/2023] [Indexed: 02/11/2023] Open
Abstract
The elderly often suffer from sleep disorders and depression, which contribute to mood disorders. In our previous work, we showed that elderly individuals with mood disorders had a lower intake of TRP and recommended a TRP-based dietary intervention to improve the mental state of such individuals. In this work, we assessed the impact of a TRP-rich diet on the mental state of, and TRP metabolism in, elderly individuals with mood disorders. Forty elderly individuals with depression and sleep disorders and an equal number of elderly subjects without mood disorders were enrolled in this study. TRP intake was evaluated with the nutrition calculator. Patients with mood disorders had a lower TRP intake than their normal counterparts and received a TRP-rich diet with TRP content of 25 mg per kilogram of the body per day for 12 weeks. The mental state was assessed before and after this dietary intervention with the Hamilton Depression Rating Scale (HAM-D) and the Insomnia Severity Index (ISI). At those times, urinary levels of TRP and its metabolites 5-hydroxyindoleacetic acid (5-HIAA), L-kynurenine (KYN), kynurenic acid (KYNA), and quinolinic acid (QA) were determined by liquid chromatography with tandem mass spectrometry and related to creatinine level. After TRP-based dietary intervention, the score of ISI and HAM-D decreased by more than half. A correlation analysis reveals that TRP, 5-HIAA, and KYNA might have anti-depressive action, while KYN and QA-pro-depressive. The levels of TRP, 5-HIAA, and KYNA in urine of mood disorder patients increased, while the levels of KYN and QA decreased. In conclusion, dietary consumption of adequate amount of tryptophan has a beneficial effect on mental health of the elderly with mood disorders and improves metabolism of this amino acid. Therefore, a TRP-enriched diet may be considered as a component of the treatment of elderly individuals with mood disorders.
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Affiliation(s)
- Cezary Chojnacki
- Department of Clinical Nutrition and Gastroenterological Diagnostics, Medical University of Lodz, 90-647 Lodz, Poland
| | - Anita Gąsiorowska
- Department of Gastroenterology, Medical University of Lodz, 92-213 Lodz, Poland
| | - Tomasz Popławski
- Department of Pharmaceutical Microbiology and Biochemistry, Medical University of Lodz, 92-215 Lodz, Poland
| | - Paulina Konrad
- Department of Clinical Nutrition and Gastroenterological Diagnostics, Medical University of Lodz, 90-647 Lodz, Poland
| | - Marcin Chojnacki
- Department of Clinical Nutrition and Gastroenterological Diagnostics, Medical University of Lodz, 90-647 Lodz, Poland
| | - Michal Fila
- Department of Developmental Neurology and Epileptology, Polish Mother’s Memorial Hospital Research Institute, 93-338 Lodz, Poland
| | - Janusz Blasiak
- Department of Molecular Genetics, Faculty of Biology and Environmental Protection, University of Lodz, 90-236 Lodz, Poland
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8
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Rodriguez-Sanchez J, Lewis G, Solmi F, Bone JK, Moore M, Wiles N, Harmer CJ, Duffy L, Lewis G. Neuropsychological markers of antidepressant action: a secondary analysis of the ANTLER randomised controlled trial. Psychol Med 2023; 53:1-8. [PMID: 36727498 PMCID: PMC10600933 DOI: 10.1017/s0033291722003981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Revised: 11/17/2022] [Accepted: 12/21/2022] [Indexed: 02/03/2023]
Abstract
BACKGROUND Antidepressants have been proposed to act via their influence on emotional processing. We investigated the effect of discontinuing maintenance antidepressant treatment on positive and negative self-referential recall and the association between self-referential recall and risk of relapse. METHODS The ANTLER trial was a large (N = 478) pragmatic double-blind trial investigating the clinical effectiveness of long-term antidepressant treatment for preventing relapse in primary care patients. Participants were randomised to continue their maintenance antidepressants or discontinue via a taper to placebo. We analysed memory for positive and negative personality descriptors, assessed at baseline, 12- and 52-week follow-up. RESULTS The recall task was completed by 437 participants. There was no evidence of an effect of discontinuation on self-referential recall at 12 [positive recall ratio 1.00, 95% CI (0.90-1.11), p = 0.93; negative recall ratio 1.00 (0.87-1.14), p = 0.87] or 52 weeks [positive recall ratio 1.03 (0.91-1.17), p = 0.62; negative recall ratio 1.00 (0.86-1.15), p = 0.96; ratios larger than one indicate higher recall in the discontinuation group], and no evidence of an association between recall at baseline or 12 weeks and later relapse [baseline, positive hazard ratio (HR) 1.02 (0.93-1.12), p = 0.74; negative HR 1.01 (0.90-1.13), p = 0.87; 12 weeks, positive HR 0.99 (0.89-1.09), p = 0.81; negative HR 0.98 (0.84-1.14), p = 0.78; ratios larger than one indicate a higher frequency of relapse in those with higher recall]. CONCLUSIONS We found no evidence that discontinuing long-term antidepressants altered self-referential recall or that self-referential recall was associated with risk of relapse. These findings suggest that self-referential recall is not a neuropsychological marker of antidepressant action.
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Affiliation(s)
| | | | | | - Jessica K. Bone
- Department of Behavioural Science and Health, Institute of Epidemiology and Health Care, UCL, London, UK
| | - Michael Moore
- Primary Care Population Sciences and Medical Education, Faculty of Medicine, University of Southampton, Southampton, UK
| | - Nicola Wiles
- Centre for Academic Mental Health, Bristol Medical School, University of Bristol, Bristol, UK
| | - Catherine J. Harmer
- University Department of Psychiatry, Warneford Hospital, Oxford, UK
- Oxford Health NHS Foundation Trust, Warneford Hospital, Oxford, UK
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9
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Using type-2 fuzzy ontology to improve semantic interoperability for healthcare and diagnosis of depression. Artif Intell Med 2023; 135:102452. [PMID: 36628789 DOI: 10.1016/j.artmed.2022.102452] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2022] [Revised: 10/08/2022] [Accepted: 11/11/2022] [Indexed: 11/19/2022]
Abstract
Ontology enhances semantic interoperability through integrating health data from heterogeneous sources and sharing information in a meaningful way. In the field of smart health services, semantic interoperability means the exchange and interpretation of data without ambiguity and uncertainty. However, existing classical ontologies are not able to represent vague and uncertain knowledge, especially in contexts of mental health disorders which are associated with varying degrees of uncertainty and inaccuracy of diagnosis, and in this case, the treatment is a complex and common mental process necessitating to share information accurately and unambiguously. Type-2 fuzzy set theory can offer a fruitful solution in order to control uncertainty or express ambiguous concepts in a dynamic and complex environment such as healthcare systems. Herein, a semantic framework for healthcare, and also monitoring mental health disorders using type-2 fuzzy set theory based on the Internet of Thing (IoT) is suggested, in which all depression-related concepts are semantically annotated to share detailed information with the treatment staff. This framework not only paved the way to increasing the accuracy of medical diagnosis and decision-making but also provides the possibility of inference and semantic reasoning using the languages of SPARQL query and DL query.
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10
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Pivac N, Vuic B, Sagud M, Nedic Erjavec G, Nikolac Perkovic M, Konjevod M, Tudor L, Svob Strac D, Uzun S, Kozumplik O, Uzun S, Mimica N. PTSD, Immune System, and Inflammation. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2023; 1411:225-262. [PMID: 36949313 DOI: 10.1007/978-981-19-7376-5_11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/24/2023]
Abstract
Posttraumatic stress disorder (PTSD) is a severe trauma and stress-related disorder associated with different somatic comorbidities, especially cardiovascular and metabolic disorders, and with chronic low-grade inflammation. Altered balance of the hypothalamic-pituitary-adrenal (HPA) axis, cytokines and chemokines, C-reactive protein, oxidative stress markers, kynurenine pathways, and gut microbiota might be involved in the alterations of certain brain regions regulating fear conditioning and memory processes, that are all altered in PTSD. In addition to the HPA axis, the gut microbiota maintains the balance and interaction of the immune, CNS, and endocrine pathways forming the gut-brain axis. Disbalance in the HPA axis, gut-brain axis, oxidative stress pathways and kynurenine pathways, altered immune signaling and disrupted homeostasis, as well as the association of the PTSD with the inflammation and disrupted cognition support the search for novel strategies for treatment of PTSD. Besides potential anti-inflammatory treatment, dietary interventions or the use of beneficial bacteria, such as probiotics, can potentially improve the composition and the function of the bacterial community in the gut. Therefore, bacterial supplements and controlled dietary changes, with exercise, might have beneficial effects on the psychological and cognitive functions in patients with PTSD. These new treatments should be aimed to attenuate inflammatory processes and consequently to reduce PTSD symptoms but also to improve cognition and reduce cardio-metabolic disorders associated so frequently with PTSD.
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Affiliation(s)
- Nela Pivac
- Division of Molecular Medicine, Laboratory for Molecular Neuropsychiatry, Rudjer Boskovic Institute, Zagreb, Croatia.
| | - Barbara Vuic
- Division of Molecular Medicine, Laboratory for Molecular Neuropsychiatry, Rudjer Boskovic Institute, Zagreb, Croatia
| | - Marina Sagud
- Department of Psychiatry, University Hospital Center Zagreb, Zagreb, Croatia
- University of Zagreb School of Medicine, Zagreb, Croatia
| | - Gordana Nedic Erjavec
- Division of Molecular Medicine, Laboratory for Molecular Neuropsychiatry, Rudjer Boskovic Institute, Zagreb, Croatia
| | - Matea Nikolac Perkovic
- Division of Molecular Medicine, Laboratory for Molecular Neuropsychiatry, Rudjer Boskovic Institute, Zagreb, Croatia
| | - Marcela Konjevod
- Division of Molecular Medicine, Laboratory for Molecular Neuropsychiatry, Rudjer Boskovic Institute, Zagreb, Croatia
| | - Lucija Tudor
- Division of Molecular Medicine, Laboratory for Molecular Neuropsychiatry, Rudjer Boskovic Institute, Zagreb, Croatia
| | - Dubravka Svob Strac
- Division of Molecular Medicine, Laboratory for Molecular Neuropsychiatry, Rudjer Boskovic Institute, Zagreb, Croatia
| | - Suzana Uzun
- University of Zagreb School of Medicine, Zagreb, Croatia
- University Psychiatric Hospital Vrapce, Zagreb, Croatia
| | | | - Sandra Uzun
- Department for Anesthesiology, Reanimatology, and Intensive Care, University Hospital Center Zagreb, Zagreb, Croatia
| | - Ninoslav Mimica
- University of Zagreb School of Medicine, Zagreb, Croatia
- University Psychiatric Hospital Vrapce, Zagreb, Croatia
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11
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Hou Y, Liang J, Kuang X, Kuang R. Simultaneous electrochemical recognition of tryptophan and penicillamine enantiomers based on MOF-modified β-CD. Carbohydr Polym 2022; 290:119474. [DOI: 10.1016/j.carbpol.2022.119474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 04/06/2022] [Accepted: 04/07/2022] [Indexed: 11/02/2022]
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12
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Ainamani HE, Bamwerinde WM, Rukundo GZ, Tumwesigire S, Mfitumukiza V, Bikaitwoha EM, Tsai AC. Fruit and vegetable intake and mental health among family caregivers of people with dementia in Uganda. MENTAL HEALTH & PREVENTION 2021; 24:None. [PMID: 34900574 PMCID: PMC8641063 DOI: 10.1016/j.mhp.2021.200223] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Revised: 10/11/2021] [Indexed: 01/09/2023]
Abstract
Consumption of fruits and vegetables is correlated with improved mental wellbeing. Although this growing body of research has been recognized by researchers and clinicians in high-income countries, fewer studies examining this relationship have been conducted in low- and middle-income settings. In this study, we sought to estimate the association between fruit and vegetable intake and symptoms of depression and anxiety. We conducted a cross-sectional study among 242 family caregivers of people with dementia in southwestern Uganda. Fruit and vegetable intake in the past week was measured with a food frequency questionnaire. Depression and anxiety were assessed using the depression and anxiety subscales of the 42-item Depression, Anxiety and Stress Scales. Multivariable regression models were used to estimate the associations between fruits and vegetable consumption and depression and anxiety, adjusting for caregiving burden and other potential confounders. Depression symptom severity was negatively associated with consumption of jackfruits (b =-4.68; 95% confidence interval [CI], -8.96 to -0.39), green leafy vegetables (b =-14.1; 95% CI, -18.0 to -10.1), root vegetables (b =-14.0; 95% CI, -19.5 to -8.63), and other vegetables (b =-14.8; 95% CI, -19.3 to -10.3), and frequent consumption of vegetables (b =-1.91; 95% CI, -3.77 to -0.04). Anxiety symptom severity was negatively associated with consumption of green leafy vegetables (b =-12.2; 95% CI, -16.0 to -8.46), root vegetables (b=-12.6; 95% CI, -17.5 to -7.58), and other vegetables (b =-12.7; 95% CI, -17.0 to -8.40), and frequent consumption of vegetables (b =-2.07; 95% CI, -3.84 to -0.29). Our results suggest that fruit and vegetable consumption is associated with reduced depression and anxiety symptoms.
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Affiliation(s)
- Herbert E Ainamani
- Department of Mental Health, Kabale University School of Medicine, Kabale, Uganda, P. O. Box 317
| | - Wilson M Bamwerinde
- Department of Environment and Natural Resources Kabale University, Kabale, Uganda
| | - Godfrey Z Rukundo
- Department of Psychiatry, Mbarara University of Science and Technology, Mbarara, Uganda
| | - Sam Tumwesigire
- Department of Pediatrics, Kabale University School of Medicine, Kabale, Uganda
| | | | - Everd M Bikaitwoha
- Department of Pediatrics, Kabale University School of Medicine, Kabale, Uganda
| | - Alexander C Tsai
- Center for Global Health and Mongan Institute, Massachusetts General Hospital, Boston, United States
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13
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Solís-Ortiz S, Arriaga-Avila V, Trejo-Bahena A, Guevara-Guzmán R. Deficiency in the Essential Amino Acids l-Isoleucine, l-Leucine and l-Histidine and Clinical Measures as Predictors of Moderate Depression in Elderly Women: A Discriminant Analysis Study. Nutrients 2021; 13:nu13113875. [PMID: 34836128 PMCID: PMC8623361 DOI: 10.3390/nu13113875] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Accepted: 07/25/2021] [Indexed: 11/16/2022] Open
Abstract
Increases in depression are common in some elderly women. Elderly women often show moderate depressive symptoms, while others display minimal depressive symptoms. These discrepancies have produced contradictory and inconclusive outcomes, which have not been explained entirely by deficits in neurotransmitter precursors. Deficiency in some amino acids have been implicated in major depression, but its role in non-clinical elderly women is not well known. An analysis of essential amino acids, depression and the use of discriminant analysis can help to clarify the variation in depressive symptoms exhibited by some elderly women. The aim was to investigate the relationship of essential amino acids with affective, cognitive and comorbidity measures in elderly women without major depression nor severe mood disorders or psychosis, specifically thirty-six with moderate depressive symptoms and seventy-one with minimal depressive symptoms. The plasma concentrations of nineteen amino acids, Beck Depression Inventory (BDI) scores, Geriatric Depression Scale (GDS) scores, global cognitive scores and comorbidities were submitted to stepwise discriminant analysis to identify predictor variables. Seven predictors arose as important for belong to the group based on amino acid concentrations, with the moderate depressive symptoms group characterized by higher BDI, GDS and cognitive scores; fewer comorbidities; and lower levels of l-histidine, l-isoleucine and l-leucine. These findings suggest that elderly women classified as having moderate depressive symptoms displayed a deficiency in essential amino acids involved in metabolism, protein synthesis, inflammation and neurotransmission.
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Affiliation(s)
- Silvia Solís-Ortiz
- Departamento de Ciencias Médicas, División de Ciencias de la Salud, Campus León, Universidad de Guanajuato, León, Guanajuato 37320, Mexico;
- Correspondence: ; Tel./Fax: +52-477-7145859
| | - Virginia Arriaga-Avila
- Facultad de Medicina, Universidad Nacional Autónoma de México, Ciudad de México 04510, Mexico; (V.A.-A.); (R.G.-G.)
| | - Aurora Trejo-Bahena
- Departamento de Ciencias Médicas, División de Ciencias de la Salud, Campus León, Universidad de Guanajuato, León, Guanajuato 37320, Mexico;
| | - Rosalinda Guevara-Guzmán
- Facultad de Medicina, Universidad Nacional Autónoma de México, Ciudad de México 04510, Mexico; (V.A.-A.); (R.G.-G.)
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14
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Aucoin M, LaChance L, Cooley K, Kidd S. Diet and Psychosis: A Scoping Review. Neuropsychobiology 2020; 79:20-42. [PMID: 30359969 DOI: 10.1159/000493399] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Accepted: 08/29/2018] [Indexed: 12/11/2022]
Abstract
INTRODUCTION Schizophrenia spectrum disorders (SSD) represent a cluster of severe mental illnesses. Diet has been identified as a modifiable risk factor and opportunity for intervention in many physical illnesses and more recently in mental illnesses such as unipolar depression; however, no dietary guidelines exist for patients with SSD. OBJECTIVE This review sought to systematically scope the existing literature in order to identify nutritional interventions for the prevention or treatment of mental health symptoms in SSD as well as gaps and opportunities for further research. METHODS This review followed established methodological approaches for scoping reviews including an extensive a priori search strategy and duplicate screening. Because of the large volume of results, an online program (Abstrackr) was used for screening and tagging. Data were extracted based on the dietary constituents and analyzed. RESULTS Of 55,330 results identified by the search, 822 studies met the criteria for inclusion. Observational evidence shows a connection between the presence of psychotic disorders and poorer quality dietary patterns, higher intake of refined carbohydrates and total fat, and lower intake or levels of fibre, ω-3 and ω-6 fatty acids, vegetables, fruit, and certain vitamins and minerals (vitamin B12 and B6, folate, vitamin C, zinc, and selenium). Evidence illustrates a role of food allergy and sensitivity as well as microbiome composition and specific phytonutrients (such as L-theanine, sulforaphane, and resveratrol). Experimental studies have demonstrated benefit using healthy diet patterns and specific vitamins and minerals (vitamin B12 and B6, folate, and zinc) and amino acids (serine, lysine, glycine, and tryptophan). DISCUSSION Overall, these findings were consistent with many other bodies of knowledge about healthy dietary patterns. Many limitations exist related to the design of the individual studies and the ability to extrapolate the results of studies using dietary supplements to dietary interventions (food). Dietary recommendations are presented as well as recommendations for further research including more prospective observational studies and intervention studies that modify diet constituents or entire dietary patterns with statistical power to detect mental health outcomes.
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Affiliation(s)
- Monique Aucoin
- Canadian College of Naturopathic Medicine, Toronto, Ontario, Canada,
| | - Laura LaChance
- Centre for Addiction and Mental Health, Toronto, Ontario, Canada.,University of Toronto, Toronto, Ontario, Canada
| | - Kieran Cooley
- Canadian College of Naturopathic Medicine, Toronto, Ontario, Canada.,Australian Research Centre in Complementary and Integrative Medicine, University of Technology, Sydney, New South Wales, Australia
| | - Sean Kidd
- Centre for Addiction and Mental Health, Toronto, Ontario, Canada
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15
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Langgartner D, Lowry CA, Reber SO. Old Friends, immunoregulation, and stress resilience. Pflugers Arch 2019; 471:237-269. [PMID: 30386921 PMCID: PMC6334733 DOI: 10.1007/s00424-018-2228-7] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Revised: 10/03/2018] [Accepted: 10/22/2018] [Indexed: 02/07/2023]
Abstract
There is a considerable body of evidence indicating that chronic adverse experience, especially chronic psychosocial stress/trauma, represents a major risk factor for the development of many somatic and affective disorders, including inflammatory bowel disease (IBD) and posttraumatic stress disorder (PTSD). However, the mechanisms underlying the development of chronic stress-associated disorders are still in large part unknown, and current treatment and prevention strategies lack efficacy and reliability. A greater understanding of mechanisms involved in the development and persistence of chronic stress-induced disorders may lead to novel approaches to prevention and treatment of these disorders. In this review, we provide evidence indicating that increases in immune (re-)activity and inflammation, potentially promoted by a reduced exposure to immunoregulatory microorganisms ("Old Friends") in today's modern society, may be causal factors in mediating the vulnerability to development and persistence of stress-related pathologies. Moreover, we discuss strategies to increase immunoregulatory processes and attenuate inflammation, as for instance contact with immunoregulatory Old Friends, which appears to be a promising strategy to promote stress resilience and to prevent/treat chronic stress-related disorders.
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Affiliation(s)
- Dominik Langgartner
- Laboratory for Molecular Psychosomatics, Department of Psychosomatic Medicine and Psychotherapy, University Ulm, Albert-Einstein-Allee 23, 89081, Ulm, Germany
| | - Christopher A Lowry
- Department of Integrative Physiology and Center for Neuroscience, University of Colorado Boulder, Boulder, CO, 80309, USA
- Department of Physical Medicine & Rehabilitation and Center for Neuroscience, University of Colorado Anschutz Medical Campus, Aurora, CO, 80045, USA
- Veterans Health Administration, Rocky Mountain Mental Illness Research Education and Clinical Center (MIRECC), Denver Veterans Affairs Medical Center (VAMC), Denver, CO, 80220, USA
- Military and Veteran Microbiome Consortium for Research and Education (MVM-CoRE), Denver, CO, 80220, USA
| | - Stefan O Reber
- Laboratory for Molecular Psychosomatics, Department of Psychosomatic Medicine and Psychotherapy, University Ulm, Albert-Einstein-Allee 23, 89081, Ulm, Germany.
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16
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Lei P, Zhou Y, Zhang G, Zhang Y, Zhang C, Hong S, Yang Y, Dong C, Shuang S. A highly efficient chiral sensing platform for tryptophan isomers based on a coordination self-assembly. Talanta 2018; 195:306-312. [PMID: 30625547 DOI: 10.1016/j.talanta.2018.11.084] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Revised: 11/13/2018] [Accepted: 11/22/2018] [Indexed: 01/16/2023]
Abstract
Construction of convenient and effective method for enantiomer identification is of vital significance for biochemistry and medical science. Herein, we design an effective sensor for chiral recognition of tryptophan (Trp) enantiomers, and self-assembly of Cu2+-modified β-cyclodextrin on poly-L-arginine/multi-walled carbon nanotubes (Cu-β-CD/PLA/MWCNTs) is studied. Meanwhile, Cu2+ acts as a cap to prevent the release of the high energy water and compel Trp enantiomer into the smaller opening of β-cyclodextrin. Recognition of L-Trp is accomplished by the formation of hydrogen bonds between the amino of L-Trp and the high energy water confined in cavity of Cu-β-CD. Compared with D-Trp, the sensor exhibits favorable chiral recognition toward L-Trp with a separation coefficient of 3.37. And the chiral sensor presents admirable enantiomers determination with excellent sensitivity, providing a good linear correlation in the range of 1 × 10-6 M~5.5 × 10-5 M, and the detection limit can reach 3.3 × 10-7 M (S/N = 3). Besides, the proposed sensor has been able to predict the percentage of D-Trp in the racemic mixture, suggesting its potential applications in the enantiomer recognition field.
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Affiliation(s)
- Peng Lei
- School of Chemistry and Chemical Engineering, and Institute of Environmental Science, Shanxi University, Taiyuan 030006, China
| | - Ying Zhou
- School of Chemistry and Chemical Engineering, and Institute of Environmental Science, Shanxi University, Taiyuan 030006, China
| | - Guomei Zhang
- School of Chemistry and Chemical Engineering, and Institute of Environmental Science, Shanxi University, Taiyuan 030006, China
| | - Yan Zhang
- School of Chemistry and Chemical Engineering, and Institute of Environmental Science, Shanxi University, Taiyuan 030006, China
| | - Caihong Zhang
- School of Chemistry and Chemical Engineering, and Institute of Environmental Science, Shanxi University, Taiyuan 030006, China
| | - Shasha Hong
- School of Chemistry and Chemical Engineering, and Institute of Environmental Science, Shanxi University, Taiyuan 030006, China
| | - Yajuan Yang
- School of Chemistry and Chemical Engineering, and Institute of Environmental Science, Shanxi University, Taiyuan 030006, China
| | - Chuan Dong
- School of Chemistry and Chemical Engineering, and Institute of Environmental Science, Shanxi University, Taiyuan 030006, China
| | - Shaomin Shuang
- School of Chemistry and Chemical Engineering, and Institute of Environmental Science, Shanxi University, Taiyuan 030006, China.
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17
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Liebenberg N, Jensen E, Larsen ER, Kousholt BS, Pereira VS, Fischer CW, Wegener G. A Preclinical Study of Casein Glycomacropeptide as a Dietary Intervention for Acute Mania. Int J Neuropsychopharmacol 2018; 21:473-484. [PMID: 29726996 PMCID: PMC5932479 DOI: 10.1093/ijnp/pyy012] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/10/2017] [Accepted: 02/06/2018] [Indexed: 11/22/2022] Open
Abstract
BACKGROUND Casein glycomacropeptide is a peptide that lacks phenylalanine, tyrosine, and tryptophan. This profile may enable it to deplete phenylalanine, tyrosine, and tryptophan, and subsequently the synthesis of dopamine and serotonin in the brain. Dopamine- and serotonin-depleting amino acid mixtures have shown promise as acute antimanic treatments. In this study, we explore the depleting effects on amino acids, dopamine and serotonin as well as its actions on manic-like and other behavior in rats. METHODS Casein glycomacropeptide and a selection of amino acid mixtures were administered orally at 2, 4, or 8 h or for 1 week chronically. Amino acid and monoamine levels were measured in plasma and brain and behavior was assessed in the amphetamine-hyperlocomotion, forced swim, prepulse inhibition, and elevated plus maze tests. RESULTS Casein glycomacropeptide induced a time-dependent reduction in tyrosine, tryptophan, and phenylalanine in brain and plasma which was augmented by supplementing with leucine. Casein glycomacropeptide +leucine reduced dopamine in the frontal cortex and serotonin in the hippocampus, frontal cortex, and striatum after 2 and 4 h. Casein glycomacropeptide+leucine also had antimanic activity in the amphetamine-induced hyperlocomotion test at 2 h after a single acute treatment and after 1 week of chronic treatment. CONCLUSIONS Casein glycomacropeptide-based treatments and a branched-chain amino acid mixture affected total tissue levels of dopamine in the frontal cortex and striatum and serotonin in the frontal cortex, striatum, and hippocampus of rats in a time-dependent fashion and displayed antimanic efficacy in a behavioral assay of mania.
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Affiliation(s)
- Nico Liebenberg
- Translational Neuropsychiatry Unit, Department of Clinical Medicine, Aarhus University, Denmark
| | | | - Erik Roj Larsen
- Department Psychiatry Odense, Psychiatry in the Region of Southern Denmark, Denmark,Department of Psychiatry, Institute for Clinical Research, University of Southern Denmark, Denmark
| | - Birgitte Saima Kousholt
- Department of Clinical Medicine, Aarhus University, Aarhus, Denmark,Department of Clinical Medicine, AUGUST Centre, Aarhus University, Risskov, Denmark
| | - Vitor Silva Pereira
- Translational Neuropsychiatry Unit, Department of Clinical Medicine, Aarhus University, Denmark
| | - Christina Weide Fischer
- Translational Neuropsychiatry Unit, Department of Clinical Medicine, Aarhus University, Denmark
| | - Gregers Wegener
- Translational Neuropsychiatry Unit, Department of Clinical Medicine, Aarhus University, Denmark,Department of Clinical Medicine, AUGUST Centre, Aarhus University, Risskov, Denmark,Centre for Pharmaceutical Excellence, School of Pharmacy, North-West University, South Africa,Correspondence: Gregers Wegener, Translational Neuropsychiatry Unit, Aarhus University Hospital, Skovagervej 2, 8240 Risskov, Denmark ()
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18
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Mukherjee D, Krishnamurthy VB, Millett CE, Reider A, Can A, Groer M, Fuchs D, Postolache TT, Saunders EF. Total sleep time and kynurenine metabolism associated with mood symptom severity in bipolar disorder. Bipolar Disord 2018; 20:27-34. [PMID: 28833866 PMCID: PMC5807208 DOI: 10.1111/bdi.12529] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/23/2016] [Revised: 06/14/2017] [Accepted: 06/21/2017] [Indexed: 12/22/2022]
Abstract
OBJECTIVE Chronic, low-level inflammation is associated with symptomatic bipolar disorder (BD) and with chronic insomnia. Disrupted sleep is a feature of episodes of both mania and depression. We examined the effect of neopterin, a marker of cellular immune activation, and kynurenine (KYN), an inflammatory byproduct of the serotonin pathway, on the association between total sleep time and depression severity in BD. METHOD Twenty-one symptomatic BD participants and 28 healthy controls (HC) were recruited and followed during usual clinical care. At baseline and after symptomatic recovery, total sleep time was objectively measured with actigraphy for 1 week and blood plasma was collected to measure the serotonin precursor tryptophan (TRP), KYN, the KYN/TRP ratio, and neopterin levels. Statistical analyses were conducted using chi-square, independent t tests and hierarchical linear multiple regression models. RESULTS Total sleep time was correlated positively with depressive severity and negatively with manic severity. TRP was significantly reduced in BD participants compared to HC. KYN, TRP, and the KYN/TRP ratio were associated with depressive severity when total sleep time and body mass index (BMI) were included in the model. The KYN/TRP ratio trended towards a negative association with mania symptoms, controlling for BMI and total sleep time, in acutely symptomatic BD participants. Neopterin was not associated with sleep or mood severity. After usual clinical care, BD participants showed significantly decreased clinical symptoms but no significant differences in sleep phenotype or biomarkers. CONCLUSION Inflammation, sleep, and mood are closely intertwined. Future research into the effect of inflammation on sleep in BD may lead to clinical markers of outcome.
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Affiliation(s)
- Dahlia Mukherjee
- Department of Psychiatry, Penn State Milton S Hershey Medical Center, Hershey, PA
| | - Venkatesh Bassapa Krishnamurthy
- Department of Psychiatry, Penn State Milton S Hershey Medical Center, Hershey, PA,Sleep Research and Treatment Center, Penn State Milton S Hershey Medical Center, Hershey, PA
| | - Caitlin E. Millett
- Department of Psychiatry, Penn State Milton S Hershey Medical Center, Hershey, PA,Department of Neural and Behavioral Sciences, Penn State University, Hershey, PA
| | - Aubrey Reider
- Department of Psychiatry, Penn State Milton S Hershey Medical Center, Hershey, PA
| | - Adem Can
- University of Maryland School of Medicine, Baltimore, MD
| | - Maureen Groer
- University of South Florida, School of Nursing, Tampa FL
| | | | - Teodor T Postolache
- University of Maryland School of Medicine, Baltimore, MD,Rocky Mountain MIRECC (Mental Illness Research, Education and Clinical Center), Denver, Co,The Military and Veteran Microbiome, Consortium for Research and Education (MVM-Core), Denver, Colorado
| | - Erika F.H. Saunders
- Department of Psychiatry, Penn State Milton S Hershey Medical Center, Hershey, PA,University of Michigan Department of Psychiatry, University of Michigan Medical School, Ann Arbor, Michigan
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19
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Exploring a post-traumatic stress disorder paradigm in Flinders sensitive line rats to model treatment-resistant depression II: response to antidepressant augmentation strategies. Acta Neuropsychiatr 2017; 29:207-221. [PMID: 27692010 DOI: 10.1017/neu.2016.50] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
OBJECTIVE Post-traumatic stress disorder (PTSD) displays high co-morbidity with major depression and treatment-resistant depression (TRD). Earlier work demonstrated exaggerated depressive-like symptoms in a gene×environment model of TRD and an abrogated response to imipramine. We extended the investigation by studying the behavioural and monoaminergic response to multiple antidepressants, viz. venlafaxine and ketamine with/without imipramine. METHODS Male Flinders sensitive line (FSL) rats, a genetic model of depression, were exposed to a time-dependent sensitisation (TDS) model of PTSD and compared with stress naive controls. 7 days after the TDS procedures, immobility and coping (swimming and climbing), behaviours in the forced swim test (FST) as well as hippocampal and cortical 5-hydroxyindoleacetic acid (5HIAA) and noradrenaline (NA) levels were analysed. Response to imipramine, venlafaxine and ketamine treatment (all 10 mg/kg×7 days) alone and in combination were subsequently studied. RESULTS TDS exacerbated depressive-like behaviour of FSL rats in the FST. Imipramine, venlafaxine and ketamine were ineffective as monotherapy in TDS-exposed FSL rats. However, combining imipramine with either venlafaxine or ketamine resulted in significant anti-immobility effects and enhanced coping behaviours. Only ketamine+imipramine (frontal-cortical 5HIAA and NA), ketamine alone (frontal-cortical and hippocampal NA) and venlafaxine+imipramine (frontal-cortical NA) altered monoamine responses versus untreated TDS-exposed FSL rats. CONCLUSION Exposure of FSL rats to TDS inhibits antidepressant response at behavioural and neurochemical levels. Congruent with TRD, imipramine plus venlafaxine or ketamine overcame treatment resistance in these animals. These data further support the hypothesis that exposure of FSL rats to a PTSD-like paradigm produces a valid animal model of TRD and warrants further investigation.
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Won E, Kim YK. Stress, the Autonomic Nervous System, and the Immune-kynurenine Pathway in the Etiology of Depression. Curr Neuropharmacol 2017; 14:665-73. [PMID: 27640517 PMCID: PMC5050399 DOI: 10.2174/1570159x14666151208113006] [Citation(s) in RCA: 155] [Impact Index Per Article: 22.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Revised: 10/17/2015] [Accepted: 11/01/2015] [Indexed: 12/27/2022] Open
Abstract
The autonomic nervous system is one of the major neural pathways activated by stress. In situations that are often associated with chronic stress, such as major depressive disorder, the sympathetic nervous system can be continuously activated without the normal counteraction of the parasympathetic nervous system. As a result, the immune system can be activated with increased levels of pro-inflammatory cytokines. These inflammatory conditions have been repeatedly observed in depression. In the search for the mechanism by which the immune system might contribute to depression, the enhanced activity of indoleamine 2,3-dioxygenase by pro-inflammatory cytokines has been suggested to play an important role. Indoleamine 2,3-dioxygenase is the first enzyme in the kynurenine pathway that converts tryptophan to kynurenine. Elevated activity of this enzyme can cause imbalances in downstream kynurenine metabolites. This imbalance can induce neurotoxic changes in the brain and create a vulnerable glial-neuronal network, which may render the brain susceptible to depression. This review focuses on the interaction between stress, the autonomic nervous system and the immune system which can cause imbalances in the kynurenine pathway, which may ultimately lead to major depressive disorder.
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Affiliation(s)
| | - Yong-Ku Kim
- Department of Psychiatry, Korea University Ansan Hospital, College of Medicine, 123 Jeokgeum-ro, Danwon-gu, Ansan 425-021, Republic of Korea
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Raab K, Kirsch P, Mier D. Understanding the impact of 5-HTTLPR, antidepressants, and acute tryptophan depletion on brain activation during facial emotion processing: A review of the imaging literature. Neurosci Biobehav Rev 2016; 71:176-197. [DOI: 10.1016/j.neubiorev.2016.08.031] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2016] [Revised: 07/28/2016] [Accepted: 08/26/2016] [Indexed: 12/22/2022]
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Ormstad H, Eilertsen G. A biopsychosocial model of fatigue and depression following stroke. Med Hypotheses 2015; 85:835-41. [DOI: 10.1016/j.mehy.2015.10.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Accepted: 10/02/2015] [Indexed: 11/28/2022]
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Moreno FA, Erickson RP, Garriock HA, Gelernter J, Mintz J, Oas-Terpstra J, Davies MA, Delgado PL. Association Study of Genotype by Depressive Response during Tryptophan Depletion in Subjects Recovered from Major Depression. MOLECULAR NEUROPSYCHIATRY 2015; 1:165-174. [PMID: 26528486 DOI: 10.1159/000439114] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
PURPOSE The brief and reversible mood response to acute tryptophan (TRP) depletion (ATD) is being studied as a trait marker in subjects considered at risk for major depression (MD). PROCEDURES ATD was administered to 64 subjects (54 European-Americans, and10 from other races) with personal and family history of MD. They were in remission and had been medication-free for at least three months. Subjects received an active and sham condition in a random assignment, double-blind crossover design. They were genotyped for serotonin-related candidate genes, and mood response was quantified with the Hamilton Depression Rating Scale (HDRS). Data were analyzed using Poisson regression with repeated measures and latent trajectory models. RESULTS Compared to the sham control, active ATD caused modest depressive changes showing significant main effects of test condition (χ2=5.14, df=1, p=0.023) and time (χ2=12.22, df=3, p=0.007), but no significant interaction of time and test condition. Latent trajectory analysis revealed two groups, identified as depletion responders and non-responders. Those with the HTR2A rs6313 CC genotype had significantly higher HDRS scores during ATD (χ2=11.72, df=1, p=.0006). CONCLUSIONS AND MESSAGE ATD may help the identification of biological subtypes of MD. These data are consistent with imaging reports implicating 5-HT2A receptor function in ATD phenotypes.
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Affiliation(s)
- Francisco A Moreno
- Department of Psychiatry, College of Medicine, The University of Arizona Health Sciences Center, USA
| | - Robert P Erickson
- Department of Pediatrics, College of Medicine, The University of Arizona Health Sciences Center, USA
| | - Holly A Garriock
- Division of Translational Research (DTR), National Institute of Mental Health, USA
| | - Joel Gelernter
- Department of Psychiatry, Yale University School of Medicine, VA Connecticut Health Care Center, USA
| | - Jim Mintz
- Department of Psychiatry, University of Texas Health Sciences Center San Antonio, USA
| | - Jennifer Oas-Terpstra
- Department of Physiology, College of Medicine, The University of Arizona Health Sciences Center, USA
| | - Marilyn A Davies
- Health and Community Systems, University of Pittsburgh School of Nursing, USA
| | - Pedro L Delgado
- Department of Psychiatry, University of Arkansas for Medical Sciences, USA
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Guo D, Huang Y, Chen C, Chen Y, Fu Y. A sensing interface for recognition of tryptophan enantiomers based on porous cluster-like nanocomposite films. NEW J CHEM 2014. [DOI: 10.1039/c4nj01484g] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Tiger M, Rück C, Forsberg A, Varrone A, Lindefors N, Halldin C, Farde L, Lundberg J. Reduced 5-HT(1B) receptor binding in the dorsal brain stem after cognitive behavioural therapy of major depressive disorder. Psychiatry Res 2014; 223:164-70. [PMID: 24916155 DOI: 10.1016/j.pscychresns.2014.05.011] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/06/2013] [Revised: 05/08/2014] [Accepted: 05/19/2014] [Indexed: 12/15/2022]
Abstract
Major depression is a significant contributor to the global burden of disease, and its pathophysiology is largely unknown. The serotonin hypothesis is, however, the model with most supporting data, although the details are only worked out to some extent. Recent clinical imaging measurements indeed imply a role in major depressive disorder (MDD) for the inhibitory serotonin autoreceptor 5-hydroxytryptamine1B (5-HT1B). The aim of the current study was to examine 5-HT1B receptor binding in the brain of MDD patients before and after psychotherapy. Ten patients with an ongoing untreated moderate depressive episode were examined with positron emission tomography (PET) and the 5-HT1B receptor selective radioligand [(11)C]AZ10419369, before and after treatment with internet-based cognitive behavioural therapy. All of the patients examined responded to treatment, and 70% were in remission by the time of the second PET measurement. A statistically significant 33% reduction of binding potential (BPND) was found in the dorsal brain stem (DBS) after treatment. No other significant changes in BPND were found. The DBS contains the raphe nuclei, which regulate the serotonin system. This study gives support for the importance of serotonin and the 5-HT1B receptor in the biological response to psychological treatment of MDD.
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Affiliation(s)
- Mikael Tiger
- Department of Clinical Neuroscience, Karolinska Institutet, Centrum för psykiatriforskning, R5:0, Karolinska Universitetssjukhuset i Solna, 171 76 Stockholm, Sweden.
| | - Christian Rück
- Department of Clinical Neuroscience, Karolinska Institutet, Centrum för psykiatriforskning, R5:0, Karolinska Universitetssjukhuset i Solna, 171 76 Stockholm, Sweden
| | - Anton Forsberg
- Department of Clinical Neuroscience, Karolinska Institutet, Centrum för psykiatriforskning, R5:0, Karolinska Universitetssjukhuset i Solna, 171 76 Stockholm, Sweden
| | - Andrea Varrone
- Department of Clinical Neuroscience, Karolinska Institutet, Centrum för psykiatriforskning, R5:0, Karolinska Universitetssjukhuset i Solna, 171 76 Stockholm, Sweden
| | - Nils Lindefors
- Department of Clinical Neuroscience, Karolinska Institutet, Centrum för psykiatriforskning, R5:0, Karolinska Universitetssjukhuset i Solna, 171 76 Stockholm, Sweden
| | - Christer Halldin
- Department of Clinical Neuroscience, Karolinska Institutet, Centrum för psykiatriforskning, R5:0, Karolinska Universitetssjukhuset i Solna, 171 76 Stockholm, Sweden
| | - Lars Farde
- Department of Clinical Neuroscience, Karolinska Institutet, Centrum för psykiatriforskning, R5:0, Karolinska Universitetssjukhuset i Solna, 171 76 Stockholm, Sweden
| | - Johan Lundberg
- Department of Clinical Neuroscience, Karolinska Institutet, Centrum för psykiatriforskning, R5:0, Karolinska Universitetssjukhuset i Solna, 171 76 Stockholm, Sweden
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Sobczak S, Schruers K. Can formulation affect tryptophan depletion results? Hints from studies in experimental panic. J Psychopharmacol 2014; 28:486-90. [PMID: 24429220 DOI: 10.1177/0269881113517954] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
RATIONALE Acute Tryptophan Depletion (ATD) is a specific serotonergic challenge tool. Central serotonergic effects of different ATD procedures are possibly not those that are usually assumed. OBJECTIVES In this paper we review data of ATD in an experimental fear model to investigate whether and how methodological differences may affect fear outcomes. Next we point to discrepancies of studies in our laboratory in order to test the hypotheses formulated in the review. METHODS Literature was searched in PubMed and MEDLINE and studies of our laboratory were compared. RESULTS Eight studies were included in the review: five in patients with panic disorder, three in healthy individuals. Methodologically the studies in our laboratory were quite similar except for the applied ATD mixtures. CONCLUSIONS ATD exerts fear-enhancing effects in patients with panic disorders, more than in healthy individuals. However, our findings are inconclusive. The discrepant findings of studies in our laboratory can possibly be explained by differences in the ATD mixtures used. We suggest mechanisms as to how these might have affected the central availability of tryptophan and hence serotonin.
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Affiliation(s)
- Sjacko Sobczak
- 1Mondriaan Department of Old Age Psychiatry/Department of Psychiatry and Neuropsychology, Maastricht University, Maastricht, The Netherlands
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Renoir T, Hasebe K, Gray L. Mind and body: how the health of the body impacts on neuropsychiatry. Front Pharmacol 2013; 4:158. [PMID: 24385966 PMCID: PMC3866391 DOI: 10.3389/fphar.2013.00158] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2013] [Accepted: 11/30/2013] [Indexed: 12/24/2022] Open
Abstract
It has long been established in traditional forms of medicine and in anecdotal knowledge that the health of the body and the mind are inextricably linked. Strong and continually developing evidence now suggests a link between disorders which involve Hypothalamic-Pituitary-Adrenal axis (HPA) dysregulation and the risk of developing psychiatric disease. For instance, adverse or excessive responses to stressful experiences are built into the diagnostic criteria for several psychiatric disorders, including depression and anxiety disorders. Interestingly, peripheral disorders such as metabolic disorders and cardiovascular diseases are also associated with HPA changes. Furthermore, many other systemic disorders associated with a higher incidence of psychiatric disease involve a significant inflammatory component. In fact, inflammatory and endocrine pathways seem to interact in both the periphery and the central nervous system (CNS) to potentiate states of psychiatric dysfunction. This review synthesizes clinical and animal data looking at interactions between peripheral and central factors, developing an understanding at the molecular and cellular level of how processes in the entire body can impact on mental state and psychiatric health.
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Affiliation(s)
- Thibault Renoir
- Melbourne Brain Centre, Florey Institute of Neuroscience and Mental Health, University of MelbourneMelbourne, VIC, Australia
| | - Kyoko Hasebe
- School of Medicine, Deakin UniversityGeelong, VIC, Australia
| | - Laura Gray
- School of Medicine, Deakin UniversityGeelong, VIC, Australia
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Walker AK, Kavelaars A, Heijnen CJ, Dantzer R. Neuroinflammation and comorbidity of pain and depression. Pharmacol Rev 2013; 66:80-101. [PMID: 24335193 DOI: 10.1124/pr.113.008144] [Citation(s) in RCA: 315] [Impact Index Per Article: 28.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Comorbid depression and chronic pain are highly prevalent in individuals suffering from physical illness. Here, we critically examine the possibility that inflammation is the common mediator of this comorbidity, and we explore the implications of this hypothesis. Inflammation signals the brain to induce sickness responses that include increased pain and negative affect. This is a typical and adaptive response to acute inflammation. However, chronic inflammation induces a transition from these typical sickness behaviors into depression and chronic pain. Several mechanisms can account for the high comorbidity of pain and depression that stem from the precipitating inflammation in physically ill patients. These mechanisms include direct effects of cytokines on the neuronal environment or indirect effects via downregulation of G protein-coupled receptor kinase 2, activation of the tryptophan-degrading enzyme indoleamine 2,3-dioxygenase that generates neurotropic kynurenine metabolites, increased brain extracellular glutamate, and the switch of GABAergic neurotransmission from inhibition to excitation. Despite the existence of many neuroimmune candidate mechanisms for the co-occurrence of depression and chronic pain, little work has been devoted so far to critically assess their mediating role in these comorbid symptoms. Understanding neuroimmune mechanisms that underlie depression and pain comorbidity may yield effective pharmaceutical targets that can treat both conditions simultaneously beyond traditional antidepressants and analgesics.
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Affiliation(s)
- A K Walker
- Department of Symptom Research Laboratory of Neuroimmunology of Cancer-Related Symptoms at the Institute of Biosciences and Technology, Texas A&M Health Sciences Center, 2121 W. Holcombe Boulevard, Room 1025, Houston, TX 77030.
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Vigod SN, Taylor VH. The psychodynamic psychotherapist's guide to the interaction among sex, genes, and environmental adversity in the etiology of depression for women. Psychodyn Psychiatry 2013; 41:541-561. [PMID: 24283447 DOI: 10.1521/pdps.2013.41.4.541] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
From menarche to menopause, women are highly vulnerable to major depression. While biological and psychosocial differences between men and women have been established, the reason for the preponderance of depression in women has yet to be fully elucidated. Women may be predisposed to depressive illness because of biological factors related to brain structure, function, and the impact of reproductive life stages. They may also be at increased risk because they are differentially disadvantaged with respect to environmental stressors including interpersonal violence, socioeconomic instability, and caregiving burden, among others. However, not all women develop depression, nor do all individuals who suffer from adverse life events. This narrative review focuses on emerging research related to the interaction between sex, genetics, and environmental factors that may help offer clues about why some individuals suffer from depression, and why others may be resilient to this outcome. While many questions remain unanswered, the psychodynamic psychotherapist can use this information to help patients suffering from depression understand some of the complexities of the determinants of risk and resilience, with the goal of moving forward toward recovery.
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Duke AA, Bègue L, Bell R, Eisenlohr-Moul T. Revisiting the serotonin-aggression relation in humans: a meta-analysis. Psychol Bull 2013; 139:1148-72. [PMID: 23379963 PMCID: PMC3718863 DOI: 10.1037/a0031544] [Citation(s) in RCA: 156] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The inverse relation between serotonin and human aggression is often portrayed as "reliable," "strong," and "well established" despite decades of conflicting reports and widely recognized methodological limitations. In this systematic review and meta-analysis, we evaluate the evidence for and against the serotonin deficiency hypothesis of human aggression across 4 methods of assessing serotonin: (a) cerebrospinal fluid levels of 5-hydroxyindoleacetic acid (CSF 5-HIAA), (b) acute tryptophan depletion, (c) pharmacological challenge, and (d) endocrine challenge. Results across 175 independent samples and over 6,500 total participants were heterogeneous, but, in aggregate, revealed a small, inverse correlation between serotonin functioning and aggression, anger, and hostility (r = -.12). Pharmacological challenge studies had the largest mean weighted effect size (r = -.21), and CSF 5-HIAA studies had the smallest (r = -.06). Potential methodological and demographic moderators largely failed to account for variability in study outcomes. Notable exceptions included year of publication (effect sizes tended to diminish with time) and self- versus other-reported aggression (other-reported aggression was positively correlated to serotonin functioning). We discuss 4 possible explanations for the pattern of findings: unreliable measures, ambient correlational noise, an unidentified higher order interaction, and a selective serotonergic effect. Finally, we provide 4 recommendations for bringing much needed clarity to this important area of research: acknowledge contradictory findings and avoid selective reporting practices; focus on improving the reliability and validity of serotonin and aggression measures; test for interactions involving personality and/or environmental moderators; and revise the serotonin deficiency hypothesis to account for serotonin's functional complexity.
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Coppola A, Wenner BR, Ilkayeva O, Stevens RD, Maggioni M, Slotkin TA, Levin ED, Newgard CB. Branched-chain amino acids alter neurobehavioral function in rats. Am J Physiol Endocrinol Metab 2013; 304:E405-13. [PMID: 23249694 PMCID: PMC3566503 DOI: 10.1152/ajpendo.00373.2012] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Recently, we have described a strong association of branched-chain amino acids (BCAA) and aromatic amino acids (AAA) with obesity and insulin resistance. In the current study, we have investigated the potential impact of BCAA on behavioral functions. We demonstrate that supplementation of either a high-sucrose or a high-fat diet with BCAA induces anxiety-like behavior in rats compared with control groups fed on unsupplemented diets. These behavioral changes are associated with a significant decrease in the concentration of tryptophan (Trp) in brain tissues and a consequent decrease in serotonin but no difference in indices of serotonin synaptic function. The anxiety-like behaviors and decreased levels of Trp in the brain of BCAA-fed rats were reversed by supplementation of Trp in the drinking water but not by administration of fluoxetine, a selective serotonin reuptake inhibitor, suggesting that the behavioral changes are independent of the serotonergic pathway of Trp metabolism. Instead, BCAA supplementation lowers the brain levels of another Trp-derived metabolite, kynurenic acid, and these levels are normalized by Trp supplementation. We conclude that supplementation of high-energy diets with BCAA causes neurobehavioral impairment. Since BCAA are elevated spontaneously in human obesity, our studies suggest a potential mechanism for explaining the strong association of obesity and mood disorders.
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Affiliation(s)
- Anna Coppola
- Sarah W. Stedman Nutrition and Metabolism Center, Duke University, Durham, NC 27704, USA
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Abstract
Major depression is a serious disorder of enormous sociological and clinical relevance. The discovery of antidepressant drugs in the 1950s led to the first biochemical hypothesis of depression, which suggested that an impairment in central monoaminergic function was the major lesion underlying the disorder. Basic research in all fields of neuroscience (including genetics) and the discovery of new antidepressant drugs have revolutionized our understanding of the mechanisms underlying depression and drug action. There is no doubt that the monoaminergic system is one of the cornerstones of these mechanisms, but multiple interactions with other brain systems and the regulation of central nervous system function must also be taken into account In spite of all the progress achieved so far, we must be aware that many open questions remain to be resolved in the future.
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Affiliation(s)
- Bondy Brigitta
- Psychiatric Clinic of University Munich, Department of Neurochemistry, Munich, Germany
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Affective regulation of cognitive-control adjustments in remitted depressive patients after acute tryptophan depletion. COGNITIVE AFFECTIVE & BEHAVIORAL NEUROSCIENCE 2012; 12:280-6. [PMID: 22218750 PMCID: PMC3341521 DOI: 10.3758/s13415-011-0078-2] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
Abstract
Negative affect in healthy populations regulates the appraisal of demanding situations, which tunes subsequent effort mobilization and adjustments in cognitive control. In the present study, we hypothesized that dysphoria in depressed individuals similarly modulates this adaptation, possibly through a neural mechanism involving serotonergic regulation. We tested the effect of dysphoria induced by acute tryptophan depletion (ATD) in remitted depressed patients on conflict adaptation in a Simon task. ATD temporarily lowers the availability of the serotonin precursor L-Tryptophan and is known to increase depressive symptoms in approximately half of remitted depressed participants. We found that depressive symptoms induced by ATD were associated with increased conflict adaptation. Our finding extends recent observations implying an important role of affect in regulating conflict-driven cognitive control.
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A rodent model of premenstrual dysphoria: progesterone withdrawal induces depression-like behavior that is differentially sensitive to classes of antidepressants. Behav Brain Res 2012; 234:238-47. [PMID: 22789402 DOI: 10.1016/j.bbr.2012.06.034] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2012] [Revised: 06/25/2012] [Accepted: 06/30/2012] [Indexed: 11/20/2022]
Abstract
Premenstrual dysphoric disorder (PMDD) is characterized by a range of physical and affective symptoms including anxiety, irritability, anhedonia, social withdrawal and depression. We demonstrate robust and reproducible depression-like behavior during progesterone withdrawal (PWD) protocols with different methodological variables. Comparable immobility in the forced swim test was evident with different routes of administration (i.e. injections vs. implants), with and without exogenous estrogens in addition to progesterone, and in both single and multiple withdrawal paradigms. Furthermore, withdrawal from physiological doses of progesterone resulted in modest social withdrawal in the social preference test and anhedonia in the saccharin preference test without altering general activity levels or total liquid consumption. However, progesterone withdrawal did not alter serotonin levels in the cortex or hippocampus. Furthermore tryptophan depletion did not augment immobility during PWD. Neither fluoxetine nor duloxetine reduced depression-like behavior during PWD in the forced swim test. In contrast, the tricyclic antidepressant, amitriptyline, was effective in reducing the immobility in forced swim test. These data demonstrate that progesterone withdrawal is a reproducible model of PMDD in several critical behavioral domains. Furthermore, these data do not support alterations in serotonin levels in the etiology of hormonally induced depression.
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Bambico FR, Hattan PR, Garant JP, Gobbi G. Effect of delta-9-tetrahydrocannabinol on behavioral despair and on pre- and postsynaptic serotonergic transmission. Prog Neuropsychopharmacol Biol Psychiatry 2012; 38:88-96. [PMID: 22386778 DOI: 10.1016/j.pnpbp.2012.02.006] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/09/2011] [Revised: 02/02/2012] [Accepted: 02/13/2012] [Indexed: 01/14/2023]
Abstract
Preclinical and clinical studies suggest that direct and indirect cannabinoid agonists, including enhancers of endocannabinoids, engender stress-relieving, anxiolytic and antidepressant effects, mediated by central CB(1) receptors (CB(1)Rs). The effect of the main pharmacologically active principle in cannabis, (-)-trans-Δ(9)-tetrahydrocannabinol (delta-9-THC), on depressive behavior and on the serotonin (5-HT) system, which is implicated in the mechanism of action of antidepressants, has not been extensively clarified. Here, we showed that repeated (5 days), but not single (acute) intraperitoneal (ip) treatment with delta-9-THC (1mg/kg) exerts antidepressant-like properties in the rat forced swim test (FST). This effect was CB(1)R-dependent because it was blocked by the CB(1)R antagonist rimonabant (1mg/kg, ip). Using in vivo electrophysiology, we demonstrated that delta-9-THC modulated dorsal raphe (DR) 5-HT neuronal activity through a CB(1)R-dependent mechanism. Acute intravenous delta-9-THC administration (0.1-1.5mg/kg) elicited a complex response profile, producing excitatory, inhibitory and inert responses of 5-HT neurons. Only excitatory responses were blocked by rimonabant. Finally, repeated but not single delta-9-THC administration (1mg/kg, ip) enhanced tonic 5-HT(1A) receptor activity in the hippocampus, a postsynaptic event commonly elicited by standard antidepressants. These results suggest that delta-9-THC, like other CB(1)R agonists and endocannabinoid enhancers, may possess antidepressant properties at low doses, and could modulate 5-HT transmission in the DR and hippocampus as standard antidepressants such as selective serotonin reuptake inhibitors.
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Alhaj HA, Selman M, Jervis V, Rodgers J, Barton S, McAllister-Williams RH. Effect of low-dose acute tryptophan depletion on the specificity of autobiographical memory in healthy subjects with a family history of depression. Psychopharmacology (Berl) 2012; 222:285-92. [PMID: 22286957 DOI: 10.1007/s00213-012-2644-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/21/2011] [Accepted: 01/08/2012] [Indexed: 10/14/2022]
Abstract
RATIONALE Low-dose acute tryptophan depletion (LD-ATD), while having no effect on mood, has been shown to reduce specificity of autobiographical memory in patients who have recovered from a depressive episode. OBJECTIVES This study aimed to explore if reduced specificity of autobiographical memory with LD-ATD is common to other groups of individuals at risk of depression, specifically a healthy population with a family history of depression. METHODS Nineteen healthy young adults with at least one first-degree relative with a history of major depression were recruited. LD-ATD drinks containing 1.15 g of tryptophan (T+) or no tryptophan (T−) were administered on two separate occasions, in a double blind random order crossover design. The Autobiographical Memory Test (AMT) was administered 5 h after drink administration. RESULTS Analysis of variance revealed a significant difference in the effects of LD-ATD drinks on plasma free tryptophan with no mood change with either drink. There was no within-subject main effect of LD-ATD on the memory task. However, there was a main effect of order of drink. Exploratory analysis of visit 1 data indicated a large between-subject effect (d=1.4) of LD-ATD on AMT with T− associated with less specificity in response to negative cue words (F(1, 17)08.71, p=0.009). CONCLUSIONS Similar to findings following recovery from depression, LD-ATD can reduce specificity of AMT in the absence of lowered mood in healthy individuals with a strong family history of depression. These findings may reflect a 5-HT-dependent cognitive vulnerability to depression in different populations and warrant further research.
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Affiliation(s)
- Hamid A Alhaj
- Institute of Neuroscience, Newcastle University, Newcastle upon Tyne, UK
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Epperson CN, Amin Z, Ruparel K, Gur R, Loughead J. Interactive effects of estrogen and serotonin on brain activation during working memory and affective processing in menopausal women. Psychoneuroendocrinology 2012; 37:372-82. [PMID: 21820247 PMCID: PMC3226892 DOI: 10.1016/j.psyneuen.2011.07.007] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/04/2011] [Revised: 06/15/2011] [Accepted: 07/05/2011] [Indexed: 01/22/2023]
Abstract
While cognitive changes and mood instability are frequent symptoms reported by menopausal women, the degree to which the decline in estrogen production is responsible is not yet clear. Several lines of evidence suggest that estrogen may produce its effects on cognition and mood through modulation of serotonergic function. To test this hypothesis, we used the tryptophan depletion (TD) paradigm to lower central serotonin levels and pharmacologically manipulated estrogen levels in healthy menopausal women. We examined the individual and combined effects of estradiol and serotonin on working memory, emotion processing and task-related brain activation. Eight healthy predominantly early postmenopausal women underwent TD or sham depletion followed by functional magnetic resonance imaging (fMRI) both before and after short-term transdermal estradiol 75-150 μg/d administration. There was an estradiol treatment by TD interaction for brain activation during performance on both the N-back Task (working memory) and Emotion Identification Task (affective processing). During the 2-back condition, TD attenuated activation prior to, but not after, estradiol treatment in the right and left dorsal lateral prefrontal and middle frontal/cingulate gyrus. During emotion identification, TD heightened activation in the orbital frontal cortex and bilateral amygdala, and this effect was attenuated by estradiol treatment. These results provide preliminary evidence that serotonergic effects directly mediate the impact of estrogen on brain activation during working memory and affective processing.
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Increased autoimmune activity against 5-HT: a key component of depression that is associated with inflammation and activation of cell-mediated immunity, and with severity and staging of depression. J Affect Disord 2012; 136:386-92. [PMID: 22166399 DOI: 10.1016/j.jad.2011.11.016] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/02/2011] [Revised: 11/17/2011] [Accepted: 11/17/2011] [Indexed: 12/12/2022]
Abstract
BACKGROUND Depression is characterized by inflammation and cell-mediated immune (CMI) activation and autoimmune reactions directed against a multitude of self-epitopes. There is evidence that the inflammatory response in depression causes dysfunctions in the metabolism of 5-HT, e.g. lowering the 5-HT precursor tryptophan, and upregulating 5-HT receptor mRNA. This study has been undertaken to examine autoimmune activity directed against 5-HT in relation to CMI activation and inflammation. METHODS 5-HT antibodies were examined in major depressed patients (n=109) versus normal controls (n=35) in relation to serum neopterin and lysozyme, and plasma pro-inflammatory cytokines (PIC), i.e. interleukin-1 (IL-1) and tumor necrosis factor-α (TNFα). Severity of depression was assessed with the Hamilton Depression Rating Scale (HDRS) and severity of fatigue and somatic symptoms with the Fibromyalgia and Chronic Fatigue Syndrome (FF) Rating Scale. RESULTS The incidence of anti-5-HT antibody activity was significantly higher in depressed patients (54.1%), and in particular in those with melancholia (82.9%), than in controls (5.7%). Patients with positive 5-HT antibodies showed increased serum neopterin and lysozyme, and plasma TNFα and IL-1; higher scores on the HDRS and FF scales, and more somatic symptoms, including malaise and neurocognitive dysfunctions. There was a significant association between autoimmune activity to 5-HT and the number of previous depressive episodes. DISCUSSION The autoimmune reactions directed against 5-HT might play a role in the pathophysiology of depression and the onset of severe depression. The strong association between autoimmune activity against 5-HT and inflammation/CMI activation is explained by multiple, reciprocal pathways between these factors. Exposure to previous depressive episodes increases the incidence of autoimmune activity directed against 5-HT, which in turn may increase the likelihood to develop new depressive episodes. These findings suggest that sensitization (kindling) and staging of depression are in part based on progressive autoimmune responses.
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Flores-Cruz GM, Escobar A. Reduction of serotonergic neurons in the dorsal raphe due to chronic prenatal administration of a tryptophan-free diet. Int J Dev Neurosci 2012; 30:63-7. [PMID: 22244887 DOI: 10.1016/j.ijdevneu.2012.01.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2011] [Accepted: 01/01/2012] [Indexed: 01/24/2023] Open
Abstract
Serotonin (5-HT) is a widely studied neurotransmitter which plays an important role in the development and proper functioning of the organism throughout life. The appearance of 5-HT system early in ontogeny suggests the hypothesis that 5-HT plays a regulatory role in neurodevelopment. This study investigated the effect of administration of a tryptophan deficient diet during prenatal development on the morphology and cell population of the dorsal raphe. The experimental diet, containing balanced amounts of carbohydrates, lipids and proteins, was provided to a time-mated group of rats from gestational day 5 until delivery. Control groups were fed with (i) the experimental diet formulation with 0.2% tryptophan added to the mixture, or (ii) a regular chow diet. At delivery, five pups per dam were euthanized. Body and brain weight was measured and brain sections were processed for immunohistochemistry for tryptophan hydroxylase (TrpH) and whole brain 5-HT analysis. Sections containing dorsal raphe were photographed with a light microscope and TrpH positive neurons quantified. Brain weights in the tryptophan deprived group showed no difference as compared with controls while body weights were reduced by 25%. Total numbers of serotonergic neurons at the dorsal raphe in the prenatal tryptophan deficient pups were reduced by 35%. A regional analysis of the dorsal raphe indicated a marked cellular reduction in the medial and caudal sections of the nucleus, which contains the majority of serotonergic neurons, in the tryptophan deprived condition. Quantitative 5-HT analysis showed that the brain concentration was similar among conditions. In conclusion, gestational tryptophan deprivation exerts adverse effects on the development of the 5-HT system, particularly in the dorsal raphe, manifested by decreased numbers of serotonergic neurons as well as altered topography in this important nucleus.
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Affiliation(s)
- Guadalupe M Flores-Cruz
- Cellular Biology & Physiology Department, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Mexico.
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Bao AM, Ruhé HG, Gao SF, Swaab DF. Neurotransmitters and neuropeptides in depression. HANDBOOK OF CLINICAL NEUROLOGY 2012; 106:107-36. [PMID: 22608619 DOI: 10.1016/b978-0-444-52002-9.00008-5] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- A-M Bao
- Department of Neurobiology, Zhejiang University School of Medicine, Hangzhou, China.
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Leonard B, Maes M. Mechanistic explanations how cell-mediated immune activation, inflammation and oxidative and nitrosative stress pathways and their sequels and concomitants play a role in the pathophysiology of unipolar depression. Neurosci Biobehav Rev 2011; 36:764-85. [PMID: 22197082 DOI: 10.1016/j.neubiorev.2011.12.005] [Citation(s) in RCA: 595] [Impact Index Per Article: 45.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2011] [Revised: 11/24/2011] [Accepted: 12/10/2011] [Indexed: 12/17/2022]
Abstract
This paper reviews that cell-mediated-immune (CMI) activation and inflammation contribute to depressive symptoms, including anhedonia; anxiety-like behaviors; fatigue and somatic symptoms, e.g. illness behavior or malaise; and mild cognitive impairment (MCI). These effects are in part mediated by increased levels of pro-inflammatory cytokines (PICs), e.g. interleukin-1 (IL-1), IL-6 and tumor necrosis factor (TNF)α, and Th-1-derived cytokines, such as IL-2 and interferon (IFN)γ. Moreover, new pathways, i.e. concomitants and sequels of CMI activation and inflammation, were detected in depression: (1) Induction of indoleamine 2,3-dioxygenase (IDO) by IFNγ and some PICs is associated with depleted plasma tryptophan, which may interfere with brain 5-HT synthesis, and increased production of anxiogenic and depressogenic tryptophan catabolites. (2) Increased bacterial translocation may cause depression-like behaviors by activating the cytokine network, oxidative and nitrosative stress (O&NS) pathways and IDO. (3) Induction of O&NS causes damage to membrane ω3 PUFAs, functional proteins, DNA and mitochondria, and autoimmune responses directed against intracellular molecules that may cause dysfunctions in intracellular signaling. (4) Decreased levels of ω3 PUFAs and antioxidants, such as coenzyme Q10, glutathione peroxidase or zinc, are associated with an increased inflammatory potential; more oxidative damage; the onset of specific symptoms; and changes in the expression or functions of brain 5-HT and N-methyl-d-aspartate receptors. (5) All abovementioned factors cause neuroprogression, that is a combination of neurodegeneration, neuronal apoptosis, and lowered neurogenesis and neuroplasticity. It is concluded that depression may be the consequence of a complex interplay between CMI activation and inflammation and their sequels/concomitants which all together cause neuroprogression that further shapes the depression phenotype. Future research should employ high throughput technologies to collect genetic and gene expression and protein data from patients with depression and analyze these data by means of systems biology methods to define the dynamic interactions between the different cell signaling networks and O&NS pathways that cause depression.
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Affiliation(s)
- Brian Leonard
- Pharmacology Department, National University of Ireland, Galway, Ireland
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Maes M, Leonard BE, Myint AM, Kubera M, Verkerk R. The new '5-HT' hypothesis of depression: cell-mediated immune activation induces indoleamine 2,3-dioxygenase, which leads to lower plasma tryptophan and an increased synthesis of detrimental tryptophan catabolites (TRYCATs), both of which contribute to the onset of depression. Prog Neuropsychopharmacol Biol Psychiatry 2011; 35:702-21. [PMID: 21185346 DOI: 10.1016/j.pnpbp.2010.12.017] [Citation(s) in RCA: 468] [Impact Index Per Article: 36.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/20/2010] [Revised: 12/07/2010] [Accepted: 12/16/2010] [Indexed: 02/07/2023]
Abstract
This paper reviews the body of evidence that not only tryptophan and consequent 5-HT depletion, but also induction of indoleamine 2,3-dioxygenase (IDO) and the detrimental effects of tryptophan catabolites (TRYCATs) play a role in the pathophysiology of depression. IDO is induced by interferon (IFN)γ, interleukin-6 and tumor necrosis factor-α, lipopolysaccharides and oxidative stress, factors that play a role in the pathophysiology of depression. TRYCATs, like kynurenine and quinolinic acid, are depressogenic and anxiogenic; activate oxidative pathways; cause mitochondrial dysfunctions; and have neuroexcitatory and neurotoxic effects that may lead to neurodegeneration. The TRYCAT pathway is also activated following induction of tryptophan 2,3-dioxygenase (TDO) by glucocorticoids, which are elevated in depression. There is evidence that activation of IDO reduces plasma tryptophan and increases TRYCAT synthesis in depressive states and that TDO activation may play a role as well. The development of depressive symptoms during IFNα-based immunotherapy is strongly associated with IDO activation, increased production of detrimental TRYCATs and lowered levels of tryptophan. Women show greater IDO activation and TRYCAT production following immune challenge than men. In the early puerperium, IDO activation and TRYCAT production are associated with the development of affective symptoms. Clinical depression is accompanied by lowered levels of neuroprotective TRYCATs or increased levels or neurotoxic TRYCATs, and lowered plasma tryptophan, which is associated with indices of immune activation and glucocorticoid hypersecretion. Lowered tryptophan and increased TRYCATs induce T cell unresponsiveness and therefore may exert a negative feedback on the primary inflammatory response in depression. It is concluded that activation of the TRYCAT pathway by IDO and TDO may be associated with the development of depressive symptoms through tryptophan depletion and the detrimental effects of TRYCATs. Therefore, the TRYCAT pathway should be a new drug target in depression. Direct inhibitors of IDO are less likely to be useful drugs than agents, such as kynurenine hydroxylase inhibitors; drugs which block the primary immune response; compounds that increase the protective effects of kynurenic acid; and specific antioxidants that target IDO activation, the immune and oxidative pathways, and 5-HT as well.
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Affiliation(s)
- M Maes
- Maes Clinics @ TRIA, Piyavate Hospital, 998 Rimklongsamsen Road, Bangkok 10310, Thailand.
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Dantzer R, O'Connor JC, Lawson MA, Kelley KW. Inflammation-associated depression: from serotonin to kynurenine. Psychoneuroendocrinology 2011; 36:426-36. [PMID: 21041030 PMCID: PMC3053088 DOI: 10.1016/j.psyneuen.2010.09.012] [Citation(s) in RCA: 527] [Impact Index Per Article: 40.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/24/2010] [Revised: 08/21/2010] [Accepted: 09/29/2010] [Indexed: 01/28/2023]
Abstract
In the field of depression, inflammation-associated depression stands up as an exception since its causal factors are obvious and it is easy to mimic in an animal model. In addition, quasi-experimental studies can be carried out in patients who are treated chronically with recombinant cytokines for a medical condition since these patients can be studied longitudinally before, during and after stimulation of the immune system. These clinical studies have revealed that depression is a late phenomenon that develops over a background of early appearing sickness. Incorporation of this feature in animal models of inflammation-associated depression has allowed the demonstration that alterations of brain serotoninergic neurotransmission do not play a major role in the pathogenesis. This is in contrast to the activation of the tryptophan degrading enzyme indoleamine 2,3-dioxygenase that generates potentially neurotoxic kynurenine metabolites such as 3-hydroxy kynurenine and quinolinic acid. Although the relative importance of peripherally versus centrally produced kynurenine and the cellular source of production of this compound remain to be determined, these findings provide new targets for the treatment of inflammation-associated depression that could be extended to other psychiatric conditions mediated by activation of neuroimmune mechanisms.
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Affiliation(s)
- Robert Dantzer
- Integrative Immunology and Behavior Program, Department of Animal Sciences, 227 Edward R. Madigan Laboratory, 1201 West Gregory Drive, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.
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van der Plasse G, Feenstra MGP. WITHDRAWN: Is acute tryptophan depletion a valid method to assess central serotonergic function? Neurosci Biobehav Rev 2011:S0149-7634(11)00053-4. [PMID: 21435352 DOI: 10.1016/j.neubiorev.2011.03.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2010] [Revised: 02/16/2011] [Accepted: 03/15/2011] [Indexed: 10/18/2022]
Abstract
This article has been withdrawn at the request of the editor. The Publisher apologizes for any inconvenience this may cause. The full Elsevier Policy on Article Withdrawal can be found at http://www.elsevier.com/locate/withdrawalpolicy.
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Affiliation(s)
- Geoffrey van der Plasse
- Rudolf Magnus Institute of Neuroscience, University Medical Center Utrecht, Department of Psychiatry, PO Box 85500, 3508 GAUtrecht,The Netherlands
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Time series fMRI measures detect changes in pontine raphé following acute tryptophan depletion. Psychiatry Res 2011; 191:112-21. [PMID: 21236648 PMCID: PMC3042244 DOI: 10.1016/j.pscychresns.2010.10.007] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/26/2010] [Revised: 09/16/2010] [Accepted: 10/25/2010] [Indexed: 11/23/2022]
Abstract
Serotonin is synthesized from its precursor, tryptophan, by brainstem raphé neurons and their synaptic terminals in limbic regions. The omission of tryptophan from an Acute Tryptophan Depletion (ATD) diet transiently diminishes serotonin synthesis, alters raphé activity, and mimics symptoms of depression. Raphé functional magnetic resonance imaging (fMRI) poses challenges using signal-averaging analyses. Time-series properties of fMRI blood oxygenation level dependent (BOLD) signals may hold promise, so we analyzed raphé signals for changes with the ATD diet. Eleven remitted (previously depressed) patients were awake with eyes-closed during seven-minute resting scans with 0.5s(-1) sampling. BOLD signal time-series data were frequency-filtered using wavelet transforms, yielding three octave-width frequency bands from 0.25 to 0.03s(-1) and an unbounded band below 0.03s(-1). Spectral power, reflecting signal information, increased in pontine raphé at high frequencies (0.25 to 0.125s(-1)) during ATD (compared to control, balanced, diet, P<0.004) but was unchanged at other frequencies. Functional connectivity, the correlation between time-series data from pairs of regions, weakened between pontine raphé and anterior thalamus at low frequencies during ATD (P<0.05). This preliminarily supports using fMRI time-series features to assess pontine raphé function. Whether, and how, high frequency activity oscillations interfere with low frequency signaling requires further study.
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Zhou J, Chen Q, Wang LL, Wang YH, Fu YZ. Chiral Discrimination of Tryptophan Enantiomers via (1R, 2R)-2-Amino-1, 2-Diphenyl Ethanol Modified Interface. INTERNATIONAL JOURNAL OF ELECTROCHEMISTRY 2011. [DOI: 10.4061/2011/502364] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The paper reported that a simple chiral selective interface constructed by (1R, 2R)-2-amino-1, 2-diphenyl ethanol had been developed to discriminate tryptophan enantiomers. Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) were used for the characteristic analysis of the electrode. The results indicated that the interface showed stable and sensitive property to determine the tryptophan enantiomers. Moreover, it exhibited the better stereoselectivity for L-tryptophan than that for D-tryptophan. The discrimination characteristics of the chiral selective interface for discriminating tryptophan enantiomers, including the response time, the effect of tryptophan enantiomers concentration, and the stability, were investigated in detail. In addition, the chiral selective interface was used to determine the enantiomeric composition of L- and D-tryptophan enantiomer mixtures by measuring the relative change of the peak current as well as in pure enantiomeric solutions. These results suggested that the chiral selective interface has the potential for enantiomeric discrimination of tryptophan enantiomers.
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Affiliation(s)
- Juan Zhou
- Key Laboratory on Luminescence and Real-Time Analysis of Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Qiao Chen
- Key Laboratory on Luminescence and Real-Time Analysis of Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Li-lan Wang
- Key Laboratory on Luminescence and Real-Time Analysis of Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Yong-hua Wang
- Key Laboratory on Luminescence and Real-Time Analysis of Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Ying-zi Fu
- Key Laboratory on Luminescence and Real-Time Analysis of Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
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Van der Does W. Thought suppression and cognitive vulnerability to depression. BRITISH JOURNAL OF CLINICAL PSYCHOLOGY 2010; 44:1-14. [PMID: 15826340 DOI: 10.1348/014466504x19442] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVES Cognitive reactivity (CR) has been defined as the relative ease with which maladaptive cognitions or cognitive styles are triggered by mild (nonpathological) mood fluctuations. CR has been found to predict relapse of depression (Segal, Gemar and Williams, 1999). This study compared different measures of CR, and also investigated the role of thought suppression as a possible mechanism underlying CR. DESIGN AND METHODS Participants included 24 previously depressed, and 24 never depressed individuals who underwent a mood induction. They also completed a questionnaire designed to measure CR (LEIDS; Van der Does, 2002a), and participated in the scrambled sentences task (SST). The SST was designed to uncover thought suppression tendencies, and has been shown to discriminate between never depressed and previously depressed samples. RESULTS LEIDS scores were higher for previously depressed than for never depressed individuals. However, CR as measured with the mood induction did not distinguish between these groups. The LEIDS was correlated with the results of the SST and with self-report measures of thought suppression. CONCLUSION Active suppression of unwanted thoughts may be involved in the apparent inactive state of depressive cognitions during remission.
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Measuring serotonin synthesis: from conventional methods to PET tracers and their (pre)clinical implications. Eur J Nucl Med Mol Imaging 2010; 38:576-91. [PMID: 21113591 PMCID: PMC3034914 DOI: 10.1007/s00259-010-1663-2] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2010] [Accepted: 11/01/2010] [Indexed: 12/20/2022]
Abstract
The serotonergic system of the brain is complex, with an extensive innervation pattern covering all brain regions and endowed with at least 15 different receptors (each with their particular distribution patterns), specific reuptake mechanisms and synthetic processes. Many aspects of the functioning of the serotonergic system are still unclear, partially because of the difficulty of measuring physiological processes in the living brain. In this review we give an overview of the conventional methods of measuring serotonin synthesis and methods using positron emission tomography (PET) tracers, more specifically with respect to serotonergic function in affective disorders. Conventional methods are invasive and do not directly measure synthesis rates. Although they may give insight into turnover rates, a more direct measurement may be preferred. PET is a noninvasive technique which can trace metabolic processes, like serotonin synthesis. Tracers developed for this purpose are α-[11C]methyltryptophan ([11C]AMT) and 5-hydroxy-L-[β-11C]tryptophan ([11C]5-HTP). Both tracers have advantages and disadvantages. [11C]AMT can enter the kynurenine pathway under inflammatory conditions (and thus provide a false signal), but this tracer has been used in many studies leading to novel insights regarding antidepressant action. [11C]5-HTP is difficult to produce, but trapping of this compound may better represent serotonin synthesis. AMT and 5-HTP kinetics are differently affected by tryptophan depletion and changes of mood. This may indicate that both tracers are associated with different enzymatic processes. In conclusion, PET with radiolabelled substrates for the serotonergic pathway is the only direct way to detect changes of serotonin synthesis in the living brain.
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Popova NK, Kulikov AV. Targeting tryptophan hydroxylase 2 in affective disorder. Expert Opin Ther Targets 2010; 14:1259-71. [DOI: 10.1517/14728222.2010.524208] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Kriegebaum C, Song NN, Gutknecht L, Huang Y, Schmitt A, Reif A, Ding YQ, Lesch KP. Brain-specific conditional and time-specific inducible Tph2 knockout mice possess normal serotonergic gene expression in the absence of serotonin during adult life. Neurochem Int 2010; 57:512-7. [PMID: 20599453 DOI: 10.1016/j.neuint.2010.06.015] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2010] [Revised: 06/25/2010] [Accepted: 06/28/2010] [Indexed: 10/19/2022]
Abstract
Several lines of evidence implicate a dysregulation of tryptophan hydroxylase (TPH)-dependent serotonin (5-HT) synthesis in emotional behaviour and stress, and point to its relevance for the etiology and pathogenesis of various neuropsychiatric disorders. We therefore studied different animal models featuring reduced Tph2 expression to investigate the consequences of impaired brain 5-HT synthesis on neuronal development. Specifically, brain-specific conditional and time-specific inducible Tph2 knockout (KO) models were generated and investigated for altered serotonergic neuron-specific gene expression. Raphe neurons of a brain-specific constitutive Tph2 KO were completely devoid of Tph2-positive neurons and, consequently, 5-HT in the brain, and also displayed no compensatory up-regulation of Tph1 expression. In contrast, an inducible Tph2 KO mouse facilitates the generation of a brain-specific 5-HT-reduction model selectively during adult life. This resulted in a highly reduced number of Tph2-positive cells and thus 5-HT in the brain. Intriguingly, expression studies detected no alteration in the expression of genes relevant to the 5-HT system in the brain-specific Tph2 KO and the 5-HT-reduction models. These findings confirm the specificity of Tph2 in brain 5-HT synthesis across the lifespan, yet also suggest that neither developmental nor adult 5-HT synthesis is required for the expression of genes specific for serotonergic signalling. The formation of the serotonergic system thus seems to be a preserved expressional pattern due to intrinsic cellular programs which occurs also in the absence of its key molecule, namely 5-HT.
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Affiliation(s)
- Claudia Kriegebaum
- Molecular Psychiatry, Department of Psychiatry, Psychosomatics and Psychotherapy, Julius-Maximilians University of Würzburg, Würzburg, Germany
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