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Differential Serotonin Uptake Mechanisms at the Human Maternal-Fetal Interface. Int J Mol Sci 2021; 22:ijms22157807. [PMID: 34360573 PMCID: PMC8346107 DOI: 10.3390/ijms22157807] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 07/16/2021] [Accepted: 07/18/2021] [Indexed: 12/30/2022] Open
Abstract
Serotonin (5-HT) plays an extensive role during pregnancy in regulating both the placental physiology and embryonic/fetal development. The uptake of 5-HT into cells is central to the control of local concentrations of 5-HT near its molecular targets. Here, we investigated the mechanisms of 5-HT uptake into human primary placental cells and cord blood platelets, all isolated immediately after birth. Trophoblasts and cord blood platelets showed 5-HT uptake with similar Michaelis constant (Km) values (~0.6 μM), typical of the high-affinity serotonin transporter (SERT). The uptake of 5-HT into trophoblasts was efficiently inhibited by various SERT-targeting drugs. In contrast, the uptake of 5-HT into feto-placental endothelial cells was not inhibited by a SERT blocker and showed a Km value (~782 μM) in the low-affinity range. Consistent with this, SERT mRNAs were abundant in term trophoblasts but sparse in feto-placental endothelial cells, whereas the opposite was found for the low-affinity plasma membrane monoamine transporter (PMAT) mRNAs. Organic cation transporter (OCT) 1, 2, and 3 mRNAs were absent or sparse in both cell types. In summary, the results demonstrate, for the first time, the presence of functional 5-HT uptake systems in feto-placental endothelial cells and fetal platelets, cells that are in direct contact with fetal blood plasma. The data also highlight the sensitivity to various psychotropic drugs of 5-HT transport into trophoblasts facing the maternal blood. The multiple, high-, and low-affinity systems present for the cellular uptake of 5-HT underscore the importance of 5-HT homeostasis at the maternal-fetal interface.
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Peitl V, Getaldić-Švarc B, Karlović D. Platelet Serotonin Concentration Is Associated with Illness Duration in Schizophrenia and Chronological Age in Depression. Psychiatry Investig 2020; 17:579-586. [PMID: 32492767 PMCID: PMC7324732 DOI: 10.30773/pi.2020.0033] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Accepted: 03/16/2020] [Indexed: 12/18/2022] Open
Abstract
OBJECTIVE Impaired serotonergic neurotransmission has been implicated in the pathogenesis of depression and schizophrenia. Blood platelets have been used for years as a peripheral model of neuronal serotonin dynamics. The objective was to investigate platelet count and serotonin concentration in patients with depression and schizophrenia, in an attempt to ascertain their clinical usefulness. METHODS 953 participants were included in the study, 329 patients with depression, 339 patients with schizophrenia and 285 healthy controls. ELISA was used to assess platelet serotonin concentrations. RESULTS There were no statistically significant differences among groups regarding age, total platelet count and serotonin concentration. Linear regression analyses revealed inverse correlations between platelet serotonin concentration and age of patients with depression and healthy individuals, as well as between platelet serotonin concentration and illness duration in patients with schizophrenia. In other words, longer illness duration in patients with schizophrenia, and higher age in patients with depression and healthy individuals was associated with lower platelet serotonin concentrations. CONCLUSION Platelet count and serotonin concentration did not prove to be of diagnostic value in differentiating patients and healthy individuals. However, illness duration in patients with schizophrenia may be associated with reduced concentrations of platelet serotonin.
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Affiliation(s)
- Vjekoslav Peitl
- Department of Psychiatry, University Hospital Center Sestre Milosrdnice, Zagreb, Croatia.,Croatia and Catholic University of Croatia, Zagreb, Croatia
| | - Biserka Getaldić-Švarc
- Clinical Department of Chemistry, University Hospital Center Sestre Milosrdnice, Zagreb, Croatia
| | - Dalibor Karlović
- Croatia and University of Zagreb School of Dental Medicine, Zagreb, Croatia
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Araos P, Vidal R, O'Shea E, Pedraz M, García-Marchena N, Serrano A, Suárez J, Castilla-Ortega E, Ruiz JJ, Campos-Cloute R, Santín LJ, Rodríguez de Fonseca F, Pavón FJ, Colado MI. Serotonin is the main tryptophan metabolite associated with psychiatric comorbidity in abstinent cocaine-addicted patients. Sci Rep 2019; 9:16842. [PMID: 31727978 PMCID: PMC6856167 DOI: 10.1038/s41598-019-53312-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Accepted: 10/26/2019] [Indexed: 11/09/2022] Open
Abstract
The lack of effective treatments and a high rate of relapse in cocaine addiction constitute a major health problem. The present study was conducted to examine the expression of tryptophan-derived metabolites in the context of cocaine addiction and psychiatric comorbidity, which is common in addicted subjects. Abstinent patients with cocaine use disorder (CUD) and control subjects were recruited for a cross-sectional study. Participants were assessed with a semi-structured diagnostic interview (PRISM) based on DSM-IV-TR for substance and mental disorders. Plasma concentrations of tryptophan metabolites and their association with relevant CUD-related variables and psychiatric comorbidity were explored. We observed decreased plasma kynurenic acid concentrations in the cocaine group, however no associations between CUD-related variables and tryptophan-derived metabolites were found. In contrast, 5-HT concentrations were increased in CUD-patients and the diagnosis of different psychiatric disorders in the cocaine group was related to higher plasma 5-HT concentrations compared with non-comorbid patients. Therefore, while changes in plasma kynurenic acid concentrations appear to be directly associated with lifetime CUD, changes in 5-HT concentrations are associated with psychiatric comorbidity. These results emphasize the need to find potential biomarkers for a better stratification of cocaine-addicted patients in order to develop therapeutic approaches to prevent cocaine relapse.
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Affiliation(s)
- Pedro Araos
- Unidad Gestión Clínica de Salud Mental, Instituto de Investigación Biomédica de Málaga (IBIMA), Hospital Regional Universitario de Málaga, Universidad de Málaga, Málaga, Spain.,Departamento de Psicobiología y Metodología de las Ciencias del Comportamiento. Facultad de Psicología, Universidad de Málaga (UMA), Málaga, Spain
| | - Rebeca Vidal
- Departamento Farmacología y Toxicología, Facultad de Medicina, Universidad Complutense, Madrid, Spain
| | - Esther O'Shea
- Departamento Farmacología y Toxicología, Facultad de Medicina, Universidad Complutense, Madrid, Spain
| | - María Pedraz
- Unidad Gestión Clínica de Salud Mental, Instituto de Investigación Biomédica de Málaga (IBIMA), Hospital Regional Universitario de Málaga, Universidad de Málaga, Málaga, Spain
| | - Nuria García-Marchena
- Unidad Gestión Clínica de Salud Mental, Instituto de Investigación Biomédica de Málaga (IBIMA), Hospital Regional Universitario de Málaga, Universidad de Málaga, Málaga, Spain
| | - Antonia Serrano
- Unidad Gestión Clínica de Salud Mental, Instituto de Investigación Biomédica de Málaga (IBIMA), Hospital Regional Universitario de Málaga, Universidad de Málaga, Málaga, Spain
| | - Juan Suárez
- Unidad Gestión Clínica de Salud Mental, Instituto de Investigación Biomédica de Málaga (IBIMA), Hospital Regional Universitario de Málaga, Universidad de Málaga, Málaga, Spain
| | - Estela Castilla-Ortega
- Unidad Gestión Clínica de Salud Mental, Instituto de Investigación Biomédica de Málaga (IBIMA), Hospital Regional Universitario de Málaga, Universidad de Málaga, Málaga, Spain.,Departamento de Psicobiología y Metodología de las Ciencias del Comportamiento. Facultad de Psicología, Universidad de Málaga (UMA), Málaga, Spain
| | | | | | - Luis J Santín
- Departamento de Psicobiología y Metodología de las Ciencias del Comportamiento. Facultad de Psicología, Universidad de Málaga (UMA), Málaga, Spain
| | - Fernando Rodríguez de Fonseca
- Unidad Gestión Clínica de Salud Mental, Instituto de Investigación Biomédica de Málaga (IBIMA), Hospital Regional Universitario de Málaga, Universidad de Málaga, Málaga, Spain
| | - Francisco Javier Pavón
- Unidad Gestión Clínica de Salud Mental, Instituto de Investigación Biomédica de Málaga (IBIMA), Hospital Regional Universitario de Málaga, Universidad de Málaga, Málaga, Spain.
| | - María Isabel Colado
- Departamento Farmacología y Toxicología, Facultad de Medicina, Universidad Complutense, Madrid, Spain.
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Liu C, Lai Y, Ouyang J, Yang T, Guo Y, Yang J, Huang S. Influence of nonylphenol and octylphenol exposure on 5-HT, 5-HT transporter, and 5-HT 2A receptor. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:8279-8286. [PMID: 28160177 DOI: 10.1007/s11356-017-8487-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Accepted: 01/19/2017] [Indexed: 05/20/2023]
Abstract
Nonylphenol (NP) and octylphenol (OP) are priority environmental contaminants that have a potential role as endocrine disruptors. They can be biomagnified in the food chain and pose an estrogenic health risk to human health. A 28-day oral toxicity study was performed to observe the impact of single and combined exposure to NP and OP on 5-HT transporter (SERT) as well as 5-HT2A receptor. Results showed that the 5-HT levels in rat plasma increased with exposure to middle-dose and high-dose NP, to high-dose OP, and to low, middle, and high doses of combined NP and OP (P < 0.05), while the 5-HT levels in rat platelets increased when exposed to NP/OP or combined NP and OP of middle or high dose (P < 0.05). The expression levels of SERT in rat platelets decreased when exposed to high-dose NP/OP or high dose of combined NP and OP (P < 0.05). Meanwhile, the expression levels of 5-HT2A in rat platelets decreased when exposed to high-dose NP/OP as well as combined NP and OP (P < 0.05). These findings suggested that exposure to NP and OP could influence the metabolic network of 5-hydroxytryptamine via transportation and receptor binding pathways.
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Affiliation(s)
- Chunhong Liu
- College of Food Science, South China Agricultural University, Guangzhou, 510642, China.
- Guangdong Provincial Key Laboratory of Food Quality and Safety, South China Agricultural University, Guangzhou, 510642, China.
- Laboratory of Quality and Safety Risk Assessment to Post-Harvested Product Storage, Ministry of Agriculture, Guangzhou, 510642, China.
| | - Yuting Lai
- College of Food Science, South China Agricultural University, Guangzhou, 510642, China
| | - Junyan Ouyang
- College of Food Science, South China Agricultural University, Guangzhou, 510642, China
| | - Tongwang Yang
- College of Food Science, South China Agricultural University, Guangzhou, 510642, China
| | - Youting Guo
- College of Food Science, South China Agricultural University, Guangzhou, 510642, China
| | - Jie Yang
- College of Food Science, South China Agricultural University, Guangzhou, 510642, China
| | - Shaowen Huang
- College of Food Science, South China Agricultural University, Guangzhou, 510642, China
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Increased risk of cardiovascular disease in premenopausal female ragpickers of Eastern India: involvement of inflammation, oxidative stress, and platelet hyperactivity. Mol Cell Biochem 2016; 419:193-203. [PMID: 27421852 DOI: 10.1007/s11010-016-2773-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2016] [Accepted: 07/09/2016] [Indexed: 12/18/2022]
Abstract
Millions of poor people in the developing world still thrive on ragpicking. In the present study, we have examined whether ragpicking is associated with increased risk of cardiovascular disease. For this, we have enrolled 112 premenopausal female ragpickers (median age 30 years) and 98 age-matched housemaids as control from Kolkata, Eastern India. Venous blood was drawn for routine hematology; flow cytometry was used to measure generation of reactive oxygen species (ROS) by leukocytes, surface expression of CD62P (P-selectin) in platelets and CD11b in leukocytes. Collagen-induced platelet aggregation was evaluated by aggregometer, and erythrocytic superoxide dismutase (SOD) was measured by spectrophotometry. Soluble P-selectin (sP-sel) and CD40L (sCD40L), neutrophil-activating protein-2 (NAP-2), platelet and plasma serotonin, oxidized low-density lipoprotein (oxLDL), and anticardiolipin antibodies (aCL) in plasma were measured by ELISA. Compared with control, the ragpickers had significantly higher prevalence of hypertension and prehypertension, and hypertension was positively associated with ragpicking. The ragpickers also had higher levels of inflammation (elevated NAP-2), oxidative stress (elevated ROS generation with depleted SOD) with oxLDL, platelet activation and aggregability, soluble CD40 ligand, with altered serotonin level (rose in plasma but depleted in platelet). A greater percentage of ragpickers had elevated serum level of aCL of the IgG and IgM isotypes than the controls. The results suggest that the occupation of ragpicking increases the risk of cardiovascular diseases in premenopausal women of Eastern India via inflammation, oxidative stress, platelet hyperactivity, and hypertension.
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Peitl V, Vidrih B, Karlović Z, Getaldić B, Peitl M, Karlović D. Platelet serotonin concentration and depressive symptoms in patients with schizophrenia. Psychiatry Res 2016; 239:105-10. [PMID: 27137969 DOI: 10.1016/j.psychres.2016.03.006] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/17/2015] [Revised: 01/26/2016] [Accepted: 03/02/2016] [Indexed: 10/22/2022]
Abstract
Depressive symptoms seem to be frequent in schizophrenia, but so far they have received less attention than other symptom domains. Impaired serotonergic neurotransmission has been implicated in the pathogenesis of depression and schizophrenia. The objectives of this study were to investigate platelet serotonin concentrations in schizophrenic patients with and without depressive symptoms, and to investigate the association between platelet serotonin concentrations and symptoms of schizophrenia, mostly depressive symptoms. A total of 364 patients were included in the study, 237 of which had significant depressive symptoms. Significant depressive symptoms were defined by the cut-off score of 7 or more on Calgary Depression Rating Scale (CDSS). Platelet serotonin concentrations were assessed by the enzyme-linked immunosorbent assay (ELISA). Prevalence of depression in patients with schizophrenia was 65.1%. Schizophrenic patients with depressive symptoms showed lower platelet serotonin concentrations (mean±SD; 490.6±401.2) compared to schizophrenic patients without depressive symptoms (mean±SD; 660.9±471.5). An inverse correlation was established between platelet serotonin concentration and depressive symptoms, with more severe symptoms being associated with lower platelet serotonin concentrations. Depressive symptoms in schizophrenic patients may be associated with reduced concentrations of platelet serotonin.
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Affiliation(s)
- Vjekoslav Peitl
- Department of Psychiatry, University Hospital Centre Sestre Milosrdnice, Zagreb, Croatia; Croatian Catholic University, Zagreb, Croatia
| | - Branka Vidrih
- Department of Psychiatry, University Hospital Centre Sestre Milosrdnice, Zagreb, Croatia; Croatian Catholic University, Zagreb, Croatia
| | - Zoran Karlović
- Department of Psychiatry, University Hospital Centre Sestre Milosrdnice, Zagreb, Croatia
| | - Biserka Getaldić
- Department of Psychiatry, University Hospital Centre Sestre Milosrdnice, Zagreb, Croatia
| | - Milena Peitl
- Department of Psychiatry, University Hospital Centre Sestre Milosrdnice, Zagreb, Croatia
| | - Dalibor Karlović
- Department of Psychiatry, University Hospital Centre Sestre Milosrdnice, Zagreb, Croatia; Croatian Catholic University, Zagreb, Croatia.
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Amaral WZ, Lubach GR, Bennett AJ, Coe CL. Inflammatory vulnerability associated with the rh5-HTTLPR genotype in juvenile rhesus monkeys. GENES BRAIN AND BEHAVIOR 2013; 12:353-60. [PMID: 23331374 DOI: 10.1111/gbb.12023] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2012] [Revised: 12/07/2012] [Accepted: 01/15/2013] [Indexed: 12/19/2022]
Abstract
Individual variation in serotonergic function is associated with reactivity, risk for affective disorders, as well as an altered response to disease. Our study used a nonhuman primate model to further investigate whether a functional polymorphism in the promoter region for the serotonin transporter gene helps to explain differences in proinflammatory responses. Homology between the human and rhesus monkey polymorphisms provided the opportunity to determine how this genetic variation influences the relationship between a psychosocial stressor and immune responsiveness. Leukocyte numbers in blood and interleukin-6 (IL-6) responses are sensitive to stressful challenges and are indicative of immune status. The neutrophil-to-lymphocyte ratio and cellular IL-6 responses to in vitro lipopolysaccharide stimulation were assessed in 27 juvenile male rhesus monkeys while housed in stable social groups (NLL = 16, NS = 11) and also in 18 animals after relocation to novel housing (NLL = 13, NS = 5). Short allele monkeys had significantly higher neutrophil-to-lymphocyte ratios than homozygous Long allele carriers at baseline [t(25) = 2.18, P = 0.02], indicative of an aroused state even in the absence of disturbance. In addition, following the housing manipulation, IL-6 responses were more inhibited in short allele carriers (F1,16 = 8.59, P = 0.01). The findings confirm that the serotonin transporter gene-linked polymorphism is a distinctive marker of reactivity and inflammatory bias, perhaps in a more consistent manner in monkeys than found in many human studies.
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Affiliation(s)
- W Z Amaral
- Harlow Center for Biological Psychology, University of Wisconsin-Madison, Madison, WI 53715, USA.
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Platelet serotonin in primary Sjögren's syndrome: level and relation with disease activity. J Neuroimmunol 2012; 251:87-9. [PMID: 22819441 DOI: 10.1016/j.jneuroim.2012.06.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2012] [Revised: 06/26/2012] [Accepted: 06/29/2012] [Indexed: 11/21/2022]
Abstract
Primary Sjögren's syndrome (pSS) is chronic autoimmune disorder of unknown ethiopathogenesis. In line with the concept of neuroimmunohormonal dysregulation in inflammatory rheumatic diseases, the aim of this study was to investigate platelet serotonin level (PSL) in patients with pSS and its relation with the activity and duration of the disease. Significantly lower PSL in pSS patients (N=61) was shown as compared to healthy controls (N=103). No correlation was found between PSL and the actual disease activity assessed by the recently developed EULAR Sjögren's Syndrome Disease Activity Index (ESSDAI). Results suggest involvement of the serotonin system in the pathogenesis of pSS.
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