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Xiong LL, Xue LL, Chen YJ, Du RL, Wang Q, Wen S, Zhou L, Liu T, Wang TH, Yu CY. Proteomics Study on the Cerebrospinal Fluid of Patients with Encephalitis. ACS OMEGA 2021; 6:16288-16296. [PMID: 34235299 PMCID: PMC8246475 DOI: 10.1021/acsomega.1c00367] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Accepted: 05/28/2021] [Indexed: 02/08/2023]
Abstract
OBJECTIVE Label-free quantitative proteomics was applied to analyze differentially expressed proteins (DEPs) in the cerebrospinal fluid (CSF) of patients with encephalitis. The database was used to screen for possible biomarkers in encephalitis, followed by validation and preliminary investigation of the role of some DEPs in the pathogenesis of encephalitis using enzyme-linked immunosorbent assay (ELISA). METHODS We performed label-free quantitative proteomics on 16 cerebrospinal fluid samples (EM group, encephalitis with mental and behavioral disorders patients, n = 5; NED group, encephalitis without mental and behavioral disorders patients, n = 6; N group, healthy individuals, n = 5). The extracted CSF proteins were examined by mass spectrometry and enzymatic digestion and detected using protein profiling and data analysis. Interproscan was used to perform Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment analysis of the DEPs. ELISA was used to verify the changes in the levels of some DEPs in the CSF. RESULTS A total of 941 proteins were found to be significantly differentially expressed, including 250 upregulated DEPs and 691 downregulated DEPs. GO analysis suggested that there were six enriched functions that intersect among the EM, NED, and N groups, including synapse organization, membrane, integral component of membrane, membrane part, G-protein-coupled receptor signaling pathway, and transmembrane signaling receptor activity. KEGG analysis revealed that there were three signaling pathways that intersect among the EM, NED, and N groups, including fructose and mannose metabolism, inositol phosphate metabolism, and Jak-STAT signaling pathway. Furthermore, four downregulated encephalitis-related neurological synapse proteins were identified after screening for differentially expressed proteins, including NRXN3, NFASC, LRRC4B, and NLGN2. The result of ELISA further verified that the expression of NLGN2 and LRRC4B was obviously higher in the NED group than in the N group. CONCLUSIONS These findings demonstrated that NLGN2 and LRRC4B proteins were upregulated in the NED group and could be potential biomarkers for the diagnosis of encephalitis, but still needs a lot of multiomics studies to be used in clinical.
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Affiliation(s)
- Liu-Lin Xiong
- Department of Anesthesiology, Affiliated Hospital of Zunyi Medical University, No. 149 Dalian Road, Huichuan
District, Guizhou 550000, China
| | - Lu-Lu Xue
- Institute of Neuroscience, Kunming Medical University, Kunming 650031, China
| | - Yan-Jun Chen
- Institute of Neurological Disease, West China Hospital, Sichuan University, No. 88 Keyuan South Road, Chengdu 610041, Sichuan, China
| | - Ruo-Lan Du
- Institute of Neurological Disease, West China Hospital, Sichuan University, No. 88 Keyuan South Road, Chengdu 610041, Sichuan, China
| | - Qian Wang
- Department of Neurology, Affiliated Hospital of Zunyi Medical University, No. 149 Dalian Road, Huichuan District, Guizhou 550000, China
| | - Song Wen
- Department of Anesthesiology, Affiliated Hospital of Zunyi Medical University, No. 149 Dalian Road, Huichuan
District, Guizhou 550000, China
| | - Lin Zhou
- Department of Anesthesiology, Affiliated Hospital of Zunyi Medical University, No. 149 Dalian Road, Huichuan
District, Guizhou 550000, China
| | - Tao Liu
- Department of Neurology, Affiliated Hospital of Zunyi Medical University, No. 149 Dalian Road, Huichuan District, Guizhou 550000, China
| | - Ting-Hua Wang
- Institute of Neurological Disease, West China Hospital, Sichuan University, No. 88 Keyuan South Road, Chengdu 610041, Sichuan, China
| | - Chang-Yin Yu
- Department of Neurology, Affiliated Hospital of Zunyi Medical University, No. 149 Dalian Road, Huichuan District, Guizhou 550000, China
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Mariano DO, Prezotto-Neto JP, Spencer PJ, Sciani JM, Pimenta DC. Proteomic analysis of soluble proteins retrieved from Duttaphrynus melanostictus skin secretion by IEx-batch sample preparation. J Proteomics 2019; 209:103525. [DOI: 10.1016/j.jprot.2019.103525] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Revised: 08/15/2019] [Accepted: 09/12/2019] [Indexed: 12/18/2022]
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Quintero M, Stanisic D, Cruz G, Pontes JGM, Costa TBBC, Tasic L. Metabolomic Biomarkers in Mental Disorders: Bipolar Disorder and Schizophrenia. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019; 1118:271-293. [PMID: 30747428 DOI: 10.1007/978-3-030-05542-4_14] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Psychiatric disorders are some of the most impairing human diseases. Among them, bipolar disorder and schizophrenia are the most common. Both have complicated diagnostics due to their phenotypic, biological, and genetic heterogeneity, unknown etiology, and the underlying biological pathways, and molecular mechanisms are still not completely understood. Given the multifactorial complexity of these disorders, identification and implementation of metabolic biomarkers would assist in their early detection and diagnosis and facilitate disease monitoring and treatment responses. To date, numerous studies have utilized metabolomics to better understand psychiatric disorders, and findings from these studies have begun to converge. In this chapter, we briefly describe some of the metabolomic biomarkers found in these two disorders.
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Affiliation(s)
- Melissa Quintero
- Laboratory of Chemical Biology, Department of Organic Chemistry, Institute of Chemistry, University of Campinas (UNICAMP), Campinas, São Paulo, Brazil
| | - Danijela Stanisic
- Laboratory of Chemical Biology, Department of Organic Chemistry, Institute of Chemistry, University of Campinas (UNICAMP), Campinas, São Paulo, Brazil
| | - Guilherme Cruz
- Laboratory of Chemical Biology, Department of Organic Chemistry, Institute of Chemistry, University of Campinas (UNICAMP), Campinas, São Paulo, Brazil
| | - João G M Pontes
- Laboratory of Microbial Chemical Biology, Institute of Chemistry, University of Campinas (UNICAMP), Campinas, São Paulo, Brazil
| | - Tássia Brena Barroso Carneiro Costa
- Laboratory of Chemical Biology, Department of Organic Chemistry, Institute of Chemistry, University of Campinas (UNICAMP), Campinas, São Paulo, Brazil
| | - Ljubica Tasic
- Laboratory of Chemical Biology, Department of Organic Chemistry, Institute of Chemistry, University of Campinas (UNICAMP), Campinas, São Paulo, Brazil.
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Kurita M, Mashiko H, Rai M, Kumasaka T, Kouno SI, Niwa SI, Nakahata N. Lithium chloride at a therapeutic concentration reduces Ca2+ response in protein kinase C down-regulated human astrocytoma cells. Eur J Pharmacol 2002; 442:17-22. [PMID: 12020677 DOI: 10.1016/s0014-2999(02)01491-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Since the therapeutic efficacy of Li+ in the treatment of mood disorder is observed only after chronic administration, we examined whether long-term Li+ treatment with a therapeutic concentration affected the elevation of intracellular-free Ca2+ concentration ([Ca2+]i) induced by carbachol, a muscarinic receptor agonist, in 1321N1 human astrocytoma cells. Carbachol caused [Ca2+]i elevation through phosphoinositide hydrolysis in a concentration-dependent manner. Treatment of the cells with phorbol 12-myristate 13-acetate (PMA), a protein kinase C activator, for 2 min resulted in a reduction of the carbachol-induced [Ca2+]i elevation. However, PMA did not reduce the carbachol-induced [Ca2+]i elevation in cells treated with PMA for 48 h, reflecting the down-regulation of protein kinase C. Although Li+ at a therapeutic concentration (1 mM) did not affect the carbachol-induced [Ca2+]i elevation in normal cells, it potently inhibited the [Ca2+]i elevation in protein kinase C down-regulated cells. This inhibitory action of Li+ was observed in a concentration- and time-dependent manner. When protein kinase C activity was directly determined, Li+ treatment did not restore protein kinase C activity in protein kinase C down-regulated cells. [3H]Quinuclidinyl benzylate, a muscarinic receptor ligand, bound to membranes derived from normal and protein kinase C down-regulated cells with a similar Kd and Bmax, and Li+ did not affect these parameters of [3H]quinuclidinyl benzylate binding. These results indicated that Li+ at a therapeutic concentration reduced the muscarinic receptor-mediated increased in [Ca2+]i under the protein kinase C-deficient condition without affecting muscarinic receptor or protein kinase C activity.
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Affiliation(s)
- Masatake Kurita
- Department of Neuropsychiatry, School of Medicine, Fukushima Medical University, Hikarigaoka 1, Fukushima, Japan
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Mehta DV, Kabir A, Bhat PJ. Expression of human inositol monophosphatase suppresses galactose toxicity in Saccharomyces cerevisiae: possible implications in galactosemia. BIOCHIMICA ET BIOPHYSICA ACTA 1999; 1454:217-26. [PMID: 10452956 DOI: 10.1016/s0925-4439(99)00037-x] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
A suppressor of galactose toxicity in a gal7 yeast strain (lacking galactose 1-phosphate uridyl transferase) has been isolated from a HeLa cell cDNA library. Analysis of the plasmid clone indicated that the insert has an ORF identical to that of hIMPase (human myo-inositol monophosphatase). The ability of hIMPase to suppress galactose toxicity is sensitive to the presence of Li(+) in the medium. A gal7 yeast strain harboring a plasmid containing cloned hIMPase grows on galactose as a sole carbon source. hIMPase mediated galactose metabolism is dependent on the functionality of GAL1 as well as GAL10 encoded galactokinase and epimerase respectively. These results predicted that the UDP-glucose/galactose pyrophosphorylase mediated pathway may be responsible for the relief of galactose toxicity. Experiments conducted to test this prediction revealed that expression of UGP1 encoded UDP-glucose pyrophosphorylase can indeed overcome the relief of galactose toxicity. Moreover, expression of UGP1 allows a gal7 strain to grow on galactose as a sole carbon source. Unlike the hIMPase mediated relief of galactose toxicity, UGP1 mediated relief of galactose toxicity is lithium insensitive. Based on our results and on the basis of available information on galactose toxicity, we suggest an alternative explanation for the molecular mechanism of galactose toxicity.
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Affiliation(s)
- D V Mehta
- Laboratory of Molecular Genetics, Biotechnology Centre, Indian Institute of Technology, Powai, Mumbai 400 076, India
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Atack JR, Levine J, Belmaker RH. Cerebrospinal fluid inositol monophosphatase: elevated activity in depression and neuroleptic-treated schizophrenia. Biol Psychiatry 1998; 44:433-7. [PMID: 9777174 DOI: 10.1016/s0006-3223(98)00065-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
BACKGROUND Inositol monophosphatase (IMPase) is a key enzyme in the regulation of the activity of the phosphatidyl inositol (PI) signaling pathway. This enzyme is also found in the cerebrospinal fluid (CSF), where it may prove useful as a marker of dysfunctional PI signal transduction. METHODS IMPase activity was measured in lumbar CSF of depressed and neuroleptic-treated schizophrenic patients. In addition, and to gain an insight into the factors that influence the levels of CSF IMPase, enzyme activity was measured in subgroups of schizophrenic patients treated for 3-7 days with lithium or 7 days with inositol. RESULTS CSF IMPase activity was significantly increased by 88% in depressed and by 172% in schizophrenic patients relative to control subjects. Lithium produced a marked increase in CSF IMPase activity in the group as a whole, and this group effect could be more specifically attributed to 3 of the 8 individuals in whom enzyme activity increased by over 300%. On the other hand, inositol had no effect on CSF IMPase activity. CONCLUSIONS In the absence of a clear relationship between CSF IMPase activity and neuronal PI signaling pathways it is not possible to correlate these changes with altered neuronal function. Nevertheless, increased CSF IMPase activity in depression and schizophrenia may be a marker of the pathophysiological processes underlying these disorders. Moreover, the large lithium-induced increase in IMPase activity seen in a subgroup of schizophrenic subjects suggests a differential regulation of CSF enzyme activity in these patients.
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Affiliation(s)
- J R Atack
- Merck Sharp & Dohme Research Laboratories, Neuroscience Research Centre, Harlow, Essex, United Kingdom
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Atack JR, Broughton HB, Pollack SJ. Inositol monophosphatase--a putative target for Li+ in the treatment of bipolar disorder. Trends Neurosci 1995; 18:343-9. [PMID: 7482796 DOI: 10.1016/0166-2236(95)93926-o] [Citation(s) in RCA: 84] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Attenuation of the phosphatidylinositol (PI) signal transduction pathway as a consequence of inhibition of inositol monophosphatase (IMPase) has been proposed as the mechanism for the efficacy of Li+ in the treatment of bipolar disorder. Nevertheless, Li+ also affects other aspects of PI signal transduction, and it is therefore not clear whether modulation of PI responses by Li+ can be attributed solely to inhibition of IMPase. However, inhibitors of IMPase mimic the effects of Li+ on some aspects of PI cell signalling, thus highlighting the potential of IMPase as a target for the treatment of bipolar disorder. The recent description of the three-dimensional structure of IMPase in conjunction with site-directed mutagenesis and kinetic studies has led to the elucidation of the enzyme mechanism. These structural and mechanistic data should prove useful in the development of novel inhibitors of IMPase that might ultimately prove useful clinically.
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Affiliation(s)
- J R Atack
- Merck Sharp & Dohme Research Laboratories, Harlow, Essex, UK
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