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Røgenes H, Finne K, Winge I, Akslen LA, Östman A, Milosevic V. Development of 42 marker panel for in-depth study of cancer associated fibroblast niches in breast cancer using imaging mass cytometry. Front Immunol 2024; 15:1325191. [PMID: 38711512 PMCID: PMC11070582 DOI: 10.3389/fimmu.2024.1325191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Accepted: 04/05/2024] [Indexed: 05/08/2024] Open
Abstract
Imaging Mass Cytometry (IMC) is a novel, and formidable high multiplexing imaging method emerging as a promising tool for in-depth studying of tissue architecture and intercellular communications. Several studies have reported various IMC antibody panels mainly focused on studying the immunological landscape of the tumor microenvironment (TME). With this paper, we wanted to address cancer associated fibroblasts (CAFs), a component of the TME very often underrepresented and not emphasized enough in present IMC studies. Therefore, we focused on the development of a comprehensive IMC panel that can be used for a thorough description of the CAF composition of breast cancer TME and for an in-depth study of different CAF niches in relation to both immune and breast cancer cell communication. We established and validated a 42 marker panel using a variety of control tissues and rigorous quantification methods. The final panel contained 6 CAF-associated markers (aSMA, FAP, PDGFRa, PDGFRb, YAP1, pSMAD2). Breast cancer tissues (4 cases of luminal, 5 cases of triple negative breast cancer) and a modified CELESTA pipeline were used to demonstrate the utility of our IMC panel for detailed profiling of different CAF, immune and cancer cell phenotypes.
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Affiliation(s)
- Hanna Røgenes
- Centre for Cancer Biomarkers CCBIO, Department of Clinical Medicine, University of Bergen, Bergen, Norway
| | - Kenneth Finne
- Centre for Cancer Biomarkers CCBIO, Department of Clinical Medicine, University of Bergen, Bergen, Norway
| | - Ingeborg Winge
- Centre for Cancer Biomarkers CCBIO, Department of Clinical Medicine, University of Bergen, Bergen, Norway
| | - Lars A. Akslen
- Centre for Cancer Biomarkers CCBIO, Department of Clinical Medicine, University of Bergen, Bergen, Norway
- Department of Pathology, Haukeland University Hospital, Bergen, Norway
| | - Arne Östman
- Centre for Cancer Biomarkers CCBIO, Department of Clinical Medicine, University of Bergen, Bergen, Norway
- Department of Oncology and Pathology, Karolinska Institutet, Solna, Sweden
| | - Vladan Milosevic
- Centre for Cancer Biomarkers CCBIO, Department of Clinical Medicine, University of Bergen, Bergen, Norway
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Kjølle S, Finne K, Birkeland E, Ardawatia V, Winge I, Aziz S, Knutsvik G, Wik E, Paulo JA, Vethe H, Kleftogiannis D, Akslen LA. Hypoxia induced responses are reflected in the stromal proteome of breast cancer. Nat Commun 2023; 14:3724. [PMID: 37349288 PMCID: PMC10287711 DOI: 10.1038/s41467-023-39287-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Accepted: 06/07/2023] [Indexed: 06/24/2023] Open
Abstract
Cancers are often associated with hypoxia and metabolic reprogramming, resulting in enhanced tumor progression. Here, we aim to study breast cancer hypoxia responses, focusing on secreted proteins from low-grade (luminal-like) and high-grade (basal-like) cell lines before and after hypoxia. We examine the overlap between proteomics data from secretome analysis and laser microdissected human breast cancer stroma, and we identify a 33-protein stromal-based hypoxia profile (33P) capturing differences between luminal-like and basal-like tumors. The 33P signature is associated with metabolic differences and other adaptations following hypoxia. We observe that mRNA values for 33P predict patient survival independently of molecular subtypes and basic prognostic factors, also among low-grade luminal-like tumors. We find a significant prognostic interaction between 33P and radiation therapy.
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Affiliation(s)
- Silje Kjølle
- Centre for Cancer Biomarkers CCBIO, Department of Clinical Medicine, Section for Pathology, University of Bergen, Bergen, N-5021, Norway
| | - Kenneth Finne
- Centre for Cancer Biomarkers CCBIO, Department of Clinical Medicine, Section for Pathology, University of Bergen, Bergen, N-5021, Norway
| | - Even Birkeland
- Centre for Cancer Biomarkers CCBIO, Department of Clinical Medicine, Section for Pathology, University of Bergen, Bergen, N-5021, Norway
| | - Vandana Ardawatia
- Centre for Cancer Biomarkers CCBIO, Department of Clinical Medicine, Section for Pathology, University of Bergen, Bergen, N-5021, Norway
| | - Ingeborg Winge
- Centre for Cancer Biomarkers CCBIO, Department of Clinical Medicine, Section for Pathology, University of Bergen, Bergen, N-5021, Norway
| | - Sura Aziz
- Centre for Cancer Biomarkers CCBIO, Department of Clinical Medicine, Section for Pathology, University of Bergen, Bergen, N-5021, Norway
- Department of Pathology, Haukeland University Hospital, Bergen, N-5021, Norway
| | - Gøril Knutsvik
- Centre for Cancer Biomarkers CCBIO, Department of Clinical Medicine, Section for Pathology, University of Bergen, Bergen, N-5021, Norway
- Department of Pathology, Haukeland University Hospital, Bergen, N-5021, Norway
| | - Elisabeth Wik
- Centre for Cancer Biomarkers CCBIO, Department of Clinical Medicine, Section for Pathology, University of Bergen, Bergen, N-5021, Norway
- Department of Pathology, Haukeland University Hospital, Bergen, N-5021, Norway
| | - Joao A Paulo
- Department of Cell Biology, Harvard Medical School, Boston, MA, USA
| | - Heidrun Vethe
- Centre for Cancer Biomarkers CCBIO, Department of Clinical Medicine, Section for Pathology, University of Bergen, Bergen, N-5021, Norway
| | - Dimitrios Kleftogiannis
- Centre for Cancer Biomarkers CCBIO, Department of Clinical Medicine, Section for Pathology, University of Bergen, Bergen, N-5021, Norway
- Department of Informatics, Computational Biology Unit, University of Bergen, Bergen, Norway
| | - Lars A Akslen
- Centre for Cancer Biomarkers CCBIO, Department of Clinical Medicine, Section for Pathology, University of Bergen, Bergen, N-5021, Norway.
- Department of Pathology, Haukeland University Hospital, Bergen, N-5021, Norway.
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Milosevic V, Edelmann RJ, Winge I, Strell C, Mezheyeuski A, Knutsvik G, Askeland C, Wik E, Akslen LA, Östman A. Vessel size as a marker of survival in estrogen receptor positive breast cancer. Breast Cancer Res Treat 2023:10.1007/s10549-023-06974-4. [PMID: 37222874 DOI: 10.1007/s10549-023-06974-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Accepted: 05/03/2023] [Indexed: 05/25/2023]
Abstract
PURPOSE Angiogenesis is crucial for tumor growth and is one of the hallmarks of cancer. In this study, we analyzed microvessel density, vessel median size, and perivascular a-SMA expression as prognostic biomarkers in breast cancer. METHODS Dual IHC staining was performed where alpha-SMA antibodies were used together with antibodies against the endothelial cell marker CD34. Digital images of stainings were analyzed to extract quantitative data on vessel density, vessel size, and perivascular alpha-SMA status. RESULTS The analyses in the discovery cohort (n = 108) revealed a statistically significant relationship between large vessel size and shorter disease-specific survival (p = 0.007, log-rank test; p = 0.01, HR 3.1; 95% CI 1.3-7.4, Cox-regression analyses). Subset analyses indicated that the survival association of vessel size was strengthened in ER + breast cancer. To consolidate these findings, additional analyses were performed on a validation cohort (n = 267) where an association between large vessel size and reduced survival was also detected in ER + breast cancer (p = 0.016, log-rank test; p = 0.02; HR 2.3, 95% CI 1.1-4.7, Cox-regression analyses). CONCLUSION Alpha-SMA/CD34 dual-IHC staining revealed breast cancer heterogeneity regarding vessel size, vessel density, and perivascular a-SMA status. Large vessel size was linked to shorter survival in ER + breast cancer.
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Affiliation(s)
- Vladan Milosevic
- Centre for Cancer Biomarkers CCBIO, Department of Clinical Medicine, University of Bergen, Bergen, Norway.
| | - Reidunn J Edelmann
- Centre for Cancer Biomarkers CCBIO, Department of Clinical Medicine, University of Bergen, Bergen, Norway
- Department of Pathology, Haukeland University Hospital, Bergen, Norway
| | - Ingeborg Winge
- Centre for Cancer Biomarkers CCBIO, Department of Clinical Medicine, University of Bergen, Bergen, Norway
| | - Carina Strell
- Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden
| | - Artur Mezheyeuski
- Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden
| | - Gøril Knutsvik
- Centre for Cancer Biomarkers CCBIO, Department of Clinical Medicine, University of Bergen, Bergen, Norway
- Department of Pathology, Haukeland University Hospital, Bergen, Norway
| | - Cecilie Askeland
- Centre for Cancer Biomarkers CCBIO, Department of Clinical Medicine, University of Bergen, Bergen, Norway
- Department of Pathology, Haukeland University Hospital, Bergen, Norway
| | - Elisabeth Wik
- Centre for Cancer Biomarkers CCBIO, Department of Clinical Medicine, University of Bergen, Bergen, Norway
- Department of Pathology, Haukeland University Hospital, Bergen, Norway
| | - Lars A Akslen
- Centre for Cancer Biomarkers CCBIO, Department of Clinical Medicine, University of Bergen, Bergen, Norway
- Department of Pathology, Haukeland University Hospital, Bergen, Norway
| | - Arne Östman
- Centre for Cancer Biomarkers CCBIO, Department of Clinical Medicine, University of Bergen, Bergen, Norway
- Department of Oncology and Pathology, Karolinska Institutet, Solna, Sweden
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Bjørnstad OV, Carrasco M, Finne K, Winge I, Askeland C, Arnes JB, Knutsvik G, Kleftogiannis D, Paulo JA, Akslen LA, Vethe H. Global and single-cell proteomics view of the co-evolution between neural progenitors and breast cancer cells in a co-culture model. bioRxiv 2023:2023.05.03.539050. [PMID: 37205344 PMCID: PMC10187147 DOI: 10.1101/2023.05.03.539050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Tumor neurogenesis, a process by which new nerves invade tumors, is a growing area of interest in cancer research. Nerve presence has been linked to aggressive features of various solid tumors, including breast and prostate cancer. A recent study suggested that the tumor microenvironment may influence cancer progression through recruitment of neural progenitor cells from the central nervous system. However, the presence of neural progenitors in human breast tumors has not been reported. Here, we investigate the presence of Doublecortin (DCX) and Neurofilament-Light (NFL) co-expressing (DCX+/NFL+) cells in patient breast cancer tissue using Imaging Mass Cytometry. To map the interaction between breast cancer cells and neural progenitor cells further, we created an in vitro model mimicking breast cancer innervation, and characterized using mass spectrometry-based proteomics on the two cell types as they co- evolved in co-culture. Our results indicate stromal presence of DCX+/NFL+ cells in breast tumor tissue from a cohort of 107 patient cases, and that neural interaction contribute to drive a more aggressive breast cancer phenotype in our co-culture models. Our results support that neural involvement plays an active role in breast cancer and warrants further studies on the interaction between nervous system and breast cancer progression.
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Mahootchi E, Cannon Homaei S, Kleppe R, Winge I, Hegvik TA, Megias-Perez R, Totland C, Mogavero F, Baumann A, Glennon JC, Miletic H, Kursula P, Haavik J. GADL1 is a multifunctional decarboxylase with tissue-specific roles in β-alanine and carnosine production. Sci Adv 2020; 6:eabb3713. [PMID: 32733999 PMCID: PMC7367687 DOI: 10.1126/sciadv.abb3713] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Accepted: 06/05/2020] [Indexed: 05/26/2023]
Abstract
Carnosine and related β-alanine-containing peptides are believed to be important antioxidants, pH buffers, and neuromodulators. However, their biosynthetic routes and therapeutic potential are still being debated. This study describes the first animal model lacking the enzyme glutamic acid decarboxylase-like 1 (GADL1). We show that Gadl1-/- mice are deficient in β-alanine, carnosine, and anserine, particularly in the olfactory bulb, cerebral cortex, and skeletal muscle. Gadl1-/- mice also exhibited decreased anxiety, increased levels of oxidative stress markers, alterations in energy and lipid metabolism, and age-related changes. Examination of the GADL1 active site indicated that the enzyme may have multiple physiological substrates, including aspartate and cysteine sulfinic acid. Human genetic studies show strong associations of the GADL1 locus with plasma levels of carnosine, subjective well-being, and muscle strength. Together, this shows the multifaceted and organ-specific roles of carnosine peptides and establishes Gadl1 knockout mice as a versatile model to explore carnosine biology and its therapeutic potential.
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Affiliation(s)
| | - Selina Cannon Homaei
- Department of Biomedicine, University of Bergen, Bergen, Norway
- Division of Psychiatry, Haukeland University Hospital, Bergen, Norway
| | - Rune Kleppe
- Division of Psychiatry, Haukeland University Hospital, Bergen, Norway
| | - Ingeborg Winge
- Department of Biomedicine, University of Bergen, Bergen, Norway
| | - Tor-Arne Hegvik
- Department of Biomedicine, University of Bergen, Bergen, Norway
| | | | - Christian Totland
- Department of Chemistry, University of Bergen, Bergen, Norway
- Norwegian Geotechnical Institute, Oslo, Norway
| | - Floriana Mogavero
- Department of Cognitive Neuroscience, Donders Institute for Brain Cognition and Behavior, Radboud University Medical Center, Nijmegen, Netherlands
| | - Anne Baumann
- Department of Biomedicine, University of Bergen, Bergen, Norway
| | - Jeffrey Colm Glennon
- Department of Cognitive Neuroscience, Donders Institute for Brain Cognition and Behavior, Radboud University Medical Center, Nijmegen, Netherlands
- Conway Institute of Biomolecular and Biomedical Research, School of Medicine, University College Dublin, Belfield, Dublin 4, Ireland
| | - Hrvoje Miletic
- Department of Biomedicine, University of Bergen, Bergen, Norway
- Department of Pathology, Haukeland University Hospital, Bergen, Norway
| | - Petri Kursula
- Department of Biomedicine, University of Bergen, Bergen, Norway
- Faculty of Biochemistry and Molecular Medicine, University of Oulu, Oulu, Finland
| | - Jan Haavik
- Department of Biomedicine, University of Bergen, Bergen, Norway
- Division of Psychiatry, Haukeland University Hospital, Bergen, Norway
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Raasakka A, Mahootchi E, Winge I, Luan W, Kursula P, Haavik J. Structure of the mouse acidic amino acid decarboxylase GADL1. Acta Crystallogr F Struct Biol Commun 2018; 74:65-73. [PMID: 29372909 PMCID: PMC5947694 DOI: 10.1107/s2053230x17017848] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2017] [Accepted: 12/13/2017] [Indexed: 01/01/2023] Open
Abstract
Pyridoxal 5'-phosphate (PLP) is a ubiquitous cofactor in various enzyme classes, including PLP-dependent decarboxylases. A recently discovered member of this class is glutamic acid decarboxylase-like protein 1 (GADL1), which lacks the activity to decarboxylate glutamate to γ-aminobutyrate, despite its homology to glutamic acid decarboxylase. Among the acidic amino acid decarboxylases, GADL1 is most similar to cysteine sulfinic acid decarboxylase (CSAD), but the physiological function of GADL1 is unclear, although its expression pattern and activity suggest a role in neurotransmitter and neuroprotectant metabolism. The crystal structure of mouse GADL1 is described, together with a solution model based on small-angle X-ray scattering data. While the overall fold and the conformation of the bound PLP are similar to those in other PLP-dependent decarboxylases, GADL1 adopts a more loose conformation in solution, which might have functional relevance in ligand binding and catalysis. The structural data raise new questions about the compactness, flexibility and conformational dynamics of PLP-dependent decarboxylases, including GADL1.
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Affiliation(s)
- Arne Raasakka
- Department of Biomedicine, University of Bergen, Jonas Lies Vei 91, 5009 Bergen, Norway
| | - Elaheh Mahootchi
- Department of Biomedicine, University of Bergen, Jonas Lies Vei 91, 5009 Bergen, Norway
- K. G. Jebsen Centre for Research on Neuropsychiatric Disorders, University of Bergen, Jonas Lies Vei 91, 5009 Bergen, Norway
| | - Ingeborg Winge
- Department of Biomedicine, University of Bergen, Jonas Lies Vei 91, 5009 Bergen, Norway
- K. G. Jebsen Centre for Research on Neuropsychiatric Disorders, University of Bergen, Jonas Lies Vei 91, 5009 Bergen, Norway
| | - Weisha Luan
- Faculty of Biochemistry and Molecular Medicine, University of Oulu, PO Box 5400, 90014 Oulu, Finland
| | - Petri Kursula
- Department of Biomedicine, University of Bergen, Jonas Lies Vei 91, 5009 Bergen, Norway
- Faculty of Biochemistry and Molecular Medicine, University of Oulu, PO Box 5400, 90014 Oulu, Finland
| | - Jan Haavik
- Department of Biomedicine, University of Bergen, Jonas Lies Vei 91, 5009 Bergen, Norway
- K. G. Jebsen Centre for Research on Neuropsychiatric Disorders, University of Bergen, Jonas Lies Vei 91, 5009 Bergen, Norway
- Division of Psychiatry, Haukeland University Hospital, Bergen, Norway
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Winge I, Teigen K, Fossbakk A, Mahootchi E, Kleppe R, Sköldberg F, Kämpe O, Haavik J. Mammalian CSAD and GADL1 have distinct biochemical properties and patterns of brain expression. Neurochem Int 2015; 90:173-84. [PMID: 26327310 DOI: 10.1016/j.neuint.2015.08.013] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2015] [Revised: 07/30/2015] [Accepted: 08/22/2015] [Indexed: 11/17/2022]
Abstract
Variants in the gene encoding the enzyme glutamic acid decarboxylase like 1 (GADL1) have been associated with response to lithium therapy. Both GADL1 and the related enzyme cysteine sulfinic acid decarboxylase (CSAD) have been proposed to be involved in the pyridoxal-5'-phosphate (PLP)-dependent biosynthesis of taurine. In the present study, we compared the catalytic properties, inhibitor sensitivity and expression profiles of GADL1 and CSAD in brain tissue. In mouse and human brain we observed distinct patterns of expression of the PLP-dependent decarboxylases CSAD, GADL1 and glutamic acid decarboxylase 67 (GAD67). CSAD levels were highest during prenatal and early postnatal development; GADL1 peaked early in prenatal development, while GAD67 increased rapidly after birth. Both CSAD and GADL1 are being expressed in neurons, whereas only CSAD mRNA was detected in astrocytes. Cysteine sulfinic acid was the preferred substrate for both mouse CSAD and GADL1, although both enzymes also decarboxylated cysteic acid and aspartate. In silico screening and molecular docking using the crystal structure of CSAD and in vitro assays led to the discovery of eight new enzyme inhibitors with partial selectivity for either CSAD or GADL1. Lithium had minimal effect on their enzyme activities. In conclusion, taurine biosynthesis in vertebrates involves two structurally related PLP-dependent decarboxylases (CSAD and GADL1) that have partially overlapping catalytic properties but different tissue distribution, indicating divergent physiological roles. Development of selective enzyme inhibitors targeting these enzymes is important to further dissect their (patho)physiological roles.
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Affiliation(s)
- Ingeborg Winge
- K.G. Jebsen Centre for Research on Neuropsychiatric Disorders, Department of Biomedicine, University of Bergen, Norway
| | - Knut Teigen
- K.G. Jebsen Centre for Research on Neuropsychiatric Disorders, Department of Biomedicine, University of Bergen, Norway
| | - Agnete Fossbakk
- K.G. Jebsen Centre for Research on Neuropsychiatric Disorders, Department of Biomedicine, University of Bergen, Norway
| | - Elaheh Mahootchi
- K.G. Jebsen Centre for Research on Neuropsychiatric Disorders, Department of Biomedicine, University of Bergen, Norway
| | - Rune Kleppe
- K.G. Jebsen Centre for Research on Neuropsychiatric Disorders, Department of Biomedicine, University of Bergen, Norway
| | - Filip Sköldberg
- Department of Medical Sciences, University Hospital, Uppsala University, Uppsala, Sweden
| | - Olle Kämpe
- Department of Medical Sciences, University Hospital, Uppsala University, Uppsala, Sweden; Centre of Molecular Medicine (CMM L8:01), Dept. of Medicine (Solna), Karolinska Instituttet, Stockholm, Sweden
| | - Jan Haavik
- K.G. Jebsen Centre for Research on Neuropsychiatric Disorders, Department of Biomedicine, University of Bergen, Norway; Division of Psychiatry, Haukeland University Hospital, Bergen, Norway.
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Halmoy A, Johansson S, Winge I, McKinney JA, Knappskog PM, Haavik J. Attention-Deficit/Hyperactivity Disorder Symptoms in Offspring of Mothers With Impaired Serotonin Production. ACTA ACUST UNITED AC 2010; 67:1033-43. [DOI: 10.1001/archgenpsychiatry.2010.124] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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Calvo AC, Scherer T, Pey AL, Ying M, Winge I, McKinney J, Haavik J, Thöny B, Martinez A. Effect of pharmacological chaperones on brain tyrosine hydroxylase and tryptophan hydroxylase 2. J Neurochem 2010; 114:853-63. [DOI: 10.1111/j.1471-4159.2010.06821.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Abstract
Tryptophan hydroxylase 2 (TPH2) catalyzes the rate-limiting step in serotonin biosynthesis in the nervous system. Several variants of human TPH2 have been reported to be associated with a spectrum of neuropsychiatric disorders such as unipolar major depression, bipolar disorder, suicidality, and attention-deficit/hyperactivity disorder (ADHD). We used three different expression systems: rabbit reticulocyte lysate, Escherichia coli, and human embryonic kidney cells, to identify functional effects of all human TPH2 missense variants reported to date. The properties of mutants affecting the regulatory domain, that is, p.Leu36Val, p.Leu36Pro, p.Ser41Tyr, and p.Arg55Cys, were indistinguishable from the wild-type (WT). Moderate loss-of-function effects were observed for mutants in the catalytic and oligomerization domains, that is, p.Pro206Ser, p.Ala328Val, p.Arg441His, and p.Asp479Glu, which were manifested via stability and solubility effects, whereas p.Arg303Trp had severely reduced solubility and was completely inactive. All variants were tested as substrates for protein kinase A and were found to have similar phosphorylation stoichiometries. A standardized assay protocol as described here for activity and solubility screening should also be useful for determining properties of other TPH2 variants that will be discovered in the future.
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McKinney J, Johansson S, Halmøy A, Dramsdahl M, Winge I, Knappskog PM, Haavik J. A loss-of-function mutation in tryptophan hydroxylase 2 segregating with attention-deficit/hyperactivity disorder. Mol Psychiatry 2008; 13:365-7. [PMID: 18347598 DOI: 10.1038/sj.mp.4002152] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Cichon S, Winge I, Mattheisen M, Georgi A, Karpushova A, Freudenberg J, Freudenberg-Hua Y, Babadjanova G, Van Den Bogaert A, Abramova LI, Kapiletti S, Knappskog PM, McKinney J, Maier W, Jamra RA, Schulze TG, Schumacher J, Propping P, Rietschel M, Haavik J, Nöthen MM. Brain-specific tryptophan hydroxylase 2 (TPH2): a functional Pro206Ser substitution and variation in the 5'-region are associated with bipolar affective disorder. Hum Mol Genet 2007; 17:87-97. [PMID: 17905754 DOI: 10.1093/hmg/ddm286] [Citation(s) in RCA: 100] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The neurotransmitter serotonin [5-hydroxytryptamine (5-HT)] controls a broad range of biological functions that are disturbed in affective disorder. In the brain, 5-HT production is controlled by tryptophan hydroxylase 2 (TPH2). In order to assess the possible contribution of TPH2 genetic variability to the aetiology of bipolar affective disorder (BPAD), we systematically investigated common and rare genetic variation in the TPH2 gene through a sequential sequencing and SNP-based genotyping approach. Our study sample comprised two cohorts of BPAD from Germany and Russia, totalling 883 patients and 1300 controls. SNPs located in a haplotype block covering the 5' region of the gene as well as a rare, non-synonymous SNP, resulting in a Pro206Ser substitution, showed significant association with bipolar disorder. The odds ratio for the minor allele in the pooled sample was 1.5 (95% CI 1.2-1.9) for rs11178997 (in the 5'-associated haplotype block) and 4.8 (95% CI 1.6-14.8) for rs17110563 encoding the Pro206Ser substitution. Examination of the functional effects of TPH2 Pro206Ser provided evidence for a reduced thermal stability and solubility of the mutated enzyme, suggesting reduced 5-HT production in the brain as a pathophysiological mechanism in BPAD.
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Affiliation(s)
- Sven Cichon
- Department of Genomics, Life and Brain Center, University of Bonn, Bonn, Germany.
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Abstract
Tryptophan hydroxylase (TPH) catalyses the rate-limiting step in the biosynthesis of serotonin. In vertebrates, the homologous genes tph1 and tph2 encode two different enzymes with distinct patterns of expression, enzyme kinetics and regulation. Variants of TPH2 have recently reported to be associated with reduced serotonin production and behavioural alterations in man and mice. We have produced the human forms of these enzymes in Esherichia coli and in human embryonic kidney cell lines (HEK293) and examined the effects of mutations on their heterologous expression levels, solubility, thermal stability, secondary structure, and catalytic properties. Pure human TPH2 P449R (corresponds to mouse P447R) had comparable catalytic activity (V(max)) and solubility relative to the wild type, but had decreased thermal stability; whereas human TPH2 R441H had decreased activity, solubility and stability. Thus, we consider the variations in kinetic values between wild-type and TPH2 mutants to be of secondary importance to their effects on protein stability and solubility. These findings provide potential molecular explanations for disorders related to the central serotonergic system, such as depression or suicidal behaviour.
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Affiliation(s)
- Ingeborg Winge
- Department of Biomedicine, Section of Biochemistry and Molecular Biology, University of Bergen, Norway
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Winge I, Pryme IF. Sodium butyrate stimulates the synthesis of firefly luciferase in transfected CHO cells but levels of BiP chaperone are unaffected. Cell Biol Int 2003; 26:489-94. [PMID: 12119175 DOI: 10.1006/cbir.2002.0881] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A stably transfected CHO cell line (LUCLEAD) was used where the coding region of native Firefly luciferase was linked to the 3'-UTR of the bovine growth hormone, and the 5'-nucleotides coding for the albumin signal peptide were linked to the N-terminal end of the luciferase coding region. Incubation of cells with 1 or 2 mM sodium butyrate (SB) for 72 h had no effect on cell growth since cultures reached confluency at the same time as control cells. Although cell cultures incubated with SB at a concentration of 4 mM were only about 60% confluent the luciferase content was about 5-fold higher than that in control cells. Cells incubated with either 1 or 2 mM SB showed intermediate levels of luciferase content. The amount of the chaperone BiP in the cells was not affected by incubation with SB. The results indicate that SB can be used to effectively promote synthesis of recombinant luciferase.
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Affiliation(s)
- Ingeborg Winge
- Department of Biochemistry and Molecular Biology, University of Bergen, Arstadveien 19, NO-5009 Bergen, Norway
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Sánchez-Piris M, Posas F, Alemany V, Winge I, Hidalgo E, Bachs O, Aligue R. The serine/threonine kinase Cmk2 is required for oxidative stress response in fission yeast. J Biol Chem 2002; 277:17722-7. [PMID: 11886858 DOI: 10.1074/jbc.m200104200] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Cmk2, a fission yeast Ser/Thr protein kinase homologous to mammalian calmodulin kinases, is essential for oxidative stress response. Cells lacking cmk2 gene were specifically sensitive to oxidative stress conditions. Upon stress, Cmk2 was phosphorylated in vivo, and this phosphorylation was dependent on the stress-activated MAPK Sty1/Spc1. Co-precipitation assays demonstrated that Cmk2 binds Sty1. Furthermore, in vivo or in vitro activated Sty1 was able to phosphorylate Cmk2, and the phosphorylation occurred at the C-terminal regulatory domain at Thr-411. Cell lethality caused by overexpression of Wis1 MAPK kinase was abolished by deletion of cmk2 or by mutation of Thr-411 of Cmk2. Taken together, our data suggest that Cmk2 acts downstream of Sty1 and is an essential kinase for oxidative stress responses.
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Affiliation(s)
- Maribel Sánchez-Piris
- Department of Cell Biology, Institut de Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Universitat de Barcelona, E-08036 Barcelona, Spain
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