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Neuman V, Vavra D, Drnkova L, Pruhova S, Plachy L, Kolouskova S, Obermannova B, Amaratunga SA, Konecna P, Vyzralkova J, Venhacova P, Pomahacova R, Paterova P, Stichova L, Skvor J, Kocourkova K, Romanova M, Vosahlo J, Strnadel J, Polockova K, Neumann D, Slavenko M, Sumnik Z. Introduction of continuous glucose monitoring (CGM) is a key factor in decreasing HbA1c in war refugee children with type 1 diabetes. Diabetes Res Clin Pract 2024; 208:111118. [PMID: 38309536 DOI: 10.1016/j.diabres.2024.111118] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Revised: 01/16/2024] [Accepted: 01/22/2024] [Indexed: 02/05/2024]
Abstract
AIMS Our aim was to describe the changes in therapy and diabetes control in Ukrainian war refugee children with diabetes (CwD) during the first year of their stay in Czechia. METHODS A total of 124 CwD (62 male, 62 female) were enrolled into this observational study. Anthropometric, laboratory and diabetes management data were acquired at baseline and at 3 months intervals for 12 months. All CwD were offered a CGM device during their first visit. Generalized Estimating Equation models were fitted in order to estimate the dynamics of studied characteristics. RESULTS Median baseline HbA1c was 58 mmol/mol (IQR [48; 73]mmol/mol) (7.5 %, IQR[6.5;8.8]%). The HbA1c decreased significantly throughout the course of the study at a pace of - 2.2 mmol/mol (-0.2 %pt.) per visit (P = 0.01, CI[-3.2;-1.1]). The pace of the decrease in the average HbA1c was significantly higher in the group of CwD who received CGM in Czechia than in those who already had it from Ukraine by 2.9 mmol/mol (0.27 %pt.) per visit (P < 0.001, CI [-4.4; -1.3]). CONCLUSIONS The steepest decrease in HbA1c was observed in CwD with newly initiated CGM underlining its vital role in improving the glucose control of CwD regardless of their background.
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Affiliation(s)
- V Neuman
- Department of Pediatrics, 2(nd) Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czech Republic.
| | - D Vavra
- 3(rd) Faculty of Medicine, Charles University, Prague, Czech Republic
| | - L Drnkova
- Department of Pediatrics, 2(nd) Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czech Republic
| | - S Pruhova
- Department of Pediatrics, 2(nd) Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czech Republic
| | - L Plachy
- Department of Pediatrics, 2(nd) Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czech Republic
| | - S Kolouskova
- Department of Pediatrics, 2(nd) Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czech Republic
| | - B Obermannova
- Department of Pediatrics, 2(nd) Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czech Republic
| | - S A Amaratunga
- Department of Pediatrics, 2(nd) Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czech Republic
| | - P Konecna
- Department of Pediatrics, University Hospital Brno, Brno, Czech Republic
| | - J Vyzralkova
- Department of Pediatrics, University Hospital Brno, Brno, Czech Republic
| | - P Venhacova
- Department of Pediatrics, University Hospital Olomouc, Olomouc, Czech Republic
| | - R Pomahacova
- Department of Pediatrics, University Hospital Pilsen, Pilsen, Czech Republic
| | - P Paterova
- Department of Pediatrics, University Hospital Pilsen, Pilsen, Czech Republic
| | - L Stichova
- Department of Pediatrics, Masaryk Hospital, Usti nad Labem, Czech Republic
| | - J Skvor
- Department of Pediatrics, Masaryk Hospital, Usti nad Labem, Czech Republic
| | - K Kocourkova
- Department of Pediatrics, Ceske Budejovice Hospital, Ceske Budejovice, Czech Republic
| | - M Romanova
- Department of Pediatrics, 3(rd) Faculty of Medicine, Charles University and Kralovske Vinohrady University Hospital, Prague, Czech Republic
| | - J Vosahlo
- Department of Pediatrics, 3(rd) Faculty of Medicine, Charles University and Kralovske Vinohrady University Hospital, Prague, Czech Republic
| | - J Strnadel
- Department of Pediatrics, University Hospital Ostrava, Ostrava, Czech Republic
| | - K Polockova
- Department of Pediatrics, University Hospital Ostrava, Ostrava, Czech Republic
| | - D Neumann
- Department of Pediatrics, University Hospital Hradec Kralove, Hradec Kralove, Czech Republic
| | - M Slavenko
- Department of Pediatrics, 2(nd) Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czech Republic
| | - Z Sumnik
- Department of Pediatrics, 2(nd) Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czech Republic
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Schrammel JC, König M, Frommer M, Andersen KS, Kirsten M, Seifert R, Neumann D, Schirmer B. Histamine H 1- and H 4-receptor expression in human colon-derived cell lines. Naunyn Schmiedebergs Arch Pharmacol 2023; 396:3683-3693. [PMID: 37300703 PMCID: PMC10643376 DOI: 10.1007/s00210-023-02565-8] [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] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Accepted: 05/30/2023] [Indexed: 06/12/2023]
Abstract
In previous studies, we demonstrated the involvement of H4R in inflammatory bowel disease (IBD) and IBD-associated colon cancer in mice and could ascribe H4R-mediated histamine function to colon epithelial cells. The transferability of obtained data to humans is however lacking. Functional expression of H4R on colon epithelial cells is a prerequisite to pursue the hypothesis of involvement of H4R in carcinogenesis. Thus, we here compared the expression of histamine receptor subtypes in a series of cell lines. Out of these, three colon-derived cell lines displaying different combinations of H1R and H4R expression were submitted to functional analyses. Human hematopoietic HMC-1, HL-60, and U937, lung-derived A549 and Calu-3, and colorectal LoVo, SW 480, Caco-2, HT-29, and HCT116 cells were included in the study. mRNA expression was quantified by RT-qPCR. For functional analyses, Caco-2, HT-29, and HCT116 cells were treated by incubation with 1 - 10 µM histamine in the presence or absence of selective histamine receptor antagonists. Calcium mobilization, cAMP accumulation, and cell proliferation were measured by fluorimetry, mass spectrometry, and real-time bioimpedance measurements, respectively. Histamine receptor expression was heterogeneous in the cell lines tested. In most cell lines, we detected H1R mRNA while H4R mRNAs were found only occasionally. The colon-derived epithelial cell lines LoVo, SW480, and HT-29 expressed H1R mRNA exclusively, while in HCT116 cells H1R and H4R mRNAs and in CaCo-2 H2R mRNA were detectable. Subsequent functional analyses in HT29, Caco-2, and HCT116 cells, however, indicated that only HT-29 responded to histamine stimulation, by means of H1R. For a detailed analysis of histamine receptor function, esp. that of H1R and H4R, in human colon-derived cell lines, the cell lines tested here are not fully convenient unless genetically modified.
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Affiliation(s)
| | - Martin König
- Institute of Pharmacology, Hannover Medical School, 30623, Hannover, Germany
| | - Miriam Frommer
- Institute of Pharmacology, Hannover Medical School, 30623, Hannover, Germany
| | | | - Marla Kirsten
- Institute of Pharmacology, Hannover Medical School, 30623, Hannover, Germany
| | - Roland Seifert
- Institute of Pharmacology, Hannover Medical School, 30623, Hannover, Germany
| | - Detlef Neumann
- Institute of Pharmacology, Hannover Medical School, 30623, Hannover, Germany
| | - Bastian Schirmer
- Institute of Pharmacology, Hannover Medical School, 30623, Hannover, Germany.
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3
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Malka R, Kolomansky A, Ezra JB, Neumann D, Mittelman M, Oster H. Topic: AS04-MDS Biology and Pathogenesis/AS04i-Microenvironment and stem cell niche. Leuk Res 2021. [DOI: 10.1016/j.leukres.2021.106681.35] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Affiliation(s)
- Detlef Neumann
- Institute of Pharmacology, Hannover Medical School, Carl-Neuberg-Str. 1, 30625, Hannover, Germany
| | - Roland Seifert
- Institute of Pharmacology, Hannover Medical School, Carl-Neuberg-Str. 1, 30625, Hannover, Germany.
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5
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Sun A, Simsek Papur O, Dirkx E, Wong L, Sips T, Wang S, Strzelecka A, Nabben M, Glatz JFC, Neumann D, Luiken JJFP. Phosphatidylinositol 4-kinase IIIβ mediates contraction-induced GLUT4 translocation and shows its anti-diabetic action in cardiomyocytes. Cell Mol Life Sci 2020; 78:2839-2856. [PMID: 33090289 PMCID: PMC8004495 DOI: 10.1007/s00018-020-03669-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Revised: 08/31/2020] [Accepted: 10/05/2020] [Indexed: 01/15/2023]
Abstract
In the diabetic heart, long-chain fatty acid (LCFA) uptake is increased at the expense of glucose uptake. This metabolic shift ultimately leads to insulin resistance and a reduced cardiac function. Therefore, signaling kinases that mediate glucose uptake without simultaneously stimulating LCFA uptake could be considered attractive anti-diabetic targets. Phosphatidylinositol-4-kinase-IIIβ (PI4KIIIβ) is a lipid kinase downstream of protein kinase D1 (PKD1) that mediates Golgi-to-plasma membrane vesicular trafficking in HeLa-cells. In this study, we evaluated whether PI4KIIIβ is involved in myocellular GLUT4 translocation induced by contraction or oligomycin (an F1F0-ATP synthase inhibitor that activates contraction-like signaling). Pharmacological targeting, with compound MI14, or genetic silencing of PI4KIIIβ inhibited contraction/oligomycin-stimulated GLUT4 translocation and glucose uptake in cardiomyocytes but did not affect CD36 translocation nor LCFA uptake. Addition of the PI4KIIIβ enzymatic reaction product phosphatidylinositol-4-phosphate restored oligomycin-stimulated glucose uptake in the presence of MI14. PI4KIIIβ activation by PKD1 involves Ser294 phosphorylation and altered its localization with unchanged enzymatic activity. Adenoviral PI4KIIIβ overexpression stimulated glucose uptake, but did not activate hypertrophic signaling, indicating that unlike PKD1, PI4KIIIβ is selectively involved in GLUT4 translocation. Finally, PI4KIIIβ overexpression prevented insulin resistance and contractile dysfunction in lipid-overexposed cardiomyocytes. Together, our studies identify PI4KIIIβ as positive and selective regulator of GLUT4 translocation in response to contraction-like signaling, suggesting PI4KIIIβ as a promising target to rescue defective glucose uptake in diabetics.
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Affiliation(s)
- A Sun
- Department of Genetics and Cell Biology, Faculty of Health, Medicine and Life Sciences, Maastricht University Medical Center+, 6200 MD, Maastricht, The Netherlands
| | - O Simsek Papur
- Department of Genetics and Cell Biology, Faculty of Health, Medicine and Life Sciences, Maastricht University Medical Center+, 6200 MD, Maastricht, The Netherlands
| | - E Dirkx
- Department of Genetics and Cell Biology, Faculty of Health, Medicine and Life Sciences, Maastricht University Medical Center+, 6200 MD, Maastricht, The Netherlands
| | - L Wong
- Department of Genetics and Cell Biology, Faculty of Health, Medicine and Life Sciences, Maastricht University Medical Center+, 6200 MD, Maastricht, The Netherlands.,Department of Clinical Genetics, Faculty of Health, Medicine and Life Sciences, Maastricht University Medical Center+, 6200 MD, Maastricht, The Netherlands
| | - T Sips
- Department of Genetics and Cell Biology, Faculty of Health, Medicine and Life Sciences, Maastricht University Medical Center+, 6200 MD, Maastricht, The Netherlands
| | - S Wang
- Department of Genetics and Cell Biology, Faculty of Health, Medicine and Life Sciences, Maastricht University Medical Center+, 6200 MD, Maastricht, The Netherlands
| | - A Strzelecka
- Department of Genetics and Cell Biology, Faculty of Health, Medicine and Life Sciences, Maastricht University Medical Center+, 6200 MD, Maastricht, The Netherlands
| | - M Nabben
- Department of Genetics and Cell Biology, Faculty of Health, Medicine and Life Sciences, Maastricht University Medical Center+, 6200 MD, Maastricht, The Netherlands.,Department of Clinical Genetics, Faculty of Health, Medicine and Life Sciences, Maastricht University Medical Center+, 6200 MD, Maastricht, The Netherlands.,CARIM School for Cardiovascular Diseases, Maastricht, The Netherlands
| | - J F C Glatz
- Department of Genetics and Cell Biology, Faculty of Health, Medicine and Life Sciences, Maastricht University Medical Center+, 6200 MD, Maastricht, The Netherlands.,Department of Clinical Genetics, Faculty of Health, Medicine and Life Sciences, Maastricht University Medical Center+, 6200 MD, Maastricht, The Netherlands
| | - D Neumann
- Department of Pathology, Faculty of Health, Medicine and Life Sciences, Maastricht University Medical Center+, 6200 MD, Maastricht, The Netherlands.,CARIM School for Cardiovascular Diseases, Maastricht, The Netherlands
| | - J J F P Luiken
- Department of Genetics and Cell Biology, Faculty of Health, Medicine and Life Sciences, Maastricht University Medical Center+, 6200 MD, Maastricht, The Netherlands.
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Costamagna D, Duelen R, Penna F, Neumann D, Costelli P, Sampaolesi M. Interleukin-4 administration improves muscle function, adult myogenesis, and lifespan of colon carcinoma-bearing mice. J Cachexia Sarcopenia Muscle 2020; 11:783-801. [PMID: 32103619 PMCID: PMC7296260 DOI: 10.1002/jcsm.12539] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Revised: 11/22/2019] [Accepted: 01/07/2020] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND Anorexia, body wasting, inflammation, muscle, and adipose tissue loss are hallmarks of cancer cachexia, a syndrome that affects the majority of cancer patients, impairing their ability to endure chemotherapeutic therapies and reducing their lifespan. In the last 10 years, alterations of protein turnover and impairment of adult myogenesis have been proposed as major contributing factors. METHODS Muscle stem cells, including satellite cells, mesoangioblasts, and fibroadipogenic progenitors, were isolated and characterized from C26 colon carcinoma-bearing (C26) mice. Circulating levels of interleukin-4/13 (IL4/IL13) were analysed by ELISA, and the effects of IL4 on muscle mass and function, protein synthesis, muscle regeneration, and myogenic progenitor cell number were analysed at both functional (treadmill and grip test) and molecular levels (qRT-PCR, immunofluorescence analysis, surface sensing of translation, and western blot). The Kaplan-Meier test was used to analyse the survival curve of IL4-treated and IL4-untreated C26 mice. RESULTS The administration of IL4 to C26 mice rescued muscle mass by increasing protein synthesis. The IL4 treatment improved performances and prolonged survival of C26 mice. IL4 administration re-established both number and function of satellite cells and fibroadipogenic progenitors without affecting mesoangioblasts in C26 mice, rescuing myogenesis. Upon IL4 treatment, a high number of cytotoxic lymphocytes and type II macrophages were observed with a subsequent increase in necrotic areas of C26 tumours. CONCLUSIONS The results here presented shed new light on IL4 signalling during muscle wasting and early stages of muscle regeneration that explain the beneficial effect observed in IL4-treated C26 mice. These findings might aid to develop therapeutic approaches to improve mobility and quality of life in cachectic patients.
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Affiliation(s)
- Domiziana Costamagna
- Translational Cardiomyology, Stem Cell Biology and Embryology, Department of Development and Regeneration, University Hospital Gasthuisberg, Leuven, Belgium
| | - Robin Duelen
- Translational Cardiomyology, Stem Cell Biology and Embryology, Department of Development and Regeneration, University Hospital Gasthuisberg, Leuven, Belgium
| | - Fabio Penna
- Experimental Medicine and Clinical Pathology Unit, Department of Clinical and Biological Sciences, University of Turin, Turin, Italy
| | - Detlef Neumann
- Institute of Pharmacology, Hannover Medical School, MHH, Hannover, Germany
| | - Paola Costelli
- Experimental Medicine and Clinical Pathology Unit, Department of Clinical and Biological Sciences, University of Turin, Turin, Italy
| | - Maurilio Sampaolesi
- Translational Cardiomyology, Stem Cell Biology and Embryology, Department of Development and Regeneration, University Hospital Gasthuisberg, Leuven, Belgium.,Human Anatomy Unit, Department of Public Health, Experimental and Forensic Medicine, University of Pavia, Pavia, Italy
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Schirmer B, Rother T, Bruesch I, Bleich A, Werlein C, Jonigk D, Seifert R, Neumann D. Genetic Deficiency of the Histamine H 4-Receptor Reduces Experimental Colorectal Carcinogenesis in Mice. Cancers (Basel) 2020; 12:cancers12040912. [PMID: 32276475 PMCID: PMC7226035 DOI: 10.3390/cancers12040912] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Revised: 04/05/2020] [Accepted: 04/06/2020] [Indexed: 02/08/2023] Open
Abstract
Colorectal cancer (CRC), a severe complication of inflammatory bowel diseases, is a common type of cancer and accounts for high mortality. CRC can be modeled in mice by application of the tumor promoter, azoxymethane (AOM), in combination with dextran sodium sulfate (DSS), which are able to induce colitis-like manifestations. Active colitis correlates with high mucosal concentrations of histamine, which, together with the histamine receptor subtype 4 (H4R), provide a pro-inflammatory function in a mouse colitis model. Here, we analyzed whether H4R is involved in the pathogenesis of AOM/DSS-induced CRC in mice. As compared to wild type (WT) mice, AOM/DSS-treated mice lacking H4R expression (TM) demonstrate ameliorated signs of CRC, i.e., significantly reduced loss of body weight, stiffer stool consistency, and less severe perianal bleeding. Importantly, numbers and diameters of tumors and the degree of colonic inflammation are dramatically reduced in TM mice as compared to WT mice. This is concomitant with a reduced colonic inflammatory response involving expression of cyclooxygenase 2 and the production of C-X-C motif chemokine ligand 1 (CXCL1) and CXCL2. We conclude that H4R is involved in the tumorigenesis of chemically-induced CRC in mice via cyclooxygenase 2 expression and, probably, CXCL1 and CXCL2 as effector molecules.
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Affiliation(s)
- Bastian Schirmer
- Institute of Pharmacology, Hannover Medical School, 30625 Hannover, Germany
| | - Tamina Rother
- Institute of Pharmacology, Hannover Medical School, 30625 Hannover, Germany
- Institute of Pathology and German Center of Lung Research (DZL), Partner site BREATH, Hannover Medical School, 30625 Hannover, Germany
| | - Inga Bruesch
- Institute of Transfusion Medicine, Hannover Medical School, 30625 Hannover, Germany
| | - Andre Bleich
- Institute of Transfusion Medicine, Hannover Medical School, 30625 Hannover, Germany
| | - Christopher Werlein
- Institute for Laboratory Animal Science, Hannover Medical School, 30625 Hannover, Germany
| | - Danny Jonigk
- Institute for Laboratory Animal Science, Hannover Medical School, 30625 Hannover, Germany
| | - Roland Seifert
- Institute of Pharmacology, Hannover Medical School, 30625 Hannover, Germany
| | - Detlef Neumann
- Institute of Pharmacology, Hannover Medical School, 30625 Hannover, Germany
- Correspondence: ; Tel.: +49-511-532-4082
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8
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Schirmer B, Lindemann L, Bittkau KS, Isaev R, Bösche D, Juchem M, Seifert R, Neumann D. Mouse Colonic Epithelial Cells Functionally Express the Histamine H 4 Receptor. J Pharmacol Exp Ther 2020; 373:167-174. [PMID: 32029576 DOI: 10.1124/jpet.119.264408] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Accepted: 02/03/2020] [Indexed: 12/19/2022] Open
Abstract
We hypothesized that, in mice, histamine via the histamine receptor subtype 4 (H4R) on colon epithelial cells affects epithelial barrier integrity, perturbing physiologic function of the colonic mucosa and thus aggravating the severity of colitis. To test this hypothesis, bone marrow-chimeric mice were generated from H4R knockout (H4R-/-) and wild-type (WT) BALB/cJ mice and subjected to the dextrane sodium sulfate (DSS)-induced acute colitis model. Clinical symptoms and pathohistological derangements were scored. Additionally, total RNA was extracted from either mouse whole-colon homogenates or primary cell preparations enriched for epithelial cells, and gene expression was analyzed by real-time quantitative polymerase chain reaction. The impact of the H4R on epithelial barrier function was assessed by measurement of transepithelial electrical resistence of organoid-derived two-dimensional monolayers from H4R-/- and WT mice using chopstick electrodes. Bone marrow-chimeric mice with genetic depletion of the H4R in nonhematopoietic cells exhibited less severe DSS-induced acute colitis symptoms compared with WT mice, indicating a functional proinflammatory expression of H4R in nonimmune cells of the colon. Analysis of H4R expression revealed the presence of H4R mRNA in colon epithelial cells. This expression could be confirmed and complemented by functional analyses in organoid-derived epithelial cell monolayers. Thus, we conclude that the H4R is functionally expressed in mouse colon epithelial cells, potentially modulating mucosal barrier integrity and intestinal inflammatory reactions, as was demonstrated in the DSS-induced colitis model, in which presence of the H4R on nonhematopoietic cells aggravated the inflammatory phenotype. SIGNIFICANCE STATEMENT: The histamine H4 receptor (H4R) is functionally expressed on mouse colon epithelial cells, thereby aggravating dextrane sodium sulfate-induced colitis in BALB/cJ mice. Histamine via the H4R reduces transepithelial electrical resistance of colon epithelial monolayers, indicating a function of H4R in regulation of epithelial barrier integrity.
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Affiliation(s)
- Bastian Schirmer
- Institute of Pharmacology, Hannover Medical School, Hannover, Germany
| | - Luisa Lindemann
- Institute of Pharmacology, Hannover Medical School, Hannover, Germany
| | | | - Rukijat Isaev
- Institute of Pharmacology, Hannover Medical School, Hannover, Germany
| | - Daniela Bösche
- Institute of Pharmacology, Hannover Medical School, Hannover, Germany
| | - Malte Juchem
- Institute of Pharmacology, Hannover Medical School, Hannover, Germany
| | - Roland Seifert
- Institute of Pharmacology, Hannover Medical School, Hannover, Germany
| | - Detlef Neumann
- Institute of Pharmacology, Hannover Medical School, Hannover, Germany
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Soe K, Beard H, Neumann D, Trim PJ, Duplock S, Snel MF, Hopwood JJ, Hemsley KM. Early disease course is unaltered in mucopolysaccharidosis type IIIA (MPS IIIA) mice lacking α-synuclein. Neuropathol Appl Neurobiol 2019; 45:715-731. [PMID: 30907009 DOI: 10.1111/nan.12548] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Accepted: 03/19/2019] [Indexed: 11/26/2022]
Abstract
BACKGROUND Sanfilippo syndrome (mucopolysaccharidosis type IIIA; MPS IIIA) is an inherited paediatric-onset neurodegenerative disorder caused by the lysosomal deficiency of sulphamidase with subsequent accumulation of heparan sulphate. The pathological mechanisms responsible for clinical disease are unknown; however, intraneuronal accumulation of aggregation-prone proteins such as α-synuclein, phosphorylated tau and amyloid precursor protein suggests inefficient intracellular trafficking and lysosomal degradation. AIM To investigate the contribution the accumulating α-synuclein plays in early symptom emergence that is, impaired cognition, reduced anxiety and motor deficits, first detectable between 3-5 months of age. METHODS We have crossed congenic MPS IIIA mice with α-synuclein-deficient (Sncatm1Rosl /J) mice and evaluated phenotype and brain disease lesions. RESULTS In a battery of behavioural tests performed on mice aged 12-22 weeks, we were unable to differentiate α-synuclein-deficient MPS IIIA mice from those with one or both copies of the α-synuclein gene; all three affected genotypes were significantly impaired in test performance when compared to wild-type littermates. Histological studies revealed that the rate, location and nature of deposition of other proteinaceous lesions, the disruption to endolysosomal protein expression and the inflammatory response seen in the brain of α-synuclein-deficient MPS IIIA mice reflected that seen in MPS IIIA mice homo- or heterozygous for α-synuclein. CONCLUSION Deletion and/or deficiency of α-synuclein does not influence clinical and neuropathological disease progression in murine MPS IIIA, demonstrating that in and of itself, this protein does not initiate the cognitive and motor symptoms that occur in the first 5 months of life in MPS IIIA mice.
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Affiliation(s)
- K Soe
- Hopwood Centre for Neurobiology (HCN), South Australian Health and Medical Research Institute (SAHMRI), Adelaide, SA, Australia.,Department of Paediatrics, University of Adelaide, Adelaide, SA, Australia
| | - H Beard
- Hopwood Centre for Neurobiology (HCN), South Australian Health and Medical Research Institute (SAHMRI), Adelaide, SA, Australia
| | - D Neumann
- Hopwood Centre for Neurobiology (HCN), South Australian Health and Medical Research Institute (SAHMRI), Adelaide, SA, Australia
| | - P J Trim
- Hopwood Centre for Neurobiology (HCN), South Australian Health and Medical Research Institute (SAHMRI), Adelaide, SA, Australia.,Department of Paediatrics, University of Adelaide, Adelaide, SA, Australia
| | - S Duplock
- Hopwood Centre for Neurobiology (HCN), South Australian Health and Medical Research Institute (SAHMRI), Adelaide, SA, Australia
| | - M F Snel
- Hopwood Centre for Neurobiology (HCN), South Australian Health and Medical Research Institute (SAHMRI), Adelaide, SA, Australia.,Department of Paediatrics, University of Adelaide, Adelaide, SA, Australia
| | - J J Hopwood
- Hopwood Centre for Neurobiology (HCN), South Australian Health and Medical Research Institute (SAHMRI), Adelaide, SA, Australia.,Department of Paediatrics, University of Adelaide, Adelaide, SA, Australia
| | - K M Hemsley
- Hopwood Centre for Neurobiology (HCN), South Australian Health and Medical Research Institute (SAHMRI), Adelaide, SA, Australia.,Department of Paediatrics, University of Adelaide, Adelaide, SA, Australia
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Schirmer B, Bringmann L, Seifert R, Neumann D. In vivo Evidence for Partial Activation of Eosinophils via the Histamine H 4-Receptor: Adoptive Transfer Experiments Using Eosinophils From H 4R -/- and H 4R +/+ Mice. Front Immunol 2018; 9:2119. [PMID: 30319608 PMCID: PMC6167465 DOI: 10.3389/fimmu.2018.02119] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Accepted: 08/28/2018] [Indexed: 12/13/2022] Open
Abstract
Our previous in vitro studies revealed that histamine via histamine the H4-receptors (H4R), as compared to other stimuli, such as eotaxin or formylpeptides, rather partially activates eosinophilic granulocytes (eosinophils). In order to evaluate the H4R-mediated activation of eosinophils in vivo, we employed dextran sodium sulfate (DSS)-induced colitis in mice, closely resembling human ulcerative colitis (UC), which is largely characterized by a local eosinophilic infiltration of the colon. IL-5-deficient BALB/c mice served as a model with reduced endogenous numbers of eosinophils, in which wild-type (H4R+/+) or H4R-deficient (H4R−/−) eosinophils were adoptively transferred during the course of DSS-induced colitis. During the 1-week observation period, transfer of eosinophils transiently reversed the acute clinical colitis-like phenotype (body weight loss, perianal bleeding, soft stool consistency) resulting from IL-5-deficiency. This reversion was significantly more pronounced upon transfer of eosinophils from H4R+/+ mice as compared to those from H4R−/− mice. Already at the end of the observation period, the clinical effects of the transfer of H4R+/+ and H4R−/− eosinophils became similar, as were the results of the histological examination of the cola and the analyses of cytokine production in cola and in re-stimulated lymph node cells performed at this time. Thus, analyzing clinical and pathological parameters representative of colitis in this model, we demonstrate that as well as in vitro, also in vivo histamine via the H4R only partially activates eosinophils.
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Affiliation(s)
- Bastian Schirmer
- Institute of Pharmacology, Hannover Medical School, Hannover, Germany
| | - Luisa Bringmann
- Institute of Pharmacology, Hannover Medical School, Hannover, Germany
| | - Roland Seifert
- Institute of Pharmacology, Hannover Medical School, Hannover, Germany
| | - Detlef Neumann
- Institute of Pharmacology, Hannover Medical School, Hannover, Germany
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Gorczynski RM, Alexander C, Brandenburg K, Chen Z, Heini A, Neumann D, Mach JP, Rietschel ET, Terskikh A, Ulmer AJ, Yu K, Zahringer U, Khatri I. Corrigendum to "An altered REDOX environment, assisted by over-expression of fetal hemoglobins, protects from inflammatory colitis and reduces inflammatory cytokine expression" [Int. Immunopharmacol. 50 (2017) 69-76]. Int Immunopharmacol 2018; 59:414. [PMID: 29681495 DOI: 10.1016/j.intimp.2018.04.023] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- R M Gorczynski
- Institute of Medical Sciences, University of Toronto, Toronto, Canada.
| | - C Alexander
- Research Center Borstel, Leibniz-Center for Medicine and Biosciences, Borstel, Germany
| | - K Brandenburg
- Research Center Borstel, Leibniz-Center for Medicine and Biosciences, Borstel, Germany
| | - Z Chen
- Institute of Medical Sciences, University of Toronto, Toronto, Canada
| | - A Heini
- Clinique La Prairie, Clarens, Montreux, Switzerland
| | - D Neumann
- Clinique La Prairie, Clarens, Montreux, Switzerland
| | - J P Mach
- Department of Biochemistry, University of Lausanne, Switzerland
| | | | - A Terskikh
- Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, USA
| | - A J Ulmer
- Research Center Borstel, Leibniz-Center for Medicine and Biosciences, Borstel, Germany
| | - Kai Yu
- Institute of Medical Sciences, University of Toronto, Toronto, Canada
| | - U Zahringer
- Research Center Borstel, Leibniz-Center for Medicine and Biosciences, Borstel, Germany
| | - I Khatri
- Institute of Medical Sciences, University of Toronto, Toronto, Canada
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Kremláček J, Vitvarová T, Neumann D. 15-Sensory and cognitive processing of visual stimuli in adolescents with type 1 diabetes mellitus: Electrophysiological study. Clin Neurophysiol 2018. [DOI: 10.1016/j.clinph.2018.01.035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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13
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Neumann D, Kaleta EF, Lierz M. Semen collection and artificial insemination in cockatiels (Nymphicus hollandicus) – A potential model for psittacines. Tierarztl Prax Ausg K 2018. [DOI: 10.1055/s-0038-1623695] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
Summary
Study: Since many psittacine species are endangered and also rare in captivity, the number of offspring produced from breeding is crucial. Many potential breeding birds in species conservation programs are force-paired, and the eggs of many clutches are frequently infertile. Furthermore, male infertility is a common problem. The use of artificial insemination may increase the number of fertile eggs. Material and methods: In this study, 32 cockatiels (Nymphicus hollandicus) were divided into two groups. In one group, the males were endoscopically sterilised. The males of the other group were used as semen donors. After collection using a novel massage technique, semen samples were examined microscopically to assess contamination and quality. Samples with medium to high sperm concentrations, medium to high motility and no contaminants were used for intracloacal artificial insemination of hens in the group with sterile males. Results: In total, 74.2% of all attempts to collect semen were successful. Insemination resulted in fertilisation of 17 of 23 eggs (73.9%), which was slightly lower than the natural fertilisation rate (88.4%). No negative effects were observed on the oviposition interval of the inseminated hens throughout the entire study. Clinical relevance: Easily applicable in veterinary practice, this study demonstrates that the use of artificial insemination may be a valuable tool to address reproductive failure of psittacines in breeding projects.
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Neumann D, Borisenko AV, Coddington JA, Häuser CL, Butler CR, Casino A, Vogel JC, Haszprunar G, Giere P. Global biodiversity research tied up by juridical interpretations of access and benefit sharing. ORG DIVERS EVOL 2017. [DOI: 10.1007/s13127-017-0347-1] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Wunschel EJ, Schirmer B, Seifert R, Neumann D. Lack of Histamine H 4-Receptor Expression Aggravates TNBS-Induced Acute Colitis Symptoms in Mice. Front Pharmacol 2017; 8:642. [PMID: 28955241 PMCID: PMC5601386 DOI: 10.3389/fphar.2017.00642] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Accepted: 08/30/2017] [Indexed: 12/22/2022] Open
Abstract
Inflammatory bowel diseases (IBD) are a growing health problem worldwide, severely affecting patients’ life qualities and life expectancies. Therapeutic options, which are rare and focus on symptoms associated with the disease, suffer from increasing numbers of patients refractory to the established strategies. Thus, in order to generate new therapeutic regimens, the detailed understanding of the pathogenic mechanisms causing IBD is necessary. Histamine is an inflammatory mediator associated with IBD. Four histamine receptors are currently known of which the histamine H4-receptor (H4R) has been shown to possess a pro-inflammatory function in several experimental models of inflammatory diseases, including dextran sodium sulfate (DSS)-induced colitis in mice. No single model reflects the complexity of human IBD, but each model provides valuable information on specific aspects of IBD pathogenesis. While DSS-induced colitis mostly relies on innate immune mechanisms, trinitrobenzene sulfonic acid (TNBS)-induced colitis rather reflects T-cell mechanisms. Consequently, an observation made in a single model has to be verified in at least one other model. Therefore, in the present study we investigated the effect of genetic blockade of H4R-signaling in mice subjected to the model of TNBS-induced acute colitis. We analyzed severity and progression of clinical signs of colitis, as well as histopathologic alterations in the colon and local cytokine production. Genetic ablation of H4R expression worsened clinical signs of acute colitis and histological appearance of colon inflammation after TNBS application. Moreover, TNBS instillation enhanced local synthesis of inflammatory mediators associated with a neutrophilic response, i.e., CXCL1, CXCL2, and interleukin-6. Lastly, also myeloperoxidase concentration, indicative for the presence of neutrophils, was elevated in cola of TNBS-treated mice due to the absence of H4R expression. Our results indicate an anti-inflammatory role of histamine via H4R in TNBS-induced acute neutrophilic colitis in mice, thus questioning the strategy of pharmacological H4R blocked as new therapeutic option for patients suffering from IBD.
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Affiliation(s)
- Eva J Wunschel
- Institute of Pharmacology, Hannover Medical SchoolHanover, Germany
| | - Bastian Schirmer
- Institute of Pharmacology, Hannover Medical SchoolHanover, Germany
| | - Roland Seifert
- Institute of Pharmacology, Hannover Medical SchoolHanover, Germany
| | - Detlef Neumann
- Institute of Pharmacology, Hannover Medical SchoolHanover, Germany
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Gorczynski R, Alexander C, Brandenburg K, Chen Z, Heini A, Neumann D, Mach J, Rietschel E, Tersikh A, Ulmer A, Yu K, Zahringer U, Khatri I. An altered REDOX environment, assisted by over-expression of fetal hemoglobins, protects from inflammatory colitis and reduces inflammatory cytokine expression. Int Immunopharmacol 2017. [DOI: 10.1016/j.intimp.2017.06.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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Oedingen C, Krauth C, Girndt M, Mau W, Neumann D. The Choice of Renal Replacement Therapy (CORETH) Project: Patient Participation, Quality of Life and Economic Consequences. Das Gesundheitswesen 2017. [DOI: 10.1055/s-0037-1605761] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- C Oedingen
- Medizinische Hochschule Hannover, Institut für Epidemiologie, Sozialmedizin und Gesundheitssystemforschung, Hannover
| | - C Krauth
- Medizinische Hochschule Hannover, Institut für Epidemiologie, Sozialmedizin und Gesundheitssystemforschung, Hannover
| | - M Girndt
- Martin-Luther-Universität Halle-Wittenberg, Klinik für Innere Medizin II, Halle (Saale)
| | - W Mau
- Martin-Luther-Universität Halle-Wittenberg, Institut für Rehabilitationsmedizin, Halle (Saale)
| | - D Neumann
- Martin-Luther-Universität Halle-Wittenberg, Institut für Rehabilitationsmedizin, Halle (Saale)
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Del Poggetto E, Tanturli M, Ben-Califa N, Gozzini A, Tusa I, Cheloni G, Marzi I, Cipolleschi MG, Kashman Y, Neumann D, Rovida E, Dello Sbarba P. Salarin C inhibits the maintenance of chronic myeloid leukemia progenitor cells. Cell Cycle 2016; 14:3146-54. [PMID: 26291130 DOI: 10.1080/15384101.2015.1078029] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
Abstract
We previously showed that incubation of chronic myeloid leukemia (CML) cells in very low oxygen selects a cell subset where the oncogenetic BCR/Abl protein is suppressed and which is thereby refractory to tyrosine kinase inhibitors used for CML therapy. In this study, salarin C, an anticancer macrolide extracted from the Fascaplysinopsis sponge, was tested as for its activity on CML cells, especially after their incubation in atmosphere at 0.1% oxygen. Salarin C induced mitotic cycle arrest, apoptosis and DNA damage. Salarin C also concentration-dependently inhibited the maintenance of stem cell potential in cultures in low oxygen of either CML cell lines or primary cells. Surprisingly, the drug also concentration-dependently enforced the maintenance of BCR/Abl signaling in low oxygen, an effect which was paralleled by the rescue of sensitivity of stem cell potential to IM. These results suggest a potential use of salarin C for the suppression of CML cells refractory to tyrosine kinase inhibitors.
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Affiliation(s)
- E Del Poggetto
- a Department of Experimental and Clinical Biomedical Sciences "Mario Serio" ; Universita degli Studi di Firenze ; Florence , Italy
| | - M Tanturli
- a Department of Experimental and Clinical Biomedical Sciences "Mario Serio" ; Universita degli Studi di Firenze ; Florence , Italy
| | - N Ben-Califa
- b Department of Cell and Developmental Biology; Sackler Faculty of Medicine ; Tel Aviv University ; Tel Aviv , Israel
| | - A Gozzini
- c Hematology Unit; "Careggi" University Hospital ; Florence , Italy
| | - I Tusa
- a Department of Experimental and Clinical Biomedical Sciences "Mario Serio" ; Universita degli Studi di Firenze ; Florence , Italy
| | - G Cheloni
- a Department of Experimental and Clinical Biomedical Sciences "Mario Serio" ; Universita degli Studi di Firenze ; Florence , Italy
| | - I Marzi
- a Department of Experimental and Clinical Biomedical Sciences "Mario Serio" ; Universita degli Studi di Firenze ; Florence , Italy
| | - M G Cipolleschi
- a Department of Experimental and Clinical Biomedical Sciences "Mario Serio" ; Universita degli Studi di Firenze ; Florence , Italy
| | - Y Kashman
- d School of Chemistry ; Tel Aviv University ; Tel Aviv , Israel
| | - D Neumann
- b Department of Cell and Developmental Biology; Sackler Faculty of Medicine ; Tel Aviv University ; Tel Aviv , Israel
| | - E Rovida
- a Department of Experimental and Clinical Biomedical Sciences "Mario Serio" ; Universita degli Studi di Firenze ; Florence , Italy
| | - P Dello Sbarba
- a Department of Experimental and Clinical Biomedical Sciences "Mario Serio" ; Universita degli Studi di Firenze ; Florence , Italy
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Abstract
OBJECTIVE AND DESIGN The modulation of antigen uptake and activation of dendritic cells (DCs) by histamine may function as a regulator of inflammation. Therefore, we sought to determine the impact of histamine on antigen uptake by and activation of murine DCs. MATERIAL AND METHODS DCs from spleen and lung were either identified by flow cytometry or were immunomagnetically enriched. Cells were stimulated with histamine, and the regulation of MHC-II and co-stimulatory molecule expression (CD80, CD86, and ICOS-L) and antigen uptake were quantified by flow cytometry. Individual contributions of the histamine receptor subtypes were determined by using the antagonists mepyramine (histamine H1-receptor: H1R), famotidine (H2R), and JNJ 7777120 (H4R). RESULTS Histamine accelerated the uptake of soluble antigen via the H1R, H2R, and H4R in splenic DCs. Co-stimulatory molecule expression was enhanced already by enrichment procedures, thus, the analyses were performed in unseparated cell populations. Histamine enhanced the expression of CD86 and ICOS-L while expression of CD80 was unaffected. Antagonism at H1R, H2R, and H4R and at H1R and H4R reduced the histamine-induced enhanced expression of CD86 and ICOS-L, respectively. CONCLUSIONS Histamine contributes to the regulation of the immunological synapse by stimulation of antigen uptake and activation of DCs via H1R, H2R, and H4R.
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Affiliation(s)
- Heiko Schenk
- a Institute of Pharmacology, Hannover Medical School , Hannover , Germany
| | - Detlef Neumann
- a Institute of Pharmacology, Hannover Medical School , Hannover , Germany
| | - Christina Kloth
- a Institute of Pharmacology, Hannover Medical School , Hannover , Germany ;,b Institute of Applied Anatomy, Hannover Medical School , Hannover , Germany
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Jiang P, Kanzia G, Neumann D, Roider J, Dunst J. 106Ruthenium Eye Plaque Brachytherapy in the Management of Medium Sized Uveal Melanoma. Int J Radiat Oncol Biol Phys 2015. [DOI: 10.1016/j.ijrobp.2015.07.741] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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21
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Werner K, Neumann D, Seifert R. High constitutive Akt2 activity in U937 promonocytes: effective reduction of Akt2 phosphorylation by the histamine H2-receptor and the β2-adrenergic receptor. Naunyn Schmiedebergs Arch Pharmacol 2015; 389:87-101. [PMID: 26475619 DOI: 10.1007/s00210-015-1179-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2015] [Accepted: 09/30/2015] [Indexed: 02/07/2023]
Abstract
Histamine (HA) is approved for the treatment of acute myeloid leukemia (AML). Its antileukemic activity is related to histamine H2-receptor (H2R)-mediated inhibition of reactive oxygen species (ROS) production in myeloid cells facilitating survival of antineoplastic lymphocytes. The phosphatidylinositol 3-kinase (PI3K)/Akt signaling pathway, which plays a crucial role in cell survival and proliferation, is constitutively activated in leukemic cells of most AML patients resulting in poor survival prognosis. In a proof-of-principle experiment using a human phosphorylated mitogen-activated protein kinase (MAPK) array, we found high phosphorylation levels of Akt2 in U937 promonocytes that was abrogated by HA or selective H2R agonists. The H2R and the β2-adrenergic receptor (β2AR) are Gs-protein-coupled receptors. Stimulation results in adenylyl cyclase activation followed by generation of the second messenger adenosine 3′,5′-cyclic monophosphate (cAMP). In our present study, we evaluated the pharmacological profile of the H2R and the β2AR regarding Akt2 phosphorylation at Ser474 via western blot analysis and ELISA and cAMP accumulation via HPLC-MS/MS in U937 promonocytes. H2R and β2AR agonists concentration-dependently decreased Akt2 phosphorylation at Ser474. Deviations of potencies and efficacies of agonists in Akt2 phosphorylation and cAMP accumulation assays indicated participation of cAMP-independent signaling in GPCR-induced reduction of Akt2 phosphorylation. Accordingly, our study supports the concept of functional selectivity of the H2R and the β2AR in U937 promonocytes. In summary, we extended the antileukemic mechanism of HA via H2R and revealed the potential of β2AR agonists, which are already approved in the treatment of bronchial asthma and chronic obstructive pulmonary disease, as antileukemic drugs.
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Schirmer B, Wedekind D, Glage S, Neumann D. Deletion of IL-18 Expression Ameliorates Spontaneous Kidney Failure in MRLlpr Mice. PLoS One 2015; 10:e0140173. [PMID: 26465326 PMCID: PMC4605611 DOI: 10.1371/journal.pone.0140173] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2015] [Accepted: 09/21/2015] [Indexed: 01/14/2023] Open
Abstract
The role of IL-18 in the pathogenesis of systemic lupus erythematosus is still not definitively solved. In this study, we generated MRLlpr mice, which develop a disease resembling systemic lupus erythematosus, genetically devoid of IL-18 expression. These mice in comparison to IL-18-competent MRLlpr mice show reduced signs of renal pathogenesis, while other parameters such as mean survival time, lymphadenopathy, constitutive interferon-γ production, and frequency of CD3+B220+ abnormal T cells were without differences. We conclude that in the systemic lupus erythematosus syndrom IL-18 is involved specifically in the renal pathogenesis.
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Affiliation(s)
- Bastian Schirmer
- Institute of Pharmacology, Hannover Medical School, Hannover, Germany
| | - Dirk Wedekind
- Institute of Laboratory Animal Science, Hannover Medical School, Hannover, Germany
| | - Silke Glage
- Institute of Laboratory Animal Science, Hannover Medical School, Hannover, Germany
| | - Detlef Neumann
- Institute of Pharmacology, Hannover Medical School, Hannover, Germany
- * E-mail:
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Schirmer B, Rezniczek T, Seifert R, Neumann D. Proinflammatory role of the histamine H4 receptor in dextrane sodium sulfate-induced acute colitis. Biochem Pharmacol 2015; 98:102-9. [PMID: 26365468 DOI: 10.1016/j.bcp.2015.09.006] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2015] [Accepted: 09/08/2015] [Indexed: 12/16/2022]
Abstract
Millions of people worldwide are suffering from inflammatory bowel disease (IBD), which severely affects patients' life qualities and even life expectancies. The cause of the ailment is unknown and a profound understanding of the underlying pathogenetic mechanisms is still lacking. The biogenic amine histamine is one of several inflammatory mediators, to which a pathogenetic role in IBD has been attributed. Out of the four known histamine receptors, the histamine H4 receptor (H4R) has been demonstrated to act proinflammatory in experimental models of several inflammatory diseases. In order to evaluate a potential involvement of H4R in IBD we investigated the effect of genetic or pharmacological blockade of H4R-signaling in the model of dextran sodium sulfate (DSS)-induced colitis in mice. We analysed severity and progression of clinical signs of colitis, as well as histopathologic alterations in the colons and systemic or local cytokine concentrations. Both genetic deficiency and pharmacological blockade of H4R with the selective antagonist JNJ7777120 improved clinical and histological signs of colitis and dampened the inflammatory cytokine response. Our results indicate a proinflammatory role of histamine via H4R in IBD, thus extending the current pathophysiological understanding of IBD and demonstrating the therapeutic potential of selective H4R-antagonists for patients suffering from IBD.
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Affiliation(s)
- Bastian Schirmer
- Institute of Pharmacology, Hannover Medical School, Hannover, Germany.
| | - Thomas Rezniczek
- Institute of Pharmacology, Hannover Medical School, Hannover, Germany
| | - Roland Seifert
- Institute of Pharmacology, Hannover Medical School, Hannover, Germany
| | - Detlef Neumann
- Institute of Pharmacology, Hannover Medical School, Hannover, Germany
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Conn CE, Bythell-Douglas R, Neumann D, Yoshida S, Whittington B, Westwood JH, Shirasu K, Bond CS, Dyer KA, Nelson DC. Convergent evolution of strigolactone perception enabled host detection in parasitic plants. Science 2015; 349:540-3. [DOI: 10.1126/science.aab1140] [Citation(s) in RCA: 219] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Werner K, Kälble S, Wolter S, Schneider EH, Buschauer A, Neumann D, Seifert R. Flow cytometric analysis with a fluorescently labeled formyl peptide receptor ligand as a new method to study the pharmacological profile of the histamine H2 receptor. Naunyn Schmiedebergs Arch Pharmacol 2015; 388:1039-52. [PMID: 26021872 DOI: 10.1007/s00210-015-1133-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2015] [Accepted: 05/18/2015] [Indexed: 01/14/2023]
Abstract
The histamine H2 receptor (H2R) is a Gs protein-coupled receptor. Its activation leads to increases in the second messenger adenosine-3',5'-cyclic monophosphate (cAMP). Presently, several systems are established to characterize the pharmacological profile of the H2R, mostly requiring radioactive material, animal models, or human blood cells. This prompted us to establish a flow cytometric analysis with a fluorescently labeled formyl peptide receptor (FPR) ligand in order to investigate the H2R functionally and pharmacologically. First, we stimulated U937 promonocytes, which mature in a cAMP-dependent fashion upon H2R activation, with histamine (HA) or selective H2R agonists and measured increases in cAMP concentrations by mass spectrometry. Next, indicative for the maturation of U937 promonocytes, we assessed the FPR expression upon incubation with HA or H2R agonists. FPR expression was measured either indirectly by formyl peptide-induced changes in intracellular calcium concentrations ([Ca(2+)]i) or directly with the fluorescein-labeled FPR ligand fNleLFNleYK-Fl. HA and H2R agonists concentration-dependently induced FPR expression, and potencies and efficacies of fMLP-induced increases in [Ca(2+)]i and FPR density correlated linearly. Accordingly, flow cytometric analysis of FPR expression constitutes a simple, inexpensive, sensitive, and reliable method to characterize the H2R pharmacologically. Furthermore, we evaluated FPR expression at the mRNA level. Generally, quantitative real-time polymerase chain reaction confirmed functional data. Additionally, our study supports the concept of functional selectivity of the H2R, since we observed dissociations in the efficacies of HA and H2R agonists in cAMP accumulation and FPR expression.
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Affiliation(s)
- Kristin Werner
- Institute of Pharmacology, Hannover Medical School, Carl-Neuberg-Straße 1, 30625, Hannover, Germany
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Goy SD, Olling A, Neumann D, Pich A, Gerhard R. Human neutrophils are activated by a peptide fragment of Clostridium difficile toxin B presumably via formyl peptide receptor. Cell Microbiol 2015; 17:893-909. [PMID: 25529763 DOI: 10.1111/cmi.12410] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2014] [Revised: 12/09/2014] [Accepted: 12/11/2014] [Indexed: 01/23/2023]
Abstract
Clostridium difficile may induce antibiotic-associated diarrhoea and, in severe cases, pseudomembranous colitis characterized by tremendous neutrophil infiltration. All symptoms are caused by two exotoxins: TcdA and TcdB. We describe here the activation of isolated human blood neutrophils by TcdB and, moreover, by toxin fragments generated by limited proteolytical digestion. Kinetics and profiles of TcdB-induced rise in intracellular-free Ca(2+) and reactive oxygen species production were similar to that induced by fMLF, which activates the formyl peptide receptor (FPR) recognizing formylated bacterial peptide sequences. Transfection assays with the FPR-1 isoform hFPR26 in HEK293 cells, heterologous desensitization experiments and FPR inhibition via cyclosporine H strongly suggest activation of cells via FPR-1. Domain analyses revealed that the N-terminal glucosyltransferase domain of TcdB is a potent activator of FPR pointing towards an additional mechanism that might contribute to pathogenesis. This pro-inflammatory ligand effect can be triggered even by cleaved and, thus, non-cytotoxic toxin. In summary, we report (i) a ligand effect on neutrophils as completely new molecular mode of action, (ii) pathogenic potential of truncated or proteolytically cleaved 'non-cytotoxic' fragments and (iii) an interaction of the N-terminal glucosyltransferase domain instead of the C-terminal receptor binding domain of TcdB with target cells.
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Affiliation(s)
| | | | - Detlef Neumann
- Institute of Pharmacology, Hannover Medical School, Germany
| | - Andreas Pich
- Institute of Toxicology, Hannover Medical School, Germany
| | - Ralf Gerhard
- Institute of Toxicology, Hannover Medical School, Germany
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Hartwig C, Munder A, Glage S, Wedekind D, Schenk H, Seifert R, Neumann D. The histamine H4 -receptor (H4 R) regulates eosinophilic inflammation in ovalbumin-induced experimental allergic asthma in mice. Eur J Immunol 2015; 45:1129-40. [PMID: 25501767 DOI: 10.1002/eji.201445179] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2014] [Revised: 11/18/2014] [Accepted: 12/09/2014] [Indexed: 01/05/2023]
Abstract
Via the histamine H4 -receptor (H4 R), histamine promotes the pathogenesis of experimental allergic asthma in mice. Application of H4 R antagonists during sensitization as well as during provocation reduces the severity of the disease. However, the specific cell types functionally expressing H4 R in experimental allergic asthma have not been well characterized in vivo. In this study, we identified the cell type(s) responsible for H4 R activity in experimental asthma and related physiological mechanisms. Using H4 R-deficient mice, we studied the role of H4 R in the sensitization and effector phase. DCs lacking H4 R expression during the in vitro sensitization reaction resulted in effector T cells unable to induce an entire eosinophilic inflammation in the lung upon adoptive transfer in vivo. Recipient mice lacking H4 R expression, which were adoptively transferred with H4 R(+/+) T cells polarized in the presence of H4 R(+/+) DCs, showed reduced signs of inflammation and ameliorated lung function. Here, we provide in vivo evidence that in experimental asthma in mice the H4 R specifically regulates activation of DCs during sensitization, while in the effector phase the H4 R is active in cells involved in the activation of eosinophils, and possibly other cells. A putative therapy targeting the H4 R may be an option for asthma patients developing IL-5-dependent eosinophilia.
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Affiliation(s)
- Christina Hartwig
- Institute of Pharmacology, Hannover Medical School, Hannover, Germany
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Werner K, Neumann D, Seifert R. Analysis of the histamine H2-receptor in human monocytes. Biochem Pharmacol 2014; 92:369-79. [DOI: 10.1016/j.bcp.2014.08.028] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2014] [Revised: 08/24/2014] [Accepted: 08/25/2014] [Indexed: 01/16/2023]
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Abstract
The histamine H4 receptor (H4R) is a classic pertussis toxin-sensitive Gi protein-coupled receptor that mediates increases in intracellular calcium concentration ([Ca(2+)]i). The presence of H4R in human eosinophils has been rigorously documented by several independent groups. It has also been suggested that H4R is expressed in human monocytes, but this suggestion hinges in part on H4R antibodies with questionable specificity. This situation prompted us to reinvestigate H4R expression in human monocytes. As positive control, we studied human embryonic kidney 293T cells stably expressing the human H4R (hH4R). In these cells, histamine (HA) and the H4R agonist UR-PI376 (2-cyano-1-[4-(1H-imidazol-4-yl)butyl]-3-[(2-phenylthio)ethyl]guanidine) induced pertussis toxin-sensitive [Ca(2+)]i increases. However, in quantitative real-time polymerase chain reaction studies we failed to detect hH4R mRNA in human monocytes and U937 promonocytes. In human monocytes, ATP and N-formyl-l-methionyl-l-leucyl-l-phenylalanine increased [Ca(2+)]i, but HA, UR-PI376, and 5-methylhistamine (a dual H4R/H2 receptor agonist) did not. In U937 promonocytes and differentiated U937 cells, HA increased [Ca(2+)]i, but this increase was mediated via HA H1 receptor. In conclusion, there is no evidence for the presence of H4R in human monocytes.
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Affiliation(s)
- Kristin Werner
- Institute of Pharmacology, Hannover Medical School, Hannover, Germany (K.W., D.N., R.S.); and Department of Pharmaceutical and Medicinal Chemistry II, University of Regensburg, Regensburg, Germany (A.B.)
| | - Detlef Neumann
- Institute of Pharmacology, Hannover Medical School, Hannover, Germany (K.W., D.N., R.S.); and Department of Pharmaceutical and Medicinal Chemistry II, University of Regensburg, Regensburg, Germany (A.B.)
| | - Armin Buschauer
- Institute of Pharmacology, Hannover Medical School, Hannover, Germany (K.W., D.N., R.S.); and Department of Pharmaceutical and Medicinal Chemistry II, University of Regensburg, Regensburg, Germany (A.B.)
| | - Roland Seifert
- Institute of Pharmacology, Hannover Medical School, Hannover, Germany (K.W., D.N., R.S.); and Department of Pharmaceutical and Medicinal Chemistry II, University of Regensburg, Regensburg, Germany (A.B.)
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Fischer D, Neumann D, Wehrend A, Lierz M. Comparison of conventional and computer-assisted semen analysis in cockatiels (Nymphicus hollandicus) and evaluation of different insemination dosages for artificial insemination. Theriogenology 2014; 82:613-20. [DOI: 10.1016/j.theriogenology.2014.05.023] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2013] [Revised: 05/26/2014] [Accepted: 05/26/2014] [Indexed: 10/25/2022]
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Neumann D, Seifert R. The therapeutic potential of histamine receptor ligands in inflammatory bowel disease. Biochem Pharmacol 2014; 91:12-7. [PMID: 24929116 DOI: 10.1016/j.bcp.2014.06.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2014] [Revised: 06/04/2014] [Accepted: 06/04/2014] [Indexed: 12/12/2022]
Abstract
In the intestine of patients suffering from inflammatory bowel disease concentrations of histamine are increased compared to healthy controls. Genetic ablation of histamine production in mice ameliorates the course of experimentally induced colitis. These observations and first pharmacological studies indicate a function of histamine in the pathogenesis of inflammatory bowel disease. However, a closer examination reveals that available data are highly heterogeneous, limiting the rational design of strategies addressing specific histamine receptor subtypes as possible target for pharmacological interaction. However, very recently first clinical data indicate that antagonism at the histamine receptor subtype H4 provides a beneficial effect in at least the skin. Here, we discuss the available data on histamine effects and histamine receptor subtype functions in inflammatory bowel disease with a special emphasis on the histamine H4-receptor.
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Affiliation(s)
- Detlef Neumann
- Institute of Pharmacology, Hannover Medical School, Germany.
| | - Roland Seifert
- Institute of Pharmacology, Hannover Medical School, Germany
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Mahapatra S, Albrecht M, Behrens B, Jirmo A, Behrens G, Hartwig C, Neumann D, Raap U, Bähre H, Herrick C, Dittrich AM. Delineating the role of histamine-1- and -4-receptors in a mouse model of Th2-dependent antigen-specific skin inflammation. PLoS One 2014; 9:e87296. [PMID: 24503582 PMCID: PMC3913588 DOI: 10.1371/journal.pone.0087296] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2013] [Accepted: 12/23/2013] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Histamine drives pruritus in allergic skin diseases which clinically constitutes a most disruptive symptom. Skin pathology in allergic skin diseases is crucially influenced by different T-helper subsets. However, the contribution of different histamine-receptors to T-helper cell dependent skin pathology has not been definitively answered. Models which can specifically address the functional role of T-helper subsets and the mediators involved are therefore valuable to gain further insights into molecular pathways which contribute to allergic skin disease. They might also be helpful to probe amendable therapeutic interventions such as histamine-receptor antagonism. OBJECTIVE Establishing an adoptive transfer model for antigen-specific Th cells, we aimed to delineate the role of histamine H1- and H4-receptors in Th2-dependent skin inflammation. METHODS In-vitro differentiated and OVA primed Th2 cells were adoptively transferred into congenic recipient mice. In vivo treatment with specific histamine H1- and H4-receptor antagonists was performed to analyze the contribution of these histamine-receptors to Th2-dependent skin pathology in our model. Analysis four days after epicutaneous challenge comprised skin histology, flow cytometric detection of transferred T-helper cells and analysis of antigen-cytokine profiles in skin-draining lymph nodes. RESULTS Use of specific H1- and H4-receptor antagonists revealed a crucial role for H1- and H4-receptors for Th2 migration and cytokine secretion in a Th2-driven model of skin inflammation. While H1- and H4-receptor antagonists both reduced Th2 recruitment to the site of challenge, local cytokine responses in skin-draining lymph nodes were only reduced by the combined application of H1- and H4-receptor antagonists and mast cell counts remained altogether unchanged by either H1R-, H4R- or combined antagonism. CONCLUSION Our model demonstrates a role for H1- and H4-receptors in Th2 cell infiltration and cytokine secretion in allergic skin diseases and suggests further studies to evaluate these findings for therapeutic approaches.
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Affiliation(s)
- Subhashree Mahapatra
- Department for Pediatric Pneumology, Allergology and Neonatology, Medical School Hannover, Hannover, Germany
| | - Melanie Albrecht
- Department for Pediatric Pneumology, Allergology and Neonatology, Medical School Hannover, Hannover, Germany
| | - Barbara Behrens
- Department for Pediatric Pneumology, Allergology and Neonatology, Medical School Hannover, Hannover, Germany
| | - Adan Jirmo
- Department of Clinical Immunology and Rheumatology, Medical School Hannover, Hannover, Germany
| | - Georg Behrens
- Department of Clinical Immunology and Rheumatology, Medical School Hannover, Hannover, Germany
| | - Christina Hartwig
- Institute of Pharmacology, Medical School Hannover, Hannover, Germany
| | - Detlef Neumann
- Institute of Pharmacology, Medical School Hannover, Hannover, Germany
| | - Ulrike Raap
- Department of Dermatology and Allergy, Medical School Hannover, Hannover, Germany
| | - Heike Bähre
- Institute of Pharmacology, Medical School Hannover, Hannover, Germany
| | - Christina Herrick
- Department of Dermatology, Yale School of Medicine, New Haven, Connecticut, United States of America
| | - Anna-Maria Dittrich
- Department for Pediatric Pneumology, Allergology and Neonatology, Medical School Hannover, Hannover, Germany
- * E-mail:
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Czerner CP, Klos A, Seifert R, Neumann D. Histamine induces chemotaxis and phagocytosis in murine bone marrow-derived macrophages and RAW 264.7 macrophage-like cells via histamine H4-receptor. Inflamm Res 2013; 63:239-47. [PMID: 24316866 DOI: 10.1007/s00011-013-0694-0] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2013] [Revised: 11/21/2013] [Accepted: 11/26/2013] [Indexed: 01/15/2023] Open
Abstract
OBJECTIVE Expression and function of histamine H4-receptor, an immunomodulatory receptor involved in inflammatory diseases, on murine macrophages, which are vital for immunity, were investigated. MATERIALS AND METHODS The expression pattern of histamine receptors on bone marrow-derived macrophages of BALB/c mice and on RAW 264.7 cells was studied at the mRNA level by reverse transcription polymerase chain reaction. The functional relevance of histamine receptors was investigated by analyzing histamine-induced chemotaxis and phagocytosis in the presence of histamine receptor antagonists mepyramine (histamine H1-receptor), famotidine (histamine H2-receptor), thioperamide (histamine H3/4-receptors) and JNJ7777120 (histamine H4-receptor). RESULTS Both bone marrow-derived macrophages and RAW 264.7 cells express mRNA for histamine H1-receptor and histamine H4-receptor. Residual amounts of histamine H2-receptor mRNA are found in bone marrow-derived macrophages only. In both cellular models, histamine induced chemotaxis and phagocytic activity, which was reduced by thioperamide as well as by JNJ 7777120, but not by mepyramine or famotidine. CONCLUSION In murine bone marrow-derived macrophages and RAW 264.7 macrophage-like cells histamine H4-receptor mediates chemotaxis and phagocytic activity.
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Affiliation(s)
- Christoph P Czerner
- Institute of Pharmacology, Hannover Medical School, Carl-Neuberg-Str. 1, 30625, Hannover, Germany
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Neumann D, Beermann S, Burhenne H, Glage S, Hartwig C, Seifert R. The dual H3/4R antagonist thioperamide does not fully mimic the effects of the 'standard' H4R antagonist JNJ 7777120 in experimental murine asthma. Naunyn Schmiedebergs Arch Pharmacol 2013; 386:983-90. [PMID: 23820873 DOI: 10.1007/s00210-013-0898-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Received: 03/21/2013] [Accepted: 06/17/2013] [Indexed: 10/26/2022]
Abstract
Histamine is detected in high concentrations in the airways during an allergic asthma response. In a murine model of allergic asthma, the histamine H4 receptor (H4R)-selective ligand JNJ 7777120 reduces asthma-like symptoms. A sole antagonistic function of JNJ 7777120 at the murine H4R has, however, been questioned in the literature. Therefore, in the present study, we aimed at analyzing the effects of JNJ 7777120 in comparison to that of the H3/4R-selective antagonist thioperamide. Experimental murine asthma was induced by sensitization and provocation of BALB/c mice with ovalbumine (OVA). JNJ 7777120, thioperamide, or JNJ 5207852, an H3R-selective antagonist which was used to dissect H3R- and H4R-mediated activities of thioperamide, were injected subcutaneously during sensitization and effects were analyzed after provocation. Pharmacokinetic analyses revealed shortest t1/2 values in both plasma and lung tissue and lowest maximal concentration in lung tissue for JNJ 7777120 in comparison to thioperamide and JNJ 5207852. Nevertheless, JNJ 7777120 reduced serum titers of allergen-specific (anti-OVA) IgE, inflammatory infiltrations in lung tissue, and eosinophilia in bronchoalveolar lavage fluid. In contrast, thioperamide reduced only eosinophilia in bronchoalveolar lavage fluid, while anti-OVA IgE concentrations and lung infiltrations remained unaffected. JNJ 5207852 had no effect on these parameters. JNJ 7777120 provides beneficial effects in experimental murine asthma, which, however, could only partially be mimicked by thioperamide, despite more favorable pharmacokinetics. Thus, whether these effects of JNJ 7777120 are entirely attributable to an antagonistic activity at the murine H4R or whether an agonistic activity is also involved has to be reconsidered.
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Affiliation(s)
- Detlef Neumann
- Institute of Pharmacology, Hannover Medical School, Carl-Neuberg-Str. 1, 30625, Hannover, Germany,
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Neumann D, Kaleta EF, Lierz M. Semen collection and artificial inseminationin cockatiels (Nymphicus hollandicus)--a potential model for psittacines. Tierarztl Prax Ausg K Kleintiere Heimtiere 2013; 41:101-105. [PMID: 23608965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Received: 02/23/2012] [Accepted: 08/17/2012] [Indexed: 06/02/2023]
Abstract
STUDY Since many psittacine species are endangered and also rare in captivity, the number of offspring produced from breeding is crucial. Many potential breeding birds in species conservation programs are force-paired, and the eggs of many clutches are frequently infertile. Furthermore, male infertility is a common problem. The use of artificial insemination may increase the number of fertile eggs. MATERIAL AND METHODS In this study, 32 cockatiels (Nymphicus hollandicus) were divided into two groups. In one group, the males were endoscopically sterilised. The males of the other group were used as semen donors. After collection using a novel massage technique, semen samples were examined microscopically to assess contamination and quality. Samples with medium to high sperm concentrations, medium to high motility and no contaminants were used for intracloacal artificial insemination of hens in the group with sterile males. RESULTS In total, 74.2% of all attempts to collect semen were successful. Insemination resulted in fertilisation of 17 of 23 eggs (73.9%), which was slightly lower than the natural fertilisation rate (88.4%). No negative effects were observed on the oviposition interval of the inseminated hens throughout the entire study. CLINICAL RELEVANCE Easily applicable in veterinary practice, this study demonstrates that the use of artificial insemination may be a valuable tool to address reproductive failure of psittacines in breeding projects.
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Affiliation(s)
- D Neumann
- Clinic for Birds, Reptiles, Amphibians and Fish, Justus-Liebig University Giessen, Frankfurter Strasse 91-93, Giessen, Germany.
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Seifert R, Strasser A, Schneider EH, Neumann D, Dove S, Buschauer A. Molecular and cellular analysis of human histamine receptor subtypes. Trends Pharmacol Sci 2012; 34:33-58. [PMID: 23254267 DOI: 10.1016/j.tips.2012.11.001] [Citation(s) in RCA: 126] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2012] [Revised: 11/03/2012] [Accepted: 11/05/2012] [Indexed: 01/08/2023]
Abstract
The human histamine receptors hH(1)R and hH(2)R constitute important drug targets, and hH(3)R and hH(4)R have substantial potential in this area. Considering the species-specificity of pharmacology of H(x)R orthologs, it is important to analyze hH(x)Rs. Here, we summarize current knowledge of hH(x)Rs endogenously expressed in human cells and hH(x)Rs recombinantly expressed in mammalian and insect cells. We present the advantages and disadvantages of the various systems. We also discuss problems associated with the use of hH(x)R antibodies, an issue of general relevance for G-protein-coupled receptors (GPCRs). There is much greater overlap in activity of 'selective' ligands for other hH(x)Rs than the cognate receptor subtype than generally appreciated. Studies with native and recombinant systems support the concept of ligand-specific receptor conformations, encompassing agonists and antagonists. It is emerging that for characterization of hH(x)R ligands, one cannot rely on a single test system and a single parameter. Rather, multiple systems and parameters have to be studied. Although such studies are time-consuming and expensive, ultimately, they will increase drug safety and efficacy.
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Affiliation(s)
- Roland Seifert
- Institute of Pharmacology, Medical School of Hannover, Hannover, Germany.
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Selzer D, Hahn T, Naegel A, Heisig M, Kostka KH, Lehr CM, Neumann D, Schaefer UF, Wittum G. Finite dose skin mass balance including the lateral part: comparison between experiment, pharmacokinetic modeling and diffusion models. J Control Release 2012; 165:119-28. [PMID: 23099116 DOI: 10.1016/j.jconrel.2012.10.009] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2012] [Revised: 10/10/2012] [Accepted: 10/12/2012] [Indexed: 11/29/2022]
Abstract
This work investigates in vitro finite dose skin absorption of the model compounds flufenamic acid and caffeine experimentally and mathematically. The mass balance in different skin compartments (donor, stratum corneum (SC), deeper skin layers (DSL), lateral skin parts and acceptor) is analyzed as a function of time. For both substances high amounts were found in the lateral skin compartment after 6h of incubation, which emphasizes not to elide these parts in the modeling. Here, three different mathematical models were investigated and tested with the experimental data: a pharmacokinetic model (PK), a detailed microscopic two-dimensional diffusion model (MICRO) and a macroscopic homogenized diffusion model (MACRO). While the PK model was fitted to the experimental data, the MICRO and the MACRO models employed input parameters derived from infinite dose studies to predict the underlying diffusion process. All models could satisfyingly predict or describe the experimental data. The PK model and MACRO model also feature the lateral parts.
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Affiliation(s)
- D Selzer
- Biopharmaceutics and Pharmaceutical Technology, Saarland University, Saarbruecken, Germany
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Krauss M, Mielczarek SR, Neumann D, Kuyatt CE. Mechanism for production of the Fourth Positive Band System of CO by electron impact on CO2. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/ja076i016p03733] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Abstract
Background: Recombinant human erythropoietin (EPO) is the leading biotechnology engineered hormone for treatment of anaemia associated with chronic conditions including kidney failure and cancer. The finding of EPO receptors on cancer cells has raised the concern that in addition to its action in erythropoiesis, EPO may promote tumour cell growth. We questioned whether EPO-induced signalling and consequent malignant cell manifestation is mediated by polyADP-ribosylation. Methods: Erythropoietin-mediated PARP (polyADP-ribose polymerase-1) activation, gene expression and core histone H4 acetylation were examined in UT7 cells, using western blot analysis, RT–PCR and immunofluorescence. Erythropoietin-driven migration of the human breast epithelial cell line MDA-MB-435 was determined by the scratch assay and in migration chambers. Results: We have found that EPO treatment induced PARP activation. Moreover, EPO-driven c-fos and Egr-1 gene expression as well as histone H4 acetylation were mediated via polyADP-ribosylation. Erythropoietin-induced cell migration was blocked by the PARP inhibitor, ABT-888, indicating an essential role for polyADP-ribosylation in this process. Conclusions: We have identified a novel pathway by which EPO-induced gene expression and breast cancer cell migration are regulated by polyADP-ribosylation. This study introduces new possibilities regarding EPO treatment for cancer-associated anaemia where combining systemic EPO treatment with targeted administration of PARP inhibitors to the tumour may allow safe treatment with EPO, minimising its possible undesirable proliferative effects on the tumour.
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Affiliation(s)
- D Inbar
- Department of Cell and Developmental Biology, Sackler Faculty of Medicine, Tel-Aviv University, Israel
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Reher TM, Brunskole I, Neumann D, Seifert R. Evidence for ligand-specific conformations of the histamine H(2)-receptor in human eosinophils and neutrophils. Biochem Pharmacol 2012; 84:1174-85. [PMID: 22922404 DOI: 10.1016/j.bcp.2012.08.014] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2012] [Revised: 08/16/2012] [Accepted: 08/17/2012] [Indexed: 01/18/2023]
Abstract
The histamine H(2)-receptor (H(2)R) couples to G(S)-proteins and induces adenylyl cyclase-mediated cAMP accumulation. In human neutrophils and eosinophils, the H(2)R reduces chemotactic peptide-stimulated superoxide anion (O(2)(-)) formation. However, pharmacological characterization of the H(2)R in these cells is far from being complete. The aim of this study was to provide a comprehensive profiling of the H(2)R in neutrophils and eosinophils. Histamine inhibited O(2)(-) formation in human neutrophils more effectively than in eosinophils. H(2)R agonists mimicked the effects of histamine and H(2)R antagonists blocked the effects of histamine. We noticed multiple discrepancies in the potencies and efficacies of H(2)R agonists with respect to cAMP accumulation and inhibition of O(2)(-) formation in both cell types. There were also differences in the antagonist profiles between cAMP accumulation and inhibition of O(2)(-) formation in neutrophils. Moreover, the pharmacological profile of the recombinant H(2)R did not match the H(2)R profile in native cells. The H(2)R sequence identified in human neutrophils corresponds to the published H(2)R sequence, excluding the exclusive expression of a new H(2)R isoform as explanation for the differences. Very likely, the differences between ligands are explained by the existence of ligand-specific receptor conformations with unique affinities, potencies and efficacies. Thus, our data provide evidence for the notion that the concept of ligand-specific receptor conformations can be extended from recombinant systems to native cells.
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Affiliation(s)
- Till M Reher
- Institute of Pharmacology, Hannover Medical School, D-30625 Hannover, Germany
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Reher TM, Neumann D, Buschauer A, Seifert R. Incomplete activation of human eosinophils via the histamine H4-receptor: Evidence for ligand-specific receptor conformations. Biochem Pharmacol 2012; 84:192-203. [DOI: 10.1016/j.bcp.2012.04.004] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2012] [Revised: 04/02/2012] [Accepted: 04/03/2012] [Indexed: 01/21/2023]
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Neumann D, Beermann S, Mägel L, Jonigk D, Weber-Steffens D, Männel D, Seifert R. Problems associated with the use of commercial and non-commercial antibodies against the histamine H4 receptor. Naunyn Schmiedebergs Arch Pharmacol 2012. [DOI: 10.1007/s00210-012-0766-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [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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Büchler G, Wos-Oxley ML, Smoczek A, Zschemisch NH, Neumann D, Pieper DH, Hedrich HJ, Bleich A. Strain-specific colitis susceptibility in IL10-deficient mice depends on complex gut microbiota-host interactions. Inflamm Bowel Dis 2012; 18:943-54. [PMID: 22238116 DOI: 10.1002/ibd.21895] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/08/2011] [Accepted: 08/17/2011] [Indexed: 12/09/2022]
Abstract
BACKGROUND Colitis susceptibility in Il10(-/-) mice depends on genetic background and microbiota composition. A major genetic locus mediating colitis susceptibility, Cdcs1, was transferred from susceptible C3Bir-Il10(-/-) to resistant B6-Il10(-/-) mice, resulting in susceptible congenic BC-R3-Il10(-/-) mice. The aim of this study was to determine the impact of microbiota on this differential colitis susceptibility using a Helicobacter hepaticus infection model. METHODS Parental C3Bir-Il10(-/-) , B6-Il10(-/-) , and congenic BC-R3-Il10(-/-) mice were inoculated with H. hepaticus and analyzed for inflammation. In parental Il10(-/-) mice, microbiota composition was determined by terminal restriction fragment length polymorphism (T-RFLP) and quantitative polymerase chain reaction (qPCR). RESULTS Most severe inflammation was observed in C3Bir-Il10(-/-) in the cecum, in BC-R3-Il10(-/-) in cecum and colon, and, unexpectedly, in B6-Il10(-/-) in the colon. C3Bir-Il10(-/-) and BC-R3-Il10(-/-) secreted significantly more interferon-gamma (IFNγ) and interleukin (IL)17 than B6-Il10(-/-) . T-RFLP analyses in C3Bir-Il10(-/-) and B6-Il10(-/-) mice revealed 1) a significant impact of H. hepaticus infection on species richness and diversity, and 2) strain differences in microbiota composition only after H. hepaticus infection. qPCR revealed higher numbers of Clostridia leptum and Bacteroides spp. in the cecum of infected C3Bir-Il10(-/-) mice, and Lactobacillus spp. in B6-Il10(-/-) mice. CONCLUSIONS Cdcs1 modifies the response to H. hepaticus infection. However, this infection alone does not reflect the original response to a complex colitogenic biota. H. hepaticus-induced inflammation altered intestinal microbiota in a mouse strain-specific manner. Bacteroides spp. became more abundant in susceptible C3Bir-Il10(-/-) , lactobacilli in B6-Il10(-/-) mice. Therefore, both host immune response and differential compositional changes of microbiota play a role in strain-specific colitis susceptibility in Il10(-/-) mice.
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Affiliation(s)
- Gwen Büchler
- Institute for Laboratory Animal Science and Central Animal Facility, Hannover Medical School, Hannover, Germany
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Vauth M, Möhner D, Beermann S, Seifert R, Neumann D. Histamine via the Histamine H2-Receptor Reduces α-CD3-Induced Interferon-γ Synthesis in Murine CD4+ T Cells in an Indirect Manner. J Interferon Cytokine Res 2012; 32:185-90. [DOI: 10.1089/jir.2011.0082] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022] Open
Affiliation(s)
- Marcus Vauth
- Institute of Pharmacology, Hannover Medical School, Hannover, Germany
| | - Desirée Möhner
- Institute of Pharmacology, Hannover Medical School, Hannover, Germany
| | - Silke Beermann
- Institute of Pharmacology, Hannover Medical School, Hannover, Germany
| | - Roland Seifert
- Institute of Pharmacology, Hannover Medical School, Hannover, Germany
| | - Detlef Neumann
- Institute of Pharmacology, Hannover Medical School, Hannover, Germany
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Beermann S, Seifert R, Neumann D. Commercially available antibodies against human and murine histamine H₄-receptor lack specificity. Naunyn Schmiedebergs Arch Pharmacol 2011; 385:125-35. [PMID: 22071576 DOI: 10.1007/s00210-011-0700-4] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2011] [Accepted: 10/10/2011] [Indexed: 11/29/2022]
Abstract
Antibodies are important tools to detect expression and localization of proteins within the living cell. However, for a series of commercially available antibodies which are supposed to recognize G-protein-coupled receptors (GPCR), lack of specificity has been described. In recent publications, antisera against the histamine H₄-receptor (H₄R), which is a member of the GPCR family, have been used to demonstrate receptor expression. However, a comprehensive characterization of these antisera has not been performed yet. Therefore, the purpose of our study was to evaluate the specificity of three commercially available H₄R antibodies. Sf9 insect cells and HEK293 cells expressing recombinant murine and human H₄R, spleen cells obtained from H₄⁻/⁻ and from wild-type mice, and human CD20⁺ and CD20⁻ peripheral blood cells were analyzed by flow cytometry and Western blot using three commercially available H₄R antibodies. Our results show that all tested H₄R antibodies bind to virtually all cells, independently of the expression of H₄R, thus in an unspecific fashion. Also in Western blot, the H₄R antibodies do not bind to the specified protein. Our data underscore the importance of stringent evaluation of antibodies using valid controls, such as cells of H₄R⁻/⁻ mice, to show true receptor expression and antigen specificity. Improved validation of commercially available antibodies prior to release to the market would avoid time-consuming and expensive validation assays by the user.
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Affiliation(s)
- Silke Beermann
- Institute of Pharmacology, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany
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Zimmermann AS, Burhenne H, Kaever V, Seifert R, Neumann D. Systematic analysis of histamine and N-methylhistamine concentrations in organs from two common laboratory mouse strains: C57Bl/6 and Balb/c. Inflamm Res 2011; 60:1153-9. [PMID: 21912978 DOI: 10.1007/s00011-011-0379-5] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2011] [Revised: 07/13/2011] [Accepted: 08/25/2011] [Indexed: 11/26/2022] Open
Abstract
OBJECTIVE Histamine plays a role in several (patho) physiological processes that are commonly studied in mouse models. However, a systematic quantification of histamine and its metabolite N-methylhistamine in mouse organs has not been reported so far. METHODS Balb/c and C57Bl/6 mice were grouped according to their sex and age. Brains, hearts, lungs, livers, kidneys, stomachs, intestines, thymi, spleens, and lymph nodes were excised, weighed, and homogenized. Histamine and N-methylhistamine were quantified simultaneously by a HPLC-mass spectrometry method. RESULTS In all organs analyzed, histamine and N-methylhistamine were detected; however, with quantitative differences. Histamine was present most abundantly in the stomach, lymph nodes, and thymus. The lowest histamine concentrations were detected in brain, liver, lung, and intestine. In most organs, the histamine concentrations increased age-dependently. Substantial concentrations of N-methylhistamine were detected only in lung, intestine and kidney, while in all other organs it was present only in minor quantities. CONCLUSION HPLC-mass spectrometry is a useful method for the highly sensitive and simultaneous detection of histamine and N-methylhistamine. Histamine is present in virtually all organs, not only in those traditionally associated with histamine-mediated disease. Highest concentrations are found in stomach, lymph node, and thymus; medium concentrations in heart, spleen, and kidney; and lowest concentrations detected in intestine, brain, liver, and lung.
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Affiliation(s)
- Anna Sophie Zimmermann
- Institute of Pharmacology, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany
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