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Fu J, Guo Q, Feng Y, Cheng P, Wu A. Dual role of fucosidase in cancers and its clinical potential. J Cancer 2022; 13:3121-3132. [PMID: 36046653 PMCID: PMC9414016 DOI: 10.7150/jca.75840] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Accepted: 07/28/2022] [Indexed: 12/02/2022] Open
Abstract
Glycosidases and glycosyltransferases greatly impact malignant phenotype of tumors though genetics and epigenetics mechanisms. As the member of glycoside hydrolase (GH) families 29A, α-L-fucosidases (AFUs) are involved in the hydrolysis of terminal L-fucose residues linked via α-1,2, α-1,3, α-1,4 or α-1,6 to the reducing end of N-acetyl glucosamine (GlcNAc) of oligosaccharide chains. The defucosylation process mediated by AFUs contributes to the development of various diseases, such as chronic inflammatory diseases, immune disorders, and autoimmune diseases by reducing the interaction between fucosylated adhesion molecules supporting leukocyte extravasation. AFUs also impair crucial cell-extracellular matrix (ECM) interactions and presumably subsequent cell signaling pathways, which lead to changes in tumor function and behavior. There are two isoforms of AFUs in human, namely α-L-fucosidase 1 (FUCA1) and α-L-fucosidase 2 (FUCA2), respectively. FUCA1 is a p53 target gene and can hydrolyze different fucosylation sites on epidermal growth factor receptor (EGFR), thereby determining the activation of EGFR. FUCA2 mediates the adhesion between Helicobacter pylori and gastric mucosa and is upregulated in 24 tumor types. Besides, based on the participation of AFU in signaling pathways and tumor progression, we discuss the prospect of AFU as a therapeutic target.
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Affiliation(s)
- Jinxing Fu
- Department of Neurosurgery, The First Hospital of China Medical University, Shenyang, China
| | - Qing Guo
- Department of Neurosurgery, The First Hospital of China Medical University, Shenyang, China
| | - Yuan Feng
- Department of Neurosurgery, The First Hospital of China Medical University, Shenyang, China
| | - Peng Cheng
- Department of Neurosurgery, The First Hospital of China Medical University, Shenyang, China
| | - Anhua Wu
- Department of Neurosurgery, The First Hospital of China Medical University, Shenyang, China
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2
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Xu Y, Man N, Karl D, Martinez C, Liu F, Sun J, Martinez CJ, Martin GM, Beckedorff F, Lai F, Yue J, Roisman A, Greenblatt S, Duffort S, Wang L, Sun X, Figueroa M, Shiekhattar R, Nimer S. TAF1 plays a critical role in AML1-ETO driven leukemogenesis. Nat Commun 2019. [PMID: 31664040 DOI: 10.1038/s41467-019-12735-z.pmid:31664040;pmcid:pmc6820555] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023] Open
Abstract
AML1-ETO (AE) is a fusion transcription factor, generated by the t(8;21) translocation, that functions as a leukemia promoting oncogene. Here, we demonstrate that TATA-Box Binding Protein Associated Factor 1 (TAF1) associates with K43 acetylated AE and this association plays a pivotal role in the proliferation of AE-expressing acute myeloid leukemia (AML) cells. ChIP-sequencing indicates significant overlap of the TAF1 and AE binding sites. Knockdown of TAF1 alters the association of AE with chromatin, affecting of the expression of genes that are activated or repressed by AE. Furthermore, TAF1 is required for leukemic cell self-renewal and its reduction promotes the differentiation and apoptosis of AE+ AML cells, thereby impairing AE driven leukemogenesis. Together, our findings reveal a role of TAF1 in leukemogenesis and identify TAF1 as a potential therapeutic target for AE-expressing leukemia.
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Affiliation(s)
- Ye Xu
- Sylvester Comprehensive Cancer Center, University of Miami, 1120 NW 14th St, Miami, FL, 33136, USA.,Department of Medicine, Miller School of Medicine, University of Miami, 1120 NW 14th St, Miami, FL, 33136, USA
| | - Na Man
- Sylvester Comprehensive Cancer Center, University of Miami, 1120 NW 14th St, Miami, FL, 33136, USA.,Department of Biochemistry and Molecular Biology, Miller School of Medicine, University of Miami, 1501 NW 10th Ave, Miami, FL, 33136, USA
| | - Daniel Karl
- Sylvester Comprehensive Cancer Center, University of Miami, 1120 NW 14th St, Miami, FL, 33136, USA.,Department of Biochemistry and Molecular Biology, Miller School of Medicine, University of Miami, 1501 NW 10th Ave, Miami, FL, 33136, USA
| | - Concepcion Martinez
- Sylvester Comprehensive Cancer Center, University of Miami, 1120 NW 14th St, Miami, FL, 33136, USA.,Department of Biochemistry and Molecular Biology, Miller School of Medicine, University of Miami, 1501 NW 10th Ave, Miami, FL, 33136, USA
| | - Fan Liu
- Sylvester Comprehensive Cancer Center, University of Miami, 1120 NW 14th St, Miami, FL, 33136, USA.,Department of Biochemistry and Molecular Biology, Miller School of Medicine, University of Miami, 1501 NW 10th Ave, Miami, FL, 33136, USA
| | - Jun Sun
- Sylvester Comprehensive Cancer Center, University of Miami, 1120 NW 14th St, Miami, FL, 33136, USA.,Department of Biochemistry and Molecular Biology, Miller School of Medicine, University of Miami, 1501 NW 10th Ave, Miami, FL, 33136, USA
| | - Camilo Jose Martinez
- Sylvester Comprehensive Cancer Center, University of Miami, 1120 NW 14th St, Miami, FL, 33136, USA.,Department of Biochemistry and Molecular Biology, Miller School of Medicine, University of Miami, 1501 NW 10th Ave, Miami, FL, 33136, USA
| | - Gloria Mas Martin
- Sylvester Comprehensive Cancer Center, University of Miami, 1120 NW 14th St, Miami, FL, 33136, USA.,Department of Biochemistry and Molecular Biology, Miller School of Medicine, University of Miami, 1501 NW 10th Ave, Miami, FL, 33136, USA
| | - Felipe Beckedorff
- Sylvester Comprehensive Cancer Center, University of Miami, 1120 NW 14th St, Miami, FL, 33136, USA.,Department of Human Genetics, Miller School of Medicine, University of Miami, 1120 NW 14th St, Miami, FL, 33136, USA
| | - Fan Lai
- Sylvester Comprehensive Cancer Center, University of Miami, 1120 NW 14th St, Miami, FL, 33136, USA.,Department of Human Genetics, Miller School of Medicine, University of Miami, 1120 NW 14th St, Miami, FL, 33136, USA
| | - Jingyin Yue
- Sylvester Comprehensive Cancer Center, University of Miami, 1120 NW 14th St, Miami, FL, 33136, USA.,Department of Human Genetics, Miller School of Medicine, University of Miami, 1120 NW 14th St, Miami, FL, 33136, USA
| | - Alejandro Roisman
- Sylvester Comprehensive Cancer Center, University of Miami, 1120 NW 14th St, Miami, FL, 33136, USA.,Department of Human Genetics, Miller School of Medicine, University of Miami, 1120 NW 14th St, Miami, FL, 33136, USA
| | - Sarah Greenblatt
- Sylvester Comprehensive Cancer Center, University of Miami, 1120 NW 14th St, Miami, FL, 33136, USA.,Department of Biochemistry and Molecular Biology, Miller School of Medicine, University of Miami, 1501 NW 10th Ave, Miami, FL, 33136, USA
| | - Stephanie Duffort
- Department of Medicine, Miller School of Medicine, University of Miami, 1120 NW 14th St, Miami, FL, 33136, USA
| | - Lan Wang
- Sylvester Comprehensive Cancer Center, University of Miami, 1120 NW 14th St, Miami, FL, 33136, USA.,Department of Biochemistry and Molecular Biology, Miller School of Medicine, University of Miami, 1501 NW 10th Ave, Miami, FL, 33136, USA.,Institute of Health Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xiaojian Sun
- Sylvester Comprehensive Cancer Center, University of Miami, 1120 NW 14th St, Miami, FL, 33136, USA.,Department of Biochemistry and Molecular Biology, Miller School of Medicine, University of Miami, 1501 NW 10th Ave, Miami, FL, 33136, USA.,State Key Laboratory of Medical Genomics, Shanghai Institute of Hematology, Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Maria Figueroa
- Sylvester Comprehensive Cancer Center, University of Miami, 1120 NW 14th St, Miami, FL, 33136, USA.,Department of Human Genetics, Miller School of Medicine, University of Miami, 1120 NW 14th St, Miami, FL, 33136, USA
| | - Ramin Shiekhattar
- Sylvester Comprehensive Cancer Center, University of Miami, 1120 NW 14th St, Miami, FL, 33136, USA.,Department of Human Genetics, Miller School of Medicine, University of Miami, 1120 NW 14th St, Miami, FL, 33136, USA
| | - Stephen Nimer
- Sylvester Comprehensive Cancer Center, University of Miami, 1120 NW 14th St, Miami, FL, 33136, USA. .,Department of Medicine, Miller School of Medicine, University of Miami, 1120 NW 14th St, Miami, FL, 33136, USA. .,Department of Biochemistry and Molecular Biology, Miller School of Medicine, University of Miami, 1501 NW 10th Ave, Miami, FL, 33136, USA.
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3
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Xu Y, Man N, Karl D, Martinez C, Liu F, Sun J, Martinez CJ, Martin GM, Beckedorff F, Lai F, Yue J, Roisman A, Greenblatt S, Duffort S, Wang L, Sun X, Figueroa M, Shiekhattar R, Nimer S. TAF1 plays a critical role in AML1-ETO driven leukemogenesis. Nat Commun 2019; 10:4925. [PMID: 31664040 PMCID: PMC6820555 DOI: 10.1038/s41467-019-12735-z] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Accepted: 09/26/2019] [Indexed: 12/11/2022] Open
Abstract
AML1-ETO (AE) is a fusion transcription factor, generated by the t(8;21) translocation, that functions as a leukemia promoting oncogene. Here, we demonstrate that TATA-Box Binding Protein Associated Factor 1 (TAF1) associates with K43 acetylated AE and this association plays a pivotal role in the proliferation of AE-expressing acute myeloid leukemia (AML) cells. ChIP-sequencing indicates significant overlap of the TAF1 and AE binding sites. Knockdown of TAF1 alters the association of AE with chromatin, affecting of the expression of genes that are activated or repressed by AE. Furthermore, TAF1 is required for leukemic cell self-renewal and its reduction promotes the differentiation and apoptosis of AE+ AML cells, thereby impairing AE driven leukemogenesis. Together, our findings reveal a role of TAF1 in leukemogenesis and identify TAF1 as a potential therapeutic target for AE-expressing leukemia. AML1-ETO is a fusion protein in which acetylation of lysine-43 is critical to leukemogenesis. Here, they show that TAF1 is required for AML1-ETO mediated gene expression such that it binds to acetylated AML1-ETO to facilitate the association of AML1-ETO with chromatin, and consequently, promotes leukemic self-renewal.
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Affiliation(s)
- Ye Xu
- Sylvester Comprehensive Cancer Center, University of Miami, 1120 NW 14th St, Miami, FL, 33136, USA.,Department of Medicine, Miller School of Medicine, University of Miami, 1120 NW 14th St, Miami, FL, 33136, USA
| | - Na Man
- Sylvester Comprehensive Cancer Center, University of Miami, 1120 NW 14th St, Miami, FL, 33136, USA.,Department of Biochemistry and Molecular Biology, Miller School of Medicine, University of Miami, 1501 NW 10th Ave, Miami, FL, 33136, USA
| | - Daniel Karl
- Sylvester Comprehensive Cancer Center, University of Miami, 1120 NW 14th St, Miami, FL, 33136, USA.,Department of Biochemistry and Molecular Biology, Miller School of Medicine, University of Miami, 1501 NW 10th Ave, Miami, FL, 33136, USA
| | - Concepcion Martinez
- Sylvester Comprehensive Cancer Center, University of Miami, 1120 NW 14th St, Miami, FL, 33136, USA.,Department of Biochemistry and Molecular Biology, Miller School of Medicine, University of Miami, 1501 NW 10th Ave, Miami, FL, 33136, USA
| | - Fan Liu
- Sylvester Comprehensive Cancer Center, University of Miami, 1120 NW 14th St, Miami, FL, 33136, USA.,Department of Biochemistry and Molecular Biology, Miller School of Medicine, University of Miami, 1501 NW 10th Ave, Miami, FL, 33136, USA
| | - Jun Sun
- Sylvester Comprehensive Cancer Center, University of Miami, 1120 NW 14th St, Miami, FL, 33136, USA.,Department of Biochemistry and Molecular Biology, Miller School of Medicine, University of Miami, 1501 NW 10th Ave, Miami, FL, 33136, USA
| | - Camilo Jose Martinez
- Sylvester Comprehensive Cancer Center, University of Miami, 1120 NW 14th St, Miami, FL, 33136, USA.,Department of Biochemistry and Molecular Biology, Miller School of Medicine, University of Miami, 1501 NW 10th Ave, Miami, FL, 33136, USA
| | - Gloria Mas Martin
- Sylvester Comprehensive Cancer Center, University of Miami, 1120 NW 14th St, Miami, FL, 33136, USA.,Department of Biochemistry and Molecular Biology, Miller School of Medicine, University of Miami, 1501 NW 10th Ave, Miami, FL, 33136, USA
| | - Felipe Beckedorff
- Sylvester Comprehensive Cancer Center, University of Miami, 1120 NW 14th St, Miami, FL, 33136, USA.,Department of Human Genetics, Miller School of Medicine, University of Miami, 1120 NW 14th St, Miami, FL, 33136, USA
| | - Fan Lai
- Sylvester Comprehensive Cancer Center, University of Miami, 1120 NW 14th St, Miami, FL, 33136, USA.,Department of Human Genetics, Miller School of Medicine, University of Miami, 1120 NW 14th St, Miami, FL, 33136, USA
| | - Jingyin Yue
- Sylvester Comprehensive Cancer Center, University of Miami, 1120 NW 14th St, Miami, FL, 33136, USA.,Department of Human Genetics, Miller School of Medicine, University of Miami, 1120 NW 14th St, Miami, FL, 33136, USA
| | - Alejandro Roisman
- Sylvester Comprehensive Cancer Center, University of Miami, 1120 NW 14th St, Miami, FL, 33136, USA.,Department of Human Genetics, Miller School of Medicine, University of Miami, 1120 NW 14th St, Miami, FL, 33136, USA
| | - Sarah Greenblatt
- Sylvester Comprehensive Cancer Center, University of Miami, 1120 NW 14th St, Miami, FL, 33136, USA.,Department of Biochemistry and Molecular Biology, Miller School of Medicine, University of Miami, 1501 NW 10th Ave, Miami, FL, 33136, USA
| | - Stephanie Duffort
- Department of Medicine, Miller School of Medicine, University of Miami, 1120 NW 14th St, Miami, FL, 33136, USA
| | - Lan Wang
- Sylvester Comprehensive Cancer Center, University of Miami, 1120 NW 14th St, Miami, FL, 33136, USA.,Department of Biochemistry and Molecular Biology, Miller School of Medicine, University of Miami, 1501 NW 10th Ave, Miami, FL, 33136, USA.,Institute of Health Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xiaojian Sun
- Sylvester Comprehensive Cancer Center, University of Miami, 1120 NW 14th St, Miami, FL, 33136, USA.,Department of Biochemistry and Molecular Biology, Miller School of Medicine, University of Miami, 1501 NW 10th Ave, Miami, FL, 33136, USA.,State Key Laboratory of Medical Genomics, Shanghai Institute of Hematology, Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Maria Figueroa
- Sylvester Comprehensive Cancer Center, University of Miami, 1120 NW 14th St, Miami, FL, 33136, USA.,Department of Human Genetics, Miller School of Medicine, University of Miami, 1120 NW 14th St, Miami, FL, 33136, USA
| | - Ramin Shiekhattar
- Sylvester Comprehensive Cancer Center, University of Miami, 1120 NW 14th St, Miami, FL, 33136, USA.,Department of Human Genetics, Miller School of Medicine, University of Miami, 1120 NW 14th St, Miami, FL, 33136, USA
| | - Stephen Nimer
- Sylvester Comprehensive Cancer Center, University of Miami, 1120 NW 14th St, Miami, FL, 33136, USA. .,Department of Medicine, Miller School of Medicine, University of Miami, 1120 NW 14th St, Miami, FL, 33136, USA. .,Department of Biochemistry and Molecular Biology, Miller School of Medicine, University of Miami, 1501 NW 10th Ave, Miami, FL, 33136, USA.
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4
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Methods to Discriminate the Distribution of Acidic Glycohydrolases Between the Endosomal–Lysosomal Systems and the Plasma Membrane. Methods Enzymol 2014. [DOI: 10.1016/b978-0-12-397926-1.00002-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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5
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Magini A, Polchi A, Urbanelli L, Cesselli D, Beltrami A, Tancini B, Emiliani C. TFEB activation promotes the recruitment of lysosomal glycohydrolases β-hexosaminidase and β-galactosidase to the plasma membrane. Biochem Biophys Res Commun 2013; 440:251-7. [DOI: 10.1016/j.bbrc.2013.09.060] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2013] [Accepted: 09/11/2013] [Indexed: 12/17/2022]
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6
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Katsanos GS, Anogianaki A, Castellani ML, Ciampoli C, De Amicis D, Orso C, Pollice R, Vecchiet J, Tetè S, Salini V, Caraffa A, Patruno A, Shaik YB, Kempuraj D, Doyle R, Antinolfi PL, Cerulli G, Conti CM, Fulcheri M, Neri G, Sabatino G. Biology of neurotensin: revisited study. Int J Immunopathol Pharmacol 2008; 21:255-9. [PMID: 18547468 DOI: 10.1177/039463200802100201] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The tridecapeptide neurotensin (NT) acts in the mammalian brain as a primary neurotransmitter or neuromodulator of classical neurotransmitters. Morphological and functional in vitro and in vivo studies have demonstrated the existence of close interactions between NT and dopamine both in limbic and in striatal brain regions. Additionally, biochemical and neurochemical evidence indicates that in these brain regions NT also plays a crucial role in the regulation of the aminoacidergic signalling. Immune cells, such as lymphocytes, macrophages and mast cells are reported to be activated by neuropeptides, such as neurotensin; this activation leads to cytokine and immunoglobulin production. In addition, neurotensin increases calcium level and the production of nitric oxide. Therefore neurotensin is deeply involved in immunity and inflammation but its real function still remains to be elucidated.
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Affiliation(s)
- G S Katsanos
- Aristotle University of Thessaloniki, Thessaloniki, Greece
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7
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Papakonstantinou P, Tziris N, Kesisoglou I, Gotzamani-Psarrakou A, Tsonidis C, Patsikas M, Papazoglou L. Impact of Porcine Orexin a on Glucagon Plasma Concentrations in Pigs. Int J Immunopathol Pharmacol 2008; 21:527-38. [DOI: 10.1177/039463200802100306] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
In 1998, Orexin A was added to the long list of orexigenic neuropeptides of the brain's physiology. Orexin A is involved in the central control of appetite and in energy homeostasis, as well as in the regulation of many other physiological functions. It is produced by a small cluster of the brain's neurons, located mainly in and around the lateral hypothalamic area. This site is known to be involved in regulating feeding in mammals. An intracerebroventricular injection of Orexin A into the rat's brain causes an impressive increase in the consumption of food, while an intravenous injection induces changes on glucagon plasma concentrations in rats. In addition, there are signs of changes on glucagon plasma concentrations when Orexin A acts on individual pancreatic islets of rats. In this study, we investigated the potential effects of the central administration of porcine Orexin A on glucagon plasma concentrations in pigs, and examined whether these changes are associated with the possible effect of the neuropeptide on the enteroinsular axis.
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Affiliation(s)
| | | | - I. Kesisoglou
- Department of Nuclear Medicine, Aristotle University of Thessaloniki, Thessaloniki, Macedonia, Greece
| | - A. Gotzamani-Psarrakou
- 2nd Neurosurgical Clinic A. U. T., Aristotle University of Thessaloniki, Thessaloniki, Macedonia, Greece
| | - Chr. Tsonidis
- Department of Clinical Sciences, Faculty of Veterinary Medicine, Aristotle University of Thessaloniki, Thessaloniki, Macedonia, Greece
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Katsanos G, Anogeianaki A, Orso C, Tetè S, Salini V, Antinolfi P, Sabatino G. Substance P: An Inflammatory Peptide. EUR J INFLAMM 2008. [DOI: 10.1177/1721727x0800600202] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Substance P (SP) is involved in neurogenic inflammation and in the pathogenesis of several inflammatory diseases, demonstrating that there is a narrow interrelationship between the nervous system and immunity. Macrophage functions are altered in stress, therefore, since SP is a macrophage activator, its biological effect has been intimately linked to stress. In fact, SP enhances LPS-induced macrophage TNFα production from stressed animals and stimulates the production of IL-8 CXC chemokine response in a mast cell line in vitro. The stress-induced cytokines from macrophage also alter and contribute to inflammation. Understanding the pathophysiology of inflammation and the role of the chemical mediator SP may improve inflammation management.
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Affiliation(s)
| | | | - C. Orso
- Orthopaedic Division, University of Chieti-Pescara, Chieti
| | - S. Tetè
- Dental School, University of Chieti-Pescara, Chieti
| | - V. Salini
- Orthopaedic Division, University of Chieti-Pescara, Chieti
| | | | - G. Sabatino
- Paediatric Division, University of Chieti-Pescara, Chieti, Italy
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10
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Anogianaki A, Castellani ML, Madhappan B, Salini V, Vecchiet J, Tetè S, Frydas S, Perrella A, De Lutiis MA, Neri G, Cerulli G, Caraffa A, Conti P. RANTES (CCL5) potentiates calcium ionophore in the production of LTB4 in rat adherent macrophages from granuloma induced by KMnO4: inhibiton by NDGA. Pharmacol Res 2007; 57:49-55. [PMID: 18083043 DOI: 10.1016/j.phrs.2007.11.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/12/2007] [Revised: 10/30/2007] [Accepted: 11/02/2007] [Indexed: 02/08/2023]
Abstract
The activation of monocytes/macrophages by several stimuli is an initial event in the inflammatory response. To ascertain the importance of LTB(4) and 5-lypoxigenase in the inflammatory site, we isolated and stimulated rat adherent granuloma macrophages (RAGMs) with calcium ionophore in the presence or absence of regulated on activation, normal T expressed and secreted (RANTES) [CCL5] at different concentrations. We tested the hypothesis that RANTES may influence the production of LTB(4) stimulated by calcium ionophore A23187 (2.5 microM/ml) in rat adherent granuloma macrophages derived from granuloma induced by potassium permanganate diluted 1:40 saturated solution. To test this hypothesis, we measured LTB(4) production, in rat granuloma macrophages stimulated with A23187 (2.5 microM) alone and in combination with RANTES at different concentrations. In these studies, the cell-free supernatant of stimulated RAGMs with the ionophore A23187, resulted in a drastic increase of LTB(4). However, when the cells were treated with the combination RANTES plus A23187 the stimulatory effect was more pronounced than A23187 alone. LTB(4) production was quantitated. The calcium ionophore A23187 directly induced LTB(4) in macrophages, this production was markedly enhanced when the cells were pretreated with RANTES. However, the addition of RANTES in the absence of calcium ionophore A23187 did not directly induce LTB(4) release, nor was lypoxigenase expression augmented. Preincubation of RAGMs with NDGA (nordihydroguiaretic acid) (10(-5)M) completely abolished the production of LTB4 on RAGMSs challenged with A23187 in combination with RANTES or A23187 alone in the supernatants. Similar effects were obtained when the cells were pretreated with dexamethasone. These data suggest, for the first time, that RANTES may stimulate the release of LTB(4), only when it is associated to other stimuli and for this reason we conclude that RANTES modulates inflammatory diseases, and may require other stimuli to be effective in amplifying its spectrum of action(s).
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Affiliation(s)
- A Anogianaki
- Laboratory of Experimental Physiology, Aristotle University of Thessaloniki, Greece
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Papakonstantinou P, Tziris N, Kesisoglou I, Gotzamani-Psarrakou A, Tsonidis C, Patsikas M, Papazoglou L. The Effect of Porcine Orexin a on C-Peptide Plasma Concentrations in Pigs. EUR J INFLAMM 2007. [DOI: 10.1177/1721727x0700500303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The hypothalamus and the neuropeptides that are produced and act within its neuronal circuits constitute an area of extensive laboratory research. In 1998, the neuropeptide, Orexin A, was discovered and isolated from the hypothalamus of the rat. An i.c.v. injection of Orexin A into the lateral ventricle of the rat's brain causes an increase in the consumption of food, and, apart from appetite, it also seems to be regulating many other normal functions of the organism, whose regulatory and metabolic mechanisms remain unknown to date. The neuropeptide is produced by a small cluster located in and round the lateral hypothalamic area. It has been known for decades that this area is involved in the regulation of feeding and energy homeostasis in mammals. The intravenous, subcutaneous, or i.c.v. injection of Orexin A causes changes in insulin and glucagon concentrations. The same effect is also seen under in vitro experimental conditions. In this study, we investigated the potential effects of i.c.v. administration of porcine Orexin A on c-peptide concentrations in the peripheral blood of pigs, and tested whether these changes are associated with the potential effect of the neuropeptide on the function of the pancreas.
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Affiliation(s)
| | | | - I. Kesisoglou
- 3rd Surgical Clinic, Aristotle University of Thessaloniki, Macedonia, Thessaloniki, Greece
| | - A. Gotzamani-Psarrakou
- Department of Nuclear Medicine, Aristotle University of Thessaloniki, Macedonia, Thessaloniki, Greece
| | - C. Tsonidis
- 2nd Neurosurgical Clinic A. U. T., Aristotle University of Thessaloniki, Macedonia, Thessaloniki, Greece
| | | | - L.G. Papazoglou
- Department of Clinical Sciences, Faculty of Veterinary Medicine, Aristotle University of Thessaloniki, Macedonia, Thessaloniki, Greece
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