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Filou S, Zvintzou E, Kalogeropoulou C, Xepapadaki E, Kypreos K. Functional Interaction Between Apolipoproteins A2 And E In The Regulation Of Plasma Cholesterol And Triglycerides Levels. Atherosclerosis 2019. [DOI: 10.1016/j.atherosclerosis.2019.06.308] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Zvintzou E, Xepapadaki E, Kalogeropoulou C, Filou S, Kypreos K. Apolipoprotein A2 Induces Structural Changes In Hdl Leading To Increased Antioxidant Activity. Atherosclerosis 2019. [DOI: 10.1016/j.atherosclerosis.2019.06.690] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Maulucci G, Cohen O, Daniel B, Sansone A, Petropoulou PI, Filou S, Spyridonidis A, Pani G, De Spirito M, Chatgilialoglu C, Ferreri C, Kypreos KE, Sasson S. Fatty acid-related modulations of membrane fluidity in cells: detection and implications. Free Radic Res 2016; 50:S40-S50. [PMID: 27593084 DOI: 10.1080/10715762.2016.1231403] [Citation(s) in RCA: 69] [Impact Index Per Article: 8.6] [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: 01/15/2023]
Abstract
Metabolic homeostasis of fatty acids is complex and well-regulated in all organisms. The biosynthesis of saturated fatty acids (SFA) in mammals provides substrates for β-oxidation and ATP production. Monounsaturated fatty acids (MUFA) are products of desaturases that introduce a methylene group in cis geometry in SFA. Polyunsaturated fatty acids (n-6 and n-3 PUFA) are products of elongation and desaturation of the essential linoleic acid and α-linolenic acid, respectively. The liver processes dietary fatty acids and exports them in lipoproteins for distribution and storage in peripheral tissues. The three types of fatty acids are integrated in membrane phospholipids and determine their biophysical properties and functions. This study was aimed at investigating effects of fatty acids on membrane biophysical properties under varying nutritional and pathological conditions, by integrating lipidomic analysis of membrane phospholipids with functional two-photon microscopy (fTPM) of cellular membranes. This approach was applied to two case studies: first, pancreatic beta-cells, to investigate hormetic and detrimental effects of lipids. Second, red blood cells extracted from a genetic mouse model defective in lipoproteins, to understand the role of lipids in hepatic diseases and metabolic syndrome and their effect on circulating cells.
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Affiliation(s)
- G Maulucci
- a Institute of Physics, Università Cattolica del Sacro Cuore , Roma , Italy
| | - O Cohen
- b Institute for Drug Research, Section of Pharmacology, Diabetes Research Unit, Faculty of Medicine , The Hebrew University , Jerusalem , Israel
| | - B Daniel
- b Institute for Drug Research, Section of Pharmacology, Diabetes Research Unit, Faculty of Medicine , The Hebrew University , Jerusalem , Israel
| | - A Sansone
- c ISOF, BioFreeRadicals Group, Consiglio Nazionale delle Ricerche , Bologna , Italy
| | - P I Petropoulou
- d Department of Pharmacology , University of Patras Medical School , Rio , Greece
| | - S Filou
- d Department of Pharmacology , University of Patras Medical School , Rio , Greece
| | - A Spyridonidis
- e Hematology Department , University of Patras Medical School , Rio , Greece
| | - G Pani
- f Institute of General Pathology, Università Cattolica del Sacro Cuore , Roma , Italy
| | - M De Spirito
- a Institute of Physics, Università Cattolica del Sacro Cuore , Roma , Italy
| | - C Chatgilialoglu
- c ISOF, BioFreeRadicals Group, Consiglio Nazionale delle Ricerche , Bologna , Italy
| | - C Ferreri
- c ISOF, BioFreeRadicals Group, Consiglio Nazionale delle Ricerche , Bologna , Italy
| | - K E Kypreos
- d Department of Pharmacology , University of Patras Medical School , Rio , Greece
| | - S Sasson
- b Institute for Drug Research, Section of Pharmacology, Diabetes Research Unit, Faculty of Medicine , The Hebrew University , Jerusalem , Israel
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Filou S, Karavia E, Constantinou C, Zvintzou E, Kypreos K. Functional differences between apolipoprotein E- and apolipoprotein A-I- containing HDL particles. Atherosclerosis 2016. [DOI: 10.1016/j.atherosclerosis.2016.07.583] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Panogeorgou T, Tserbini E, Filou S, Vynios DH, Naxakis SS, Papadas TA, Goumas PD, Mastronikolis NS. Hyaluronan synthases and hyaluronidases in nasal polyps. Eur Arch Otorhinolaryngol 2015; 273:1801-8. [PMID: 26661071 DOI: 10.1007/s00405-015-3848-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [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: 09/25/2015] [Accepted: 11/28/2015] [Indexed: 11/25/2022]
Abstract
Nasal polyps (NPs) are benign lesions of nasal and paranasal sinuses mucosa affecting 1-4 % of all adults. Nasal polyposis affects the quality of patient's life as it causes nasal obstruction, postnasal drainage, purulent nasal discharge, hyposmia or anosmia, chronic sinusitis, facial pain and snoring. Without treatment, the disease can alter the craniofacial skeleton in cases of extended growth of polyps. The development of NPs is caused by the hyperplasia of nasal or paranasal sinuses mucosa, and edema of extracellular matrix. This is usually the result of high concentration of high molecular mass hyaluronan (HA) which is either overproduced or accumulated from blood supply. The size of HA presents high diversity and, especially in pathologic conditions, chains of low molecular mass can be observed. In NPs, chains of about 200 kDa have been identified and considered to be responsible for the inflammation. The purpose of the present study was the investigation, in NPs and normal nasal mucosa (NM), of the expression of the wild-type and alternatively spliced forms of hyaluronidases, their immunolocalization, and the expression of HA synthases to examine the isoform(s) responsible for the increased amounts of HA in NPs. Hyaluronidases' presence was examined on mRNA (RT-PCR analysis) and protein (immunohistochemistry) levels. Hyaluronan synthases' presence was examined on mRNA levels. Hyaluronidases were localized in the cytoplasm of epithelial and inflammatory cells, as well as in the matrix. On mRNA level, it was found that hyal-1-wt was decreased in NPs compared to NM and hyal-1-v3, -v4 and -v5 were substantially increased. Moreover, HAS2 and HAS3 were the only hyaluronan synthases detected, the expression of which was almost similar in NPs and NM. Overall, the results of the present study support that hyaluronidases are the main enzymes responsible for the decreased size of hyaluronan observed in NPs; thus they behave as inflammatory agents. Therefore, they could be a potential target for the design of a more advanced treatment for nasal polyposis.
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Affiliation(s)
- T Panogeorgou
- Department of Otorhinolaryngology-Head and Neck Surgery, University Hospital of Patras, University of Patras Medical School, 26500, Patras, Greece.
| | - E Tserbini
- Biochemistry, Biochemical Analysis and Matrix Pathobiology Research Group, Laboratory of Biochemistry, Department of Chemistry, University of Patras, 26500, Patras, Greece
| | - S Filou
- Biochemistry, Biochemical Analysis and Matrix Pathobiology Research Group, Laboratory of Biochemistry, Department of Chemistry, University of Patras, 26500, Patras, Greece
| | - D H Vynios
- Biochemistry, Biochemical Analysis and Matrix Pathobiology Research Group, Laboratory of Biochemistry, Department of Chemistry, University of Patras, 26500, Patras, Greece
| | - S S Naxakis
- Department of Otorhinolaryngology-Head and Neck Surgery, University Hospital of Patras, University of Patras Medical School, 26500, Patras, Greece
| | - T A Papadas
- Department of Otorhinolaryngology-Head and Neck Surgery, University Hospital of Patras, University of Patras Medical School, 26500, Patras, Greece
| | - P D Goumas
- Department of Otorhinolaryngology-Head and Neck Surgery, University Hospital of Patras, University of Patras Medical School, 26500, Patras, Greece
| | - N S Mastronikolis
- Department of Otorhinolaryngology-Head and Neck Surgery, University Hospital of Patras, University of Patras Medical School, 26500, Patras, Greece
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