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Immunohistochemical and functional analysis of ectonucleoside triphosphate diphosphohydrolase 1 (CD39) and ecto-5'-nucleotidase (CD73) in pig aortic valves. 2014

Ewa Kaniewska, and Alicja Sielicka, and Padmini Sarathchandra, and Iwona Pelikant-Małecka, and Mariola Olkowicz, and Ewa M Słomińska, and Adrian H Chester, and Magdi H Yacoub, and Ryszad T Smoleński
a Department of Biochemistry , Medical University of Gdansk , Gdansk , Poland.

Extracellular nucleotides control mechanisms such as thrombosis or inflammation that are important in several pathologies, including heart valve disease and calcification. Ectonucleoside triphosphate diphosphohydrolase 1 (eNTPD1, CD39) and ecto-5'-nucleotidase (e5NT, CD73) are ectoenzymes that convert adenosine triphosphate to adenosine diphosphate, adenosine monophosphate and finally to adenosine. Changes in activities of these enzymes influence extracellular nucleotide concentrations and therefore could be involved in valve pathology. This study aimed to analyze type of cells, specific area, level of expression and biochemical function of CD39 and CD73 in pig aortic valves. Samples were collected from aortic valves of domestic pigs. Histological sections were cut from paraffin embedded tissue blocks. Following incubation with primary antibody against CD39 or CD73, washing and secondary goat anti-rabbit secondary antibodies, slides were viewed with NanoZoomer scanner. Substantial expression CD39 and CD73 was observed in two main types of valve cells: endothelial and valve interstitial cells. Subsequently, biochemical function of CD39 and CD73 was evaluated in cells cultured from pig aortic valve. Breakdown of extracellular nucleotides added to cell medium was analyzed with high performance liquid chromatography. In the interstitial cells, the CD73 products formation was much faster than in endothelium, while for the CD39 activity this relation was opposite. Expression and high concentration of CD39 and CD73 products in endothelium are expected, but presence of CD73 in valve interstitial cells is a surprise. We conclude that CD39 and CD73 and their enzymatic activities that convert extracellular nucleotides are highly expressed and could have special function in the valve.

UI MeSH Term Description Entries
D007150 Immunohistochemistry Histochemical localization of immunoreactive substances using labeled antibodies as reagents. Immunocytochemistry,Immunogold Techniques,Immunogold-Silver Techniques,Immunohistocytochemistry,Immunolabeling Techniques,Immunogold Technics,Immunogold-Silver Technics,Immunolabeling Technics,Immunogold Silver Technics,Immunogold Silver Techniques,Immunogold Technic,Immunogold Technique,Immunogold-Silver Technic,Immunogold-Silver Technique,Immunolabeling Technic,Immunolabeling Technique,Technic, Immunogold,Technic, Immunogold-Silver,Technic, Immunolabeling,Technics, Immunogold,Technics, Immunogold-Silver,Technics, Immunolabeling,Technique, Immunogold,Technique, Immunogold-Silver,Technique, Immunolabeling,Techniques, Immunogold,Techniques, Immunogold-Silver,Techniques, Immunolabeling
D005110 Extracellular Space Interstitial space between cells, occupied by INTERSTITIAL FLUID as well as amorphous and fibrous substances. For organisms with a CELL WALL, the extracellular space includes everything outside of the CELL MEMBRANE including the PERIPLASM and the cell wall. Intercellular Space,Extracellular Spaces,Intercellular Spaces,Space, Extracellular,Space, Intercellular,Spaces, Extracellular,Spaces, Intercellular
D000255 Adenosine Triphosphate An adenine nucleotide containing three phosphate groups esterified to the sugar moiety. In addition to its crucial roles in metabolism adenosine triphosphate is a neurotransmitter. ATP,Adenosine Triphosphate, Calcium Salt,Adenosine Triphosphate, Chromium Salt,Adenosine Triphosphate, Magnesium Salt,Adenosine Triphosphate, Manganese Salt,Adenylpyrophosphate,CaATP,CrATP,Manganese Adenosine Triphosphate,MgATP,MnATP,ATP-MgCl2,Adenosine Triphosphate, Chromium Ammonium Salt,Adenosine Triphosphate, Magnesium Chloride,Atriphos,Chromium Adenosine Triphosphate,Cr(H2O)4 ATP,Magnesium Adenosine Triphosphate,Striadyne,ATP MgCl2
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D001021 Aortic Valve The valve between the left ventricle and the ascending aorta which prevents backflow into the left ventricle. Aortic Valves,Valve, Aortic,Valves, Aortic
D001081 Apyrase A calcium-activated enzyme that catalyzes the hydrolysis of ATP to yield AMP and orthophosphate. It can also act on ADP and other nucleoside triphosphates and diphosphates. EC 3.6.1.5. ADPase,ATP-Diphosphatase,Adenosine Diphosphatase,ADP Phosphohydrolase,ATP Diphosphohydrolase,ATP-ADPase,ATP ADPase,ATP Diphosphatase,Diphosphatase, Adenosine,Diphosphohydrolase, ATP,Phosphohydrolase, ADP
D013552 Swine Any of various animals that constitute the family Suidae and comprise stout-bodied, short-legged omnivorous mammals with thick skin, usually covered with coarse bristles, a rather long mobile snout, and small tail. Included are the genera Babyrousa, Phacochoerus (wart hogs), and Sus, the latter containing the domestic pig (see SUS SCROFA). Phacochoerus,Pigs,Suidae,Warthogs,Wart Hogs,Hog, Wart,Hogs, Wart,Wart Hog
D015703 Antigens, CD Differentiation antigens residing on mammalian leukocytes. CD stands for cluster of differentiation, which refers to groups of monoclonal antibodies that show similar reactivity with certain subpopulations of antigens of a particular lineage or differentiation stage. The subpopulations of antigens are also known by the same CD designation. CD Antigen,Cluster of Differentiation Antigen,Cluster of Differentiation Marker,Differentiation Antigens, Leukocyte, Human,Leukocyte Differentiation Antigens, Human,Cluster of Differentiation Antigens,Cluster of Differentiation Markers,Antigen Cluster, Differentiation,Antigen, CD,CD Antigens,Differentiation Antigen Cluster,Differentiation Marker Cluster,Marker Cluster, Differentiation
D015720 5'-Nucleotidase A glycoprotein enzyme present in various organs and in many cells. The enzyme catalyzes the hydrolysis of a 5'-ribonucleotide to a ribonucleoside and orthophosphate in the presence of water. It is cation-dependent and exists in a membrane-bound and soluble form. EC 3.1.3.5. 5'-AMP Nucleotidase,AMP Phosphatase,Adenylate Phosphatase,Antigens, CD73,CD73 Antigens,Cytidylate Phosphatase,Ecto-5'-Nucleotidase,IMP Nucleotidase,IMP Phosphatase,Inosinate Phosphatase,Pyrimidine 5'-Nucleotidase,Thymidine Phosphatase,Uridylate 5'-Nucleotidase,5'-Nucleotidase Phosphoribolase,Antigen, CD73,IMPase,5' AMP Nucleotidase,5' Nucleotidase,5' Nucleotidase Phosphoribolase,CD73 Antigen,Ecto 5' Nucleotidase,Pyrimidine 5' Nucleotidase,Uridylate 5' Nucleotidase
D015971 Gene Expression Regulation, Enzymologic Any of the processes by which nuclear, cytoplasmic, or intercellular factors influence the differential control of gene action in enzyme synthesis. Enzymologic Gene Expression Regulation,Regulation of Gene Expression, Enzymologic,Regulation, Gene Expression, Enzymologic

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