Extracellular Nucleotide Catabolism in Aortoiliac Bifurcation of Atherosclerotic ApoE/LDLr Double Knock Out Mice |
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| Authors: | Barbara Kutryb-Zajac Paulina Zukowska Marta Toczek Magdalena Zabielska Marcin Lipinski Iwona Rybakowska |
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| Institution: | 1. Department of Biochemistry, Medical University of Gdansk, Gdansk, Poland;2. Department of Pharmaceutical Biochemistry, Medical University of Gdansk, Gdansk, Poland;3. Department of Biochemistry and Clinical Physiology, Medical University of Gdansk, Gdansk, Poland |
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| Abstract: | Atherosclerosis is a consequence of diverse pathologies that could be affected by signaling mediated by nucleotides and their metabolites. Concentration of specific nucleotide derivatives in the proximity of purinergic receptors is controlled by extracellular enzymes such as ecto-nucleoside triphopsphate diphosphohydrolase (eNTPD), ecto-5′-nucleotidase (e5NT), and ecto-adenosine deaminase (eADA). To estimate changes in metabolism of extracellular nucleotides in the atherosclerotic vessel wall, aortoiliac bifurcation of ApoE/LDLr (–/–) mice was perfused with solution containing adenosine-5′-triphosphate (ATP), adenosine-5′-monophosphate (AMP) or adenosine. Formation of the product of eNTPD, e5NT or eADA was measured by high performance liquid chromatography (HPLC). The most significant difference between ApoE/LDLr (–/–) and wild-type mice was several times higher rate of conversion of adenosine to inosine catalyzed by eADA activity. This highlights potential decrease in intravascular adenosine concentration in atherosclerosis. |
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| Keywords: | Nucleotides ecto-nucleoside triphopsphate diphosphohydrolase ecto-5′-nucleotidase adenosine deaminase adenosine atherosclerosis inflammation |
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