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González DA, Barbieri van Haaster MM, Quinteros Villarruel E, Hattab C, Ostuni MA, Orman B. Salivary extracellular vesicles can modulate purinergic signalling in oral tissues by combined ectonucleoside triphosphate diphosphohydrolases and ecto-5'-nucleotidase activities. Mol Cell Biochem 2019; 463:1-11. [PMID: 31531757 DOI: 10.1007/s11010-019-03624-6] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Accepted: 09/04/2019] [Indexed: 10/26/2022]
Abstract
We reported previously that the rat submandibular gland is able to release nanovesicles capable to hydrolyse millimolar concentrations of ATP, ADP and AMP in vitro. Here, we show that rat saliva also contains nanovesicles with the ability to hydrolyse ATP. Our aim was to identify and characterize vesicular nucleotidases by using kinetic, immunological and in silico approaches. Nucleotidase activity in the absence or presence of specific inhibitors allowed us to assume the participation of NTPDase1, -2 and -3, together with ecto-5'-nucleotidase, confirmed using specific antibodies. At neutral pH, initial ATPase activity would be mostly due to NTPDase2, which was thereafter inactivated, leaving NTPDase1 and NTPDase3 to hydrolyse ATP and ADP with an efficacy ATPase/ADPase around 2. Ecto-5'nucleotidase would be mainly responsible for AMP hydrolysis and adenosine accumulation. We proposed a kinetic model for NTPDase2 as a tool to isolate and analyse the turnover of this enzyme in the presence of different ATP concentrations, including those expected in extracellular media. Our study characterizes the ectonucleotidases carried by extracellular vesicles which contribute to modulate ATP and adenosine concentrations in the oral cavity, essential players in purinergic signalling.
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Affiliation(s)
- Débora A González
- Cátedra de Biofísica y Bioestadística, Facultad de Odontología, Universidad de Buenos Aires, M. T. de Alvear 2142, 1122, Buenos Aires, Argentina.
| | - Martín M Barbieri van Haaster
- Cátedra de Biofísica y Bioestadística, Facultad de Odontología, Universidad de Buenos Aires, M. T. de Alvear 2142, 1122, Buenos Aires, Argentina
| | - Emmanuel Quinteros Villarruel
- Cátedra de Farmacología, Facultad de Odontología, Universidad de Buenos Aires, M. T. de Alvear 2142, 1122, Buenos Aires, Argentina
| | - Claude Hattab
- Université de Paris, Integrated Biology of Red Blood Cell UMR_S1134, INSERM, 75015, Paris, France.,Institut National de la Transfusion Sanguine (INTS), 6 Rue Alexandre Cabanel, 75015, Paris, France
| | - Mariano A Ostuni
- Université de Paris, Integrated Biology of Red Blood Cell UMR_S1134, INSERM, 75015, Paris, France.,Institut National de la Transfusion Sanguine (INTS), 6 Rue Alexandre Cabanel, 75015, Paris, France
| | - Betina Orman
- Cátedra de Farmacología, Facultad de Odontología, Universidad de Buenos Aires, M. T. de Alvear 2142, 1122, Buenos Aires, Argentina
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