Vieira PDB, Silva NLF, Kist LW, Oliveira GMTD, Bogo MR, Carli GAD, Macedo AJ, Tasca T. Iron from haemoglobin and haemin modulates nucleotide hydrolysis in Trichomonas vaginalis.
Mem Inst Oswaldo Cruz 2015;
110:201-8. [PMID:
25946243 PMCID:
PMC4489450 DOI:
10.1590/0074-02760140320]
[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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2014] [Accepted: 01/26/2015] [Indexed: 12/14/2022] Open
Abstract
Extracellular ATP may act as a danger signalling molecule, inducing inflammation and
immune responses in infection sites. The ectonucleotidases NTPDase and
ecto-5’-nucleotidase are enzymes that modulate extracellular nucleotide levels; these
enzymes have been previously characterised in Trichomonas vaginalis.
Iron plays an important role in the complex trichomonal pathogenesis. Herein, the
effects of iron on growth, nucleotide hydrolysis and NTPDase gene expression in
T. vaginalis isolates from female and male patients were
evaluated. Iron from different sources sustained T. vaginalis
growth. Importantly, iron from haemoglobin (HB) and haemin (HM) enhanced NTPDase
activity in isolates from female patients and conversely reduced the enzyme activity
in isolates from male patients. Iron treatments could not alter the NTPDase
transcript levels in T. vaginalis. Furthermore, our results reveal a
distinct ATP, ADP and AMP hydrolysis profile between isolates from female and male
patients influenced by iron from HB and HM. Our data indicate the participation of
NTPDase and ecto-5’-nucleotidase in the establishment of trichomonas infection
through ATP degradation and adenosine production influenced by iron.
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