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• W1969637288 abstract "P2X(7) is a channel receptor gated by adenosine triphosphate (ATP) that is involved in the killing of intracellular mycobacteria. To explore further the role of P2X(7) in immunity against Mycobacterium tuberculosis, we studied its expression and function in 19 patients with pulmonary tuberculosis (TB) and 19 healthy contacts. Flow cytometry analysis showed a similar and variable expression of P2X(7) in TB patients and healthy subjects. In contrast, P2X(7) mARN levels were significantly higher in TB patients. When the function of the P2X(7) receptor in peripheral blood mononuclear cells (PBMC) was assessed by the effect of exogenous ATP on apoptosis, the uptake of the fluorescent marker Lucifer yellow or extracellular signal regulated kinase (ERK) phosphorylation, no significant differences were detected in patients and controls. However, mRNA macroarray analysis showed that upon stimulation with ATP, the PBMC from TB patients showed a significant induction of a higher number of cytokine genes (27 of 96), and a lower number of apoptosis genes (20 of 96) compared to healthy controls (17 and 76 genes, respectively). These results suggest that although the PBMC from TB patients do not show apparent abnormalities in the expression of P2X(7), and the intracellular signals generated through it, the pattern of gene expression induced by ATP in these cells is different from that found in healthy contacts. This phenomenon suggests a defective function of P2X(7) in the immune cells from TB patients, a condition that may contribute to the inability of these patients to eliminate the mycobacteria." @default.
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• W1969637288 date "2006-09-27" @default.
• W1969637288 modified "2023-10-16" @default.
• W1969637288 title "Expression and function of the purinergic receptor P2X7 in patients with pulmonary tuberculosis" @default.
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• W1969637288 doi "https://doi.org/10.1111/j.1365-2249.2006.03213.x" @default.
• W1969637288 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/1942058" @default.
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