Ts. Frode et Ys. Medeiros, Myeloperoxidase and adenosine-deaminase levels in the pleural fluid leakage induced by carrageenan in the mouse model of pleurisy, MEDIAT INFL, 10(4), 2001, pp. 223-227
Background: Although myeloperoxidase (MPO) and adenosine-deaminase (ADA) le
vels are markers of activated leukocytes, both enzymes have not been curren
tly addressed in inflammation models.
Aims: This study evaluates whether the concentrations of these enzymes are
significantly correlated with the content of leukocytes in a pleurisy model
.
Methods: The pleurisy was induced by carrageenan (1%) in mice, and the para
meters analyzed 4 and 48 h after.
Results: After the induction of inflammation (4 h), MPO and ADA levels peak
ed in parallel to neutrophils (p<0.01). Regarding the second phase of pleur
isy (48 h), the highest concentrations of ADA were detected in parallel to
the highest levels of mononuclears (p<0.01). At this time, MPO levels and n
eutrophils; remained elevated, although at lower levels than those found at
4 h. A significant positive correlation was found among neutrophils and MP
O, and mononuclears; and ADA (p<0.01).
Conclusions: These findings support the evidence that both enzymes are mark
ers of the inflammatory process, and provide new tools for a better underst
anding of the immunoregulatory pathways that occur in inflammation.