The appearance of L-selectin(low) polymorphonuclear leukocytes in the circulating pool of peripheral blood during myocardial infarction correlates with neutrophilia and with the size of the infarct
M. Kassirer et al., The appearance of L-selectin(low) polymorphonuclear leukocytes in the circulating pool of peripheral blood during myocardial infarction correlates with neutrophilia and with the size of the infarct, CLIN CARD, 22(11), 1999, pp. 721-726
Background: It is assumed that not only leukocytosis, but also the activati
on of white blood cells (WBC) may play a role in the pathogenesis and progn
osis of patients with myocardial infarction (MI). Activation of WBC include
s upregulation of CD11b\CD18 and downregulation of CD62L (L-selectin) antig
ens.
Hypothesis: The activation of WBC is associated with the appearance of a la
rger MI.
Methods: CD11b\CD18 and CD62L were measured on the surface of WBC on Day 1
and Day 3 from the onset of MI. The size of the infarct was estimated by ca
lculating the area under the curve of the creatine kinase enzyme, which was
measured every 6 h.
Results: A negative correlation was noted between the absolute polymorphonu
clear count and the availability of the CD62L on these cells during Day 1 (
r = -0.46, p = 0.003) and Day 3 (r = -0.35, p = 0.05). There was a positive
correlation between the size of MI and the WBC count (r = 0.46, p 0.004) a
nd a negative correlation with CD62L on polymorphonuclears (r = -0.35, p =
0.03). During Day 3, the CD11b\CD18 on the polymorphonuclears increased des
pite a decrement in the absolute number of these cells.
Conclusion: The neutrophilia during the early phases of acute MI correspond
to the appearance of the L-selectin(low) population of polymorphonuclear l
eukocytes. There is a correlation between the: appearance of this populatio
n and the size of the infarct.