Kc. Mccullough et al., PHENOTYPE OF PORCINE MONOCYTIC CELLS - MODULATION OF SURFACE-MOLECULEEXPRESSION UPON MONOCYTE DIFFERENTIATION INTO MACROPHAGES, Veterinary immunology and immunopathology, 58(3-4), 1997, pp. 265-275
When porcine blood monocytes differentiate in vitro into macrophages,
their morphology, as well as side scatter and forward scatter measured
by flow cytometry, changed in a manner similar to that with human cel
ls. During this differentiation, the initial high expression of CD mol
ecules on porcine monocytes was down-regulated, with one exception-SWC
9. Freshly isolated blood monocytes were SWC9(-), but after culture th
e cells had become SWC9(+). Thus, porcine monocytes were characterised
as SWC3(+)SWC9(-)CD14(high); macrophages were SWC3(+)SWC9(+)CD14(low)
, the latter also displaying a down-regulation of CD11a/18, and, to a
lesser degree, CD44. Both SWC9(-)CD14(high) monocytes and SWC9(+)CD14(
low) macrophages were identifiable in freshly prepared monocytic cells
from the spleen. Alveolar macrophages, on the other hand, were domina
ted by SWC9(+)CD14(low) cells, similar in phenotype to in vitro monocy
te-derived macrophages. The consequences which these results have for
studies on virus infections of porcine monocytic cells are discussed.
(C) 1997 Elsevier Science B.V.