TY - JOUR
T1 - Interferon-γ and granulocyte-macrophage colony-stimulating factor augment the activity of polymorphonuclear leukocytes against medically important zygomycetes
AU - Gil-Lamaignere, Cristina
AU - Simitsopoulou, Maria
AU - Roilides, Emmanuel
AU - Maloukou, Avgi
AU - Winn, Richard M.
AU - Walsh, Thomas J.
PY - 2005/4/1
Y1 - 2005/4/1
N2 - Zygomycetes cause serious invasive infections, predominantly in immunocompromised and diabetic patients with poor prognoses and limited therapeutic options. We compared the antifungal function of human polymorphonuclear leukocytes (PMNLs) against hyphae of Rhizopus oryzae and R. microsporus, the most frequently isolated zygomycetes, with that against the less frequently isolated Absidia corymbifera. We then evaluated the effects of Interferon (IFN)-γ and granulocyte-macrophage colony-stimulating factor (GM-CSF), alone or combined, on PMNL antifungal function against these zygomycetes. Both PMNL oxidative burst in response to hyphae and PMNL-induced hyphal damage were significantly lower in response to Rhizopus species than in response to A. corymbifera. Incubation of PMNLs with IFN-γ and GM-CSF alone or combined for 22 h increased the PMNL-induced hyphal damage of all 3 species. The treatment of PMNLs with the combination of IFN-γ and GM-CSF significantly increased the release of tumor necrosis factor-α in response to R. microsporus and A. corymbifera hyphae. IFN-γ significantly reduced interleukin-8 release in response to all zygomycetes. Although Rhizopus species demonstrate a decreased susceptibility to the antifungal activity of human PMNLs, in comparison with A. corymbifera, IFN-γ and GM-CSF augment the hyphal damage of all 3 zygomycetes, suggesting a role for IFN-γ and GM-CSF in the management of invasive zygomycosis.
AB - Zygomycetes cause serious invasive infections, predominantly in immunocompromised and diabetic patients with poor prognoses and limited therapeutic options. We compared the antifungal function of human polymorphonuclear leukocytes (PMNLs) against hyphae of Rhizopus oryzae and R. microsporus, the most frequently isolated zygomycetes, with that against the less frequently isolated Absidia corymbifera. We then evaluated the effects of Interferon (IFN)-γ and granulocyte-macrophage colony-stimulating factor (GM-CSF), alone or combined, on PMNL antifungal function against these zygomycetes. Both PMNL oxidative burst in response to hyphae and PMNL-induced hyphal damage were significantly lower in response to Rhizopus species than in response to A. corymbifera. Incubation of PMNLs with IFN-γ and GM-CSF alone or combined for 22 h increased the PMNL-induced hyphal damage of all 3 species. The treatment of PMNLs with the combination of IFN-γ and GM-CSF significantly increased the release of tumor necrosis factor-α in response to R. microsporus and A. corymbifera hyphae. IFN-γ significantly reduced interleukin-8 release in response to all zygomycetes. Although Rhizopus species demonstrate a decreased susceptibility to the antifungal activity of human PMNLs, in comparison with A. corymbifera, IFN-γ and GM-CSF augment the hyphal damage of all 3 zygomycetes, suggesting a role for IFN-γ and GM-CSF in the management of invasive zygomycosis.
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U2 - 10.1086/428503
DO - 10.1086/428503
M3 - Article
C2 - 15747255
AN - SCOPUS:15544377441
SN - 0022-1899
VL - 191
SP - 1180
EP - 1187
JO - Journal of Infectious Diseases
JF - Journal of Infectious Diseases
IS - 7
ER -