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001-es BibID:	BIBFORM001996
Első szerző:	Eidsmo, Liv
Cím:	FasL and TRAIL induce epidermal apoptosis and skin ulceration upon exposure to Leishmania major / Liv Eidsmo, Caroline Fluur, Bence Rethi, Sofia Eriksson Ygberg, Nicolas Ruffin, Angelo De Milito, Hannah Akuffo, Francesca Chiodi
Dátum:	2007
Megjegyzések:	Receptor-mediated apoptosis is proposed as an important regulator of keratinocyte homeostasis in human epidermis. We have previously reported that Fas/FasL interactions in epidermis are altered during cutaneous leishmaniasis (CL) and that keratinocyte death through apoptosis may play a pathogenic role for skin ulceration. To further investigate the alterations of apoptosis during CL, a keratinocyte cell line (HaCaT) and primary human epidermal keratinocytes were incubated with supernatants from Leishmania major-infected peripheral blood mononuclear cells. An apoptosis-specific microarray was used to assess mRNA expression in HaCaT cells exposed to supernatants derived from L. major-infected cultures. Fas and tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) mRNA and protein expression were significantly up-regulated, and apoptosis was detected in both HaCaT and human epidermal keratinocyte cells. The keratinocyte apoptosis was partly inhibited through blocking of Fas or FasL and even more efficiently through TRAIL neutralization. Up-regulation of Fas on keratinocytes in epidermis and the presence of FasL-expressing macrophages and T cells in dermis were previously reported by us. In this study, keratinocytes expressing TRAIL, as well as the proapoptotic receptor TRAIL-R2, were detected in skin biopsies from CL cases. We propose that activation of Fas and TRAIL apoptosis pathways, in the presence of inflammatory mediators at the site of infection, leads to tissue destruction and ulceration during CL.
Tárgyszavak:	Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban apoptosis skin leishmania
Megjelenés:	The American Journal of Pathology. - 170 : 1 (2007), p. 227-239. -
További szerzők:	Fluur, Caroline Réthi Bence (1973-) (biológus, immunológus) Ygberg, Sofia Eriksson Ruffin, Nicolas De Milito, Angelo Akuffo, Hannah Chiodi, Francesca
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001-es BibID:	BIBFORM002005
Első szerző:	Fluur, Caroline
Cím:	Potential role for IL-7 in Fas-mediated T cell apoptosis during HIV infection / Caroline Fluur, Angelo De Milito, Terry J. Fry, Nancy Vivar, Liv Eidsmo, Ann Atlas, Cristina Federici, Paola Matarrese, Mariantonia Logozzi, Éva Rajnavölgyi, Crystal L. Mackall, Stefano Fais, Francesca Chiodi, and Bence Réthi
Dátum:	2007
Megjegyzések:	IL-7 promotes survival of resting T lymphocytes and induces T cell proliferation in lymphopenic conditions. As elevated IL-7 levels occur in HIV-infected individuals in addition to high Fas expression on T cells and increased sensitivity to Fas-induced apoptosis, we analyzed whether IL-7 has a regulatory role in Fas-mediated T cell apoptosis. We show that IL-7 up-regulates Fas expression on naive and memory T cells through a mechanism that involves translocation of Fas molecules from intracellular compartments to the cell membrane. IL-7 induced the association of Fas with the cytoskeletal component ezrin and a polarized Fas expression on the cell surface. The potential role of IL-7 in Fas up-regulation in vivo was verified in IL-7-treated macaques and in HIV-infected or chemotherapy treated patients by the correlation between serum IL-7 levels and Fas expression on T cells. IL-7 treatment primed T cells for Fas-induced apoptosis in vitro and serum IL-7 levels correlated with the sensitivity of T cells to Fas-induced apoptosis in HIV-infected individuals. Our data suggest an important role for IL-7 in Fas-mediated regulation of T cell homeostasis. Elevated IL-7 levels associated with lymphopenic conditions, including HIV-infection, might participate in the increased sensitivity of T cells for activation-induced apoptosis
Tárgyszavak:	Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban IL-7 Fas HIV
Megjelenés:	Journal of Immunology. - 178 : 8 (2007), p. 5340-5350. -
További szerzők:	De Milito, Angelo Eidsmo, Liv Atlas, Ann Federici, Cristina Matarrese, Paola Logozzi, Mariantonia Mackall, Crystal L. Fais, Stefano Chiodi, Francesca Rajnavölgyi Éva (1950-) (immunológus) Réthi Bence (1973-) (biológus, immunológus) Vivar, Nancy Fry, Terry J.
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