Phenotypically non-suppressive cells predominate among FoxP3-positive cells in oral lichen planus.
J Oral Pathol Med
; 45(10): 766-773, 2016 Nov.
Article
em En
| MEDLINE
| ID: mdl-27084447
ABSTRACT
BACKGROUND:
Oral lichen planus (OLP) is a common T-cell-dominated oral chronic inflammatory disease occurring in periods of remission, quiescence, activity with pronounced inflammation, and acute ulceration. Cell infiltrates in OLP contain varying numbers of CD4+ T cells expressing the transcription factor FoxP3. FoxP3+ CD4+ T cells are, however, a heterogeneous cell population containing suppressive and non-suppressive cells, and their distribution in infiltrates from OLP is unknown.METHODS:
Biopsies were taken from normal oral mucosa (n = 8) and OLP lesions (n = 19), and a set of in situ methods for the determination of the functional phenotype of FoxP3+ CD4+ T cells was applied.RESULTS:
Numbers of FoxP3+ CD4+ T cells were highest in the atrophic form of the disease, yet low in the ulcerative form. The main FoxP3+ CD4+ T-cell population observed was FoxP3+ CD45RA- CD25+ CD45RO+ and CD15s- , a phenotype delineating a non-suppressive subset. Numbers of cells with an actively suppressing phenotype (FoxP3+ CD45RA- CD25+ CD45RO+ and CD15s+ ) were, however, about twice as high in reticular lesions as compared with the atrophic form. Many FoxP3+ CD4+ T cells expressed T-bet, the hallmark transcription factor for IFN-γ-producing T cells, indicating that they may enhance immune and inflammatory responses rather than suppress them.CONCLUSIONS:
The absence of actively suppressing FoxP3+ CD4+ T cells may in part explain why OLP is a remarkably persisting condition, in spite of the presence of substantially high numbers of FoxP3+ CD4+ T cells. The findings emphasize that it is crucial to examine not only numbers but also functional phenotype of FoxP3+ CD4+ T cells in human tissues.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Temas:
Geral
Base de dados:
MEDLINE
Assunto principal:
Linfócitos T Reguladores
/
Líquen Plano Bucal
/
Fatores de Transcrição Forkhead
Limite:
Adult
/
Aged
/
Humans
/
Middle aged
Idioma:
En
Revista:
J Oral Pathol Med
Assunto da revista:
ODONTOLOGIA
/
PATOLOGIA
Ano de publicação:
2016
Tipo de documento:
Article
País de afiliação:
Noruega