Characterisation of dendritic cell subsets in lung cancer micro-environments.
Eur Respir J
; 28(6): 1170-7, 2006 Dec.
Article
en En
| MEDLINE
| ID: mdl-16899480
The aim of the current study was to seek evidence for a correlation between mediators present in lung cancer micro-environments and subsets of dendritic cells (DCs) infiltrating these tumours. Immunohistochemistry and recently available antibodies were used to define the phenotype of DCs present in surgical biopsies from 12 patients with lung carcinomas, and the local expression of chemokines potentially involved in the recruitment of these cells was evaluated, both at mRNA and protein levels. Real-time PCR was used to analyse the expression of mRNA coding for cytokines known to influence the maturation of DCs in vitro. Different subsets of myeloid DCs were present in lung cancers, but no plasmocytoid DCs were identified. Both Langerhans cells and CD1a+/Langerin cells were interspersed among tumour cells, in numbers that were correlated to the amounts of CC chemokine ligand 20 produced in these tumours. In most specimens, DC-specific intercellular adhesion molecule-grabbing nonintegrin-positive DCs were also present at the periphery of the tumour beds. No DC-lysosomal associated membrane protein-positive DCs were identified and CD83+ DCs were rarely present in the tumour stroma. All tumours expressed interleukin (IL)-10, transforming growth factor-beta and vascular endothelial growth factor, whereas IL-12 was virtually absent. Thus, various types of dendritic cells infiltrate lung carcinomas and display an immature phenotype, presumably because of the inhibitory cytokine micro-environment.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Células Dendríticas
/
Citocinas
/
Células Mieloides
/
Neoplasias Pulmonares
Tipo de estudio:
Prognostic_studies
Idioma:
En
Revista:
Eur Respir J
Año:
2006
Tipo del documento:
Article
País de afiliación:
Francia
Pais de publicación:
Reino Unido