TGF-ß and EGF induced HLA-I downregulation is associated with epithelial-mesenchymal transition (EMT) through upregulation of snail in prostate cancer cells.
Mol Immunol
; 65(1): 34-42, 2015 May.
Article
em En
| MEDLINE
| ID: mdl-25618241
ABSTRACT
Human leukocyte antigen class I antigens (HLA-I) is essential in immune response by presenting antigenic peptides to cytotoxic T lymphocytes. Downregulation of HLA-I is observed in primary and metastatic prostate cancers, which facilitates them escape from immune surveillance, thereby promotes prostate cancer progression. In addition, elevated level of growth factors like TGF-ß or EGF in microenvironment is related to the prostate cancer deterioration. Thus, we wondered whether TGF-ß or EGF was involved in the regulation of HLA-I during the development of prostate cancer cells. In this study, we demonstrated that TGF-ß and EGF both downregulated the expression of HLA-I, thereby attenuated the cytotoxic T cell mediated lysis of prostate cancer cells. Next, we revealed that TGF-ß and EGF induced downregulation of HLA-I is associated with classical epithelial-mesenchymal transition (EMT) morphological changes and expression profiles. We further illustrated that overexpression of Snail is crucial for HLA-I downregulation and its association with EMT. At last, we discussed that NF-κB/p65 is the plausible target for Snail to induce HLA-I downregulation. Taken together, this is the first evidence to reveal that both TGF-ß and EGF can induce HLA-I downregulation which is then proven to be associated with EMT in prostate cancer cells. These discoveries provide a deeper understanding of growth factors induced immune escape and introduce potential therapeutic targets for prostate cancers.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Neoplasias da Próstata
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Antígenos de Histocompatibilidade Classe I
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Fator de Crescimento Transformador beta
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Fator de Crescimento Epidérmico
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Transição Epitelial-Mesenquimal
Tipo de estudo:
Risk_factors_studies
Limite:
Humans
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Male
Idioma:
En
Revista:
Mol Immunol
Ano de publicação:
2015
Tipo de documento:
Article
País de afiliação:
China