CD44 expression on murine hepatic stellate cells promotes the induction of monocytic and polymorphonuclear myeloid-derived suppressor cells.
J Leukoc Biol
; 116(1): 177-185, 2024 Jun 28.
Article
em En
| MEDLINE
| ID: mdl-38484149
ABSTRACT
In chronic inflammation, regulatory immune cells, such as regulatory T cells and myeloid-derived suppressor cells, can develop. Local signals in the inflamed tissue, such as cytokines and eicosanoids, but also contact-dependent signals, can promote myeloid-derived suppressor cell development. In the liver, hepatic stellate cells may provide such signals via the expression of CD44. Myeloid-derived suppressor cells generated in the presence of hepatic stellate cells and anti-CD44 antibodies were functionally and phenotypically analyzed. We found that both monocytic and polymorphonuclear myeloid-derived suppressor cells generated in the presence of αCD44 antibodies were less suppressive toward T cells as measured by T-cell proliferation and cytokine production. Moreover, both monocytic and polymorphonuclear myeloid-derived suppressor cells were phenotypically altered. Monocytic myeloid-derived suppressor cells mainly changed their expression of CD80 and CD39, and polymorphonuclear myeloid-derived suppressor cells showed altered expression of CD80/86, PD-L1, and CCR2. Moreover, both polymorphonuclear and monocytic myeloid-derived suppressor cells lost expression of Nos2 messenger RNA, whereas monocytic myeloid-derived suppressor cells showed reduced expression of TGFb messenger RNA and polymorphonuclear myeloid-derived suppressor cells reduced expression of Il10 messenger RNA. In summary, the presence of CD44 in hepatic stellate cells promotes the induction of both monocytic and polymorphonuclear myeloid-derived suppressor cells, although the mechanisms by which these myeloid-derived suppressor cells may increase suppressive function due to interaction with CD44 are only partially overlapping.
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Base de dados:
MEDLINE
Assunto principal:
Monócitos
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Receptores de Hialuronatos
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Células Estreladas do Fígado
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Células Supressoras Mieloides
Limite:
Animals
Idioma:
En
Revista:
J Leukoc Biol
Ano de publicação:
2024
Tipo de documento:
Article
País de afiliação:
Alemanha