Decreased T-Cell Programmed Death Receptor-1 Expression in Pregnancy-Associated Melanoma.
Am J Dermatopathol
; 41(3): 180-187, 2019 Mar.
Article
en En
| MEDLINE
| ID: mdl-30308543
ABSTRACT
INTRODUCTION:
Pregnancy depends on tolerance of an immunologically foreign fetus through type 1 T-cell suppression. Worse melanoma outcomes have been described within 1 year of childbirth. We assessed immunopathologic factors that may account for the observed negative impact of pregnancy on outcome. MATERIALS ANDMETHODS:
Women of child-bearing age with ≥24 months follow-up were identified from our Institutional Melanoma Registry. Women with available primary tumor blocks were compared [history of childbirth within 1 year of diagnosis (CB1Y) (n = 18) vs. nonpregnant age-matched controls (n = 13)]. Immunohistochemical staining with quantification of immune infiltrates CD68 tumor-associated macrophages, CD3 tumor-infiltrating T cells, and PD-1 activated/exhausted T cells; and hematolymphangiogenesis CD31/D2-40 blood vessels and D2-40 lymphatics was performed by 2 blinded dermatopathologists.RESULTS:
CB1Y tumors showed decreased CD3 tumor-infiltrating T cells (P < 0.05) with significantly reduced PD1 expression (P ≤ 0.05). The CD3PD1 ratio was higher in CB1Y (P < 0.05). Other tested parameters did not significantly differ between the 2 groups.DISCUSSION:
As PD1 expression is induced during type 1 T-cell activation, these data suggest that immune ignorance or suppression may predominate in CB1Y. Further studies are required to identify interventions that may promote tumor-associated T-cell inflammation in such patients.
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Neoplasias Cutáneas
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Linfocitos T
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Biomarcadores de Tumor
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Linfocitos Infiltrantes de Tumor
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Receptor de Muerte Celular Programada 1
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Melanoma
Tipo de estudio:
Prognostic_studies
/
Risk_factors_studies
Límite:
Adult
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Female
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Humans
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Pregnancy
Idioma:
En
Año:
2019
Tipo del documento:
Article