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Analysis of immunoregulatory activity of a choriocarcinoma-derived factor: specific suppression of proliferative process of cell-mediated immune responses including LAK cell generation.

Abstract：

:The immunosuppressive activity of a JEG-3 choriocarcinoma-derived factor in human IL-2-dependent T cell responses has been studied, together with its effect on IL-2-independent T cell responses induced by 10 nM TPA. The factor completely suppressed the IL-2-independent proliferative responses of T cells but failed to suppress antigenic expression of activation-associated CD 25 molecules. Further studies examined the effect of the factor on LAK cell generation induced by rIL-2. Recombinant IL-2-induced LAK cell proliferation was observed on Day 4 and Day 5, but not on Day 3. As the factor suppressed the responses of LAK cell proliferation, we tested whether it blocked the generation of Day 3, Day 4 and Day 5 LAK cells. The addition of the factor failed to suppress the generation of Day 3 LAK cells, while it partially suppressed the lytic activity of Day 4 LAK cells and completely suppressed that of Day 5 LAK cells. The data suggest the presence of a heterogeneous pattern for LAK cell generation; one without proliferation, but the other requiring proliferation, to acquire killer activity. Taken together with the evidence that the factor failed to suppress NK activity, the choriocarcinoma-derived factor suppressed only the proliferative events of immunocompetent cells, but inhibited neither their activation nor the differentiation events. This immunosuppressive factor might be involved in the prevention of host-mediated rejection of choriocarcinoma cells or maternal rejection of the fetus.

journal_name

J Reprod Immunol

journal_title

Journal of reproductive immunology

authors

Matsuzaki N,Saji F,Okada T,Sawai K,Kameda T,Tanizawa O

doi

10.1016/0165-0378(91)90011-e

subject

Has Abstract

pub_date

1991-02-01 00:00:00

pages

101-14

issue

2

eissn

0165-0378

issn

1872-7603

pii

0165-0378(91)90011-E

journal_volume

19

pub_type

杂志文章

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