TY - JOUR
T1 - Cytotoxic Cells Directed Against Placental Cells Detected In Human Habitual Abortions by an In Vitro Terminal Labeling Assay
AU - Yokoyama, Motofumi
AU - Sano, Masatoshi
AU - Sonoda, Kenzo
AU - Nozaki, Masahiro
AU - Nakamura, Gen‐Ichi ‐I
AU - Nakano, Hitoo
PY - 1994/5
Y1 - 1994/5
N2 - PROBLEM: From the clinical point of view, it has been proposed that an immunological imbalance between the mother and the fetus might exist in one of the mechanisms for human habitual abortion. However, in the definition of habitual abortion, we have no distinct immunological criteria for this clinical entity at the moment. METHOD: We employed aborted placental cells as the target cells in an in vitro terminal labeling (IVTL) assay system, in which the cytotoxic activity of maternal peripheral blood mononuclear cells (PBMCs) against the placental cell was examined. RESULTS: Our results showed that the cytotoxic activity of maternal PBMCs was significantly higher in the habitual aborters (the mean target cell destruction: %TCD = 34.9%, N = 14) than that in the women with a normal first trimester (the mean %TCD = 8.9%, N= 14, P<.01). The results from the IVTL assay did not correlate with other assays using paternal lymphocytes as the target cells. The surface marker analyses revealed that CD16+ cells, CD14 + cells, and CD5+ cells were involved in the cytotoxic response against the placental cells in various degrees among the cases. CONCLUSIONS: The above evidence suggests that a variety of cytotoxic cells participate in the phenomenon of human habitual abortion. 1994 Munksgaard
AB - PROBLEM: From the clinical point of view, it has been proposed that an immunological imbalance between the mother and the fetus might exist in one of the mechanisms for human habitual abortion. However, in the definition of habitual abortion, we have no distinct immunological criteria for this clinical entity at the moment. METHOD: We employed aborted placental cells as the target cells in an in vitro terminal labeling (IVTL) assay system, in which the cytotoxic activity of maternal peripheral blood mononuclear cells (PBMCs) against the placental cell was examined. RESULTS: Our results showed that the cytotoxic activity of maternal PBMCs was significantly higher in the habitual aborters (the mean target cell destruction: %TCD = 34.9%, N = 14) than that in the women with a normal first trimester (the mean %TCD = 8.9%, N= 14, P<.01). The results from the IVTL assay did not correlate with other assays using paternal lymphocytes as the target cells. The surface marker analyses revealed that CD16+ cells, CD14 + cells, and CD5+ cells were involved in the cytotoxic response against the placental cells in various degrees among the cases. CONCLUSIONS: The above evidence suggests that a variety of cytotoxic cells participate in the phenomenon of human habitual abortion. 1994 Munksgaard
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U2 - 10.1111/j.1600-0897.1994.tb00867.x
DO - 10.1111/j.1600-0897.1994.tb00867.x
M3 - Article
C2 - 8060503
AN - SCOPUS:0028247112
VL - 31
SP - 197
EP - 204
JO - Early pregnancy (Online)
JF - Early pregnancy (Online)
SN - 1046-7408
IS - 4
ER -