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ID 16974
Eprint ID
16974
FullText URL
Thumnail 91_1101.pdf 2.97 MB
Title Alternative
Antibody-dependent cell-mediated cytotoxicity (ADCC) of human peripheral blood leukocytes using sheep red blood cells as target cells Part I. Fundamental studies with special reference to erythrophagocytosis
Author
Ichikawa, Yukinobu
Abstract
Antibody-dependent cell-mediated cytotoxicity (ADCC) of human peripheral leukocytes was investigated using (51)Cr-labelled sheep red blood cells (SRBC) sensitized with rabbit anit-SRBC antibody as target cells. ADCC (lysis of target cells without erythrophagocytosis) was mediated by the lymphocytes. On the other hand, phagocytes including monocytes and granulocytes showed antibody-dependent erythrophagocytosis (ADEP). ADCC of the lymphocytes was augumented by the enrichment of Fc-receptor bearing or Nylon-wool column passing cells. Phagocytes showed rapid ADEP, and granulocytes released (51)Cr-radioactivity originating from target cells into the culture medium in a short time, whereas the monocytes released little radioactivity during the incubation period. The monocytes inhibited ADCC of the lymphocytes competitivelly through ADEP, since decreased ADCC activity of monocyte-contaminated crude lymphocyte fraction was recovered by elimination of contaminating monocytes. Antibody-independent erythrophagocytosis of SRBC was mediated by monocytes, but not by granulocytes. Both ADCC of lymphocytes and ADEP of phagocytes were dependent on IgG-antibody, IgM-antibody did not participate in these phenomena. ADEP of monocytes was detected at 10(-2)-10(-6) dilution of IgG-antibody fraction (original hemmagglutination titer; × 1600), and ADCC of lymphocytes and ADEP of granulocytes were detected at 10(-2)-10(-4) and 10(-2)-10(-3) dilution of this antibody fraction, respectively. Soluble cytotoxic factors were not released from lymphocytes, monocytes or granulocytes in this assay system, because no cytotoxic activity on (51)Cr-labelled human erythrocytes used as an adjacent cell was demonstrated by any leukocyte fraction in the presence of antibody-coated SRBC.
Keywords
antibody-dependent cell-mediated
cytotoxicity
erythrophagocytosis
sheep red blood cells
Published Date
1979-10-30
Publication Title
岡山医学会雑誌
Publication Title Alternative
Journal of Okayama Medical Association
Volume
volume91
Issue
issue9-10
Publisher
岡山医学会
Publisher Alternative
Okayama Medical Association
Start Page
1101
End Page
1115
ISSN
0030-1558
NCID
AN00032489
Content Type
Journal Article
Official Url
https://www.jstage.jst.go.jp/article/joma1947/91/9-10/91_9-10_1101/_article/-char/ja/
Related Url
http://www.okayama-u.ac.jp/user/oma/index.html
language
日本語
Copyright Holders
岡山医学会
File Version
publisher
Refereed
True
Eprints Journal Name
joma