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The Fas antigen is a transmembrane receptor that can trigger apoptosis in a variety of tumor and hematopoietic cells. Ovarian follicular atresia and luteolysis are thought to occur by apoptosis. Using reverse transcriptase-polymerase chain reaction (RT-PCR) and flow cytometry, we demonstrated that human granulosa/luteal cells express the Fas antigen. An anti-human Fas antigen monoclonal antibody (Fas mAb; clone CH-11), which induces apoptosis in other cell types by binding to the Fas antigen, induced significant cell death (30%) in cultures pretreated with interferon gamma (IFN gamma). This agrees with studies on tumor cell lines showing that IFN gamma enhances cytotoxic effects of Fas mAb. Granulosa/luteal cells exhibited morphological characteristics typical of apoptosis, including membrane blebbing and condensed chromatin. DNA fragmentation into oligonucleosomal units of approximately 180 bp, typical of apoptosis, was detected at elevated levels in Fas mAb-treated cultures via 3' end-labeling and gel electrophoresis. Examination of cultured cells in situ for apoptotic DNA cleavage by terminal deoxynucleotidyl transferase (TdT)-mediated dUTP-digoxigenin nick end-labeling (TUNEL) indicated that more apoptotic death occurred in Fas mAb-treated cultures than in control cultures. Effects of hCG-induced luteinization of cultures on Fas mAb-induced cytotoxicity was examined: combined pretreatment with IFN gamma and hCG induced a synergistic increase in Fas mAb-induced cytotoxicity (40%) over that obtained with IFN gamma-pretreatment alone (15%). In summary, granulosa/luteal cells express the Fas antigen and are sensitive to Fas mAb-induced apoptosis. Human CG synergized with IFN gamma to increase Fas mAb-induced death.(ABSTRACT TRUNCATED AT 250 WORDS)
S M Quirk, and
R G Cowan, and
S G Joshi, and
K P Henrikson
October 2003,
Fertility and sterility,
S M Quirk, and
R G Cowan, and
S G Joshi, and
K P Henrikson
March 2007,
Reproductive biology,
S M Quirk, and
R G Cowan, and
S G Joshi, and
K P Henrikson
April 1996,
Immunology,
S M Quirk, and
R G Cowan, and
S G Joshi, and
K P Henrikson
August 2000,
The American journal of gastroenterology,
S M Quirk, and
R G Cowan, and
S G Joshi, and
K P Henrikson
September 1995,
Oncogene,
S M Quirk, and
R G Cowan, and
S G Joshi, and
K P Henrikson
February 1998,
Leukemia & lymphoma,
S M Quirk, and
R G Cowan, and
S G Joshi, and
K P Henrikson
September 2000,
Nature biotechnology,
S M Quirk, and
R G Cowan, and
S G Joshi, and
K P Henrikson
June 2005,
Endocrine journal,
S M Quirk, and
R G Cowan, and
S G Joshi, and
K P Henrikson
February 2012,
Gene,
S M Quirk, and
R G Cowan, and
S G Joshi, and
K P Henrikson
April 2004,
Thyroid : official journal of the American Thyroid Association,
