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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Jpn+J+Cancer+Res
1994 ; 85
(9
): 939-45
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Apoptotic cell death in human gastric carcinoma: analysis by terminal
deoxynucleotidyl transferase-mediated dUTP-biotin nick end labeling
#MMPMID7961123
Kasagi N
; Gomyo Y
; Shirai H
; Tsujitani S
; Ito H
Jpn J Cancer Res
1994[Sep]; 85
(9
): 939-45
PMID7961123
show ga
We have examined the occurrence of apoptotic cell death in formalin-fixed,
paraffin-embedded human gastric carcinoma specimens by the terminal
deoxynucleotidyl transferase (TdT)-mediated dUTP-biotin nick end labeling (TUNEL)
method. The specificity of the TUNEL signals was confirmed by the omission of
either TdT or biotinylated dUTP as negative controls, and by pretreatment with
DNase I as a positive control. Careful observation of routine hematoxylin and
eosin-stained sections showed a few tumor cells with apoptosis, especially in
well-differentiated carcinomas. Intense TUNEL signals were frequently observed
even in ordinary, non-pyknotic nuclei of tumor cells, and occasionally also in
nuclear fragments corresponding to apoptotic bodies. Apoptotic indices (number of
apoptotic cells/total number of tumor cells) ranged between 7.7 and 14.5% (mean,
10.9%) in nine well-differentiated carcinomas and between 2.7 and 7.5% (mean,
4.0%) in five which were poorly differentiated, the mean number being
significantly higher in the former (P < 0.01). No apparent correlation was found
between apoptosis and the expression of proliferating cell nuclear antigen, P53
or Le(y) in the present study. This high frequency of apoptosis, implying cell
loss, may be related to the slow-growing nature of well-differentiated
carcinomas. Poorly differentiated carcinomas, including scirrhous gastric
carcinomas, showed a lower incidence of apoptosis, indicating the existence of an
escape mechanism from the process.