Immunohistochemical study of ras p21 expression in human gastric cancers and benign lesions.

Abstract:

:Expression of ras p21 in human gastric cancers, benign lesions and normal tissues was immunohistochemically evaluated by the avidin-biotin peroxidase complex (ABC) method with anti-ras p21 monoclonal antibody rp-28. Positive p21 immunoreactivity was shown in 23 (77%) of 30 gastric cancers, in 13 (48%) of 27 benign lesions and in 10 (22%) of 46 normal mucosa cases. Among them, strong staining was demonstrated only in 11 (37%) of 30 gastric cancers, but not in benign lesions and normal tissues. Cases showing more than 20% positive cell ratio were observed in 22 (73%) gastric cancers, in 11 (41%) benign lesions and 6 (13%) normal mucosa cases. Further, intracellular distribution of ras p21 is heterogeneous in gastric cancers, while it is homogeneous in benign lesions or normal tissues. The ABC method with rp-28 could be helpful for clinical differential diagnosis between gastric cancers and benign lesions by investigating three factors: staining intensity, positive cell ratio and intracellular distribution of ras p21.

journal_name

Oncology

journal_title

Oncology

authors

Nakajima K,Kuzumaki N,Oda A,Kobayashi H,Katoh H,Tanabe T

doi

10.1159/000226728

subject

Has Abstract

pub_date

1989-01-01 00:00:00

pages

260-5

issue

4

eissn

0030-2414

issn

1423-0232

journal_volume

46

pub_type

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