Expression of epidermal growth factor receptor in human gastric and colonic carcinomas
The expression of epidermal growth factor (EGF) receptor was examined immunohistochemically in a total of 122 gastric and 61 colonic carcinomas, out of which 16 gastric and 8 colonic carcinomas were also examined by /sup 125/I-labeled EGF binding analysis and Western blotting. The values of EGF binding were 12.68 +/- 1.98 (SE; n = 16) fmol/mg protein in gastric carcinomas and 5.72 +/- 2.15 (n = 8) fmol/mg protein in nonneoplastic gastric mucosa, the difference being significant (P less than 0.01). In the colonic tissue, the binding capacities in carcinomas and nonneoplastic mucosa were 13.29 +/- 4.17 (n = 8) and 10.68 +/- 0.41 (n = 3) fmol/mg protein, respectively. Scatchard analysis of /sup 125/I-labeled EGF binding indicated a single class of receptors in gastric and colonic carcinomas with an apparent Kd value of from 111 to 277 (n = 4) and from 87.4 to 341 fM (n = 5), respectively, except for one gastric carcinoma having two classes of receptors (Kd = 15.9 and 896 fM). In Western blotting using monoclonal anti-EGF receptor antibody, various levels of EGF receptor expression were detected in 12 (85.7%) of the 14 gastric carcinomas and in 7 (87.5%) of the 8 colonic carcinomas. Immunohistochemically, EGF receptor immunoreactivity was detected in one (3.8%) of the 26 early gastric carcinomas, while it was observed in 33 (34.4%) of the 96 advanced gastric carcinomas, the incidence between the two being significantly different (P less than 0.01). In the colonic carcinomas, 47 (77.1%) of the 61 cases showed positive immunoreactivity to EGF receptor, which did not differ by histological type.
- Research Organization:
- Hiroshima Univ. School of Medicine, Japan
- OSTI ID:
- 5403740
- Journal Information:
- Cancer Res.; (United States), Vol. 48:1
- Country of Publication:
- United States
- Language:
- English
Similar Records
Thyroid hormone regulation of epidermal growth factor receptor levels in mouse mammary glands
Neurotensin high affinity binding sites and endopeptidase 24. 11 are present respectively in the meningothelial and in the fibroblastic components of human meningiomas
Related Subjects
GROWTH FACTORS
BIOCHEMICAL REACTION KINETICS
RECEPTORS
LARGE INTESTINE
CARCINOMAS
EPIDERMIS
IMMUNE REACTIONS
IODINE 125
MONOCLONAL ANTIBODIES
ANIMAL TISSUES
ANTIBODIES
BETA DECAY RADIOISOTOPES
BODY
DAYS LIVING RADIOISOTOPES
DIGESTIVE SYSTEM
DISEASES
ELECTRON CAPTURE RADIOISOTOPES
EPITHELIUM
GASTROINTESTINAL TRACT
INTERMEDIATE MASS NUCLEI
INTESTINES
IODINE ISOTOPES
ISOTOPES
KINETICS
MEMBRANE PROTEINS
MITOGENS
NEOPLASMS
NUCLEI
ODD-EVEN NUCLEI
ORGANIC COMPOUNDS
ORGANS
PROTEINS
RADIOISOTOPES
REACTION KINETICS
SKIN
TISSUES
550201* - Biochemistry- Tracer Techniques
550901 - Pathology- Tracer Techniques