Expression of nm23-H1 and nm23-H2 proteins in prostate carcinoma.
The nm23 gene products/nucleoside diphosphate (NDP) kinase expression in prostate carcinomas and benign hyperplasias was evaluated immunohistochemically. Monoclonal antibodies against nm23-H1 and nm23-H2 proteins were prepared using the corresponding proteins fused with glutathione S-transferase as immunogens. Of the 80 cases of nonmetastatic prostate carcinoma examined, 74% (59/80) and 60% (48/80) were immunoreactive for nm23-H1 or nm23-H2 protein, respectively. Negative staining for nm23-H1 occurred in 83% of metastatic lesions, while 34% were negative for nm23-H2. All primary tumors corresponding to the metastases examined showed positive immunostaining for nm23-H1, indicating an inverse relationship between expression of this protein and metastatic status. nm23-H2 protein was detected in 83% of primary tumors and its expression appeared to be significantly correlated to the degree of histological differentiation. In contrast, all cases of benign prostatic hyperplasia showed elevated levels of both nm23-H1 and nm23-H2 expression. These data suggest that the nm23/NDP kinase may play a role in suppressing the expression of malignant potential in prostate carcinomas.
Konishi
N
N
Department of Pathology, Nara Medical University.
Nakaoka
S
S
Tsuzuki
T
T
Matsumoto
K
K
Kitahori
Y
Y
Hiasa
Y
Y
Urano
T
T
Shiku
H
H
D000230:Adenocarcinoma / Q000378:metabolism*; D000911:Antibodies, Monoclonal; D002454:Cell Differentiation; D006801:Humans; D007150:Immunohistochemistry; D008297:Male; D020559:Monomeric GTP-Binding Proteins; D054778:NM23 Nucleoside Diphosphate Kinases; D009362:Neoplasm Metastasis; D009701:Nucleoside-Diphosphate Kinase / Q000378:metabolism*; D011470:Prostatic Hyperplasia / Q000378:metabolism; D011471:Prostatic Neoplasms / Q000378:metabolism*; D014157:Transcription Factors / Q000378:metabolism*
D000911:Antibodies, Monoclonal; D054778:NM23 Nucleoside Diphosphate Kinases; D014157:Transcription Factors; C517938:NME1 protein, human; D009701:Nucleoside-Diphosphate Kinase; D020559:Monomeric GTP-Binding Proteins