抗γ-seminoprotein モノクローナル抗体による前立腺組織の免疫組織化学的検討

: The immunohistochemical specificity of the monoclonal antibody (43-21-1-1) against gamma-seminoprotein (gamma-Sm) in the prostatic tissues was evaluated by avidin-biotin peroxidase complex method. The normal tissues of various organs, other than male genitourinary organs already examined in the previous study, the brain, skin, spinal cord, tongue, esophagus, stomach, small intestine, rectum, trachea, lung, pleura, diaphragm, liver, spleen, pancreas, mesentery, kidney, lymph node, bone, bone marrow and striated muscle were examined for control study. The prostatic tissues obtained by surgery or biopsy, benign prostatic hyperplasia (BPH; 72) urethral polyp with prostatic-type epithelium (1), bone (3) or testicular (2) metastases from adenocarcinoma of the prostate and malignant neoplasms other than adenocarcinoma of the prostate, including primary small-cell carcinoma (1), secondary embryonal carcinoma (1) and secondary mucinous adenocarcinoma (1) of the prostate were then examined. Since all but 2 (97%) specimens of BPH were obtained by transurethral resection (TUR), which might cause non-specific staining due to electro-mechanical effects, the tissue of BPH obtained by suprapubic prostatectomy were examined simultaneously, serving as a control for immunostaining. The normal tissues of various organs were never stained positively for gamma-Sm. Positive reactions of gamma Sm with this monoclonal antibody were recognized in the cytoplasms of urethral polyp with prostatic-type epithelium, bone or testicular metastases from adenocarcinoma of the prostate. The malignant neoplasms other than adenocarcinoma of the prostate examined in this study, were never stained positively. There was obviously evidence of non-specific staining in the TUR tissues of BPH.(ABSTRACT TRUNCATED AT 250 WORDS)