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Immunolocalization of prostasomes in the human prostate
B O Nilsson1, M Jin, G Ronquist
1Department of Human Anatomy, Biomedical Center, Uppsala, Sweden.
Upsala Journal of Medical Sciences
|January 1, 1996
Summary
Researchers developed a new monoclonal antibody (mAb 78) that specifically targets prostasomes, which are organelles derived from the prostate gland. This antibody shows potential as a reliable prostasome marker for diagnostic applications.
Area of Science:
- Urology
- Immunology
- Biochemistry
Background:
- Prostasomes are organelles originating from the prostate gland and are found in seminal plasma.
- Identifying specific markers for prostasomes is crucial for understanding prostate function and disease.
Purpose of the Study:
- To produce and characterize monoclonal antibodies (mAbs) against human prostasomes.
- To evaluate the potential of a specific mAb (mAb 78) as a prostasome marker.
Main Methods:
- Intrasplenic immunization was used to generate a panel of monoclonal antibodies against purified human prostasomes.
- Sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) and Western blotting were employed to analyze antibody recognition.
- Immunohistochemical staining was performed on prostatic tissues to assess antibody localization.
Main Results:
- Monoclonal antibody 78 (mAb 78) was identified as a prostasome-positive antibody.
- mAb 78 recognized a protein of approximately 35 kDa in purified prostasomes, seminal plasma, and prostatic tissue extracts.
- Immunostaining revealed that mAb 78 binds to the apical aspects of prostate secretory cells and glandular secretions, excluding nuclei.
Conclusions:
- Monoclonal antibody 78 is a specific marker for prostasomes.
- mAb 78 demonstrates significant potential for use in the identification and study of prostasomes in various biological contexts.