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Prenatal expression of the 65-kDa heat-shock protein homologue in pig tissues
I Trebichavský1, I Splíchal, J Ivanyi
1Department of Immunology and Gnotobiology, Academy of Sciences of the Czech Republic, Prague.
Abstract:
A monoclonal antibody (ML30) recognizing the 65-kDa heat-shock protein of mycobacteria and reacting with homologous human protein was found to stain various porcine tissues. Development of this reactivity was studied. The first ML30-positive cells were embryonic hepatocytes. The protein reacting with the ML30 antibody was localized predominantly in the Golgi area and mitochondria of hepatocytes. Cell membranes of some peripheral blood lymphocytes were also found to bind ML30.
Insights
A novel monoclonal antibody (ML30) targets the 65-kDa heat-shock protein in mycobacteria and humans. This study investigates its reactivity in porcine tissues, identifying initial expression in embryonic hepatocytes and later in lymphocytes.
Area of Science:
- Immunology
- Cell Biology
- Veterinary Science
Background:
- Heat-shock proteins (HSPs) are crucial for cellular stress response.
- The 65-kDa HSP of mycobacteria shares homology with human proteins.
- Monoclonal antibody ML30 recognizes both mycobacterial and homologous human HSPs.
Purpose of the Study:
- To investigate the development of ML30 antibody reactivity in various porcine tissues.
- To identify the cellular localization of the target protein in developing porcine cells.
- To understand the expression patterns of the 65-kDa HSP in porcine tissues.
Main Methods:
- Immunohistochemical staining of porcine tissues using the ML30 monoclonal antibody.
- Microscopic examination to determine cellular localization of ML30-positive staining.
- Analysis of ML30 reactivity during embryonic development.
Main Results:
- ML30 antibody stained various porcine tissues.
- The earliest ML30-positive cells identified were embryonic hepatocytes.
- The target protein was localized to the Golgi area and mitochondria in hepatocytes.
- ML30 also bound to the cell membranes of peripheral blood lymphocytes.
Conclusions:
- The 65-kDa heat-shock protein, recognized by ML30, is expressed during porcine embryonic development.
- Hepatocytes and lymphocytes are key cell types exhibiting ML30 reactivity in pigs.
- This study provides insights into the expression and localization of a conserved heat-shock protein in porcine tissues.