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Immunoelectron microscopy of the bone marrow mononuclears labelling with rabbit anti-mouse brain serum using
Abstract:
Ultrastructural features of mouse bone marrow mononuclears (BMM) labelled with peroxidase-anti-peroxidase (PAP) complex using rabbit anti-mouse brain serum (RAMBS) and rabbit anti-mouse brain serum, absorbed with thymocytes (RAMBST) were investigated. After incubation of cells with RAMBST which have high activity against mouse pluripotent hemopoietic stem cells (CFUs) about 0.6% of BMM were labelled. According to their fine structure these cells were similar to those described earlier as presumptive pluripotent hematopoietic stem cells (PHSC). After incubation with RAMBS 1.9% of BMM were labelled, including cells marked by RAMBST and typical small lymphocytes with ultrastructure of T-lymphocytes.
Insights
Researchers investigated mouse bone marrow mononuclear cells (BMM) using specific antibodies. They identified presumptive pluripotent hematopoietic stem cells (PHSC) and T-lymphocytes within the BMM population.
Area of Science:
- Hematology
- Immunology
- Cell Biology
Background:
- Bone marrow mononuclear cells (BMM) contain various cell types, including hematopoietic stem cells.
- Identifying and characterizing pluripotent hematopoietic stem cells (PHSC) is crucial for understanding hematopoiesis.
Purpose of the Study:
- To investigate the ultrastructural features of mouse bone marrow mononuclear cells (BMM).
- To identify and characterize cells with potential pluripotent hematopoietic stem cell activity using specific antibody labeling.
Main Methods:
- Utilized the peroxidase-anti-peroxidase (PAP) complex for immunolabeling.
- Employed rabbit anti-mouse brain serum (RAMBS) and absorbed rabbit anti-mouse brain serum (RAMBST).
- Analyzed labeled cells using electron microscopy to determine ultrastructural characteristics.
Main Results:
- RAMBST, active against pluripotent hematopoietic stem cells (CFUs), labeled approximately 0.6% of BMM.
- These RAMBST-labeled cells exhibited ultrastructural similarities to previously described presumptive pluripotent hematopoietic stem cells (PHSC).
- RAMBS labeled 1.9% of BMM, including RAMBST-positive cells and lymphocytes with T-lymphocyte ultrastructure.
Conclusions:
- The study successfully identified and characterized presumptive pluripotent hematopoietic stem cells (PHSC) within mouse bone marrow mononuclear cells (BMM).
- The findings suggest that specific antibody labeling can distinguish PHSC and T-lymphocytes based on their ultrastructural morphology.