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Differentiation and programmed cell death in Sa-45 tumour treated with bone inducer
T Arshavskaya1, J Erenpreisa, H Roach
1Latvian Institute of Experimental and Clinical Medicine, Riga.
Cell Biology International
|October 1, 1994
Summary
Demineralized bone matrix partially induced differentiation in rat fibrosarcoma cells. However, programmed cell death outpaced maturation, leading to incomplete differentiation in tumor cells.
Area of Science:
- Oncology
- Cell Biology
- Biomaterials
Background:
- Solid rat fibrosarcoma Sa-45 exhibits varying differentiation levels.
- Demineralized bone matrix is investigated as a potential inducer of cellular differentiation and death.
Purpose of the Study:
- To investigate the relationship between differentiation and concerted cell death in fibrosarcoma.
- To evaluate the effect of demineralized bone matrix on tumor cell differentiation and apoptosis.
Main Methods:
- Ultrastructural analysis
- Histochemical staining
- Immunochemical assays
- In vivo studies using rat fibrosarcoma models
Main Results:
- Demineralized bone matrix promoted partial differentiation in surrounding tumor cells.
- Proliferative activity decreased 3-5 fold, while the apoptotic index increased.
- Complete differentiation occurred in stromal cells, but parenchymal cells showed incomplete maturation.
Conclusions:
- Demineralized bone matrix can induce partial differentiation and apoptosis in fibrosarcoma.
- The rate of programmed cell death exceeded maturation, resulting in incomplete differentiation of tumor parenchymal cells.