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Background . In the last few years, the cancer research had tried to identify and characterize new biochemical and molecular pathways in which the inhibition induces prosurvival mechanisms. Our work describes the expression of two different members of apoptotic regulatory pathway and their relationship with a progression of breast carcinoma.  Materials and Methods . We compared expression of genes related to apoptosis ( DR6  and  Gpm6B ) in the blood of patients suffering from stage I of breast cancer in different grades (I–IV), with healthy controls. After isolation of mRNA, transcription of mRNA into the cDNA was performed. The quantification of gene expression changes in  DR6  and  Gpm6B  was detected by RT-PCR method. Analysis at the protein level was performed by the Western blot. Results . In statistical analysis of  Dr6  mRNA level changes we detected significant increase starting in Grading 1 (G1) and reached maximal level in G3.This expression on mRNA levels was similar to protein levels, which copy rising tendency with maximal value in G3. The results of  Gpm6B  were significantly lower. Conclusion . This result showed that antiapoptotic signalling during neovascularization is increased significantly. It would be advisable in the future to study the influence of cytostatic treatment on the expression of genes related to apoptotic pathways and their relationship with progression of breast cancer tumours.

Breast Carcinoma Progression and Tumour Vascular Markers Related to Apoptotic Mechanisms