Effect of collagen substrates on proteomic modulation of breast cancer cells.
We have previously described the occurrence, in breast and colon cancer extra-cellular matrix, of an oncofoetal form of collagen, OF/LB, able to induce an increase in cell proliferation and motility in the breast cancer cell line 8701-BC. It also caused an increased amount of type V collagen which appears to exert an anti-proliferative effect on the same cells. The aim of the present study was to investigate, at the proteomic level, the effect of OF/LB and type V collagens used as substrates for neoplastic cell growth. Due to the complexity of a whole proteomic profile, a subset of significant protein classes was used to assess variations in protein expression levels. For this study we adopted a multivariate statistical procedure that allows a global view of the variations induced by different growth conditions, when several variables have to be analyzed simultaneously. The results of this research indicate that in response to different growth substrates, chaperons and heat shock proteins contributed most to the dissimilarity in levels of expression of the selected protein spots. Moreover, we observed that different isoforms of the same protein showed independent levels of expression from one another in relation to the different collagen treatments.
Dipartimento di Oncologia Sperimentale e Applicazioni Cliniche, Universtià di palermo, Italy.
Simona
S
Fontana
Ida
I
Pucci-Minafra
Michel
M
Becchi
Anne-Marie
AM
Freyria
Salvatore
S
Minafra
D001943:Breast Neoplasms / Q000378:metabolism* / Q000473:pathology; D002455:Cell Division; D045744:Cell Line, Tumor; D003094:Collagen / Q000737:chemistry*; D015180:Electrophoresis, Gel, Two-Dimensional; D006360:Heat-Shock Proteins / Q000378:metabolism; D006358:Hot Temperature; D006801:Humans; D007091:Image Processing, Computer-Assisted; D015999:Multivariate Analysis; D011506:Proteins / Q000737:chemistry; D020543:Proteome; D040901:Proteomics / Q000379:methods*; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization
D006360:Heat-Shock Proteins; D011506:Proteins; D020543:Proteome; D003094:Collagen