title: [Epithelial cadherins and associated molecules in invasive lobular breast cancer].
abstract: OBJECTIVE
  to estimate the expression of cell adhesion molecules E- and P-cadherin, as well as that of cadherin-catenin complexes in invasive lobular breast cancer (BC) cells.
  
  
  METHODS
  250 cases of postoperative material from patients diagnosed with invasive lobular BC were studied. The expressions of cell adhesion molecules E-cadherin, P-cadherin, β-catenin, p120 catenin, and vimentin were determined by immunohistochemical assay in all cases. The examined cases were divided into molecular biological subtypes, based on the evaluation of estrogen receptors (ER), progesterone receptors (PR), HER-2/neu, and Ki-67 proliferative index.
  
  
  RESULTS
  The membrane expression of E-cadherin on the tumor cells was found to be preserved in 93%; the cytoplasmic expression of β-catenin and p120-catenin appeared in 60 and 72% of cases, respectively. The expression of P-cadherin was detected in 82% of cases. The coexpression of E- and P-cadherin was noted in 90% of all the examined cases. There was a correlation between the expression of E- and P-cadherins (V=0.34; p<0.05).
  
  
  CONCLUSIONS
  The BC cells showed the coexpression of E- and P-cadherins, as well as release of the molecules β- and p120-catenins into the cytoplasm of tumor cells, which leads to the activation of intracellular mechanisms for changing the structure of the cytoskeleton and the level of proliferation. The above-mentioned mechanisms are accompanied by the activation of epithelial-mesenchymal transition. The intracellular mechanisms resulted in progressive cancer and its metastasis.
authors.affiliation: Institute for Medical Cell Technologies, Ministry of Health of the Sverdlovsk Region, Yekaterinburg, Russia; Ural State Medical University, Ministry of Health of Russia, Yekaterinburg, Russia.
authors.forename: Yu M
authors.initials: YM
authors.lastname: Brilliant
authors.affiliation: Institute for Medical Cell Technologies, Ministry of Health of the Sverdlovsk Region, Yekaterinburg, Russia.
authors.forename: A A
authors.initials: AA
authors.lastname: Brilliant
authors.affiliation: Institute for Medical Cell Technologies, Ministry of Health of the Sverdlovsk Region, Yekaterinburg, Russia; Ural State Medical University, Ministry of Health of Russia, Yekaterinburg, Russia.
authors.forename: S V
authors.initials: SV
authors.lastname: Sazonov
mesh_terms: D015820:Cadherins / Q000096:biosynthesis* / Q000235:genetics; D051177:Catenins / Q000096:biosynthesis* / Q000235:genetics; D049109:Cell Proliferation / Q000235:genetics; D058750:Epithelial-Mesenchymal Transition / Q000235:genetics; D005260:Female; D015972:Gene Expression Regulation, Neoplastic; D006801:Humans; D009361:Neoplasm Invasiveness / Q000235:genetics; D011379:Prognosis; D018719:Erb-b2 Receptor Tyrosine Kinases / Q000096:biosynthesis; D064726:Triple Negative Breast Neoplasms / Q000145:classification / Q000235:genetics* / Q000473:pathology; D014746:Vimentin / Q000096:biosynthesis / Q000235:genetics; D051176:beta Catenin / Q000096:biosynthesis* / Q000235:genetics; D000095002:Delta Catenin
chemical_list: D015820:Cadherins; D051177:Catenins; D018719:Erb-b2 Receptor Tyrosine Kinases; D014746:Vimentin; D051176:beta Catenin; D000095002:Delta Catenin; C512197:CDH3 protein, human; C508053:ERBB2 protein, human; C000722347:CTNND1 protein, human