SNAI1 and cancer: E-cadherin (encoded by CDH1 gene), N-cadherin (CDH2), fibronectin (FN1), matrix metalloproteinase MMP-2/9 (MMP-2/9), occludin (OCLN), SNAIL (SNAI1), SLUG (SNAI2), urokinase-type plasminogen activator (uPA, encoded by PLAU gene), vimentin (VIM), ZO-1 (TJP1), and TWIST (TWIST) are considered as one of markers of cancer invasion and metastasis, therefore we decided to quantitatively assess the influence of tested agents on their mRNA expression levels.