secreted protein yb-1 and its prognostic significance

The multifunctional protein YB-1 in prokaryotes and eukaryotes participates in various processes, among others performing the functions  of a regulator of transcription and translation of many genes. Intracellular localization and expression of YB-1 is an acknowledged prognostic marker for certain malignant tumors. However, it has recently become clear that YB-1 can be released from cells and present in body fluids, including inside vesicles. The review collected data on the secretion YB-1 (sYB-1) content in blood serum from patients with inflammatory diseases and various tumors. There is analyzed the influence of sYB-1 on normal and tumor cells. Data are presented that show that intracellular YB-1 and sYB-1 affect cells differently. The prognostic significance of sYB-1 and its form YB-1/p18 in malignant neoplasms is discussed.