Binase penetration into alveolar epithelial cellsdoes not induce cell death


1. Max-Planck-Institute for Heart and Lung Research Kazan Federal University
2. Kazan Federal University
3. Max-Planck-Institute for Heart and Lung Research
4. Department of Biochemistry, Medical School, Justus-Liebig-University
Type: Experimental/clinical study
DOI: 10.18097/pbmc20125803272      UDK: 577.29; 615.015; 616.006      PubMed Id: 22856132
Year: 2012 vol: 58  issue:3  pages: 272-280
Abstract: Microbial ribonucleases possess a broad spectra of biological activities, demonstrating stimulating properties at low concentrations and cytotoxicity and genotoxicity at high concentrations. The mechanisms of their penetration into the cells are not clear so far. This research is aimed to the study of Bacillus intermedius RNase (binase) penetration in alveolar lung epithelial cells - pneumocytes of type II. Using immunofluorescence we have shown for the first time have internalization of binase by primary non-differentiated pneumocytes АТII. The enzyme did not penetrate in pneumocytes MLE-12, which also derived from type II cells. However, binase was cytotoxic towards tumor MLE-12 cells, but not АТII cells. The obtained results testified the higher sensitivity of tumor cells towards binase compared with normal cells, and also showed that penetration of the enzyme into alveolar cells did not directly correlated with the cell death.
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Reference: Cabrera Fuentes H.A., Kalacheva N.V., Mukhametshina R.T., Zelenikhin P.V., Kolpakov A.I., Barreto G., Preissner K.T., Ilinskaya O.N., Binase penetration into alveolar epithelial cellsdoes not induce cell death, Biomeditsinskaya khimiya, 2012, vol: 58(3), 272-280.
This paper is also available as the English translation:10.1134/S199075081204004X
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