1
|
Ziesemer S, Meyer S, Edelmann J, Vennmann J, Gudra C, Arndt D, Effenberg M, Hayas O, Hayas A, Thomassen JS, Kubickova B, Pöther DC, Hildebrandt JP. Target Mechanisms of the Cyanotoxin Cylindrospermopsin in Immortalized Human Airway Epithelial Cells. Toxins (Basel) 2022; 14:toxins14110785. [PMID: 36422959 PMCID: PMC9698144 DOI: 10.3390/toxins14110785] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Revised: 11/03/2022] [Accepted: 11/08/2022] [Indexed: 11/16/2022] Open
Abstract
Cylindrospermopsin (CYN) is a cyanobacterial toxin that occurs in aquatic environments worldwide. It is known for its delayed effects in animals and humans such as inhibition of protein synthesis or genotoxicity. The molecular targets and the cell physiological mechanisms of CYN, however, are not well studied. As inhalation of CYN-containing aerosols has been identified as a relevant route of CYN uptake, we analyzed the effects of CYN on protein expression in cultures of immortalized human bronchial epithelial cells (16HBE14o-) using a proteomic approach. Proteins whose expression levels were affected by CYN belonged to several functional clusters, mainly regulation of protein stability, cellular adhesion and integration in the extracellular matrix, cell proliferation, cell cycle regulation, and completion of cytokinesis. With a few exceptions of upregulated proteins (e.g., ITI inhibitor of serine endopeptidases and mRNA stabilizer PABPC1), CYN mediated the downregulation of many proteins. Among these, centrosomal protein 55 (CEP55) and osteonectin (SPARC) were significantly reduced in their abundance. Results of the detailed semi-quantitative Western blot analyses of SPARC, claudin-6, and CEP55 supported the findings from the proteomic study that epithelial cell adhesion, attenuation of cell proliferation, delayed completion of mitosis, as well as induction of genomic instability are major effects of CYN in eukaryotic cells.
Collapse
Affiliation(s)
- Sabine Ziesemer
- Animal Physiology and Biochemistry, University of Greifswald, Felix Hausdorff-Strasse 1, D-17489 Greifswald, Germany
| | - Susann Meyer
- Federal Institute for Occupational Safety and Occupational Medicine, Nöldnerstrasse 40-42, D-10317 Berlin, Germany
| | - Julia Edelmann
- Animal Physiology and Biochemistry, University of Greifswald, Felix Hausdorff-Strasse 1, D-17489 Greifswald, Germany
| | - Janita Vennmann
- Animal Physiology and Biochemistry, University of Greifswald, Felix Hausdorff-Strasse 1, D-17489 Greifswald, Germany
| | - Celine Gudra
- Animal Physiology and Biochemistry, University of Greifswald, Felix Hausdorff-Strasse 1, D-17489 Greifswald, Germany
| | - Denise Arndt
- Animal Physiology and Biochemistry, University of Greifswald, Felix Hausdorff-Strasse 1, D-17489 Greifswald, Germany
| | - Marcus Effenberg
- Animal Physiology and Biochemistry, University of Greifswald, Felix Hausdorff-Strasse 1, D-17489 Greifswald, Germany
| | - Olla Hayas
- Animal Physiology and Biochemistry, University of Greifswald, Felix Hausdorff-Strasse 1, D-17489 Greifswald, Germany
| | - Aref Hayas
- Animal Physiology and Biochemistry, University of Greifswald, Felix Hausdorff-Strasse 1, D-17489 Greifswald, Germany
| | - Johanna Sophia Thomassen
- Animal Physiology and Biochemistry, University of Greifswald, Felix Hausdorff-Strasse 1, D-17489 Greifswald, Germany
| | - Barbara Kubickova
- RECETOX, Faculty of Science, Masaryk University, Kotlarska 2, CZ-61137 Brno, Czech Republic
| | - Dierk-Christoph Pöther
- Federal Institute for Occupational Safety and Occupational Medicine, Nöldnerstrasse 40-42, D-10317 Berlin, Germany
| | - Jan-Peter Hildebrandt
- Federal Institute for Occupational Safety and Occupational Medicine, Nöldnerstrasse 40-42, D-10317 Berlin, Germany
- Correspondence: ; Tel.: +49-(0)3834-4204295
| |
Collapse
|