Subchronic exposure of rats to sublethal dose of microcystin-YR induces DNA damage in multiple organs

Filipič, Metka (author), Žegura, Bojana (author), Sedmak, Bojan (author), Horvat-Žnidaršič, Irena (author), Milutinović Živin, Aleksandra (author), Šuput, Dušan (author)

Background. Microcystins (MCs) are cyclic heptapeptides that are considered tobe liver specific toxins. They are potent tumour promoters and recent studies indicate that they are also genotoxic. In this study we measured DNA damage in lymphocytes, liver, kidney (cortex and medulla), lung, spleen and brain cells of male Fisher F344 rats that were exposed to sublethal dose (every second day 10 Ugžkg b.w.č i.p) of microeysrin-YR (MCYR) for one month. Methods. At the end of exposure the animals were sacrificed, the lymphocytes were isolated from blood taken from jugular vein, liver cells were obtained byperfusion with collagenase A and the cells from other organs were isolated by incubating small tissue pieces with eollagenase A. The DNA damage in isolated cells was measured with the single cells gel electrophoresis (SCGE) also called the comet assay. Results. A significant increase of the % tail DNAin MCYR-exposed animals compared to the nonexposed control ones was observed in brain (2.5 fold), liver (2.1 fold), kidney medulla (1.9 fold), kidney cortex (1.8 fold) and lung (1.7 fold) cells, while the DNA from lymphocytes and spleen cells was not affected. Conclusion. This study demonstrated that subehronic exposure to sublethal doses of MCs can induce systemicgenotoxicity in mammals, and it affects not only the liver but also other vital organs.

• Language: English
• Keywords: DNA damage, comet assay, cyanobacteria, bacterial toxins, rats, inbred F344
• Work type: Not categorized
• Typology: 1.01 - Original Scientific Article
• Organization: BF - Biotechnical Faculty
• Publisher: Croatian Medical Association - Croatian Society of Radiology
• Year: 2007
• Number of pages: Str. 15-22
• Numbering: Vol. 41, no. 1
• PID: 20.500.12556/RUL-59584
• UDC: 616
• ISSN on article: 1318-2099
• COBISS.SI-ID: 1724751
• Publication date in RUL: 10.07.2015

Record is a part of a journal

• Title: Radiology and oncology
• Shortened title: Radiol. oncol.
• Publisher: Slovenian Medical Society - Section of Radiology, Croatian Medical Association - Croatian Society of Radiology
• ISSN: 1318-2099
• COBISS.SI-ID: 32649472

Secondary language

• Language: Slovenian
• Title: [Podaljšana izpostavljenost podgan neletalnim odmerkom mikrocistina-LR povzroči poškodbe DNA v različnih organih]