Oxidant-induced decrease of the expression of nucleolar organizer regions in pig lymphocytes can be useful for monitoring the cellular effects of oxidative stress.
The technique of silver staining of nucleolar organizer regions (AgNORs) was chosen to estimate the transcriptionally active metaphase and interphase nucleolar organizer regions (NORs) in pig peripheral blood lymphocytes exposed to oxidative agents in vitro. The quantitative analysis of AgNORs was performed by using the counting method and the morphometric method. We found that hydrogen peroxide and 2,2'-azobis-(2-amidinopropane)-dihydrochloride (AAPH) induced a concentration-dependent decrease in NORs activity - in the case of metaphase the NORs activity was exclusively seen on chromosome pairs 8 - which can be considered as another estimate of cellular oxidative stress. Moreover, biomarkers of cyto- and genotoxicity, such as the percentage of apoptotic and necrotic cells, the nuclear division index (NDI) and formation of micronuclei (MN) were used to measure harmful effects provoked by the agents tested.
Department of Genetics, University of Rzeszow, Rejtana 16C, PL 35-959 Rzeszow, Poland. mawnuk@gmail.com
Maciej
M
Wnuk
Anna
A
Lewinska
Monika
M
Bugno
Grzegorz
G
Bartosz
Ewa
E
Slota
D000578:Amidines / Q000009:adverse effects / Q000494:pharmacology*; D000818:Animals; D017209:Apoptosis / Q000187:drug effects; D015415:Biomarkers / Q000378:metabolism; D033481:Chromosomes, Mammalian / Q000378:metabolism*; D006861:Hydrogen Peroxide / Q000009:adverse effects / Q000494:pharmacology*; D008214:Lymphocytes / Q000378:metabolism* / Q000473:pathology; D008677:Metaphase / Q000187:drug effects; D048629:Micronuclei, Chromosome-Defective / Q000139:chemically induced; D009152:Mutagenicity Tests / Q000379:methods; D009336:Necrosis / Q000378:metabolism / Q000473:pathology; D009697:Nucleolus Organizer Region / Q000378:metabolism* / Q000473:pathology; D016877:Oxidants / Q000009:adverse effects / Q000494:pharmacology*; D018384:Oxidative Stress / Q000187:drug effects*; D016622:Silver Staining / Q000379:methods; D013552:Swine
D000578:Amidines; D015415:Biomarkers; D016877:Oxidants; C046728:2,2'-azobis(2-amidinopropane); D006861:Hydrogen Peroxide