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Author Bolzán, Ro D. ♦ Correa, Marı́a V. ♦ Bianchi, Martha S.
Source CiteSeerX
Content type Text
File Format PDF
Subject Domain (in DDC) Computer science, information & general works ♦ Data processing & computer science
Subject Keyword Bleomycin-induced Chromosome Damage ♦ Hamster Cell ♦ Culture Medium ♦ G2 Phase ♦ Cell Cycle ♦ Significant Increase ♦ Radiomimetic Antibiotic Bleomycin ♦ Iu Ml ♦ Dna Synthesis ♦ Total Chromosome Damage ♦ Whereas Treatment ♦ Blm Treatment ♦ Strong Inhibitory Effect ♦ Maximum Inhibition ♦ Inhibitory Effect ♦ Control Value ♦ Chinese Hamster ♦ Chromosome Damage ♦ Chromosomal Aberration ♦ Blm-induced Ca ♦ Recombinant Ifn-alpha-2a
Abstract The effect of recombinant interferon-alpha-2a (rIFN-alpha-2a) on the induction of chromosomal aberrations (CAs) by the radiomimetic antibiotic bleomycin (BLM, 5g/ml, 30 min, 37 ◦C) in Chinese hamster ovary (CHO) cells was investigated. Recombinant IFN-alpha-2a (4500–180,000 IU/ml) was added to the cell cultures 0.5 or 24 h before BLM (and left in the culture medium until the end of treatments) or immediately after BLM treatment (and left in the culture medium until harvesting). Cells were sampled at 18 or 2.5 h after the end of treatments, in order to determine, respectively, the effect of rIFN-alpha-2a on the total chromosome damage induced by BLM and on the chromosome damage induced by this antibiotic in the G2 phase of the cell cycle. A statistically significant increase in the frequency of CAs was observed following treatment with BLM (P < 0.05), whereas treatments with rIFN-alpha-2a alone did not produce any significant increase of CAs over control values (P> 0.05). The yield of CAs by BLM was significantly inhibited by rIFN-alpha-2a (P < 0.05, 65.3 % maximum inhibition). A strong inhibitory effect (around 80%) of rIFN-alpha-2a on the yield of BLM-induced CAs in the G2 phase of the cell cycle was also observed. It is suggested that the inhibitory effect of rIFN-alpha-2a on the induction of CAs by BLM is mainly due to the stimulation of DNA synthesis and repair by the cytokine.
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research
Education Level UG and PG ♦ Career/Technical Study
Publisher Date 2002-01-01