title: Evaluation of the toxic potential of cefotaxime in the third instar larvae of transgenic Drosophila melanogaster.
abstract: The present study was carried out to evaluate the toxic potential of cefotaxime in the third instar larvae of transgenic Drosophila melanogaster (hsp70-lacZ)Bg(9). Cefotaxime at final concentration of 10, 20, 40, 60 and 80 μg/ml was mixed in the diet and the larvae were exposed to the selected doses for 6, 12, 24, 48 h. The hsp70 expression, trypan blue exclusion test, in situ histochemical β-galactosidase activity, lipid peroxidation, total protein content, glutathione (GSH) content, glutathione-S-transferase (GST) activity, protein carbonyl content, caspase 3 and 9 activity, apoptotic index and comet assay were taken as parameters for the study. The larvae exposed to 40, 60 and 80 μg/ml for 12, 24 and 48 h showed a dose and duration dependent significant increase in the activity of β-galactosidase and lipid peroxidation but decrease in the total GSH content as compared to unexposed larvae. The decrease in protein content was observed in the larvae exposed to 40, 60 and 80 μg/ml of cefotaxime for 24 and 48 h. The larvae exposed to 40, 60 and 80 μg/ml of cefotaxime for 24 and 48 h showed a dose and duration dependent increase in the tissue damage, GST, caspase 3 and 9 activity, PC content, apoptosis and the DNA tail length (comet assay). The result suggests that the cefotaxime is toxic at 40, 60 and 80 μg/ml of doses for the third instar larvae of transgenic D. melanogaster (hsp70-lacZ)Bg(9). Cefotaxime at 10 and 20 μg/ml was not toxic for any duration of exposure.
authors.affiliation: Drosophila Transgenic Laboratory, Section of Genetics, Department of Zoology, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, Uttar Pradesh 202002, India.
authors.lastname: Rahul
authors.affiliation: Drosophila Transgenic Laboratory, Section of Genetics, Department of Zoology, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, Uttar Pradesh 202002, India.
authors.forename: Smita
authors.initials: S
authors.lastname: Jyoti
authors.affiliation: Drosophila Transgenic Laboratory, Section of Genetics, Department of Zoology, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, Uttar Pradesh 202002, India.
authors.forename: Falaq
authors.initials: F
authors.lastname: Naz
authors.affiliation: Drosophila Transgenic Laboratory, Section of Genetics, Department of Zoology, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, Uttar Pradesh 202002, India. Electronic address: yasir_hasansiddique@rediffmail.com.
authors.forename: Yasir Hasan
authors.initials: YH
authors.lastname: Siddique
mesh_terms: D000818:Animals; D030801:Animals, Genetically Modified; D000900:Anti-Bacterial Agents / Q000633:toxicity*; D017209:Apoptosis; D002439:Cefotaxime / Q000633:toxicity*; D004249:DNA Damage / Q000187:drug effects; D004331:Drosophila melanogaster / Q000187:drug effects* / Q000235:genetics / Q000378:metabolism; D005978:Glutathione / Q000378:metabolism; D018840:HSP70 Heat-Shock Proteins / Q000235:genetics; D007814:Larva / Q000187:drug effects / Q000235:genetics / Q000378:metabolism; D015227:Lipid Peroxidation / Q000187:drug effects; D018384:Oxidative Stress / Q000187:drug effects; D050050:Protein Carbonylation / Q000187:drug effects; D001616:beta-Galactosidase / Q000378:metabolism
chemical_list: D000900:Anti-Bacterial Agents; D018840:HSP70 Heat-Shock Proteins; D001616:beta-Galactosidase; D005978:Glutathione; D002439:Cefotaxime
keywords: Comet assay; Drosophila melanogaster (hsp70-lacZ)Bg(9); Oxidative stress; Tissue damage; β-Galactosidase