title: Antibiotics delay in vitro human stem cell regrowth.
abstract: Stem cell line from human limbal area was established to study in vitro cell growth and response to the toxic effects of antibiotics used in ophthalmology in terms of cell migration rates and structure of interphase chromatin. Recovery from cellular damages caused by ophthalmologic antibiotics was mimicked by an in vitro scratch model and followed by time-lapse microscopy, scanning electronmicroscopy and chromatin image analysis. Experiments revealed that broad spectrum antibiotics, chloramphenicol (0.5-1.0mg/ml) and rifampicin (0.1-0.2mg/ml), corresponding to concentrations in common clinical practice, slowed down the regeneration process. Results show that nuclei of naturally occurring limbal cells contain the same intermediates of chromatin condensation as seen in mammalian tumor cells and follow the common pathway of chromosome condensation. These intermediates included decondensed veil-like chromatin, fibrillary chromatin, supercoiled ribbon, chromatin bodies, early linear forms and metaphase chromosomes. Upon chloramphenicol and rifampicin treatment characteristic distorsions took place in the intermediates of chromosome condensation. Damaging effects in limbal stem cells in the presence of chloramphenicol or rifampicin indicate that ophthalmologic treatment with antibiotics should be used cautiously.
authors.affiliation: Department of Microbial Biotechnology and Cell Biology, Faculty of Science, University of Debrecen, 4010, Hungary.
authors.forename: Melinda
authors.initials: M
authors.lastname: Turani
authors.affiliation: Department of Microbial Biotechnology and Cell Biology, Faculty of Science, University of Debrecen, 4010, Hungary. Electronic address: bgaspar@unideb.hu.
authors.forename: Gaspar
authors.initials: G
authors.lastname: Banfalvi
authors.affiliation: Department of Microbial Biotechnology and Cell Biology, Faculty of Science, University of Debrecen, 4010, Hungary.
authors.forename: Agota
authors.initials: A
authors.lastname: Peter
authors.affiliation: Department of Microbial Biotechnology and Cell Biology, Faculty of Science, University of Debrecen, 4010, Hungary.
authors.forename: Krisztina
authors.initials: K
authors.lastname: Kukoricza
authors.affiliation: Department of Microbial Biotechnology and Cell Biology, Faculty of Science, University of Debrecen, 4010, Hungary.
authors.forename: Gabor
authors.initials: G
authors.lastname: Kiraly
authors.affiliation: Department of Microbial Biotechnology and Cell Biology, Faculty of Science, University of Debrecen, 4010, Hungary.
authors.forename: Laszlo
authors.initials: L
authors.lastname: Talas
authors.affiliation: Department of Microbial Biotechnology and Cell Biology, Faculty of Science, University of Debrecen, 4010, Hungary.
authors.forename: Bence
authors.initials: B
authors.lastname: Tanczos
authors.affiliation: Department of Pathology, University of Debrecen, 4012, Hungary.
authors.forename: Balazs
authors.initials: B
authors.lastname: Dezso
authors.affiliation: Department of Microbial Biotechnology and Cell Biology, Faculty of Science, University of Debrecen, 4010, Hungary.
authors.forename: Gabor
authors.initials: G
authors.lastname: Nagy
authors.affiliation: Department of Ophthalmology, Faculty of Medicine, University of Debrecen, 4012, Hungary.
authors.forename: Adam
authors.initials: A
authors.lastname: Kemeny-Beke
mesh_terms: D000900:Anti-Bacterial Agents / Q000633:toxicity*; D002460:Cell Line; D049109:Cell Proliferation / Q000187:drug effects; D002701:Chloramphenicol / Q000633:toxicity*; D002843:Chromatin / Q000378:metabolism; D003315:Cornea / Q000166:cytology; D006801:Humans; D012293:Rifampin / Q000633:toxicity*; D013234:Stem Cells / Q000166:cytology / Q000187:drug effects*
chemical_list: D000900:Anti-Bacterial Agents; D002843:Chromatin; D002701:Chloramphenicol; D012293:Rifampin
keywords: Chromatin condensation; Fluorescent microscopy; Scratch wound mode l; Time-lapse imaging; Toxicity of antibiotics