title: Human Brain Malignant Glioma (BMG-1) 3D Aggregate Morphology and Screening for Cytotoxicity and Anti-Proliferative Effects.
abstract: Two interesting aspects of cell lines grown in 3 Dimensional (3D) conditions are their distinct morphology and production of extracellular matrix (ECM). Also, it is known that 3D aggregates have different susceptibilities to damage-inducing agents compared to their 2D monolayer counterparts. We describe the effect of ECM on 3D aggregate morphology, the effect of cisplatin, bleomycin, and UV on the 3D aggregates and 2 Dimensional (2D) monolayers of the BMG-1 cell line. We also present a rapid method for analyzing cytotoxicity and anti-proliferative effects of 3D aggregates in 96-well plates. We utilized a single-step protocol using the dye resazurin. BMG-1 cells formed floating aggregates on 1% agarose hydrogels. The extent of ECM formed by them was dependent on number of cells seeded irrespective of the seeding density, which in turn directed the 3D aggregate compactness. The 3D aggregates were less susceptible to cisplatin and UV-induced cytotoxicity compared to 2D counterparts. The IC50 value of cisplatin was elevated at 210 μg/ml for the aggregates compared to 170 μg/ml for the monolayers. Exposure to UV for 0, 10, 20, and 30 min gave inhibition values of 2.98%, 8%, 22.99%, and 31.8% for the aggregates as compared to 3.06%, 7.5%, 39.4%, and 46.7% for the monolayers. While bleomycin-induced effects were unapparent when analyzed by vital staining for the doses used, the rapid, single-step method in 96-well plates was able to provide a dose-response for cytotoxicity and anti-proliferative effects. Also, comparative analysis of results obtained from vital staining and the single-step method demonstrates the reliability of the assay described. J. Cell. Physiol. 232: 685-690, 2017. © 2016 Wiley Periodicals, Inc.
authors.affiliation: Department of Human Genetics, Faculty of Biomedical Sciences, Technology and Research, Sri Ramachandra University, Porur, Chennai, India.
authors.forename: Maddaly
authors.initials: M
authors.lastname: Ravi
authors.affiliation: Department of Human Genetics, Faculty of Biomedical Sciences, Technology and Research, Sri Ramachandra University, Porur, Chennai, India.
authors.forename: Aarthi
authors.initials: A
authors.lastname: Ramesh
authors.affiliation: Department of Human Genetics, Faculty of Biomedical Sciences, Technology and Research, Sri Ramachandra University, Porur, Chennai, India.
authors.forename: Aishwarya
authors.initials: A
authors.lastname: Pattabhi
mesh_terms: D001761:Bleomycin / Q000494:pharmacology; D001932:Brain Neoplasms / Q000473:pathology*; D002449:Cell Aggregation / Q000187:drug effects / Q000528:radiation effects; D016923:Cell Death / Q000187:drug effects / Q000528:radiation effects; D045744:Cell Line, Tumor; D049109:Cell Proliferation / Q000187:drug effects / Q000528:radiation effects; D048430:Cell Shape / Q000187:drug effects / Q000528:radiation effects; D002945:Cisplatin / Q000494:pharmacology; D005910:Glioma / Q000473:pathology*; D006801:Humans; D020136:Hydrogel, Polyethylene Glycol Dimethacrylate; D021621:Imaging, Three-Dimensional; D014466:Ultraviolet Rays
chemical_list: D001761:Bleomycin; D020136:Hydrogel, Polyethylene Glycol Dimethacrylate; D002945:Cisplatin