Innovative fluorescent magnetic albumin microbead-assisted cell labeling and intracellular imaging of glioblastoma cells

• Published in: Biosensors & bioelectronics Vol. 54; pp. 55 - 63
• Main Authors: Wang, Xueqin, Wei, Fang, Yan, Shuang, Zhang, Huiru, Tan, Xiaorong, Zhang, Lu, Zhou, Guangzhou, Cui, Liuqing, Li, Cuixiang, Wang, Liang, Li, Yatao
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 15.04.2014; Elsevier
• Subjects: Biological and medical sciences; Biosensing Techniques - methods; Biotechnology; Cell labeling; Cell Line, Tumor; Fluorescein isothiocyanate (FITC); Fluorescein-5-isothiocyanate - analogs & derivatives; Fluorescein-5-isothiocyanate - analysis; Fluorescent Dyes - analysis; Fundamental and applied biological sciences. Psychology; Glioblastoma - diagnosis; Glioblastoma - pathology; Humans; Intracellular imaging; Magnetic albumin microbeads (MAMbs); Magnetic Phenomena; Magnets - analysis; Microscopy, Fluorescence - methods; Microspheres; Serum Albumin - analysis; Staining and Labeling - methods; U251 glioblastoma cells; Cell labeling; Fluorescein isothiocyanate (FITC); Intracellular imaging; Magnetic albumin microbeads (MAMbs); U251 glioblastoma cells; Glioblastoma; Albumin; Fluorescence; Imagery; Fluorescein; Tagging; Intracellular; Isothiocyanates
• ISSN: 0956-5663; 1873-4235
• DOI: 10.1016/j.bios.2013.10.041

Superparamagnetic nanoparticle-based polymer microbeads utilized as carriers are attractive materials widely applied in the biomedical field. However, the deficiency of toxicity, biocompatibility, and biodegradability for polymer materials often limits the application of these microbeads. In the present study, magnetic albumin microbeads (MAMbs), i.e., human serum albumin-coated γ-Fe2O3 nanoparticles, are synthesized to label human U251 glioblastoma multiforme cells. The effects of MAMbs on the biological behavior of U251 glioblastoma cells, including their proliferation, cell viability, cytoskeletal structure, cell cycle, and apoptosis rate, are investigated. Moreover, fluorescein isothiocyanate (FITC)-MAMbs are fabricated by reaction with fluorescent dye FITC used for intracellular imaging of U251 glioblastoma cells. MAMbs possess undetectable cytotoxicity and excellent biocompatibility with U251 glioblastoma cells, as demonstrated by the biological behavior and morphology of U251 cells exposed to MAMbs. Furthermore, the constructed fluorescent MAMbs allow effective intracellular imaging, as illustrated by fluorescence microscopic analysis. The fabricated fluorescent MAMbs have promising perspectives in biomedical research, especially in cell-targeted labeling and intracellular fluorescence magnetic dual-mode imaging in cancer-targeted diagnosis and therapy. •Magnetic albumin microbeads (MAMbs) are fabricated and treated with glioblastoma cells to investigate its effects on the bio-behaviors of cells.•The fabricated MAMbs show good biocompatibility and non-toxicity, and are used to efficiently label the human U251 glioblastoma cells.•The fluorescent FITC-modified MAMbs are used for cell labeling and intracellular imaging of U251 glioblastoma cells.•The constructed fluorescent magnetic albumin microbeads allow an effective intracellular imaging in glioblastoma cells.