Large gradient high magnetic field affects the association of MACF1 with actin and microtubule cytoskeleton |
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Authors: | Ai‐Rong Qian Li‐Fang Hu Xiang Gao Wei Zhang Sheng‐Meng Di Zong‐Cheng Tian Peng‐Fei Yang Da‐Chuan Yin Yuan‐Yuan Weng Peng Shang |
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Affiliation: | Key Laboratory for Space Biosciences & Biotechnology, Institute of Special Environmental Biophysics, Faculty of Life Sciences, Northwestern Polytechnical University, Xi'an, Shaan Xi Province, PR China |
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Abstract: | The intense inhomogeneous magnetic fields acting on the diamagnetic materials naturally present in cells can generate strong magnetic forces. We have developed a superconducting magnet platform with large gradient high magnetic field (LG‐HMF), which can produce three magnetic force fields of ?1360, 0, and 1312 T2/m, and three corresponding apparent gravity levels, namely 0, 1, and 2‐g for diamagnetic materials. In this study, the effects of different magnetic force fields on osteoblast‐like cells (MG‐63 and MC3T3‐E1) viability, microtubule actin crosslinking factor 1 (MACF1) expression and its association with cytoskeleton were investigated. Results showed that cell viability increased to different degrees after exposure to 0 or 1‐g conditions for 24 h, but it decreased by about 30% under 2‐g conditions compared with control conditions. An increase in MACF1 expression at the RNA or protein level was observed in osteoblast‐like cells under the magnetic force field of ?1360 T2/m (0‐g) relative to 1312 T2/m (2‐g). Under control conditions, anti‐MACF1 staining was scattered in the cytoplasm and partially colocalized with actin filaments (AFs) or microtubules (MTs) in the majority of osteoblast‐like cells. Under 0‐g conditions, MACF1 labeling was concentrated at perinuclear region and colocalization was not apparent. The patterns of anti‐MACF1 labeling on MTs varied with MTs' changing under LG‐HMF environment. In conclusion, LG‐HMF affects osteoblast‐like cell viability, MACF1 distribution, expression, and its association with cytoskeleton to some extent. Bioelectromagnetics 30:545–555, 2009. © 2009 Wiley‐Liss, Inc. |
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Keywords: | large gradient high magnetic field superconducting magnet diamagnetic levitation simulated gravity environment microtubule actin crosslinking factor 1 |
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