Three-dimensional tissue culture based on magnetic cell levitation.
Cell culture is an essential tool in drug discovery, tissue engineering and stem cell research. Conventional tissue culture produces two-dimensional cell growth with gene expression, signalling and morphology that can be different from those found in vivo, and this compromises its clinical relevance. Here, we report a three-dimensional tissue culture based on magnetic levitation of cells in the presence of a hydrogel consisting of gold, magnetic iron oxide nanoparticles and filamentous bacteriophage. By spatially controlling the magnetic field, the geometry of the cell mass can be manipulated, and multicellular clustering of different cell types in co-culture can be achieved. Magnetically levitated human glioblastoma cells showed similar protein expression profiles to those observed in human tumour xenografts. Taken together, these results indicate that levitated three-dimensional culture with magnetized phage-based hydrogels more closely recapitulates in vivo protein expression and may be more feasible for long-term multicellular studies.
David H. Koch Center, The University of Texas M.D. Anderson Cancer Center, Houston, Texas 77030, USA.
Glauco R
GR
Souza
Jennifer R
JR
Molina
Robert M
RM
Raphael
Michael G
MG
Ozawa
Daniel J
DJ
Stark
Carly S
CS
Levin
Lawrence F
LF
Bronk
Jeyarama S
JS
Ananta
Jami
J
Mandelin
Maria-Magdalena
MM
Georgescu
James A
JA
Bankson
Juri G
JG
Gelovani
T C
TC
Killian
Wadih
W
Arap
Renata
R
Pasqualini
D001253:Astrocytes; D045744:Cell Line, Tumor; D052203:Ferrosoferric Oxide / Q000737:chemistry*; D005909:Glioblastoma; D006046:Gold / Q000737:chemistry; D006801:Humans; D020136:Hydrogel, Polyethylene Glycol Dimethacrylate / Q000737:chemistry*; D017912:Inovirus / Q000737:chemistry; D008280:Magnetics / Q000379:methods*; D008856:Microscopy, Fluorescence; D011506:Proteins / Q000378:metabolism; D046509:Tissue Culture Techniques / Q000379:methods*
D011506:Proteins; D020136:Hydrogel, Polyethylene Glycol Dimethacrylate; D006046:Gold; D052203:Ferrosoferric Oxide