Abstract
In this study, the effects of intracellular delivery of various concentrations of gallic acid (GA) as a semistable antioxidant, gallic acid-loaded mesoporous silica nanoparticles (MSNs-GA), and cellular uptake of nanoparticles into Caco-2 cells were investigated. MSNs were synthesized and loaded with GA, then characterized using transmission electron microscopy (TEM), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy, N2 adsorption isotherms, X-ray diffraction, and thermal gravimetric analysis. The cytotoxicity of MSNs and MSNs-GA at low and high concentrations were studied by means of 3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyltetrazolium bromide (MTT) test and flow cytometry. MSNs did not show significant toxicity in various concentrations (0–500 μg/ml) on Caco-2 cells. For MSNs-GA, cell viability was reduced as a function of incubation time and different concentrations of nanoparticles. The in vitro GA release from MSNs-GA exhibited the same antitumor properties as free GA on Caco-2 cells. Flow cytometry results confirmed those obtained using MTT assay. TEM and fluorescent microscopy confirmed the internalization of MSNs by Caco-2 cells through nonspecific cellular uptake. MSNs can easily internalize into Caco-2 cells without deleterious effects on cell viability. The cell viability of Caco-2 cells was affected during MSNs-GA uptake. MSNs could be designed as suitable nanocarriers for antioxidants delivery.
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Abbreviations
- MSNs:
-
Mesoporous silica nanoparticles
- GA:
-
Gallic acid
- BJH:
-
Barrett–Joyner–Halenda
- BET:
-
Brunauer–Emmett–Teller
- SEM:
-
Scanning electron microscopy
- TEM:
-
Transmission electron microscopy
- FT-IR:
-
Fourier transform infrared spectroscopy
- MTT:
-
3-[4,5-Dimethylthiazol-2-yl]-2,5-diphenyltetrazolium bromide
- ROS:
-
Reactive oxygen species
- Caco-2:
-
Human colon carcinoma
- MSNs-GA:
-
Mesoporous silica nanoparticles loaded by GA
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The authors acknowledge the Stem Cell Technology Research Center which provided some instrumental facilities.
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Rashidi, L., Vasheghani-Farahani, E., Soleimani, M. et al. A cellular uptake and cytotoxicity properties study of gallic acid-loaded mesoporous silica nanoparticles on Caco-2 cells. J Nanopart Res 16, 2285 (2014). https://doi.org/10.1007/s11051-014-2285-6
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DOI: https://doi.org/10.1007/s11051-014-2285-6