Abstract
Bone is one of the main target organs for the lanthanides (Ln). Biodistribution studies of Tm-based compounds in vivo showed that bone had significant uptake. But the effect of Tm3+ on primary mouse bone marrow stromal cells (BMSCs) has not been reported. So we investigated the effect and underlying mechanisms of Tm3+ on BMSCs. Cell viability, cell apoptosis, reactive oxygen species (ROS) level, lactate dehydrogenase (LDH) activity and mitochondrial membrane potential (MMP) were studied. The results indicated that Tm3+ increased the viability of BMSCs at concentrations of 1 × 10−7, 1 × 10−6, 1 × 10−5, and 1 × 10−4 mol/L in a dose-dependent manner, turned to decrease the viability of BMSCs at the highest concentration of 1 × 10−3 mol/L for 24, 48, and 72 h. Tm3+ at 1 × 10−3 mol/L promoted apoptosis of BMSCs, increased the ROS and LDH levels, and decreased MMP in BMSCs. Taken together, we demonstrated that Tm3+ at 1 × 10−3 mol/L might induce cellular apoptosis through mitochondrial pathway. These results may be helpful for more rational application of Tm-based compounds in the future.






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Abbreviations
- BMSCs:
-
Bone marrow stromal cells
- CEST:
-
Chemical exchange-dependent saturation transfer
- DAPI:
-
4′,6-Diamidino-2-phenylindole
- DCFH-DA:
-
2′,7′-Dichlorofluorescein diacetate
- DMEM:
-
Dulbecco’s modified Eagle’s medium
- DMSO:
-
Dimethyl sulfoxide
- DOTA:
-
1,4,7,10-Tetraazacyclododecane-1,4,7,10-tetraacetate
- DOTMA:
-
1,4,7,10-Tetraazacyclododecane-1,4,7,10-tetramethyl-1,4,7,10-tetraacetate
- DOTP:
-
1,4,7,10-Tetraazacyclododecane-N,N′,N″,N′″-tetra (methylenephosphonate)
- EDTMP:
-
Ethylene diamine tetramethylene phosphonate
- FITC:
-
Fluorescein isothiocyanate
- FTIR:
-
Fourier transform infrared spectrometer
- KM:
-
Kunming
- LDH:
-
Lactate dehydrogenase
- Ln:
-
Lanthanides
- MMP:
-
Mitochondrial membrane potential
- MR:
-
Magnetic resonance
- MRI:
-
Magnetic resonance imaging
- MTT:
-
3-[4,5-Dimetylthiazole-2-yl]-2,5-diphenyl tetrazolium bromide
- NBS:
-
Neonatal bovine serum
- OD:
-
Optical density
- PBS:
-
Phosphate buffered saline
- PI:
-
Propidium iodide
- Rh123:
-
Rhodamine 123
- ROS:
-
Reactive oxygen species
- SD:
-
Standard deviation
- SPF:
-
Specific pathogen free
- sub-G1:
-
Subdiploid DNA contents
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Acknowledgments
This work was supported in part by Chinese Natural Science Foundation project (no. 21271059), Research Fund for the Doctoral Program of Higher Education of China (no. 20111301110004) and the Natural Science Foundation of Hainan Province, China (no. 213017).
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Dai, C., Chen, G., Dong, Y. et al. Thulium Ion Promotes Apoptosis of Primary Mouse Bone Marrow Stromal Cells. Biol Trace Elem Res 156, 188–195 (2013). https://doi.org/10.1007/s12011-013-9825-2
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DOI: https://doi.org/10.1007/s12011-013-9825-2

