Abstract
The aim of the present investigation was to deliver Gemcitabine Hydrochloride (GmcH), an anticancer bioactive, specifically to lung tumor cells using mannosylated 4.0G poly(propyleneimine) dendrimers (M-PPI). 4.0G poly(propyleneimine) (PPI) dendrimers was synthesized using ethylenediamine as core and conjugated with mannose by ring opening reactions, followed by Schiff’s reaction in the presence of sodium acetate buffer (pH 4.0). Synthesized PPI dendrimers and mannose-conjugated dendrimers were characterized using IR, NMR spectroscopy, and scanning electron microscopy. GmcH was loaded into PPI and M-PPI dendrimers using equilibrium dialysis method to develop the formulations, GmcH-PPI and GmcH-M-PPI, respectively. The developed formulations were evaluated for drug loading, in vitro release kinetics, in vitro stability, hemolytic toxicity, cytotoxicity, pharmacokinetic, and biodistribution studies. The dendrimeric formulation of GmcH showed pH-sensitive release with faster release at acidic pH, i.e., pH 4.0 in comparison with physiological pH 7.4. M-PPI conjugate showed significant reduction in hemolytic toxicity as compared to plain 4.0G PPI dendrimers towards human erythrocytes. In the cytotoxicity studies with A-549 lung adenocarcinoma cell line, the GmcH-M-PPI formulation showed the lowest IC50 value. Further, the pharmacokinetic and tissue distribution studies of free drug GmcH, GmcH-PPI, and GmcH-M-PPI in albino rats of Sprague–Dawley strain suggested the mean residence time of GmcH-M-PPI conjugate to be significantly higher (24.85 h) than free GmcH and GmcH-PPI. Deposition of drug (396.1 ± 4.7 after 2 h) in lung was found to be significantly higher with GmcH-M-PPI formulation in comparison with Gmch and GmcH-PPI.
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Abbreviations
- GmcH:
-
Gemcitabine Hydrochloride
- M-PPI:
-
Mannosylated poly(propyleneimine) dendrimer
- GmcH-PPI:
-
Gemcitabine-loaded plain poly(propyleneimine) dendrimer
- GmcH-M-PPI:
-
Gemcitabine-loaded mannosylated poly(propyleneimine) dendrimer
- 4.0G PPI:
-
4th generation poly(propyleneimine) dendrimers
- TEM:
-
Transmission electron microscopy
- 1H NMR:
-
Proton nuclear magnetic resonances
- FTIR:
-
Fourier transform infrared spectroscopy
- UV:
-
Ultra violet spectroscopy
- A-549:
-
Lung adenocarcinoma epithelial cell lines
- MTT:
-
Methyl thiazole tetrazolium assay
- IC50 :
-
Concentration of drug for 50 % inhibition of cell growth
- MRT:
-
Mean residence time
- PTA:
-
Phosphotungustic acid
- PBS:
-
Phosphate-buffered saline
- RBCs:
-
Red blood cells
- ACN:
-
Acrylonitrile
- MWCO 12–14 kDa:
-
Molecular weight cut off 12–14 kDa
- EDA:
-
Ethylenediamine
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Acknowledgments
The author Namrata Soni is grateful to AICTE for providing financial support in form of JRF. All the authors are thankful to SAIF, Punjab University, Chandigarh, for 1H NMR and FTIR spectroscopy; AIIMS, New Delhi for TEM and TATA Memorial Institute, Mumbai for cell line studies.
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Soni, N., Jain, K., Gupta, U. et al. Controlled delivery of Gemcitabine Hydrochloride using mannosylated poly(propyleneimine) dendrimers. J Nanopart Res 17, 458 (2015). https://doi.org/10.1007/s11051-015-3265-1
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DOI: https://doi.org/10.1007/s11051-015-3265-1