Abstract
Purpose
The intention of the study was to co-delivery gemcitabine and cisplatin with totally different nature by prodrug and micelle strategy to improve its in vivo stability and antitumor effect.
Methods
A prodrug of gemcitabine (mPEG-PLG-GEM) was synthesized through the covalent conjugation between the primary amino group of gemcitabine and the carboxylic group of poly (L-glutamic acid)-g-methoxy poly (ethylene glycol) (mPEG-PLG). It was prepared into micelles by a solvent diffusion method, and then combined with cisplatin through chelation to prepare gemcitabine and cisplatin co-loaded mPEG-PLG micelles (mPEG-PLG-GEM@CDDP micelles).
Results
Gemcitabine and cisplatin in each micelle group were released more slowly than in solutions. In addition, pharmacokinetics behaviors of them were improved after encapsulated in prodrug micelles. T1/2z of gemcitabine and cisplatin encapsulated in micelles were prolonged to 6.357 h (mPEG-PLG-GEM), 10.490 h (mPEG-PLG@CDDP), 5.463 h and 12.540 h (mPEG-PLG-GEM@CDDP) compared with GEM@CDDP solutions (T1/2z = 1.445 h and 7.740 h). The ratio of synergy between gemcitabine and cisplatin (3:1 ~ 1:1(n/n)) was guaranteed in the systemic circulation, thus improving its antitumor effect. The results of biochemical analysis showed that GEM@CDDP-Sol was more toxic to kidneys and marrow compared with mPEG-PLG-GEM@CDDP micelles.
Conclusions
By prodrug strategy, gemcitabine and cisplatin with totally different nature were prepared into micelles and obtained a better pharmacokinetic behavior. And the dual drug delivery system performed a better in vivo stability and antitumor effect compared with each single drug delivery system in the experiment.
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Abbreviations
- GEM:
-
Gemcitabine hydrochloride
- dFdCDP:
-
Nucleoside diphosphate
- dFdCTP:
-
Nucleoside triphosphate
- dCTP:
-
Deoxynucleotide
- CDDP:
-
Cisplatin
- EDC·HCL:
-
1-Ethyl-3-[3-dimethylaminopropyl] carbodiimide hydrochloride
- NHS:
-
N-Hydroxysuccinimide
- DLC:
-
Drug loading content
- DLE:
-
Drug loading efficiency
- PDI:
-
Polydispersity index
- DLS:
-
Dynamic light scattering
- TEM:
-
Transmission electron microscopy
- CMC:
-
Critical micelle concentration
- CI:
-
Combination index
- RBC:
-
Red blood cell
- HR:
-
Hemolysis ratio
- HE:
-
Hematoxylin and eosin
- CLSM:
-
Confocal laser scanning microscopy
- AUC:
-
Area under the concentration–time curve
- TIR:
-
Tumor inhibition rate
- mPEG-PLG:
-
Poly (L-glutamic acid)-g-methoxy poly(ethylene glycol)
- mPEG-PLG-GEM:
-
Prodrug of gemcitabine
- mPEG-PLG-GEM@CDDP:
-
Gemcitabine and cisplatin co-loaded mPEG-PLG micelles
- GEM@CDDP-Sol:
-
Gemcitabine hydrochloride and cisplatin solutions
- RR:
-
Ribonucleotide reductase
- DMF:
-
N,N-Dimethylformamide
- 1H-NMR:
-
Nuclear Magnetic Resonance
- FTIR:
-
Fourier Transform infrared spectroscopy
- RP-HPLC:
-
Reversed phase high performance liquid chromatography
- DMEM:
-
Dulbecco's modified Eagle's medium
- mPEG-PLG-FITC:
-
FITC loaded mPEG-PLG micelles
- PBS:
-
Phosphate buffered solution
- DAPI:
-
4',6-Diamidino-2-phenylindol, 2-(4-amidinophenyl)-1H -indole-6-carboxamidine
- LC–MS/MS:
-
Liquid chromatograph-mass spectrometer
- WBC:
-
White blood cell
- HGB:
-
Hemoglobin
- PLT:
-
Platelet
- AST:
-
Aspartate Transaminase
- ALT:
-
Alanine transaminase
- BUN:
-
Blood urea nitrogen
- CR:
-
Creatinine
- GEM-Sol:
-
Gemcitabine hydrochloride solutions
- CDDP-Sol:
-
Cisplatin solutions
- FITC-Sol:
-
Fluorescein isothiocyanate isomer solutions
- PEG:
-
Polyethylene glycol
- Vz :
-
Apparent volume of distribution
- CLz :
-
Clearance
- PK:
-
Pharmacokinetics
- t1/2z :
-
Half life
- Cmax :
-
Peak Concentration
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We sincerely thank Amanda Pearce for the linguistic assistance during the revision of this manuscript.
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Ding, N., Zhao, Z., Yin, N. et al. Co-delivery of gemcitabine and cisplatin via Poly (L-glutamic acid)-g-methoxy poly (ethylene glycol) micelle to improve the in vivo stability and antitumor effect. Pharm Res 38, 2091–2108 (2021). https://doi.org/10.1007/s11095-021-03139-0
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DOI: https://doi.org/10.1007/s11095-021-03139-0