Designing and In Vitro Characterization of pH-Sensitive Aspartic Acid-Graft-Poly(Acrylic Acid) Hydrogels as Controlled Drug Carriers
Abstract
:1. Introduction
2. Results and Discussion
2.1. Synthesis of Polymeric Hydrogels
2.2. Sol-Gel Analysis
2.3. Fourier Transform Infrared (FTIR) Analysis
2.4. Dynamic Swelling Studies
2.4.1. Effect of pH on Swelling
2.4.2. Effect of APA/ACA/and EGDMA on Swelling
2.5. Polymer Volume Fraction
2.6. Thermogravimetric Analysis (TGA)
2.7. Differential Scanning Calorimetry (DSC) Analysis
2.8. Percent Porosity
2.9. Morphology of Hydrogels
2.10. Drug Loading
2.11. Powder X-ray Diffraction (PXRD) Study
2.12. In Vitro Drug Release Study and Kinetics
2.12.1. Effect of pH on Drug Release
2.12.2. Effect of APA/ACA/EGDMA and the Commercial Product (Acetaminophen) on Drug Release
2.12.3. Comparative Study of ACMP-Loaded APA-g-PACA Hydrogels with Other Delivery Systems for ACMP
3. Conclusions
4. Materials and Methods
4.1. Materials
4.2. Synthesis of Polymeric Hydrogels
4.3. Sol-Gel Analysis
4.4. Fourier Transform Infrared (FTIR) Analysis
4.5. Dynamic Swelling Studies
4.6. Polymer Volume Fraction
4.7. Thermogravimetric Analysis (TGA)
4.8. Differential Scanning Calorimetry (DSC) Analysis
4.9. Percent Porosity
4.10. Morphology of Hydrogels
4.11. Drug Loading
4.12. Powder X-ray Diffraction (PXRD) Analysis
4.13. In Vitro Dissolution and Kinetics
Author Contributions
Funding
Conflicts of Interest
References
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F. Code | Dynamic Swelling up to 72 h | Drug Loading (mg)/400 mg of Dry Gels | Polymer Volume Fraction | |||
---|---|---|---|---|---|---|
pH 1.2 | pH 7.4 | Weight method | Extraction method | pH 1.2 | pH 7.4 | |
APAF-1 | 3.63 ± 0.21 | 09.89 ± 0.18 | 93.3 ± 1.5 | 91.8 ± 0.9 | 0.275 | 0.101 |
APAF-2 | 3.92 ± 0.19 | 10.12 ± 0.12 | 98.2 ± 1.2 | 95.7 ± 1.6 | 0.255 | 0.098 |
APAF-3 | 4.53 ± 0.18 | 10.29 ± 0.24 | 105.4 ± 1.2 | 103.1 ± 1.8 | 0.220 | 0.097 |
APAF-4 | 3.77 ± 0.24 | 9.56 ± 0.27 | 81.2 ± 1.1 | 78.3 ± 1.1 | 0.265 | 0.104 |
APAF-5 | 4.53 ± 0.18 | 10.29 ± 0.24 | 105.4 ± 1.2 | 103.1 ± 1.8 | 0.220 | 0.097 |
APAF-6 | 4.70 ± 0.20 | 10.80 ± 0.26 | 112.8 ± 0.8 | 110.2 ± 1.1 | 0.212 | 0.092 |
APAF-7 | 4.53 ± 0.18 | 10.29 ± 0.24 | 105.4 ± 1.2 | 103.1 ± 1.8 | 0.220 | 0.097 |
APAF-8 | 3.67 ± 0.26 | 6.76 ± 0.21 | 96.3 ± 1.0 | 94.5 ± 1.3 | 0.272 | 0.147 |
APAF-9 | 3.41 ± 0.14 | 6.10 ± 0.13 | 86.5 ± 0.1 | 84.9 ± 0.9 | 0.293 | 0.163 |
F. Code | Zero-Order | First-Order | Higuchi | Korsmeyer–Peppas | |
---|---|---|---|---|---|
r2 | r2 | r2 | r2 | n | |
APAF-1 | 0.8587 | 0.9071 | 0.7013 | 0.8880 | 0.9417 |
APAF-2 | 0.9493 | 0.9631 | 0.9545 | 0.9697 | 0.8448 |
APAF-3 | 0.9635 | 0.9856 | 0.9760 | 0.9716 | 0.8260 |
APAF-4 | 0.9469 | 0.9491 | 0.9063 | 0.9094 | 0.6506 |
APAF-5 | 0.9635 | 0.9856 | 0.9760 | 0.9716 | 0.8260 |
APAF-6 | 0.9372 | 0.9757 | 0.9823 | 0.9726 | 0.7507 |
APAF-7 | 0.9635 | 0.9856 | 0.9760 | 0.9716 | 0.8260 |
APAF-8 | 0.9761 | 0.9893 | 0.9812 | 0.9858 | 0.7076 |
APAF-9 | 0.9912 | 0.9954 | 0.9422 | 0.9700 | 0.6864 |
S. No. | Formulation | Intended Quantity of Loaded Formulation for Drug Release (mg) | Maximum % of Drug Release | Time for Maximum % of Drug Release | Reference |
---|---|---|---|---|---|
1 | Eudragit S100-based nanoparticles | 50 | 28.31 | 12 h | [22] |
2 | Tramadol HCl and acetaminophen microparticles | 531 | 99.5 | 12 h | [21] |
3 | Acetaminophen-loaded poly(L-lactide) microcapsules | 80 | 83.50 | 24 h | [61] |
4 | Hydroxypropylmethylcellulose matrix tablets containing acetaminophen | - | 100 | 8 h | [62] |
5 | Acetaminophen- and tramadol hydrochloride-loaded soft gelatin capsule | 325 | 100 | 0.5 h | [63] |
6 | APA-g-PACA hydrogels | 400 | 84.62 | 24 h | Current study |
Formulation Code | Polymer (APA) g/100 g | Monomer (ACA) g/100 g | Initiator (APS) g/100 g | Crosslinker (EGDMA) g/100 g |
---|---|---|---|---|
APAF-1 | 0.30 | 25 | 0.5 | 0.50 |
APAF-2 | 0.65 | 25 | 0.5 | 0.50 |
APAF-3 | 1.00 | 25 | 0.5 | 0.50 |
APAF-4 | 1.00 | 20 | 0.5 | 0.50 |
APAF-5 | 1.00 | 25 | 0.5 | 0.50 |
APAF-6 | 1.00 | 30 | 0.5 | 0.50 |
APAF-7 | 1.00 | 25 | 0.5 | 0.50 |
APAF-8 | 1.00 | 25 | 0.5 | 0.75 |
APAF-9 | 1.00 | 25 | 0.5 | 1.00 |
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Suhail, M.; Fang, C.-W.; Chiu, I.-H.; Hung, M.-C.; Vu, Q.L.; Lin, I.-L.; Wu, P.-C. Designing and In Vitro Characterization of pH-Sensitive Aspartic Acid-Graft-Poly(Acrylic Acid) Hydrogels as Controlled Drug Carriers. Gels 2022, 8, 521. https://doi.org/10.3390/gels8080521
Suhail M, Fang C-W, Chiu I-H, Hung M-C, Vu QL, Lin I-L, Wu P-C. Designing and In Vitro Characterization of pH-Sensitive Aspartic Acid-Graft-Poly(Acrylic Acid) Hydrogels as Controlled Drug Carriers. Gels. 2022; 8(8):521. https://doi.org/10.3390/gels8080521
Chicago/Turabian StyleSuhail, Muhammad, Chih-Wun Fang, I-Hui Chiu, Ming-Chia Hung, Quoc Lam Vu, I-Ling Lin, and Pao-Chu Wu. 2022. "Designing and In Vitro Characterization of pH-Sensitive Aspartic Acid-Graft-Poly(Acrylic Acid) Hydrogels as Controlled Drug Carriers" Gels 8, no. 8: 521. https://doi.org/10.3390/gels8080521