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Sonia TA, Sharma CP. In vitro evaluation of quaternized polydimethylaminoethylmethacrylate sub-microparticles for oral insulin delivery. J Biomater Appl 2012; 28:62-73. [DOI: 10.1177/0885328212437392] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
This investigation describes the synthesis and in vitro evaluation of cationic hydrogel sub-microparticles based on polydimethylaminoethylmethacrylate for oral insulin delivery. Polymerization of dimethylaminoethylmethacrylate was carried out in aqueous medium with potassium persulfate as the initiator. Quaternization of the resulting hydrogel was carried out to introduce cationic surface groups and the derivatization was confirmed by zeta potential measurements, nuclear magnetic resonance and infrared spectroscopies. Swelling behavior of these particles was evaluated for dependence of pH. Insulin-loaded particles were subjected to in vitro release experiments at gastric and intestinal pH. Moreover, cytotoxicity evaluation showed that both polydimethylaminoethylmethacrylate and its quaternized derivative were non-toxic to Caco-2 and L929 cell lines. The presence of quaternary ammonium groups improved the cationic charge and enhanced the mucoadhesive properties of the hydrogel. Confocal microscopic observations showed that these sub-microparticles were capable of opening tight junctions between the Caco-2 cells and thus increased the paracellular permeability. The above studies suggest that cationic hydrogel sub-microparticles can act as a good candidate for oral insulin delivery.
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Affiliation(s)
- TA Sonia
- Division of Biosurface Technology, Sree Chitra Tirunal Institute for Medical Sciences and Technology, India
| | - Chandra P Sharma
- Division of Biosurface Technology, Sree Chitra Tirunal Institute for Medical Sciences and Technology, India
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Cornejo-Bravo JM, Partida-Soria Y, Serrano-Medina A, Espinoza-Dueñas K, Ramos MA, Licea-Claverie A. Hydrophobic weak acid polymers as controlled release carriers. Pharm Dev Technol 2010; 17:170-6. [DOI: 10.3109/10837450.2010.529147] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Vadlapatla R, Fifer EK, Kim CJ, Alexander KS. Drug–Organic Electrolyte Complexes as Controlled Release Systems. Drug Dev Ind Pharm 2009; 35:1-11. [DOI: 10.1080/03639040701842469] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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