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. Author manuscript; available in PMC: 2011 Feb 25.
Published in final edited form as: J Pharm Pharmacol. 2008 Jan;60(1):1–13. doi: 10.1211/jpp.60.1.0001

Figure 5.

Figure 5

Schematic of mechanics of pH-responsive cationic hydrogels with glucose oxidase, based on the work of Podual [93]. Glucose appearance results in the production of gluconic acid, which decreases the system pH. pH-induced swelling results in increased diffusion of insulin from within the gel. As glucose is utilized, the mechanism is reversed.

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