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The closure and repair of wounds after traumatic or surgical injury is of significant clinical and research importance. While sutures remain the common wound closure technique, they have many disadvantages. Consequently, polymeric hydrogel adhesives have emerged as essential materials for wound management and repair because of their tunable chemical and physical properties, which enable them to adhere or stick to tissues, possess sufficient mechanical strength to stay intact and be subsequently removed, provide complete wound occlusion, and act as a barrier to bacterial infection. Moreover, these materials absorb wound exudates and keep the wound moist for faster healing. This tutorial review summarizes the key chemical features that enabled the development and use of polymeric hydrogels as wound adhesives, sealants, and hemostats, their design requirements, synthetic routes, determination of properties, and the tests needed to evaluate their performances. This tutorial review is a reference and a starting point for scientists and clinicians working or interested in the field of wound management and, importantly, for the general audience who is interested in polymers for medical applications.

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Since their development in the mid-80s, dendrimers have become prominent synthetic macromolecules in the field of biomedical science. This tutorial review begins by discussing pertinent background information about dendrimers, focusing on their behavior in solution, how they are synthesized and what advantages they have over linear polymers. Then the focus of the review shifts to the biomedical applications of dendrimers, including their use in drug delivery, tissue engineering, gene transfection, and contrast enhancement for magnetic resonance imaging. This tutorial review is written for first-year graduate students or senior undergraduates and "asks" and "answers" many of the questions that arise in our first discussions of dendrimers.

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Nanoparticles are finding increased uses in drug delivery applications as a means to increase treatment efficacy and improve patient care. Here, we report engineered polymeric nanoparticles that undergo a hydrophobic to hydrophilic transition at pH 5 to afford swelling and rapid release of their contents. As our clinical interest lies in the prevention of lung tumor recurrence following resection, the nanoparticles were evaluated in a model mimicking microscopic disease, akin to residual occult tumor that can remain at the resection margin following surgery. Expansile nanoparticles loaded with paclitaxel, a poorly water-soluble anticancer drug, prevent establishment of lung cancer in vivo and are superior to the conventional drug delivery method for paclitaxel using Cremophor EL/ethanol.