In this mini-review a number of novel outcomes, originating from studies in the field of PAMAM dendrimers, are presented and discussed. Owing to the multi-disciplinary nature of dendrimer chemistry it seems important to focus on the relevant topical research of PAMAM dendrimers, including their function, toxicity, surface modifications, and also possible new applications of these spherical polymers. We also consider the possibilities of specific functionalisation of PAMAM dendrimers — both novel ideas and those that have already been reported; as well as their cell-mediated effects (toxic and non-toxic). Then the reactivity of dendrimers’ terminal groups, and their anticipated protective role against modifications of biomacromolecules, are discussed with regard to future developments in biomedical research.

Diabetes mellitus, which is characterised by high blood glucose levels and the burden of various macrovascular and microvascular complications, is a cause of much human suffering across the globe. While the use of exogenous insulin and other medications can control and sometimes prevent various diabetes-associated sequelae, numerous diabetic complications are still commonly encountered in diabetic patients. Therefore, there is a strong need for safe and effective antihyperglycaemic agents that provide an alternative or compounding option for the treatment of diabetes. In recent years, amino-terminated poly(amido)amine (PAMAM) dendrimers (G2, G3 and G4) have attracted attention due to their protective value as anti-glycation and anti-carbonylation agents that can be used to limit the nonenzymatic modifications of biomacromolecules. The focus of this review is to present a detailed survey of our own data, as well as of the available literature regarding the toxicity, pharmacological properties and overall usefulness of PAMAM dendrimers. This presentation pays particular and primary attention to their therapeutic use in poorly controlled diabetes and its complications, but also in other conditions, such as Alzheimer’s disease, in which such nonenzymatic modifications may underlie the pathophysiological mechanisms. The impact of dendrimer administration on the overall survival of diabetic animals and on glycosylation, glycoxidation, the brain-blood barrier and cellular bioenergetics are demonstrated. Finally, we critically discuss the potential advantages and disadvantages accompanying the use of PAMAM dendrimers in the treatment of metabolic impairments that occur under conditions of chronic hyperglycaemia.