Peptide- and Metabolite-Based Hydrogels: Minimalistic Approach for the Identification and Characterization of Gelating Building Blocks

Smart self-assembled peptide-based hydrogels: Mechanism, design and biomedical applications

Peptide hydrogels have gained widespread attention in biomedical engineering due to their unique ability to mimic the cellular microenvironment in vivo. Stimulus-responsive self-assembled (SAP) hydrogels can undergo conformational changes in response to changes in the external environment, prompting a sol-gel transition. Their inherent biodegradability, excellent surface activity and biocompatibility make them ideal candidates for a wide range of biomedical applications, and these SAP hydrogels can be widely used in the fields of tissue engineering, cell and drug delivery, wound healing and medical diagnostic imaging. In this paper, the basic properties, design principles, preparation methods and self-assembly mechanisms of different types of stimuli-responsive SAP hydrogels are reviewed. By designing and constructing stimulus-responsive SAP hydrogels, we can create materials that mimic natural physiological environments, thereby better simulating cell behavior and tissue repair. In addition, it highlights specific applications of these hydrogels in biomedical engineering, supported by examples from recent literature. The report summarizes the current state of research, highlights key challenges, and provides insights into future prospects to encourage continued innovation and exploration in this rapidly evolving field.

Self-assembled peptide hydrogels for the treatment of diabetes and associated complications

Diabetes is a widespread epidemic that includes a number of comorbid conditions that greatly increase the chance of acquiring other chronic illnesses. Every year, there are significantly more people with diabetes because of the rise in type-2 diabetes prevalence. The primary causes of illness and mortality worldwide are, among these, hyperglycemia and its comorbidities. There has been a lot of interest in the creation of peptide-based hydrogels as a potentially effective platform for the treatment of diabetes and its consequences. Here, we emphasize the use of self-assembled hydrogel formulations and their unique potential for the treatment/management of type-2 diabetes and its consequences. (i.e., wounds). Key aspects covered include the characteristics of self-assembled peptide hydrogels, methods for their preparation, and their pre-clinical and clinical applications in addressing metabolic disorders such as type-2 diabetes.

Characterization of amyloid-like metal-amino acid assemblies with remarkable catalytic activity

While enzymes are potentially useful in various applications, their limited operational stability and production costs have led to an extensive search for stable catalytic agents that will retain the efficiency, specificity, and environmental-friendliness of natural enzymes. Despite extensive efforts, there is still an unmet need for improved enzyme mimics and novel concepts to discover and optimize such agents. Inspired by the catalytic activity of amyloids and the formation of amyloid-like assemblies by metabolites, our group pioneered the development of novel metabolite-metal co-assemblies (bio-nanozymes) that produce nanomaterials mimicking the catalytic function of common metalloenzymes that are being used for various technological applications. In addition to their notable activity, bio-nanozymes are remarkably safe as they are purely composed of amino acids and minerals that are harmless to the environment. The bio-nanozymes exhibit high efficiency and exceptional robustness, even under extreme conditions of temperature, pH, and salinity that are impractical for enzymes. Our group has recently also demonstrated the formation of ordered amino acid co-assemblies showing selective and preferential interactions comparable to the organization of residues in folded proteins. The identified bio-nanozymes can be used in various applications including environmental remediation, synthesis of new materials, and green energy.