HMN 2025: Researchers find a new way to customize live materials for tissue engineering, drug delivery and 3D printing

The study, published in a special edition of ACS synthetic biologyIt focuses on changing protein matrices, which are the proteins that provide a structure for ELMS. By introducing small genetic changes, the team found that they could make a big difference in how these materials carried. These fruits could open doors for progress in tissue engineering, drug delivery and even 3D printing living devices.

“We are engineering cells to create customized materials with unique properties,” said Caroline Ajo-Franklin, professor of sciences and corresponding author of the study. “While synthetic biology gave us tools to verify these properties, the connection between genetic sequence, material structure and behavior that has not been able to do most to date.”

Using synthetic biological techniques, the team worked with a bacteria called Crescentus Caulobacter. Previous members of the laboratory were engineered to produce protein called Bud (short for “bottom up of novo”), which helps to adhere to each other and create a supportive matrix. This enabled the bacteria to grow in medium-sized structures, which call the group on Bud-Elms.

Assuming this engineering approach, the researchers changed the length of specific protein segments called polypeptides such as elastin (ELPs) and created new materials. The team was characterized by the central mid-elm point and two new versions and found that there were different properties on display. First matter, called bud₄₀Were the shortest ElPs and thicker fibers made of a more severe material. Second type, bud₆₀who had central ElPs and created a mixture of globules and fibers, producing the strongest material under deformed oscillation stress. Finally, bud₈₀They had the longest ElPs, generated thinner fibers, and as a result there was less stiff material that easily breaks under deformation stress.

High imagery and mechanical tests showed that these differences were only cosmetic – they also affected how the materials dealt with stress and flowing under pressure. BACA₆₀For example, it may withstand more force and better adapt to changes in its surroundings, making it suitable for applications such as 3D printing or drug delivery.

All three subjects had two things in common: they showed a shear thinning behavior and had a lot of water on 93% of their weight-something that makes them well suited for biomedical uses as scaffolding to support growth cell in tissue engineering or systems to deliver medication in a controlled manner.

“This study is one of the first people who focus on building living materials from the bottom up with custom mechanical properties rather than just adding biological functions,” said Esther Jimenez, a graduate student in the sciences and the first author of the study . “By making small deaths with protein sequences, we have received valuable insights on how to design materials with specific mechanical properties.”

Potential uses extend over the biomedical area; These self-cooling materials could be adapted for environmental cleaning or renewable energy applications such as the construction of bio-return structures or using natural energy generation processes.

“This work emphasizes the importance of understanding relationships-structure-structure-structure,” said Carlson Nguyen Senior, major sciences and the second author of the study. “By identifying specific genetic modifications to identify relevant properties, we are building a basis for designing other living materials.”

This research received support from the National Science Foundation Foundation Foundation Foundation, the Cancer Prevention Institute and Texas Research and The Welch Foundation.