Novel Fabrication Process to Create Aligned Nanofiber Hydrogels Developed

Researchers from Rice University and the University of Houston have developed a novel fabrication process to create aligned nanofiber hydrogels, which could offer new possibilities for tissue regeneration after injury and provide a way to test therapeutic drug candidates without the use of animals.

The team, led by Jeffrey Hartgerink, has designed peptide-based hydrogels that mimic the aligned structure of muscle and nerve tissues. Alignment is crucial for tissue functionality, but challenging to reproduce in the lab. By extruding peptide solutions into salty solutions and adjusting ion concentrations, the researchers were able to create highly aligned peptide nanofibers, resembling twisted strands of rope smaller than a cell.

A key finding was that cells need to be able to "pull" on the nanofibers to recognize the alignment and arrange themselves accordingly. When the nanofibers were too rigid, the cells failed to align properly. This insight into cell-material interactions could have broader implications for tissue engineering and biomaterial design.

“Our findings demonstrate that our method can produce aligned peptide nanofibers that effectively guide cell growth in a desired direction, a crucial step toward creating functional biological tissues for regenerative medicine applications," explained Adam Farsheed, lead author of the study, published in ACS Nano.