# Hydrogel Formulation for Biomimetic Fibroblast Cell Culture: Exploring Effects of External Stresses and Cellular Responses

## TL;DR

This paper introduces a new hydrogel for growing fibroblast cells and studies how these cells respond to different stresses, including changes in gravity.

## Contribution

The novel contribution is a biomimetic hydrogel formulation that supports fibroblast culture and reveals cellular responses to mechanical and gravitational stresses.

## Key findings

- Fibroblast cells showed aggregation and redistribution under intensified stress regions.
- The hydrogel is biocompatible and mechanically stable for tissue engineering.
- Cellular biomechanics adapt dynamically to varying stress environments.

## Abstract

In the process of tissue engineering, several types of stresses can influence the outcome of tissue regeneration. This outcome can be understood by designing hydrogels that mimic this process and studying how such hydrogel scaffolds and cells behave under a set of stresses. Here, a hydrogel formulation is proposed to create biomimetic scaffolds suitable for fibroblast cell culture. Subsequently, we examine the impact of external stresses on fibroblast cells cultured on both solid and porous hydrogels. These stresses included mechanical tension and altered-gravity conditions experienced during the 83rd parabolic flight campaign conducted by the European Space Agency. This study shows distinct cellular responses characterized by cell aggregation and redistribution in regions of intensified stress concentration. This paper presents a new biomimetic hydrogel that fulfills tissue-engineering requirements in terms of biocompatibility and mechanical stability. Moreover, it contributes to our comprehension of cellular biomechanics under diverse gravitational conditions, shedding light on the dynamic cellular adaptations versus varying stress environments.