Consequently, after implantation into the gap of a severe spinal cord injury model, the incorporated rat BMSCs undergo favorable neural differentiation, leading to nerve regeneration and recovery of locomotor functions. In another example, brown adipose stem cells were introduced into an ALG matrix along with platinum-coated Au NPs. The presence of these NPs enhanced electrical conductivity, making the hydrogel suitable for use in infarcted myocardial regions, but also conferred antioxidant activities. This dual functionality reduced inflammation and supported the survival and activity (e.g., VEGF secretion and promotion of vascularization) of the implanted cells promoting the connection between healthy and damaged tissue and making this hybrid hydrogel a promising strategy for cardiac repair.