The work, published in Cell Biomaterials, came from the laboratory of biomedical engineer Ankur Singh, director of Georgia Tech's Center for Immunoengineering, and was led by doctoral student Zhonghao Dai. The team delivered instructions into more than 90 percent of aging T cells without damaging them. Treated cells became more active, multiplied, and regained the ability to attack infected and cancerous cells, using cells taken from older donors including people with current or prior cancer.
What is being delivered matters for interpreting the result. These are microRNAs, short regulatory molecules that tune which genes a cell expresses, delivered without viral vectors. The paper describes the effect as transient modulation of the cell's internal regulatory networks, not permanent genetic modification or gene editing. Singh has described the signals as instructions that help reset the cells' internal programs, and said the goal was not to reverse aging but to restore enough lost function for the cells to behave more like younger ones.
