Blood cells from an elderly patient transformed into young neurons

Blood cells from an 80-year-old patient were reprogrammed into neural stem cells with a molecular age under 20 years and generated neurons, according to a study published in Aging Cell by researchers at the University and University Hospital of Bonn, Germany, as reported by ANSA.

Study summary — blood cells transformed into young neurons

Researchers from Bonn withdrew blood samples from an 80-year-old man and, from these samples, managed to reprogram red blood cell precursors into neural stem cells whose molecular age was estimated at less than 20 years. From these stem cells, the scientists differentiated functional neurons in the lab, ANSA reports citing Oliver Brüstle, director of the Institute of Reconstructive Neurobiology at Bonn University.

The work, published in the scientific journal Aging Cell, demonstrates that it is possible to obtain a youthful molecular profile in nervous system cells from an easily accessible source — blood — even when the donor is advanced in age. According to Brüstle, the procedure not only generated cells with molecular signatures of much younger ages, but also allowed the formation of neurons from that reprogrammed material.

Method used — cellular reprogramming and a cocktail of transcription factors

The authors applied a cocktail of transcription factors that changes the reading of the cells’ genetic instructions, promoting the direct conversion of erythroid precursors into neural stem cells. Oliver Brüstle is quoted by ANSA explaining that the method alters gene expression programs and epigenetic states, leading to what the researchers describe as a molecular rejuvenation.

Unlike reprogramming that passes through a pluripotent state (such as induced pluripotent stem cells, iPSCs), the Bonn protocol directly converts hematopoietic lineage cells into neural progenitors, shortening steps and reducing risks associated with pluripotency. The study combined gene expression analyses, epigenetic markings, and neuronal functionality tests to assess both molecular age and the cells’ ability to form neurons.

Implications and relevance — molecular aging and study models

The authors emphasize that the observed rejuvenation process was gradual, making this model a useful tool to investigate mechanisms that accelerate or slow down molecular aging. A gradual rejuvenation pace allows monitoring changes over time and testing pharmacological or genetic interventions that could modulate cellular aging trajectories.

For the scientific community and Brazilian readers interested in biotechnology, neuroscience, and aging research, the Bonn-developed model may offer a practical system to:

• study molecular factors regulating youth or senescence in neural cells;
• test drugs or compounds that influence the epigenetic age of cells;
• generate human neurons from blood samples for neurodegenerative disease studies.

The approach also facilitates sampling in larger populations, since blood is more accessible than brain biopsies. This could be of interest to researchers in Brazilian universities and centers working with cellular models of neurological diseases.

Limitations and next steps

The authors themselves acknowledge limitations: the molecular rejuvenation demonstrated in cultured cells does not necessarily imply the same effect in whole tissues or organisms. Moreover, translating this to clinical applications will require extensive validations on safety, stability of the rejuvenated phenotype, and neuronal functionality in therapeutic contexts.

Next steps include exploring the mechanisms that slow the process, identifying key molecular pathways for controlling epigenetic age, and testing whether specific interventions can accelerate or stabilize rejuvenation without compromising cellular integrity.

News value and for Raízes Italianas readers

The news about reprogramming blood cells into young neurons reflects advances in biotechnology with potential impact on global biomedical research. Readers interested in science can follow developments in related areas such as neuroscience, aging, and cell therapy. For those following life and science news abroad, the topic connects to other international prompts on innovation and health — see also our pages of Notícias da Itália and Vida na Itália for more scientific and technological updates.

Source: ANSA