Researchers at the New York State Institute for Basic Research in Developmental Disabilities report a study that finds altered development of neural progenitor cells (immature or undifferentiated cells) after the cells were stimulated with blood sera from autistic children. Although no adequate cellular or animal models were available for study of these neuronal progenitor cells, it was found that neuronal development could be modeled in a culture. Neuronal progenitor cells were stimulated with sera to differentiate into neurons.