In 1946, she accepted an invitation to continue her research at Washington University in Saint Louis, Missouri. Working
there, Dr. Rita Levi-Montalcini was instrumental in discovering NGF
(nerve growth factor), a substance found in malignant tumors that
causes nerve fibers to grow rapidly.
In 1986, Dr. Rita Levi-Montalcini received due recognition when she, along with her colleague, Dr. Stanley Cohen, won the Nobel Prize in medicine for the discoveries of NGF and of EGF (epidermal growth factor), which is used in the treatment of severe burns.