Abstract: Provided is a method of producing neural precursor cells, in which an inhibitor of E-cadherin activity is provided to a population of the cells having neural potential, cell stress is induced among the population of cells; and the surviving cells are cultured until neural precursor cells are produced. Also provided is a method of adapting a cell in vitro for therapeutic use, in which an inhibitor of E-cadherin activity is provided to a population of cells having neural potential, cell stress is induced among the population of cells, and the surviving cells are cultured until neural precursor cells are produced. This method may optionally additionally involve culturing the neural precursor cells until neural cells are produced and formulating the neural precursor cells or neural cells in a composition suitable for administration to a patient. The invention also provides cells produced by these methods. The methods may be practiced on stem cells, particularly iPSCs.