The present disclosure provides new and innovative compositions of Neuronal regeneration-promoting cells (NRPCs), methods for generating NRPCs, and methods of treating subjects having damaged nerve cells using NRPCs. In an embodiment, the NRPCs are induced from tonsil-derived mesenchymal stem cells and express CD26, CD106, CD112, CD121a, and CD141, wherein CD121a has an expression level of about 30% or higher, the expression level measured immediately after thawing the NRPCs from a frozen state. Furthermore, the NRPCs are configured to promote formation of axons on neuronal cells.

Three-dimensional tumor avatars comprising an artificial scaffold, tumor cells, tumor associated endothelial cells and tumor associated fibroblast cells are provided. Kits comprising the 3D tumor avatars, methods of producing the 3D tumor avatars and methods of using the 3D tumor avatars are also provided.