RESUMEN
@#Mesenchymal stem cells(MSCs)are pluripotent stem cells which are derived from avariety of tissues and have the potential for multidirectional cell differentiation and self-cell renewal. They can play a therapeutic effect on a variety of eye diseases. Studies have shown that the biological functions of MSCs are closely related to their secreted exosomes(MSC-Exo). Compared with MSCs, the biological performance of MSC-EXO is more stable and non-tumorigenic. Therefore, MSC-EXO is expected to be an effective substitute for the biological function of MSCs. In this paper, the application progress of MSC-EXO in ocular diseases is discussed in order to provide ideas and reference for the treatment of MSC-EXO in ocular diseases.
RESUMEN
Cancer stem cells (CSCs) are a subpopulation of cancer cells with functions similar to those of normal stem cells. Although few in number, they are capable of self-renewal, unlimited proliferation, and multi-directional differentiation potential. In addition, CSCs have the ability to escape immune surveillance. Thus, they play an important role in the occurrence and development of tumors, and they are closely related to tumor invasion, metastasis, drug resistance, and recurrence after treatment. Therefore, specific targeting of CSCs may improve the efficiency of cancer therapy. A series of corresponding promising therapeutic strategies based on CSC targeting, such as the targeting of CSC niche, CSC signaling pathways, and CSC mitochondria, are currently under development. Given the rapid progression in this field and nanotechnology, drug delivery systems (DDSs) for CSC targeting are increasingly being developed. In this review, we summarize the advances in CSC-targeted DDSs. Furthermore, we highlight the latest developmental trends through the main line of CSC occurrence and development process; some considerations about the rationale, advantages, and limitations of different DDSs for CSC-targeted therapies were discussed.