RT Journal Article
T1 Enhancing the Bystander and Abscopal Effects to Improve Radiotherapy Outcomes.
A1 Farias, Virgínea de Araújo
A1 Tovar, Isabel
A1 Del Moral, Rosario
A1 O'Valle, Francisco
A1 Expósito, José
A1 Oliver, Francisco Javier
A1 Ruiz de Almodóvar, José Mariano
K1 abscopal effect
K1 bystander effect
K1 cell loss
K1 exosomes
K1 experimental radiotherapy
K1 mesenchymal cell enhancement ratio
K1 mesenchymal cells
AB In this paper, we summarize published articles and experiences related to the attempt to improve radiotherapy outcomes and, thus, to personalize the radiation treatment according to the individual characteristics of each patient. The evolution of ideas and the study of successively published data have led us to envisage new biophysical models for the interpretation of tumor and healthy normal tissue response to radiation. In the development of the model, we have shown that when mesenchymal stem cells (MSCs) and radiotherapy are administered simultaneously in experimental radiotherapy on xenotumors implanted in a murine model, the results of the treatment show the existence of a synergic mechanism that is able to enhance the local and systemic actions of the radiation both on the treated tumor and on its possible metastasis. We are convinced that, due to the physical hallmarks that characterize the neoplastic tissues, the physical-chemical tropism of MSCs, and the widespread functions of macromolecules, proteins, and exosomes released from activated MSCs, the combination of radiotherapy plus MSCs used intratumorally has the effect of counteracting the pro-tumorigenic and pro-metastatic signals that contribute to the growth, spread, and resistance of the tumor cells. Therefore, we have concluded that MSCs are appropriate for therapeutic use in a clinical trial for rectal cancer combined with radiotherapy, which we are going to start in the near future.
SN 2234-943X
YR 2020
FD 2020-01-08
LK http://hdl.handle.net/10668/14992
UL http://hdl.handle.net/10668/14992
LA en
DS RISalud
RD Apr 17, 2025