More effective antitumor strategies
2007/10/01 Kortabitarte Egiguren, Irati - Elhuyar Zientzia Iturria: Elhuyar aldizkaria
A team of researchers from the Faculty of Medicine and Dentistry works to find pharmacological agents that improve the therapeutic benefit of some of the therapies used for the treatment of oncological diseases: chemotherapy, immunotherapy and radiation therapy.
The aim of this team of researchers is to identify compounds that affect metabolic pathways and processes that occur differently in healthy and diseased tissues. That is, they want to make a selective selection to increase the sensitivity of treatment in diseased tissues and, at the same time, avoid damage to healthy cells and tissues.
In this sense, researchers study different biological modulators in some models of tumors such as melanoma, sarcoma, and colon cancer. On the one hand, the use of agents to modulate glutation level (GSH) has been studied. In fact, glutathione is a basic element in the biological processes that occur in cells, both in healthy cells and in tumor cells. Tumor cells with a high level of IMS have a higher capacity for growth and metastasis development, while at the same time having a lower sensitivity to antitumor agents compared to healthy cells. On the other hand, agents that promote cell separation such as retinoids have been used. This is because tumor cells lose their usual degree of separation, so instead of playing a certain role they tend to reproduce and grow.
More selective therapies
The two groups of agents mentioned above have been combined with the usual agents in antitumor therapies and have verified the benefits obtained. On the one hand, it has been proven that one of the agents that modulates the level of GSH, oxothiazolidine carboxylate (OTZ), makes antitumor agents more effective and at the same time does not harm healthy tissue. Another agent that modulates the level of GSH is butionin sulfoxamide (SMI). It has been proven that when the latter is combined with conventional antitumor agents, it also affects healthy tissue, although it increases the effectiveness of standard drugs.
On the other hand, the UPV/EHU research team uses retinoids for tumor cell separation and recovery from a situation similar to that of healthy cells combined with traditional standard agents. Tumor cells' response to retinoids depends on their degree of separation. In general, tumor cells with a very low degree of separation have a higher sensitivity to retinoids. For their part, tumor cells with low degree of separation, attending to retinoids, can activate defense mechanisms that increase the level of glutathione, which tend to increase metastasis.
It is a very interesting fact. In fact, so far they have not described that in the same type of tumor cell lines could have such a different behavior. In this sense, UPV researchers have somehow joined the two modulating lines, the modulating GSH and the modulators that drive cell differentiation. That is, the relationship between the two has been studied and it has been proven that retinoids, in addition to promoting cell separation, modulate the level of GSH of tumor cells.
UPV researchers continue to investigate the administrative guidelines and appropriate concentrations of the agents used. In biological modulation, these two elements are very important to ensure treatment success. All this biological modulation does not depend on quantity, that is, the more, the better. The optimal response is obtained at a certain concentration and it is necessary to find that optimal dose. Lack and abuse can be counterproductive.
UPV-EHU researchers investigate both in vitro and in vivo in UPV/EHU laboratories. One of the main objectives of this group of researchers is that in the future all the information obtained from these research can be applied to clinical sessions.
Gai honi buruzko eduki gehiago
Elhuyarrek garatutako teknologia
