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1.
Eur Rev Med Pharmacol Sci ; 25(24): 7654-7667, 2021 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-34982427

RESUMEN

Cervical cancer is characterized by the cellular transformation caused by Human Papillomavirus (HPV), favoring cell proliferation, migration, invasion, and metastasis. Cervical cancer is conventionally treated with radiation therapy, and chemotherapy focused on the destruction of tumor cells. However, chemoresistance and low selectivity between tumor and non-tumor cells have been reported, causing side effects in patients. Metabolites of natural origin have shown selectivity against tumor cells, suggesting their use for reducing the side effects caused by drugs used in conventional therapy. Among these compounds, several natural coumarins stand out, such as auraptene, scopoletin, osthole, and praeruptorin, of which antiproliferative, anti-migratory, and anti-invasive activity have been reported. Auraptene, scopoletin, osthole, and praeruptorin show a cytotoxic or antiproliferative effect on cervical tumor cells, arresting the cell cycle by inducing the overexpression of negative regulators of the cell cycle, or inducing cell death by increasing the expression of pro-apoptotic proteins and decreasing that of anti-apoptotic proteins. On the other hand, auraptene, scopoletin, and praeruptorin inhibit the capacity for migration, invasion, and metastasis of cervical tumor cells, mainly by inhibiting the expression and activity of matrix metalloproteinase-2 and -9. The PI3K/Akt signal pathway appears to be central to the anti-tumor activity of the coumarins analyzed in this review. In addition, auraptene, osthole, and praeruptorin are useful in sensitizing tumor cells to radiotherapy or chemotherapeutic molecules, such as FOLFOX, cisplatin, or DOX. Coumarins offer an excellent possibility for developing new drugs as complementary medicine with an integrative approach against cervical cancer.


Asunto(s)
Antineoplásicos/uso terapéutico , Cumarinas/uso terapéutico , Neoplasias del Cuello Uterino/tratamiento farmacológico , Animales , Antineoplásicos/farmacología , Terapias Complementarias , Cumarinas/farmacología , Femenino , Humanos
17.
Rev ADM ; 47(3): 137-41, 1990.
Artículo en Español | MEDLINE | ID: mdl-2145848

RESUMEN

In this paper the nylon-resin technique is proposed as the idoneous fixing technique of dentary displacement treatment and/or radicle fracture due to dentoalveolar traumatisms, of high incidence in children. In order to probe the effectiveness and advantages of this technique a comparative study against the wire-resin technique was done. The fixing time proposed for both procedures was 14 days. The techniques were applied in the same number of patients indistinctly in age, sex, affected teeth, and type of lesion. After evaluation we observed that the proposed technique is superior in several aspects: fulfils with the requirements of an ideal ferule, is aesthetic, easier to elaborate, more resistant, more compatible with tissues, and because of their semirigidity, more functional.


Asunto(s)
Resinas Compuestas , Recubrimiento Dental Adhesivo , Incisivo/lesiones , Nylons , Ácidos Polimetacrílicos , Férulas (Fijadores) , Avulsión de Diente/terapia , Raíz del Diente/lesiones , Adolescente , Bisfenol A Glicidil Metacrilato , Niño , Preescolar , Femenino , Humanos , Masculino
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