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1.
Bogotá; s.n; 2011. 67 p. tab, ilus.
Thesis in Spanish | LILACS, MOSAICO - Integrative health | ID: biblio-877054

ABSTRACT

Este es un trabajo de investigación, en el que se realiza una correlación teórica en el marco de la lógica peirceana que tiene como fin el re-plantear el concepto de enfermar, afín con las concepciones básicas de la terapia neural. Para la comprobación de la abducción del trabajo se realizó una correlación lógica de los predicados de la definición de evolución y de emergencia con los predicados del proceso de enfermar, a partir del análisis de 20 historias clínicas tomadas al azar de la consulta de terapia neural, que llenaron el criterio de tener por lo menos (2) controles. Los resultados mostraron un cumplimiento de los predicados en el 100% de los casos excepto para el predicado de impredictibilidad de la definición de emergencia que fue del 92.9%. Se logró comprobar con un alto grado de veracidad y con el carácter de inducción cualitativa, que el enfermar es un proceso evolutivo que implica novedad, irreversibilidad y capacidad de adquirir hábitos y emergente que implica novedad, impredicitibilidad y que el organismo funcione como un todo. El comprender que el proceso de enfermar tiene un carácter evolutivo y emergente puede tener grandes consecuencias y aplicaciones, en especial, para la resolución de muchos problemas teóricos y prácticos del sistema médico de tradición occidental.


Subject(s)
Humans , Medical Records , Disease/psychology , Logic , Habits
2.
Int J Radiat Oncol Biol Phys ; 75(2): 534-42, 2009 Oct 01.
Article in English | MEDLINE | ID: mdl-19735878

ABSTRACT

PURPOSE: Radiation therapy is an integral part of the preoperative treatment of rectal cancers. However, only a minority of patients achieve a complete pathologic response to therapy because of resistance of these tumors to radiation therapy. This resistance may be mediated by constitutively active pro-survival signaling pathways or by inducible/acquired mechanisms in response to radiation therapy. Simultaneous inhibition of these pathways can sensitize these tumors to radiation therapy. METHODS AND MATERIALS: Human colorectal cancer cells were exposed to clinically relevant doses of gamma rays, and the mechanism of their radioresistance was investigated. We characterized the transcription factor nuclear factor-kappaB (NF-kappaB) activation as a mechanism of inducible radioresistance in colorectal cancer and used curcumin, the active ingredient in the yellow spice turmeric, to overcome this resistance. RESULTS: Curcumin inhibited the proliferation and the post-irradiation clonogenic survival of multiple colorectal cancer cell lines. Radiation stimulated NF-kappaB activity in a dose- and time-dependent manner, whereas curcumin suppressed this radiation-induced NF-kappaB activation via inhibition of radiation-induced phosphorylation and degradation of inhibitor of kappaB alpha, inhibition of inhibitor of kappaB kinase activity, and inhibition of Akt phosphorylation. Curcumin also suppressed NF-kappaB-regulated gene products (Bcl-2, Bcl-x(L), inhibitor of apoptosis protein-2, cyclooxygenase-2, and cyclin D1). CONCLUSIONS: Our results suggest that transient inducible NF-kappaB activation provides a prosurvival response to radiation that may account for development of radioresistance. Curcumin blocks this signaling pathway and potentiates the antitumor effects of radiation therapy.


Subject(s)
Colorectal Neoplasms/radiotherapy , Curcumin/pharmacology , NF-kappa B/antagonists & inhibitors , Neoplasm Proteins/antagonists & inhibitors , Radiation Tolerance/physiology , Radiation-Sensitizing Agents/pharmacology , Apoptosis , Cell Line, Tumor , Cell Proliferation/drug effects , Colonic Neoplasms/metabolism , Colonic Neoplasms/radiotherapy , Colorectal Neoplasms/metabolism , Dose-Response Relationship, Drug , Enzyme Inhibitors/pharmacology , Gene Expression Regulation/drug effects , HT29 Cells , Humans , NF-kappa B/metabolism , NF-kappa B/radiation effects , Neoplasm Proteins/metabolism , Neoplasm Proteins/radiation effects , Phosphorylation , Proto-Oncogene Proteins c-akt/antagonists & inhibitors , Proto-Oncogene Proteins c-akt/metabolism , Rectal Neoplasms/metabolism , Rectal Neoplasms/radiotherapy
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