Distribución tisular de transportadores de fármacos en tejidos normales y transformados. Papel en el sistema nervioso central

作者: Elena Guillén Gómez

DOI:

关键词:

摘要: La informacion disponible acerca de los transportadores nucleosidos concentrativos en cerebro es muy limitada, mientras que existen varios estudios equilibrativos. primera parte esta tesis se centra la localizacion del transportador concentrativo preferente por adenosina CNT2 y su posible regulacion transcripcional, ya afinidad este neuromodulador mayor el resto transportadores. Se ha visto transcrito localiza un gran numero regiones sistema nervioso central, principalmente poblaciones neuronales. En concreto, han detectado niveles moderados hipocampo, amigdala, capas profundas corteza cerebral, retrosplenial piriforme, asi como capa molecular cerebelo. Estudios indican proteina varia situaciones donde interviene via receptor A1, ejemplo, realizado estudos privacion sueno prolongado son elevados. Asi mediante muestras cortezas cerebrales rata a las les tuvo vigilia durante 24 horas, valoraron CNT2, observando una disminucion hasta 25% respecto al control. Tras ocho horas recuperacion iniciales solo recuperaban forma parcial. Tambien modelos animales habia tratado con acido kainico para induccion convulsiones, aumentan medida pasa tiempo tras tratamiento. Esto seria consistente hecho incrementa sus patologicas A1 funcion neuroproteccion. La segunda consiste estudio expresion tejidos tumorales. Para esto generado desarrollado anticuerpos especificos contra isoformas humanas estas proteinas utilizado analisis pacientes tumores ginecologicos mama. Los resultados obtenidos nos perdida hCNT1 mas comun equilibrativos asocia subtipos histologicos peor pronostico pueden ser celula clara o adenocarcionomas. mama, citoplasmatica sobre todo nuclear encuentra asociada pronostico, ademas encontrar correlaciones positivas entre celulas algunos marcadores metabolismo nucleotidos DPD TS, negativas baja proliferacion celular bcl2 MIB. Si tenemos cuenta estado nodulo linfatico lo asociamos observamos estos dos factores combinados indicativos riesgo recaida. " SUMMARY: In this study, we analysed the concentrative transporter in rat brain and compared it with that of ENT1. Furthermore, evaluated their changes situation increased extracellular levels adenosine, such as sleep deprivation. mRNA was most prevalent amygdala, hippocampus, specific neocortical regions cerebellum. Total deprivation dramatically diminished amounts mRNA, whereas ENT1 remained unchanged. This decrease transcript suggests new physiological role for modulation adenosine levels. In part study report characterization 2 antibodies raised against hENT1 hENT2. These antisera, along previously characterized antibody have been used to analyze NT expression gynecologic cancers: by far isoform whose frequently reduced or lost types tumors analyzed. is related type tumor its subtype, protein loss being highly correlated poor prognosis histotypes. We also studied ninety breast cancer patients who were treated CMF after surgery. enzymes associated nucleotide metabolism assessed immunohistochemically. CNT1 mostly cytoplasmic, some staining.. Nuclear staining negatively decreased disease-free survival, percentage hCNT1-positive cells positively long term index indicative prognosis. A relative risk relapse high indexes, when parameter combined nodal status (positive) found, suggesting both parameters may reflect "

参考文章(322)
Ignacio M. Larráyoz, Francisco Javier Casado, Marçal Pastor-Anglada, M. Pilar Lostao, Electrophysiological Characterization of the Human Na+/Nucleoside Cotransporter 1 (hCNT1) and Role of Adenosine on hCNT1 Function Journal of Biological Chemistry. ,vol. 279, pp. 8999- 9007 ,(2004) , 10.1074/JBC.M311940200
Veronique W.T. Ruiz van Haperen, Gijsbert Veerman, Jan B. Vermorken, Godefridus J. Peters, 2',2'-Difluoro-deoxycytidine (gemcitabine) incorporation into RNA and DNA of tumour cell lines. Biochemical Pharmacology. ,vol. 46, pp. 762- 766 ,(1993) , 10.1016/0006-2952(93)90566-F
M. Johnson-Kozlow, Coffee Consumption and Cognitive Function among Older Adults American Journal of Epidemiology. ,vol. 156, pp. 842- 850 ,(2002) , 10.1093/AJE/KWF119
A. Poletti, R. Volpe, R. Manconi, E. Candiani, C. Rossi, A. Carbone, Effectiveness of a rapid immunohistologic method for tumor cell origin analysis. Journal of Immunological Methods. ,vol. 105, pp. 39- 43 ,(1987) , 10.1016/0022-1759(87)90411-X
Cornelius J. McGinn, Elizabeth M. Miller, Mary J. Lindstrom, Keith A. Kunugi, Patrick G. Johnston, Timothy J. Kinsella, The role of cell cycle redistribution in radiosensitization: implications regarding the mechanism of fluorodeoxyuridine radiosensitization. International Journal of Radiation Oncology Biology Physics. ,vol. 30, pp. 851- 859 ,(1994) , 10.1016/0360-3016(94)90360-3
Sylvia Y. M. Yao, Amy M. L. Ng, William R. Muzyka, Mark Griffiths, Carol E. Cass, Stephen A. Baldwin, James D. Young, Molecular Cloning and Functional Characterization of Nitrobenzylthioinosine (NBMPR)-sensitive (es) and NBMPR-insensitive (ei) Equilibrative Nucleoside Transporter Proteins (rENT1 and rENT2) from Rat Tissues Journal of Biological Chemistry. ,vol. 272, pp. 28423- 28430 ,(1997) , 10.1074/JBC.272.45.28423
Bonaventura Ruiz-Montasell, Joan Vicenç Martinez-Mas, Carlos Enrich, F.Javier Casado, Antonio Felipe, Marçal Pastor-Anglada, Early induction of Na+ -dependent uridine uptake in the regenerating rat liver FEBS Letters. ,vol. 316, pp. 85- 88 ,(1993) , 10.1016/0014-5793(93)81741-H
Douglas D. Ross, Dennis P. Cuddy, Molecular effects of 2′,2′-difluorodeoxycytidine (gemcitabine) on DNA replication in intact HL-60 cells Biochemical Pharmacology. ,vol. 48, pp. 1619- 1630 ,(1994) , 10.1016/0006-2952(94)90207-0
L. O. Trussell, M. B. Jackson, Adenosine-activated potassium conductance in cultured striatal neurons. Proceedings of the National Academy of Sciences of the United States of America. ,vol. 82, pp. 4857- 4861 ,(1985) , 10.1073/PNAS.82.14.4857
W. Wan, G. R. Sutherland, J. D. Geiger, Binding of the Adenosine A2 Receptor Ligand [3H]CGS 21680 to Human and Rat Brain: Evidence for Multiple Affinity Sites Journal of Neurochemistry. ,vol. 55, pp. 1763- 1771 ,(1990) , 10.1111/J.1471-4159.1990.TB04967.X