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1.
Rev. esp. enferm. dig ; 102(1): 20-31, ene. 2010. ilus, tab
Article in English | IBECS | ID: ibc-78230

ABSTRACT

Introducción: la angiogénesis juega un papel importante en la progresión de los tumores. El factor de crecimiento endotelial vascular (VEGF) es un importante regulador de la angiogénesis. En este trabajo se han analizado los polimorfismos de único nucleótido (SNP) -2578C > A, -1154G > A y +936C > T del gen VEGF en pacientes intervenidos de carcinoma colorrectal, así como su posible implicación pronóstica. Pacientes y método: el estudio de estos SNP se ha realizado en 177 pacientes intervenidos quirúrgicamente de carcinoma colorrectal (CCR) en el Hospital Clínico San Carlos. El análisis de los polimorfismos se realizó con sondas específicas para cada nucleótido y se determinó mediante una reacción multiplex mediante real time PCR. Resultados: de los 3 polimorfismos estudiados sólo encontramos relación estadísticamente significativa del SNP +936C > T con el sexo y la localización. El 10,7% de los pacientes heterocigotos para este SNP tenían como localización el tumor en colon proximal, el 35,2% en colon distal y el resto en recto (p = 0,03). La supervivencia global (SG) de los pacientes con el genotipo +936T/T fue del 100%. Conclusión: los pacientes con el genotipo +936T/T presentan mayor supervivencia y el polimorfismo +936C > T podría ser una herramienta de ayuda en el seguimiento y terapéutica de este grupo de pacientes(AU)


Background: angiogenesis plays an important role in tumor progression. The vascular endothelial growth factor (VEGF) is an important regulator of angiogenesis. In the present study we evaluated single nucleotide polymorphisms (SNPs) -2578C > A, - 1154G > A, and +936C > T in the VEGF gene, and their prognostic value for patients operated on for colorectal cancer (CRC). Patients and method: VEGF polymorphisms have been analyzed in 177 patients who had undergone surgical resection at Hospital Clínico San Carlos. The analysis of these polymorphisms was performed with specific probes for each nucleotide in a multiplex reaction using real-time PCR. Results: we only found a statistically significant relationship for one of these three polymorphisms, +936C > T, with gender and tumor location; 10.7% of patients heterozygotes for this SNP had tumors located in proximal colon, 35.2% in distal segment and 54.1% in rectum (p = 0.03). Patients with the +936T/T genotype had 100% overall survival (OS). Conclusion: patients with a +936T/T genotype showed increased survival, therefore the +936C > T SNP could be a useful marker in the follow-up and clinical management of patients with colorectal cancer(AU)


Subject(s)
Humans , Male , Female , Middle Aged , Colorectal Neoplasms/complications , Colorectal Neoplasms/diagnosis , Polymorphism, Genetic/genetics , Prognosis , Colorectal Neoplasms/surgery , Carcinoma/complications , Carcinoma/diagnosis , Carcinoma/surgery , Colorectal Neoplasms/physiopathology , Colorectal Neoplasms , /genetics , Polymerase Chain Reaction/methods , Polymerase Chain Reaction/statistics & numerical data , Informed Consent/standards , DNA/analysis , DNA
2.
Clin. transl. oncol. (Print) ; 11(8): 544-547, ago. 2009. tab
Article in English | IBECS | ID: ibc-123673

ABSTRACT

MATERIAL AND METHODS: A prospective study was conducted to determine the value of changes in circulating tumour cell (CTC) levels prior to and after the first cycle of neoadjuvant treatment in early prediction of pathologic response in locally advanced breast cancer (LABC). Two blood samples were obtained from 72 eligible LABC patients to isolate and enumerate CTCs before neoadjuvant chemotherapy started on day 1, and on day 21, immediately before second cycle administration. RESULTS: Sixty patients (83.3%) had <1 CTC in the first sample and response rates in this cohort were pathologic complete response (PCR) in 2 patients (5%), partial response (PR) in 35 (87.5%), stable disease (SD) in 2 (5%) and progressive disease (PD) in 1 (2.5%). Twelve patients (16.7%) had >2 CTCs in the first sample; these patients were more likely to have triple negative tumours. All 12 had fewer CTCs in the second sample. Response rates in this second cohort of 12 patients were PCR in 4 (34%), PR in 6 (50%), SD in 1 (8%) and PD in 1 (8%). PCR rate was markedly better in this second cohort (p<0.0042; OR 14.5, 95% CI 2.3-92). DISCUSSION: This study suggests that the presence of CTCs prior to neoadjuvant therapy might be a predictor of response to this therapy (AU)


Subject(s)
Humans , Female , Breast Neoplasms/pathology , Neoplastic Cells, Circulating , Neoplastic Cells, Circulating/pathology , Antineoplastic Combined Chemotherapy Protocols/therapeutic use , Cohort Studies , Neoadjuvant Therapy/methods , Neoadjuvant Therapy , Prospective Studies
3.
Arch. prev. riesgos labor. (Ed. impr.) ; 3(4): 153-159, oct.-dic. 2000. tab
Article in Spanish | IBECS | ID: ibc-135491

ABSTRACT

CAREX es un sistema de información internacional sobre exposiciones laborales a carcinógenos conocidos y sospechosos en los 15 países de la Unión Europea. La base de datos de CAREX (CARcinogen EXposure) proporciona datos de exposición seleccionados y estimaciones del número de trabajadores expuestos por país, carcinógeno e industria. CAREX incluye datos de 139 agentes evalua­ dos por la lnternational Agency for Research on Cancer para cada uno de los 55 sectores de actividad económica de acuerdo a la clasificación de las Naciones Unidas. Las exposiciones laborales a estos carcinógenos fueron estimadas para el período 1990­1993. Alrededor de 32 millones de trabajadores (23% de los empleados) en los 15 países de la UE y 3,1 millones de trabajadores en España estaban expuestos a algunos de los agentes cancerígenos. En España, entre las exposiciones más frecuentes, se identificaron la radia­ción solar (1.084.000 trabajadores expuestos al menos el 75% de la jornada laboral), el humo de tabaco ambiental (670.000 trabaja­ dores expuestos el 75% del tiempo), el sílice cristalino (405.000 expuestos), el polvo de madera (398.000), el radón y sus productos de desintegración (280.000), el humo de escape de motor Diesel (274.000), el benceno (90.000), los metales pesados, tales como el cromo (57.000), el cadmio (16.000) o el níquel (43.000), el amianto (57.000) y formaldehído (71.000). El número de trabajadores expuestos a carcinógenos conocidos o sospechosos generados por CAREX constituye las primeras estimaciones publicadas para la UE y para España. Aunque estas estimaicones deberían ser consideradas como preliminares, indica claramente que a principios de los años noventa existía un elevado número de trabajadores expuestos a cancerígenos en su lugar de trabajo (AU)


CAREX is an international information system for the estimation of the numbers of workers exposed to established and suspected human carcinogens in the member states of the European Union (EU). The CAREX database was designed to provide selected ex­ posure data and documented estimates of the number of workers exposed to carcinogens by country, carcinogen, and industry. CA­ REX includes data on 139 agents evaluated by the lnternational Agency for Research on Cancer, displayed across the 55 industrial classes. Occupational exposures were estimated for 1990­199 3. About 32 million workers (23% of those employed) in the EU and 3.1 million workers in Spain were exposed to any carcinogen agents. The more common exposures in Spain were solar radiation (1,084,000 workers exposed at least 75% of working time), environmental tobacco smoke ( 670,000 workers exposed at least 7 5% of working time), crystalline silica ( 405 ,000 exposed), wood dust (398,000), Diesel exhaust benzene (90,000), chromium VI compounds (57,000), cadmium (16,000), nickel (43,000), asbestos (57,000), and formaldehyde (71,000). The number of workers exposed to established and suspected human carcinogens generated by the CAREX has been the first published estimates for EU and Spain. These preliminary estimates indicare that in the early 1990s, a substancial proportion of workers in the EU were exposed to carcinogen (AU)


Subject(s)
Humans , Male , Female , Carcinogens, Environmental/isolation & purification , Carcinogens, Environmental/poisoning , 16359/adverse effects , 16359/classification , Information Technology/classification , Information Technology/methods , Hydrocarbons/analysis , Hydrocarbons/chemical synthesis , Carcinogens, Environmental/adverse effects , Carcinogens, Environmental/chemical synthesis , 16359/analysis , 16359/prevention & control , Information Technology/policies , Hydrocarbons/isolation & purification , Hydrocarbons/toxicity , Spain/ethnology
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