Micronutrientes en el tratamiento de la infertilidad tratamiento de la infertilidad masculina idiopática / Micronutrient supplementation to treat idiopathic male infertilityidiopathic male infertility

Introducción: la evidencia sobre la asociación entre dieta y fertilidad humana ha aumentado en forma exponencial en la última década, lo que ha permitido identificar algunos hallazgos claros. La infertilidad masculina es un problema común que está incrementando. Aunque algunos pacientes tienen causas hormonales anatómicas o funcionales reconocidas, la etiología exacta en un gran número de casos es desconocida. Discusión: en diferentes condiciones de infertilidad masculina, generalmente asociadas a anomalías morfofuncionales de los espermatozoides, existen pruebas claras de daño celular causados por el estrés oxidativo. En las últimas 5 décadas, varias investigaciones han intentado comprobar si la suplementación de micronutrientes puede tener efectos positivos en los parámetros cualitativos/cuantitativos del semen y la frecuencia de embarazo. Las vitaminas C y E, junto con la L-carnitina, han demostrado ser eficaces. Sin embargo, otros micronutrientes han sido menos estudiados. Conclusiones: existe la necesidad de realizar más investigaciones con estudios controlados aleatorios para conformar la eficacia y seguridad de los suplementos antioxidantes en el tratamiento médico de la infertilidad masculina idiopática. El objetivo de esta revisión fue evaluar los efectos de los micronutrientes en el tratamiento de la infertilidad masculina

Introduction: in the last decade, evidence of a relation between diet and human fertility has exponentially increased, allowing the identiffcation of some clear outcomes. Male infertility is an increasing common concern. Although some patients have known anatomical, hormonal or functional disorders, the exact etiology remains unknown in a great number of cases. Discussion: in different types of male infertility, generally associated with abnormalities in sperm morphology or function, there is clear evidence of cell damage caused by oxidative stress. In the last 5 decades, several research studies have aimed to demonstrate if micronutrient supplementation may have a positive effect on qualitative/quantitative semen parameters and pregnancy rate. Vitamins C and E, together with L-carnitine, have shown to have a positive effect. However, other micronutrients have been studied to a lesser extent. Conclusions: further research by means of randomized controlled trials is required to conffrm the effcacy and safety of antioxidant supplements to medically treat idiopathic male infertility. The objective of this review was to evaluate the effects of micronutrients in the treatment of male infertility.

Radioterapia y 5-fluorouracilo-cisplatino en el tratamiento del cáncer de cuello uterino de alto riesgo / Radiotherapy and 5-fluorouracil-cisplatin treatment for high-risk uterine cervical cancer

Objetivo: evaluar la eficacia de la combinación de radioterapia y 5-fluorouracilo-cisplatino en el tratamiento del cáncer de cuello uterino de alto riesgo. Materiales y métodos: estudio retrospectivo en el que se revisaron los datos de pacientes tratadas en el periodo enero 2009 a diciembre 2019 en el Hospital Central "Dr. Urquinaona", Maracaibo, Venezuela. Se revisaron los registros clínicos de todas las pacientes sometidas a histerectomía radical y linfadenectomía pélvica bilateral que recibieron quimio-radioterapia concurrente adyuvante con 5-fluorouracilo-cisplatino (grupo de tratamiento) y se compararon con quienes no fueron manejadas con este régimen, las que no recibieron ningún tratamiento adyuvante o solo fueron tratadas con radioterapia (grupo control). Se evaluaron las características generales, efectos adversos del tratamiento, recurrencias de la enfermedad y supervivencia. Resultados: para el análisis final quedaron 164 pacientes, de las cuales 115 (70,1%) fueron del grupo de tratamiento y 49 (29,9%) del control. No se encontraron diferencias estadísticamente significativas en las características clínicas entre ambos grupos (p = ns); sí las hubo en la frecuencia de recurrencias a distancia (p = 0,0056). La supervivencia libre de progresión y la global de ambos grupos no mostraron diferencias significativas (p = 0,2678 y p = 0,3452). Conclusión: no existen beneficios evidentes del uso de 5-fluorouracilo-cisplatino desde el punto de vista de progresión o supervivencia general, en pacientes con carcinoma cuello uterino de alto riesgo.

Objective: to evaluate the efficacy of radiotherapy combined with 5-fluorouracil-cisplatin in the treatment of high-risk uterine cervical cancer. Materials and methods: Retrospective study, in which the data of patients treated between January 2009 and December 2019 at Hospital Central "Dr. Urquinaona", Maracaibo, Venezuela, was analyzed. The clinical records of all patients who underwent radical hysterectomy and bilateral pelvic lymphadenectomy and received adjuvant concurrent chemoradiotherapy with 5-fluorouracil-cisplatin (treatment group) compared with those patients not managed with this regimen, those who did not receive any adjuvant treatment or received only radiotherapy (control group), were reviewed. The general characteristics, treatment adverse effects, disease recurrences and survival rate were evaluated. Results: 164 patients remained for the final analysis, of which 115 (70.1%) were in the treatment group and 49 (29.9%) in the control group. No statistically significant differences were found in the clinical characteristics of patients between the two groups (p = ns); while differences in the distant recurrence rate (p = 0.0056) were found. Progression-free survival and overall survival in both groups did not show significant differences (p = 0.2678 and p = 0.3452). Conclusion: there is no evident benefit of the use of 5-fluorouracil-cisplatin in terms of progression or overall survival in patients with high-risk cervical carcinoma.

Photo-induced interaction of antibacterial quinolones with human serum albumin.

The absorption and fluorescence spectrums of four antibacterial quinolones, namely, ciprofloxacin, norfloxacin, enoxacin, and cinoxacin, were studied in the presence of human serum albumin (HSA). Of the three fluoroquinolones studied, ciprofloxacin and norfloxacin were found to bind efficiently to HSA when irradiated with visible light, whereas the third, enoxacin, bound only moderately. On the other hand, cinoxacin, a nonfluorinated quinolone of the first generation, did not show any interaction with HSA. The findings were inferred by monitoring the evolution of the fluorescence spectrums of the solutions as a function of time. A direct relationship between the capacity of the photo-induced defluorination to produce aryl cation intermediates, and the subsequent binding reaction with HSA, was observed and is discussed.