RESUMEN
ABSTRACT Objective: To reveal the effect of 2100 MHz radio frequency (RF) radiation on thyroid tissues of rats in the 10 days (group E1) and 40 days (group G1) exposure groups. Methods: In this study, 30 healthy female Wistar albino rats, weighing 200−256 g each, were used. The animals were randomly divided into four groups (E1, E2, G1 and G2). Groups E2 and G2 served as the control groups. The exposure groups were exposed to 2100 MHz RF radiation emitted by a generator, simulating a 3G-mobile phone for 6 hours/day, 5 consecutive days/week, at the same time of the day (between 9 am and 3 pm), for 10 days (group E1) and 40 days (group G1). Results: Catalase and xanthine oxidase enzyme activities were compared between the groups E1 and E2; it was found that the difference was statistically significant (p < 0.05). Between the groups G1 and G2, the difference was found to be significant with respect to catalase activities. Tissue samples of the early and late groups showed no serious pathological findings in the histopathological examination. Conclusion: We believe that comprehensive, clinical and experimental studies are needed to assess the effect of the RF exposure duration and dosage of exposure on thyroid tissues.
Asunto(s)
Animales , Femenino , Ratas , Dosis de Radiación , Glándula Tiroides/efectos de la radiación , Anomalías Inducidas por Radiación , Ratas Wistar , Modelos AnimalesRESUMEN
Coxiella burnetii is the bacterium that causes Q fever. Human infection is mainly transmitted from cattle, goats and sheep. The disease is usually self-limited. Pneumonia and hepatitis are the most common clinical manifestations. In this study, we present a case of Q fever from the western part of Turkey mimicking Crimean-Congo haemorrhagic fever (CCHF) in terms of clinical and laboratory findings.
Asunto(s)
Congo , Coxiella burnetii/aislamiento & purificación , Diagnóstico Diferencial , Fiebre Hemorrágica de Crimea/diagnóstico , Fiebre Hemorrágica de Crimea/patología , Humanos , Pulmón/diagnóstico por imagen , Masculino , Persona de Mediana Edad , Fiebre Q/diagnóstico , Fiebre Q/patología , Radiografía Torácica , Tomografía Computarizada por Rayos X , TurquíaRESUMEN
Nitric oxide (NO) is endogenous mediator of numerous physiological processes that range from regulation cardiovascular function and neurotransmission to antipathogenic and tumoricidal responses. This study was designed to investigate the possible role of NO during erythroid differentiation in K562 erythroleukemia cells. The chronic myelogenous leukemia (K562) cell line can be triggered in culture to differentiate along the erythrocytic pathway, in response to a variety of stimulatory agents. In this study, K562 cells were induced to synthesize hemoglobin by hemin. We investigated NOx (nitrate+nitrite) levels in uninduced (control) and hemin-induced K562 cell lysates during erythroid differentiation. Our results showed that NO levels decreased significantly on fourth and sixth day both in hemin-induced and control cells; the decrease was, however, more in hemin-induced group than in control group.