RESUMO
More than 40,000 species of spiders have been identified in the world. Spider bites is a common problem among people, however few of them are harmful but delay in treatment can cause death. Since the spider bites are risk full to human, they should be taken seriously, especially in endemic areas. Our objective in this review was to study about poisonous spiders and find out treatments of them. Therefore, we collected related articles from PubMed database and Google Scholar. Three important syndromes caused by spider bites are loxoscelism, latrodectism and funnel web spider syndrome. Many treatments are used but much more studies should have done to decrease the mortality. In this review, we describes different venomous spiders according to their appearance, symptoms after their bites and available treatments
RESUMO
Hydroxyurea [HU] is currently used for beta thalassemia treatment through induction of fetal gamma-globin, In this study, effects of different concentrations of hydroxyurea on induction of gamma-globin gene in K562 cells, and inhibitory effect of siRNA against candidate gene which may be involved in HU mediated gamma-globin induction were assessed. In this eperimantal study, K562 cells were treated by different concentrations of HU [0, 50, 100 and 200 microM]. siRNA against candidate gene in HU mediated gamma-globin gene induction was transfected to K562 cells using lipofectamine 2000. The level of gammal-globin gene induction and inhibition were determined by quantitavie real-time PCR. There were 1.75-, 2.45- and 2.55- fold inductions in gamma-globin gene using 50, 100 and 200 microM HU, respectively. There has been 79.5% down regulation on candidate gene in siRNA transfected K562 cells. This study showed that gamma-globin induction in 100 microM HU is similar to 200 micro M HU treated K562 cells. There was also efficient inhibitory effect on candidate gene which may be involved in HU mediated gamma-globin induction