Résumé
In order to investigate the role of interleukin-4 (IL-4) in experimental murine systemic Candidiasis, we created the intact and dexamethasone-induced immunosuppressed murine systemic Candidiasis models. In these models, two-site ELISA and RT-PCR were applied to determine the level of IL-4 protein and mRNA expression in spleens respectively, clone forming units (CFUs) of infected kidneys were determined with the plating dilution method, and mean survival time (MST) of the mice was recorded. The results showed that, when compared with the controls, protein level of IL-4 increased in both intact mice infected with lethal doses of yeast (day 3, P<0.05; day 7, P<0.001) and immunosuppressed mice infected with sublethal doses of yeast (day 3, P>0.05; day 7, P<0.05). Furthermore, the level of IL-4 was higher on day 7 than on day 3 after infection (P<0.001 and P<0.05 respectively in two groups). The tendency of IL-4mRNA expression was similar with that of IL-4 protein. As for fungal loads in kidneys, CFUs were significantly higher on day 7 than on day 3 after infection (P<0.001 in both groups). Mice in both groups succumbed to infection within several days. It was suggested that IL-4 might play a promoting role in the development of murine systemic Candidiasis.
Résumé
To investigate the possible role of interleukin (IL)-10 and IL-12 in the pathogenesis of psoriatic lesions and to supply theoretical basis for the gene therapy for psoriasis, the expression of IL-10 and IL-12 P35, P40 mRNA in 12 cases of psoriatic lesions and 6 normal skin tissues was detected by using RT-PCR technique. The results showed that the expression of IL-10 mRNA in the psoriatic lesions was significantly lower than that in the normal skin tissues (P<0.001). The expression of IL-12 P35 was positive both in the psoriatic lesions and in the normal skin tissues. IL-12 P40 mRNA was expressed positively only in the psoriatic lesions but negatively in the normal skin tissues. It was suggested that IL-12 might take an important role in the occurrence and progression of psoriasis, but IL-10 might have certain role in the regression of psoriasis.
Résumé
In order to investigate the role of interleukin-4 (IL-4) in experimental murine systemic Candidiasis, we created the intact and dexamethasone-induced immunosuppressed murine systemic Candidiasis models. In these models, two-site ELISA and RT-PCR were applied to determine the level of IL-4 protein and mRNA expression in spleens respectively, clone forming units (CFUs) of infected kidneys were determined with the plating dilution method, and mean survival time (MST) of the mice was recorded. The results showed that, when compared with the controls, protein level of IL-4 increased in both intact mice infected with lethal doses of yeast (day 3, P<0.05; day 7, P<0.001) and immunosuppressed mice infected with sublethal doses of yeast (day 3, P>0.05; day 7, P<0.05). Furthermore, the level of IL-4 was higher on day 7 than on day 3 after infection (P<0.001 and P<0.05 respectively in two groups). The tendency of IL-4mRNA expression was similar with that of IL-4 protein. As for fungal loads in kidneys, CFUs were significantly higher on day 7 than on day 3 after infection (P<0.001 in both groups). Mice in both groups succumbed to infection within several days. It was suggested that IL-4 might play a promoting role in the development of murine systemic Candidiasis.
Résumé
To investigate the possible role of interleukin (IL)-10 and IL-12 in the pathogenesis of psoriatic lesions and to supply theoretical basis for the gene therapy for psoriasis, the expression of IL-10 and IL-12 P35, P40 mRNA in 12 cases of psoriatic lesions and 6 normal skin tissues was detected by using RT-PCR technique. The results showed that the expression of IL-10 mRNA in the psoriatic lesions was significantly lower than that in the normal skin tissues (P<0.001). The expression of IL-12 P35 was positive both in the psoriatic lesions and in the normal skin tissues. IL-12 P40 mRNA was expressed positively only in the psoriatic lesions but negatively in the normal skin tissues. It was suggested that IL-12 might take an important role in the occurrence and progression of psoriasis, but IL-10 might have certain role in the regression of psoriasis.
Résumé
Objective To study the expression and the role of interferon-gamma (IFN-?)in murine systemic infection of Scedosporum apiospermum. Methods The murine models of systemic Scedosporum apiospermum infection was established by inoculation of the pathogenic fungi. ELISA and RT-PCR were applied to detect the expression level of IFN-? protein and mRNA in spleens, respectively. Colony formingunit (cfu) of infected kidneys was determined with the plating dilution method. The mean survival time (MST) of the mice was also recorded. Results IFN-? levels in lethal infection group were lower than those of the normal controls (P 0.05 on day 7). IFN-? levels of sublethal infection group were higher than those of normal controls (P 0.05 on day 7). But the IFN-? levels were significantly lower in the immunosuppressed group than those in the sublethal infection group (P
Résumé
Objective To investigate the change of interle ukin -4(IL -4)in experimental murine systemic candidiasis.Methods In the dexamethasone -induced immuno -suppressed murine systemic can-didiasis models and control healthy mice,two -site ELISA and RT -PCR were applied to determine the levels of IL -4protein or mRNA expression in th e spleens respectively.Colony form ing units(CFUs )of infected kidneys were determined with the plating dilution method,and the mean survival t ime (MST)of mice was also recorded.Results The IL -4concentration in the spleen of healthy mice was 80.1?19.1pg /g.I n contrast,in those infected with lethal dose of yeasts t he concentrations of IL -4were 124.8?24.1pg /g and 262.8?21.8pg /g on 3days or 7days after infection respectively.Meanwhile,the fungal lo ads in kidneys were(21.25?6.31)?102CFUs and(57.52?10.41)?102 CFUs on 3days or 7days after infectio n(P