ABSTRACT
Objective To observe the effects of Ganlu Xiaodu Dan and its incomplete prescription on expressions of MiR-146a and TLR4 mRNA in RD cells infected by EV71. Methods With technique of cell culturing, Ganlu Xiaodu Dan therapy group, incomplete Qing prescription therapy group, incomplete Li prescription therapy group, normal cells control group, model control group and ribavirin control group were set, and tests for virus toxicity and medicine toxicity in cells were taken, then expressions of miRNA-146a and TLR4 mRNA in these RD cells 24 hours after intervention with medicine were detected. Results Compared with normal cells control group, miR-146a in mRNA model control group decreased and TLR4 mRNA increased. Compared with model control group, miR-146a mRNA in Ganlu Xiaodu Dan therapy group, incomplete Qing prescription therapy group and incomplete Li prescription therapy group all increased while TLR4 mRNA decreased, and differences between ribavirin control group and model control group were not significant. Compared with Ganlu Xiaodu Dan therapy group, both expressions of miR-146a and TLR4 mRNA in incomplete Qing prescription therapy group were lower; miR-146a increased and TLR4 mRNA decreased in incomplete Li prescription therapy group. Compared with incomplete Qing prescription therapy group, miR-146a mRNA in incomplete Li prescription therapy group increased, but expression of TLR4mRNA between them was not significant. Conclusion Ganlu Xiaodu Dan can regulate the immune reactions caused by infection of EV71 by increasing expression of miR-146a mRNA and reducing expression of TLR4 mRNA. There may be antagonism effect between incomplete Qing prescription and incomplete Li prescription.
ABSTRACT
【Objective】To observe the dynamic interference of cellular endotoxin specific receptors of Toll-like receptor 4(TLR4) mRNA and nuclear factor ?B p65(NF-?B p65) in rats with damp-heat syndrome of seasonal febrile disease by Ganlu Xiaodu Dan(GXD),and to explore the therapeutic mechanism of prescriptions with the actions of clearing heat and resolving dampness.【Methods】Wistar rats were randomized into 3 groups: A(normal control),B(models established by feeding of high-fat diet and colon bacillus under the high-temperature and high-humidity condition),and C(rat models treated with GXD).Reverse transcription-polymerase chain reaction(RT-PCR) analysis was used to detect the TLR4 mRNA level in hepatic macrophages and immunohistochemical method was used to detect the activation of NF-?B p65.【Results】The expression of TLR4 mRNA and NF-?B p65 was increased gradually in group B 6,12 and 24 hours after infection with colon bacillus,and the differences were significant,indicating that the expression of TLR4 mRNA and NF-?B p65 increased with the prolongation of disease course.In group C,TLR4 mRNA expression was decreased in different time points after infection,the difference of TLR4 mRNA expression 12 and 24 hours after infection was significant as compared with group B and group A(P