目的建立检测泡球蚴感染小鼠IL-17的实时荧光定量RT-PCR方法,并用于泡球蚴病小鼠IL-17基因检测。方法通过腹腔注射100μl泡球蚴组织匀浆液建立泡球蚴感染小鼠模型,感染1个月后处死,提取肝脏总RNA,反转录得到cDNA;登陆GenBank,得到IL-17基因（U43088.1）全序列,选取保守序列,应用pri mer 5设计引物,β-actin作为内参,以10倍梯度稀释IL-17 PCR产物为标准品,进行实时荧光定量RT-PCR以确定方法的特异性和灵敏度;绘制标准曲线,确定IL-17基因检测的最佳条件。结果用建立的实时定量RT-PCR检测IL-17基因无非特异性扩增,各样品熔解温度均在81.0℃,熔解峰单一;mRNA检出限为1×102pg,106~102pg总RNA均有扩增;泡球蚴感染1个月后,IL-17基因表达显著增加,感染组和对照组分别为（0.008728±0.000984）和（0.003823±0.00082）,差异有统计学意义（P〈0.05）。结论成功建立了小鼠源IL-17基因实时定量RT-PCR检测体系。经检测,小鼠感染泡球蚴1个月后IL-17基因表达增加,表明IL-17在泡球蚴感染免疫调节中可能起重要作用。
Background Hepatic alveolar echinococcosis （AE） is a parasitic disease in humans and caused by the Echinococcus multilocularis （Em）. Orthotopic liver transplantation （OLT） may be the only effective treatment for end-stage hepatic AE. However, in some AE patients, extrahepatic Em can not be completely eliminated after OLT. We aimed to study whether the immunological changes caused by Em evasion may influence the rejective response. Methods Rat modles of AE were established by injecting the Em suspension into abdomen of Brown Norway （BN） rats. Three months later, in the experimental group, the liver was transplanted from Lewis （LEW） rats to Em-infected BN rats. In the control group, transplantation was from LEW rats to healthy BN rats. Liver tissue and peripheral blood （PB） samples were collected on days 1, 3, 5, and 7 after OLT. Liver tissue was analyzed after hematoxylin and eosin （H＆E） staining; numbers of CD4, CD8, and CD28 on peripheral blood cells were detected by flow cytometry; and expression of the chemokine fractalkine （Fkn） was detected by reverse transcription PCR （RT-PCR）. Interleukin-10 （IL-10） was measured in the serum by enzyme-linked immunosorbent assay （ELISA）. In every group, eight BN rats were retained for observing survival time. Results The survival times of recipients in the experimental group were prolonged compared with those in the control group. The rejective response occurred later and was milder in the experimental group, percentage of CD4, CD8, CD28 T-cells and Fkn mRNA expression were lower in the experimental group. While the serum IL-10 levels were higher in the experimental group than those in the control group. Conclusions Acute rejective response after OLT was attenuated in the rats with Em infection, and the recipients＂ survival time was prolonged. Em may play a role in this process by elevating IL-10 secretion, decreasing the effector T cells, inhibiting the expression of Fkn, which lead to reduce the inflammatory cells infiltrati
LI TaoZHAO Jin-mingZHANG YanPAI Zu-laZHANG WeiTuxun Tuer-hongjiangBAI LeiWU JiangWEN Hao
