小毛莨内酯对结核病人颗粒裂解肽基因表达的作用

Effects of Ternatolide on expression granulysin mRNAin the peripheral blood lymphocytes patients with mycobacterium tuberculosis

目的 研究小毛莨内酯 (Ternatolide ,Tern)对健康成人 ,初诊未治、耐药肺结核病人及儿童结核患儿周围血淋巴细胞 (PBL)体外活化后颗粒裂解肽 (granulysin ,GLS)mRNA表达的作用 ,探索其抗结核菌的分子免疫学机理。方法 采用反转录聚合酶链反应半定量 (QC RT PCR)方法 ,测定不同剂量的Tern对以上 4组人群PBL颗粒裂解肽mRNA表达水平的影响。结果 当Tern在 10 0mg·L-1,2 0 0mg·L-1浓度时 ,均能诱导以上 4组人群体外活化的PBLGLSmRNA的表达 ,且各组诱导表达水平无显著差异。结论 Tern可能是通过提高CTL的效应分子GLSmRNA表达的水平 ,杀灭胞内致病菌MTB ,其诱导作用呈现剂量依赖性。

AIM To study the effects of ternatolide(tern) on expression of granulysin mRNA in the activated peripheral blood lymphocytes(PBLS) of the adults and children with pulmonary Mycobacterium tuberculosis(PMTB). METHODS Using competitive quantitative reverse transcription polymerase chain reaction(QC TR PCR)analyze granulysin gene expression in the PBLs. RESULTS The dosage of 100 mg·L -1 , 200mg·L -1 of ternatolide significantly enhanced the granulysin mRNA experession in PBLs in vitro stimulated phytohemagglutinin (PHA) from adults and children with PMTB (P<0 001). The increase of granulysin mRNA expressing level in drug resistance MTB group no difference compared with no drug resistance group by stimulated tern (P>0 05). CONCLUSION The molecular mechanism of tern. against intracellular pathogens might be associated with the inducting highly level on the expression of granulysin mRNA, a anti bacterial peptide in activated human cytotoxic lymphocytes.