[Objective] This study was to identify the expression of exogenous antimicrobial peptide in transgenic Houttuynia cordata Thunb. plants,and analyze their resistance to stem rot disease. [Methods] SDS-PAGE and Western ...[Objective] This study was to identify the expression of exogenous antimicrobial peptide in transgenic Houttuynia cordata Thunb. plants,and analyze their resistance to stem rot disease. [Methods] SDS-PAGE and Western blot analysis were employed to detect expression of exogenous antimicrobial peptide in transgenic H. cordata plants. Both wild type and transgenic H. cordata plants were inoculated with different concentrations of Rhizoctonia solani spores for detecting their resistance. [Results] The exogenous antimicrobial peptide was detected at translation level. The optimal parameters for detecting the resistance of transgenic H. cordata plants to R. solani was inoculation of spores at a concentration of 3×105 ind./ml and cultured for three days. The results showed that resistance of transgenic H. cordata plants to R. solani was enhanced in comparison with CKs. [Conclusion] Expression of exogenous antimicrobial peptide can enhance the resistance of transgenic H. cordata plants to stem rot disease.展开更多
应用超声波直接转化法、农杆菌介导转化法、恒定频率的超声波仪处理植物15 min后再用农杆菌介导法侵染植物和在农杆菌侵染过程中辅助以超声波处理10 s 4种方法对鱼腥草进行转基因研究,结果显示:上述4种转化法对gus基因最大瞬时表达率依...应用超声波直接转化法、农杆菌介导转化法、恒定频率的超声波仪处理植物15 min后再用农杆菌介导法侵染植物和在农杆菌侵染过程中辅助以超声波处理10 s 4种方法对鱼腥草进行转基因研究,结果显示:上述4种转化法对gus基因最大瞬时表达率依次为47%、60%、80%和75%。结论:用恒定频率的超声波仪处理植物15 min后再用农杆菌介导法侵染植物和在农杆菌侵染过程中辅助以超声波处理10 s两种转化法gus基因的瞬时表达率最高,说明超声波辅助农杆菌介导遗传转化方法是一种高效的鱼腥草转基因方法,它实现了外源基因在植物中的高效表达。展开更多
目的探讨青藤碱(sinomenine,SIN)对肿瘤坏死因子-α(tumor necrosis factor-α,TNF-α)刺激的大鼠成纤维样滑膜细胞(fibroblast-like synoviocytes,FLS)增殖及α7烟碱型乙酰胆碱受体(α7 nicotinic acetylcholine receptors,α7n ACh R)...目的探讨青藤碱(sinomenine,SIN)对肿瘤坏死因子-α(tumor necrosis factor-α,TNF-α)刺激的大鼠成纤维样滑膜细胞(fibroblast-like synoviocytes,FLS)增殖及α7烟碱型乙酰胆碱受体(α7 nicotinic acetylcholine receptors,α7n ACh R)、Toll样受体2(toll-like receptor 2,TLR2)和Toll样受体4(toll-like receptor 4,TLR4)表达的影响。方法组织块法分离培养原代FLS,流式细胞术检测FLS表面标志物CD90。FLS设对照组、TNF-α组、SIN组(100,200,400μmol·L^(-1)),SIN组给予SIN干预30 min后,TNF-α组、SIN组均给予20 ng·m L^(-1)TNF-α刺激24 h,采用MTT法检测各组FLS增殖,酶联免疫吸附(ELISA)法检测细胞上清白细胞介素-6(interleukin-6,IL-6)分泌量,RT-PCR法检测α7n ACh R、TLR2和TLR4 m RNA表达及Western bolt法检测α7n ACh R、TLR2和TLR4蛋白表达。结果 TNF-α刺激FLS后,细胞明显增殖,分泌IL-6明显增加,α7n ACh R、TLR2和TLR4 m RNA及蛋白表达增加,SIN(200,400μmol·L^(-1))能抑制FLS增殖,抑制IL-6分泌,并且下调α7n ACh R、TLR2和TLR4 m RNA及蛋白表达。结论 FLS增殖与α7n ACh R、TLR2和TLR4表达相关,且SIN能抑制FLS增殖,并下调α7n ACh R、TLR2和TLR4表达。展开更多
基金Supported by National Natural Science Foundation of China(30772737)~~
文摘[Objective] This study was to identify the expression of exogenous antimicrobial peptide in transgenic Houttuynia cordata Thunb. plants,and analyze their resistance to stem rot disease. [Methods] SDS-PAGE and Western blot analysis were employed to detect expression of exogenous antimicrobial peptide in transgenic H. cordata plants. Both wild type and transgenic H. cordata plants were inoculated with different concentrations of Rhizoctonia solani spores for detecting their resistance. [Results] The exogenous antimicrobial peptide was detected at translation level. The optimal parameters for detecting the resistance of transgenic H. cordata plants to R. solani was inoculation of spores at a concentration of 3×105 ind./ml and cultured for three days. The results showed that resistance of transgenic H. cordata plants to R. solani was enhanced in comparison with CKs. [Conclusion] Expression of exogenous antimicrobial peptide can enhance the resistance of transgenic H. cordata plants to stem rot disease.
文摘目的探讨青藤碱(sinomenine,SIN)对肿瘤坏死因子-α(tumor necrosis factor-α,TNF-α)刺激的大鼠成纤维样滑膜细胞(fibroblast-like synoviocytes,FLS)增殖及α7烟碱型乙酰胆碱受体(α7 nicotinic acetylcholine receptors,α7n ACh R)、Toll样受体2(toll-like receptor 2,TLR2)和Toll样受体4(toll-like receptor 4,TLR4)表达的影响。方法组织块法分离培养原代FLS,流式细胞术检测FLS表面标志物CD90。FLS设对照组、TNF-α组、SIN组(100,200,400μmol·L^(-1)),SIN组给予SIN干预30 min后,TNF-α组、SIN组均给予20 ng·m L^(-1)TNF-α刺激24 h,采用MTT法检测各组FLS增殖,酶联免疫吸附(ELISA)法检测细胞上清白细胞介素-6(interleukin-6,IL-6)分泌量,RT-PCR法检测α7n ACh R、TLR2和TLR4 m RNA表达及Western bolt法检测α7n ACh R、TLR2和TLR4蛋白表达。结果 TNF-α刺激FLS后,细胞明显增殖,分泌IL-6明显增加,α7n ACh R、TLR2和TLR4 m RNA及蛋白表达增加,SIN(200,400μmol·L^(-1))能抑制FLS增殖,抑制IL-6分泌,并且下调α7n ACh R、TLR2和TLR4 m RNA及蛋白表达。结论 FLS增殖与α7n ACh R、TLR2和TLR4表达相关,且SIN能抑制FLS增殖,并下调α7n ACh R、TLR2和TLR4表达。
