Objective To explore the immune stimulation effect of recombinant E.coli LLO/OVA on mice bone marrow-derived dendritic cells （BMDCs） and T lymphocytes in vitro.Methods After BMDCs stimulated by E.coli LLO/OVA,their ...Objective To explore the immune stimulation effect of recombinant E.coli LLO/OVA on mice bone marrow-derived dendritic cells （BMDCs） and T lymphocytes in vitro.Methods After BMDCs stimulated by E.coli LLO/OVA,their Toll-like receptor （TLR） and nucleotide-binding oligomerization domain （NOD） receptor signalling pathway were examined by superarray hybridization;and the priming effect of the vaccine activated BMDCs on CD4＋T and CD8＋T was determined by [3H]thymidine uptake and ELISA,the tumor cytotoxic effect of activated CD8＋T cells was determined by cytotoxic assay.Results After BMDCs were activated by E.coli LLO/OVA via TLR4,NOD1 receptor and NF-κB signalling pathway,the expression of their surface molecules including MHC class Ⅰ,MHC class Ⅱ,CD40,CD80 and CD86 significantly up-regulated;the secretion of IL-12 and IFN-？ increased also.The mature BMDCs stimulated the allergic CD4＋T and CD8＋T cells proliferation and their IL-2 and IFN-γ secretion,and the activated CD8＋T cells effectively killed B16-OVA melanoma cells and RMA-S/OVA lymphoma cells in vitro.Conclusion E.coli LLO/OVA is effective in inducing BMDCs maturation via activating TLR4 and NOD1 receptor signalling pathway and promoting specific anti-tumor T cell immunity in vitro.展开更多
Little information was so far available about allergenic mechanism of the roasted peanut allergens during initial stages of allergy.The purpose of this study was to determine the influence of roasting(150℃,20 min)on ...Little information was so far available about allergenic mechanism of the roasted peanut allergens during initial stages of allergy.The purpose of this study was to determine the influence of roasting(150℃,20 min)on biochemical and biological properties of Ara h 3,a major peanut allergen.Allergenicity of roasted peanut emulsion to mice,differences in uptakes between Ara h 3 purified from raw peanuts(named as Ara h 3-Raw)and that purified from roasted peanuts(named as Ara h 3-Roasted)by bone marrow-derived dendritic cells(BMDCs)and the implication of cell surface receptors involving in uptake,and changes in glycosylation and structure of Ara h 3 after roasting were analyzed in this study.This study suggested that roasting increased allergenicity of peanut to BALB/c mice.Maillard reaction and structural changes of Ara h 3 induced by roasting significantly altered the uptake of Ara h 3-Roasted by BMDCs,and modified Ara h 3 fate in processes involved in immunogenicity and hyper allergenicity,indicating that food processing pattern can change food allergenicity.展开更多
Objective:Epithelial cancers often originate from progenitor cells,while the origin of hepatocellular carcinoma(HCC)is still controversial.HCC,one of the deadliest cancers,is closely linked with liver injuries and chr...Objective:Epithelial cancers often originate from progenitor cells,while the origin of hepatocellular carcinoma(HCC)is still controversial.HCC,one of the deadliest cancers,is closely linked with liver injuries and chronic inflammation,which trigger massive infiltration of bone marrow-derived cells(BMDCs)during liver repair.Methods:To address the possible roles of BMDCs in HCC origination,we established a diethylnitrosamine(DEN)-induced HCC model in bone marrow transplanted mice.Immunohistochemistry and frozen tissue immunofluorescence were used to verify DENinduced HCC in the pathology of the disease.The cellular origin of DEN-induced HCC was further studied by single cell sequencing,single-cell nested PCR,and immunofluorescence-fluorescence in situ hybridization.Results:Studies by using single cell sequencing and biochemical analysis revealed that HCC cells in these mice were coming from donor mice BMDCs,and not from recipient mice.Furthermore,the copy numbers of mouse orthologs of several HCC-related genes previously reported in human HCC were also altered in our mouse model.DEN-induced HCCs exhibited a similar histological phenotype and genomic profile as human HCCs.Conclusions:These results suggested that BMDCs are an important origin of HCC,which provide important clues to HCC prevention,detection,and treatments.展开更多
目的探讨髓样相关蛋白8(MRP8)、MRP14及其异二聚体MRP8/14对小鼠骨髓源性树突状细胞(BMDC)表型成熟的影响。方法体外培养及纯化小鼠BMDC,分为对照组、1μg/m L MRP14处理组、1μg/m L MRP8处理组、1μg/m L MRP8/14处理组。采用流式细...目的探讨髓样相关蛋白8(MRP8)、MRP14及其异二聚体MRP8/14对小鼠骨髓源性树突状细胞(BMDC)表型成熟的影响。方法体外培养及纯化小鼠BMDC,分为对照组、1μg/m L MRP14处理组、1μg/m L MRP8处理组、1μg/m L MRP8/14处理组。采用流式细胞术检测刺激后BMDC表面共刺激分子CD40、CD80、CD86、主要组织相容性复合体Ⅱ(MHCⅡ)的表达情况。结果 MRP14、MRP8及MRP8/14均能促进BMDC表面共刺激分子CD40、CD80、CD86表达,MRP14、MRP8均能促进BMDC表面共刺激分子MHCⅡ表达,且MRP14和MRP8/14促进BMDC表达CD80、CD86的能力强于MRP8。结论 MRP14、MRP8及MRP8/14通过增加BMDC表面共刺激分子的表达而促进BMDC的表型成熟,且MRP8、MRP14及MRP8/14三者促进DC表达各种共刺激分子的能力不同。展开更多
基金supported by a grant from the State Scholarship Fund under the China Scholarship Council (No.2003850064)the Chongqing Education Commission (KJ080319)
文摘Objective To explore the immune stimulation effect of recombinant E.coli LLO/OVA on mice bone marrow-derived dendritic cells （BMDCs） and T lymphocytes in vitro.Methods After BMDCs stimulated by E.coli LLO/OVA,their Toll-like receptor （TLR） and nucleotide-binding oligomerization domain （NOD） receptor signalling pathway were examined by superarray hybridization;and the priming effect of the vaccine activated BMDCs on CD4＋T and CD8＋T was determined by [3H]thymidine uptake and ELISA,the tumor cytotoxic effect of activated CD8＋T cells was determined by cytotoxic assay.Results After BMDCs were activated by E.coli LLO/OVA via TLR4,NOD1 receptor and NF-κB signalling pathway,the expression of their surface molecules including MHC class Ⅰ,MHC class Ⅱ,CD40,CD80 and CD86 significantly up-regulated;the secretion of IL-12 and IFN-？ increased also.The mature BMDCs stimulated the allergic CD4＋T and CD8＋T cells proliferation and their IL-2 and IFN-γ secretion,and the activated CD8＋T cells effectively killed B16-OVA melanoma cells and RMA-S/OVA lymphoma cells in vitro.Conclusion E.coli LLO/OVA is effective in inducing BMDCs maturation via activating TLR4 and NOD1 receptor signalling pathway and promoting specific anti-tumor T cell immunity in vitro.
基金funded by the National Key Research and Development Program of China(2016YFD0501101)the project of Food Science Discipline Construction of Shanghai University and the National Natural Science Foundation of China(31201306)。
文摘Little information was so far available about allergenic mechanism of the roasted peanut allergens during initial stages of allergy.The purpose of this study was to determine the influence of roasting(150℃,20 min)on biochemical and biological properties of Ara h 3,a major peanut allergen.Allergenicity of roasted peanut emulsion to mice,differences in uptakes between Ara h 3 purified from raw peanuts(named as Ara h 3-Raw)and that purified from roasted peanuts(named as Ara h 3-Roasted)by bone marrow-derived dendritic cells(BMDCs)and the implication of cell surface receptors involving in uptake,and changes in glycosylation and structure of Ara h 3 after roasting were analyzed in this study.This study suggested that roasting increased allergenicity of peanut to BALB/c mice.Maillard reaction and structural changes of Ara h 3 induced by roasting significantly altered the uptake of Ara h 3-Roasted by BMDCs,and modified Ara h 3 fate in processes involved in immunogenicity and hyper allergenicity,indicating that food processing pattern can change food allergenicity.
基金supported by the grants from the National Natural Science Foundation of China(Grant No.81902401,81972656,31671421,81970107,81600083)the National 135 Major Project of China(Grant No.2018ZX10723204,2018ZX10302205)+3 种基金the Natural Science Foundation of Tianjin(Grant No.19JCQNJC09000)the Non-profit Central Research Institute Fund of Chinese Academy of Medical Sciences(2018PT32034)CAMS Innovation Fund for Medical Sciences(Grant No.2016-12M-1-003)supported by the China Scholarship Council(Grant No.201906940003)。
文摘Objective:Epithelial cancers often originate from progenitor cells,while the origin of hepatocellular carcinoma(HCC)is still controversial.HCC,one of the deadliest cancers,is closely linked with liver injuries and chronic inflammation,which trigger massive infiltration of bone marrow-derived cells(BMDCs)during liver repair.Methods:To address the possible roles of BMDCs in HCC origination,we established a diethylnitrosamine(DEN)-induced HCC model in bone marrow transplanted mice.Immunohistochemistry and frozen tissue immunofluorescence were used to verify DENinduced HCC in the pathology of the disease.The cellular origin of DEN-induced HCC was further studied by single cell sequencing,single-cell nested PCR,and immunofluorescence-fluorescence in situ hybridization.Results:Studies by using single cell sequencing and biochemical analysis revealed that HCC cells in these mice were coming from donor mice BMDCs,and not from recipient mice.Furthermore,the copy numbers of mouse orthologs of several HCC-related genes previously reported in human HCC were also altered in our mouse model.DEN-induced HCCs exhibited a similar histological phenotype and genomic profile as human HCCs.Conclusions:These results suggested that BMDCs are an important origin of HCC,which provide important clues to HCC prevention,detection,and treatments.
文摘目的探讨髓样相关蛋白8(MRP8)、MRP14及其异二聚体MRP8/14对小鼠骨髓源性树突状细胞(BMDC)表型成熟的影响。方法体外培养及纯化小鼠BMDC,分为对照组、1μg/m L MRP14处理组、1μg/m L MRP8处理组、1μg/m L MRP8/14处理组。采用流式细胞术检测刺激后BMDC表面共刺激分子CD40、CD80、CD86、主要组织相容性复合体Ⅱ(MHCⅡ)的表达情况。结果 MRP14、MRP8及MRP8/14均能促进BMDC表面共刺激分子CD40、CD80、CD86表达,MRP14、MRP8均能促进BMDC表面共刺激分子MHCⅡ表达,且MRP14和MRP8/14促进BMDC表达CD80、CD86的能力强于MRP8。结论 MRP14、MRP8及MRP8/14通过增加BMDC表面共刺激分子的表达而促进BMDC的表型成熟,且MRP8、MRP14及MRP8/14三者促进DC表达各种共刺激分子的能力不同。
