目的研究马尔尼菲青霉对巨噬细胞模式识别受体TLR-2、TLR-4、Dectin-1的表达及促炎因子TNF-α分泌的影响。方法马尔尼菲青霉酵母相菌液与小鼠腹腔巨噬细胞共培养24h,采用流式细胞技术检测巨噬细胞TLR-2、TLR-4及Dectin-1的平均荧光强度...目的研究马尔尼菲青霉对巨噬细胞模式识别受体TLR-2、TLR-4、Dectin-1的表达及促炎因子TNF-α分泌的影响。方法马尔尼菲青霉酵母相菌液与小鼠腹腔巨噬细胞共培养24h,采用流式细胞技术检测巨噬细胞TLR-2、TLR-4及Dectin-1的平均荧光强度;共聚焦显微镜观察荧光染色的受体;ELISA法测定培养液上清中TNF-α的浓度;Real time PCR检测不同时间段TNF-α的mRNA表达。结果马尔尼菲青霉可使巨噬细胞TLR-2、TLR-4、Dectin-1的平均荧光强度均增高,并激活巨噬细胞产生TNF-α。结论马尔尼菲青霉上调了巨噬细胞模式识别受体TLR-2、TLR-4及Dectin-1的表达,巨噬细胞的激活与TLR-2、TLR-4及Dectin-1的表达上调相关。展开更多
Regenerating gene (Reg or REG) family, within the superfamily of C-type lectin, is mainly involved in the liver,pancreatic, gastric and intestinal cell proliferation or differentiation. Considerable attention has focu...Regenerating gene (Reg or REG) family, within the superfamily of C-type lectin, is mainly involved in the liver,pancreatic, gastric and intestinal cell proliferation or differentiation. Considerable attention has focused on Reg family and its structurally related molecules. Over the last 15 years, 17 members of the Reg family have been cloned and sequenced. They have been considered as members of a conserved protein family sharing structural and some functional properties being involved in injury, inflammation,diabetes and carcinogenesis. We previously identified Reg Ⅳ as a strong candidate for a gene that was highly expressed in colorectal adenoma when compared to normal mucosa based on suppression subtractive hybridization (SSH),reverse Northern blot, semi-quantitative reverse transcriptase PCR (RT-PCR)and Northern blot. In situ hybridization results further support that overexpression of Reg Ⅳ may be an early event in colorectal carcinogenesis. We suggest that detection of Reg Ⅳ overexpression might be useful in the early diagnosis of carcinomatous transformation of adenoma.This review summarizes the roles of Reg family in diseases in the literature as well as our recent results of Reg Ⅳ in colorectal cancer. The biological properties of Reg family and its possible roles in human diseases are discussed. We particularly focus on the roles of Reg family as sensitive reactants of tissue injury, prognostic indicators of tumor survival and early biomarkers of carcinogenesis. In addition to our current understanding of Reg gene functions, we postulate that there might be relationships between Reg family and microsatellite instability, apoptosis and cancer with a poor prognosis. Investigation of the correlation between tumor Reg expression and survival rate, and analysis of the Reg gene status in human maliganancies, are required to elucidate the biologic consequences of Reg gene expression, the implications for Reg gene regulation of cell growth, tumorigenesis, and the progression of cancer. It needs to be further attested whether Reg gene family is applicable in early detection of cancer and whether Reg and Reg-related molecules can offer novel molecular targets for anticancer therapeutics. This has implications with regard to prognosis, such as in monitoring cancer initiation,progression and recurrence, as well as the design of chemotherapeutic drugs.展开更多
文摘目的研究马尔尼菲青霉对巨噬细胞模式识别受体TLR-2、TLR-4、Dectin-1的表达及促炎因子TNF-α分泌的影响。方法马尔尼菲青霉酵母相菌液与小鼠腹腔巨噬细胞共培养24h,采用流式细胞技术检测巨噬细胞TLR-2、TLR-4及Dectin-1的平均荧光强度;共聚焦显微镜观察荧光染色的受体;ELISA法测定培养液上清中TNF-α的浓度;Real time PCR检测不同时间段TNF-α的mRNA表达。结果马尔尼菲青霉可使巨噬细胞TLR-2、TLR-4、Dectin-1的平均荧光强度均增高,并激活巨噬细胞产生TNF-α。结论马尔尼菲青霉上调了巨噬细胞模式识别受体TLR-2、TLR-4及Dectin-1的表达,巨噬细胞的激活与TLR-2、TLR-4及Dectin-1的表达上调相关。
基金National Natural Science Foundation of China,No.30200333 and No.30371605
文摘Regenerating gene (Reg or REG) family, within the superfamily of C-type lectin, is mainly involved in the liver,pancreatic, gastric and intestinal cell proliferation or differentiation. Considerable attention has focused on Reg family and its structurally related molecules. Over the last 15 years, 17 members of the Reg family have been cloned and sequenced. They have been considered as members of a conserved protein family sharing structural and some functional properties being involved in injury, inflammation,diabetes and carcinogenesis. We previously identified Reg Ⅳ as a strong candidate for a gene that was highly expressed in colorectal adenoma when compared to normal mucosa based on suppression subtractive hybridization (SSH),reverse Northern blot, semi-quantitative reverse transcriptase PCR (RT-PCR)and Northern blot. In situ hybridization results further support that overexpression of Reg Ⅳ may be an early event in colorectal carcinogenesis. We suggest that detection of Reg Ⅳ overexpression might be useful in the early diagnosis of carcinomatous transformation of adenoma.This review summarizes the roles of Reg family in diseases in the literature as well as our recent results of Reg Ⅳ in colorectal cancer. The biological properties of Reg family and its possible roles in human diseases are discussed. We particularly focus on the roles of Reg family as sensitive reactants of tissue injury, prognostic indicators of tumor survival and early biomarkers of carcinogenesis. In addition to our current understanding of Reg gene functions, we postulate that there might be relationships between Reg family and microsatellite instability, apoptosis and cancer with a poor prognosis. Investigation of the correlation between tumor Reg expression and survival rate, and analysis of the Reg gene status in human maliganancies, are required to elucidate the biologic consequences of Reg gene expression, the implications for Reg gene regulation of cell growth, tumorigenesis, and the progression of cancer. It needs to be further attested whether Reg gene family is applicable in early detection of cancer and whether Reg and Reg-related molecules can offer novel molecular targets for anticancer therapeutics. This has implications with regard to prognosis, such as in monitoring cancer initiation,progression and recurrence, as well as the design of chemotherapeutic drugs.
