Objective: Exploring the clinical signification of high-mobility group box 1 protein(HMGB1) expression in infiltrating ductal carcinoma(IDC) breast tissue. Methods: The expression of HMGB1 protein in IDC breast tissue...Objective: Exploring the clinical signification of high-mobility group box 1 protein(HMGB1) expression in infiltrating ductal carcinoma(IDC) breast tissue. Methods: The expression of HMGB1 protein in IDC breast tissue was detected by immunohistochemistry, and the relations among size of tumour, lymph node metastasis, clinical staging, estrogen receptor(ER), progesterone receptor(PR) and human epidermal growth factor receptor 2(HER-2) were also analyzed. Results: Fortysix cases out of 60 cases of IDC breast tissue showed positive or strong positive HMGB1 expression(76.67%), statistical significance was observed between HMGB1 expression with clinical staging(P < 0.01), lymph node metastasis(P < 0.01), breast cancer ER(P < 0.05) and HER-2(P < 0.05), however same conclusion can not be drawn between HMGB1 with either size of tumour or PR expression(P > 0.05) in IDC breast tissue. Spearman analysis showed negative correlation between HMGB1 expression and ER, and positive correlation between HMGB1 expression and clinical staging, lymph node metastasis together with HER-2. Conclusion: It's promising that HMGB1 expression in IDC tissue can be one of biological indicators of poor prognosis.展开更多
High mobility group box chromosomal protein (HMGB1), an abundant eukaryotic nonhistone chromosomal protein, is previously known as a nuclear DNA-binding protein that stabilizes the structure and function of chromatin,...High mobility group box chromosomal protein (HMGB1), an abundant eukaryotic nonhistone chromosomal protein, is previously known as a nuclear DNA-binding protein that stabilizes the structure and function of chromatin, regulates gene transcription. Recent studies identify that extracellular HMGB1 as a late mediator of endotoxemia and sepsis.HMGB1 is released by activated macrophages,induces the release of other proinflammatory mediators,and mediates lethality when overexpressed. It may also be a key signal for eliciting immune responses to cellular injury and death.Moreover,the late kinetics of HMGB1,in compared with other proinflammatory cytokines such as TNF and IL-1,suggest that targeting HMGB1 may provide a wide and clinically accessible therapeutic window.Three independent strategies to inhibit HMGB1 release and action are now available:anti-HMGB1 antibodies,A box,and ethyl pyruvate. This review covers the general features of HMGB1 and progress in research on its newly role as a cytokine participating in the development of sepsis.展开更多
目的:表达人HMGB1 B box蛋白,制备其单克隆抗体(mAb),为进一步研究HMGB1 B box在免疫调节和抗感染免疫中的作用奠定基础。方法:将pET28-HMGB1 B box转化DH5α摇菌表达,使用His标记的蛋白纯化柱纯化、鉴定后免疫BALB/c小鼠,取免疫小鼠的...目的:表达人HMGB1 B box蛋白,制备其单克隆抗体(mAb),为进一步研究HMGB1 B box在免疫调节和抗感染免疫中的作用奠定基础。方法:将pET28-HMGB1 B box转化DH5α摇菌表达,使用His标记的蛋白纯化柱纯化、鉴定后免疫BALB/c小鼠,取免疫小鼠的脾细胞与Sp2/0细胞进行常规融合,经间接ELISA筛选阳性克隆,获得分泌人HMGB1 B box蛋白mAb的杂交瘤细胞株,通过ELISA、Western blot等方法鉴定其特性(mAb的效价、Ig类别及特异性)。结果:成功地建立了2株稳定分泌抗人HMGB1 B box的mAb细胞株,分别命名为1D2F4E3和2D4E3A2。2株mAb的免疫球蛋白类型均为IgG,Western blot显示,2株mAb均能与HMGB1 B box发生特异性反应,其滴度为1×106,mAb1 D2F4E3和2D4E3A2的A450值分别为0.324±0.093和0.296±0.085。结论:获得了2株分泌HMGB1 B box mAb的细胞株,为HMGB1 B box蛋白的生物学功能研究奠定了基础。展开更多
基金Supported by a grant from the Innovation Foundation of Excellent Intellectuals in Henan Province(No.2109901)
文摘Objective: Exploring the clinical signification of high-mobility group box 1 protein(HMGB1) expression in infiltrating ductal carcinoma(IDC) breast tissue. Methods: The expression of HMGB1 protein in IDC breast tissue was detected by immunohistochemistry, and the relations among size of tumour, lymph node metastasis, clinical staging, estrogen receptor(ER), progesterone receptor(PR) and human epidermal growth factor receptor 2(HER-2) were also analyzed. Results: Fortysix cases out of 60 cases of IDC breast tissue showed positive or strong positive HMGB1 expression(76.67%), statistical significance was observed between HMGB1 expression with clinical staging(P < 0.01), lymph node metastasis(P < 0.01), breast cancer ER(P < 0.05) and HER-2(P < 0.05), however same conclusion can not be drawn between HMGB1 with either size of tumour or PR expression(P > 0.05) in IDC breast tissue. Spearman analysis showed negative correlation between HMGB1 expression and ER, and positive correlation between HMGB1 expression and clinical staging, lymph node metastasis together with HER-2. Conclusion: It's promising that HMGB1 expression in IDC tissue can be one of biological indicators of poor prognosis.
文摘High mobility group box chromosomal protein (HMGB1), an abundant eukaryotic nonhistone chromosomal protein, is previously known as a nuclear DNA-binding protein that stabilizes the structure and function of chromatin, regulates gene transcription. Recent studies identify that extracellular HMGB1 as a late mediator of endotoxemia and sepsis.HMGB1 is released by activated macrophages,induces the release of other proinflammatory mediators,and mediates lethality when overexpressed. It may also be a key signal for eliciting immune responses to cellular injury and death.Moreover,the late kinetics of HMGB1,in compared with other proinflammatory cytokines such as TNF and IL-1,suggest that targeting HMGB1 may provide a wide and clinically accessible therapeutic window.Three independent strategies to inhibit HMGB1 release and action are now available:anti-HMGB1 antibodies,A box,and ethyl pyruvate. This review covers the general features of HMGB1 and progress in research on its newly role as a cytokine participating in the development of sepsis.
文摘目的:表达人HMGB1 B box蛋白,制备其单克隆抗体(mAb),为进一步研究HMGB1 B box在免疫调节和抗感染免疫中的作用奠定基础。方法:将pET28-HMGB1 B box转化DH5α摇菌表达,使用His标记的蛋白纯化柱纯化、鉴定后免疫BALB/c小鼠,取免疫小鼠的脾细胞与Sp2/0细胞进行常规融合,经间接ELISA筛选阳性克隆,获得分泌人HMGB1 B box蛋白mAb的杂交瘤细胞株,通过ELISA、Western blot等方法鉴定其特性(mAb的效价、Ig类别及特异性)。结果:成功地建立了2株稳定分泌抗人HMGB1 B box的mAb细胞株,分别命名为1D2F4E3和2D4E3A2。2株mAb的免疫球蛋白类型均为IgG,Western blot显示,2株mAb均能与HMGB1 B box发生特异性反应,其滴度为1×106,mAb1 D2F4E3和2D4E3A2的A450值分别为0.324±0.093和0.296±0.085。结论:获得了2株分泌HMGB1 B box mAb的细胞株,为HMGB1 B box蛋白的生物学功能研究奠定了基础。
