Carboxymethytl Pachymaram Up-Regulates Dendritic Cell's Function in Hepatitis B Virus Transgenic Mice in vitro

The effect ofcarboxymethytl pachymaram （ CMP ） on the function of dendritic cells（DCs） derived from spleens of hepatitis B virus transgenic mice are studied in vitro. The phenotypes of DCs are tested by flow cytometry （FCM）, cytokines measured by ELISA. The expression of DCs＇ phenotypes in IdBV transgenic mice are low （CD80^＋CD11c^＋：59.12±11.53 vs 9,60±4.53, p〈0.01; CD80^＋ MHC-Ⅱ^＋： 44.86±12.31 vs 9.80±5,72, p〈0.01, normal mice vs HBV transgenic mice）, the ability of DCs stimulating T lymphocytes proliferation decreases （0.37±0.11 vs 0.20±0,11, p〈0.05, normal mice vs HBV transgenic mice）, levels of IL-12 and IFN-y decrease whereas the level of IL-10 increases; CMP can enhance DCs＇ ability of stimulating T lymphocytes proliferation, facilitate the secretion of IL-12 and IFNp, inhibit the secretion of IL-10, thus up regulates DCs function. The results show a good prospective use of CMP on the treatment of chronic hepatitis B.

羧甲基茯苓多糖上调HBV转基因小鼠树突状细胞功能

采用1％羧甲基茯苓多糖（CMP）腹腔注射，摘取乙型肝炎病毒（HBV）转基因小鼠脾脏，制备淋巴细胞，MTT（噻唑蓝粉剂）法观察CMP对淋巴细胞的毒性作用；经粒-巨噬细胞集落刺激因子（GM-CSF）和白细胞介素-4（IL-4）培养转基因小鼠脾脏来源树突状细胞（DC），ELISA法检测DC分泌IL-12以及刺激混合淋巴细胞反应T淋巴细胞分泌IL-10、IFN-γ的含量．CMP在0～500mg／L浓度对HBV转基因小鼠无毒性作用，并能显著促进HBV转基因小鼠DC分泌IL-12，在混合淋巴细胞反应中，能显著促进T淋巴细胞分泌IFN—γ并抑制IL-10的分泌，从而上调DC功能．

羧甲基茯苓多糖抑制人外周血源性树突状细胞凋亡的体外研究

目的 :探讨羧甲基茯苓多糖(carboxymethytl pachymaram,CMP)对人外周血源性树突状细胞(dendritic cells,DC)凋亡的影响。方法:人外周血单核细胞经rh GM-CSF和IL-4诱导分化为不成熟DC。LPS诱导成熟的基础上分别加入不同浓度的CMP(终浓度为10、50、100 mg/L),以不加CMP为对照组,应用流式细胞术检测细胞凋亡率和趋化因子受体CCR7表达情况,Q-PCR检测CCR7基因表达情况,Western blot检测磷酸化Akt、Akt蛋白表达情况。结果:经CMP处理后DC凋亡率低于对照组,而CCR7的表达高于对照组,磷酸化Akt蛋白表达亦增高,且呈剂量依赖趋势。100 mg/L CMP处理组细胞凋亡率显著低于对照组,差异有统计学意义(P<0.01)。50 mg/L和100 mg/L CMP处理组CCR7的表达和磷酸化Akt蛋白均显著高于对照组,差异均有统计学意义(P<0.05)。结论:CMP能抑制成熟DC的凋亡,其机制可能是通过上调CCR7的表达,经PI3K/Akt信号通路发挥作用。

羧甲基茯苓多糖体外抗艾滋病病毒作用研究

目的观察羧甲基茯苓多糖(CMP)体外抗艾滋病病毒(HIV)作用。方法通过观察CMP对HIV-1ⅢB诱导感染C8166细胞致细胞病变的抑制实验及对HIV-1ⅢB感染MT4细胞的保护实验进行CMP抗HIV-1活性研究。结果同对照组相比,10.000,1.000和0.100 g.L-1CMP对C8166细胞培养上清液HIV-1ⅢB P24抗原的分泌有抑制作用(P<0.05),IC50为1.8 g.L-1,10.000和1.000 g.L-1CMP对感染HIV-1ⅢB的MT4细胞有保护作用(P<0.05),EC50为0.5 g.L-1。结论CMP体外有一定的抗HIV病毒的作用。

Carboxymethytl pachymaram up-regulates dendritic cell function in hepatitis B virus transgenic mice

Carboxymethytl pachymaram(CMP)was administered to HBV transgenic mice through abdominal injection.Lymphocytes were extracted from the spleens.MTT method was used to detect cytotoxicity of CMP.Dendritic cells(DCs)were separated from lymphocytes and incubated with granulocyte-macrophage colony-stimulating factor(GM-CSF)and interleukin-4(IL-4).Phenotypes of DC’s were assayed by flow cytometry(FCM).IL-12 released by DCs and IL-10 and IFN-γ produced by T cells in mixed lymphocyte reaction(MLR)were measured using ELISA.Results showed that CMP within the concentration of 0–500 mg/mL did not produce cytotoxicity to lymphocytes and could even increase DC phenotypes,and IL-12 level in HBV transgenic mice.It could also increase the secretion of IFN-c,and inhibit the secretion of IL-10 inMLR.Thus it can up-regulateDC function.

羧甲基茯苓多糖对人外周血源性树突状细胞SOCS-1基因甲基化及体外成熟的影响

目的：通过检测羧甲基茯苓多糖（ carboxymethytl pachymaram ，CMP）处理后人外周血源性树突状细胞（dendritic cells，DC）中细胞因子信号转导抑制分子-1（SOCS-1）基因甲基化水平及表达情况，探讨 CMP 对 DC 体外成熟的影响。方法通过重组人粒细胞-巨噬细胞集落刺激因子（rhGM-CSF）和IL-4体外诱导人外周血源性单核细胞源DC，并促进成熟，分别加入不同浓度的CMP （终浓度为10、50、100 mg/L），应用甲基化特异性PCR（ methylation specific PCR ，MSP）和real-time PCR法分别分析SOCS-1基因甲基化水平及表达情况；应用流式细胞术、混合淋巴细胞反应（ MLR）和ELISA分别检测DC的表面标志、刺激淋巴细胞增殖能力和IL-12分泌的变化。结果经CMP刺激后DC中SOCS-1基因甲基化水平明显增高，SOCS-1基因表达水平显著降低，表面标志（ CD80、CD83、CD86、HLA-DR）、刺激淋巴细胞增殖能力及IL-12的分泌水平均上调，且呈剂量依赖趋势。50 mg/L和100 mg/L CMP刺激组SOCS-1基因甲基化水平、IL-12分泌量及刺激淋巴细胞增殖指数均显著高于对照组，SOCS-1基因表达水平显著低于对照组。100 mg/L CMP刺激组CD80、CD83和HLA-DR表达水平显著高于对照组。结论 CMP能促进人外周血源性DC中SOCS-1基因甲基化，减少SOCS-1基因表达，进而促进其体外成熟。