小钻木脂素类化合物戈米辛R的体外抗炎机制研究

目的 通过脂多糖(LPS)诱导活化小鼠单核巨噬细胞系RAW264.7建立炎症模型,探讨小钻木脂素类化合物戈米辛R对炎症细胞增殖及炎症因子分泌的影响,评价其抗炎活性及机制。方法 采用MTT比色法检测经LPS诱导的RAW264.7细胞存活率并计算半数抑制浓度(IC₅₀);采用ELISA法检测细胞上清液TNF-α、IL-1β、IL-6等炎症因子含量;利用RT-PCR法检测细胞TNF-α、IL-1β、IL-6、IκB-α、NF-κB p65的mRNA表达量;Western blot法检测细胞IκB-α及NF-κB p65蛋白表达量。结果 与LPS模型组比较,戈米辛R可显著抑制LPS诱导的RAW264.7细胞增殖;降低细胞分泌TNF-α、IL-1β及IL-6的含量;升高LPS所致降低的IκB-α mRNA的表达量同时降低LPS引起升高的TNF-α、IL-1β、IL-6、NF-κB p65的mRNA表达量;升高IκB-α并降低NF-κB p65的蛋白表达量,显示出良好的剂量依赖性,具有统计学差异(P<0.05)。结论 戈米辛R可通过抑制TNF-α、IL-1β、IL-6、NF-κB p65的mRNA和NF-κB p65蛋白的表达,增加IκB-α mRNA和IκB-α蛋白的表达,减少致炎因子TNF-α、IL-1β、IL-6的释放,从而发挥显著抗炎活性。     

柚皮苷通过抑制Kupffer细胞的焦亡改善脂多糖诱导的肝损伤

目的 探究柚皮苷(naringin,Nar)在脂多糖(LPS)诱导的肝损伤中的作用及相关作用机制。方法 60只C47BL/6野生型雄性小鼠随机分为4组(每组15只)：对照组(Control),柚皮苷组(Nar),脂多糖模型组(lipopolysaccharide,LPS)与柚皮苷组处理的LPS模型组(Nar+LPS),其中Nar组与Nar+LPS组小鼠予以100 mg·kg^-1·d^-1的柚皮苷持续灌胃10天,而LPS与LPS+Nar组小鼠经腹注射5 mg·kg^-1 LPS进行肝损伤造模,6 h后脱颈处死各组小鼠;试剂盒检测各组小鼠外周血中谷丙转氨酶(alanine transaminase,ALT)、谷草转氨酶(aspertate aminotransferase,AST)含量,ELISA检测炎症因子白介素-6(interlukin-6,IL-6)、白介素-1β(interlukin-1β,IL-1β)与肿瘤坏死因子-α(tumor necrosis factor-α,TNF-α)的水平;取小鼠肝脏组织,苏木精-伊红(h...     

八宝丹通过抑制NLRP3/Caspase-1通路减轻对乙酰氨基酚诱导的小鼠急性肝损伤

目的：研究八宝丹(BBD)对对乙酰氨基酚(APAP)诱导的急性肝损伤小鼠NOD样受体热蛋白结构域相关蛋白3/胱天蛋白酶-1(NLRP3/Caspase-1)通路蛋白的影响。方法：将C57BL/6小鼠随机分组,BBD(75、150、300 mg·kg^-1)灌胃给药3 d,2次/d,于末次给药后2 h,腹腔注射APAP(400 mg·kg^-1),14 h后摘眼球取血,随后脱颈椎处死取材。苏木素-伊红(HE)染色法观察肝组织细胞形态学变化;生化法检测各组小鼠血清中丙氨酸氨基转移酶(ALT)、天门冬氨酸氨基转移酶(AST)、超氧化物歧化酶(SOD)、丙二醛(MDA)和髓过氧化物酶(MPO)的活性;实时荧光定量聚合酶链式反应(Real-time PCR)检测小鼠肝脏中肿瘤坏死因子-α(TNF-α)、白细胞介素-1β(IL-1β)及白细胞介素-6(IL-6) mRNA表达水平;蛋白免疫印迹法(Western blot)检测小鼠肝脏中环氧化酶-2(COX-2)、诱导型一氧化氮合酶(iNOS)、NLRP3、Caspase-1、白细胞介素-18(IL-18)的...     

黄芩苷通过p38 MAPK/NLRP3通路对脂多糖诱导大鼠急性肺损伤的影响

目的:观察黄芩苷对脂多糖(LPS)诱导急性肺损伤模型大鼠的疗效及相关作用机制。方法:采用将80只健康雄性SD大鼠随机分为正常组,模型组,黄芩苷低、中、高剂量组,地塞米松组(DEX),SB203580组和黄芩苷+SB203580组(BA+SB203580),每组10只。黄芩苷低、中、高剂量组分别腹腔注射不同剂量(10,50,100 mg·kg^-1)的BA溶液;DEX组腹腔注射5 mg·kg^-1的DEX溶液;SB203580组腹腔注射0.5 mg·kg^-1的SB203580溶液;黄芩苷+SB203580组腹腔注射100 mg·kg^-1的BA溶液和0.5 mg·kg^-1的SB203580溶液;正常组和模型组均注射等体积的生理盐水,每天给药1次,连续7 d,末次给药1 h后,除正常组,其余大鼠均给予气管滴注5 mg·kg^-1LPS构建急性肺损伤模型,正常组大鼠气管滴注等体积的生理盐水溶液,12 h后结束实验,取材。苏木素-伊红(HE)染色观察肺组织病理学改变,进行支气管肺泡灌洗液(BALF)中细胞总数和中性粒细胞计数;测定肺组织湿/干重比、血清中超氧化物歧化酶(SOD)和丙二醛(MDA)的水平;免疫荧光法检测肺组织中活性氧(ROS)的含量,酶联免疫吸附测定法(ELISA)测定BALF中细胞因子白细胞介素-1β(IL-1β),白细胞介素-18(IL-18),白细胞介素-6(IL-6),肿瘤坏死因子-α(TNF-α)的含量;免疫组化(IHC)检测p-p38丝裂原活化蛋白激酶(MAPK)的表达的定位表达及蛋白免疫印迹法(Western blot)检测肺组织中p-p38 MAPK,硫氧还蛋白互作蛋白(TXNIP),NOD样受体蛋白3(NLRP3),半胱氨酸天冬氨酸蛋白水解酶-1(Caspase-1)蛋白表达情况。结果:与正常组比较,模型组大鼠肺组织出现炎性病理变化,肺湿/干质量,BALF中细胞总数及中性粒细胞数目增高(P<0.01),SOD活性下降(P<0.01),ROS和MDA含量升高(P<0.01),细胞因子IL-1β,IL-18,IL-6,TNF-α和p-p38 MAPK,NLRP3,Caspase-1的表达量均上调(P<0.01)。与模型组比较,黄芩苷组,SB203580组和黄芩苷+SB203580组可有效减轻LPS所致肺组织病理变化,降低肺湿/干质量,BALF中细胞总数及中性粒细胞数目(P<0.05,P<0.01),升高SOD活性(P<0.05,P<0.01),并降低ROS和MDA水平(P<0.05,P<0.01),细胞因子IL-1β,IL-18,IL-6,TNF-α和p-p38 MAPK,NLRP3,Caspase-1的表达量均明显下降(P<0.05,P<0.01)。结论:黄芩苷可有效保护LPS所致急性肺损伤,其作用机制可能与抑制p38 MAPK/NLRP3信号通路减轻炎症反应有关。     

小檗碱与6-姜烯酚配伍对溃疡性结肠炎小鼠肠道炎症和菌群影响的实验研究

寒热并用法是溃疡性结肠炎临床治疗的常用治法,黄连-干姜是体现寒热并用法的经典药对,该研究以黄连的有效成分小檗碱和干姜的有效成分6-姜烯酚联合应用,探究其对溃疡性结肠炎小鼠肠道炎症和肠道菌群的影响,揭示寒热并用法治疗溃疡性结肠炎的作用和机制。采用葡聚糖硫酸钠自由饮用诱导小鼠溃疡性结肠炎模型。分别给予小檗碱(100 mg·kg^-1)、6-姜烯酚(100 mg·kg^-1)、小檗碱(50 mg·kg^-1)联合6-姜烯酚(50 mg·kg^-1)灌胃,每日1次,给药20 d后取小鼠血清、结肠组织、粪便,苏木素-伊红染色法观察结肠病理组织学变化,阿利新蓝和过碘酸雪夫染色观察结肠组织黏液层变化,酶联免疫吸附法检测血清肿瘤坏死因子-α(tumor necrosis factor-α,TNF-α)、白细胞介素-1β(interleukin-1β,IL-1β)、白细胞介素-6(interleukin-6,IL-6)含量,免疫组织化学法检测结肠组织巨噬细胞表面标记物F4/80、黏蛋白-2(mucin-2)、闭合蛋白-1(c...     

常春藤皂苷元对葡聚糖硫酸钠诱导小鼠溃疡性结肠炎的作用及机制研究

目的 研究常春藤皂苷元对葡聚糖硫酸钠(DSS)诱导小鼠溃疡性结肠炎(UC)的作用及其机制。方法 (1)体外实验：用不同浓度(0、2.5、5、10、20、40μmol·L^-1)常春藤皂苷元处理RAW264.7细胞24 h后,采用MTT法检测细胞存活率。将RAW264.7细胞分为：空白组、脂多糖(LPS)组(1μg·L^-1)、LPS+2.5μmol·L^-1常春藤皂苷元组、LPS+5μmol·L^-1常春藤皂苷元组和LPS+10μmol·L^-1常春藤皂苷元组;采用LPS干预24 h建立体外细胞炎症模型,并用常春藤皂苷元共孵育24 h进行干预。采用ELISA法测定细胞上清液中白细胞介素1β(IL-1β)、IL-6、肿瘤坏死因子α(TNF-α)水平;Western Blot法检测细胞中TLR4/NF-κB通路相关蛋白的表达水平。(2)体内实验：将C57BL/6小鼠随机分为空白组、模型组、柳氮磺吡啶组(200 mg·kg^-1)及常春藤皂苷元低、中、高剂量组(12.5、2...     

柴黄益肾颗粒抑制巨噬细胞Mincle改善小鼠慢性肾病模型肾纤维化

目的 研究柴黄益肾颗粒对小鼠慢性肾病模型肾脏纤维化的影响及潜在作用机制。方法 将36只C57BL/6雄性小鼠随机均分为假手术组、模型组、柴黄益肾颗粒低剂量(3.835 g·kg^-1)组、柴黄益肾颗粒高剂量(7.67 g·kg^-1)组、阳性对照厄贝沙坦组和柴黄益肾颗粒高剂量+Mincle激动剂海藻糖-6,6-二苯甲酸酯(trehalose-6,6-dibehenate,TDB)组(术后1 h,一次性腹腔注射TDB 10 mg·kg^-1)。采用单侧输尿管结扎法(UUO)建立小鼠肾脏纤维化模型。术后1 h,各药物组给小鼠灌胃相应药物,假手术组和模型组灌胃生理盐水,每日1次,连续7 d。通过苏木精-伊红染色和天狼星红染色观察各组小鼠肾脏病理变化和纤维化改变,采用Real-time PCR和ELISA法检测各组肾脏中炎症因子白细胞介素(IL)-1β、IL-6和肿瘤坏死因子(TNF)-α的表达和分泌,免疫组化和Western Blot法检测纤维化指标α-SMA和Fn的蛋白水平,免疫荧光和Western Blot法检测Mincle及其...     

异黄柏酮酸对LPS诱导RAW264.7细胞炎症的抑制作用

目的 探讨异黄柏酮酸对脂多糖(LPS)诱导小鼠单核巨噬细胞白血病细胞(RAW264.7)炎症的作用及机制。方法 采用CCK-8法检测异黄柏酮酸对RAW264.7细胞活性的影响,Griess法及荧光法测定一氧化氮(NO)水平,酶联免疫吸附试验(ELISA)检测细胞上清中白细胞介素-6(IL-6)、肿瘤坏死因子-α(TNF-α)、白细胞介素-1β(IL-1β)、前列腺素E₂(PGE₂)和单核细胞趋化蛋白-1(MCP-1)水平,免疫荧光法检测NF-κB p65核转位,蛋白质免疫印迹(Western blot)法检测诱导型一氧化氮合酶(iNOS)、环氧化酶-2(COX-2)和NF-κB、MAPK信号通路相关蛋白表达。结果 异黄柏酮酸能降低LPS刺激RAW264.7细胞释放的NO水平(P<0.05),其IC₅₀为(39.6±3.05)μmol/L;同时,异黄柏酮酸降低了炎性介质PGE₂、TNF-α、IL-6、IL-1β和MCP-1水平(P<0.05),且在0～200μmol/L浓度条件下对RAW2...     

基于NLRP3/ASC/Caspase-1信号通路探讨独活醇提物对MSU诱导的痛风性关节炎的治疗作用

目的：通过体内和体外实验探讨独活醇提物(DH50)对尿酸钠(MSU)晶体诱导的痛风性关节炎的治疗作用及作用机制。方法：体内实验：将50只雄性SD大鼠,随机分为正常组、模型组、地塞米松组(DXMS,0.07 mg·kg^-1)、DH50低剂量组(DH50-D,9 mg·kg^-1)、高剂量组(DH50-G,18 mg·kg^-1)5组(n=10)。连续灌胃给药7 d,正常组和模型组给予等体积纯水,第5天向大鼠右侧踝关节注射MSU建立痛风性关节炎模型。测量造模后4、8、24、48 h的大鼠足跖容积并对关节炎症评分,苏木素-伊红(HE)染色检测大鼠滑膜组织病理形态的改变,酶联免疫吸附测定法(ELISA)检测大鼠滑膜组织匀浆中肿瘤坏死因子-α(TNF-α)、白细胞介素-1β(IL-1β)、白细胞介素-6(IL-6)的含量变化,蛋白免疫印迹法(Western blot)检测滑膜组织中NOD样受体蛋白3(NLRP3)、胱天蛋白酶-1(Caspase-1)、凋亡相关斑点样蛋白(ASC)、IL-1β、环氧化酶-2(COX-2)的蛋白表达情况。...     

白藜芦醇抑制TXNIP/NLRP3信号通路改善脂多糖诱导的肾小管上皮细胞炎性损伤

[目的]观察白藜芦醇对脂多糖诱导的肾小管上皮细胞(HK-2)炎性损伤的保护作用,及其对TXNIP/NLRP3炎性通路的影响。[方法]采用脂多糖(LPS,1 mg/L)体外诱导HK-2细胞炎性损伤模型,将细胞分为正常对照组、LPS诱导组、LPS+低剂量(50μmol/L)白藜芦醇组、LPS+中剂量(100μmol/L)白藜芦醇组、LPS+高剂量(200μmol/L)白藜芦醇组;CCK8法检测HK-2细胞相对存活率,酶联免疫吸附测定(ELISA)法检测炎性因子白介素-6(IL-6)、白介素-1β(IL-1β)及肿瘤坏死因子-α(TNF-α)水平,Western Blot方法分析诱导型一氧化氮合酶(iNOS)、环氧酶-2(COX-2)、人硫氧还蛋白互作蛋白(TXNIP)及人隐热蛋白(NLRP3)表达。[结果]与LPS诱导组比较,不同浓度白藜芦醇干预的HK-2细胞相对存活率明显升高(P0.05),细胞上清炎性因子IL-6、IL-1β及TNF-α水平明显降低(P0.05),细胞中炎性蛋白iNOS及COX-2表达水平显著降低(P0.05);细胞中TXNIP及NLRP3蛋白表达也显著降低(P0.05),并表现出剂量依赖性。[结论]白藜芦醇可以明显抑制LPS诱导的HK-2细胞炎症损伤,抑制炎症相关蛋白的表达,其作用机制可能与抑制TXNIP/NLRP3炎性通路活化相关。     

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??OBJECTIVE To explore the protection mechanism of orthogonal compatibility of puerarin(A),ligustrazine(B), astragaloside IV(C) and catalpolon(D),the main active ingredients from yangyin tongnao granules, on SD rats damaged by ischemic reperfusion injury, and select the optimal combination. METHODS SD rats were randomly divided into sham operation group, model group, orthogonal compatibility group and positive control group. The rat middle cerebral artery occlusion (MCAO) model was established. The compatibility of components was arranged by L₉(34) orthogonal design. The symptoms of neurological deficit in rats and the pathological changes in hippocampus were observed; TTC staining was used to detect the cerebral infarction volume. IHC was used to evaluate the expression of NLRP3 protein ischemic brain tissue. RT-PCR was used to detect the expressions of ASC, caspase-1, IL-1, mRNA, IL-18 and MMP-9 in the hippocampal of brain tissue. The RESULTS of orthogonal test were analyzed by range analysis. RESULTS The orthogonal combination groups could effectively improve neurological deficits in cerebral ischemia reperfusion injury, reduce infarction volume, inhibit the expression of NLRP3 inflammasome, decrease the expression of ASC, caspase-1, IL-1, IL-18 and MMP-9. The analysis of test results showed that the combination with ligustrazine 100 mg??kg^-1,puerarin 20 mg??kg^-1, astragaloside ?? 80 mg??kg^-1 and catalpol 20 mg??kg^-1 was the superior one. CONCLUSION The main active ingredients combination of yangyin tongnao granules played a protective mechanism on focal cerebral ischemia reperfusion injury rats. Its mechanism might be related to inhibition of NLRP3 inflammasome,down-regulation of ASC, caspase-1, IL-1, IL-18 and MMP-9.     

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??OBJECTIVE To investigate the effect of ??-secretase inhibitor DAPT in inflammation-induced brain white matter injury in neonatal mice.METHODS Sixty C57BL/10J neonatal mice are randomly divided into control group, control+DAPT (10 mg??kg^-1) group, inflammation (LPS) group, LPS+DAPT group (inflammation exposure after 10 mg??kg^-1 DAPT treatment). All neonatal mice were killed and brain was removed to the following observation and detection:at P5, the mRNA expression variation of IL-1??, IL-8,TNF-??,Hes1 and NICD by Real-time PCR methods. Oligodendrocytes were identified by immunofluorescence staining. Myelin basic protein (MBP) protein expression was detected by Western blot assay.RESULTS LPS group showed brain injury characterized by inhibition of brain development. There were significant differences in mRNA expression of IL-1??, IL-8, TNF-??, Hes1 and NICD between LPS+DAPT group and LPS group (P<0.05), and the mRNA expression of IL-1??, IL-8,TNF-??,Hes1 and NICD in inflammation-treated were significantly increased than control group (P<0.05). The results showed more expression of MBP in LPS+DAPT group compared with LPS group (P<0.05). Compared with the blank control group, which was obviously decreased after 48 h of inflammation (P<0.05).CONCLUSION Inflammation leads to abnormal of notch signal expression in neonatal mice, and which is shows inflammation involved in brain damage.Its mechanism is probably associated with the maturation of oligodendrocytes.     

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??OBJECTIVE To investigate the nephroprotective effect of danzhi jiangtang capsule(DJC) on diabetic rats induced by streptozotocin(STZ) and elucidate its mechanism. METHODS Model of diabetic rats were established by combination of high-fat diet-fed and low-dose STZ injection in SD rats. The successful models were chosen and randomly divided into model group, low-dose and high-dose of DJC(600, 2 000 mg??kg^-1, ig)groups, each consisting of 8 rats. Control and model groups were administered equal volume of distilled water. After 8 weeks of treatment, the rats were killed and serum was separated to detect blood lipid, renal function and oxidative stress. The kidneys were weighed, and the renal indexes were calculated. Renal tissue specimens were fixed for HE and PAS staining; the expressions of JAK2, STAT3, p-JAK2, p-STAT3 in the kidneys were observed by Western blot; the renal inflammatory factors TNF-??, IL-6 and MCP-1 were detected by ELISA. RESULTS Fasting blood glucose (FBG), blood lipid, renal index, oxidative stress of model group were significantly increased, renal function was reduced, and the morphology of renal tissue changed significantly. The renal inflammatory cytokine TNF-??, IL-6 and MCP-1 and the expressions of p-JAK2, p-STAT3 increased significantly in diabetes mellitus rats. After 8 weeks of treatment, blood lipid and oxidative stress in DJC groups were decreased, but there was no obvious difference in FBG between DJC groups and model group, the renal function and the pathological changes of renal tissue were improved obviously. The expressions of inflammatory cytokine(TNF-??, IL-6 and MCP-1), p-JAK2 and p-STAT3 in renal cortex were significantly down-regulated. CONCLUSION The nephroprotective effect of DJC is based on its antioxidant effect and anti-inflammatory effect via suppression of JAK2/STAT3 signal transduction.     

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??OBJECTIVE To investigate the effects of microwave radiation on learning and memory abilities in mice,and to study pilose antler peptide??s intervention. METHODS Fifty mice were divided into five groups randomly, designated as control group, radiation group, pilose antler peptide (25, 50, and 100 mg??kg^-1) groups. Learning and memory impairment model in mice was established by microwave radiation of 2 450 MHz average surface power, 10.0 mW??cm^-2 for 90 min every day for 28 d .The radiation rats were treated with low-, mid-, and high-dose (25, 50, and 100 mg??kg^-1) pilose antler peptide by sc injection for 28 d. The learning and memory ability of mice was determined by avoiding darkness experiment and Y maze experiment.The contents of S100B, tumor necrosis factor-??(TNF-??), interleukin-10(IL-10), malondialdehyde (MDA), and nitric oxide(NO) in the brain of mice were determined respectively after the behavioral experiments. RESULTS Compared with control group, radiation group could shorten the latency of avoiding darkness experiments, increase the numbers of errors both in avoiding darkness experiment and in Y maze experiment. Radiation group could rise the contents of S100B ,TNF-??, IL-10, MDA and NO in the brain of mice (P<0.05 or P<0.01). Compared with radiation group, pilose antler peptide (50, 100 mg??kg^-1) groups could lengthen the latency of avoiding darkness experiments, significantly shorten the numbers of errors both in avoiding darkness experiment and in Y maze experiment, and reduce the contents of S100B ,TNF-??, MDA and NO, increase the content of IL-10 in the brain of mice (P<0.05 or P<0.01). CONCLUSION Pilose antler peptide could significantly perfect the learning and memory ability of mice exposed to microwave radiation. The mechanism may be related to its anti-oxidative actions by anti-inflammatory action , further lowering neurotoxic effects of NO.     

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??OBJECTIVE To investigate the antitumor effect and molecular mechanism of ginsenoside Rg1 pyrolysis products (HPPRg1) on H₂₂ tumor bearing mice. METHODS To establish tumor model of transplanting H₂₂ tumor-bearing mice and observe the anti-tumor effects of HPPRg1, H₂₂ tumor-bearing mice were randomly divided into groups of control, model, cyclophosphamide (CTX, 30 mg??kg^-1), low dosage of HPPRg1 (HPPRg1-L, 10 mg??kg^-1), middle dosage of HPPRg1 (HPPRg1-H, 20 mg??kg^-1) and high dosage of HPPRg1 (HPPRg1-H, 40 mg??kg^-1) groups, respectively. Through evaluating inhibition rates of tumors, organ indices, and levels of TNF-??, IFN-?? and IL-2 to observe the anti-tumor effect of HPPRg1. In addition, H&E and Hoechst 33258 straining were used to observe the apoptosis of H₂₂ tumor cell. RESULTS Compared with the model group, the three dose groups of HPPRg1 can inhibit tumor proliferation. Mainly through the inhibition of tumor cell proliferation and pro-apoptosis to exert anti-tumor effect. CONCLUSION HPPRg1 has a significantly inhibitory effect on H₂₂ tumor-bearing mice, the mechanism may related to promote apoptosis of tumor cells and improve immunity.     

紫杉醇棕榈酸酯白蛋白纳米粒的制备及药效和骨髓抑制毒性评价

目的 制备紫杉醇棕榈酸酯白蛋白纳米粒(Nab-PTX-PA)冻干粉,对其抑瘤效果和骨髓抑制毒性进行评价。方法 采用纳米颗粒白蛋白结合技术(Nab^TM技术)制备Nab-PTX-PA冻干粉,对Nab-PTX-PA处方的形态、粒径和电位进行表征并比较Nab-PTX-PA冻干前和冻干复溶后粒径、电位的变化。通过构建4T1荷瘤小鼠模型,考察Nab-PTX-PA的抗肿瘤活性。荷瘤小鼠药效给药结束后取血进行血常规检测,考察该制剂的骨髓抑制毒性。结果 本研究成功制备了外观平整饱满、生理盐水复溶后再分散性良好的Nab-PTX-PA冻干粉,且制备Nab-PTX-PA冻干粉粒径为(87.63±1.15)nm(n=3),Zeta电位为(-11.7±0.61) mV(n=3),冻干前和复溶后Nab-PTX-PA的粒径、电位均无明显变化。药效学研究结果表明,Nab-PTX-PA(51.16 mg·kg^-1)的抗肿瘤作用高于Abraxane^® (20 mg·kg^-1),且具有统计学意义。骨髓抑制毒性结果表明,Nab-PTX-PA(25.58 mg·kg^-1)对小鼠的骨髓抑制毒性低于等剂量市售药物Abraxane^® ,Nab-PTX-PA(51.16 mg·kg^-1)对小鼠的骨髓抑制毒性与市售药物Abraxane^® (20 mg·kg^-1)相当。结论 采用Nab^TM技术制备的Nab-PTX-PA冻干粉性质稳定,Nab-PTX-PA(25.58 mg·kg^-1)与等剂量的Abraxane^® (20 mg·kg^-1)相比,降低了骨髓抑制毒性,Nab-PTX-PA(51.16 mg·kg^-1)和Abraxane^® (20 mg·kg^-1)毒性相同时,抗肿瘤效果较为明显。     

茯苓多糖提取物调控CYP2E1及NF-κB炎症通路改善小鼠酒精性肝病

建立酒精性肝病(alcoholic liver disease,ALD)模型,研究茯苓多糖(Poria cocos polysaccharides,PCP)提取物对ALD小鼠细胞色素P4502E1(CYP2E1)及核因子κB(NF-κB)炎症信号通路的影响,探讨其对ALD的保护作用及机制。60只SPF级雄性C57BL/6N小鼠随机分为对照组、模型组、阳性药组(联苯双酯200 mg·kg^-1)、茯苓多糖低剂量组(50 mg·kg^-1)、茯苓多糖高剂量组(200 mg·kg^-1),建立Gao-binge模型并给药。观察肝脏形态及病理学变化,计算脏器指数,检测各组小鼠血清中谷丙转氨酶(ALT)、谷草转氨酶(AST)水平,试剂盒分别测定小鼠肝组织中丙二醛(MDA)、超氧化物歧化酶(SOD)含量,ELISA法检测白细胞介素-6(IL-6)、肿瘤坏死因子-α(TNF-α)的水平,免疫荧光染色观察巨噬细胞激活情况,Western blot分析主要代谢酶CYP2E1及Toll样受体4(TLR4)、磷酸化核因子κB p65(p-NF-κB p65)、核因子κB p65(NF-κB p65)蛋白的表达。与模型组相比,PCP给药组可显著改善肝组织病理损伤情况。免疫荧光结果显示,与模型组相比,给药组肝组织炎性巨噬细胞数量减少,并且各给药剂量组ALT、AST、MDA、IL-6、TNF-α的含量显著降低(P<0.05),SOD活性显著升高(P<0.01)。茯苓多糖提取物对小鼠酒精性肝损伤具有保护作用,其机制可能是调控代谢酶CYP2E1的表达和抑制TLR4/NF-κB炎症信号通路,减轻氧化应激和炎症损伤,抑制ALD的发展。     

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??OBJECTIVE To investigate the anti-inflammatory effects of extract of Scutellaria baicalensis Georgi (SGE) and underlying mechanism by using LPS-induced microglial BV2 cells. METHODS MTT assay was used to observe the cell viability. The content of NO in cell supernatant was measured by Griess reagent. The levels of IL-1??, IL-6 and TNF-?? were detected by ELISA kits. The intracellular TLR4 expression was assayed by Western blotting. RESULTS The levels of NO, IL-1??, IL-6 and TNF-?? were significantly increased induced by LPS in the supernatant of BV2 cells (all P<0.01). However, co-treatment with SGE 100 ??g??mL^-1 significantly decreased the production of related inflammatory factors including NO (P<0.01), IL-1??(P<0.01), IL-6 (P<0.01) and TNF-?? (P<0.05). Furthermore, SGE significantly inhibited the TLR4 expression induced by LPS in BV2 cells. CONCLUSION SGE is able to alleviate LPS-induced inflammatory responses in BV2 cells through down-regulation of TLR4 protein expression suggesting that SGE has therapeutic potential for the treatment of neuroinflammatory diseases.