简介:目的:研究徐长卿(CynanchumpaniculatumBge.)中C21甾体化学成分.方法:应用多种色谱柱层析法对徐长卿的乙酸乙酯部位进行化学成分的分离,并通过波谱技术鉴定化合物的结构,结果:分离鉴定了7个C21甾体化合物,分别为3β,14-dihydroxy-14β-pregn-5-en-20-one(Ⅰ),glaucogeninC(Ⅱ),glaucogeninA(Ⅲ),glaucogeninD(Ⅳ),neocynapanogeninF(Ⅴ),glaucogeninC3-O-β-D-thevetoside(Ⅵ),neoeynapanogeninF3-O-β-D-oleandropyranoside(Ⅶ).结论:化合物Ⅲ、Ⅳ、Ⅵ为首次从该植物中分离得到.
简介:二新C-21steroidalglycosides,mucronatosidesM(1)和N(2),从白前科植物mucronata的茎被孤立,和一已知的复合stephanosideM(3)。根据化学证据和广泛的分光镜的方法,包括一个维、二维的NMR,二新混合物的结构作为12-O-tigloyl-20-O-N-methylanthraniloylsarcostin3-O--D-glucopyranosyl-(14)被识别-6-deoxy-3-O-methyl--D-allopyranosyl-(14)-(-D-cymaropyranosyl-(14)--D-cymaropyranoside(1),和12-O-cinnamoyl-20-O-nicotinoyl(20S)-pregn-6-ene-3(,5(,8,12,14(,17,20-heptanol3-O--D-glucopyranosyl-(14)-6-deoxy-3-O-methyl--D-allopyranosyl-(14)--D-cymaropy
简介:c-ras-P21andGamma-glutamyltransferase(G-GT)activityanditsisoenzymesinratliverextractsweremeasuredafterpartialhepatectomy.TherewereG-GTactivitypeaksat12thand36thhourafteroperation,whilenodistinctisoenzymepatternswerefound.P21proteinexpressionoccurredbetween48and96hoursafterpartialhepatectomy.TheseresultssuggestthatthetemporaryincreaseofG-GTandP21proteinlevelisinvolvedintheprereplica-tivestageofliverregeneration.
简介:摘要一例27岁男性患者,因肢体震颤3年就诊,诊断Kufor-Rakeb综合征(KRS),对多巴胺反应可。其基因检测提示ATP13A2基因存在2个新的突变,分别是28号外显子(exon)c.3367C>G(p.Leu1123Val)突变及21号外显子c.2278G>A(p.Val760Met)突变。
简介:BackgroundH9c2celllineismononucleatedmyoblastderivedfromembryonicrathearttissue.ActivitiesofTGF-β1,MMP-2andMMP-9increaseinH9c2cellsaftertreatmentwithfibrosisstimuli.MicroRNA(miRNA),akindofendogenoussmallnon-codingRNA,participatesincardiacfibrosis.Inthepresentstudy,expressionsoffibrosis-relatedgenesandmicroRNAsinTGF-β1treatedH9c2cellswereinvestigated.MethodsExpressionsoffibrosis-associatedgenes,includingCol3a1,α-SMA,FN1,CTGFandTSP-1,weremeasuredinTGF-β1treatedH9c2cellsbyquantitativereversetranscriptionandPCR(qRTPCR).Levelofα-SMAinH9c2cellswasdemonstratedbyfluorescenceimmunohistochemistry(FIHC)assay.ExpressionsofmaturemiR-16,-21a,-29binH9c2cellsweredeterminedbyqRT-PCRassay.ActivationsofSmad3andNF-kBsignalinginTGF-β1-treatedH9c2cellswerestudiedbydualluciferaseassay.ExpressionsofCol3a1,α-SMA,FN1,CTGFandTSP-1weredetectedinH9c2cellswithadenovirus-mediatedoverexpressionofmiR-21a.ResultsqRT-PCRassayshowedthatα-SMA,FN1,CTGF,TSP-1,butnotCol3a1,wereup-regulatedinTGF-β1treatedH9c2cells.FIHCresultalsorevealedthatα-SMAwasincreasedinTGF-β1-treatedH9c2cells.Consistently,dualluciferaseassayshowedthatSmad3andNF-kBsignalingproteinswereactivatedinTGF-β1-treatedH9c2cells.miR-21a,butnotmiR-16and-29b,wassignificantlyup-regulated.Additionally,over-expressionofmiR-21asignificantlyincreasesmRNAexpressionsofα-SMA,FN1,CTGFandTSP-1inH9c2cells.ConclusionsMiR-21aisup-regulatedinTGF-β1treatedH9c2cells,andmaycontributetoup-regulationsoffibrosis-associatedgenes.
简介:C2C的模式在中国完成了培养用户网络购物习惯的使命,而最终要盈利却不得不绕道B2C。4月17日,易趣网副总裁常琳的晚餐时间是和易趣新平台上的个人大卖家们一起度过的。席间,那些自eBay易趣时代就栖身此处的大卖家们不断地向常琳提出各种吸引卖家进驻的建议。
简介:2015年4月25日,尼泊尔博卡拉8.1级地震发生后,位于中尼边境的西藏自治区日喀则市吉隆县吉隆口岸成为一座名副其实的'生命孤岛'。丁在成是西藏公安边防总队吉隆边检站监护中队的排长。地震突发,口岸的人们慌乱奔跑,喊声、哭声混成一片,周围山体的滑坡、滚石伴着浓烟倾泻而下。他与20名战友第一时间投入救援,多次深入尼泊尔边境实施跨境救援。当口岸所有群众和工作人员在被转移