天花粉治疗输卵管异位妊娠的效果与分析

目的:探讨输卵管异位妊娠采用天花粉针保守治疗的临床疗效及适应症。方法:为一次性肌注2mg并辅以地塞米松,然后观察其症状体征、血HCG、B超结果的变化情况。结果:通过对28例病例的治疗效果统计分析,对于血HCG低于1500mIU/ml、B超检查提示附件包块<2cm、停经时间<45d者,效果达100%;其余为89%。结论:天花粉治疗输卵管异位妊娠有较好的疗效。     

甲氨蝶呤局部注射治疗剖宫产术后子宫瘢痕妊娠的临床效果分析

目的 研究甲氨蝶呤局部注射治疗剖宫产术后子宫瘢痕妊娠的临床效果.方法 选择2007年1月～2013年12月本院收治的30例子宫瘢痕妊娠患者作为研究对象,依照患者个人意愿将其分为两组,对照组15例采用天花粉宫颈注射进行治疗,实验组15例采用甲氨蝶呤局部注射进行治疗,对比和分析两组的治疗效果.结果 实验组的治愈率为100.00％,对照组的治愈率为40.00％,实验组的临床治疗效果明显优于对照组,差异有统计学意义（P＜0.05）.实验组的HCG下降至正常时间及住院时间均短于对照组,差异有统计学意义（P＜0.05）.结论 甲氨蝶呤局部注射是一种非常有利于治疗剖宫产术后子宫瘢痕妊娠的临床手段,疗效显著,值得临床推广应用.     

Structures of Eukaryotic Ribosomal Stalk Proteins and Its Complex with Trichosanthin,and Their Implications in Recruiting Ribosome-Inactivating Proteins to the Ribosomes

Ribosome-inactivating proteins (RIP) are RNA N-glycosidases that inactivate ribosomes by specifically depurinating a conserved adenine residue at the α-sarcin/ricin loop of 28S rRNA. Recent studies have pointed to the involvement of the C-terminal domain of the eukaryotic stalk proteins in facilitating the toxic action of RIPs. This review highlights how structural studies of eukaryotic stalk proteins provide insights into the recruitment of RIPs to the ribosomes. Since the C-terminal domain of eukaryotic stalk proteins is involved in specific recognition of elongation factors and some eukaryote-specific RIPs (e.g., trichosanthin and ricin), we postulate that these RIPs may have evolved to hijack the translation-factor-recruiting function of ribosomal stalk in reaching their target site of rRNA.     

聚乙二醇化天花粉蛋白注射液中天花粉蛋白的HPLC测定

建立了HPLC法检测聚乙二醇化天花粉蛋白注射液中天花粉蛋白的含量。采用硅胶基TSK-G3000SW凝胶柱，0．02mol／L磷酸二氢钠溶液-0．15mol／L氯化钠溶液-95％乙醇（45：45：10）为流动相，检测波长222nm。天花粉蛋白在5～50μg／ml范围内线性关系良好。平均回收率为100．0％，RSD为1．8％。     

Clinical Analysis of 45 Cases of Caesarean Scar Pregnancy

Objective To summarize the clinical characteristics of caesarean scar pregnancy and to investigate its treatment.
Methods Clinical case records of 45 cases of caesarean scar pregnancy from June 2003 to September 2007 were reviewed. The characteristics and management of cases were analyzed.
Results The women＇s average age was 32.8 ± 5.1 years. All cases had amenorrhoea, and 27 cases had vaginal bleeding from spotting to morderate. Seven cases were misdiagnosed as normal early intrauterine pregnancy or inevitable miscarriage before dilation and curettage（D ＆ C）. In case of massive bleeding, caesarean scar pregnancy was diagnosed after D ＆ C. Bleeding was controlled and uterus was conserved in 6 cases, and 1 case underwent hysterectomy because of uncontrollable bleeding. The remaining 38 cases had ultrasound scan, which indicated scar pregnancy before primary treatment, Eight cases were primarily treated with dilation and curettage, in which only 2 cases had slight bleeding in the operation and no further treatment, Nineteen cases were primarily treated with dilation and curettage after uterine artery embolization, in which 17 cases needed no further treatment and had no complications. The success rate was 89.4% （17/19）. Eleven cases were primarily treated with trichosanthin 1.2 mg intramuscular. No one encountered massive bleeding, but 7 cases of these 11 cases needed extra treatment.
Conclusion Caesarean scar pregnancy must be cautious of especially in cases of inevitable miscarriage. Dilation and curettage followed uterine artery embolization can be used as the primary treatment for caesarean scar pregnancy.     

天花粉蛋白体外诱导HL-60细胞凋亡的实验研究

目的:本研究探讨天花蛋白(Trichosanthin,TCS)对HL-60细胞凋亡的影响。方法:采用MTT比色法测定细胞的增殖抑制率;光学显微镜、DNA凝胶电泳、流式细胞仪检测细胞凋亡。结果:TCS抑制HL-60细胞的增殖,促进其凋亡,随作用时间的延长、TCS浓度的增加,增殖抑制及促凋亡作用更加明显。结论:TCS对HL-60细胞有时间和剂量依赖性的细胞凋亡诱导效应。     

天花粉蛋白体外抗人白血病和淋巴瘤细胞的作用机制

本研究的目的是探讨天花粉蛋白（TCS）对人白血病和淋巴瘤细胞系的杀伤作用机制。用台盼蓝染色法检测TCS对细胞生长的影响,应用流式细胞术检测TCS诱导细胞凋亡的情况及对细胞生长周期的影响。结果表明：12.5μg/ml浓度的TCS可以显著抑制各种白血病细胞系的增殖,但对T淋巴细胞系和巨噬细胞细胞系表现为诱导细胞凋亡的作用,而对B淋巴瘤细胞系则表现为生长抑制效应。通过细胞周期检测发现,TCS可以将B淋巴瘤细胞系细胞阻滞在S期,从而抑制细胞增殖,但对T淋巴细胞系则无明显影响。结论：TCS以不同的作用机制杀伤白血病细胞,根据不同的细胞类型分别表现为诱导细胞凋亡和阻滞细胞生长周期的作用。     

Active site of trichosanthin acting as a ribosome-inactivating protein

天花粉蛋白核糖体灭活活性部位的定位方法：羟胺特异裂解天花粉蛋白唯一ＡｓｎＧｌｙ肽键．制备性凝胶电泳获ＨＡＴｆ１和ＨＡＴｆ２二片段．免疫印迹确定天花粉蛋白上不同表位并筛选抗体．兔网织红无细胞系统测定天花粉蛋白及片段对蛋白合成的抑制活性．结果：ＨＡＴｆ１和ＨＡＴｆ２纯度各达９６６％和８０５％．ＨＡＴｆ１保留完整天花粉蛋白的抑制活性．第１４号和第１６号抗天花粉蛋白单抗与二片段显示不同免疫反应性，并用于封闭试验．第１４号单抗能封闭天花粉蛋白及ＨＡＴｆ１活性，而第１６号单抗则否．结论：天花粉蛋白抑制蛋白质生物合成的活性部位位于ＨＡＴｆ１侧，近二部分交界．     

抗人肺腺癌单克隆抗体—天花粉蛋白新型免疫毒素的制备及体外抗肿瘤活性研究

应用异型双功能连接剂ＳＰＤＰ将抗人肺腺癌单克隆抗体ＣＭＵ１５Ａ与天花粉蛋白（ＴＣＳ）交联，制备出新型免疫毒素。应用的ＭＴＴ法检测其对人肺腺癌细胞系ＡＧＺＹ—８３Ａ的选择性杀伤活性。结果表明，ＣＭＵ１５Ａ—ＴＣＳ结合物具有高效靶向杀伤肺腺癌细胞能力，优于游离ＴＣＳ及单抗与ＴＣＳ混合物；与对非靶细胞的细胞毒作用相比较差异非常显著。提示该结合物是一种很有价值的免疫治疗剂，为今后的实验和临床应用提供了资料。     

天花粉蛋白对宫颈癌Caski细胞DNMT1基因的表达和酶活性的影响

目的研究天花粉蛋白(trichosanthin,TCS)对宫颈癌Caski细胞DNMT1基因的表达和酶活性的影响,并探讨天花粉蛋白抗宫颈癌及去甲基化机制,寻找新型去甲基化药物。方法应用RT-PCR、实时荧光定量PCR和Western免疫印迹分析检测天花粉蛋白对宫颈癌Caski细胞DNMTI基因表达的影响;应用DNMT1酶活性试剂盒检测天花粉蛋白对DNMT1酶活性的影响。结果经天花粉蛋白处理后,Caski细胞中DNM1基因mRNA及蛋白表达水平降低,体外酶活性分析发现,TCS对DNMT1酶活性有直接抑制作用。结论天花粉蛋白去甲基化的作用可能是通过抑制DNMTs的活性而实现的;天花粉蛋白有可能是新型的DNMTs抑制剂,具有潜在的临床应用价值。