Prognostic significance of tumor necrosis in ovarian cancer patients treated with neoadjuvant chemotherapy and interval surgical debulking

The objective of this study was to study the significance of tumor necrosis documented at the time of interval surgical debulking after neoadjuvant chemotherapy. Retrospective chart reviews were carried out from 1997 to 2005 to identify ovarian cancer patients treated with neoadjuvant chemotherapy. Patients' demographics together with disease characteristics, treatment-related variables, and outcomes were recorded. Cox proportional hazard models were built to model time to progression using predictor variables such as age, cancer stage, tumor grade, residual disease, percentage change in CA125 level from baseline, and degree of necrosis in resected tumor specimens. One hundred one patients were included in the study. Optimal debulking was achieved in 74% of the patients. Cox regressions revealed three significant predictive variables of time to first progression: younger age (hazard ratio [HR] = 0.95, 95% CI 0.92-0.98, P= 0.004), residual disease (P= 0.048), and the absence/minimal tumor necrosis after three cycles of neoadjuvant chemotherapy (HR = 1.97, 95% CI 1.01-3.87, P= 0.048). The estimated median survival was 50.66 months (95% CI 46.12-55.20). The lack of or minimal tumor necrosis after neoadjuvant chemotherapy is an independent risk factor for recurrent disease.     

离子液体促进氟罗沙星的合成

2,3,4-三氟苯胺经与EMME缩合、环合、氟乙基化、与N-甲基哌嗪缩合和水解反应制得氟罗沙星,前4步反应可被离子溶剂1-丁基-3-甲基咪唑六氟磷酸盐促进,如环合反应温度由300℃降至200℃,总收率61%.     

提高化疗强度对伴IKZF1基因缺失儿童急性淋巴细胞白血病预后的影响

目的 总结伴IKZF1基因缺失儿童急性淋巴细胞白血病（ALL）的临床特征并观察提高化疗强度对其预后的影响。方法 2015年12月至2018年2月间确诊并按照中国儿童白血病协作组-ALL 2008（CCLG-ALL 2008）方案规范治疗的ALL患儿共278例,根据有无IKZF1基因缺失将其分为IKZF1基因缺失组和IKZF1基因正常组,IKZF1基因缺失组均接受CCLG-ALL 2008高危（HR）方案治疗,IKZF1基因正常组则按临床危险度分型接受不同强度化疗,比较两组的临床特征及无事件生存（EFS）率。结果 278例患儿中共24例（8.6%）检出IKZF1基因外显子大片段缺失。IKZF1基因缺失组初诊时WBC ≥ 50×10⁹/L、BCR-ABL1融合基因阳性、诱导缓解治疗第15天微小残留病≥ 10%、微小残留病-HR、临床危险度-HR所占比例均高于IKZF1基因正常组（P < 0.05）。IKZF1基因缺失组3年EFS率（76%±10%）低于IKZF1基因正常组（84%±4%）,但差异无统计学意义（P=0.282）;其中,IKZF1基因缺失组-非HR（实际按CCLG-ALL 2008 HR方案化疗）的预计3年EFS率为82%±12%,低于IKZF1基因正常组-非HR（86%±5%）,但差异无统计学意义（P=0.436）。结论 伴IKZF1基因缺失的儿童ALL早期治疗反应更差,提高化疗强度可能改善其预后。     

中药蛋白质组学研究策略

蛋白质组学在中药研究中的应用已十分广泛,有许多较为成功的实例。作者回顾了前人应用蛋白质组学技术对中药复杂体系的研究工作,并提出建立一门专门针对中药研究的蛋白组学,即中药蛋白质组学。该文对中药蛋白质组学的研究策略及未来的研究方向进行了综述和思考,希望为从事中药蛋白质组学研究者提供一点思路。     

针灸对MNNG诱导大鼠癌前病变胃黏膜病理及血清CEA影响观察

目的：研究针灸预处理对Wistar大鼠癌前病变胃黏膜干预作用和对血清CEA的影响。方法：将50只Wistar雄性大鼠随机分为4组,其中空白对照组10只;其余40只大鼠自由饮用100gg／mL的N-甲基-N’-硝基-N-亚硝基胍（MNNG）6个月诱发大鼠胃癌模型,模型组20只;艾灸组和针刺组均10只,在造模3个月以后对足三里和梁门穴进行相应的治疗干预。处死大鼠后取胃黏膜进行HE染色,光镜下观察各组大鼠胃黏膜形态,并采用IPP6．0图像分析软件比较各组胃黏膜细胞核质比。股动脉留取大鼠血液,ELlSA法检测血清CEA。结果：光镜结果显示,艾灸和针刺预处理组大鼠胃黏膜相对于模型组大鼠炎症和异型性等变化较轻;模型组核质（面积）比为1．51±0．69,明显高于空白对照组0．85±0．33,P〈0．001;艾灸组为0．70±0．29,小于模型组,P-0．0064;针刺组为0．99±0．43,亦小于模型组,P=0．0400。酶联免疫吸附实验（enzyme—linked immuno sorbent assay,ELISA）结果显示,模型组血清CEA为（372．42±137．61）og／mL,较空白组（243．13±59．07）iog／mL升高,P-0．0072;艾灸组为（285．63±122．14）pg／mL,较模型组降低,P=0．0445;针刺组为（302．89±ll0．02）pg／mL,较模型组降低,但差异无统计学意义,P=0．4020。结论：针灸预处理能够改善MNNG导致的大鼠胃黏膜癌前病变的组织学表现和降低血清CEA浓度。     

磁性二氧化硅纳米微球对人源脐带间充质干细胞活性的影响

目的 探究磁性二氧化硅纳米微球作为一种干细胞表面的潜在标记物,对人脐带间充质干细胞(umbilical cord mesenchymal stem cells,UCMSCs)的表面干性标志物表达、细胞增殖和迁移能力等生物学活性的影响.方法 先采用溶剂热法和St?ber方法制备一种生物相容性高的磁性二氧化硅纳米微球,再通...     

慢性乙型肝炎患者肝再生酶变化与肝纤维化的相关研究

目的 探讨慢性乙型肝炎（下称乙肝）患者血清中β-N-乙酰氨基葡萄糖苷酶（NAG）、单胺氧化酶（MAO）、胆碱酯酶（CHE）的活性变化与肝纤维化的相关性。方法 采用速率法对健康对照组和慢性乙肝疾病组的NAG、MAO、CHE活性进行测定,应用肝穿刺活检对慢性乙肝患者肝组织的纤维化活动度进行观测。结果 慢性乙肝组各种酶的活性与健康对照组比较,差异有统计学意义（P〈0．01）。NAG、MAO与肝纤维化程度呈正相关,CHE与肝纤维化程度呈负相关。结论 NAG、MAO、CHE与肝纤维化程度相关性显著,可以作为检测肝纤维化程度的良好指标。     

蕲蛇抗栓酶注射液稳定性的研究

为获取对蕲蛇抗栓酶(acutobin)注射液的酶活有保护作用且使制剂稳定的保护剂配方，本实验设计了7个单方及四组正交实验共16个保护剂处方．以加入保护剂的蕲蛇抗栓酶为样品，未加保护剂的为空白对照．在37℃温度加速实验下，间隔一定时间观测蕲蛇抗栓酶制剂的酶活及澄明度的变化。结果，单方氨基酸和小肽类的加入使酶活力保存率提高，而多元醇类的加入使澄明度得到改善；复方保护剂的加入对蕲蛇抗栓酶的保护作用不明显。     

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??OBJECTIVE To investigate the influencing mechanism of the particle size of hydroxypropyl methylcellulose (HPMC) on the release behavior of nifedipine from a sustained-release tablet system based on the compaction properties of HPMC. METHODS The compaction properties of HPMC K4M of different particle sizes were determined. Hydrophilic matrix sustained-release tablets were prepared using nifedipine as the active ingredient and HPMC K4M as a hydrophilic matrix former. The effect of compaction properties of HPMC K4M on the porosity, release, and other properties of nifedipine hydrophilic matrix sustained-release tablets were also studied. RESULTS The decrease of the particle size of HPMC K4M resulted in higher bulk density, tap density, compressibility index, and tensile strength and smaller elastic recovery of HPMC K4M, which all led to the decrease of thickness and porosity and the increase of HPMC concentration per unit volume of nifedipine hydrophilic matrix sustained-release tablets. These factors resulted in faster gelation rate of nifedipine sustained-release tablets and decreased water ingress and polymer swelling, so the release of nifedipine from the delivery system was prolonged. CONCLUSION The obviously different compaction properties of HPMC of different particle sizes influence the porosity and gelation rate and then the release of hydrophilic matrix nifedipine sustained-release tablets.     

桂枝饮片标准汤剂质量标准研究

目的制备桂枝饮片标准汤剂,并进行质量标准研究。方法依照标准汤剂的制备要求,制备15批桂枝饮片标准汤剂,以肉桂酸作为定量检测指标,计算转移率与出膏率,并建立其HPLC指纹图谱分析方法。结果通过对15批桂枝标准汤剂进行测定,肉桂酸转移率为56.93%~94.06%,出膏率为3.30%~9.40%;并用中药色谱指纹图谱相似度评价系统(2012A)软件进行指纹图谱分析,标定了9个共有峰,确认4个,分别为原茶儿酸(1号峰)、香豆素(4号峰)、肉桂酸(6号峰)、桂皮醛(7号峰)。对15批桂枝饮片标准汤剂分别进行了相似度评价,其相似度均高于0.95。结论建立了桂枝饮片标准汤剂指纹图谱,该方法精密度、稳定性和重复性良好,具有一定的鉴别意义,可为桂枝配方颗粒的质量控制提供参考。