Clinicopathologic features and survival of patients with colorectal mucinous, signet-ring cell or non-mucinous adenocarcinoma:experience at an institution in southern China

Background Previous studies have shown conflicting results on the relation between clinicopathologic features and prognosis of patients with colorectal mucinous, signet-ring cell, or non-mucinous adenocarcinoma; only few such studies have been performed in China. This retrospective study analyzed data from our department to investigate clinicopathologic characteristics, prognosis and possible correlations of three histologic types -- colorectal mucinous,signet-ring cell, and non-mucinous adenocarcinoma, to clarity the bases for observed differences which may lead to development of targeted therapies Methods Of 2079 patients diagnosed with colorectal cancer between 1994 and 2007, 144 had mucinous, 25 had signet-ring cell, and 1837 had non-mucinous adenocarcinoma. Their clinicopathologic parameters and survival were analyzed using established statistical methodologies.Results Mucinous and signet-ring cell adenocarcinomas were common in younger patients (P <0.001). Location, size and disease stage differed significantly among the three types. Signet-ring cell tumors were more commonly found in the rectum than mucinous and non-mucinous adenocarcinoma (P <0.001). Mucinous and signet-ring cell tumors presented in a later stage in life more often than non-mucinous adenocarcinoma, with lymph node involvement, serosal infiltration, peritoneal dissemination, and adjacent organ invasion (P <0.01). The rate of radical resection, hepatic metastasis and local recurrence did not differ among types (P ＞0.05). Compared with patients with non-mucinous adenocarcinoma, patients with mucinous and signet-ring cell tumors who underwent potentially curative resections or stage Ⅱ/Ⅲ disease had poorer long-term overall survival. Survival did not differ by type for patients with either stage Ⅰor Ⅳ disease (P ＞0.05). Conclusions Mucinous and signet-ring cell adenocarcinoma have unique carcinogenesis and similar biologic behavior.Our study confirms that both histologic types, especially signet-ring cell tumors, are independent, negative prognostic factors for patients with colorectal cancer. Type does not appear to have a significant effect on survival when disease is either stage Ⅰ or Ⅳ at presentation.     

热化疗对人体结肠癌LoVo细胞中一氧化氮含量的影响

Aim To study the effect of nitric oxide (NO) on LoVo cells after hyperthermia combined with MMC and their mechanisms. Methods The levels of NO were determined in cell culture medium of LoVo cells by Cu-Cd reduction method.Results The levels of NO in control (45.9±16.12) μmol/L group were lower than those in chemohyperthermy(92.3±24.30) μmol/L and hyperthermia (67.67±15.48)μmol/L group (P＜0.01,P＜0.05 respectively). Levels of NO in chemohyperthermy and hyperthermia groups were higher than those in chemotherapy(47.03±16.32)μmol/L(P＜0.01,P＜0.05 respcevtively). The levels of NO in chemo-hyperthermy group were higher than those in hyperthermia group(P＜0.05), and those in chemotherapy group higher than in control group but without statistical significance.Conclusion Chemohyperthermy and hyperthermia could remarkably enhance the levels of NO produced by LoVo cells. NO levels could also be enhanced by chemotherapy. It could be concluded that Nitric Oxide Synthase (NOS) in tumor cells might be activated by hyperthermia, chemohyperthermy and chemotherapy, and increased NO level which induced cytotoxic reaction. This may be one of the mechanisms of treatment with chemohyperthermy.     

聚羟基丁酯酯缓释微球的制备及性能

用溶剂蒸发法制备了以新型生物可降解材料聚羟基丁酸酯为载体、以安定为模药的缓释微球,讨论了药物与载体之比对药物含量与包封率的影响,以及制备微球条件对药物释放性能的影响;微球平均粒径为３０～４０μｍ,粒径分布在１～１．５之间,最大载药量为１９．５１％;最高包封率为６７．１１％;体外累积释放曲线呈“两相”释放特征并拌随初始的“突释效应”。扫描电镜观察微球表面呈皱缩表观形态结构,微球内部横断面具有孔道与孔     

一磺酸基酞菁锌和四磺酸基酞菁锌的分离及在水溶液中的 …

目的 分离一磺酸基酞菁锌（ＺｎＰｃＳ）和四磺酸基酞菁锌（ＺｎＰｃＳ４）,并研究这两种配合物在水溶液中伏安行为。方法 采用高效液色谱分离纯化ＺｎＰｃＳ和ＺｎＰｃＳ４,应用三电极系统测定其在水溶液中伏安曲线,测定ＺｎＰｃＳ４在不同ｐＨ值下和红光照射下的循环伏安曲线。结果 在水溶液中（ｐＨ７．０）,这两种配合物均呈现二个不可逆的单电子还原电流峰,峰Ⅰ的峰电位（Ｅｐ）是＋０．１８Ｖ,峰Ⅱ的峰位置（Ｅｐ）－     

肾功能分级在成人心脏术后肾功能衰竭的应用

Objective To evaluate the ability of the RIFLE classification to predict hospital mortality in adult patients who underwent cardiac surgery. Methods From October Ist 2006 to December 31st 2006, five hundred and nine adult patients who underwent coronary artery bypass grafting and/or valve operation were enrolled in this study. Renal function was assessed daily according to the RIFLE classification, meanwhile, APACHE Ⅱ score and SOFA score were also evaluated, as well as the maximum scores were recorded. Results Mean duration of ventilation support was 18(14 - 19) hours, the time of ICU stay was 1.4 ± 1.0 days, and the time of postoperative hospital stay was 12. 0(10.0- 15.0) days. 167 patients (32. 8%) incurred postoperative ARF according to the RIFLE classification. The overall mortality was 4. 3% (22/502). A significant increase (P < 0. 01) was observed for mortality based on RIFLE classification. By applying the area under the receiver operating characteristic curve, the RIFLE classification had more powerful discrimination power [0. 933, (95% CI 0. 872 -0. 995) ,P <0. 001]. Conclusions ARF is one of the major complications in postcardiotomy patients. Analytical data suggested the good discriminative power of the RIFLE classification for predicting inpatient mortality of adult postoperative patient with ARF, and the RIFLE classification is simple and practically performed. According to the RIFLE classification, patients with RIFLE class I or class F incur a significantly increased risk of in-hospital mortality compared with those who never develop ARF.     

冠心病患者冠状动脉内成形及支架术前后QT离散度的变化

目的 体表心电图ＱＴ离散度（ＱＴｄ）增大在冠心病患者是预测室性心律失常事件的有用指标。旨在估价冠心病患者经皮冠状动脉腔内成形主支架术（ＰＴＣＡ＋ｓｔｅｎｔ）前后对ＱＴ离散度的影响。方法 对６０例冠心病患者行ＰＴＣＡ＋ｓｔｅｎｔ术前后ＱＴ离散度进行分析。男性４６例,女性１４例,平均年龄５７岁,患者为单支血管病变３６例,多支血管病２４例。本组对ＰＴＣＡ＋ｓｔｅｎｔ术前后同步３导联的标准１２导联心电图Ｑ     

心脏停搏液pH值对大鼠未成熟心肌的影响

目的　探讨心脏停搏液 p H值对离体未成熟大鼠心肌的影响 .方法　采用 SD幼鼠 (18～ 2 1d)离体工作心模型 ,14℃低温缺血 12 0 min,缺血前分别以 p H为 6 .40 ,7.0 0 ,7.2 5 ,7.40 ,7.80和 8.2 0的 St.Thomas' 液单次灌注 ,观察记录缺血前后心功能的变化及心肌 CPK漏出量 .结果　1缺血再灌注 30 m in后主动脉流量恢复百分比依次为 (6 2±5 ) % ,(72± 4) % ,(83± 4) % ,(78± 3) % ,(70± 3) %和 (5 8±4) % ,以 p H 7.2 5组保护效果最好 .2心肌 CPK漏出量各组间无显著差异 .结论　 p H值为 7.2 5的弱酸性心脏停搏液对大鼠未成熟心肌可提供良好的保护作用 ,同时大鼠未成熟心肌可耐受较大范围的 p H变化 .     

七氟醚和异氟醚心血管效应的比较

目的　比较不同浓度七氟醚和异氟醚的心血管效应 .方法　 2 0只健康杂种犬随机分为七氟醚组和异氟醚组 .监测有创动脉压 ;经大静脉置入漂浮导管测定肺动脉楔压、中心静脉压、心输出量 .吸入麻醉药 (七氟醚或异氟醚 ) ,维持其呼气末浓度在 14.5 m L· L- 1 或 8.5 m L· L- 1 ,10 min后测定上述参数值 .结果　七氟醚和异氟醚 :1对心率均没有显著影响 ;2均可呈剂量依赖性地降低体循环血压和血管阻力 ,对心功能也有剂量依赖性的抑制作用 ,两药之间的差异没有显著性 ;3七氟醚降低肺动脉压的作用强于异氟醚 ,但与浓度大小无明显关系 .结论　七氟醚和异氟醚具有相似的心血管效应 ,除七氟醚降低肺动脉压的作用强于异氟醚外 ,二药对心血管系统功能均有剂量依赖性的抑制作用 .     

综合4步法治疗肩周炎208例报告

采用局部注射 ,针刀松解 ,手法剥离 ,中药调理 4步法有机结合治疗肩周炎 2 0 8例 ,结果治愈 187例 ,显效 13例 ,优良率 96.3 %。认为针对局部病变及肩部整体功能调理 ,是获得较好疗效的关键。     

恶性纤维组织细胞瘤的免疫组织化学研究

本文对23例恶性纤维组织细胞瘤((MFH)及19例其他软组织肿瘤的免疫组化研究表明,AACT,AAT阳性率最高,是肿瘤性组织细胞的良好标志物,对MFH有一定诊断价值。Lys不是恶性组织细胞的良好标志物。Des的表达提示部分肿瘤细胞向肌纤维母细胞分化,Vim的表达则提示向纤维母细胞分化。所以,我们的研究结果表明MFH可能来自未分化间叶细胞,并在不同情况下向组织细胞、纤维母细胞和肌纤维母细胞等不同方向分化,而表现出复杂的组织学形态。