海藻糖对生物人工肝用人永生化肝细胞系C3A细胞低温的保存

背景：随着生物人工肝在临床上的应用,需要有一种方便、有效、实用的保护生物反应器装载细胞活力及功能的方法,设计有自主知识产权的生物人工肝用肝细胞的低温保护液迫在眉梢。 目的：验证海藻糖作为低温保护剂在4 ℃低温保存肝细胞的作用。 方法：采用C3A人永生化肝细胞系在不同低温保存液(DMEM培养液,乳酸钠林格氏液,加有不同浓度海藻糖的乳酸钠林格氏液,UW液)4 ℃保存24,48,72 h。复苏后行细胞活力、细胞损伤指标、氧自由基代谢相关指标等检测,并通过荧光双染法观察细胞凋亡情况。 结果与结论：不同低温保存液保存不同时间C3A细胞的活力、细胞损伤及细胞凋亡表现均有所不同,其中同时间点不同浓度海藻糖组均优于单用乳酸钠林格氏液组,但不如UW液组(P < 0.01)。而保存24 h的不同浓度海藻糖组及UW液组与乳酸钠林格氏液组相比差异无显著性意义(P > 0.05),提示海藻糖能有效减轻低温对肝细胞凋亡及缺血再灌注损伤的程度,可成为低温保存液中有效及重要的保护剂组分。     

三维成像辅助支持钢板置入内固定治疗胫骨平台骨折

背景：复杂的关节内骨折二维成像不能准确反应损伤特点,依靠三维成像从三维空间清楚准确地观察骨折移位情况,从而能有效指导成功实施骨折内固定。 目的：观察三维C臂术中三维成像辅助支持钢板内固定治疗胫骨平台骨折的临床疗效。 方法：23例胫骨平台骨折患者实施了骨折切开复位支持钢板内固定术,术中三维C臂X光机扫描三维成像监视骨折复位及钢板螺钉位置。观察骨折复位、螺钉位置、切口愈合情况及有无并发症发生。膝关节功能评定采用Rasmussen评分标准。 结果与结论：胫骨平台骨折一次性解剖复位17例,再次复位6例;螺钉位置良好11例,再次调整螺钉位置12例。18例随访3个月,膝关节功能恢复参照Rasmussen评分, 优9例,良8例,可1例,优良率94%。提示胫骨平台骨折术中三维成像监视能实时细微地从冠状面矢状面横断面3个断层切面及立体三维重建了解骨折复位及内固定情况,有效提高了骨折解剖复位和内固定位置正确性,为膝关节功能恢复提供了良好的基础条件。     

Structure-activity relationships in the acronycine and benzo[b]acronycine series: role of the pyran ring

In order to explore the structure-activity relationships in the acronycine series, simplified analogues of cis-1,2-diacetoxy-1,2-dihydroacronycine and cis-1,2-diacetoxy-1,2-dihydrobenzo[b]acronycine (S23906-1, under clinical trials) lacking the fused pyran ring, but possessing an acetoxymethyl leaving group at position 4 were prepared. These new analogues only displayed marginal antiproliferative activity compared to the parent compounds. The presence of the angularly fused dimethylpyran ring appears as an indispensable structural requirement to observe significant cytotoxic activity in this series.     

Two cases of pancreatic cancer with fairly good prognosis

We report two cases of advanced pancreatic cancer whose prognoses are fairly good with surgery and chemotherapy. Case 1: A 71-year-old male patient was diagnosed as pancreatic head cancer by abdominal ultrasound. The tumor size was about 2 cm in diameter. Whipple's procedure and regional lymphadenectomy were conducted. Pathological diagnosis was pT3N2 with s0 and rp1. Gemcitabine (GEM) was administered in a routine fashion at out-patient clinic. He is free of disease after three years and eight months. Case 2: A 63-year-old male patient was diagnosed as pancreatic head cancer although the mass was not so clearly visible by CT. Pylorus preserving pancreaticoduodenectomy was performed with D2 lymph node dissection. Pathological report was pT3N1 with s0 and rp0. GEM was started six months after the operation but continued for only six months. After the non-treatment interval of six months, GEM was restarted due to the sudden elevation of CA19-9. Soon the number dropped but instead of reaching normal range, it began to increase again. S-1 was added to the regimen which gave a great response. He is well after three and a half years. CA19-9 was almost being normal. Both patients had cancer within the pancreas without an invasion to the surrounding tissue. GEM is a standard regimen for adjuvant chemotherapy. However, S-1 may contribute to the outcome when GEM becomes powerless.     

A case of ruptured hepatocellular carcinoma originated from nonalcoholic steatohepatitis (NASH)

A 69-year-old woman visited our emergency room because of sudden right lower quadrant abdominal pain. Abdominal CT revealed a ruptured tumor in the anterior segment of the liver. Emergency laparotomy was selected due to interventional radiology was not available. As the patient was in shock status with massive intraabdominal hemorrhage, ligation of the right hepatic artery and suturing of the tumor bleeding point was carried out. Given the patient's history and liver biopsy report, we concluded as hepatocellular carcinoma derived form NASH. Anterior resection of the liver was performed after the patient became stable. About one year later, tumor was detected in the lateral segment and was removed. The patient is free of disease for two and a half years after the initial operation. Carcinogenesis of the hepatocellular carcinoma within NASH is not well described. We herein report a case of ruptured hepatocellular carcinoma originated from NASH.     

鼻咽癌细胞株中C-KIT表达和突变以及对Imatinib的反应性

背景与目的:我们先前报道了鼻咽癌组织中存在C-KIT表达和突变,但体外水平Imatinib是否对鼻咽癌细胞有增殖抑制作用及其机制尚不清楚。本研究评价了鼻咽癌细胞株中C-KIT表达和突变以及对Imatinib的反应性,探讨三者之间的相关性。方法:应用Western blot检测鼻咽癌细胞株CNE-1、CNE-2、Hone-1、C-666、SUNE-1、5-8F及鼻咽上皮细胞株NP-69的C-KIT表达情况,应用直接测序法检测CNE-1、CNE-2、Hone-1、C-666、SUNE-1、5-8F、NP-69的C-KIT基因突变情况,应用CCK-8试剂盒进行Imatinib对CNE-1、CNE-2、Hone-1、C-666、SUNE-1及5-8F的增殖抑制实验,应用Pearson相关分析和t检验分析鼻咽癌细胞株中C-KIT表达、突变和对Imatinib的反应性三者之间是否有相关性。结果:鼻咽癌CNE-1、CNE-2、Hone-1、C-666、SUNE-1及5-8F细胞株相对于鼻咽上皮细胞株NP-69存在C-KIT蛋白高表达。CNE-1、CNE-2、Hone-1、NP-69发现杂合IVS17+78T>C,C-666...     

Stratus optical coherence tomography study of filtering blebs after primary trabeculectomy with a fornix‐based conjunctival flap

Purpose: To investigate the relationship between filtering bleb function and Stratus optical coherence tomography (OCT) images. Methods: We studied 72 eyes of 65 consecutive patients who had a fornix‐based conjunctival flap in primary trabeculectomy with mitomycin C (MMC). Filtering blebs with various types of glaucoma were examined using Stratus OCT. Success rates were defined as intraocular pressure (IOP) ≤ 15 mmHg and IOP reduction ≥ 25% without medication or additional surgery. Success rates among classified groups were compared using Kaplan–Meier survival curves and the log‐rank test. Results: Blebs were classified into three different categories on the basis of the following Stratus OCT patterns: cystoid type (multiple cysts inside the bleb; 17 eyes), diffuse type (low to high reflective areas that were mixed inside the bleb; 31 eyes) and layer type (medium to high reflective layer inside the bleb; 24 eyes). Success rates in the cystoid‐, diffuse‐ and layer‐type blebs were 94%, 97% and 75% (P = 0.02), respectively. Conclusion: In trabeculectomy with MMC and a fornix‐based conjunctival flap, there is a significant association between the success rates and the postoperative Stratus OCT findings of filtering blebs.     

CD8~+NKT细胞表面活化性受体NKG2D在肺癌患者外周血中的表达及临床意义

背景与目的 NKT细胞活化性受体NKG2D及sMICA是近来肿瘤免疫研究领域的热点之一。本研究旨在观察肺癌患者外周血中CD8+NKT细胞受体NKG2D表达水平的变化,并对NKG2D及sMICA进行相关性分析,探讨它们在肺癌免疫监视中的作用及临床意义。方法选择82例初发未治疗的肺癌患者,采用流式细胞术检测外周血CD8+NKT细胞活化性受体NKG2D的表达,并以45例健康人作对照,采用酶联免疫吸附法检测肺癌患者血清中sMICA的表达,分析NKG2D与肺癌临床生物学特征的关系。结果肺癌患者外周血中CD8+NKT细胞表面活化性受体NKG2D水平均低于对照组,差异有统计学意义(P<0.001)。随TNM分期的增加,NKG2D的表达率逐渐降低。其中IV期肺癌患者NKG2D的表达明显低于I期-II期及III期患者该受体的表达,差异有统计学意义(P<0.001)。肺Ca患者中吸烟人群外周血中CD8+NKT细胞受体NKG2D的表达较非吸烟者低,差异有统计学意义(P<0.05)。CD8+NKT细胞受体NKG2D与sMICA呈负相关(r=-0.598,P<0.001)。结论肺癌患者CD8+NKT细胞表面受体NKG2D在外周血中低表...     

Tuberculosis Acquired Outside of Households, Rural Vietnam

Using population-based data from rural Vietnam, we assessed tuberculosis (TB) transmission within and outside of households. Eighty-three percent of persons with recent household TB were infected by different strains of Mycobacterium tuberculosis than were their household members. This result argues against the effectiveness of active TB case finding among household members.