长期低铅染毒对小鼠红细胞免疫功能的影响

分别给予含模酸铅０,０．１,０．３,０．９,２．７,８．１ｇ／ｋｇ的产喂养昆明小鼠连续８周。用补体致敏酵母多糖血凝法测定经８周不同剂量铅暴露后,小鼠的红细胞免疫功能变化情况。结果显示,各剂量铅暴露组小鼠与对对照组小鼠相比,其红细胞免疫功能均有所降低,尤以饲料中铅含量的增加最为显著。提示,长期低铅染毒可损伤小鼠的红细胞免疫功能。     

c-erbB-2DNA在乳癌中的相关性研究

目的　探索 c- erb B- 2在乳癌中的表达及其与流式细胞仪 DNA的相关性。方法　运用免疫组织化学检测 70例乳癌 c- erb B- 2过度表达情况 ,同时行流式细胞仪 DNA检测。结果　 c- erb B- 2过度表达率为 30 %(2 1∶ 70 ) ,其中浸润性癌中 36 .4% (2 0∶ 5 5 ) ,非浸润性癌中 6 .7% (1∶ 15 )。 c- erb B- 2与 ER、PR呈强负相关 (P<0 .0 0 1) ,与 DNA倍体呈正相关 (P=0 .0 2 1) ,与 SPF呈正相关 (P=0 .0 139) ,与年龄、淋巴结状态、肿瘤分期无明显相关性 ,与 PF间无明显相关 (P=0 .0 6 17)。结论　 c- erb B- 2、DNA相关性研究阐释了乳癌的生物学特性 ,为术后辅助治疗提供了重要线索。     

Studies on the antiinflammatory,immunoregulatory, and analgesic actions of melatonin

In order to develop melatonin (MT) as a potential new drug for the treatment of diseases with inflammation, pain, and abnormal immune responses, the effects and mechanisms of MT on inflammation, immunoregulation, and nociception were studied systematically. MT (40–160 mg/kg, ip) had significant analgesic effects in the hot-plate, writhing, and tail-flick models, with a marked dose- and time-dependence. The onset of its analgesia about 30–60 min after ip, was slower than that of pethidine, but the duration was longer (about 1.5–2 h). The analgesia was also induced by icv MT (0.25 mg/kg) injection. A lower dose of MT (10 mg/kg) could enhance the analgesic effect of pethidine, which was blocked by naloxone (10 mg/kg). MT (100 mg/kg, ip) decreased the content of beta-endorphin in the hypothalamus and pituitary. The analgesia of MT could be attenuated by pretreatment with reserpine (30 mg/kg, ip) or phentolamine (10 mg/kg, ip). CaCl₂ (230 mg/kg) could antagonize the analgesia of MT. EGTA and verapamil had opposite effects to CaCl₂. No tolerance and dependence to MT was found in mice. Further studies showed that MT could enhance the functions of T and B lymphocytes and macrophages in vitro and in adjuvant arthritis, and inhibit the disturbance of immune cells. MT could inhibit the swelling of hindpaw induced by carrageenin and complete Freund's adjuvant. These factors suggest that MT possesses marked antiinflammatory, immunoregulatory, and analgesic effects which may be related to the system of opiate, monoamine, and Ca²⁺ modulation. Drug Dev. Res. 39:167–173. © 1997 Wiley-Liss, Inc.     

Refractive Status and Amblyopia Risk Factors in Chinese Children with Autism Spectrum Disorder

Amblyopia risk factors in children with autism spectrum disorders (ASD) are usually hard to detect in early childhood due to poor cooperation and has not been reported in the Chinese population. We screened 168 Chinese children with ASD, aged between 3 and 8 years, and 264 age-matched neurotypical children with Spot photoscreener and basic ophthalmologic examinations. Children with ASD were found to have normal refractive status but significantly higher incidence of strabismus (16.1%), compared with control children (1.5%) (p?<?0.01). Most of the cases of strabismus found in children with ASD were classified as esodeviation. Strabismus in children with ASD should be considered more seriously as an amblyopia risk factor by ophthalmologists and other healthcare professionals.     

基于调强放疗的鼻咽癌分期探讨

目的 验证鼻咽癌第7版UICC或AJCC分期,并为其进一步修订提供依据。方法 收集2005—2011年间本院收治的经病理确诊、无远处转移并接受根治性IMRT的初治鼻咽癌患者 323例。根据鼻咽癌第7版UICC或AJCC分期标准进行分期。Kaplan-Meier计算生存率,Logrank法检验差异,Cox模型多因素预后分析。结果 5年样本数为 45例。T₁与T₂期、T₂与T₃期 5年LRFS率相近(P=0.055、P=0.746)。将T₂、T₃和T₄期翼内肌组合并为T₂期,T₄期其他的降期为T₃期,新T分期中T₁、T₂、T₃期LRFS曲线明显分开。N₂与N_3a期、N₂与N_3b期、N_3a与N_3b期 5年DMFS率相近(P=0.272、P=0.063、P=0.810)。多因素分析结果显示颈淋巴结部位是DMFS的唯一影响因素(P=0.037)。将N_3a期中颈淋巴为单侧的降期为N₁期,N_3a期中颈淋巴结为双侧的降期为N₂期,则新N分期中N₀、N₁、N₂、N₃期DMFS曲线分开。Ⅰ与Ⅱ期、Ⅲ与 Ⅳ_a期 5年OS相近(P=0.434、P=0.951)。将T₁N_0-1期作为 Ⅰ_{a期、T2N0-1期作为 Ⅰb期、T1-3N2期和(或) T3N0-1期作为Ⅱ期、T1-3N3期作为Ⅲ期,各期 5年OS曲线明显分开。结论 第7版UICC或AJCC分期仍存在不足,推荐新分期能更好预测预后,但需要更大样本量数据验证。}     

吉非替尼联合西妥昔单抗对人肠癌Lovo细胞作用的研究

目的 通过研究吉非替尼与西妥昔单抗的不同给药方案对人肠癌Lovo细胞的杀伤作用,探讨两药单药或联合使用对肠癌的作用结果。方法 通过PCR扩增后产物直接测序的方法筛选肠癌细胞,以药物联合效应测定方法,评价吉非替尼和西妥昔单抗不同时间、浓度、给药顺序对K-ras基因没有发生突变的肠癌Lovo细胞的抑制作用,流式细胞仪测定最佳方案对Lovo细胞周期分布及凋亡率的影响。结果 证实药物诱导细胞凋亡存在,吉非替尼联合西妥昔单抗对Lovo细胞的抑制作用优于单药的分别作用,而不同浓度、时间、给药顺序没有显著差异(P＞0.05)。结论 吉非替尼与西妥昔单抗联合应用对人肠癌Lovo细胞的增殖存在抑制作用。     

晚期原发性肝癌治疗的研究进展

原发性肝癌位居全球最常见恶性肿瘤的第五位,在癌症相关死亡原因中排名第三位.原发性肝癌治疗方法的选择很大程度上取决于肝脏功能,肿瘤大小,是否存在转移灶和血管侵犯.目前,原发性肝癌的根治方法包括肝切除术和肝移植手术,但是很多患者确诊时已进入晚期,失去了治愈的机会.全身系统性治疗对于晚期原发性肝癌的患者变得尤为重要,其中包括:分子靶向治疗、全身系统性化疗和免疫治疗.本文就近年来晚期原发性肝癌治疗的研究进展作一综述.     

层次分析法在武警部队医院卫勤应急药材保障评价指标体系的应用

 目的 探讨层次分析法在武警部队医院卫勤应急药材保障评价指标体系中的应用。方法 运用层次分析法,在建立递阶层次关系的基础上,通过构建判断矩阵、聘请专家对评价指标的重要性进行打分评判、计算各评价指标的权重并进行判断矩阵的一致性检验,确定武警部队医院卫勤应急药材保障评价指标体系的各级指标权重。结果 根据统计学公式得到武警部队医院卫勤应急药材保障评价指标体系4个一级指标和14个二级指标的最终权重。结论 层次分析法用于武警部队医院卫勤应急药材保障评价指标体系可确定权重系数,且操作实施方便易行,简单实用。     

微小核糖核酸-21对乳腺癌MCF-7细胞反转录富含半胱氨酸蛋白表达的调节研究

目的探讨乳腺癌MCF-7细胞中微小核糖核酸-21(microRNA-21,miR-21)对反转录富含半胱氨酸蛋白(reversion inducing cysteine rich protein with Kazal motifs,RECK)表达的调控作用。方法将miR-21模拟物、miR-21抑制物及模拟物阴性对照、抑制物阴性对照各组瞬时转染到MCF-7细胞中,48 h后通过荧光定量聚合酶链反应检测miR-21在细胞的表达情况,蛋白质印迹法检测转染后RECK表达水平变化。结果细胞转染48 h后,miR-21抑制物组和miR-21模拟物组miR-21的表达分别与转染空白对照组比较差异有统计学意义(P<0.001),转染miR-21抑制物组miR-21的表达明显下降,转染miR-21模拟物组miR-21的表达明显上调;细胞转染miR-21各组后RECK表达差异有统计学意义(P<0.01),miR-21抑制物组相对其阴性对照组,RECK表达明显上升(P<0.001);miR-21模拟物组相对其阴性对照组,RECK表达明显下降(P<0.001)。结论miR-21可以抑制乳腺癌MCF-7细胞RECK表达,可能成为判断乳腺癌患者预后的评价指标及肿瘤治疗的新靶点。     

马尔他布鲁菌感染1例

患者男,47岁。因“发热伴腰痛3个月”入院。患者2011年3月无明显诱因下出现发热,一般下午3～4点钟发热,体温最高39．5℃,夜间体温能自行下降,伴大汗淋漓,同时感腰痛,疼痛不剧烈,平躺后疼痛可缓解,感乏力,伴食欲减退,无明显头痛、皮疹、肌肉酸痛,