Myoepitheliomas of the soft palate: helical CT findings in two patients.

We describe the enhancement patterns of myoepithelioma in two patients with a soft palate mass. In the first case, helical CT revealed a faintly enhancing mass. Histologically, the tumor was composed of plasmacytoid cells in a background of rich myxoid stroma. Immunostaining for CD34 showed scanty blood vessels. In the second case, helical CT revealed an intensely enhancing mass. Histologically, the mass was a cellular tumor with fibrous stroma. Immunostaining for CD34 also showed frequent blood vessels.     

嗜铬细胞瘤患者围手术期处理的改进

目的：探讨提高嗜铬细胞瘤患者围手术期安全性的措施。方法：对15例嗜铬细胞瘤患者、术前采用选择性α1受体阻滞剂多沙唑嗪控释片(可多华)控制高血压；11例患者采用3D DCEMRA进行肿瘤定位；术中均采用联合高容量血液稀释(AHH)和术中患者自体血回输纠正血容量。结果：除1例持续性高血压患者需联合钙离子拮抗剂和ACEI药物降压外．其余患者血压控制均为满意；根据3D DCEMRA定位选择手术径路者均顺利完成手术；AHH联合术中自体血回输使14例患者避免了异体输血。结论：本文围手术期处理改进．可多华可明显减少药物的不良反应；采用3D DCEMRA进行肿瘤定位，可增加手术安全性；AHH联合术中自体血回输可减少医疗成本和异体输血，以及由此而引起的并发症。     

磁疗及特定电磁波促进小儿肺功能恢复78例

Background: Under magnetic field,magnetic therapy can enhance resistance of biological individual,regulate qi and blood,improve local blood circulation and tissue permeability,promote absorption and removal of exudates,strengthen non specific immunity,activate phagocytosis ability of white cells and hence resist inflammation.TDP affect blood dynamics and thereby improving local blood circulation and metabolism and tissue regeneration,tissue nutrition,enhance immune function,promote tissue and cell metabolism and repair through its thermal effect.     

双特异抗体介导的人单核—巨噬细胞对荷人肝癌裸鼠的抑制作用

观察双特异性单克隆抗体介导的人单核－巨噬细胞在裸鼠体内对肝癌生长的抑制作用。用化学交联法制备双特异性单克隆抗体ＨＡｂ１８－ＭＡｂ７及ＨＡｂ１８Ｆ（ａｂ）２－ＭＡｂ７Ｆ（ａｂ＇＿２，并将其与单核－巨噬细胞－同注入荷人肝癌裸鼠体内，观察肿瘤体积的变化。     

Obesity in youth and middle age and risk of colorectal cancer in men

To investigate an association between colon cancer and obesity during early adulthood—a potentially important period in the etiology of this disease—the authors assembled, by computer linkage, a population-based historical cohort of 52,539 men born between 1913 and 1927 residing in Hawaii (USA), for whom weight and height had been recorded in 1942–43 and 1972. Linkage of this cohort to the Hawaii Tumor Registry resulted in the identification of 737 incident cases of colorectal cancer for 1972–86. An average of 3.8 cancer-free controls were matched to each case on month and year of birth and ethnicity of the parents. A case-control analysis in each anatomic subsite of the large bowel revealed that both early and middle-age body mass increased the risk of sigmoid cancer in men in a dose-dependent fashion. The odds ratios (OR) for sigmoid cancer for the highest compared with the lowest tertiles of Quetelet index were: 2.1 (95 percent confidence interval [CI]=1.4–3.2) and 1.7 (CI=1.1–2.5), at ages 15–29 and in prediagnostic years, respectively. These associations were additive and idependent of socioeconomic status. Men who were above the median Quetelet index in 1942 and 1972 had an OR of 2.7 (CI=1.8–4.0), compared with those who were below the median in both periods. This study provides further evidence for an association of obesity with colon cancer in men and suggests that this association is limited to the sigmoid colon and may be related to both early and late events of colon carcinogenesis.The authors are with the Epidemiology Program, Cancer Research Center of Hawaii, University of Hawaii. Address correspondence to Dr Le Marchand, Epidemiology Program, Cancer Research Center of Hawaii, 1236 Lauhala Street, Suite 407, Honolulu, HI 96813, USA. This work was supported in part by Public Health Service grant 5-R29-CA44503 and contract NO1-CN-55424 from the National Cancer Institute, National Institutes of Health, Department of Health and Human Services.     

泌尿生殖道患者沙眼衣原体和支原体检测及支原体药敏分析

目的　检测皮肤性病门诊泌尿生殖道患者沙眼衣原体 (CT)和支原体感染情况及支原体培养加药敏分析。方法　对5 0 95例泌尿生殖道感染者用金标法检测沙眼衣原体抗原 ,用微量肉汤稀释法检测解脲支原体 (Uu)和人型支原体 (Mh)并进行 8种抗生素的药敏试验。结果　 5 0 95例泌尿生殖道感染者中衣原体阳性 417例 ,总阳性率为 8 2 % ,女性患者阳性率 ( 11 2 % )明显高于男性患者阳性率 ( 6 2 % ) ,有显著性差异 ( χ2 =40 1,P <0 0 1) ;检出支原体 172 8例 ,总阳性率为 3 3 9% ,女性患者阳性率 ( 4 3 0 % )明显高于男性患者阳性率 ( 2 8 0 % ) ,有显著性差异 ( χ2 =114 8,P <0 0 1) ;其中Uu感染 ( 12 5 1例 ,2 4 6% )明显高于Mh感染 ( 71例 ,1 4% )和Uu +Mh混合感染 ( 4 0 6例 ,8 0 % )。Uu对红霉素、罗红霉素、交沙霉素、阿奇霉素、强力霉素、美满霉素、氧氟沙星、环丙沙星的高度敏感率分别为 60 3 %、67 5 %、73 2 %、85 3 %、5 5 7%、40 1%、2 5 6%、2 7%。Uu +Mh混合感染对 8种抗生素均出现不同程度的耐药菌株。结论　湖南地区泌尿生殖道感染患者中 ,衣原体、支原体感染处于国内较高水平。支原体对不同种类抗生素有较高的耐药性 ,特别是Uu +Mh混合感染 ;临床上做支原体培养加药敏试验 ,对指导     

正常人及大鼠心脏内皮素转换酶的分布

目的:了解正常人和大鼠心脏各部分内皮素转换酶(Endothelin-conveerting en-zyme,ECE)的分布。方法:采用半定量RT-PCR法检测ECE mRNA表达,同时根据外源性的巨内皮素-1转变为内皮素-1的量判定ECE活性。结果:正常人心脏各部位心肌均存在ECE,ECEmRNA表达和活性的分布特点一致:心房显著高于心室,左、右心房间及左、右心室和室间隔间无显著性差异。大鼠的ECE mRNA表达和活性分布规律与人相似。结论:正常人和大鼠心脏各组分均存在ECE,且两者的分布规律相似。     

主动脉阻断期间含氧血持续肺动脉灌注的肺保护研究

目的评估体外循环主动脉阻断期间应用含氧血持续肺动脉灌注对肺功能的保护作用.方法选择杂种上海犬(上海农科院犬养殖厂)12只,体重7～12 kg.随机分成应用含氧血持续肺动脉灌注的实验组和对照组,分别测定体外循环前、结束即刻、结束后1 h的肺功能,体外循环术后2组左、右心房内血白细胞记数以及肺水含量的变化.体外循环转流前、后分别在右肺门处随机切取肺组织(3 cm×3 cm大小)送病理检查.结果术后实验组的肺功能明显改善,左、右心房血白细胞记数差异无显著性,肺水含量与对照组比较差异无显著意义.对照组显示肺泡间质明显水肿,肺泡内大量的中性粒细胞渗出,实验组保留了正常的肺组织结构.结论含氧血持续肺动脉灌注可减轻主动脉阻断期间肺组损伤,保护术后肺功能.     

日本血吸虫副肌球蛋白T细胞表位的预测和鉴定

目的鉴定日本血吸虫副肌球蛋白的T细胞表位。方法用SYFPEITHI软件预测日本血吸虫(中国大陆株)副肌球蛋白的T细胞表位，候选表位分别命名为P20、P21、P22、P23、P24。设计并合成候选表位的编码核苷酸，定向克隆入融合表达载体pET-32c( )，经酶切及测序鉴定出重组克隆。阳性克隆经IPTG诱导表达，表达产物以Ni^2 -NTA柱亲和层析及透析纯化。纯化后的硫氧还蛋白(Trx)融合蛋白体外刺激C3H／HeJ及C57BL／6小鼠腹股沟淋巴结或脾脏单个核细胞，^3H-TdR掺入法检测其增殖。结果候选表位中P20、P21、P22、P23能有效刺激C3H鼠致敏淋巴细胞细胞增殖，P20、P22能刺激C57鼠致敏淋巴细胞增殖。结论P20和P22可能是日本血吸虫副肌球蛋白的通用性T细胞表位。     

大鼠延髓腹外侧区在可乐定心血管效应中的作用

目的：探讨大鼠延髓腹外侧区（VLM）在介导可乐定心血管效应中的作用。方法：氨基甲酸乙酯麻醉SD大鼠，应用微量注射和细胞外记录等方法观察尾端延髓腹外侧区（CVLM）和头端延髓腹外侧区（RVLM）内局部给予可乐定导致的心血管活动变化。结果：单侧CVLM微量注射可乐定（5nmol/100nl,n=10)不仅能明显升主动脉血压（AP）和增加心率（HR）（P＜0．01），而且能增加同侧RVLM压力敏感性神经元（n=80)的放电频率（P＜0．01），而单侧RVLM微量注射可乐定（5nmol/100nl,n=9)，明显降低AP和HR（P＜0．01）。结论：RVLM和CVLM在介导可乐定的心血管效应中具有不同的作用。