人甲胎蛋白时间分辨免疫荧光分析试剂盒的研制

目的研制人甲胎蛋白(hAFP)时间分辨免疫荧光分析(TRFIA)试剂盒.方法采用双抗体夹心法建立AFP TRFIA 试剂盒,对试剂盒的各项指标进行评价.结果试剂盒的可测范围为l～1 000 U/ml,灵敏度为0.17 U/ml,精密度良好,批内和批间的精密度分别为3.3%～5.9%,3.7%～6.5%.与CEA、CA12-5、CA19-9、CA15-3、白蛋白无交叉反应.稳定性试验表明试剂可以在4℃稳定1年,37℃稳定7 d.426份正常血清标本测试该试剂盒的正常参考值范围是0～12 U/ml.用本试剂盒与国外同类试剂盒同时检测60份血清标本,其相关系数为0.995.结论试剂盒各项指标(灵敏度、精密度、特异性、稳定性、准确度)均达到临床检测要求,可替代国外同类产品试剂盒.     

林县冬贮菜中亚硝酸盐及维生素C的含量分析

对林县食管癌高发区两种冬贮菜中亚硝酸盐和维生素C的动态分析,表明亚硝酸盐含量随蔬菜冬贮时间延长而增加,维生素C含量则逐渐降低,两者成负相关。提示蔬菜冬贮过程中应尽量减少维生素C的破坏。     

组织多肽特异性抗原在乳腺癌中的临床研究

OBJECTIVE: To investigate the expression of serum tissue polypeptide-specific antigen (TPS) in breast cancer patients and its clinical value in such cases. METHODS: Altogether 160 subjects (90 patients with breast cancer, 40 with benign breast lesions, and 30 healthy subjects) were enrolled in this study. The serum TPS and CA153 levels were measured by ELISA in all the subjects. RESULTS: The levels and positivity rate of serum TPS and CA153 in breast cancer group were significantly higher than those in the normal subjects group and benign lesion group (P<0.01), and became even higher as the malignancy progressed. High serum TPS level was detected in the cancer patients in stage I. Serum TPS level was the most sensitive to bone metastasis of the malignancy, but its highest levels occurred in cases of lymphoid node metastasis (P<0.05). In patients who responded favorably to the treatment, serum TPS and CA153 levels were significantly reduced (P<0.05), but the reduction in TPS levels tended to be more obvious (P<0.05). CONCLUSION: Serum TPS can be used as a very useful and sensitive tumor marker in the diagnosis of breast cancer, especially in case of bone metastasis, and may be of great value in clinical decision-making and assessment of therapeutic effect.     

垃圾处置场填埋作业区整体布局的完善设计

目的：完善上海市老港垃圾处置场，有效地缓解“垃圾包围城市”的局面和城市垃圾出路难的问题。方法：对老港场的整体布局进行完善设计．结果：在老港场完成1期工程的基础上，2期工程的设计相应增加了填埋区的供电、供水，修筑隔堤、道路、污水处理等土建设施和运输车辆、填埋作业机械配套等，并增加了环境保护措施，如污水收集和处理系统，沼气导排，营造绿化隔离带等．     

Anatomic and spiral computed tomographic study of the genial tubercles for genioglossus advancement.

OBJECTIVE: To measure and compare Chinese mandibular genial tubercles measured anatomically and with computed tomography (CT). STUDY DESIGN AND SETTING: Spiral CT scans were taken of 40 adult human skulls; the superior genial spines were measured using anatomic and CT methods. RESULTS: The height and width of the superior genial spines, mandible thickness, and distance from the menton to the inferior and superior margins of the superior genial spines were 5.82 +/- 0.71, 6.98 +/- 1.35, 11.95 +/- 1.59, 11.08 +/- 2.05, and 16.91 +/- 2.30 mm from anatomic measurements and 6.17 +/- 0.71, 7.01 +/- 1.13, 12.19 +/- 1.64, 10.41 +/- 1.55, and 15.73 +/- 2.12 mm using spiral CT, respectively. The anatomic and CT measurements were correlated. CONCLUSION: Spiral CT of the genial tubercles can help locate the osteotomy in genioglossus advancement. SIGNIFICANCE: This study acquired reference data on Chinese genial tubercles demonstrating that CT measurements of the genial tubercles reflect their anatomy, which should allow accurately locate the osteotomy.     

Experimental studies of electroacupuncture on ventricular fibrillation threshold in rats with acute ischemic myocardium

Summary By ligating the proximate left anterior descend (LAD) of coronary artery and inducing the ventricular fibrillation with electrical stimulation, the preventive effects of electroacupuncture (EA) on ventricular fibrillation were observed. The results showed that the ventricular fibrillation threshold (VFT) of rats with acute ischemic myocardium was raised after acupuncturing some acupoints, which could prevent the occurrence of ventricular fibrillation. Furthermore, the combination of EA and propranolol could enhance the VFT effectively, and they showed a good synergistic effect. This project was supported by grants from National Natural Science Foundation of China (No. 3870563).     

A STUDY ON DETECTION OF SERUM FASTING TOTAL BILE ACID AND CHOLOYGLYCIN IN NEONATE FOR CHOLESTASIS

ＡＳＴＵＤＹＯＮＤＥＴＥＣＴＩＯＮＯＦＳＥＲＵＭＦＡＳＴＩＮＧＴＯＴＡＬＢＩＬＥＡＣＩＤＡＮＤＣＨＯＬＯＹＧＬＹＣＩＮＩＮＮＥＯＮＡＴＥＦＯＲＣＨＯＬＥＳＴＡＳＩＳＧｕｏＷｅｎ（郭文）；ＷｕＭｉｎｇｃｈａｎｇ（吴明昌）；ＰｅｉＸｕｅｙｉ（裴学义）；Ｇ...     

单发性双侧面横裂伴有家族遗传和染色体异常3例报告

报告3例单发性双侧面横裂伴有三代家族遗传史和相同的染色体异常核型,相同的对称性恒牙(胚)先天性缺如,并对面横裂的发病机制及病因学进行了讨论。这是一组极罕见的病例,在所涉猎的文献中,迄今尚未见相同报道,是否为一种新的综合征,目前尚不能定论,有待今后进一步探讨     

Differentiation-induced ML-1 cells as targets for transformation by a chemical carcinogen

The capacity for continuous proliferation (immortalization) of ML-1 human myeloblastic leukemia cells derives from their sensitivity to growth factors and their insensitivity to differentiation factors (DF) at the limiting concentrations at which these are present in the culture medium. Upon increasing the concentration of DF, or after treatment with DNA-specific anticancer agents, the cells exit the proliferation program and differentiate to monocyte/macrophage-like cells (Y. Honma, C. Honma, and A. Bloch, Cancer Res., 46: 6311-6315, 1986). The study reported here shows that when ML-1 cells, induced to differentiate with DF contained in mitogen-stimulated human leukocyte-conditioned medium (CM) are treated with the carcinogen N-nitroso-N-methylurea, their differentiation program is interrupted and proliferation is resumed at a stably increased rate of growth (doubling time, 25.1 versus 31.3 h). This "step-up" transformation is brought about by only a narrow concentration range of carcinogen, acting at a restricted time interval following differentiation induction. The step-up transformed cells are more sensitive to growth factor signals and less sensitive to DF signals than are untreated ML-1 cells. When retreated with a higher concentration of DF and the same concentration of N-nitroso-N-methylurea, the transformed cells undergo a further decrease in doubling time to 21 h. Differentiation-uninduced ML-1 cells do not respond to treatment with N-nitroso-N-methylurea, indicating that differentiation-induced cells, at an early stage of the maturation process, may be the targets for the carcinogen-mediated transformation.     

儿童生殖细胞瘤全脑放射治疗中自适应消除摆位累积误差新技术探讨

目的 以影像引导放射治疗(image guided-radiotherapy, IGRT)为基础探讨儿童生殖细胞瘤全脑自适应放射治疗(以下简称放疗）(adaptive radio therapy,ART）可行性,为临床全脑ART提供依据。方法 回顾性研究首都医科大学附属北京天坛医院放射治疗科20例中枢神经系统生殖细胞肿瘤(germ cell tumors, GCTs)行全脑预防性照射的放疗患者。每例患者治疗前三次及后每周行一次锥形束电子计算机断层扫描(cone beam computed tomography,CBCT),共7次。记录整个治疗过程中左右(lateral, LAT)、进出(longitudinal, LNG)、升降(vertical, VRT)方向上的摆位误差值。原计划命名为Plan_A,将因摆位误差值产生新的治疗中心点(treatment center point,ISO)回归治疗计划系统,不改变射野权重、射野分布情况下进行体积剂量计算,用Plan Sum功能相加摆位累积误差产生新计划得到Plan_B。将摆位累积误差产生的新计划用Acuros XB算法重新快速优化后用Plan Sum功能相加得到Plan_C。对比Plan_A、Plan_B、Plan_C的靶区及危及器官(organ at risk, OAR)剂量变化并用Wilcoxon配对符号秩检验证统计学差异。结果与Plan_A相比,Plan_B 均匀性指均匀性指数（homogeneity index, HI）95计划靶区（planning target volume, PTV）、 HI98 PTV为1.058 4~1.084 7。适形度指数(conformity index, CI）PTV为0.934 4。 临床靶区（clinical target volume, CTV）D_min相对偏差为－7.22%,P值为0.000 7。OAR相对偏差为－0.1%~9.8%。与Plan_ A相比,Plan_ C的HI95 PTV、 HI98 PTV为1.056 9~1.078 8。CI PTV为0.936 5。CTV D_min相对偏差为－1.69%,P值为0.545 9。OAR相对偏差为－0.15%~3.40%。结论儿童生殖细胞瘤全脑放疗摆位累计误差对靶区及危及器官剂量差异有统计学意义,摆位累计误差导致靶区均匀性及适形度变差,CTV的D_min 变化超过5%,OAR受量增高。ART再计划可以让靶区均匀性和适形度及危及器官受量接近原计划。同时Plan_B虽然存在相对偏差,但是危及器官的绝对剂量在合理范围内。