RP-HPLC法测定帕利百中醋酸泼尼松龙的含量及其有关物质

目的：采用反相高效液相色谱法(RP一HPLC)测定帕利百中醋酸泼尼松龙含量及其有关物质。方珐：采用ODS柱，以水一乙腈(60：40)为流动相测定醋酸泼尼松龙的含量；以水-乙腈(69：31)为流动相测定醋酸泼尼松龙有关物质的含量，均于254nm处检测。结果：醋酸泼尼松龙在质量浓度为24～56μg／ml范围内呈良好的线性关系(r=1．0000)，平均回收率为100．0％(RSD=0．4％，n=6)，日内RSD为0．4％(n=6)，日间RSD为0．3％(n=5)。结论：本法简便、快速、准确、可靠。     

女性睡眠呼吸暂停低通气综合征临床特点

OBJECTIVE: To realize the characteristics of symptoms and polysomnography in women with sleep apnea-hypopnea syndrome (SAHS) compared with that of male patients. METHODS: The symptoms and polysomnography were compared between men and women with SAHS and among mild (5 to 19 events/h), moderate (20 to 39 events/h), severe (> or = 40 events/h) of female patients. RESULTS: Female patients were older than that of male(51.1 +/- 11.2 yr versus 43.9 +/- 10.1 yr). The mean body mass index(BMI) for women was (27.8 +/- 3.9) kg/m2 and (28.1 +/- 3.8) kg/m2 for men. Women with higher AHI snored more severely, and female had a lower apnea hypopnea index (AHI) and apnea index (AI) but higher hypopnea index (HI) than did male. In addition, the respiratory events during non-rapid eye movement for men were significantly higher than that for women. CONCLUSION: Female patients are older than male but not more adipose. SAHS and respiratory events during NREM sleep are less severe in women.     

丹参根腐病及其微生物防治研究

丹参根腐病是由腐皮镰刀菌浸染所致的一种土传病害，近年来在四川的田间发病株率达10%-30%，导致丹参产量下降，品质变劣。对丹参根腐病的防治，一般化学农药难于有效，而且滥用化学农药合造成农药残留污染。利用有益微生物控制病原菌是一种可行的措施，本研究从生长在不同生态环境的丹参根际土样中分离了一批木霉菌株，通过室内拮抗试验和田问防病增产试验，筛选出了对腐皮镰刀菌有较强拮抗作用的哈茨木霉T23、桔绿木霉T56等菌株。田间试验结果，T23、T56对丹参根腐病的防效分别为52．3％和55．7％，与常用化学杀菌剂多菌灵的防效相当，表明木霉防治丹参根病病具有较好的应用前景。     

P27蛋白在中耳乳突胆脂瘤上皮中的表达及意义

目的探讨P27蛋白在中耳继发性胆脂瘤上皮中的表达,分析其在胆脂瘤上皮增生调节中的可能作用.方法运用免疫组化En Vision染色法和计算机图像分析法,检测32例胆脂瘤上皮和9例胆脂瘤患者外耳道皮肤中P27蛋白的表达情况.结果 P27表达在胆脂瘤上皮及外耳道皮肤的棘层及颗粒层的细胞核,两种组织P27阳性表达的平均灰度值(±s,下同)分别为(159.698 3±6.991)和(153.138 6±4.702 2),两者差异有显著意义(P＜0.01).结论 P27胆脂瘤上皮的低表达有可能是胆脂瘤上皮细胞高度增殖的原因之一.     

大黄蒽醌含量测定方法的研究

目的：测定大黄中游离蒽醌和总蒽醚的含量。方法：采用甲醇冷浸法，利用蒽醌衍生物在碱性条件下呈红色的特点，用可见分光光度法测定其含量。结果：该法测定平均回收率为100．2％，RSD＝2．96％(n＝5)，线性范围为5μg一30μg，r＝0．9999。结论：用本法检测大黄中的蒽醌含量，方法简便，结果可靠。     

中国汉族人群遗传性聋基因座位STR位点的遗传多态性研究

目的 研究中国汉族人群10个遗传性聋基因座位的短串连重复序列(STR)的遗传多态性。方法 应用PCR方法对10个位点进行扩增，变性聚丙烯酰胺凝胶电泳分离，记录基因型。采用PPAP软件计算正常人各STR位点等位片段频率、基因型频率、预期基因型频率、多态信息量(PIC)和Hardy-Weinberg平衡吻合性检验。结果 中国汉族人群D6S287、D8S1132、D13S1275、D15S130、D1S2726、D4S3038、D2S2380、D22S282、D14S1042、D7S529各位点分别检出10个、9个、8个、7个、7个、7个、6个、6个、6个及5个等位片段，多态性分布均符合Hardy-Weinberg平衡定律。各位点PIC值分别为0．879、0．854、0．864、0．821、0．686、0．794、0．764、0．732、0．773、0．712；杂合度均高于0．7。结论 中国汉族人群10个位点STR均具有较高的杂合度和多态信息量，是较理想的遗传标记。     

Treatment of 25 cases of obstruction of Qi in the chest by Tuina

应用一指禅手法为主治疗25例胸痹患者,结果显示推拿对胸痹患者的各种临床症状均有缓解作用,治愈10例,好转14例,无效1例.     

经尿道灌注自杀基因治疗大鼠膀胱癌的实验研究

目的:探讨经尿道膀胱灌注脂质体和逆转录病毒载体介导的自杀基因(HSVtk),观察在羟基无环鸟苷(ganciclovir,GCV)作用下大鼠膀胱肿瘤的生长情况.方法:用N-甲基-亚硝基脲(MNU)膀胱灌注建立大鼠原位膀胱癌模型.经尿道膀胱灌注脂质体、逆转录病毒载体HSVtk基因,随后腹腔内注射GCV,连续6天.结果:经尿道膀胱灌注HSVtk基因后48h,RT-PCR检测出膀胱肿瘤中HSVtk基因表达.逆转录病毒组和脂质体组膀胱总重量与裸质粒组和对照组相比有显著差异,表明膀胱肿瘤的生长被抑制.TUNEL法原位检测肿瘤组织中凋亡细胞不仅出现在表层细胞,而且深层细胞大量凋亡,推测旁观者效应可能发挥了一定作用.结论:经尿道膀胱灌注脂质体DNA或重组逆转录病毒载体可以向肿瘤转导HSVtk基因.HSVtk/GCV系统能抑制大鼠原位膀胱肿瘤的生长,显示出抗肿瘤作用.     

Expression of constitutively active Notch4 (Int-3) modulates myeloid proliferation and differentiation and promotes expansion of hematopoietic progenitors.

The Notch family of transmembrane receptors has been implicated in the regulation of many developmental processes. In this study, we evaluated the role of Notch4 in immature hematopoietic progenitors by inducing, with retroviral transduction, enforced expression of Int-3, the oncogenic and constitutively active form of mouse Notch4. Int-3-transduced human myeloid leukemia (HL-60) cells demonstrated significantly delayed expression of differentiation markers following retinoic acid and 12-0-tetradecanoylphorbol 13-acetate treatment. Furthermore, HL-60 cells expressing Int-3 displayed a slower growth rate than cells infected with void virus, and accumulation in the G0/G1 phases of cell cycle. Transduction with deletion mutants of Int-3 defined the importance of individual domains of the protein (in particular, the ANK domain and the C-terminal domain) in the inhibition of differentiation and growth arrest of HL-60 cells. When mouse bone marrow enriched for stem cells (5-fluorouracil-resistant, lineage negative) was transduced and cultured for two weeks, the Int-3-transduced population displayed a lower expression of differentiation markers and a three- to five-fold higher frequency of colony-forming cells (CFU-GM/BFU-E) than control cultures. These results strongly support the notion that Notch signaling inhibits differentiation and promotes expansion of hematopoietic stem/progenitor cells.