氟伐他丁对高血压患者血管内皮依赖性舒张功能的影响

目的　探讨他丁类降脂药是否具有改善高血压患者血管功能的作用。　方法　 ～ 级轻中度高血压患者 5 5人 ,在常规抗高血压治疗的同时 ,加用氟伐他丁 (Flu) 2 0～ 4 0 m g/ d,并与 37例单纯常规抗高血压治疗病人对比。采用彩色多普勒超声检查肱动脉 (BA)和胫前动脉 (TA)的管腔内径。采用充血法测定血管内皮依赖性舒张功能 (Δ Dia- P)。　结果　 Flu治疗 3个月 ,血脂水平明显下降 ,可见 TA血管 Δ Dia- P改善 (% :8.5 1± 3.0 7vs14 .19± 5 .4 1,n=6 ,P<0 .0 5 ) ,以后均维持在较高水平。治疗 3个月时 BA的 ΔDia- P也有改善 ,但未达统计学差异水平 ,治疗 12个月时 BAΔ Dia- P明显改善。多元逐步回归分析在所观察的参数中未发现和血管功能有固定关系的因素。　结论　 Flu能够使接受常规降压药治疗的高血压患者的 Δ Dia- P改善。小剂量长时间的 Flu可以改善血管舒张功能。药物干预后 TA的功能变化出现较早 ,是反映血管功能变化的敏感靶点     

海洛因依赖伴发意识障碍与苯二氮滥用关系

目的了解海洛因依赖者脱毒时伴发意识障碍与苯二氮     

一氧化氮及一氧化氮合酶在遗传性癫痫易感大鼠惊厥发作中的作用

目的：探讨一氧化氮、一氧化氮合酶在遗传癫痫易感大鼠惊厥发作中的变化及作用。方法：选择惊厥评分在30－40的P77PMC大鼠35只，均分A－G7组，A组为对照组、G组预先30min腹腔注射一氧化氮合酶抑制剂L－NAME，分别于铃声刺激致惊后0．5、1、2、4,12h断头处死，取出脑组织分离双侧大脑皮层、海马等组织匀浆，测定一氧化氮及一氧化氮合酶，分别统计并进行t检验。结果：惊厥后0．5－1h皮层、海马一氧化氮、一氧化氮合酶逐渐升高，2h达峰值，4－12h恢复正常，应用L－NAME后，一氧化氮、一氧化氮合酶升高被抑制，但大鼠惊厥评分增高并致1例惊厥后死亡和明显延长惊厥持续时间。结论：惊厥后大鼠体内一氧化氮、一氧化氮合酶合成增加，给予合成酶抑制后能明显下降，但能加重惊厥程度和延长持续时间，提示一氧化氮于惊厥后升高，可能作为内源性抑制性性质，在惊厥发作自行终止机制中具有重要作用。     

围术期维持活体部分移植小肠血供的措施

目的：探讨围术期维持移植小肠血液灌注的方法，方法：男，18岁，短肠综合征患者，全麻下接受其父亲供给末段回肠150cm，行活体部分小肠移植，围主期维持出入量平衡，中度等容血液稀释，选用扩血管药，防止血管痉挛，以及抗凝治疗，结果：术的31d脱离肠外营养，至今已术后34mo，未发生移植小肠明显缺血性改变。结论：采用上述方法匀是维持围术期移植小肠血供的重要措施。     

安定对大鼠局灶性脑梗死半影区神经细胞死亡的保护作用

目的　研究安定对光化学诱发脑梗死后细胞死亡的保护作用 .方法　使用光化学诱发的大鼠局灶性脑缺血模型 .采用原位末端标记技术 (TU NEL)检测凋亡细胞 .大鼠脑梗死术后存活 3,6 ,12 ,2 4 ,4 8和 72 h,分别观察梗死灶坏死中心面积和凋亡细胞数目 .术前 2 4 h开始腹腔注射安定 (10mg·kg- 1· 8h- 1 ) ,直到处死动物 .结果　TUNEL 阳性细胞位于坏死中心与正常皮层之间的半影区 .TUNEL 阳性细胞的均数随着梗死后时间的延长逐渐增多 ,2 4 h达到高峰 .在2 4 h时间点 ,安定治疗组梗死坏死中心的平均最大面积和TUNEL阳性细胞均数与对照组相比 ,明显减少 (P<0 .0 0 1) .结论　安定可明显减少成年大鼠局灶性脑梗死后的细胞坏死和凋亡 .该结果可为临床使用安定治疗缺血性脑血管病提供理论依据     

Type II pneumocytes modulate surfactant production in response to cigarette smoke constituents: Restoration by vitamins A and E

This study was to evaluate the effects of cigarette smoke constituents upon type II pneumocyte surfactant production in vitro, and how vitamins A and E may alter the response. Freshly isolated type II pneumocytes from Sprague–Dawley rats were incubated 20 h in medium with fetal bovine serum that was or was not treated with cigarette smoke. The number of adherent cells was inversely related to the dose of smoke or benzo(a)pyrene. Despite the decreased number of treated cells, the total amount of surfactant per culture well was unchanged, whereas surfactant production per cell was significantly increased (P < 0.05). Vitamin A concentration was significantly (P < 0.05) lower in the smoke-treated serum compared with untreated serum. When vitamin A or E was added to the cigarette smoke-treated serum, cell adherence and surfactant production returned to control values. In conclusion, cigarette smoke constituents or benzo(a)pyrene alone decreased the number of adherent type II pneumocytes, but did not alter surfactant amounts because of an increased production of surfactant per cell. Type II pneumocytes seem to adjust surfactant production dependent upon the number of type II pneumocytes to produce it and vitamin A or E enhance cell attachment in the presence of the smoke toxins.     

665例结肠息肉对比分析

目的探讨不同年龄组患者结肠息肉的临床病理意义。方法回顾性分析本院内镜室11年间资料完整的结肠息肉病例665例,息肉885枚。按年龄分组：〈31岁,31～40岁,41～50岁,51～60岁,〉60岁五段。将不同年龄患者的性别、息肉部位、大小、个数、黏膜情况、是否有蒂、病理类型等参数进行对比,采用卡方检验。结果各年龄组结肠息肉的检出率明显不同,随年龄的增长,息肉的检出率逐渐升高;不同年龄组结肠息肉患者在不同性别、息肉是否有蒂等参数差异无统计学意义（P〉0.05）;而不同年龄组结肠息肉在大小、个数、表面情况、病理类型以及发生部位等参数差异有统计学意义（P〈0.05）。结论年龄〉50岁是结肠息肉癌变的危险因素之一,50岁以上受检者应行全结肠镜检查并完整切除后做病检,定期随访,减少癌变的机会。     

金黄色葡萄球菌D型肠毒素抗血清的制备和致敏血球效果的初步观察

我们制定了制备抗-SED血清的免疫方案,抗原用量6.9mg/兔,注射8针,免疫时间共14周。实验表明,抗-SED血清效价可达1∶128,所制备的抗血清与纯度高(98%)及纯度较低(50%～60%)的SED肠毒素都只产生1条沉淀线,并且融合,同SEA、SEB、SEC_I、SEC_Z均没有交叉反应。硫铵盐析沉淀法提取的抗-SED IgG,用于致敏醛化血球,该抗体诊断致敏血球检出SED灵敏度较高,约1ng/ml。同时用该抗体诊断血球对6种罐头食品人工污染SED肠毒素进行了检验,检出灵敏度为0.78～3.12ng/ml,略低于含纯SED标本,食物成分对反向间接血凝没影响,不出现假阳性和假阴性。效价高或效价低的抗-SED血清都可用于致敏醛化血球。     

Point mutation in the parkin gene on patients with Parkinson’s disease

Summary To investigate the distribution of possible novel mutations from parkin gene in variant subset of patients with Parkinson’s disease (PD) in China and explore whether parkin gene plays an important role in the pathogenesis of PD, 70 patients were divided into early-onset group and late-onset group; 70 healthy subjects were included as controls. Genomic DNA from 70 normal controls and from those of PD patients were extracted from peripheral blood leukocytes by using standard procedures. Mutations of parkin gene (exon 1–12) in all the subjects were screened by PCR-single strand conformation polymorphism (SSCP), and further sequencing was performed in the samples with abnormal SSCP results, in order to confirm the mutation and its location. A new missense mutation Gly284Arg in a patient and 3 abnormal bands in SSCP electrophoresis from samples of another 3 patients were found. All the DNA variants were sourced from the samples of the patients with early-onset PD. It was concluded that Parkin point mutation also partially contributes to the development of early-onset Parkinson’s disease in Chinese. WANG Tao, male, born in 1961, Associate Professor This work was supported by grants from the key program of the special scientific project of Scientific & Technologic Agency of Hubei Province (Serial No. 2001AA308B01) and the Hygienic Research Project of Hygienic Agency of Hubei province (Serial No. WJ 01529).