内眼手术前,后结膜囊细菌学研究

目的:探索眼科内眼手术前后结膜囊细菌学变化特点及临床眼科用药效果。方法:133眼需要行内眼手术的连续病例包括白内障手术68眼、青光眼手术39眼、视网膜脱离手术20眼、玻璃体切割术6眼。用133眼内眼手术病人手术前后的结膜刮片及68眼白内障手术术毕的前房冲洗液作细菌培养,并作药敏试验。结果:133眼内眼手术患者入院时结膜刮片作细菌培养有61眼(45.85％)培养出细菌,其中金黄色葡萄球菌23眼、表皮葡萄球菌25眼、G~ 杆菌13眼;手术消毒前结膜囊刮片有8眼(6％)仍培养出细菌,其中金黄色葡萄球菌3眼,表皮葡萄球菌5眼;68眼白内障手术患者前房冲洗液中仅1眼(1.5％)培养出细菌,为表皮葡萄球菌;术毕时结膜刮片4眼(3％)培养出细菌,所培养出来的细菌均对妥布霉素、庆大霉素、先锋Ⅵ、万古霉素和利福平敏感,而对四环素、氯霉素、红霉素、氧氟沙星耐药。结论:肉眼手术前应用有效抗菌素至为重要,可预防眼内炎的发生,但不可轻视手术无菌操作。眼科学报1999;15:267-269。     

Molecular characterization of a new excitatory insect neurotoxin with an analgesic effect on mice from the scorpion Buthus martensi Karsch.

Besides the neurotoxins active on mammals, a new excitatory insect selective toxin with a mice analgesic activity was found and purified from the venom of the scorpion Buthus martensi Karsch (BmK) (Ji, Y.H., Mansuelle, P., Terakawa, S., Kopeyan, C., Yanaihara, N., Hsu, K., Rochat, H., 1996. Toxicon 34, 987; Luo, M.J., Xiong, Y.M., Wang, M., Wang, D.C., Chi, C.W., 1997. Toxicon 35, 723.). This peptide (designated as BmK IT-AP) is composed of 72 amino acid residues. Its primary structure was determined by automated Edman degradation of the N-terminal part of the reduced and S-carboxamidemethylated protein and its lysylendopeptidase degraded fragments. Based on the determined sequence, the gene specific primers were designed and synthesized for 3' and 5' RACE (rapid amplification of cDNA ends). Their partial cDNA fragments obtained by 3' and 5' RACEwere cloned and sequenced and the full length cDNA sequence of BmK IT-AP was then completed by overlapping their two partial cDNA sequences. It encodes a precursor of 90 amino acid residues: a signal peptide of 18 residues and a mature peptide of 72 residues which are consistent with the determined protein sequence of BmK IT-AP. The genomic DNA of the peptide was also amplified by PCR from the scorpion genomic DNA and sequenced, which is a first report on the genomic structure of a scorpion toxin specific for insects. Its sequence revealed an intron of 590 bp inserted in the end part of the signal peptide. The peptide caused a fast excitatory contraction paralysis on house fly larvae. Furthermore, the peptide also showed an obvious analgesic effect on mice, as assayed by using a twisting test model. This effect of BmK IT-AP well characterized at molecular level is first reported among the known scorpion insect neurotoxins.     

HIV-1 infected mononuclear phagocyte secretory products affect neuronal physiology leading to cellular demise: relevance for HIV-1-associated dementia

Viral and cellular products from HIV-1-infected and/or immune competent mononuclear phagocytes (MP) (brain macrophages and microglia) affect neuronal function during HIV-1-associated dementia (HAD). Neurotoxic MP factors include, but are not limited to, pro-inflammatory cytokines, chemokines, platelet activating factor, arachidonic acid and its metabolites, nitric oxide, progeny virions and viral structural and regulatory proteins. The mechanisms for immune-mediated neural injury in HAD, only now, are being unraveled. In this regard, we reviewed the current knowledge of how postmitotic neurons, which can neither divide nor be replaced, are damaged by MP secretory activities. Linking neuronal function with brain MP activation was made possible by placing viral and/or immune products onto neurons and measuring cell signaling events or through ex vivo electrophysiological tests on MP-treated brain slices. Such linkages are shown, in this report, by select demonstrations of MP factors which cause neuronal dysfunction in HAD.     

生孢梭菌孢子作为生物指示剂用于残存概率灭菌工艺验证的可行性

测定并分析生孢梭菌孢子在不同介质及不同温度下的耐热参数，评价生孢梭菌孢子的耐热特性及其作为生物指示剂在残存概率湿热灭菌工艺验证中的应用。     

强胰降糖胶囊对四氧嘧啶小鼠和家兔血糖的影响

研究纯中药制剂强胰降糖胶囊治疗糖尿病的药理作用，结果表明，强胰降糖胶囊能降低四氧嘧啶糖尿病小鼠，家兔的血糖，降低四氧嘧啶糖尿病小鼠的24h饮水量、进食量，对体重无影响。     

RP-HPLC测定犬血浆中卡托普利

目的　采用反相高效液相色谱法测定犬血浆中卡托普利浓度。方法　以对溴苯乙酰基溴为衍生剂 ,血浆样品经衍生反应后 ,用乙酸乙酯 -苯 (1∶1)提取 ,以ODSC18为固定相 ,乙腈∶水∶冰醋酸 (4 5∶5 5∶0 2 )为流动相 ,UV2 5 8nm紫外检测。结果　在 2 5～ 6 0 0 μg·L-1浓度范围线性良好 ,最小检测浓度为 12 5 μg·L-1。其日内差及日间差RSD分别小于 4 95 %和 2 88% ,相对回收率大于 94 8%。结论　方法简便灵敏 ,为卡托普利样品分析及临床药物监测提供了检测方法。     

多肽药物分析方法研究进展

介绍多肽药物的生物活性分析、结构分析、纯度分析的发展状况。     

93例扁桃体鳞癌的治疗分析

目的 探讨扁桃体鳞癌治疗方式。方法 本院自1987年到1996年共收治扁桃体鳞癌93例，回顾性分析其临床资料。结果 扁桃体鳞癌预后与病理分级、临床分期、治疗方法等诸多因素相关。本院采用根治手术 术后放疗的综合疗法治疗中晚期扁桃体鳞癌22例，5年生存率达68．18％。结论 治疗除早期病例可考虑行单纯手术或单纯放疗外，中晚期病例应采取以手术为主的综合治疗。     

Cetuximab, a monoclonal antibody targeting the epidermal growth factor receptor, in combination with gemcitabine for advanced pancreatic cancer: a multicenter phase II Trial.

PURPOSE: To determine the response rate, time to disease progression, survival duration and rate, and toxicity with the combination of cetuximab and gemcitabine in patients with epidermal growth factor receptor (EGFR)-expressing advanced pancreatic cancer. PATIENTS AND METHODS: Patients with measurable locally advanced or metastatic pancreatic cancer who had never received chemotherapy for their advanced disease and had immunohistochemical evidence of EGFR expression were eligible for the multicenter phase II trial. Patients were treated with cetuximab at an initial dose of 400 mg/m(2), followed by 250 mg/m(2) weekly for 7 weeks. Gemcitabine was administered at 1,000 mg/m(2) for 7 weeks, followed by 1 week of rest. In subsequent cycles, cetuximab was administered weekly, and gemcitabine was administered weekly for 3 weeks every 4 weeks. RESULTS: Sixty-one patients were screened for EGFR expression, 58 patients (95%) had at least 1+ staining, and 41 were enrolled onto the trial. Five patients (12.2%) achieved a partial response, and 26 (63.4%) had stable disease. The median time to disease progression was 3.8 months, and the median overall survival duration was 7.1 months. One-year progression-free survival and overall survival rates were 12% and 31.7%, respectively. The most frequently reported grade 3 or 4 adverse events were neutropenia (39.0%), asthenia (22.0%), abdominal pain (22.0%), and thrombocytopenia (17.1%). CONCLUSION: Cetuximab in combination with gemcitabine showed promising activity against advanced pancreatic cancer. Further clinical investigation is warranted.     

Treatment of 78 cases of shoulder periarthritis by warming-needle method

Jiansanzhen, Tianzong (SI 11), Jugu (LI 16), Jianzhen (SI 9), Binao (LI 14) and Quchi (LI 11) were given warming-needle moxibustion to treat shoulder periarthritis in 78 cases, and the result showed total effective rate was 97.4%. Author: LI Jian-wu (1955-), male, junior consultant doctor Translator: WU Xue-fei