CD10表达在甲状腺滤泡性癌和滤泡型乳头状癌诊断中的作用

目的研究CD10表达在甲状腺滤泡性癌和滤泡型乳头状癌诊断中的作用。方法收集70例甲状腺良、恶性病变组织，其中包括15例滤泡性腺瘤、15例腺瘤性甲状腺肿、30例乳头状癌（包括9例滤泡型乳头状癌）和10例滤泡性癌，采用免疫组织化学方法检测CD10在上述组织中的表达。结果9例滤泡型乳头状癌中，7例表达CD10（77．8％），10例滤泡性癌中8例表达CD10（80．0％）；CD10在非滤泡型乳头状癌、滤泡性腺瘤、腺瘤性甲状腺肿和正常甲状腺组织中均不表达。结论对CD10表达的检测有助于对甲状腺滤泡性癌和滤泡型乳头状癌的诊断。     

不同输血方式对肺鳞癌患者围术期TNF—α和IL—lO的影响

[目的]探讨同种输血和自体输血对肺鳞癌患者围术期肿瘤坏死因子-α(TNF-α)和白细胞介素—10(IL—10)的影响和相互关系。[方法]2001年1月至2003年1月对31例肺鳞癌患者行肺癌根治术，将其分为两组，同种输血组(A组)17例，自体输血组14例(B组)。测定两组围术期血清中TNF-α和IL—10的浓度。[结果]A组输血后d1与输血前相比血清中TNF-α、IL-10浓度增高，以IL—10变化尤为明显，输血后d5TNF-α降低并接近输血前的水平，明显低于B组，IL—10仍明显高于输血前的水平。B组中不同时问IL—10无显著变化，TNF-α于ds明显高于输血前。[结论]肺鳞癌患者围术期同种输血后血清中TNF-α降低与IL—10升高有关，IL—10升高可能是同种输血后免疫抑制的重要原因。自体输血可减轻或去除这一作用。     

对血清蛋白白球比值参考范围的修改及其临床应用

目的探讨血清蛋白白球比值(A／G)的参考范围和A／G在计算过程中产生的误差对临床应用的影响。方法①选取健康查体人员统计其A／G参考范围；②从理论上分析A／G计算误差的存在。结果①以统计结果的2s置信区间作为A／G的参考范围是1.1～2.2；②A／G计算值的误差会远大于相应总蛋白和白蛋白的测定误差。结论A／G较合适的参考范围为1.1～2.2,并且在临床应用中仍可根据实际情况降低其范围的下限。     

IL-10在过敏性紫癜血管内皮损伤中的作用机制研究

目的　探讨白细胞介素 10 (IL 10 )在过敏性紫癜血管内皮损伤中的作用及机制。方法　建立人脐静脉内皮细胞 (HUVEC)培养模型 ,ELISA法检测过敏性紫癜患儿外周血单个核细胞 (PB MC)活化后培养上清IL 6、IL 1β、TNF α、IL 10等细胞因子的含量 ;AnnexinV/PI双染色法 ,流式细胞仪检测过敏性紫癜患儿PBMC培养上清所诱导的内皮细胞凋亡率。结果　①过敏性紫癜组PBMC体外刺激活化后IL 6、IL 1β、TNF α、IL 10等细胞因子的分泌量均明显高于对照组 (P <0 0 1) ,其培养上清诱导的内皮细胞凋亡率 (34 7± 10 3) %明显高于对照组 (3 6± 0 9) %。②抗IL 6、IL 1β、TNF α单克隆抗体联合阻断可明显降低过敏性紫癜患儿PBMC培养上清诱导的内皮细胞凋亡率 (2 2 6±5 9) % ,而抗IL 10单克隆抗体阻断则明显增加过敏性紫癜患儿PBMC培养上清诱导的内皮细胞凋亡率 (5 6 9± 16 5 ) %。③于过敏性紫癜患儿PBMC培养上清加入外源性IL 10 ,可明显降低IL 6、IL 1β、INF α等炎性细胞因子的表达 ,并明显降低内皮细胞凋亡率 (11 8± 3 1) %。结论　IL 10作为机体炎症反应负反馈调节过程中的一个重要枢纽 ,在过敏性紫癜炎症因子所介导的血管内皮损伤中起重要的保护作用。     

Safety and efficacy of botulinum toxin type A following long-term use

Botulinum toxin serotype A (BoNT-A) has long heritage of use leading to confidence in its safety and efficacy. The application of BoNT-A does not lead to persistent histological changes in the nerve terminal or the target muscle. Clinical trials defined the safety and tolerability profile of BoNT-A across common therapeutic indications and showed an incidence of adverse events of approximately 25% in the BoNT-A-treated group compared with 15% in the control group. Focal weakness was the only adverse event to occur more often following BoNT-A treatment. Long-term BoNT-A administration has been assessed in various treatment settings, with the level and duration of BoNT-A efficacy response being maintained over repeated rounds of injection with no major safety concerns. The treatment of children with cerebral palsy often require long-term, repeated, multimuscle BoNT-A injections that lead to the administration of comparably higher toxin doses. Despite the high total body doses used, their distribution over multiple muscles and injection sites means that systemic side effects are rare. Recent formulation changes have reduced the incidence of antibody development following treatment with BOTOX^®. These findings show long-term BoNT-A treatment to be both safe and efficacious for a wide variety of indications.     

Matrix metalloproteinases-2 and -9 in cervical cancer: different roles in tumor progression

The incidence of uterine cervical cancer has increased slightly in Western countries, with an increase in relatively young women. Overexpression of matrix metalloproteinases (MMPs)-2 and -9 has turned out as a prognostic factor in many cancers. We compared the expression of the proteins MMP-2 and MMP-9 in cervical primary tumors with clinical outcome and risk factors of cervical cancer. One hundred sixty-one patients with cervical cancer treated in Ume? University Hospital or Sahlgrenska University Hospital, Sweden, between 1991 and 1995 were included in the study. Paraffin-embedded tissue samples obtained prior to treatment were examined immunohistochemically by specific antibodies for MMP-2 and MMP-9. Forty-two percent of the tumors were intensively positive for MMP-2 and 31% for MMP-9. Nineteen percent of the samples were intensively positive for both proteinases and 47% negative or weak for both. Overexpression of MMP-2 seemed to predict unfavorable survival under Kaplan-Meier analysis and in the multivariate analysis. Early sexual activity and low parity seemed to correlate to overexpression of MMP-2. MMP-9 was not associated with survival or sexual behavior. Intensive MMP-9 was noted in grade 1 tumors. We conclude that MMP-2 and MMP-9 have different roles in uterine cervical cancer. MMP-2 could be associated with aggressive behavior, but MMP-9 expression diminishes in high-grade tumors.     

Digestive properties of the venom of the Australian Coastal Taipan, Oxyuranus scutellatus (Peters, 1867).

The digestive properties of Australian elapid snake venoms have not been studied to any great extent. To address this, the in vitro digestive properties of Oxyuranus scutellatus (Australian Coastal Taipan) venom were investigated in a simulation of the in vivo conditions using the parameters reported for the stomach of snakes and representative prey for this species. The amount of soluble protein released was measured over time using a bicinchoninic acid (BCA) assay. Dismembered mouse hindlegs were injected intramuscularly with 0.1 ml O. scutellatus venom (concentration 10 mg/ml) and maintained in a micro-anaerobic, acidic environment (pH approximately 1.2-1.7) at 25 degrees C. The bathing liquid was sampled every 24 h for 7 days, and assayed for soluble protein. Statistical analysis revealed that O. scutellatus venom increased the rate at which proteins were released when compared to a negative control suggesting the potential importance of envenomation in the digestion of whole prey.     

鸡抗内毒素卵黄抗体IgY的制备

目的：研究分别应用内毒素（LPS）、类脂A(LipidA)和大肠杆菌突变株15免疫鸡后其蛋黄中抗内毒素抗体IgY的产量、纯度、效价并筛选最佳免疫抗原。方法：分别应用内毒素（LPS）、类脂A(LipidA)和大肠杆菌J5突变株作为抗原免疫25周龄Leghom鸡，水溶法（WD）提取蛋黄中抗体IgY，双紫外光测定抗体含量，SDS-PSGE电泳检测抗体纯度，细胞酶联染色和ELISA检测抗体特异性、效价及筛选最佳免疫抗原。结果：3种抗内毒素IgY含量和效价分别为14.4mg/ml和1：12 800（J5）、10.61mg/ml和1：12 800（LPS）、9.26mg/ml和1：3200（LipidA），抗体纯度均为95％左右。结论：大肠杆菌突变株J5和内毒素（LPS）为最佳免疫抗原，免疫鸡后其蛋黄中抗内毒素抗体IgY的产量和效价最高。     

新化合物 A-失碳-17β-羟基-17α-乙炔基-Δ3(5),9(10)-雌甾二烯-2-酮的合成

报道新化合物A-失碳-17β-羟基-17α-乙炔基-Δ^3(5),9(10)-雌甾二烯-2-酮2的合成。文中探讨了用炔钾粗品对A-失碳-Δ^3(5),9(10)-雌甾二烯-2，17-二酮１和Ａ-失碳-６β，１９-环氧-Δ³-雄甾-2，17-二酮3的选择性炔化，分别得标题化合物2（44%）及Ａ-失碳-17β-羟基-17α-乙炔基-６β，１９-环氧-Δ³雄甾-2-酮４（６５％），４经还原性破开环氧、去羟甲基和去醋酰氧基合成了标题化合物２。四步总收率为３４％。