冷冻同种异体骨段移植修复股骨近段大块骨缺损

为观察大块冷冻同种异体骨移植后免疫功能的改变及预后,对13例恶性骨肿瘤瘤段切除后的骨缺损10.8～19.4cm(平均为14.6cm),分别采用冻冷异体松质骨段移植的髋关节加压融合术(6例)和异体股骨近段半关节移植成形术(7例)修复.10例分别于术前4天及术后14和28天检测其空腹外周血各项免疫学指标,以及术后3、6、9、12、24、48个月进行99mSPECT骨扫描(5例)和X-线片检查(12例),以观察宿主的免疫反应和异体骨愈合情况.结果:①外周血T淋巴细胞亚群(OKT3+,OKT4+,OKT8+)及血清补体(C3,C4)和循环免疫复合物(CiC)手术前后比较无显著性差异(P>0.05).②99mTe SPECT骨扫描显示:术后3～6个月移植的异体骨两端及髓腔内同位素浓集明显低于正常,而异体骨两端所对应的自体骨端同位素浓集明显高于正常,此现象于植入后9个月开始减弱,可达数年.X线片显示:异体骨愈合率为92.3%(12/13),2例移植的异体松质骨段于术后4～6年完全成活替代.以上可见:①冻冷异体骨段移植后宿主的全身免疫机能改变不明显,其反应是以局部炎症为主的细胞免疫过程;②异体骨可做为修复大块骨缺损的良好材料.     

Effect of superantigen on ion electrophysiology and permeability in rabbit maxillary sinus epithelia

Objective Superantigens are potent inflammatory stimuli which derive from pathogenic microbes such as bacteria, viruses and protozoa. The aim of this study was to investigate the role of superantigens on the function of rabbit maxillary sinus epithelium. Methods Twenty New Zealand white rabbits were divided into 4 groups. Rabbit sinus mucosa was separated under a surgical microscope and mounted in Ussing chambers to record short circuit current, conductance and permeability to horseradish peroxidase (HRP). Group A was used as normal control. Group B was stimulated with an injection of superantigen into the sinus for 4 hours. The sinus mucosa of Group C was stimulated by the addition of tumor necrosis factor α (TNF-α) into Ussing chambers. Group D sinus mucosa was stimulated by superantigen after pretreatment with anti-TNF-α antibody. Results Superantigen evoked increases in sinus epithelial cell baseline short circuit current, conductance and permeability to HRP stimulated by the addition of TNF-α into Ussing chambers. These were similar to results from superantigen stimulation in vivo. The effect of superantigen on sinus epithelial cells could be blocked by pretreatment with anti-TNF-α antibody. Conclusions Superantigen affected the function of sinus epithelial cells, including the capability of epithelial defensive barrier, which might be mediated by TNF-α.     

烟雾吸入伤后肺泡上皮液体清除机能的变化及其意义

观察烟雾吸入伤后肺泡上皮液体清除功能的变化及其意义。方法 :Wistar大鼠 4 2只 ,随机分为正常对照组 (C组 )、烟雾致伤组 (I组 )、阿咪洛利组 (A组 )、哇巴因组 (O组 )、阿咪洛利加哇巴因组 (AO组 )和特普他林组 (T组 )。采用大鼠烟雾吸入伤模型。伤后 2 4h测定肺泡内液体清除率 (ALC)、总肺水量 (TLW )和肺血管外肺水量 (EVLW )。结果 :I组ALC降低 4 6.8% ,TLW和EVLW进一步增加 ;AO组ALC则降至最低点 ,TLW和EVLW升至最高点。而T组ALC明显增高 ,TLW和EVLW显著减少。ALC与TLW和EVLW之间显著相关。结论 :肺泡上皮液体清除功能障碍是烟雾吸入伤后早期肺水肿形成的因素之一。     

人载脂蛋白E基因型测定方法的建立

目的：建立一种准确、简便和经济的适用于大范围测定载脂蛋白Ｅ基因型的方法。方法：自中血中采用ＴＫＭ法提取人基因组ＤＮＡ,ＰＣＲ－ＲＦＬＰ确定载脂蛋白Ｅ的基因型,硝酸银染色聚丙烯酰胺凝胶,若银染效果不佳可用硝酸脱色后重染。结果：ＴＫＭ法获得ＤＮＡ在产量和质量上均能满足ＰＣＲ需求;电泳凝胶经银染可得清晰的ＤＮＡ特异带,据此能准确确定样品载脂蛋白Ｅ的基因基因型;用硝酸溶液脱色后的凝胶经重染仍可得到清晰的图     

胆必清对内毒素诱导的大鼠腹腔巨噬细胞内游离钙浓度的影响

目的：探讨中药胆必清对内毒素诱导的大鼠腹腔巨噬细胞游离钙浓度的影响。方法：制备大鼠腹腔巨噬细胞并在体外进行孵育,使用荧光探针用荧光法测定钙浓度。巨噬细胞随机分为正常对照组,内毒素LPS组,小、中和大剂量中药组。结果：LPS能诱导巨噬细胞[Ca2^ ]i的升高。加入胆必清后,[Ca2^ ]i可有不同程度的降低。结论：胆必清能抑制LPS诱导的大鼠腹腔巨噬细胞内的[Ca2^ ]i升高,提示该药具有抗炎和免疫调节作用。     

McAb共刺激PBLs淋巴细胞在培养体系中的状态及超微结构的 …

通过用抗ＣＤ３,ＣＤ２８＋ＣＤ８０ ＭｃＡｂ激活健康人的ＰＢＬｓ,并以ＰＨＡ,ＩＬ－２,ＰＢＬｓ为对照组;对各组不同时间段的淋巴细胞超微结构进行观察。结果提示：ＣＤ３及ＣＤ２８＋ＣＤ８０刺激淋巴细胞增殖外,也能使淋巴细胞活化,细胞表现为胞体增大,细胞器增多,具有粗大的绒毛和突出伪足,并可见单核细胞吞噬活跃。     

高能震波结合外敷双柏油膏治疗跟痛症

目的:探讨高能震波结合双柏油膏外敷治疗跟痛症的临床疗效.方法:采用高能震波加双柏油膏外敷治疗跟痛症32例,并与32例单纯用高能震波治疗进行对照.结果:单纯震波治疗组3周后(近期)疗效的优良率为56.25%,3个月后(远期)疗效的优良率为81.25%;而高能震波结合外敷双柏油膏组则分别为84.37%和93.75%.结果表明,高能震波结合外敷双柏油膏治疗跟痛症,其近期疗效和远期疗效均有所提高,并能减轻震波治疗所带来的血肿、骨膜剥离等副作用.     

Screening and identification of 3-aryl-quinolin-2-one derivatives as antiviral agents against influenza A

Quinolin-2-one represents an important and valuable chemical motif that possesses a wide variety of biological activities; however, the anti-influenza activities of quinolin-2-one-containing compounds were rarely reported. Herein, we describe the screening and identification of 3-aryl-quinolin-2-one derivatives as a novel class of antiviral agents. The 3-aryl-quinolinone derivatives were synthesized via an efficient copper-catalyzed reaction cascade that we previously developed. Using this synthetic method, preliminary structure–activity relationships of this scaffold against the influenza A virus infection were systematically explored. The most potent compound 34 displayed IC₅₀ values of 2.14 and 4.88 μM against the replication of H3N2 (A/HK/8/68) and H1N1 (A/WSN/33) strains, respectively, without apparent cytotoxicity on MDCK cells. We further demonstrated that 27 and 34 potently inhibited the plaque formation of the IAV, rendering this scaffold attractive for pursuing novel anti-influenza agents.     

新生儿缺氧缺血性脑病血浆及脑脊液一氧化氮水平的变化

目的 :了解新生儿缺氧缺血性脑病 (HIE)时血浆和脑脊液 (CSF)中 NO水平的动态变化。方法 :采用硝酸根还原酶法 ,对 35例 HIE患儿 (轻度 10例、中度 13例、重度 12例 )分别于急性期、恢复期进行了血浆和 CSF NO水平测定。结果 :HIE急性期血浆 NO水平除轻度组外 ,中、重度组明显高于对照组 ,重度组又明显高于轻、中度组 ;恢复期轻、中、重度组血浆 NO水平均降至正常 ,与对照组比较差异无显著性。CSF中 NO水平增加的幅度与血浆成正比。结论 :血浆和 CSF中 NO水平与 HIE的脑损伤程度密切相关     

抑那通在前列腺癌内分泌治疗中的临床意义

目的为提高晚期前列腺癌内分泌治疗效果,１９９０年７月～１９９２年７月间对１７例前列腺癌患者进行了抑那通（药物除睾）的临床观察。方法随访３～５年获得可评价资料１６例病例,采用免疫酶联法测定ＰＳＡ变化,放免法检测性激素水平,用Ｉ－ＰＳＳ表调查排尿及生活质量,对前列腺及转移病灶、全身状况的变化进行对比观察。结果抑那通治疗后睾酮降至去势水平（Ｐ＜０．０１）,前列腺特异抗原及其他肿瘤标记物提示反应性良好,症状及全身状况明显改善。结论每月注射一次抑那通,如果与抗男性素剂联合使用可获得更安全有效的治疗效果。