芦沙坦和苯那普利对高血压大鼠左室肥厚的抑制作用

目的：研究芦沙坦及苯那普利对老龄前期自发性高血压大鼠（SHR）左室肥厚及丝裂素活化蛋白激酶（MAPK）的抑制作用。方法：将老龄前期SHR随机分为SHR对照组，苯那普利（10mg.kg^-1.d^-1）及芦沙坦（30mg.kg^-1.d^-1）治疗组，治疗期为3个月，每月测压一次，治疗结束后处死动物，测定心肌肥厚指标、血中及心肌中内皮素（ET）、血管紧张素AⅡ及MAPK。结果：苯那普利及芦沙治疗后血压、心肌肥厚指标、血中及心肌中内皮素（ET）及MAPK明显低于SHR相对照组（P＜0．01），芦沙坦组血中及心肌中AⅡ无下降。结论：AⅡ、ET及MAPK参与了SHR的血压升高及心肌肥厚的形成。苯那普利及芦沙坦有抑制AⅡ、ET及MAPK的活性，从而达到降压及逆转心肌肥厚的作用。     

比索洛尔改善充血性心衰心功能及心肌重塑的疗效观察

目的　观察比索洛尔 (bisoprolol)对充血性心衰心功能及心肌重塑的临床疗效 .方法　 2 12例患者随机分为比索洛尔组和常规药物组 ,比索洛尔剂量起始量 0 .6 2 5 mg～1.2 5 0 mg,1次· d- 1 ,逐渐增加至最大剂量为 2 .5 mg～ 5 .0mg,1次· d- 1 .观察心功能、临床疗效、左室舒张末内径(L VEDD)、左室收缩末内径 (L VESD)、射血分数 (EF)、舒张早期 E峰流速 /舒张晚期 A峰流速 (VE/ VA) .结果　比索洛尔组与常规药物组比较 ,比索洛尔治疗 3m o后有效者(87.7% )高于常规药物组 (6 6 .0 % ) ,P <0 .0 5 ;冠心病(87.9% )和扩张型心肌病心衰 (91.9% )疗效明显好于常规药物组 (分别为 6 6 .7% ,6 7.4 % ) ;治疗 6 mo后重度心衰者疗效(90 .0 % )明显好于常规药物组 (6 5 .4 % ,P <0 .0 5 ) .治疗后比索洛尔组 L VESD[(44 .8± 3.9) m m vs(48.8± 4 .6 ) mm],EF[(40 .7± 7.5 ) % vs (35 .7± 5 .2 ) % ]优于常规药物组 (P<0 .0 1) ;L VEDD,VE/ VA也较治疗前有明显改善 .结论　比索洛尔改善充血性心力衰竭临床症状 ,促进心脏收缩、舒张功能恢复 ,部分逆转心肌重塑 .     

The healing of femoral neck fractures in dogs

Summary This study evaluates healing fractures of the femoral neck in dogs by using standard radiography, intraosseous venography, India ink staining and histology.The 45 animals were divided into three groups, one of which was not treated, but in the other two the fracture was fixed with a screw or two Kirschner wires.Our results suggest that, when intraosseous venography was positive, India ink injection was also positive, and the late phase of fracture healing was reached.

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Résumé Etude de la consolidation des fractures du col fémoral chez le chien à l'aide des radiographies standard, de la phlébographie osseuse, de la coloration par l'encre de Chine et de l'examen anatomopathologique. Les animaux ont été divisés en trois groupes, dans l'un la fracture n'a pas été traitée, dans les deux autres elle a été fixée soit par une vis, soit par deux broches de Kirschner. Les résultats tendent à montrer que lorsque la phlébographie est positive, la coloration par l'encre de Chine l'est également et que la phase ultime de la consolidation est atteinte.

     

335例术后全身炎症反应综合征的临床分析

【目的】了解手术创伤对术后全身炎症反应综合征 (SIRS)的影响。【方法】搜集外科重症监护室 (SICU) 335例患者的术后资料 ,分析不同手术组SIRS发病率 ;手术时间、失血量与SIRS持续时间的关系 ;SIRS持续时间与术后并发症的关系。【结果】术后SIRS发病率为 75 8% ,大手术高达 92 4 % ;无并发症患者失血量与SIRS持续时间呈正相关 (r1=0 783,P<0 0 1) ,手术时间与SIRS持续时间呈正相关 (r2 =0 398,P <0 0 1) ;随着SIRS持续时间延长 ,并发症发病率显著增高 (P<0 0 5 )。【结论】术后SIRS发生、发展与手术创伤密切相关 ;监测SIRS进程有助于及早发现并发症     

抗前列腺增生药SL—89．0519—08的合成

目的：研究治疗前列腺增生的α1－受体拮抗剂SL－89．0519－08的合成路线。方法：以5－氯－2－甲氧基苯胺为原料，经环合，烃化，脱保护基和亲核取代等步骤，合成了目标化合物，同时对原料合成工艺进行了摸索。结果：合成的目标化合物经IR，^1HMNR,EI-MS和HRMS得以确证。结论：该合成工艺和路线适宜工业化生产。     

神经干细胞静脉移植治疗脊髓损伤的实验研究

[目的]观察神经干细胞静脉移植对损伤大鼠脊髓功能的治疗作用。[方法]取孕14—16dSD胎鼠的脑室下区组织，体外培养后鉴定细胞。制作脊髓全切模型，伤后1周将Brdu标记好的神经干细胞通过尾静脉注射移植到大鼠体内，移植后及8周行皮层体感诱发电位（CSEP）检测和BBB功能评分，并留损伤脊髓处作病理切片及免疫组化染色。[结果]（1）移植后8周BBB评分损伤组、移植组都有所恢复，但都未达到正常水平，移植组恢复较好；（2）模型制作后，CSEP波均消失，细胞移植后8周移植组的波形有不同程度的恢复，但潜伏期延长；（3）移植组大鼠脊髓损伤处存在大量Brdu染色阳性细胞，表明移植的细胞在体内可到达损伤脊髓处并能存活；脊髓损伤部位NF-200及GFAP染色阳性的细胞表明移植的细胞可以分化为具有神经元和胶质细胞特性的细胞。[结论]静脉移植的神经干细胞能到达损伤区代替受损的神经元及神经胶质细胞，使损伤的脊髓功能得到一定程度的恢复。     

Serine hydroxymethyltransferase isoforms are differentially inhibited by leucovorin: characterization and comparison of recombinant zebrafish serine hydroxymethyltransferases.

Serine hydroxymethyltransferase (SHMT) provides activated one-carbon units required for the biosynthesis of nucleotides, protein, and methyl group by converting serine and tetrahydrofolate to glycine and N(5),N(10)-methylenetetrahydrofolate. It is postulated that SHMT activity is associated with the development of methotrexate resistance and the in vivo activity of SHMT is regulated by the binding of N(5)-CHO-THF, the rescue agent in high-dose methotrexate chemotherapy. The aim of this study is to advance our understanding of the folate-mediated one-carbon metabolism in zebrafish by characterizing zebrafish mitochondrial SHMT. The cDNA encoding zebrafish mitochondrial SHMT was cloned, overexpressed in Escherichia coli, and purified with a three-step purification protocol. Similarities in structural, physical, and kinetic properties were revealed between the recombinant zebrafish mitochondrial SHMT and its mammalian orthologs. Surprisingly, leucovorin significantly inhibits the aldol cleavage of serine catalyzed by zebrafish cytosolic SHMT but inhibits to a lesser extent the reaction catalyzed by the mitochondrial isozyme. This is, to our knowledge, the first report on zebrafish mitochondrial folate enzyme as well as the differential inhibition of leucovorin on these two SHMT isoforms. Western blot analysis revealed tissue-specific distribution with the highest enrichment present in liver for both cytosolic and mitochondrial SHMTs. Intracellular localization was confirmed by confocal microscopy for both mitochondrial and cytosolic SHMTs. Unexpectedly, the cytosolic isoform was observed in both nucleus and cytosol. Together with the previous report on zebrafish cytosolic SHMT, we suggest that zSHMTs can be used in in vitro assays for folate-related investigation and antifolate drug discovery.     

Juvenile Xanthogranuloma with Ocular Involvement

Abstract:   Juvenile xanthogranuloma is a benign histiocytic skin disorder encountered primarily in infancy and childhood. Approximately 0.4% of cases exhibit ocular manifestations, which can result in glaucoma and blindness. We present a case of a 7-month-old male with unilateral glaucoma associated with Juvenile xanthogranuloma, and emphasize the importance of an ocular screening in patients with Juvenile xanthogranuloma, especially those with periocular lesions.     

复杂主动脉病变的腔内血管外科治疗

目的 探讨复杂主动脉病变的腔内血管外科治疗方法。方法 对21例合并有内脏动脉缺血等复杂的主动脉病变,双球管定位下经锁骨上动脉到股动脉交换导丝以确保真腔内植入带膜支架,对真腔完全被假腔压闭的患者采取真腔内加压推进以通过导丝,用超长带膜支架来封堵大破口治疗夹层合并巨大假性动脉瘤形成,对夹层合并腹主动脉瘤患者采取血管腔内技术联合开腹手术等方法。结果 术后内漏3例,其中2例7 d后停止,1例漏血持续存在。3例主动脉创伤术后完全康复,余18例复杂主动脉夹层术后即时造影示瘘口已被完整覆盖,假腔无血漏入,内脏动脉等恢复真腔供血。18例中6例合并肠管缺血,3例合并肾动脉缺血,3例肠管缺血、肾动脉缺血,2例腹主动脉真腔完全被假腔压迫,以及2例合并下肢缺血术后均逐渐恢复,无脏器及肢体缺血坏死发生。2例合并腹主动脉瘤夹层行支架型人工血管封闭夹层破口后行开腹手术切除腹主动脉瘤、人工血管置换。16例随访5～36个月,平均22.3月,1例内漏持续存在,但假腔未继续加大,其余患者存活良好。结论 对复杂的主动脉病变的治疗,通过对腔内血管外科技术进行改进,并适当结合传统手术方法,使某些过去被认为不能够治疗的复杂主动脉病变可得以成功治疗。