克林霉素静脉滴注致剥脱性皮炎

1例69岁男性患者,眼部手术后给予克林霉素0.6 g加入0.9%氯化钠注射液500 mL静脉滴注预防感染。给药20 min时患者出现胸、腹部皮肤瘙痒、疼痛,随后发展为红色斑丘疹。诊断为克林霉素致剥脱性皮炎,立即停药。给予10%葡萄糖酸钙注射液10 mL、维生素C注射液3.0 g加入5%葡萄糖注射液250 mL静脉滴注;地塞米松注射液10 mg加入莫菲滴管1次/d;氯雷他定10 mg,1次/d口服。第2天患者胸腹部、大腿根皮肤呈点片状脱屑,第3天胸腹部表皮出现大面积脱落。治疗10 d后患者皮损痊愈,出院。     

QCR2调控p53泛素化对SiHa细胞株的周期阻滞作用

目的 研究泛醇-细胞色素C还原酶亚基2(QCR2)对宫颈癌SiHa细胞株周期阻滞的影响,并探讨相关机制.方法 取对数期SiHa细胞,脂质体转染法将QCR2 siRNA、control siRNA转染至SiHa细胞,设为QCR2 siRNA组、control siRNA组,未经处理细胞设空白组.采用qRT-PCR、Wes...     

A pathogen-inducible endogenous siRNA in plant immunity

RNA interference, mediated by small interfering RNAs (siRNAs), is a conserved regulatory process that has evolved as an antiviral defense mechanism in plants and animals. It is not known whether host cells also use siRNAs as an antibacterial defense mechanism in eukaryotes. Here, we report the discovery of an endogenous siRNA, nat-siRNAATGB2, that is specifically induced by the bacterial pathogen Pseudomonas syringae carrying effector avrRpt2. We demonstrate that the biogenesis of this siRNA requires DCL1, HYL1, HEN1, RDR6, NRPD1A, and SGS3. Its induction also depends on the cognate host disease resistance gene RPS2 and the NDR1 gene that is required for RPS2-specified resistance. This siRNA contributes to RPS2-mediated race-specific disease resistance by repressing PPRL, a putative negative regulator of the RPS2 resistance pathway.     

β-内酰胺类抗生素过敏患者血清IL-2及sIL-2R表达

目的 探讨白细胞介素2(IL-2)及可溶性白细胞介素2受体(sIL-2R)与β-内酰胺类药物过敏之间的关系.方法 采用ELISA检测70例β-内酰胺类药物过敏反应患者(A组)与20例正常人(B组)外周血血清IL-2及sIL-2R的水平.采用放射免疫吸附(RAST)方法检测过敏患者血清中特异性IgE抗体.结果 A组血清IL-2水平显著高于B组(P<0.05)(4.110 ng/ml vs.2.070ng/ml).A组中IgE抗体阳性患者sIL-2R水平高于抗体阴性者(3.300 ng/ml vs.2.345 ng/ml)(P<0.05).结论 β-内酰胺类抗生素过敏反应的发生中,外周血血清IL-2水平升高;特异性IgE抗体阳性的过敏反应与sIL-2R水平升高有关.     

Met-enkephalin and preproenkephalin mRNA changes in the striatum of the nicotine abstinence mouse

We studied the changes of met-enkephalin (Met-Enk) content and preproenkephalin (PPE) mRNA in the striatum in a mouse model of nicotine abstinence. Nicotine, 2 mg/kg, s.c., was administered four times daily for 14 days and Met-Enk and PPE mRNA evaluated at various times (4-96 h) following drug discontinuation. Met-Enk, assayed by radioimmunoassay, was increased in the ventral (nucleus accumbens) but not dorsal (putamen/caudate) striatum, while PPE mRNA, assayed in whole striatum by Northern blotting was elevated. Both changes were seen early during withdrawal and lasted over 72 h. In situ hybridization revealed enhanced signal in the dorsal striatum, mostly laterally, and smaller increases in the rostral pole, core and shell of the nucleus accumbens. These observations indicate that during nicotine withdrawal, striatal enkephalinergic neurons undergo adaptative responses, which might contribute to the abstinence behavioral syndrome.     

rhGM-CSF联合纳米银外用对深Ⅱ度烫伤创面细菌变化的影响

目的研究外用重组人粒细胞-巨噬细胞集落刺激因子(rhGM-CSF)联和纳米银敷料外用对深Ⅱ度烫伤创面愈合过程细菌变化的影响。方法用Wistar大鼠建立深Ⅱ度烫伤模型,分为A、B、C、D 4组,A组给予凡士林纱布覆盖,B组给予纳米银敷料覆盖,C组给予rhGM-CSF涂抹创面,D组给予rhGM-CSF+纳米银敷料覆盖,伤后第1,4,7,10,14,21天,观察创面炎症反应情况及愈合情况,进行细菌培养并计数。结果炎症反应,A组B组C组D组;4组均在第10天出现明显的血管化和上皮化;创面愈合率,D组C组B组A组;A组、B组/C组、D组分别于伤后第4,10,14天出现细菌生长,D组与A组、B组、C组相比,B组/C组与A组相比,细菌生长数量少,并且第10,14,21天比较均有显著性差异(P均0.05)。结论 GM-CSF和纳米银联合外用,可加速深Ⅱ度烫伤创面愈合,减少细菌生长,减轻炎症反应,并且优于rhGM-CSF、纳米银单独应用。     

山茶籽联合雌二醇对去卵巢大鼠骨组织的影响

目的:了解小剂量山茶籽联合雌二醇对去卵巢大鼠骨组织的影响,为中西医结合治疗Ⅰ型骨质疏松症提供实验依据.方法:6月龄健康雌性大白鼠,分成假手术组(sham),去卵巢模型组(OVX),山茶籽组(Pr),雌二醇组(E2)和小剂量山茶籽醇提取物+雌二醇组(Ts+E2).取左股骨切片观察骨组织,取右股骨测量骨钙、磷和骨密度.结果:卵巢模型组的骨组织明显疏松,骨钙、磷低于Sham组,3个治疗组各时间的骨组织、骨钙、磷和骨密度与Sham组比较差异无统计学意义.小剂量的山茶籽联合雌二醇治疗能使去卵巢大鼠骨组织和骨钙、磷和骨密度恢复正常,与较大剂量的山茶籽组或较大剂量的雌二醇组相比无差异.结论:山茶籽对去卵巢大鼠的骨质疏松症的治疗效果良好;小剂量的雌二醇与山茶籽对去卵巢大鼠的骨质疏松症的治疗效果与单独使用较大剂量的山茶籽或较大剂量的雌二醇相比治疗效果相近.     

舌尖滴入微量24%蔗糖水对早产儿足跟采血疼痛反应的影响

[目的]探讨舌尖滴入微量24%蔗糖水对缓解早产儿疼痛的效果。[方法]将60例早产儿按照随机数字表法随机分为对照1组、对照2组、实验组各20例,共采血300次,对照1组足跟采血前无任何干预措施,对照2组足跟采血前15min～20min开始给予非营养性吸吮(在患儿口中放置安慰奶嘴,以增加其吸吮动作,但并无母乳或其他液体吸入)至疼痛刺激后5min,实验组足跟采血前2min舌尖滴入24%蔗糖水0.5mL～1.0mL。采用早产儿评分简表(PIPP)进行疼痛程度评分并比较。[结果]3组患儿足跟采血后PIPP评分值比较差异有统计学意义(P<0.05),进一步比较后发现实验组PIPP评分与对照2组评分比较差异有统计学意义(P<0.05),对照2组PIPP评分与对照1组评分比较差异有统计学意义(P<0.05)。[结论]舌尖滴入微量24%蔗糖水和非营养性吸吮对缓解新生儿疼痛有一定的效果,而舌尖滴入微量24%蔗糖水缓解早产儿疼痛的效果优于非营养性吸吮,且操作简单安全。