H3K27me3在胃癌中的表达及其临床意义

目的:研究H3K27me3在胃癌细胞和组织中的表达,并分析与临床病理因素的关系,探讨H3K27me3在胃癌发生发展中的作用和意义.方法:应用Western blot方法检测胃癌细胞系SGC7901、BGC823、AGS和正常胃黏膜上皮细胞GES-1中H3K27me3的表达;免疫组织化学方法检测61例胃癌组织及20例正常胃黏膜组织中H3K27me3的表达.结果:与正常胃黏膜细胞GES-1相比,H3K27me3在胃癌细胞SGC7901、BGC823、AGS中高表达;H3K27me3在胃癌组织中阳性表达率为80.3%,并与肿瘤大小、浸润深度、淋巴结转移、血管侵犯、临床分期、TNM分期有关(P=0.049,0.030,0.034,0.025,0.003,0.031),而与患者的性别、年龄、病变部位、分化程度、神经侵犯之间无相关性.结论:H3K27me3在胃癌中高表达,并与肿瘤的侵袭转移有关,可能是胃癌患者重要的预后因子.     

Replication of the association of the aspartic acid repeat polymorphism in the asporin gene with knee-osteoarthritis susceptibility in Han Chinese

A genetic association of osteoarthritis (OA) and functional polymorphisms in the aspartic acid (D) repeat of the asporin gene was reported in Japanese and European Caucasians; however, the results were controversial. Our objective was to evaluate whether the D repeat polymorphism was associated with knee OA in Han Chinese. The D repeat polymorphism was genotyped in 218 patients who suffered from primary symptomatic knee OA with radiographic confirmation and in 454 age-matched controls, and the allelic association of the repeat was examined. Frequencies of the D13 and D14 alleles were similar to those of Japanese, but different from those of European Caucasians. The D14 allele was significantly over-represented in knee OA patients (P=0.0013; odds ratio 2.04; 95% confidence interval 1.32–3.15). D14 was more frequent in early-onset patients than in late-onset patients (P=0.043) and the age at onset in patients with D14 was earlier (P=0.028; log-rank test). Thus, the association of the D14 allele with knee OA susceptibility was replicated in Han Chinese. This was the first instance that association of the OA susceptibility gene was definitely replicated between different ethnic groups.Electronic supplementary material Supplementary material is available in the online version of this article at and is accessible for authorized users.     

扩散加权成像在急性脑梗死消除金属假牙伪影中的应用

目的研究并行采集（SENSE）技术联合平面回波扩散加权像（EPI—DWI）技术在具有磁化率伪影的脑梗死中的应用。方法收集38例装有固定金属假牙脑梗死的患者资料,其中男性22例,女性16例：年龄52～86岁。平均年龄72岁。均行MRI头颅平扫、弥散加权成像（DWI）与SENSE—EPI—DWI。比较分析使用SENSE技术前后的右侧基底节区与右侧侧脑室脑脊液两者的信号强度对比度（SIR）（均数±标准差）、对比噪声比（CNR）、SIR、正常小脑表面扩散系数（ADC）值、梗死灶／健侧脑组织的ADC比值。结果①SENSE—EPI-DWI的右侧基底节区与右侧侧脑室脑脊液两者的SIR的均数士标准差高于常规EPI—DWI的序列（0．8100±0．3863vs0．6100±0．4687：t=9．872,P〈0．05）;@SENSE—EPI—DWI的CNR均高于常规EPI—DWI的CNR（11．6225vs4．3853;t=6．615,P〈0．05）;③SENSE—EPI—DWI的SIR均低于常规EPI—DWI的SIR（1．1332vs1．1586：t=-2．870．P〉0．05）：④SENSE—EPI—DWI的正常小脑ADC值均高于常规EPI—DWI序列的正常小脑ADC值（t=9．962,P〈0．05）：⑤SENSE—EPI—DWI的梗死灶,健侧脑组织的比值均高于常规EPI-DWI的梗死灶,健侧脑组织的比值（1．34vs1．06：t=5．216,P〈0．05）。结论SENSE—EPI-DWI技术的成像质量较高,正常小脑ADC值有助于脑梗死的诊断．且在具有磁化率伪影的脑梗死诊断应用中优于常规的EPI—DWI序列。     

CpG寡核苷酸对人外周血B淋巴细胞免疫刺激作用

目的观察CpG-ODN 2006和CpG-ODN 2216对健康人外周血单个核细胞中B淋巴细胞抗原递呈相关分子MHC-I、MHC-Ⅱ及共刺激分子CD 80、CD 86表达的影响,探讨CpG-ODN对B淋巴细胞抗原递呈功能的作用。方法CpG-ODN 2006、CpG-ODN 2216与健康人PBM C共培养48 h,用流式细胞技术以CD 19-P reCP“设门”其中B淋巴细胞,检测其表面CD 69、MHC-Ⅰ、MHC-Ⅱ、CD 80及CD 86的表达状况,并与未加CpG-ODN组进行比较。B淋巴细胞MHC-I、MHC-Ⅱ的表达量以几何平均荧光强度表示(M F I);CD 80、CD 86的表达量以阳性细胞百分率表示。结果CpD-ODN 2006和CpG-ODN 2216均显著提高B淋巴细胞CD 69、MHC-Ⅰ、MHC-Ⅱ、CD 80及CD 86的表达,与未加CpG-ODN组比较有显著性差异(P<0.05)。CpG-ODN 2216使B淋巴细胞表面抗原递呈相关分子的增加量更为明显。结论CpG-ODN能够提高B淋巴细胞表面抗原递呈相关分子和共刺激分子的表达,能增强B淋巴细胞递呈抗原的能力。     

Triptolide promotes generation of FoxP3+ T regulatory cells in rats

Ethnopharmacological relevance

Triptolide (TPT), a component of the Chinese herb Triptergium wilfordii, has potent immunosuppressive and anti-inflammatory activity and is used clinically in recipients of kidney transplantation.

Aim of the study

This work aimed to investigate the effect of TPT on the differentiation of regulatory T lymphocytes (Tregs) from CD4+ cells in rats.

Materials and methods

MACS-purified rat CD4+ cells were costimulated with anti-CD3 and anti-CD28 in the presence of TGF-β to induce the expression of FoxP3, which was detected by flow cytometry. TPT and cyclosporine A (CsA) were separately added into the cultures to observe the effect on the expression of FoxP3. Kidney transplantation was performed in rats that either received no treatment or were treated with TPT after transplantation.

Results

TPT treatment enhanced the expression of FoxP3 in CD4+ cells, whereas CsA inhibited the FoxP3 expression. In the rat kidney transplantation model, the recipient rats treated with TPT survived longer than the control rats (18–19.83 vs 6.83 days, P < 0.05). Meanwhile, the FoxP3+ T cells in the spleens of treated rats were higher than those from the untreated rats (12.4% vs 4.7%, P < 0.05).

Conclusions

These data suggest that TPT may promote the differentiation of CD4+ cells to FoxP3+ Tregs. This would be at least one of the pathways responsible for the immunosuppressive activity of TPT.     

重组人载脂蛋白A5原核表达载体的构建及分析鉴定

目的构建重组人载脂蛋白A5(apoA5)原核表达载体,为进一步制备抗apoA5的单/多克隆抗体奠定基础。方法从人肝癌组织中抽提总RNA,以此为模板,逆转录降度PCR扩增载脂蛋白A5编码区基因全长,构建含有目的片段的克隆载体pPCR-ScriptampSK(+)-apoA5及原核表达载体pET16B-apoA5,通过酶切、测序及诱导表达等验证重组质粒的准确性。结果PCR扩增出1.1kb特异性片段,克隆至pPCR-ScriptampSK(+)后测序,结果表明序列同源性与genebank报道一致,重组质粒pET16B-apoA5经双酶切后电泳显示约为5.7kb和1.1kb的片段,酶切图谱与预期一致,诱导表达蛋白的大小与预期一致。结论成功构建了重组人载脂蛋白A5的原核表达载体。     

产后表格式护理记录单的设计及应用

护理记录是指护士对病人住院期间护理过程的客观记录,包括病情观察、护理措施和效果[1-3].我科以往使用的一般护理记录单主要靠大量文字描述,由于记录人员评估能力及语言表达能力的不同,存在描述重点不突出、千篇一律、记录过于繁琐或过于简化、工作效率低等问题.为了提高护理记录的客观、完整、科学性,方便临床护士工作、减轻护士负担、提高工作效率,我院根据卫生部医政司<病历书写基本规范>和产后病区的特点,制定了产后表格式护理记录单,于2008年10月应用于临床,效果满意.现介绍如下.     

Sysmex XE-2100血细胞分析仪检测儿童末梢血异常细胞报警提示功能评价

目的对Sysmex XE-2100血细胞分析仪检测儿童末梢血异常细胞报警提示功能进行评价。方法采用Sysmex XE-2100血细胞分析仪对804例儿童末梢血标本进行检测,同时进行血涂片检查血细胞形态,通过统计比较,评价该血细胞分析仪异常细胞报警提示功能的可靠性能。结果 Sysmex XE-2100血细胞分析仪对儿童末梢血异常细胞报警提示功能的灵敏度为100%,特异性为69.80%,阳性预测值为54.10%,阴性预测值为100%,仪器检出准确度为77.74%,假阳性率为45.90%。结论 Sysmex XE-2100血细胞分析仪检测儿童末梢血异常细胞报警提示系统的功能良好,灵敏度高,可降低涂片复检次数,提高临床工作效率和检验质量,但同时也存在较高的假阳性率,需进一步对其进行血涂片镜检加以确认。     

螺旋CT三维重建颌骨内埋伏牙位置形态及与周围组织的关系

背景：埋伏牙会造成恒牙的异位,咬紊乱并影响美观和咀嚼功能。而清晰的影像评价是正确诊断的重要组成部分。目的：应用螺旋CT三维重建技术对颌骨内埋伏牙进行术前定位评估。方法：23例埋伏牙患者使用传统平片和螺旋CT进行术前检查。螺旋CT横断面扫描后应用表面阴影遮盖技术和多平面重建技术对埋伏牙进行三维重建。分别通过传统平片和螺旋CT三维重建图像对埋伏牙进行术前评估。所有埋伏牙最终经外科拔除证实,分别计算平片和螺旋CT诊断的准确性。结果与结论：螺旋CT三维重建能够清楚呈现埋伏牙的位置,形状及其与邻近组织结构的关系。传统平片和螺旋CT对埋伏牙位置评估的准确性分别是37.0%和100%,对牙根弯曲诊断的准确性为44.4%和88.9%。结果表明,螺旋CT三维重建技术能够清楚显示颌骨内埋伏牙的位置,形态及与周围组织结构的关系,从而有利于制定个性化,恰当的口腔治疗方案。     

HLA全相合异基因造血干细胞移植与免疫抑制剂治疗重型再生障碍性贫血的比较

背景：国外有报道显示异基因造血干细胞移植和免疫抑制疗法治疗急性重型再生障碍性贫血的有效率及总生存期相当,但两种疗法治疗后的生活质量及治疗费用方面的差异报道较少。目的：回顾性分析同胞HLA全相合异基因造血干细胞移植与免疫抑制疗法治疗急性重型再生障碍性贫血的疗效。方法：入选2004-07/2010-10在南京鼓楼医院血液科行同胞HLA全相合异基因造血干细胞移植的7例及行免疫抑制疗法的16例急性重型再生障碍性贫血患者,每3个月定期进行随访。结果与结论：异基因造血干细胞移植组在粒细胞和血小板恢复时间,脱离输血时间,治疗后3个月总有效率及治疗后12个月完全缓解率均优于免疫抑制疗法组,但治疗后12个月总有效率差异无显著性意义。异基因造血干细胞移植组与免疫抑制疗法组的总生存率分别为86%与81.3%,两组比较差异无显著性意义。治疗1年后两组患者总体健康状况及功能健康状况均提示良好,两组住院费用差异无显著性意义。