准分子激光原位角膜磨镶术后角膜层间异物

目的:分析准分子激光原位角膜磨镶术(LASIK)术后角膜层间异物情况。方法:在LASIK手术的6239例(12312眼)中,对术后出现角膜层间异物残留病例的相关原因和处理方法进行统计分析。结果:304眼(2.47%)出现角膜层间异物残留。其中,50眼(0.41%)采用异物剔除和冲洗等及时合理的措施处理;254眼(2.06%)无须处理。所有病例预期的矫正视力均无明显影响,冲洗后3眼出现少许边缘性角膜上皮细胞植入。结论:LASIK术后出现角膜层间异物残留并发症的比例低,多数病例无须处理。通过对相关因素的控制可有效减少,但不能杜绝。及时合理的处理方法能提高视觉质量,LASIK手术安全可靠。     

Target identification and occupancy measurement of necrosis avid agent rhein using bioorthogonal chemistry-enabling probes

Necrosis is an important biomarker, which only occurs in pathological situations. Tracking of necrosis avid agents is of crucial importance toward understanding their mechanisms. Herein, we developed a modular probe strategy based on bioorthogonal copper-free click chemistry. Structural modification of rhein with transcyclooctene (TCO) led to the identification of rhein-TCO2 as the most active probe with specific necrosis affinity. In a systematic evaluation, the colocalization of rhein-TCO2 in the nucleus (exposed DNA and rRNA) of necrotic cells was observed. This work provides a foundation for the development of target-identified of rhein compounds, and binding to exposed DNA and rRNA may be an important target of rhein compounds in necrotic cells.

Structural modification of rhein with transcyclooctene (TCO) led to the identification of rhein-TCO2 as the most active probe with specific necrosis affinity.     

TLR4 rs4986790 polymorphism confers risk to Helicobacter pylori infection in Zhejiang,China and its enlightenment to nursing care

PurposePrevious literatures on the association between TLR4 gene rs4986790 polymorphism and Helicobacter pylori infection risk reported conflict results. We conducted a case‐control study and meta‐analysis to investigate whether TLR4 gene rs4986790 polymorphism confers risk to Helicobacter pylori infection.Patients and methods254 patients with Helicobacter pylori positive and 235 patients with Helicobacter pylori negative were enrolled. PubMed, Embase, CNKI (Chinese national knowledge internet) were carefully searched and reviewed. Odds ratio (OR) together with 95% confidence interval (CI) were applied to calculate the association power.ResultsGG genotype of TLR4 gene rs4986790 polymorphism contributes increased risk to the population of Zhejiang, China (p = 0.019). Meta‐analysis found that the positive findings came from Asian population by allele contrast (p = 0.006), homozygote comparison (p = 0.006) and recessive genetic model (p = 0.001).ConclusionTLR4 gene rs4986790 polymorphism is associated with Helicobacter pylori infection risk for population of Zhejiang, China. Combined with individual gene polymorphism, the accuracy of risk assessment of Helicobacter pylori infection can be improved and individualized health education can be provided for patients with Helicobacter pylori infection by nurses.     

SLC2A3 variants in familial and sporadic congenital heart diseases in a Chinese Yunnan population

BackgroundSolute carrier family 2 member 3 (SLC2A3), is a member of a superfamily of transport protein genes. SLC2A3 played an important role in embryonic development. Previous research reported SLC2A3 duplication was reportedly associated with congenital syndromic heart defects. However, it is not clear whether the gene is associated with non‐syndromic congenital heart disease. Our study aimed to elucidate the relationship between its variation and congenital heart disease.MethodsGenomic DNA extracted from the peripheral blood leukocytes of two families with CHD were sequenced with whole‐exome sequencing to identify variations, used Sanger sequencing to investigate SLC2A3 variants in 494 Chinese patients with CHD and 576 healthy unrelated individuals.ResultsIn members from the two families, three with CHD had the SLC2A3 (rs3931701) C > T variant. Of the 494 patients with CHD, 394 had gene variants (86 had the TT type and 308 had the CT type). Of the 576 healthy controls, 272 participants had gene variants (36 had the TT type and 236 had the CT type). The TT type [p < 0.0001, odds ratio (OR) =7.262, 95% confidence interval (CI) =4.631–11.388] and CT type (p < 0.0001, OR =3.967, 95% CI =2.991–5.263) of SLC2A3 (rs3931701) significantly increased the risk of sporadic ASD in a Chinese Yunnan population.ConclusionsSingle nucleotide variations of SLC2A3, particularly, the SLC2A3 (rs3931701) C > T variant increased the risk of CHD among the studied population.     

兔结膜重建中羊膜细胞外基质、保存羊膜及自体结膜的比较

目的:研究羊膜细胞外基质(amnion extracellular matrix,AECM)在兔结膜重建中的作用.方法:将36只新西兰白兔随机分为3组,均右眼实施手术,羊膜细胞外基质(AECM)组12眼,保存羊膜(frozen amnion membrane,FZAM)组12眼,自体结膜(autologous conjunctiva,AC)组12眼.术后对各组进行密切的跟踪观察,分别在术后1,2,4,8wk对术眼行印迹细胞学及病理学检查.结果:所有术眼均愈合良好,无瘢痕化及睑球粘连等并发症.术后2wk FZAM、AC组炎症细胞浸润高于AECM组,AECM溶解时间长于FZAM.杯状细胞分化方面:术后2wk,AECM组与AC组比较无统计学差异(P＞0.05);FZAM组与AECM、AC组比较统计学差异显著(FZAM组vsAECM组P＜0.01,FZAM组vsAC组P＜0.01).术后4,8wk,3组比较均有统计学差异(FZAM组vs AECM组P＜0.05,FZAM组vs AC组P＜0.05,AC组vs AECM组P＜0.05).结论:羊膜细胞外基质和保存羊膜作为结膜替代物有效,而羊膜细胞外基质比保存羊膜有更长的存活周期,自体结膜是修复结膜缺损最理想的替代物.     

ZX-5及其光学异构体对兔眼血流和大鼠视网膜功能恢复的影响

目的:研究ZX-5对缺血后视网膜功能的恢复作用,并比较其光学异构体(R,R)-ZX-5和(S,S)-ZX-5对脉络膜血流及缺血后视网膜功能恢复的影响。方法:用彩色微球技术研究兔高眼压下(40mmHg)脉络膜血流的变化。用视网膜电生理仪测量b波,评价大鼠缺血后视网膜功能的恢复情况。结果:10g/L(R,R)-ZX-5滴眼液50μL能在不同时间点提高脉络膜血流(P<0.05),而(S,S)-ZX-5在相同条件下对提高脉络膜血流没有影响。ZX-5和(R,R)-ZX-5在不同时间点对视网膜缺血后功能恢复作用明显(P<0.05),(R,R)-ZX-5的作用优于ZX-5;而(S,S)-ZX-5对缺血后视网膜功能的恢复作用不明显。结论:ZX-5和(R,R)-ZX-5对增加脉络膜血流量和促进视网膜功能的恢复有显著功效,(R,R)-ZX-5恢复视网膜功能的作用更强,有可能进一步开发成有效防治眼血流障碍相关性眼病的药物。     

模拟远程投送对甘油长期冷冻保存兔角膜内皮细胞的影响

目的:探讨在实验室模拟远程运输状态下机械振动对改良后甘油长期保存兔角膜内皮细胞(CEC)活性的影响。方法:通过改良后的甘油保存角膜的方法,实验室中保存兔角膜片3mo,实验室用摇床模拟远程运输环境,结合实际按不同时间、不同振动强度进行分组,分别进行CEC活性染色并行实验性PKP术,对比各组间模拟运输对角膜内皮的影响。结果:实验条件下观察指标并不随振动强度和时间变化,组间各项指标差异无显著性。结论:实验室模拟远程投送对甘油长期保存兔角膜的CEC无显著性影响。     

γ干扰素防治兔实验性后囊混浊的作用

目的:探讨γ干扰素对兔后囊混浊发生的防治作用。方法:将30只新西兰白兔60眼随机分为A、B和C三组,三组均行兔晶状体囊外摘除术,A组为对照组,术中晶状体囊袋内灌注BSS;B和C组为治疗组,术中晶状体囊袋内分别灌注106U/L、107U/Lγ干扰素。术后观察晶状体后囊膜变化。3mo后取角膜行光镜、扫描电镜观察角膜内皮变化及晶状体后囊膜铺片HE染色统计晶状体上皮细胞(LEC)的密度,并行免疫组化染色真彩色医学图象分析系统检测增殖细胞核抗原(PCNA)表达积分光密度(IOD)。结果:①3mo后临床观察可见,B组、C组的后囊混浊(PCO)发生率较A组明显减少(P<0.05),C组较B组的发生率少(P<0.05)。统计学分析均有显著性差异。②B组(2972.11±156.47)、C组(2775.23±154.01)后囊膜LEC密度较A组(3297.53±105.60)小,且C组的LEC密度相似文献   

胸腔镜的应用及现状

一、定义 胸腔镜手术全称为电视辅助胸腔手术(VATS),它是一种微创手术,借助胸腔镜及电视影像的辅助,只需要切开数个微小切口即可完成过去需大切口才能完成的手术.     

改良双钢板法对比微创内固定系统治疗复杂胫骨平台骨折的疗效综合评价

目的对改良双钢板法与微创内固定系统（uss）治疗复杂胫骨平台骨折的疗效进行对比分析。方法168例复杂胫骨平台骨折患者按照治疗方法不同分为改良双钢板组（89例,采用改良双钢板法治疗）和LISS组（79例,采用LISS法治疗）,对两种治疗方法的优缺点及疗效进行比较分析。结果改良双钢板组患者治疗效果优良率（89．9％,80／89）略大于LISS组患者的优良率（86．1％,68／79）,两组比较差异无统计学意义（P〉0．05）。两组患者均未出现深部感染及严重的神经损害、静脉血栓等并发症。改良双钢板组手术时间（89．2±13．6）min,术中出血量（188．4±45．6）ml,住院时间（16．5±1．8）d,愈合时间（13．3±2．1）个月,LISS组手术时间（74．3±12．5）min,术中出血量（236．5±65．5）ml,住院时间（16．7±2．1）d,愈合时间（11．4±1．5）个月,两组比较差异无统计学意义（P〉0．05）。结论对于复杂胫骨平台骨折患者的治疗,LISS与改良双钢板法的治疗效果无显著差异。