Sequence Communication: The amino acid sequence of protein AA from a burro (Equus asinus)

The primary structure of amyloid fibril protein AA of a burro has been determined by Edman degradation. The 80 amino acid residue long protein shows strong resemblance to that of other mammalian AA-proteins and differs from equine protein AA at 5 positions: Burro/horse positions 20 (Q/N), 44 (R,Q, K/K,Q), 59 (G,L/C;,A), 61 (Q/E) and 65 (N/R).     

面孔识别的脑加工成分——N170的ERP研究

目的：研究面孔识别早期加工脑成分N170，考察其是否反映面孔加工的特异性，是否反映Bruce-Young面孔认知模型中结构编码及面孔加工是否具有右半球优势等问题。方法：16名被试者学习和再认面孔照片，记录其脑电。结果：仅半数被试者出现N170，认知任务显著影响N170波幅，结论：N170不能反映面孔的结构编码，是否反映面孔加工特异性还值得进一步研究，面孔识别加工时两半球的优势在加工速度与加工强度两个维度上各占优势，并非单纯的右脑优势。     

不完全相合造血干细胞移植中GVHD的预测研究:模拟HLA抗原结构的比较与应用

采用通用的微量淋巴细胞毒实验和序列测定方法对拟进行造血干细胞移植的患者及供体进行HLA分型；用计算机分子模拟手段，从HLA分子三维结构方面探讨预测移植物抗宿主病（GVHD）发生程度，以预测移植后GVHD的发生情况。结果发现，8例供受体中，3例为半匹配移植，其中2例发生了Ⅳ度GVHD，1例发生了Ⅱ度GVHD；3例为两个抗原不相合移植，其中1例发生了Ⅱ度GVHD，2例发生了Ⅱ度GVHD；2例口才为一个抗原不相合移植，分别发生了Ⅰ度、Ⅱ度GVHD；GVHD的发生程度与HLA不相合抗原RMSD差异的大小呈正相关。提示异基因造血干细胞移植时，GVHD发生程度与HLA分子三维结构的差异有密切关系，三维结构分子模拟进行GVHD预测可以为临床医生提供较好的预后指标。     

TSRH钉棒结构在脊柱侧凸后路矫正中的应用

目的　探讨钉棒结构治疗脊柱侧凸的可行性和临床效果。方法　应用 TSRH钉棒结构治疗各种脊柱侧凸2 2例 ,术前平均 Cobb角 6 2°,2 2例术前均对畸形脊柱进行标准俯卧位 CT加密扫描 ,测量入钉点至椎体前缘的深度和椎体的旋转角度 ,根据测得数据确定椎弓根螺钉置入的深度和方向 ,术后再次行 CT扫描 ,评价置钉的准确性。结果　经 3～ 14个月随访 ,术后 Cobb角平均 18°,矫正率为 72 .5 % ;平均手术时间 3h 2 0 min,平均出血量 10 5 0 m L ,无感染 ,无神经并发症 ,无假关节形成 ,置钉准确率 96 .8%。结论　术前采用标准俯卧位 CT扫描 ,根据扫描图象测得的相关数据可为术中准确置入椎弓根螺钉提供重要参考。钉棒结构具有良好的三维矫正控制力 ,由于内固定部件较少 ,所以同时具有操作简便、手术时间短、出血量较少 ,费用较低等优点     

Structural architecture supports functional organization in the human aging brain at a regionwise and network level

Functional interactions in the brain are constrained by the underlying anatomical architecture, and structural and functional networks share network features such as modularity. Accordingly, age‐related changes of structural connectivity (SC) may be paralleled by changes in functional connectivity (FC). We provide a detailed qualitative and quantitative characterization of the SC–FC coupling in human aging as inferred from resting‐state blood oxygen‐level dependent functional magnetic resonance imaging and diffusion‐weighted imaging in a sample of 47 adults with an age range of 18–82. We revealed that SC and FC decrease with age across most parts of the brain and there is a distinct age‐dependency of regionwise SC–FC coupling and network‐level SC–FC relations. A specific pattern of SC–FC coupling predicts age more reliably than does regionwise SC or FC alone (r = 0.73, 95% CI = [0.7093, 0.8522]). Hence, our data propose that regionwise SC–FC coupling can be used to characterize brain changes in aging. Hum Brain Mapp 37:2645–2661, 2016. © 2016 Wiley Periodicals, Inc.     

微波辐射对小鼠联合型学习记忆功能及海马组织结构的影响

目的 探讨微波辐射对联合型学习记忆功能及海马组织结构的影响。方法 将小鼠按随机数表法分为假辐射组和微波辐射组,各27只。采用2.856 GHz、8 mW/cm²微波辐射C57BL/6N小鼠15 min,建立微波辐射动物模型。采用Morris水迷宫和穿梭箱行为学实验,研究微波辐射对小鼠空间学习记忆和联合型学习记忆功能的影响。观察海马组织病理学变化,研究微波辐射后海马组织超微结构改变。结果 Morris水迷宫结果表明,微波辐射后小鼠反向空间探索实验跨越平台次数减少,由(3.60±0.79)次降至(2.55±0.47)次(t = 2.21,P= 0.046);穿梭箱实验结果表明,辐射后小鼠平均主动逃避率显著下降(t = 2.70,P<0.05),平均主动潜伏期和总电击时间显著延长(t = -3.09、-3.02,P < 0.05)。辐射后8 d,海马CA3和DG区部分神经元核固缩,海马CA3区神经元凋亡、突触间隙模糊、胶质细胞肿胀、血管周隙增宽。结论 微波辐射可引起小鼠空间参考记忆能力及联合型学习记忆能力下降,海马组织形态学病理改变是其功能障碍的结构基础。     

Paternal genetic structure of the Qiang ethnic group in China revealed by high-resolution Y-chromosome STRs and SNPs

The Qiang population mainly lived in Beichuan Qiang Autonomous County of Sichuan Province. It is one of the nomads in China, distributed along the Minjiang River. The Qiang population was assumed to have great affinity with the Han, the largest ethnic group in China, when it refers to the genetic origin. Whereas, it is deeply understudied, especially from the Y chromosome. Here in this study, we used validated high-resolution Y-chromosome single nucleotide polymorphisms (Y-SNPs) and short tandem repeats (Y-STRs) panels to study the Qiang ethnic group to unravel their paternal genetic, forensic and phylogenetic characteristics. A total of 422 male samples of the Qiang ethnic group were genotyped by 233 Y-SNPs and 29 Y-STRs. Haplogroup O-M175 (N = 312) was the most predominant haplogroup in the Qiang ethnic group, followed by D-M174 (N = 32) and C-M130 (N = 32), N-M231 (N = 27), and Q-M242 (N = 15). After further subdivision, O2a-M324 (N = 213) accounted for the majority of haplogroup O. Haplogroup C2b-Z1338 (N = 29), D1a-CTS11577 (N = 30). O2a2b1a1a1-F42 (N = 48), O2a1b1a1a1a-F11 (N = 35), and O2a2b1a1-M117 (N = 21) represented other large terminal haplogroups. The results unveiled that Qiang ethnic group was a population with a high percentage of haplogroup O2a2b1a1a1-F42 (48/422) and O2a1b1a1a1a-F11 (35/422), and O2a2b1a1-M117 (21/422), which has never been reported. Its haplogroup distribution pattern was different from any of the Han populations, implying that the Qiang ethnic group had its unique genetic pattern. Mismatch analysis indicated that the biggest mismatch number in haplogroup O2a2b1a1a1-F42 was 21, while that of haplogroup O2a1b1a1a1a-F11 was 20. The haplotype diversity of the Qiang ethnic group equaled 0.999788, with 392 haplotypes observed, of which 367 haplotypes were unique. The haplogroup diversity of the Qiang ethnic group reached 0.9767, and 53 terminal haplogroups were observed (The haplogroup diversity of the Qiang ethnic group was the highest among Qiang and all Han subgroups, indicating the larger genetic diversity of the Qiang ethnic group.). Haplogroup O2a2b1a1a1-F42 was the most predominant haplogroup, including 11.37 % of the Qiang individuals. Median-joining trees showed gene flow between the Qiang and Han individuals. Our results indicated that 1) the highest genetic diversity was observed in the Qiang ethnic group compared to any of the former studied Chinese population, suggesting that the Qiang might be an older paternal branch; 2) the haplogroup D-M174 individuals of Qiang, Tibetans and Japanese distributed in three different subclades, which was unable to identify through low-resolution Y-SNP panel; and 3) the Qiang had lower proportion of haplogroup D compared to Yi and Tibetan ethnic groups, showing that the Qiang had less genetic communication with them than with Han Chinese.     

饮食结构调整对预防泌尿系结石复发的影响

目的研究根据结石成分分析结果调整饮食结构与结石复发的关系。方法 290例泌尿系结石患者进行结石成分分析,并随机分为2组,一组根据结石成分分析结果调整饮食,另一组则按传统方法嘱患者多饮水等,不进行特别的饮食结构调整。观察2组的复发率。结果饮食结构调整组复发11例（7.5%）,对照组复发23例（16.1%）,饮食结构调整组结石复发率明显低于对照组（χ2=5.181,P=0.023）,差异有统计学意义。结论根据患者代谢及结石成分分析结果进行调整饮食结构,可有效预防泌尿系结石的复发。     

协同办公平台设计与实现

分析协同办公平台应用现状与发展趋势,阐述中国疾病预防控制中心协同办公平台功能及架构设计,包括认证管理、权限管理、LDAP目录服务、工作流引擎、网络拓扑等方面,指出该平台有助于实现信息共享,充分利用各种资源提高工作效率和管理水平。