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| 1 | Structure and function of aggrecan显示文摘Aggrecan is the major proteoglycan in the articular cartilage. This molecule is important in the proper functioning of articular cartilage because it provides a hydrated gel structure (via its interaction with hyaluronan and link protein) that endows the cartilage with load-bearing properties. It is also crucial in chondroskeletal morphogenesis during development. Aggrecan is a multimodular molecule expressed by chondrocytes. Its core protein is composed of three globular domains (G1, G2, and G3) and a large extended region (CS) between G2 and G3 for glycosaminoglycan chain attachment. G1 comprises the amino terminus of the core protein. This domain has the same structural motif as link protein. Functionally, the G1 domain interacts with hyaluronan acid and link protein, forming stable ternary complexes in the extracellular matrix. G2 is homologous to the tandem repeats of G1 and of link protein and is involved in product processing. G3 makes up the carboxyl terminus of the core protein. It enhances glycosaminoglycan modification and product secretion. Aggrecan plays an important role in mediating chondrocyte-chondrocyte and chondrocyte-matrix interactions through its ability to bind hyaluronan. | CHRIS KIANI, LIWEN CHEN, YAO JIONG WU, ALBERT J YEE, BURTON B YANG, Sunnybrook and Women’s College Health Sciences Centre and Department of Laboratory Medicine and Patobiology, 2 Department of Surgeny, Faculty of Medicine, University of Toronto, Canada | 2002 | Cell Research2002，12，1： | 27 |
| 2 | Factors associated with time to laparoscopic cholecystectomy for acute cholecystitis显示文摘AIM: To determine patient and process of care factors associated with performance of timely laparoscopic cholecystectomy for acute cholecystitis. METHODS: A retrospective medical record review of 88 consecutive patients with acute cholecystitis was conducted. Data collected included demographic data, co-morbidities, symptoms and physical findings at presentation, laboratory and radiological investigations, length of stay, complications, and admission service (medical or surgical). Patients not undergoing cholecystectomy during this hospitalization were excluded from analysis. Hierarchical generalized linear models were constructed to assess the association of pre-operative diagnostic procedures, presenting signs, and admitting service with time to surgery.RESULTS: Seventy cases met inclusion and exclusion criteria, among which 12 were admitted to the medical service and 58 to the surgical service. Mean ± SD time to surgery was 39.3 ± 43 h, with 87% of operations performed within 72 h of hospital arrival. In the adjusted models, longer time to surgery was associated with number of diagnostic studies and endoscopic retrograde cholangio-pancreatography (ERCP, P = 0.01) as well with admission to medical service without adjustment for ERCP (P < 0.05). Patients undergoing both magnetic resonance cholangiopancreatography (MRCP) and computed tomography (CT) scans experienced the longest waits for surgery. Patients admitted to the surgical versus medical service underwent surgery earlier (30.4 ± 34.9 vs 82.7 ± 55.1 h, P < 0.01), had less post-operative complications (12% vs 58%, P < 0.01), and shorter length of stay (4.3 ± 3.4 vs 8.1 ± 5.2 d, P < 0.01).CONCLUSION: Admission to the medical service and performance of numerous diagnostic procedures, ERCP, or MRCP combined with CT scan were associated with longer time to surgery. Expeditious performance of ERCP and MRCP and admission of medically stable patients with suspected cholecystitis to the surgical service to speed up time to surgery should be considered. | Chris N Daniak David Peretz Jonathan M Fine Yun Wang Alan K Meinke William B Hale | 2008 | World Journal of Gastroenterology2008，14，7： | 13 |
| 3 | 1999年海城-岫岩地震序列的精准定位显示文摘1999年11月29日,北京时间12点10分39秒(04:10:39UTC)在我国辽宁海城—岫岩地区发生了一次MS5.4地震.这次地震是继1975年2月4日海城MS7.3地震之后该地区发生的震级最大的一次地震.区域性的辽宁数字地震台网记录了这一序列的前震、主震与余震.本文运用该台网的记录资料,用双差法对海城—岫岩地震序列重新定位,得到了该序列事件之间精确的相对位置;然后以中国地震局地球物理研究所(IGCEA)与美国南卫理大学(SMU)合作的辽宁海城—岫岩地区地震试验场宽频带地震台网(BSN)记录的、经过精准定位的地震作为近震源观测的'地面实况'(groundtruth,GT)事件进行校正,得到了这一地震序列的既精确又准确的震源参数.由此得出1999年海城—岫岩地震的发震构造是与1975年海城地震的发震构造海城河—大洋河断裂邻近的康家岭断裂.康家岭断裂的走向与海城河—大洋河断裂走向一致,均为WNW--ESE方向.它们都是在中国东北—华北地区近ENE--WSW向、几乎水平的压应力场作用下产生的断裂.1999年海城—岫岩地震是在海城河—大洋河断裂的影响带动下,邻近的、与其走向一致的康家岭断裂活动的结果. | 杨智娴 Brian W Stump 陈运泰 Robert B Herrmann Rongmao Zhou Chris T Hayward | 2011 | 地震学报2011，33，3： | 9 |
| 4 | Are faecal markers good indicators of mucosal healing in inflammatory bowel disease?显示文摘AIM: To review the published literature concerning the accuracy of faecal inflammatory markers for identifying mucosal healing. METHODS: Bibliographical searches were performed in MEDLINE electronic database up to February 2015,using the following terms: 'inflammatory bowel disease','Crohn′s disease','ulcerative colitis','faecal markers','calprotectin','lactoferrin','S100A12','endoscop*','mucosal healing','remission'. In addition,relevant references from these studies were also included. Data were extracted from the published papers including odds ratios with 95%CI,P values and correlation coefficients. Data were grouped together according to each faecal marker,Crohn's disease or ulcerative colitis,and paediatric compared with adult study populations. Studies included in this review assessed mucosal inflammation by endoscopic and/or histological means and compared these findings to faecal marker concentrations in inflammatory bowel diseases(IBD) patient cohorts. Articles had to be published between 1990 and February 2015 and written in English. Papers excluded from the review were those where the faecal biomarker concentration was compared between patients with IBD and controls or other disease groups,those where serum biomarkers were used,those with a heterogeneous study population and those only assessing post-operative disease. RESULTS: The available studies show that faecal markers,such as calprotectin and lactoferrin,are promising non-invasive indicators of mucosal healing. However,due to wide variability in study design,especially with regard to the definition of mucosal healing and evaluation of marker cut offs,the available data do not yet indicate the optimal roles of these markers. Thirty-six studies published between 1990 and 2014 were included. Studies comprised variable numbers of study participants,considered CD(15-164 participants) or UC(12-152 participants) separately or as a combined group(11-252 participants). Eight reports included paediatric patients. Several indices were used to document mucosal inflammation,encompassing elevenendoscopic and eight histologic grading systems. The majority of the available reports focused on faecal calprotectin(33 studies),whilst others assessed faecal lactoferrin(13 studies) and one study assessed S100A12. Across all of the biomarkers,there is a wide range of correlation describing the association between faecal markers and endoscopic disease activity(r values ranging from 0.32 to 0.87,P values ranging from < 0.0001 to 0.7815). Correlation coefficients are described in almost all studies and are used more commonly than outcome measures such as sensitivity,specificity,PPV and/or NPV. Overall,the studies that have evaluated faecal calprotectin and/or faecal lactoferrin and their relationship with endoscopic disease activity show inconsistent results. CONCLUSION: Future studies should report the results of faecal inflammatory markers in the context of mucosal healing with clear validated cut offs. | Gudula JAM Boon Andrew S Day Chris J Mulder Richard B Gearry | 2015 | World Journal of Gastroenterology2015，21，40： | 4 |
| 5 | Ego depletion, atten- tional control, and decision making in sport 显示文摘 | Philip F Alex B Chris E | 2013 | Psychol- ogy of Sport & Exercise2013，14，6： | 1 |
| 6 | New insights into magnetic derivatives for structural mapping显示文摘 | Verduzco B Fairhead J D G Chris M | 2004 | The Leading Edge2004，23，： | 1 |
| 7 | Characterization of JP-7 jet fuel degradation by the bacterium nocardioides luteus strain BAFB显示文摘 | CARINA M J CHRIS B | 2002 | J Basic Microbiol2002，42，2： | 1 |
| 8 | Progress in plant metabolic engineering显示文摘 | PIERRE B CHRIS S | 2001 | Proceeding of the National Academy of Sciences of the United States of America2001，98，16： | 1 |
| 9 | Immunostimulation in crustaceans:does it really protect against infection显示文摘 | VALERI J S JANET H B CHRIS HAUTON | 2003 | Fish & Shellfish Immunology2003，，15： | 1 |
| 10 | Satellite Formation Flying Design and Evolution 显示文摘 | Chris S Richard B McLaughlin C A | 2001 | Journal of Spacecraft and Rockets2001，38，2： | 1 |
| 11 | Staff Walking Program:a Quasi-Experimental Trial of M aintenance New sletters to M aintain Walking Follow ing a Pedometer Program显示文摘 | Janelle B Dafna M Chris R | 2010 | Health Promotion Journal of Austria2010，21，： | 1 |
| 12 | A fuzzy reasoning and fuzzy- analytical hierarchy process based approach to the process of railway risk information: A railway risk management system显示文摘 | Min An Yao Chen Chris J B | 2011 | Information Sciences2011，181，18： | 1 |
| 13 | Superoxide disutase and stress tolcrance显示文摘 | CHRIS B DIRK I | 1992 | Annu Roy Plant Physiol Plant Mol Bio11992，43，： | 1 |
| 14 | Femoral component revision with use of Impaction bone-Grafting and a cemented polished stem显示文摘 | B Willem Schreurs J Chris Arts | 2005 | Bone Joint Surg Am2005，87，： | 1 |
| 15 | Describing and Understanding Pa- cing Strategies during Athletic Competition 显示文摘 | CHRIS R A PAUL B L | 2008 | Sports Med2008，38，3： | 1 |
| 16 | Importance of grouting to enhance the performance of earth energy systems 显示文摘 | Lenarduzzi Frank J Cragg Chris B H Radhakrishna H S | 2000 | ASHRAE Transactions2000，106，： | 1 |
| 17 | Extreme Returns from Extreme Value Stocks: Enhancing the Value Premium显示文摘 | Keith A Chris B | 2007 | Journal of Investing2007，，4： | 1 |
| 18 | Using 3He/4He isotope ratios to identify the source of deep reservoir contributions to shallow fluids and soil gas显示文摘 | Sarah J M Chris J B | 2012 | Chemical Geology2012，，： | 1 |
| 19 | The effect of neoprene shorts on leg proprioception in Australian football players显示文摘 | MATTHEW L CAMERON ROGER D ADAMS CHRIS G MAHER B | 2008 | Journal of Science and Medicine in Sport2008，11，： | 1 |
| 20 | Perceptual hashing of video con-tent based on differential block similarity显示文摘 | Zhou X B Martin S Chris B | | 0，，： | 1 |
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