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Ray Wu's Golden Rules:How he achieved greatness in work,and in life

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Science China(Life Sciences) 2009年第2期52卷 101-107页

作者： Albert W. Wu christina C. Wu Diana K. Sugg Health Policy and Management at the Johns Hopkins Bloomberg School of Public Health

Overview When Ray Wu passed away on February 10, 2008, he was 79, working full-time in his lab at Cornell University, and was at or near the top of his long and noteworthy career. He had developed the first method for DNA sequencing and pioneered recombinant DNA technology. He had identified key genes related to stress tolerance in plants and was poised to apply these to boost crop yields of rice and

关键词： work Figure

Influence of age in estimating maximal oxygen uptake

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Journal of Geriatric Cardiology 2016年第2期13卷 126-131页

作者： christina G de Souza Silva Barry A Franklin Daniel E Forman Claudio Gil S Araujo Heart Institute Edson Saad and Medical School Federal University of Rio de Janeiro Rio de Janeiro R J Brazil Exercise Medicine Clinic CLINIMEX Rio de Janeiro R J Brazil Preventive Cardiology and Cardiac Rehabilitation William Beaumont Hospital Royal Oak MI United States Section of Geriatric Cardiology University of Pittsburgh Medical Center Geriatrics Research Education and Clinical Center System University of Pittsburgh Pittsburgh PA USA

Objective To assess the influence of age on the error of estimate （EE） of maximal oxygen uptake （VO2max） using sex and population specific-equations in cycle ergometer exercise testing, since estimated VO2 max is associated with a substantial EE, often exceeding 20%, possibly due to intrinsic variability of mechanical efficiency. Methods 1850 adults （68% men）, aged 18 to 91 years, underwent maximal cycle ergometer cardiopulmonary exercise testing. Cardiorespiratory fitness （CRF） was assessed relative to sex and age [younger （18 to 35 years）, middle-aged （36 to 60 years） and older （〉 60 years）]. VO2max [mL.（***）-1] was directly measured by assessment of gas exchange and estimated using sex and population specific-equations. Measured and estimated values of VO2max and related EE were compared among the three age- and sex-specific groups. Results Directly measured VO2max of men and women were 29.5 ± 10.5 mL.（***）-1 and 24.2 ± 9.0 mL.（kg·min） -1 （P 〈 0.01）. EE [mL·（kg·min）-1] and percent errors （%E） for men and women had similar values, 0.5 ± 3.2 and 0.4 ± 2.9 mL·（kg·min）-1, and -0.8 ± 13.1% and -1.7 ± 15.4% （P 〉 0.05）, respectively. EE and %E for each age-group were, respectively, for men： younger = 1.9 ± 4.1 mL·（kg·min）-1 and 3.8 ± 10.5%, middle-aged = 0.6 ± 3.1 mL.（kg·min）-1 and 0.4 ± 10.3%, older = -0.2 ± 2.7 mL·（kg·min） -1 and -4.2 ± 16.6% （P 〈 0.01）; and for women： younger = 1.2 ± 3.1 mL.（***）-1 and 2.7 ±10.0%, middle-aged = 0.7 ± 2.8 mL·（kg·min）-1 and 0.5 ± 11.1%, older = -0.8 ± 2.3 mL-（kg·min）-1 and -9.5 ± 22.4% （P 〈 0.01）. Conclusion VO2max were underestimated in younger age-groups and were overestimated in older age groups. Age significantly influences the magnitude of the EE of VO2max in both men and women and should be considered when CRF is estimated using population specific equations, rather than directly measured.

关键词： Aging Cardiopulmonary exercise testing Error of measurement

Identification of differentially expressed genes after partial rat liver ischemia/reperfusion by suppression subtractive hybridization

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World Journal of Gastroenterology 2005年第9期11卷 1303-1316页

作者： Christine Fallsehr christina Zapletal Michael Kremer Resit Demir Magnus von Knebel Doeberitz Ernst Klar Institute of Molecular Pathology Department of Surgery

AIM: To identify potential diagnostic target genes in early reperfusion periods following warm liver ischemia before irreversible liver damage occurs. METHODS: We used two strategies (SSH suppression subtractive hybridization and hybridization of cDNA arrays) to determine early changes in gene expression profiles in a rat model of partial WI/R, comparing postischemic and adjacent nonischemic liver lobes. Differential gene expression was verified (WI/R; 1 h/2 h) and analyzed in more detail after warm ischemia (1 h) in a reperfusion time kinetics (0, 1, 2 and 6 h) and compared to untreated livers by Northern blot hybridizations. Protein expression was examined on Western blots and by immunohistochemistry for four differentially expressed target genes (Hsp70, Hsp27, Gadd45a and IL-1rI). RESULTS: Thirty-two individual WI/R target genes showing altered RNA levels after confirmation by Northern blot analyzes were identified. Among them, six functionally uncharacteristic expressed sequences and 26 known genes (12 induced in postischemic liver lobes, 14 with higher transcriptional expression in adjacent nonischemic liver lobes). Functional categories of the verified marker genes indicate on the one hand cellular stress and tissue damage but otherwise activation of protective cellular reactions (AP-1 transcription factors, apoptosis related genes, heat shock genes). In order to assign the transcriptional status to the biological relevant protein level we demonstrated that Hsp70, Hsp27, Gadd45a and IL-1rI were clearly up-regulated comparing postischemic and untreated rat livers, suggesting their involvement in the WI/R context. CONCLUSION: This study unveils a WI/R response gene set that will help to explore molecular pathways involved in the tissue damage after WI/R. In addition, these genes especially Hsp70 and Gadd45a might represent promising new candidates indicating WI/R liver damage.

关键词： Organ injury Liver ischemia AP-1 transcription factor Heat shock protein Gadd45A Suppression subtractive hybridization

Evidence for the Role Evolutionary Increase Yield in Cotton of Transfer Cells in the in Seed and Fiber Biomass

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Molecular Plant 2010年第6期3卷 1075-1086页

作者： Deborah A. Pugh christina E. Offler Mark J. Talbot Yong-Ling Ruan School of Environmental and Life Sciences University of Newcastle Callaghan NSW 2308 Australia Australia-China Research Centre for Crop Improvement University of Newcastle Callaghan NSW 2308 Australia CSIRO Plant Industry Canberra ACT 2601 Australia

Transfer cells （TCs） are specialized cells exhibiting invaginated wall ingrowths （Wls）, thereby amplifying their plasma membrane surface area （PMSA） and hence the capacity to transport nutrients. However, it remains unknown as to whether TCs play a role in biomass yield increase during evolution or domestication. Here, we examine this issue from a comparative evolutionary perspective. The cultivated tetraploid AD genome species of cotton and its A and D genome diploid progenitors displayed high, medium, and low seed and fiber biomass yield, respectively. In all three species, cells of the innermost layer of the seed coat juxtaposed to the filial tissues trans-differentiated to a TC morphology. Electron microscopic analyses revealed that these TCs are characterized by sequential formation of flange and reticulate Wls during the phase of rapid increase in seed biomass. Significantly, TCs from the tetraploid species developed substantially more flange and reticulate Wls and exhibited a higher degree of reticulate WI formation than their progenitors. Consequently, the estimated PMSA of TCs of the tetraploid species was about 4 and 70 times higher than that of TCs of the A and D genome progenitors, respectively, which correlates positively with seed and fiber biomass yield. Further, TCs with extensive Wls in the tetraploid species had much stronger expression of sucrose synthase, a key enzyme involved in TC Wl formation and function, than those from the A and D progenitors. The analyses provide a set of novel evidence that the development of TC Wls may play an important role in the increase of seed and fiber biomass yield through polyploidization during evolution.

关键词： Callose cell wall cellulose cotton fiber evolution polyploidization seed development sucrose synthase transfer cell.

Risk of Cardiovascular Events in Patients with Primary Biliary Cholangitis-Systematic Review

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Journal of Clinical and Translational Hepatology 2018年第2期6卷 119-126页

作者： Duminda Suraweera christina Fanous Melissa Jimenez Myron J.Tong Sammy Saab Department of Medicine Olive-View Medical CenterSylmarCAUSA Department of Surgery at the University of California at Los Angeles Los AngelesCAUSA Huntington Research Institute PasadenaCAUSA Department of Medicine at the University of California at Los Angeles Los AngelesCAUSA

Background and Aims:Hypercholesterolemia is a common finding in patients with primary biliary cholangitis(PBC)and is a well-defined risk factor for cardiovascular ***,studies have been mixed on whether PBC patients do,in fact,have higher cardiovascular *** aim of this study is to review the current literature and provide an evidence-based assessment of cardiovascular risk in PBC ***:We performed a systematic literature search on PubMed re-garding patients with PBC and cardiovascular events from the database inception to July 1,2017.A total of 33 articles ful-filling our inclusion criteria were ***:The majority of the studies evaluated yielded no statistically significant dif-ference in cardiovascular disease in the PBC population com-pared to the general ***,some reports found a statistically significantly increase in coronary artery *** studies have looked at the specific lipid profile of pa-tients with PBC with *** these lipid ab-normalities differ by stage of disease,there is evidence to suggest that the specific lipid profile in PBC may have lower atherogenicity than in patients with hypercholesterolemia without *** looking at patients with PBC with other risk factors for cardiovascular disease,such as hypertension and metabolic syndrome,have consistently found a higher risk for cardiovascular disease in these *** treat-ment is effective in reducing lipid levels and possibly improv-ing endothelial inflammation in patients with PBC with ***:There is not enough evidence to suggest an increased risk of cardiovascular dis-ease in patients with PBC with hypercholesterolemia,except for those individuals with concomitant features of metabolic *** patients with PBC with no additional cardiovas-cular risk factors,individual risk/benefit discussion on lipid-lowering treatment should be considered.

关键词： Primary biliary cholangitis(PBC) Cardiovascular risk Hypercholesterolemia

Sustained treatment response of metastatic hepatocellular carcinoma with bevacizumab and sorafenib

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World Journal of Gastroenterology 2010年第28期16卷 3592-3596页

作者： christina Wich Abbas Agaimy Deike Strobel Thaddaus Till Wissniowski Arndt Hartmann Matthias Ocker Department of MedicineⅠ University Hospital ErlangenUlmenweg 1891054 ErlangenGermany Department of Pathology University Hospital ErlangenKrankenhausstr.1291054 ErlangenGermany Institute for Surgical Research Philipps University MarburgBaldingerstrasse35033 MarburgGermany

The overall survival for patients with advanced hepatocellular carcinoma(HCC)is still *** the multi-kinase inhibitor sorafenib has recently been approved for this disease,response rates are still low and patients often face dose-limiting toxicities which lead to a reduction in prognosis and treatment *** here report a patient with metastasized HCC who shows a sustained response for more than 30 mo to sorafenib therapy after failure of a first line therapy with gemcitabine,oxaliplatin and bevacizumab.

关键词： Hepatocellular carcinoma Sorafenib Bevacizumab Angiogenesis

Chemical modifications of proteins and their applications in metalloenzyme studies

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Synthetic and Systems Biotechnology 2021年第1期6卷 32-49页

作者： Nathchar Naowarojna Ronghai Cheng Juan Lopez christina Wong Lu Qiao Pinghua Liu Department of Chemistry Boston UniversityBostonMA02215United States

Protein chemical modifications are important tools for elucidating chemical and biological functions of *** strategies have been developed to implement these modifications,including enzymatic tailoring reactions,unnatural amino acid incorporation using the expanded genetic codes,and recognition-driven *** technologies have been applied in metalloenzyme studies,specifically in dissecting their mechanisms,improving their enzymatic activities,and creating artificial enzymes with non-natural ***,we summarize some of the recent efforts in these areas with an emphasis on a few metalloenzyme case studies.

关键词： Metalloenzymes Biorthogonal reactions Protein engineering Non-canonical amino acids Biocatalysis

Smart dental materials for antimicrobial applications

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Bioactive Materials 2023年第6期24卷 1-19页

作者： Carolina Montoya Lina Roldan Michelle Yu Sara Valliani christina Ta Maobin Yang Santiago Orrego Department of Oral Health Sciences Kornberg School of DentistryTemple UniversityPhiladelphiaPAUSA Bioengineering Research Group(GIB) Universidad EAFITMedellínColombia Department of Endodontology Kornberg School of DentistryTemple UniversityPhiladelphiaPAUSA Bioengineering Department College of EngineeringTemple UniversityPhiladelphiaPAUSA

Smart biomaterials can sense and react to physiological or external environmental stimuli(e.g.,mechanical,chemical,electrical,or magnetic signals).The last decades have seen exponential growth in the use and development of smart dental biomaterials for antimicrobial applications in *** biomaterial systems offer improved efficacy and controllable bio-functionalities to prevent infections and extend the longevity of dental *** review article presents the current state-of-the-art of design,evaluation,advantages,and limitations of bioactive and stimuli-responsive and autonomous dental materials for antimicrobial ***,the importance and classification of smart biomaterials are ***,the categories of bioresponsive antibacterial dental materials are systematically itemized based on different stimuli,including pH,enzymes,light,magnetic field,and *** each category,their antimicrobial mechanism,applications,and examples are ***,we examined the limitations and obstacles required to develop clinically relevant applications of these appealing technologies.

关键词： Antimicrobial Antibacterial Antifungal Smart dental materials Bioresponsive biomaterials Stimuli-responsive Restorative dentistry Biofilm Antibiofilm Bioactive

Liver transplantation for malignancy:current treatment strategies and future perspectives

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World Journal of Gastroenterology 2014年第18期20卷 5331-5344页

作者： christina Hackl Hans J Schlitt Gabriele I Kirchner Birgit Knoppke Martin Loss Department of Surgery University Hospital Regensburg93053 RegensburgGermany Department of Internal Medicine I University Hospital Regensburg93053 RegensburgGermany Department of Pediatrics and Juvenile Medicine University Hospital Regensburg93053 RegensburgGermany

In 1967,Starzl et al performed the first successful liver transplantation for a patient diagnosed with *** the following,liver transplantation was considered ideal for complete tumor resection and potential cure from primary hepatic *** reports of liver transplantation for primary and metastatic liver cancer however showed disappointing results and the strategy was soon ***1996,Mazzaferro et al introduced the Milan criteria,offering liver transplantation to patients diagnosed with limited hepatocellular *** then,liver transplantation for malignant disease is an ongoing subject of preclinical and clinical *** this context,several aspects must be considered:(1)Given the shortage of deceased-donor organs,long-term overall and disease free survival should be comparable with results obtained in patients transplanted for nonmalignant disease;(2)In this regard,living-donor liver transplantation may in selected patients help to solve the ethical dilemma of optimal individual patient treatment vs organ allocation justice;and(3)Ongoing research focusing on perioperative therapy and antiproliferative immunosuppressive regimens may further reduce tumor recurrence in patients transplanted for malignant disease and thus improve overall *** present review gives an overview of current indications and future perspectives of liver transplantation for malignant disease.

关键词： Hepatocellular Fibrolamellar Carcinoma Cholangiocellular Hepatoblastoma Liver metastases