检索结果-南通市图书馆

5-fluorouracil dose escalation generated desensitized colorectal cancer cells with reduced expression of protein methyltransferases and no epithelial-to-mesenchymal transition potential

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Oncology Research 2024年第6期32卷 1047-1061页

作者： kimberly fENECH ISAAC MICALLEf BYRON BARON Centre for Molecular Medicine and Biobanking University of MaltaMsidaMSD 2080Malta department of Tumor Genetics and Biology Graduate School of Medical SciencesFaculty of Life SciencesKumamoto UniversityKumamoto860-8556Japan

Background:Colorectal cancer(CRC)is one of the most frequently diagnosed *** many cases,the poor prognosis of advanced CRC is associated with resistance to treatment with chemotherapeutic drugs such as 5-fluorouracil(5-fU).The epithelial-to-mesenchymal transition(EMT)and dysregulation in protein methylation are two mechanisms associated with chemoresistance in many *** study looked into the effect of 5-fU dose escalation on EMT and protein methylation in *** and Methods:HCT-116,Caco-2,and dLd-1 CRC cell lines were exposed to dose escalation treatment of *** motility and invasive potentials of the cells before and after treatment with 5-fU were investigated through wound healing and invasion *** was followed by aWestern blot which analyzed the protein expressions of the epithelial marker E-cadherin,mesenchymal marker vimentin,and the EMT transcription factor(EMTTf),the snail family transcriptional repressor 1(Snail)in the parental and desensitized *** blotting was also conducted to study the protein expressions of the protein methyltransferases(PMTs),Euchromatic histone lysine methyltransferase 2(EHMT2/G9A),protein arginine methyltransferase(PRMT5),and SET domain containing 7/9(SETd7/9)along with the global lysine and arginine methylation ***:The dose escalation method generated 5-fU desensitized CRC cells with distinct morphological features and increased tolerance to high doses of *** 5-fU desensitized cells experienced a decrease in migration and invasion when compared to the parental *** was reflected in the observed reduction in E-cadherin,vimentin,and Snail in the desensitized cell ***,the protein expressions of EHMT2/G9A,PRMT5,and SETd7/9 also decreased in the desensitized cells and global protein lysine and arginine methylation became dysregulated with 5-fU ***:This study showed that continuous,dose-escalation treatment of 5-fU in CRC cells generated 5-fU

关键词： Chemoresistance Epithelial-to-mesenchymal transition Protein methylation Protein methyltransferases

Cost-Effective Method of Gene Synthesis by Sequencing from Microchip-derived Oligos for droplet Cloning

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advances in Bioscience and Biotechnology 2024年第8期15卷 474-485页

作者： kimberly Wang Jericho Senior High School Jericho NY USA

Gene synthesis has provided important contributions in various fields including genomics and medicine. Current genes are 7 - 30 cents depending on the assembly and sequencing methods performed. demand for gene synthesis has been increasing for the past few decades, yet available methods remain expensive. A solution to this problem involves microchip-derived oligonucleotides (oligos), an oligo pool with a substantial number of oligo fragments. Microchips have been proposed as a tool for gene synthesis, but this approach has been criticized for its high error rate during sequencing. This study tests a possible cost-effective method for gene synthesis utilizing fragment assembly and golden gate assembly, which can be employed for quicker manufacturing and efficient execution of genes in the near future. The droplet method was tested in two trials to determine the viability of the method through the accuracy of the oligos sequenced. A preliminary research experiment was performed to determine the efficacy of oligo lengths ranging from two to four overlapping oligos through Gibson assembly. Of the three oligo lengths tested, only two fragment oligos were correctly sequenced. Two fragment oligos were used for the second experiment, which determined the efficacy of the droplet method in reducing gene synthesis cost and speed. The first trial utilized a high-fidelity polymerase and resulted in 3% correctly sequenced oligos, so the second trial utilized a non-high-fidelity polymerase, resulting in 8% correctly sequenced oligos. After calculating, the cost of gene synthesis lowers down to 0.8 cents/base. The final calculated cost of 0.8 cents/base is significantly cheaper than other manufacturing costs of 7 - 30 cents/base. Reducing the cost of gene synthesis provides new insight into the cost-effectiveness of present technologies and protocols and has the potential to benefit the fields of bioengineering and gene therapy.

关键词： Cost-Effective Gene Synthesis Microchip Oligo droplet Cloning

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

模板下擦拭：SMT的一个盲点

中国电子商情（空调与冷冻） 2005年第4期 34-36页

作者： kimberly f.abbett michael d.jones dupont杜邦公司高级工程师 MiCro Care公司副总裁

复杂的漏印模板印刷工艺是SMT生产的核心工艺。在这一工艺过程中要采用超过39种以上的变量加以优化，因而全部缺陷的50～90％发生在模板印刷机上，就不足为怪了。不过，更换模板卷纸可以提高生产率。本文对三类模板纸卷进行比较，并提... 详细信息

复杂的漏印模板印刷工艺是SMT生产的核心工艺。在这一工艺过程中要采用超过39种以上的变量加以优化，因而全部缺陷的50～90％发生在模板印刷机上，就不足为怪了。不过，更换模板卷纸可以提高生产率。本文对三类模板纸卷进行比较，并提出了改进措施。

关键词： SMT生产漏印模板盲点擦拭印刷工艺模板印刷机工艺过程高生产率改进措施

Key factors to Consider When Introducing a New Vaccine in Low-Income Settings: Lessons from Malawi Expanded Program on Immunization

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Vaccines 2024年第1期14卷 1-23页

作者： Samuel Mpinganjira kimberly Konono Joseph Mwaka Adidja Amani Habtamu Anteneh michael Ngigi Boston Zimba Atupele Kapito Institute for Global Health Santa Chiara Lab Universita degli Studi di Siena Siena Italy School of Public and Global Health Kamuzu University of Health Sciences Blantyre Malawi faculty of Medicine and Biomedical Sciences of the University of Yaound 1 Yaound Cameroon department of Public Health University of Glasgow Glasgow UK

Introduction: As new vaccines become available, countries must assess the relevance to introduce them into their vaccination schedules. Malawi has recently introduced several new vaccines and plans to introduce more. This study was conducted to identify key factors that need to be considered when deciding to introduce a new vaccine and current challenges faced by low and middle income countries using Malawi as an example. Methodology: The study employed a desk review approach, examining published literature from various sources such as PubMed, Medline, and Google Scholar. Policy documents from organizations like the World Health Organization, GAVI the Alliance, and the Ministry of Health for Malawi were also included. A total of 99 articles and documents on new vaccine introduction, challenges of immunization, policy documents in immunization and health systems strengthening were included. The review focused on addressing five key areas critical to new vaccine introduction namely: the need for a vaccine, availability of the vaccine, safety and effectiveness of the vaccine, demand for the vaccine, and the prudent use of public or private funds. Results: Malawi considered the burden of cervical cancer and the significance of malaria in the country when introducing the HPV and malaria vaccines. The country opted for vaccines that can be handled by the cold chain capacity and available human resources. despite that malaria vaccine and Typhoid Conjugate Vaccine trials were done in country, there are limited vaccine safety and efficacy trials conducted in Malawi, leading to a reliance on WHO-prequalified vaccines. demand for newly introduced vaccines varied, with high demand for Oral Cholera Vaccine during a cholera outbreak, while demand for COVId-19 vaccines decreased over time. Although cost-effectiveness studies were limited in the country, 2 studies indicated that Typhoid Conjugate Vaccine and malaria vaccine would be cost effective. All these have been implemented d

关键词： Vaccine Introduction Implementation Expanded Program on Immunization Low-Income Stakeholders

The Role of Impulsivity and Addiction in Gambling Behaviors: How Applied Neuroscience Research Can Help in the Monitoring and Management of Mental Health Issues

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Open Journal of Medical Psychology 2024年第1期13卷 11-24页

作者： Yingzhen Jia kimberly Rose Clark College of Arts and Sciences Boston University Boston MA USA department of Psychological and Brain Sciences Dartmouth College Hanover NH USA

One in five Americans experience symptoms associated with at least one mental health disorder every year. These include behavioral addictions, which have long been overlooked despite their similar neural bases with substance addictions. Gambling addiction, a type of behavioral addiction, deserves particular attention given the significant negative effects, this addiction has on financial and interpersonal health. The purpose of this paper is to review the available literature concerning the behavioral and neural processes involved in gambling addiction, including: the anticipation of reward, the role of dopamine, and the neural substrates of the decision-making processes involved in gambling addiction. Market research has also identified solutions that integrate applied neuroscience and self-tracking systems to monitor and manage mental health issues associated with gambling addiction. The authors then propose a gambling treatment-focused mobile app solution that addresses outstanding issues with a special design aimed at reversing plasticity in order to relieve the effects of gambling addiction. .

关键词： Applied Neuroscience Gambling Addiction Mental Health Management

Neurocircuit regeneration by extracellular matrix reprogramming

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第8期20卷 2300-2301页

作者： Shengzhang Su Ian N.Levasseur kimberly M.Alonge department of Medicinal Chemistry University of WashingtonSeattleWAUSA department of Chemistry University of WashingtonSeattleWAUSA department of Medicine University of Washington Medicine Diabetes InstituteSeattleWAUSA

The brain's extracellular matrix(ECM),which is comprised of protein and glycosaminoglycan(GAG)scaffolds,constitutes 20%-40% of the human brain and is considered one of the largest influencers on brain cell functioning(Soles et al.,2023).Synthesized by neural and glial cells,the brain's ECM regulates a myriad of homeostatic cellular processes,including neuronal plasticity and firing(Miyata et al.,2012),cation buffering(Moraws ki et al.,2015),and glia-neuron interactions(Anderson et al.,2016).Considering the diversity of functions,dynamic remodeling of the brain's ECM indicates that this understudied medium is an active participant in both normal physiology and neurological diseases.

关键词： matrix programming

Temporal variability and sources of PfAS in the Rio Grande,New Mexico through an arid urban area using multiple tracers and highfrequency sampling

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Emerging Contaminants 2024年第3期10卷 205-220页

作者： kimberly R.Beisner Rebecca E.Travis david A.Alvarez Larry B.Barber Jacob A.fleck Jeramy R.Jasmann U.S.Geological Survey 6700 Edith Blvd NEAlbuquerqueNM87113USA U.S.Geological Survey 4200 New Haven RoadColumbiaMO65201USA U.S.Geological Survey 3215 Marine St.BoulderCO80303USA U.S.Geological Survey 6000 J St.Placer Hall.SacramentoCA95819USA

Per-and polyfluoroalkyl substances(PfAS)are ubiquitous in the environment but sources are not well defined for temporal and spatial aspects within an urban environment,and especially for an arid urban environment subject to seasonal short term high-intensity precipitation events.A focused diel sampling was conducted in the summer of 2021 to assess the temporal and spatial variability of PfAS in the Rio Grande near Albuquerque,New Mexico and showed an order of magnitude increase of PfAS as it flows through the Albuquerque urban *** samples were collected at two different locations on the Rio Grande in addition to wastewater treatment plant(WWTP)effluent that discharges directly to the Rio Grande between the sampling ***-term high-intensity precipitation events occurred during the study period and mobilized PfAS from urban *** organic matter composed of tryptophan-like organic substances and refined fuel and fuel byproducts,characteristic of an urban signature,were also related to the precipitation *** PfAS in discharge from the WWTP was consistent over a 24-h period with slight differences in some *** presence on the Rio Grande downstream of the WWTP was evidenced by a gadolinium anomaly as well as increases in several other trace elements,total dissolved nitrogen,and fluorescence indicators,in addition to *** varied depending on source contribution,where urban runoff was associated with PfOA,PfOS,and PfBA,whereas PfHxA and PfPeA were associated with wastewater *** addition,passive polar organic chemical integrative samplers(POCIS)using hydrophilic-lipid balance(HLB)sorption media were deployed for a month at two locations on the Rio Grande to assess longer term PfAS *** POCIS results show some compounds(PfPeA and PfHpA)were greater than the average concentration from discrete samples,whereas other compounds(PfHxA,PfOA,PfdA,and PfNA)were lower in the POCIS,and PfOS was very simila

关键词： wastewater Rio runoff

Citrobacter Causing Septic Arthritis: A Case Report

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Infectious diseases & Immunity 2024年第3期4卷 146-148页

作者： kimberly K.Levine Mary dahl Abubakar Tauseef Joseph Thirumalareddy department of Internal Medicine Creighton University School of MedicineOmaha 68124NEUSA

The genus Citrobacter commonly found in water and soil as well as the intestinal and urinary tracts of animals and *** Citrobacter infections are infrequently diagnosed in environmental contexts,the rising incidence of nosocomial manifestations underscores the importance of considering this organism in the differential diagnosis of hospital-acquired *** present a case of patient with septic arthritis of the shoulder who had been originally admitted for the management of acute-on-chronic congestive heart failure exacerbation and severe *** hospital day 1,joint aspiration cultures and Gram stain confirmed the presence of Citrobacter koseri,a pathogen not commonly associated with septic arthritis,and ceftriaxone was administered to target *** hospital day 7,antibiotic was transitioned to levofloxacin,every other day for 4 *** patient was discharged to an acute rehabilitation facility after a 14-day hospital *** case stresses the importance of maintaining a broad differential diagnosis for any patients who present with fever and joint inflammation or swelling,especially in a postoperative setting.

关键词： Citrobacter koseri Bacteremia Septic arthritis

A Case Report: Emergency Management of a Pregnant Trauma Patient—An Anesthesiologist’s Perspective and Role

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Open Journal of Anesthesiology 2024年第2期14卷 25-39页

作者： Kalpana Tyagaraj Candice Ibarra kimberly Moy Nina Luksanapol Gianna Torre Raymond Powers Anuj Bapodra Maimonides Medical Center New York USA

Trauma is the leading cause of death for all women of childbearing age. Motor vehicle accidents account for almost two-thirds of all maternal non-obstetric, trauma-related deaths, while falls and domestic violence comprise a large percentage of the rest. The leading causes of obstetric trauma are motor vehicle accidents, falls, assaults, and gunshots, and ensuing injuries are classified as blunt abdominal trauma, pelvic fractures, or penetrating trauma . The causes are different with different life styles and different socio-economic and cultural background. Pregnant trauma victims tend to be younger, less severely injured, and more likely African American or of Hispanic descent compared with nonpregnant victims of trauma. drugs and alcohol are a factor in about 20 percent of maternal trauma. With pregnancy comes the challenge and responsibility of caring for two patients at once, the mother and the fetus. In general, providing optimal maternal care is the best strategy to optimize fetal survival. decision-making including the condition of the mother, gestational age, status of the fetus, and interventions are based on these key factors. Many providers are involved in the care of the pregnant patient: at the trauma scene, in the emergency department, and in the operating room. The anesthesiologist plays a key role in the care and management of the pregnant trauma patient. All anesthesiologists have ample training in obstetric anesthesia during their residency and frequently cover obstetric units in hospitals where pregnant patients are cared for. On the other hand, most nonobstetric physicians have little obstetric exposure and may be uncomfortable caring for the pregnant patient because of unfamiliarity with the physiologic changes of pregnancy or the evaluation of fetal well-being. This is not only a source of stress for other trauma providers, but can put maternal well-being at risk. Non-obstetric physicians may hesitate to order necessary diagnostic and therapeu

关键词： Obstetric Anesthesiology Ob Trauma Maternal and fetal Resuscitation