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Thermally stable ultrafine grained copper induced by CrB/CrB_(2) microparticles with surface nanofeatures via regular casting

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Journal of Materials Science & Technology 2020年第23期58卷 55-62页

作者： Gongcheng Yao Chezheng Cao Shuaihang Pan Jie Yuan igor de rosa Xiaochun Li department of Materials Science and Engineering University of CaliforniaLos AngelesCA 90095USA department of Mechanical and Aerospace Engineering University of CaliforniaLos AngelesCA 90095USA

Ultrafine-grained(UFG)/nanocrystalline materials possess novel properties. Refining as-solidified grains of metals to the ultrafine and even nanometer scale by nanoparticles via slow cooling has been recently discovered. Here, we report that microparticles(CrB and CrB_(2)) with surface nanofeatures can also enable ultrafine/nano grains via slow cooling. CrB/CrB_(2) microparticles, formed by coalescence of nanoparticles in Cu matrix, display surface nanofeatures, which induce substantial grain refinement and stabilization down to the ultrafine/nano scale. The UFG Cu/Cr B and Cu/CrB_(2) samples exhibit exceptional thermal stability, comparable to UFG Cu induced by nanoparticles, without coarsening after annealing at 600°C for 1 h. The microhardness, strengths, and Young's moduli of the Cu/Cr B and Cu/CrB_(2) samples are significantly enhanced over pure Cu. This discovery has great potential to advance the mass production UFG/nanocrystalline for widespread applications.

关键词： Copper Microparticles with nanofeatures Casting Ultrafine grains Thermal stability

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Fecal microbiota transplantation in patients with metabolic syndrome and obesity:A randomized controlled trial

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World Journal of Clinical Cases 2023年第19期11卷 4612-4624页

作者： Alberto Machado da Ponte Neto Aniele Cristine Ott Clemente Paula Waki rosa igor Braga Ribeiro Mateus Pereira Funari Gabriel Cairo Nunes Luana Moreira Luiz Gustavo Sparvoli Ramon Cortez Carla Romano Taddei Márcio C Mancini Eduardo Guimarães Hourneaux de Moura departament of Gastroenterology Faculdade de MedicinaUniversidade de Sao PauloServiço de Endoscopia Gastrointestinal do Hospital das Clínicas HCFMUSPSão Paulo 05403-010SPBrazil department of Endocrinology Hospital das ClínicasUniversity of São Paulo School of MedicineSão Paulo 05403-010SPBrazil department of Clinical and Toxicology Analysis School of Pharmaceutical SciencesUniversity of São PauloSão Paulo 05403-010SPBrazil School of Arts Science and HumanitiesUniversity of São PauloSão Paulo 05403-010SPBrazil

BACKGROUND Metabolic syndrome is a multifactorial disease,and the gut microbiota may play a role in its ***,especially abdominal obesity,is associated with insulin resistance,often increasing the risk of type two diabetes mellitus,vascular endothelial dysfunction,an abnormal lipid profile,hypertension,and vascular inflammation,all of which promote the development of atherosclerotic cardiovascular *** To evaluate the outcomes of fecal microbiota transplantation(FMT)in patients with metabolic *** This was a randomized,single-blind placebo-controlled trial comparing FMT and a sham procedure in patients with metabolic *** selected 32 female patients,who were divided into eight groups of four patients *** of the patients were submitted to upper gastrointestinal *** each group,two patients were randomly allocated to undergo FMT,and the other two patients received saline *** patients were followed for one year after the procedures,during which time anthropometric,bioimpedance,and biochemical data were *** patients also had periodic consultations with a nutritionist and an *** primary end point was a change in the gut *** There was evidence of a postprocedural change in microbiota composition in the patients who underwent FMT in relation to that observed in those who underwent the sham ***,we found no difference between the two groups in terms of the clinical parameters *** There were no significant differences in biochemical or anthropometric parameters,between the two groups ***,there were significant postprocedural differences in the microbiota composition between the placebo *** date,clinical outcomes related to FMT remain uncertain.

关键词： Fecal microbiota transplantation Metabolic syndrome Obesity Endoscopy Diabetes mellitus Endocrinology

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Tumor–stromal cross-talk modulating the therapeutic response in pancreatic cancer

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Hepatobiliary & Pancreatic Diseases International 2018年第5期17卷 461-472页

作者： Christopher C.M.Neumann Ellen von Horschelmann Anja Reutzel-Selke Elisabeth Seidel igor Maximilian Sauer Johann Pratschke Marcus Bahra rosa Bianca Schmuck department of Surgery Campus Charité Mitte Campus Virchow-KlinikumExperimental SurgeryCharité-Universitatsmedizin BerlinBerlinGermany Berlin Institute of Health Department of SurgeryCampus CharitéMitte and Campus Virchow-KlinikumAugustenburger Platz 113353 BerlinGermany

Background: Pancreatic ductal adenocarcinoma(PDAC) is a highly malignant solid tumor with a dismal prognosis. The stroma component makes up to 90% of the tumor mass and is thought to be one of the main reasons for the tumor’s high chemoresistance. Cancer associated fibroblasts(CAFs) have previously been identified to be the key stromal players. This is the first time we provide detailed in vitro experiments investigating tumor–stromal interactions when exposed to three well-known chemotherapeutic agents. Methods: Monocultures, indirect and direct co-cultures of two PDAC cell lines(AsPC and Panc-1) and six primary patients derived CAFs were treated with gemcitabine, nab-paclitaxel and the γ-secretaseinhibitor(GSI) DAPT. The cell viability of each component was measured with XTT. Finally, IL-6 concentrations of the supernatants were analyzed. Results: On the contrary to PDAC cell lines, CAF monocultures hardly responded to any treatment which suggested that stroma(CAFs) itself is more resistant to standard chemo-treatments than the epithelial cancer cells. Moreover, only a weak chemotherapeutic response was observed in direct co-cultures of cancer cells with CAFs. A change in the morphology of direct co-cultures was accompanied with the chemoresistance. CAFs were observed to build cage-like structures around agglomerates of tumor cells. High levels of IL-6 were also associated with a reduced response to therapy. Indirect co-cultures make the tumor–stromal interaction more complex. Conclusions: CAFs are highly chemoresistant. Direct cell–cell contact and high levels of IL-6 correlate with a high chemoresistance.

关键词： Pancreatic cancer Tumor microenvironment Cancer associated fibroblasts Cancer–stroma co-culture Atroma targeted therapy

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Influence of Fertilizer Type on Beet Production and Post-Harvest Quality Characteristic

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Agricultural Sciences 2018年第5期9卷 557-565页

作者： Carmen rosa da Silva Curvêlo Layane Hyasmin Bernardes Diniz Alexandre igor de Azevedo Pereira Luiz Leonardo Ferreira Goiano Federal Institute Campus Urutaí Urutaí Brasil University Center of Mineiros—UNIFIMES Mineiros Brasil

The beet (Beta vulgaris L.) vegetable is of great importance in the Brazilian market, mainly by having high nutritional values in consumer diet. Thus, the objective of this work was to evaluate the effects of organic and mineral fertilization on the production and post-harvest quality of beet. The experiment was conducted in the field, in the municipality of Urutaí-GO. The experimental design was a randomized block (DCB), where treatments were applied to two types of fertilizer: organic (chicken manure) and conventional (mineral fertilizer) with six replicates (using six tubers per plot). The following evaluations were made: horizontal and vertical diameters of the tubers (cm) weight (kg) Protein (g) Lipid (%) Ash humidity (%), electrical conductivity (μS·cm-1), pH, Titratable Acidity and Brix. The organic surpassed conventional treatment for all variables, except for the ash content, wherein the organic treating poultry litter base, showed 1.40% of ash and pH (6.48).

关键词： Beta vulgaris L. Chicken Bed Productivity

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No independent associations between physical activity and clinical outcomes among hospitalized patients with moderate to severe COVID-19

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Journal of Sport and Health Science 2021年第6期10卷 690-696页

作者： Ana J.Pinto Karla F.Goessler Alan L.Fernandes igor H.Murai Lucas P.Sales Bruna Z.Reis Mayara Diniz Santos Hamilton Roschel rosa M.R.Pereira Bruno Gualano Applied Physiology and Nutrition Research Group School of Physical Education and SportClinical Hospital HCFMUSPSchool of Medicine FMUSPUniversity of Sao PauloSao PauloSP 01246903Brazil Rheumatology Division Clinical Hospital HCFMUSPSchool of Medicine FMUSPUniversity of Sao PauloSao PauloSP 01246903Brazil Food Research Center University of Sao PauloSao PauloSP 05508080Brazil

Background:Regular physical activity(PA)has been postulated to improve,or at least maintain,immunity across the life ***,the link between physical(in)activity and coronavirus disease 2019(COVID-19)remains to be *** small-scale prospective cohort study is nested within a randomized controlled trial aimed to investigate the possible associations between PA levels and clinical outcomes among hospitalized patients with moderate to severe ***:Hospitalized patients with COVID-19(mean age:54.9 years)were recruited from the Clinical Hospital of the School of Medicine of the University of Sao Paulo(a quaternary referral teaching hospital)and from Ibirapuera Field Hospital,both located in Sao Paulo,*** level was assessed using the Baecke Questionnaire of Habitual Physical *** primary outcome was hospital length of *** secondary outcomes were mortality,admission to the intensive care unit(ICU),and mechanical ventilation ***:The median hospital length of stay was 7.0§4.0 days,median§IQR;3.3%of patients died,13.8%were admitted to the ICU,and 8.6%required mechanical *** linear regression models showed that PA indices were not associated with hospital length of stay(work index:b=-0.57(95%confidence interval(95%CI):-1.80 to 0.65),p=0.355;sport index:b=0.43(95%CI:-0.94 to 1.80),p=0.536;leisure-time index:b=1.18(95%CI:-0.22 to 2.59),p=0.099;and total activity index:b=0.20(95%CI:-0.48 to 0.87),p=0.563).None of the PA indices were associated with mortality,admission to the ICU,or mechanical ventilation requirement(all p>0.050).Conclusion:Among hospitalized patients with COVID-19,PA did not independently associate with hospital length of stay or any other clinically relevant *** findings should be interpreted as meaning that,among already hospitalized patients with more severe forms of COVID-19,being active is a potential protective factor likely outweighed by a cluster of comorbidities(e.

关键词： Hospital length of stay Lifestyle Physical inactivity Prognosis SARS-CoV-2

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Characterization of the Stem Cell Fraction in Pancreatobiliary Carcinomas: The Notch Signaling Pathway as a Potential Therapeutic Target

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Journal of Cancer Therapy 2018年第6期9卷 480-502页

作者： Elisabeth Seidel Cynthia de Carvalho Fischer Christopher Neumann Anja Reutzel-Selke Andreas Andreou Joseph Gassner Julia Gogolok Peter Tang Anja Schirmeier Fritz Klein igor M. Sauer Johann Pratschke Marcus Bahra rosa B. Schmuck Charité—Universitatsmedizin Berlin Corporate Member of Freie Universitat Berlin Humboldt-Universitatzu Berlin and Berlin Institute of Health Institute of Surgery Augustenburger Platz 1 Berlin Germany

Pancreatic adenocarcinoma (PDAC) and extrahepatic cholangiocarcinoma (ECC) are highly lethal malignancies with limited treatment options. Both a small subpopulation of cancer stem cells (CSC) and the deregulation of the notch pathway have been considered potential sources of tumor formation. In this study, flow cytometry (FCM) was conducted to identify the CSC population and Notch-associated proteins in ECC and PDAC cell lines. Additionally, the treatment effect of Gemcitabine and the specific notch-inhibitor DAPT on ECC and PDAC cell lines was evaluated. Our results show that the amount of SP cells in ECC cell lines is significantly higher than in PDAC cell lines, and that SP-ECC cells show a higher sensitivity to therapy. In conclusion, inhibition of Notch signaling with DAPT may be of therapeutic value in ECC, but seems to show no effect on more aggressive PDAC. As it could be essential for the improvement in outcomes of the ECC patients, other trials are needed to determine the role of further Notch components.

关键词： Notch Pathway Cancer Stem Cells Pancreatic Adenocarcinoma Extrahepatic Cholangiocarcinoma Targeted Therapy

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