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Hepatobiliary Surgery and Nutrition 2018年第2期7卷 147-148页

作者： markus rentsch Tobias S.Schiergens Department of General VisceralVascularand Transplant SurgeryMedical Center of the University of MunichMunichGermany

Aggressive treatments of metastasized colorectal cancer have been shown to be promising strategies,offering survival probabilities between 40%and 50%in selected patients(1,2).These achievements,however,were only possible on the basis of improvements in surgical techniques and the introduction of potent chemotherapeutic and biological drugs,combined in meticulously defined regimens(2).Naturally,this requires multidisciplinary teamwork and individually tailored therapeutic *** factors influence this individualized decision process,such as the quality and interpretation of imaging,the availability of a portfolio of systemic and locally ablative treatment options besides surgery,the availability of innovative treatment options within clinical studies,and last but not least,the experience of all health care professionals involved in the various treatment steps,in particular the surgeons(2,3).Several surgical concepts have been proposed in the past to address metastatic disease at two sites in patients with synchronously metastasized colorectal cancer,such as the liver-first approach,simultaneous resection of the primary and synchronous liver metastases,two-step liver resection,or the conventional colon/rectum-first and liver-second approach—with or without systemic chemotherapy.

关键词： patients colorectal metastases

5-Fluorouracil-related enhancement of adenoviral infection is Coxsackievirus-adenovirus receptor independent and associated with morphological changes in lipid membranes

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World Journal of Gastroenterology 2006年第32期12卷 5168-5174页

作者： Chiara Cabrele Mandy Vogel Pompiliu Piso markus rentsch Josef Schroder Karl W Jauch Hans J Schlitt Alexander Beham Department of Surgery Clinic of the Regensburg University Franz-Josef-Strauss-Allee 11D-93053RegensburgGermany

AIM： To evaluate the mechanism underlying the effects of 5-Fluorouracil （5-FU） on adenoviral infection. METHODS： Low and high Coxsackievirus-Adenovirus Receptor （CAR） expressing human colon carcinoma cell lines were treated with 5-FU and two El-deleted adenoviral constructs, one transferring GFP （Ad/CMV- GFP） the other bax （Ad/CEA-bax）. The number of infected cells were monitored by GFP expression. To evaluate the effects of 5-FU in a receptor free system, Ad/GFP were encapsulated in liposomes and treated with 5-FU. Ad/GFP release was estimated with PCR and infection of 293 cells with the supernatant. Electron microscopy of the Ad5-GFP-liposome complex was made to investigate morphological changes of the liposomes after 5-FU. RESULTS： Infection rates of all cell lines increased from 50% to 98% with emerging 5-FU concentrations. The enhanced viral uptake was independent of the CAR expression. Additionally, 5-FU treated liposomes released 2-2.5 times more adenoviruses. Furthermore, 5-FU- treated liposomes appeared irregular and porous-like. CONCLUSION： adenoviral uptake is enhanced in the presence of 5-FU irrespective of CAR and is associated with morphological changes in membranes making the combination of both a promising option in gene therapy.

关键词： 5-Fluorouracil Coxsackievirus-adenovirusreceptor Adenoviral infection Gene therapy

Nutrient restriction-activated Fra-2 promotes tumor progression via IGF1R in miR-15a downmodulated pancreatic ductal adenocarcinoma

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Signal Transduction and Targeted Therapy 2024年第3期9卷 1132-1146页

作者： Gian Luca Rampioni Vinciguerra Marina Capece Luca Reggiani Bonetti Giovanni Nigita Federica Calore Sydney rentsch Paolo Magistri Roberto Ballarin Fabrizio Di Benedetto Rosario Distefano Roberto Cirombella Andrea Vecchione Barbara Belletti Gustavo Baldassarre Francesca Lovat Carlo M.Croce Department of Cancer Biology and Genetics and Comprehensive Cancer Center The Ohio State UniversityColumbus 43210 OHUSA Department of Clinical and Molecular Medicine Faculty of Medicine and PsychologySant’Andrea HospitalUniversity of Rome“Sapienza”Rome 00189Italy Department of Diagnostic Clinic and Public Health MedicineUniversity of Modena and Reggio EmiliaModena 41100Italy Hepato-pancreato-biliary Surgery and Liver Transplantation Unit University of Modena and Reggio EmiliaModena 41100Italy Division of Molecular Oncology Centro di Riferimento Oncologico di Aviano(CRO)Istituto di Ricovero e Cura a Carattere Scientifico(IRCCS)National Cancer InstituteAviano 33081Italy

Pancreatic ductal adenocarcinoma(PDAC)is a lethal disease,characterized by an intense desmoplastic reaction that compresses blood vessels and limits nutrient *** aggressiveness largely relies on its extraordinary capability to thrive and progress in a challenging tumor *** of the onco-suppressor miR-15a has been extensively documented in ***,we identified the transcription factor Fos-related antigen-2(Fra-2)as a miR-15a target mediating the adaptive mechanism of PDAC to nutrient *** report that the IGF1 signaling pathway was enhanced in nutrient deprived PDAC cells and that Fra-2 and IGF1R were significantly overexpressed in miR-15a downmodulated PDAC ***,we discovered that miR-15a repressed IGF1R expression via Fra-2 *** miR-15a-low context,IGF1R hyperactivated mTOR,modulated the autophagic flux and sustained PDAC growth in nutrient *** a genetic mouse model,Mir15aKO PDAC showed Fra-2 and Igf1r upregulation and mTOR activation in response to diet ***,nutrient restriction improved the efficacy of IGF1R inhibition in a Fra-2 dependent ***,our results point to a crucial role of Fra-2 in the cellular stress response due to nutrient restriction typical of pancreatic cancer and support IGF1R as a promising and vulnerable target in miR-15a downmodulated PDAC.

关键词： IGF1R Fra miR

Uptake and Partitioning of Amino Acids and Peptides

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Molecular Plant 2010年第6期3卷 997-1011页

作者： Mechthild Tegeder Doris rentsch School of Biological Sciences Washington State University Pullman WA 99164-4236 USA Institute of Plant Sciences University of Bern Altenbergrain 21 3013 Bern Switzerland

Plant growth, productivity, and seed yield depend on the efficient uptake, metabolism, and allocation of nutrients. Nitrogen is an essential macronutrient needed in high amounts. Plants have evolved efficient and selective transport systems for nitrogen uptake and transport within the plant to sustain development, growth, and finally reproduction. This review summarizes current knowledge on membrane proteins involved in transport of amino acids and peptides. A special emphasis was put on their function in planta. We focus on uptake of the organic nitrogen by the root, source-sink partitioning, and import into floral tissues and seeds.

关键词： Organic nitrogen amino acid peptide transporter source sink root leaf flower seed nitrogen uptake assimilate partitioning.

Survival benefit in patients after palliative resection vs non-resection colon cancer surgery

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World Journal of Gastroenterology 2006年第41期12卷 6634-6638页

作者： A Beham M rentsch K Püllmann L Mantouvalou H Spatz HJ Schlitt A Obed Department of Surgery University of RegensburgGermany

AIM: To evaluate survival in patients undergoing pallia- tive resection versus non-resection surgery for primary colorectal cancer in a retrospective analysis. METHODS: Demographics, TNM status, operating de- tails and survival were reviewed for 67 patients under- going surgery for incurable colorectal cancer. Palliative resection of the primary tumor was performed in 46 cases in contrast to 21 patients with non-resection of the primary tumor and bypass surgery. Risk factors for post- operative mortality and poor survival were analyzed with univariate and multivariate ***: The two groups were comparable in terms of age, gender, preoperative presence of ileus and tumor stage. Multivariate analysis showed that median survival was significantly higher in patients with palliative resec- tion surgery (544 vs 233 d). Differentiation of the tumor and tumor size were additional independent factors that were associated with a significantly poorer survival rate. CONCLUSION: Palliative resection surgery for primary colorectal cancer is associated with a higher median survival rate. Also, the presence of liver metastasis and tumor size are associated with poor survival. Therefore, resection of the primary tumor should be considered in patients with non-curable colon cancer.

关键词： Palliative surgery Colorectal cancer

A Critical Role of AMT2;1 in Root-To-Shoot Translocation of Ammonium in Arabidopsis

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Molecular Plant 2017年第11期10卷 1449-1460页

作者： Ricardo F.H. Giehl Alberto M. Laginha Fengying Duan Doris rentsch Lixing Yuan Nicolaus von Wirén Department of Physiology and Cell Biology Leibniz Institute of Plant Genetics and Crop Plant Research (IPK) Corrensstrasse 3 06466 Gatersleben Germany Institute of Plant Sciences University of Bern Aitenbergrain 21 3013 Bern Switzerland Key Lab of Plant-Soil Interaction MOE College of Resources and Environmental Sciences China Agricultural University Beijing 100193 China

Ammonium uptake in plant roots is mediated by AMT/MEP/Rh-type ammonium transporters. Out of five AMTs being expressed in Arabidopsis roots, four AMT1-type transporters contribute to ammonium uptake, whereas no physiological function has so far been assigned to the only homolog belonging to the MEP subfamily, AMT2;1. Based on the observation that under ammonium supply, the transcript levels of AMT2;1 increased and its promoter activity shifted preferentially to the pericycle, we assessed the contribution of AMT2;1 to xylem loading. When exposed to ^15N-labeled ammonium, amt2;1 mutant lines translocated less tracer to the shoots and contained less ammonium in the xylem sap. Moreover, in an amtl;1 amtl;2 amtl ;3 amt2;1 quadruple mutant （qko）, co-expression of AMT2;1 with either AMT1;2 or AMT1;3 significantly enhanced ^15N translocation to shoots, indicating a cooperative action between AMT2;1 and AMT1 transporters. Under N deficiency, proAMT2;1-GFP lines showed enhanced promoter activity predominantly in cortical root cells, which coincided with elevated ammonium influx conferred by AMT2;1 at millimolar sub- strate concentrations. Our results indicate that in addition to contributing moderately to root uptake in the low-affinity range, AMT2;1 functions mainly in root-to-shoot translocation of ammonium, depending on its Cell-type-specific expression in response to the plant nutritional status and to local ammonium gradients.

关键词： nitrogen uptake nitrogen translocation ammonium assimilation xylem loading ammonia transport ammonium influx

Online Process Control of Alkaline Texturing Baths: Determination of the Chemical Concentrations

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American Journal of Analytical Chemistry 2014年第3期5卷 205-210页

作者： Martin Zimmer Katrin Krieg Jochen rentsch Department PV Production Technology and Quality Assurance Fraunhofer Institute for Solar Energy Systems Freiburg Germany

Almost every monocrystalline silicon solar cell design includes a wet chemical process step for the alkaline texturing of the wafer surface in order to reduce the reflection of the front side. The alkaline texturing solution contains hydroxide, an organic additive usually 2-propanol and as a reaction product silicate. The hydroxide is consumed due to the reaction whereas 2-propanol evaporates during the process. Therefore, the correct replenishment for both components is required in order to achieve constant processing conditions. This may be simplified by using analytical methods for controlling the main components of the alkaline bath. This study gives an overview for a successful analytical method of the main components of an alkaline texturing bath by titration, HPLC, surface tension and NIR spectrometry.

关键词： Alkaline Texturisation Titration High Performance Liquid Chromatography (HPLC) Surface Tension Measurement Near-Infrared Spectroscopy (NIR) Silicon Solar Cell Manufacturing

OsPTR9 can enhance nitrogen use efficiency,growth and grain yield of rice

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OsPTR9 can enhance nitrogen use efficiency,growth and grain ...