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An optimized electrotransformation protocol for Lactobacillus jensenii. PLoS One 2023; 18:e0280935. [PMID: 36800374 PMCID: PMC9937494 DOI: 10.1371/journal.pone.0280935] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Accepted: 01/12/2023] [Indexed: 02/18/2023] Open
Abstract
Engineered bacteria are promising candidates for in situ detection and treatment of diseases. The female uro-genital tract presents several pathologies, such as sexually transmitted diseases or genital cancer, that could benefit from such technology. While bacteria from the gut microbiome are increasingly engineered, the use of chassis isolated from the female uro-genital resident flora has been limited. A major hurdle to implement the experimental throughput required for efficient engineering in these non-model bacteria is their low transformability. Here we report an optimized electrotransformation protocol for Lactobacillus jensenii, one the most widespread species across vaginal microflora. Starting from classical conditions, we optimized buffers, electric field parameters, cuvette type and DNA quantity to achieve an 80-fold improvement in transformation efficiency, with up to 3.5·103 CFUs/μg of DNA in L. jensenii ATCC 25258. We also identify several plasmids that are maintained and support reporter gene expression in L. jensenii. Finally, we demonstrate that our protocol provides increased transformability in three independent clinical isolates of L. jensenii. This work will facilitate the genetic engineering of L. jensenii and enable its use for addressing challenges in gynecological healthcare.
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Computational Methods for the Design of Recombinase Logic Circuits with Adaptable Circuit Specifications. Methods Mol Biol 2023; 2553:155-171. [PMID: 36227543 DOI: 10.1007/978-1-0716-2617-7_8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Synthetic biology aims at engineering new biological systems and functions that can be used to provide new technological solutions to worldwide challenges. Detection and processing of multiple signals are crucial for many synthetic biology applications. A variety of logic circuits operating in living cells have been implemented. One particular class of logic circuits uses site-specific recombinases mediating specific DNA inversion or excision. Recombinase logic offers many interesting features, including single-layer architectures, memory, low metabolic footprint, and portability in many species. Here, we present two automated design strategies for both Boolean and history-dependent recombinase-based logic circuits. One approach is based on the distribution of computation within multicellular consortia, and the other is a single-cell design. Both are complementary and adapted for non-expert users via a web design interface, called CALIN and RECOMBINATOR, for multicellular and single-cell design strategies, respectively. In this book chapter, we are guiding the reader step by step through recombinase logic circuit design, from selecting the design strategy fitting to their final system of interest to obtaining the final design using one of our design web interfaces.
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[Sleeping Sickness: A Cause of False Positive HIV Rapid Diagnostic Tests]. MEDECINE TROPICALE ET SANTE INTERNATIONALE 2021; 1:mtsibulletin.2021.115. [PMID: 35586587 PMCID: PMC9022761 DOI: 10.48327/mtsibulletin.2021.115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Accepted: 06/04/2021] [Indexed: 11/17/2022]
Abstract
Approaching the mechanisms related to false positives HIV rapid diagnostic tests (RDT) in patients with sleeping sickness may help to improve the accuracy of screening for HIV infection in areas endemic for Human African trypanosomiasis (HAT).We report on a patient from Congo who was managed like an AIDS-associated meningoencephalitis, based on a false positive HIV RDT at admission, and eventually received a diagnosis of sleeping sickness. A further retrospective cohort study performed in patients with HAT shows that most of positive HIV RDT obtained prior to treatment for sleeping sickness are false positives. We found that half of them were cleared at the end of treatment course, suggesting an early clearance of some antibodies involved in cross-reactivity.A substantial clearance of HIV RDT false positives occurs during therapy for HAT. In areas where Elisa HIV tests are not readily available, repeating the HIV RDT at the end of therapy may help to identify roughly half of false positives.
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Safety and efficiency of multimodal imaging approach of patent foramen ovale closure in patients with cryptogenic stroke. ARCHIVES OF CARDIOVASCULAR DISEASES SUPPLEMENTS 2021. [DOI: 10.1016/j.acvdsp.2020.10.310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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5
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Silent thrombosis of a WATCHMAN device after Left Atrial Appendage ClosureDate from the RESET registry. ARCHIVES OF CARDIOVASCULAR DISEASES SUPPLEMENTS 2019. [DOI: 10.1016/j.acvdsp.2018.10.113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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6
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Nascent teichoic acids insertion into the cell wall directs the localization and activity of the major pneumococcal autolysin LytA. ACTA ACUST UNITED AC 2018; 2:24-37. [PMID: 32743129 PMCID: PMC7389264 DOI: 10.1016/j.tcsw.2018.05.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Revised: 05/17/2018] [Accepted: 05/18/2018] [Indexed: 12/14/2022]
Abstract
Peptidoglycan which sustains bacterial growth is targeted by b-lactam antibiotics. Spread of antibiotic resistance requires the development of new antibacterial drugs. The cell wall of Gram-positive bacteria carries teichoic acids and virulence factors. Function and surface localization of virulence factors are regulated by teichoic acids. Anti-bacterial strategy should target the localization of surface virulence factors.
The bacterial cell wall is in part composed of the peptidoglycan (PG) layer that maintains the cell shape and sustains the basic cellular processes of growth and division. The cell wall of Gram-positive bacteria also carries teichoic acids (TAs). In this work, we investigated how TAs contribute to the structuration of the PG network through the modulation of PG hydrolytic enzymes in the context of the Gram-positive Streptococcus pneumoniae bacterium. Pneumococcal TAs are decorated by phosphorylcholine residues which serve as anchors for the Choline-Binding Proteins, some of them acting as PG hydrolases, like the major autolysin LytA. Their binding is non covalent and reversible, a property that allows easy manipulation of the system. In this work, we show that the release of LytA occurs independently from its amidase activity. Furthermore, LytA fused to GFP was expressed in pneumococcal cells and showed different localization patterns according to the growth phase. Importantly, we demonstrate that TAs modulate the enzymatic activity of LytA since a low level of TAs present at the cell surface triggers LytA sensitivity in growing pneumococcal cells. We previously developed a method to label nascent TAs in live cells revealing that the insertion of TAs into the cell wall occurs at the mid-cell. In conclusion, we demonstrate that nascent TAs inserted in the cell wall at the division site are the specific receptors of LytA, tuning in this way the positioning of LytA at the appropriate place at the cell surface.
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Specific and spatial labeling of choline-containing teichoic acids in Streptococcus pneumoniae by click chemistry. Chem Commun (Camb) 2018; 53:10572-10575. [PMID: 28894874 DOI: 10.1039/c7cc05646j] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Propargyl-choline was efficiently incorporated into teichoic acid (TA) polymers on the surface of Streptococcus pneumoniae. The introduction of a fluorophore by click chemistry enabled sufficient labeling of the pneumococcus, as well as its specific detection when mixed with other bacterial species. The labeling is localized at the septal site, suggesting a similar location of the TA and peptidoglycan (PG) synthetic machineries. This method is a unique opportunity to improve our understanding of the spatial location of pneumococcal TA biosynthesis.
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Cardiac computed tomography angiography to detect residual peridevice leak after left atrial appendage occlusion with a Watchman device. ARCHIVES OF CARDIOVASCULAR DISEASES SUPPLEMENTS 2018. [DOI: 10.1016/j.acvdsp.2017.11.306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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9
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Benefit of switching dual antiplatelet therapy after ACS according to platelet reactivity: A prespecified analysis of the TOPIC randomized study. ARCHIVES OF CARDIOVASCULAR DISEASES SUPPLEMENTS 2018. [DOI: 10.1016/j.acvdsp.2017.11.035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Left atrial appendage percutaneous closure with a watchman device in patients with a contraindication to long-term oral anticoagulation. One-year follow-up. ARCHIVES OF CARDIOVASCULAR DISEASES SUPPLEMENTS 2018. [DOI: 10.1016/j.acvdsp.2017.11.288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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11
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Impact of diabetes on benefit of switching dual antiplatelet therapy after acute coronary syndrome: A subanalysis of the TOPIC randomized study. ARCHIVES OF CARDIOVASCULAR DISEASES SUPPLEMENTS 2018. [DOI: 10.1016/j.acvdsp.2017.11.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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12
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The amount of material retrieved by thrombus aspiration in patients referred for an Acute Coronary Syndrome is associated with their clinical and angiographic characteristics. ARCHIVES OF CARDIOVASCULAR DISEASES SUPPLEMENTS 2018. [DOI: 10.1016/j.acvdsp.2017.11.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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13
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Benefit of switching dual antiplatelet therapy after acute coronary syndrome: The TOPIC (Timing Of Platelet Inhibition after acute Coronary Syndrome) randomized study. ARCHIVES OF CARDIOVASCULAR DISEASES SUPPLEMENTS 2018. [DOI: 10.1016/j.acvdsp.2017.11.033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Benefit of switching dual antiplatelet therapy after ACS on dual antiplatelet therapy adherence: A prespecified analysis of the TOPIC randomized study. ARCHIVES OF CARDIOVASCULAR DISEASES SUPPLEMENTS 2018. [DOI: 10.1016/j.acvdsp.2017.11.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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15
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Non-HDL Cholesterol is predictive of diffusion of coronary artery disease in young patients presenting with a myocardial infarction. ARCHIVES OF CARDIOVASCULAR DISEASES SUPPLEMENTS 2018. [DOI: 10.1016/j.acvdsp.2017.11.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Microbially derived biosensors for diagnosis, monitoring and epidemiology. Microb Biotechnol 2017; 10:1031-1035. [PMID: 28771944 PMCID: PMC5609271 DOI: 10.1111/1751-7915.12791] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2017] [Accepted: 07/04/2017] [Indexed: 11/27/2022] Open
Abstract
Living cells have evolved to detect and process various signals and can self-replicate, presenting an attractive platform for engineering scalable and affordable biosensing devices. Microbes are perfect candidates: they are inexpensive and easy to manipulate and store. Recent advances in synthetic biology promise to streamline the engineering of microbial biosensors with unprecedented capabilities. Here we review the applications of microbially-derived biosensors with a focus on environmental monitoring and healthcare applications. We also identify critical challenges that need to be addressed in order to translate the potential of synthetic microbial biosensors into large-scale, real-world applications.
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Autocatalytic association of proteins by covalent bond formation: a Bio Molecular Welding toolbox derived from a bacterial adhesin. Sci Rep 2017; 7:43564. [PMID: 28252635 PMCID: PMC5333627 DOI: 10.1038/srep43564] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Accepted: 01/25/2017] [Indexed: 11/26/2022] Open
Abstract
Unusual intramolecular cross-links present in adhesins from Gram-positive bacteria have been used to develop a generic process amenable to biotechnology applications. Based on the crystal structure of RrgA, the Streptococcus pneumoniae pilus adhesin, we provide evidence that two engineered protein fragments retain their ability to associate covalently with high specificity, in vivo and in vitro, once isolated from the parent protein. We determined the optimal conditions for the assembly of the complex and we solved its crystal structure at 2 Å. Furthermore, we demonstrate biotechnological applications related to antibody production, nanoassembly and cell-surface labeling based on this process we named Bio Molecular Welding.
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Measurements by CT angiography of the left atrial appendage before percutaneous closure with a watchman device. ARCHIVES OF CARDIOVASCULAR DISEASES SUPPLEMENTS 2017. [DOI: 10.1016/s1878-6480(17)30178-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Percutaneous closure of left atrial appendage with a watchman device: a single center study. ARCHIVES OF CARDIOVASCULAR DISEASES SUPPLEMENTS 2017. [DOI: 10.1016/s1878-6480(17)30212-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Cardiac computed tomography angiography is helpful to select patients for left atrial appendage occlusion with a watchman device. ARCHIVES OF CARDIOVASCULAR DISEASES SUPPLEMENTS 2017. [DOI: 10.1016/s1878-6480(17)30213-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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21
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Taking NIPT to the next level: detection of fetal trisomy 21 based on quantitative real-time PCR. Geburtshilfe Frauenheilkd 2016. [DOI: 10.1055/s-0036-1593190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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Detection of pathological biomarkers in human clinical samples via amplifying genetic switches and logic gates. Sci Transl Med 2016; 7:289ra83. [PMID: 26019219 DOI: 10.1126/scitranslmed.aaa3601] [Citation(s) in RCA: 143] [Impact Index Per Article: 17.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Whole-cell biosensors have several advantages for the detection of biological substances and have proven to be useful analytical tools. However, several hurdles have limited whole-cell biosensor application in the clinic, primarily their unreliable operation in complex media and low signal-to-noise ratio. We report that bacterial biosensors with genetically encoded digital amplifying genetic switches can detect clinically relevant biomarkers in human urine and serum. These bactosensors perform signal digitization and amplification, multiplexed signal processing with the use of Boolean logic gates, and data storage. In addition, we provide a framework with which to quantify whole-cell biosensor robustness in clinical samples together with a method for easily reprogramming the sensor module for distinct medical detection agendas. Last, we demonstrate that bactosensors can be used to detect pathological glycosuria in urine from diabetic patients. These next-generation whole-cell biosensors with improved computing and amplification capacity could meet clinical requirements and should enable new approaches for medical diagnosis.
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PERCEVAL v4.0 : A New PC Code for Gamma Radiation Studies Based upon Most Recent Development about Point Kernel. J NUCL SCI TECHNOL 2014. [DOI: 10.1080/00223131.2000.10874941] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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24
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A-10: Complications infectieuses des lymphomes liés au VIH pris en charge par une association rituximab-polychimiothérapie. Med Mal Infect 2014. [DOI: 10.1016/s0399-077x(14)70093-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Effect of ivabradine on left ventricular remodelling after reperfused myocardial infarction: a pilot study. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht308.p1329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Abstract
In this issue, Broussard et al. (2013) report genetic switches that regulate cell fate selection; a recombinase attachment site is embedded within a repressor coding sequence, such that integration truncates a proteolysis domain, stabilizing the repressor and setting the switch.
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Résultats carcinologiques et fonctionnels (urinaires et digestifs) obtenus chez 748 patients consécutifs traités par implant permanent de grains d’iode125 pour un adénocarcinome prostatique. Prog Urol 2012. [DOI: 10.1016/j.purol.2012.08.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Curiethérapie prostatique par implant permanent de grains d’iode125 : comparaison de trois techniques successives d’implantation. Prog Urol 2012. [DOI: 10.1016/j.purol.2012.08.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Ankle brachial index using an automatic blood pressure device in occupational medicine: relevance in routine examination and comparison with Framingham cardio-vascular risk score. Int J Clin Pract 2012; 66:862-6. [PMID: 22897463 DOI: 10.1111/j.1742-1241.2012.02984.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
AIM The aim of this study was to assess the feasibility and relevance of determining ankle brachial index (ABI) using an automatic blood pressure device in subjects seen for their annual routine examination by occupational physicians and to compare the obtained ABI with the Framingham score. PATIENTS AND METHODS Sixteen physicians randomly recruited 634 subjects in 12 departments of occupational medicine. Subjects aged between 40 and 60 years underwent a determination of ABI using an OMRON HM 722 device and the analysis of Framingham score. Other analysed variables were: sex, age, smoking habit, hypertension, diabetes, hypercholesterolemia, glycaemia, total cholesterol, HDL and LDL cholesterol and triglycerides levels. RESULTS Mean age of the population studied was 48.1 ± 6.0 years; 73% were men, 36% were smokers, 14% had hypertension, 3.3% diabetes and 22% hypercholesterolemia. Biochemical values were glycaemia 0.90 ± 0.30 g/l, total cholesterol 2.10 ± 0.4 g/l, HDL cholesterol level 0.50 ± 0.20 g/l, LDL cholesterol level 1.30 ± 0.40 g/l, and triglycerides 1.40 ± 1.0 g/l. Mean ABI were 1.1 ± 0.1 in both legs. Mean Framingham score was 8.2 ± 5.4%. Only 20 subjects (3%) had an ABI < 0.90. No relation was found between pathological ABI and Framingham score (abnormal ABI : 9.9 ± 5.5 vs. normal ABI : 8.2 ± 5.4, NS). CONCLUSION The determination of ABI using a simple commercially available automatic blood pressure device is feasible and easy to implement by preventive or general physicians in all kinds of routine examinations. In our opinion automatic ABI very easy and quick to determine provides, in addition to Framingham score, a simple and useful tool to detect subjects at high cardio-vascular risk.
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Abstract
This review describes the ballistic quality assurance for stereotactic intracranial irradiation treatments delivered with Gamma Knife® either dedicated or adapted medical linear accelerators. Specific and periodic controls should be performed in order to check the mechanical stability for both irradiation and collimation systems. If this step remains under the responsibility of the medical physicist, it should be done in agreement with the manufacturer's technical support. At this time, there are no recent published guidelines. With technological developments, both frequency and accuracy should be assessed in each institution according to the treatment mode: single versus hypofractionnated dose, circular collimator versus micro-multileaf collimators. In addition, "end-to-end" techniques are mandatory to find the origin of potential discrepancies and to estimate the global ballistic accuracy of the delivered treatment. Indeed, they include frames, non-invasive immobilization devices, localizers, multimodal imaging for delineation and in-room positioning imaging systems. The final precision that could be reasonably achieved is more or less 1mm.
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A human metapneumovirus outbreak at a community hospital in England, July to September 2010. Euro Surveill 2012; 17:20145. [PMID: 22516049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023] Open
Abstract
We describe an outbreak of human metapneumovirus (hMPV) which occurred in July-September 2010 at a community hospital in the East of England. Based on the medical and nursing records, cases were retrospectively defined as suspected if they had had an influenza-like illness (ILI), and probable if they had had an ILI and an epidemiological link to a laboratory-confirmed case. Of a total of 17 symptomatic inpatients, five were classified as probable cases, five were laboratory confirmed and seven were suspected. The attack rate was 29.4% for confirmed and probable cases combined. The median age of symptomatic inpatients was 85 years-old (range 68-96) and the majority (16/17) of symptomatic inpatients had an underlying medical condition. Control measures introduced appeared to restrict further exposure of susceptible patients to infection although modelling suggested that up to four of 10 confirmed and probable cases (40%) could have been prevented through more timely diagnosis and recognition of an outbreak. These findings suggest that there should be increased awareness of hMPV infection within healthcare settings, particularly when the population at risk has a high prevalence of underlying co-morbidities.
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A human metapneumovirus outbreak at a community hospital in England, July to September 2010. Euro Surveill 2012. [DOI: 10.2807/ese.17.15.20145-en] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Binary file ES_Abstracts_Final_ECDC.txt matches
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Phosphorus based organic–inorganic hybrid materials prepared by reactive processing for EVA fire retardancy. Polym Degrad Stab 2012. [DOI: 10.1016/j.polymdegradstab.2012.01.018] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Reflection contrast microscopy performed on epi-illumination microscope stands: Comparison of reflection contrast- and epi-polarization microscopy. J Microsc 2011. [DOI: 10.1111/j.1365-2818.1990.tb03014.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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35
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Polycomb-Dependent Regulatory Contacts between Distant Hox Loci in Drosophila. Cell 2011; 144:214-26. [DOI: 10.1016/j.cell.2010.12.026] [Citation(s) in RCA: 269] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2009] [Revised: 09/22/2010] [Accepted: 12/17/2010] [Indexed: 10/18/2022]
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D-cycloserine enhances spatial learning performances of rats chronically exposed to lead during the developmental period. AFRICAN JOURNAL OF NEUROLOGICAL SCIENCES 2010. [DOI: 10.4314/ajns.v28i1.55141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Étude rétrospective du contrôle local et du résultat cosmétique de 147 carcinomes de la face après curiethérapie interstitielle. Cancer Radiother 2009. [DOI: 10.1016/j.canrad.2009.08.081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Investigations on the Intermediate Metabolism of Steroid Hormones and Carcinogenic Compounds. Oncology 2009. [DOI: 10.1159/000224054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Abstract: P867 HPA1 POLYMORPHISM IN APOLIPOPROTEIN C1 GENE IS ASSOCIATED WITH CORONARY ARTERY DISEASE SEVERITY. ATHEROSCLEROSIS SUPP 2009. [DOI: 10.1016/s1567-5688(09)70988-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Detection of coronary stenoses by stress echocardiography using a previously implanted pacemaker for ventricular pacing: preliminary report of a new method. Clin Cardiol 2009; 23:842-8. [PMID: 11097132 PMCID: PMC6655253 DOI: 10.1002/clc.4960231111] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
BACKGROUND The number of patients with pacemakers has been increasing and a large number of them will present with chest pain or symptoms suggesting angina pectoris. Myocardial ischemia and presence of coronary artery disease are difficult to detect and assess by noninvasive methods in patients with a pacemaker; the electrocardiogram (ECG) at rest and during exercise is usually very difficult to analyze in terms of ischemia or even presence of an acute myocardial infarction. HYPOTHESIS To detect significant coronary stenosis in patients with previously implanted pacemakers, we tested a new stress echocardiography method using incremental ventricular pacing by already implanted pacemakers. METHODS We studied prospectively 25 consecutive patients who underwent stress echocardiography with increasing ventricular pacing up to either 85% of the age-predicted maximal heart rate or chest pain. Positive tests were defined by new hypokinesia or worsening of a preexisting alteration in wall motion in at least two adjacent territories. All patients underwent coronary angiograms to define the presence and severity of coronary stenoses. RESULTS Among the 25 tests, 11 (44%) were stopped for chest pain. 1 (4%) for moderate discomfort, 1 (4%) for a drop in blood pressure, and the target pacing rate was achieved in the tests of the remaining 12 patients (48%). There were no complications. Thirteen patients had significant stenoses. In 10 cases, stress echocardiography was a true positive test with respect to coronary angiography. There were 11 true negative, 1 false positive, and 3 false negative tests. The sensitivity was 77%, specificity was 90%, the positive predictive value was 91%, and the negative predictive value 79%. The accuracy was 84%. CONCLUSIONS This new stress echocardiography method appears feasible, easy, safe, and effective for detection of significant coronary stenoses in patients with pacemakers.
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Characterization of centrosomal localization and dynamics of Cdc25C phosphatase in mitosis. Cell Cycle 2008; 7:1991-8. [PMID: 18604163 DOI: 10.4161/cc.7.13.6095] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
In mammalian cells, three Cdc25 phosphatases A, B, C coordinate cell cycle progression through activating dephosphorylation of Cyclin-dependent kinases. Whereas Cdc25B is believed to trigger entry into mitosis, Cdc25C is thought to act at a later stage of mitosis and in the nucleus. We report that a fraction of Cdc25C localises to centrosomes in a cell cycle-dependent fashion, as of late S phase and throughout G(2) and mitosis. Moreover, Cdc25C colocalises with Cyclin B1 at centrosomes in G(2) and in prophase and Fluorescence Recovery after Photobleaching experiments reveal that they are both in dynamic exchange between the centrosome and the cytoplasm. The centrosomal localisation of Cdc25C is essentially mediated by its catalytic C-terminal domain, but does not require catalytic activity. In fact phosphatase-dead and substrate-binding hotspot mutants of Cdc25C accumulate at centrosomes together with phosphoTyr15-Cdk1 and behave as dominant negative forms that impair entry into mitosis. Taken together, our data suggest an unexpected function for Cdc25C at the G(2)/M transition, in dephosphorylation of Cdk1. We propose that Cdc25C may participate in amplification of Cdk1-Cyclin B1 activity following initial activation by Cdc25B, and that this process is initiated at the centrosome, then further propagated throughout the cytoplasm thanks to the dynamic behavior of both Cdc25C and Cyclin B1.
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Quality control in pulsed dose rate brachytherapy with Ir-192 afterloading system: The use of radiochromic films. Brachytherapy 2008. [DOI: 10.1016/j.brachy.2008.02.255] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Differential phosphorylation of Cdc25C phosphatase in mitosis. Biochem Biophys Res Commun 2008; 370:483-8. [PMID: 18384749 DOI: 10.1016/j.bbrc.2008.03.117] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2008] [Accepted: 03/24/2008] [Indexed: 01/24/2023]
Abstract
Cdc25 dual-specificity phosphatases coordinate entry into mitosis through activating dephosphorylation of the Mitosis-Promoting Factor, Cdk1-cyclin B1. Activation of Cdc25C at the G2/M transition, involves its dissociation from 14-3-3, together with its hyperphosphorylation on several sites within its regulatory N-terminal domain, mediated by cyclin-dependent kinases and Plk1. Growing evidence suggests that phosphorylation intermediates are likely to precede complete hyperphosphorylation of Cdc25C. To address whether such variants occur in mitotic cells, we raised antibodies directed against different mitotic phosphorylation sites of human Cdc25C, and characterized the phosphorylated species detectable in HeLa cells. In the present study, we provide first-time evidence for the existence of multiple species of Cdc25C in mitotic cell extracts, including full-length and splice variants with different phosphorylation patterns, thereby revealing an intricate network of Cdc25C phosphatases, likely to have distinct biological functions.
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Stepped horn actuated Kelvin probe. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2008; 79:025110. [PMID: 18315332 DOI: 10.1063/1.2841075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
We have developed an original Kelvin probe system using an ultrasonic stepped horn sonotrode. This actuator is optimized in order to maximize the velocity of the tip end, and hence to increase the Kelvin current detected. Such development is essential to improve surface potential measurements at small spatial scale.
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Uridine supplementation with Mitocnol antagonizes antiretroviral nucleoside analogue-induced mitochondrial peripheral and cerebral neuropathy in vivo. J Int AIDS Soc 2008. [DOI: 10.1186/1758-2652-11-s1-p148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Évaluation delafonction éjaculatoire après curiethérapie interstitielle prostatique pargrains d'iode 125. Cancer Radiother 2007. [DOI: 10.1016/j.canrad.2007.09.104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Accélération de la fixation par le micro-ondes : l’expérience bordelaise. Ann Pathol 2007. [DOI: 10.1016/s0242-6498(07)92881-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Apport d'une fonction objectif basée surladose équivalente uniforme surlesplans detraitements parmodulation d'intensité (RCMI). Cancer Radiother 2007. [DOI: 10.1016/j.canrad.2007.09.076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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