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Saksoe M, Jensen K, Andersen M, Eriksen J, Overgaard J. OC-041 DAHANCA 28a: Phase I/II study of acc. hyperfractionated RT, cisplatin and nimorazole in P16-LAHNSCC. Radiother Oncol 2019. [DOI: 10.1016/s0167-8140(19)30207-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Andreassen C, Eriksen J, Jensen K, Hansen C, Sørensen B, Lassen P, Alsner J, Schack L, Overgaard J, Grau C. IMRT – Biomarkers for dose escalation, dose de-escalation and personalized medicine in radiotherapy for head and neck cancer. Oral Oncol 2018; 86:91-99. [DOI: 10.1016/j.oraloncology.2018.09.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Accepted: 09/03/2018] [Indexed: 12/13/2022]
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Sedaghat-Hamedani F, Kayvanpour E, Tugrul OF, Amr A, Lai A, Haas J, Proctor T, Ehlermann PH, Jensen K, Katus HA, Meder B. P4729Spectrum of clinical phenotypes and genotypes in 5310 patients with hypertrophic cardiomyopathy. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy563.p4729] [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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Cardoso JGR, Jensen K, Lieven C, Lærke Hansen AS, Galkina S, Beber M, Özdemir E, Herrgård MJ, Redestig H, Sonnenschein N. Cameo: A Python Library for Computer Aided Metabolic Engineering and Optimization of Cell Factories. ACS Synth Biol 2018; 7:1163-1166. [PMID: 29558112 DOI: 10.1021/acssynbio.7b00423] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Computational systems biology methods enable rational design of cell factories on a genome-scale and thus accelerate the engineering of cells for the production of valuable chemicals and proteins. Unfortunately, the majority of these methods' implementations are either not published, rely on proprietary software, or do not provide documented interfaces, which has precluded their mainstream adoption in the field. In this work we present cameo, a platform-independent software that enables in silico design of cell factories and targets both experienced modelers as well as users new to the field. It is written in Python and implements state-of-the-art methods for enumerating and prioritizing knockout, knock-in, overexpression, and down-regulation strategies and combinations thereof. Cameo is an open source software project and is freely available under the Apache License 2.0. A dedicated Web site including documentation, examples, and installation instructions can be found at http://cameo.bio . Users can also give cameo a try at http://try.cameo.bio .
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Hvid C, Elstrøm U, Jensen K, Grau C. PV-0427: CBCT based estimation of delivered dose is not more predictive for NTCP than planned dose. Radiother Oncol 2018. [DOI: 10.1016/s0167-8140(18)30737-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Samsøe E, Grau C, Johansen J, Andersen E, Petersen J, Jensen K, Smulders B, Friborg J, Sand H, Andersen M, Logadóttir A, Ujmajuridze Z, Hansen C. PO-0922: Implementation of swallowing organs in national radiotherapy guidelines for H&N cancer. Radiother Oncol 2018. [DOI: 10.1016/s0167-8140(18)31232-5] [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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Mäkitie A, Ruuskanen M, Bentzen J, Brun E, Gebre-Medhin M, Friesland S, Marsk E, Hammarstedt-Nordenvall L, Gille E, Reizenstein J, Adell G, Farnebo L, Rzepecki J, Haugen H, Söderström K, Zackrisson B, Bergström S, Lödén B, Cederblad L, Laurell G, Smeland E, Folkvard Evensen J, Lund JÅ, Tøndel H, Karlsdottir Å, Jóhannsson J, Johansen J, Kristensen CA, Jensen K, Andersen LJ, Koivunen P, Korpela M, Voutilainen L, Wigren T, Minn H, Joensuu H, Overgaard J, Saarilahti K. The management and survival outcomes of nasopharyngeal cancer in the Nordic countries<sup/>. Acta Oncol 2018; 57:557-560. [PMID: 29202641 DOI: 10.1080/0284186x.2017.1408961] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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58
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Caira JN, Jensen K, Fyler CA. A New Genus of Tapeworm (Cestoda: Onchoproteocephalidea) from Sawfish (Elasmobranchii: Pristidae). J Parasitol 2018; 104:133-144. [PMID: 29334823 DOI: 10.1645/17-165] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Collections from the dwarf sawfish, Pristis clavata, near Darwin, Australia, in 1997 led to the discovery of the new onchoproteocephalidean genus Matticestus n. gen.-a taxon that has been referred to in molecular phylogenetic analyses in which it has been included as "New genus 8." Its type species, Matticestus anneae n. gen., n. sp., and a second species, Matticestus kathleenae n. sp., are described. Placement of this taxon in the Onchoproteocephalidea is supported morphologically in that both species bear a scolex with 4 bothridia each with a pair of bi-pronged hooks and spinitriches that extend throughout the length of the body. Sequence data for the D1-D3 region of the 28S rDNA gene also place the genus solidly among the other elasmobranch-hosted members of the order. The new genus differs from the other elasmobranch-hosted genera in the order in that its members possess a combination of biloculated bothridia with lateral lappets on the posterior margin of the anterior loculus and a pair of bi-pronged hooks with a distinctive configuration of tubercles and internal channels. Its members are also extremely small. In summary, Matticestus n. gen. is an unusually tiny, "spiny," genus of cestode that seems to exclusively parasitize sawfish of the genus Pristis.
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Lyhne Christensen N, Dahl J, Carter-Storch R, Bakkestroem R, Jensen K, Pecini R, Steffensen F, Soendergaard E, Videbaek L, Moeller J. P1639Association between left ventricular diastolic function and RV function and morphology in asymptomatic aortic stenosis at rest and during exercise. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx502.p1639] [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: 11/14/2022] Open
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Murphy BA, Tadin-Strapps M, Jensen K, Mogg R, Liaw A, Herath K, Bhat G, McLaren DG, Previs SF, Pinto S. siRNA-mediated inhibition of SREBP cleavage-activating protein reduces dyslipidemia in spontaneously dysmetabolic rhesus monkeys. Metabolism 2017; 71:202-212. [PMID: 28521874 DOI: 10.1016/j.metabol.2017.02.015] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/13/2016] [Revised: 02/26/2017] [Accepted: 02/27/2017] [Indexed: 01/07/2023]
Abstract
BACKGROUND SREBP cleavage-activating protein (SCAP) is a cholesterol binding endoplasmic reticulum (ER) membrane protein that is required to activate SREBP transcription factors. SREBPs regulate genes involved in lipid biosynthesis. They also influence lipid clearance by modulating the expression of LDL receptor (LDLR) and proprotein convertase subtilisin/kexin type 9 (PCSK9) genes. Inhibiting SCAP decreases circulating PCSK9, triglycerides (TG), and LDL-cholesterol (LDL-C), both in vitro and in vivo. Type 2 diabetics with dyslipidemia are at high risk for cardiovascular diseases. These patients present a unique pathophysiological lipid profile characterized by moderately elevated LDL-C, elevated TG and reduced HDL-cholesterol (HDL-C). The spontaneous dysmetabolic rhesus monkey model (DysMet RhM) recapitulates this human dyslipidemia and therefore is an attractive preclinical model to evaluate SCAP inhibition as a therapy for this disease population. The objective to of this study was to assess the effect of SCAP inhibition on the lipid profile of DysMet RhM. METHOD We assessed the effect of inhibiting hepatic SCAP on the lipid profile of DysMet RhM using an siRNA encapsulated lipid nanoparticle (siRNA-LNP). RESULTS The SCAP siRNA-LNP significantly reduced LDL-C, PCSK9 and TG in DysMet RhM; LDL-C was reduced by ≥20%, circulating PCSK9 by 30-40% and TG by >25%. These changes by the SCAP siRNA-LNP agree with the predicted effect of SCAP inhibition and reduced SREBP tone on these endpoints. CONCLUSION These data demonstrate that a SCAP siRNA-LNP improved the lipid profile in a clinically relevant preclinical disease model and provide evidence for SCAP inhibition as a therapy for diabetic dyslipidemic patients.
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Cameron L, Wen K, Chappell J, Jensen K, Bell D, Kelwick R, Kopniczky M, Davies J, Filloux A, Freemont P. 90 Using cell-free biosensors to monitor Pseudomonas aeruginosa infection in cystic fibrosis sputum. J Cyst Fibros 2017. [DOI: 10.1016/s1569-1993(17)30454-x] [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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Ronellenfitsch U, Schwarzbach M, Hofheinz R, Kienle P, Nowak K, Kieser M, Slanger TE, Burmeister B, Kelsen D, Niedzwiecki D, Schuhmacher C, Urba S, van de Velde C, Walsh TN, Ychou M, Jensen K. Predictors of overall and recurrence-free survival after neoadjuvant chemotherapy for gastroesophageal adenocarcinoma: Pooled analysis of individual patient data (IPD) from randomized controlled trials (RCTs). Eur J Surg Oncol 2017; 43:1550-1558. [PMID: 28551325 DOI: 10.1016/j.ejso.2017.05.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2017] [Accepted: 05/02/2017] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Neoadjuvant chemotherapy improves prognosis of patients with locally advanced gastroesophageal adenocarcinoma. The aim of this study was to identify predictors for postoperative survival following neoadjuvant therapy. These could be useful in deciding about postoperative continuation of chemotherapy. METHODS This meta-analysis used IPD from RCTs comparing neoadjuvant chemotherapy with surgery alone for gastroesophageal adenocarcinoma. Trials providing IPD on age, sex, performance status, pT/N stage, resection status, overall and recurrence-free survival were included. Survival was calculated in the entire study population and subgroups stratified by supposed predictors and compared using the log-rank test. Multivariable Cox models were used to identify independent survival predictors. RESULTS Four RCTs providing IPD from 553 patients fulfilled the inclusion criteria. (y)pT and (y)pN stage and resection status strongly predicted postoperative survival both after neoadjuvant therapy and surgery alone. Patients with R1 resection after neoadjuvant therapy survived longer than those with R1 resection after surgery alone. Patients with stage pN0 after surgery alone had better prognosis than those with ypN0 after neoadjuvant therapy. Patients with stage ypT3/4 after neoadjuvant therapy survived longer than those with stage pT3/4 after surgery alone. Multivariable regression identified resection status and (y)pN stage as predictors of survival in both groups. (y)pT stage predicted survival only after surgery alone. CONCLUSION After neoadjuvant therapy for gastroesophageal adenocarcinoma, survival is determined by the same factors as after surgery alone. However, ypT stage is not an independent predictor. These results can facilitate the decision about postoperative continuation of chemotherapy in pretreated patients.
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Hansen C, Johansen J, Samsøe E, Andersen E, Petersen J, Jensen K, Sand H, Andersen L, Grau C. PO-0613: Effect of geometric GTV-CTV margins in national contouring guidelines. Radiother Oncol 2017. [DOI: 10.1016/s0167-8140(17)31050-2] [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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Taasti V, Muren L, Jensen K, Petersen J, Thygesen J, Tietze A, Grau C, Hansen D. EP-1672: Dual energy CT for improved proton stopping power estimation in head and neck cancer patients. Radiother Oncol 2017. [DOI: 10.1016/s0167-8140(17)32204-1] [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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Rasmussen R, Gajjar M, Tuckova L, Jensen K, Maya-Mendoza A, Bartek J, Hamerlik P. P08.18 Replication stress as a driver of genomic instability in malignant gliomas. Neuro Oncol 2017. [DOI: 10.1093/neuonc/nox036.208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Jensen K, Krusenstjerna-Hafstrøm R, Lohse J, Petersen KH, Derand H. A novel quantitative immunohistochemistry method for precise protein measurements directly in formalin-fixed, paraffin-embedded specimens: analytical performance measuring HER2. Mod Pathol 2017; 30:180-193. [PMID: 27767098 DOI: 10.1038/modpathol.2016.176] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2016] [Revised: 08/18/2016] [Accepted: 08/23/2016] [Indexed: 12/16/2022]
Abstract
In clinical routine pathology today, detection of protein in intact formalin-fixed, paraffin-embedded tissue is limited to immunohistochemistry, which is semi-quantitative. This study presents a new and reliable quantitative immunohistochemistry method, qIHC, based on a novel amplification system that enables quantification of protein directly in formalin-fixed, paraffin-embedded tissue by counting of dots. The qIHC technology can be combined with standard immunohistochemistry, and assessed using standard bright-field microscopy or image analysis. The objective was to study analytical performance of the qIHC method. qIHC was tested under requirements for an analytical quantitative test, and compared with ELISA and flow cytometry for quantitative protein measurements. Human epidermal growth factor receptor 2 (HER2) protein expression was measured in five different cell lines with HER2 expression from undetectable with immunohistochemistry to strong positive staining (IHC 3+). Repeatability, reproducibility, robustness, linearity, dynamic range, sensitivity, and quantification limits were evaluated. Reproducibility and robustness were assessed in a setup to resemble daily work in a laboratory using a commercial immunohistochemistry platform. In addition, qIHC was correlated to standard HER2 immunohistochemistry in 44 breast cancer specimens. For all evaluated parameters, qIHC performance was either comparable or better than the reference methods. Furthermore, qIHC has a lower limit of detection than both immunohistochemistry and the ELISA reference method, and demonstrated ability to measure HER2 accurately and precise within a large dynamic range. In conclusion, the results show that qIHC provides a sensitive, quantitative, accurate, and robust assay for measurement of protein expression in formalin-fixed, paraffin-embedded cell lines, and tissue.
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Rapkin J, Jensen K, House CM, Sakaluk SK, Sakaluk JK, Hunt J. The complex interplay between macronutrient intake, cuticular hydrocarbon expression and mating success in male decorated crickets. J Evol Biol 2017; 30:711-727. [PMID: 28029711 DOI: 10.1111/jeb.13036] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2016] [Revised: 11/30/2016] [Accepted: 12/22/2016] [Indexed: 01/15/2023]
Abstract
The condition dependence of male sexual traits plays a central role in sexual selection theory. Relatively little, however, is known about the condition dependence of chemical signals used in mate choice and their subsequent effects on male mating success. Furthermore, few studies have isolated the specific nutrients responsible for condition-dependent variation in male sexual traits. Here, we used nutritional geometry to determine the effect of protein (P) and carbohydrate (C) intake on male cuticular hydrocarbon (CHC) expression and mating success in male decorated crickets (Gryllodes sigillatus). We show that both traits are maximized at a moderate-to-high intake of nutrients in a P:C ratio of 1 : 1.5. We also show that female precopulatory mate choice exerts a complex pattern of linear and quadratic sexual selection on this condition-dependent variation in male CHC expression. Structural equation modelling revealed that although the effect of nutrient intake on mating success is mediated through condition-dependent CHC expression, it is not exclusively so, suggesting that other traits must also play an important role. Collectively, our results suggest that the complex interplay between nutrient intake, CHC expression and mating success plays an important role in the operation of sexual selection in G. sigillatus.
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Glerup S, Bolcho U, Mølgaard S, Bøggild S, Vaegter CB, Smith AH, Nieto-Gonzalez JL, Ovesen PL, Pedersen LF, Fjorback AN, Kjolby M, Login H, Holm MM, Andersen OM, Nyengaard JR, Willnow TE, Jensen K, Nykjaer A. SorCS2 is required for BDNF-dependent plasticity in the hippocampus. Mol Psychiatry 2016; 21:1740-1751. [PMID: 27457814 DOI: 10.1038/mp.2016.108] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/21/2015] [Revised: 04/06/2016] [Accepted: 04/18/2016] [Indexed: 12/16/2022]
Abstract
SorCS2 is a member of the Vps10p-domain receptor gene family receptors with critical roles in the control of neuronal viability and function. Several genetic studies have suggested SORCS2 to confer risk of bipolar disorder, schizophrenia and attention deficit-hyperactivity disorder. Here we report that hippocampal N-methyl-d-aspartate receptor-dependent synaptic plasticity is eliminated in SorCS2-deficient mice. This defect was traced to the ability of SorCS2 to form complexes with the neurotrophin receptor p75NTR, required for pro-brain-derived neurotrophic factor (BDNF) to induce long-term depression, and with the BDNF receptor tyrosine kinase TrkB to elicit long-term potentiation. Although the interaction with p75NTR was static, SorCS2 bound to TrkB in an activity-dependent manner to facilitate its translocation to postsynaptic densities for synaptic tagging and maintenance of synaptic potentiation. Neurons lacking SorCS2 failed to respond to BDNF by TrkB autophosphorylation, and activation of downstream signaling cascades, impacting neurite outgrowth and spine formation. Accordingly, Sorcs2-/- mice displayed impaired formation of long-term memory, increased risk taking and stimulus seeking behavior, enhanced susceptibility to stress and impaired prepulse inhibition. Our results identify SorCS2 as an indispensable coreceptor for p75NTR and TrkB in hippocampal neurons and suggest SORCS2 as the link between proBDNF/BDNF signaling and mental disorders.
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Sanchez-Garcia J, Jensen K, Zhang Y, Rincon-Limas DE, Fernandez-Funez P. A single amino acid (Asp159) from the dog prion protein suppresses the toxicity of the mouse prion protein in Drosophila. Neurobiol Dis 2016; 95:204-9. [PMID: 27477054 PMCID: PMC5010947 DOI: 10.1016/j.nbd.2016.07.025] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Revised: 07/23/2016] [Accepted: 07/27/2016] [Indexed: 11/24/2022] Open
Abstract
Misfolding of the prion protein (PrP) is the key step in the transmission of spongiform pathologies in humans and several animals. Although PrP is highly conserved in mammals, a few changes in the sequence of endogenous PrP are proposed to confer protection to dogs, which were highly exposed to prion during the mad-cow epidemics. D159 is a unique amino acid found in PrP from dogs and other canines that was shown to alter surface charge, but its functional relevance has never been tested in vivo. Here, we show in transgenic Drosophila that introducing the N159D substitution on mouse PrP decreases its turnover. Additionally, mouse PrP-N159D demonstrates no toxicity and accumulates no pathogenic conformations, suggesting that a single D159 substitution is sufficient to prevent PrP conformational change and pathogenesis. Understanding the mechanisms mediating the protective activity of D159 is likely to lessen the burden of prion diseases in humans and domestic animals.
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Langemark M, Jensen K, Jensen T, Olesen J. Pressure Pain Thresholds and Thermal Nociceptive Thresholds in Chronic Tension-Type Headache. Cephalalgia 2016. [DOI: 10.1177/0333102489009s1075] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Jensen K, Tuxen C, Pedersen-Bjerqaard U, Jansen I, Edvinsson L, Olesen J. Substance P And Nociception In The Human Temporal Muscle. Cephalalgia 2016. [DOI: 10.1177/03331024870070s604] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Jensen K. Introduction of John M. Hawdon, Recipient of the Henry Baldwin Ward Medal for 2016. J Parasitol 2016; 102:577-578. [PMID: 27626504 DOI: 10.1645/16-121] [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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Rugbjerg P, Genee HJ, Jensen K, Sarup-Lytzen K, Sommer MOA. Molecular Buffers Permit Sensitivity Tuning and Inversion of Riboswitch Signals. ACS Synth Biol 2016; 5:632-8. [PMID: 27138234 PMCID: PMC4949582 DOI: 10.1021/acssynbio.5b00213] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
![]()
Predictable integration
of foreign biological signals and parts
remains a key challenge in the systematic engineering of synthetic
cellular actuations, and general methods to improve signal transduction
and sensitivity are needed. To address this problem we modeled and
built a molecular signal buffer network in Saccharomyces cerevisiae inspired by chemical pH buffer systems. The molecular buffer system
context-insulates a riboswitch enabling synthetic control of colony
formation and modular signal manipulations. The riboswitch signal
is relayed to a transcriptional activation domain of a split transcription
factor, while interacting DNA-binding domains mediate the transduction
of signal and form an interacting molecular buffer. The molecular
buffer system enables modular signal inversion through integration
with repressor modules. Further, tuning of input sensitivity was achieved
through perturbation of the buffer pair ratio guided by a mathematical
model. Such buffered signal tuning networks will be useful for domestication
of RNA-based sensors enabling tunable outputs and library-wide selections
for drug discovery and metabolic engineering.
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Yendrikhovskij S, MacDonald L, Bech S, Jensen K. Enhancing colour image quality in television displays. IMAGING SCIENCE JOURNAL 2016. [DOI: 10.1080/13682199.1999.11736360] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Borregaard J, Zugenmaier M, Petersen JM, Shen H, Vasilakis G, Jensen K, Polzik ES, Sørensen AS. Scalable photonic network architecture based on motional averaging in room temperature gas. Nat Commun 2016; 7:11356. [PMID: 27076381 PMCID: PMC4834638 DOI: 10.1038/ncomms11356] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2015] [Accepted: 03/17/2016] [Indexed: 11/09/2022] Open
Abstract
Quantum interfaces between photons and atomic ensembles have emerged as powerful tools for quantum technologies. Efficient storage and retrieval of single photons requires long-lived collective atomic states, which is typically achieved with immobilized atoms. Thermal atomic vapours, which present a simple and scalable resource, have only been used for continuous variable processing or for discrete variable processing on short timescales where atomic motion is negligible. Here we develop a theory based on motional averaging to enable room temperature discrete variable quantum memories and coherent single-photon sources. We demonstrate the feasibility of this approach to scalable quantum memories with a proof-of-principle experiment with room temperature atoms contained in microcells with spin-protecting coating, placed inside an optical cavity. The experimental conditions correspond to a few photons per pulse and a long coherence time of the forward scattered photons is demonstrated, which is the essential feature of the motional averaging.
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