gebhart/patrepeval huggingface dataset:
Epidermal Growth Factor (EGF) Receptor-dependent ERK Activation by G Protein-coupled Receptors (2001)

"Transactivation" of epidermal growth factor receptors (EGFRs) in response to activation of many G protein-coupled receptors (GPCRs) involves autocrine/paracrine shedding of heparin-binding EGF (HB-EGF). HB-EGF shedding involves proteolytic cleavage of a membrane-anchored precursor by incompletely characterized matrix metalloproteases. In COS-7 cells, alpha(2A)-adrenergic receptors (ARs) stimulate ERK phosphorylation via two distinct pathways, a transactivation pathway that involves the release of HB-EGF and the EGFR and an alternate pathway that is independent of both HB-EGF and the EGFR. We have developed a mixed culture system to study the mechanism of GPCR-mediated HB-EGF shedding in COS-7 cells. In this system, alpha(2A)AR expressing "donor" cells are co-cultured with "acceptor" cells lacking the alpha(2A)AR. Each population expresses a uniquely epitope-tagged ERK2 protein, allowing the selective measurement of ERK activation in the donor and acceptor cells. Stimulation with the alpha(2)AR selective agonist UK14304 rapidly increases ERK2 phosphorylation in both the donor and the acceptor cells. The acceptor cell response is sensitive to inhibitors of both the EGFR and HB-EGF, indicating that it results from the release of HB-EGF from the alpha(2A)AR-expressing donor cells. Experiments with various chemical inhibitors and dominant inhibitory mutants demonstrate that EGFR-dependent activation of the ERK cascade after alpha(2A)AR stimulation requires Gbetagamma subunits upstream and dynamin-dependent endocytosis downstream of HB-EGF shedding and EGFR activation, whereas Src kinase activity is required both for the release of HB-EGF and for HB-EGF-mediated ERK2 phosphorylation.
On the Quantification of Lignin Hydroxyl Groups With31P and13C NMR Spectroscopy (2015)

Factors affecting the accuracy of the analysis of lignin hydroxyl and carboxyl groups with 31P NMR have been further elucidated. Two modifications of 31P NMR analysis of lignin, namely the protocols using 1,3,2-dioxaphospholane (PR-I) and 2-chloro-4,4,5,5-tetramethyl-1,3,2-dioxaphospholane (PR-II) as phosphorylation reagents with different internal standards, were studied. The previous 31P NMR standard protocol with PR-II underestimated OH groups by about 30%, whereas the 31P NMR standard protocol with PR-I tended to produce overestimated data. It has been shown that cholesterol is not an appropriate internal standard, resulting in underestimated values for OH groups due to incomplete baseline resolution. The best internal standard has been found to be endo-N-hydroxy-5-norbornene-2,3-dicarboximide. Strong care should be taken related to the stability of the internal standards to avoid inflated results due to IS degradation. Under modified optimized conditions, both methods show a good correlation with the 13C NMR protocol in the quantification of hydroxyl groups as average, with the variability between the methods in the range of 5–15%. However, the 31P NMR protocols report COOH content that is twice as low as that of 13C NMR data. Finally, the best approach for the use of the 31P and 13C NMR methods in lignin analysis is discussed.
Microdroplet mixing for rapid reaction kinetics with Raman spectrometric detection (1983)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMicrodroplet mixing for rapid reaction kinetics with Raman spectrometric detectionStanley F. Simpson, James R. Kincaid, and F. James. HollerCite this: Anal. Chem. 1983, 55, 8, 1420–1422Publication Date (Print):July 1, 1983Publication History Published online1 May 2002Published inissue 1 July 1983https://pubs.acs.org/doi/10.1021/ac00259a054https://doi.org/10.1021/ac00259a054research-articleACS PublicationsRequest reuse permissionsArticle Views151Altmetric-Citations18LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts
Cloning of a new type II cytokine receptor activating signal transducer and activator of transcription (STAT)1, STAT2 and STAT3 (2003)

In the present paper, we report the identification of a new gene encoding a transmembrane protein of 520 amino acids, showing 22% amino acid identity with the extracellular domain of the interleukin (IL)-20 receptor. This gene, termed likely interleukin or cytokine receptor-2 ( LICR2 ), is located on chromosome 1, at 25 kb from the IL22R (IL-22 receptor) gene, and is constitutively expressed in most tissues. A chimaeric receptor, consisting of the extracellular domain of the IL-10 receptor alpha chain and the intracellular domain of LICR2, activated signal transducer and activator of transcription (STAT)1, STAT2, STAT3 and STAT5 upon IL-10 stimulation, in a Janus kinase 1-dependent manner. In contrast, none of the IL-10-related cytokines described so far could activate LICR2-transfected cells, suggesting that LICR2 is a signalling receptor for a new cytokine of the IL-10 family.
beta-Alanine auxotrophy associated with dfp, a locus affecting DNA synthesis in Escherichia coli (1988)

Strains containing the conditional-lethal dfp-707 mutation, which have a defect in DNA synthesis at 42 degrees C, were found to require either pantothenate or its precursor, beta-alanine, for growth at 30 degrees C. The auxotrophy and conditional lethality were corevertible. Through localized mutagenesis of the dfp-pyrE region of Escherichia coli, another mutation, dfp-1, was obtained. It conferred the auxotrophy but not the conditional lethality of dfp-707. Complementation analysis, performed with a set of plasmid-borne deletion and insertion mutations, revealed a correspondence between the complementation of each mutant phenotype and the production of the dfp gene product, previously identified as a 45-kilodalton flavoprotein. The dfp mutants had a normal level of aspartate-1-decarboxylase, which is the only enzyme known to produce beta-alanine in E. coli and which is specified by the distant panD gene. A prototrophic pseudorevertant of a dfp-1 strain was found to have retained the dfp mutation, to be genetically unstable, and to have an elevated level of aspartate-1-decarboxylase, suggesting that it had acquired a duplication of panD. It is not known what steps in pantothenate or DNA metabolism are affected by the mutant dfp product or how its flavin moiety may be involved.
Polymerization and viscoelastic behavior of networks from a dual-curing, liquid crystalline monomer (1999)

The network formation and viscoelastic behavior of a liquid crystalline monomer, whose structure includes both acrylate and acetylene reactive groups, have been studied. By combining both photo and thermal polymerization, the networks can be formed in two separate steps, with the initial photopolymerization dominated by acrylate crosslinking and subsequent thermal polymerization dominated by acetylene crosslinking. In addition, the monomer exhibits a liquid crystalline phase. Photopolymerization while in the liquid crystal phase locks in the molecular ordering. Dynamic mechanical analysis shows that networks formed from the liquid crystalline phase have lower crosslink densities and narrower distributions of molecular weights between crosslinks when compared to networks formed from the isotropic phase (and at higher polymerization temperatures). After thermal postcure at 250°C, the networks formed from the isotropic monomer have a 23% higher dynamic mechanical storage modulus (in the glassy state) than the networks formed from the liquid crystalline monomer. The thermally postcured networks have unusually high glass-transition temperatures, which exceed 300°C. © 1999 John Wiley & Sons, Inc. J Polym Sci B: Polym Phys 37: 1183–1190, 1999
Freestanding lipid bilayers as substrates for electron cryomicroscopy of integral membrane proteins (2002)

Phospholipid bilayers, 40 A thick, were generated as electron microscope substrates by submerging copper grids overlaid with holey plastic through a lipid monolayer on a water surface. Previously formed proteoliposomes containing single-particle membrane proteins in their bilayers were then fused into the newly formed bilayer substrate. To demonstrate this methodology, multi-drug resistance protein P-glycoprotein was incorporated into these bilayers and imaged by fixed beam microscopy and scanning transmission electron microscopy.
Overexpression of NDC80 is correlated with prognosis of pancreatic cancer and regulates cell proliferation. (2015)

These results demonstrated that NDC80 plays an essential role in the tumorigenesis of pancreatic cancer, and might serve as potential prognostic and therapeutic target for treatment of pancreatic cancer.
Carbonic Anhydrase:  Evolution of the Zinc Binding Site by Nature and by Design (1996)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCarbonic Anhydrase: Evolution of the Zinc Binding Site by Nature and by DesignDavid W. Christianson and Carol A. FierkeView Author Information Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323 Department of Biochemistry, Box 3711, Duke University Medical Center, Durham, North Carolina 27710 Cite this: Acc. Chem. Res. 1996, 29, 7, 331–339Publication Date (Web):July 11, 1996Publication History Received18 December 1995Published online11 July 1996Published inissue 11 July 1996https://pubs.acs.org/doi/10.1021/ar9501232https://doi.org/10.1021/ar9501232research-articleACS PublicationsCopyright © 1996 American Chemical SocietyRequest reuse permissionsArticle Views3761Altmetric-Citations408LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose SUBJECTS:Ligands,Metals,Monomers,Peptides and proteins,Zinc Get e-Alerts
Type I Interferon as a Link Between Innate and Adaptive Immunity through Dendritic Cell Stimulation (2003)

Type I interferon (IFN-alpha/beta) is expressed rapidly after infection and plays a key role in innate defense against pathogens. Recent studies have shown that a connection exists between IFN-alpha/beta and antigen-presenting dendritic cells (DCs) at two levels. Firstly, a specific DC precursor, the plasmacytoid pre-DC (p-preDC), was identified as a cell type able to secrete very high amounts of IFN-alpha/beta following stimulation with infectious agents. Secondly, IFN-alpha/beta has been shown to act as a differentiation/maturation factor for DCs. These findings will be discussed in association with evidence indicating that IFN-alpha/beta can enhance and modulate immune responses in vivo. Taken together, the available data suggest that IFN-alpha/beta serves as a link between the innate response to infection and the adaptive immune response.
Motion correction with PROPELLER MRI: Application to head motion and free-breathing cardiac imaging (1999)

A method for motion correction, involving both data collection and reconstruction, is presented. The PROPELLER MRI method collects data in concentric rectangular strips rotated about the k-space origin. The central region of k-space is sampled for every strip, which (a) allows one to correct spatial inconsistencies in position, rotation, and phase between strips, (b) allows one to reject data based on a correlation measure indicating through-plane motion, and (c) further decreases motion artifacts through an averaging effect for low spatial frequencies. Results are shown in which PROPELLER MRI is used to correct for bulk motion in head images and respiratory motion in nongated cardiac images. Magn Reson Med 42:963-969, 1999.
The zinc-containing high Km cyclic nucleotide phosphodiesterase of bakers' yeast. (1983)

The high Km cyclic nucleotide phosphodiesterase of Saccharomyces cerevisiae was purified by an improved procedure. Its amino acid composition is reported. Its pI is 5.85 +/- 0.1. Sedimentation equilibrium analysis of the native enzyme gave Mr = 88,000 +/- 6,000, whilst gel electrophoresis in the presence of dodecyl sulfate gave a molecular weight of 43,000, indicating that the enzyme is a dimer. Preparations of 94 +/- 4% purity contained about 2.4 atoms of zinc/43,000 daltons. Inactivation of the enzyme by 8-hydroxyquinoline was accompanied by removal of about 2 zinc atoms per monomer. Partially inactivated enzyme regained activity during dialysis against zinc, or, with less effect, cobalt salts. 8-Hydroxyquinoline (Ki = 1.1 mM) and 1,10-phenanthroline (Ki = 0.6 mM) were competitive inhibitors. The enzyme was also inhibited by the nonchelating 1,7-and 4,7-phenanthrolines and by thiols and KCN, but not by NaN3. These inhibitors probably act by binding to, but not chelating, enzyme-bound zinc.
Modeling the Spread of Influence on the Blogosphere (2006)

Blogs have become a means by which new ideas and information spreads rapidly on the web. They often discuss the latest trends and echo with reactions on different events in the world. The collective wisdom present on the blogosphere is invaluable for market researchers and companies launching new products. In this paper, we validate the effectiveness of some of the influence models on the blogosphere. We validate the robustness of different heuristics in presence of splogs or spam blogs on the web. Experiments also show how PageRank based heuristics could be used to select an influential set of bloggers such that we could maximize the spread of information on the blogosphere.
Loss of tumorigenicity of rat glioblastoma directed by episome-based antisense cDNA transcription of insulin-like growth factor I. (1992)

Malignant glioma is the most common brain tumor. The molecular basis of glioma tumorigenicity has not been defined. Cultured glioma cells accumulate high levels of insulin-like growth factor I (IGF-I) transcripts. We asked whether IGF-I expression is coupled to tumorigenicity, using a combined in vivo/in vitro system employing antisense RNA for IGF-I. An antisense IGF-I expression construct in an expression vector that incorporates Epstein-Barr virus replicative signals and the ZnSO4-inducible metallothionein I transcriptional promoter was assembled. Stable glioma transfectants were derived from C6 glioma cells, which constitutively express IGF-I. B-104 neuroblastoma cells, derived originally from the same tumor but not expressing IGF-I, were also transfected as controls. In the absence of ZnSO4, the C6 transfectants expressed high levels of IGF-I mRNA and protein as detected by in situ hybridization and immunocytochemistry, respectively. Addition of ZnSO4 in the culture medium resulted in high levels of antisense transcript accumulation and dramatically decreased levels of endogenous IGF-I mRNA and IGF-I protein. Subcutaneous injection of either nontransfected C6 parental cells or C6 cells transfected with vector without IGF-I sequences into rats resulted in large tumors after 2 weeks, as did transfected and nontransfected B-104 cells. However, the rats injected with transfected C6 cells yielded no tumors after 40 weeks of observation. Two weeks after injection of the transfected C6 cells a small cyst was apparent in six rats. Histologic sections revealed a few glioma cells infiltrated by a large number of mononuclear cells. No infiltration of mononuclear cells was apparent in the glioma tumors resulting from injection of parental (nontransfected) cells, suggesting that the parental cells, but not the antisense IGF-I transfectants, escape the host immune response.
Online Discriminative Kernel Density Estimator With Gaussian Kernels (2013)

We propose a new method for a supervised online estimation of probabilistic discriminative models for classification tasks. The method estimates the class distributions from a stream of data in the form of Gaussian mixture models (GMMs). The reconstructive updates of the distributions are based on the recently proposed online kernel density estimator (oKDE). We maintain the number of components in the model low by compressing the GMMs from time to time. We propose a new cost function that measures loss of interclass discrimination during compression, thus guiding the compression toward simpler models that still retain discriminative properties. The resulting classifier thus independently updates the GMM of each class, but these GMMs interact during their compression through the proposed cost function. We call the proposed method the online discriminative kernel density estimator (odKDE). We compare the odKDE to oKDE, batch state-of-the-art kernel density estimators (KDEs), and batch/incremental support vector machines (SVM) on the publicly available datasets. The odKDE achieves comparable classification performance to that of best batch KDEs and SVM, while allowing online adaptation from large datasets, and produces models of lower complexity than the oKDE.
An assessment of the total cost of pancreatic cancer using real-world evidence. (2020)

773 Background: The aggregate health economic implications of pancreatic cancer are poorly understood, especially from the patient perspective. As a preliminary effort, we sought to better understand changes in type and quantity of medical expenditures over time, along with quality of life related costs, from this perspective. This preliminary research is part of a larger effort to understand how the introduction of new treatments affect both the outcome and costs of pancreatic cancer associated with care, patients, survivors, their families, and their communities. Methods: We analyzed patient-level data from the Medical Expenditure Panel Survey (MEPS, 1996- 2017). All analyses were performed using R version 3.6.1 on Ubuntu 19.04. Averages were computed for the total health care costs, including prescription drug costs. Average individual annual cost estimates for the second year excluded individuals that were identified as having died prior to the first round of data collection in the second year. The individual patient level ratios of prescription drug cost to other medical expenses was also computed. All expenditures are adjusted for inflation using 2017 US dollars. Included subjects, N= 80 had a diagnosis of pancreatic cancer and available prescription data. Individual age and employment status were accounted for as covariates. Results: Between 1997 and 2017 inflation adjusted first and second year non-medication spending on pancreatic cancer care averaged $66,999.96 and $105,308.60 respectively. However, inflation-adjusted first and second year charges for hospitalizations and emergency visits fell between 2007-2017. Prescription drug as a proportion of total spending prescription drugs increased during the same time period. Lost work/school days declined between 2007 and 2017. Conclusions: Total inflation adjusted pancreatic cancer care expenses declined over the past decade even as drug costs increased. Quality of life costs declined as well. Further analysis is needed to evaluate the relationship between drug spending, total cost of care and quality of life.
The Epidermal Growth Factor Receptor as a Therapeutic Target in Glioblastoma Multiforme and other Malignant Neoplasms (2009)

The epidermal growth factor receptor (EGFR) is dysregulated in various tumour types such as glioblastoma multiforme (GBM), breast cancer, ovarian carcinoma, non-small cell lung cancer and other cancers. As the intracellular tyrosine kinase of the EGFR activates signalling cascades leading to cell proliferation, angiogenesis and inhibition of apoptosis, the EGFR represents an attractive target in cancer therapy. In GBM which is the most common primary central nervous system tumour in adults, the EGFR is overexpressed in about 40 to 50% of cases, and almost half of these co-express the mutant receptor subtype EGFRvIII. This EGFR variant is constitutively activated, and thereby may contribute to the aggressive and refractory course of GBM which is associated with a median survival of only 40 to 60 weeks from diagnosis. Various trials are ongoing focusing on EGFR and EGFRvIII as new therapeutic targets in GBM. Anti-EGFR monoclonal antibodies (MAbs), e.g. cetuximab, and tyrosine kinase inhibitors (TKIs), e.g. erlotinib and gefitinib, are the most advanced in clinical development. Several trials are investigating MAbs or TKIs in combination with other agents such as inhibitors of the mammalian target of rapamycin. Other still preliminary approaches targeting the EGFR are small interfering RNA, antisense RNA and ribozymes, which lead to degradation of EGFR mRNA. Further studies are needed to define their clinical potential, to identify biological predictors of response and thus to characterize subgroups of patients who will benefit from treatment with these new agents.
Synthesis of 2‐chloro‐2‐imidazoline and its reactivity with aromatic amines, phenols, and thiophenols (1974)

Abstract 2‐Chloro‐2‐imidazoline has been synthesized by the reaction of ethylene‐thiourea with chlorine in aqueous solution at 50°. The compound was reacted with aromatic amines, phenols, and thiophenols.