gebhart/patrepeval huggingface dataset:
A pH-dependent conformational transition of Aβ peptide and physicochemical properties of the conformers in the glial cell (2002)

In the present study we identified the epitopes of antibodies against amyloid β-(1–42)-peptide (Aβ1–42): 4G8 reacted with peptides corresponding to residues 17–21, 6F/3D reacted with peptides corresponding to residues 9–14, and anti 5-10 reacted with peptides corresponding to residues 5–10. The study also yielded some insight into the Aβ1–42 structures resulting from differences in pH. An ELISA study using monoclonal antibodies showed that pH-dependent conformational changes occur in the 6F/3D and 4G8 epitopes modified at pH 4.6, but not in the sequences recognized by anti 1-7 and anti 5-10. This was unique to Aβ1–40 and Aβ1–42 and did not occur with Aβ1–16 or Aβ17–42. The reactivity profile of 4G8 was not affected by blockage of histidine residues of pH-modified Aβ1–40 and Aβ1–42 with diethyl pyrocarbonate; however, the mutant [Gln11]Aβ1–40 abrogated the unique pH-dependence towards 4G8 observed with Aβ1–40. These findings suggest that these epitopes are cryptic at pH4.6, and that Glu11 is responsible for the changes. We suggest that the abnormal folding of 6F/3D epitope affected by pH masked the 4G8 epitope. A study of the binding of metal ions to Aβ1–42 suggested that Cu2+ and Zn2+ induced a conformational transition around the 6F/3D region at pH7.4, but did not affect the region when it was modified at pH4.6. However, Fe2+ had no effect, irrespective of pH. Aβ modified at pH 4.6 appeared to be relatively resistant to proteinase K compared with Aβs modified at pH7.4, and the former might be preferentially internalized and accumulated in a human glial cell. Our findings suggest the importance of microenvironmental changes, such as pH, in the early stage of formation of Aβ aggregates in the glial cell.
A comparison of doxycycline and minocycline in the treatment of acne vulgaris (1988)

A 12–week, observer‐blind, study compared doxycycline (50 mg daily) with minocycline (50 mg twice daily) in the treatment of acne vulgaris in 4.1 patients. The analysis of data on 34 patients completing the study (15 receiving doxycycline and 19 receiving minocycline) showed both treatments to be equally effective, although the use of doxycycline had the advantage of it being a once‐daily treatment regime. Doxycycline, with minimal side effects, can be recommended for the treatment of acne vulgaris.
After 2015: infectious diseases in a new era of health and development (2014)

Running over timescales that span decades or centuries, the epidemiological transition provides the central narrative of global health. In this transition, a reduction in mortality is followed by a reduction in fertility, creating larger, older populations in which the main causes of illness and death are no longer acute infections of children but chronic diseases of adults. Since the year 2000, the Millennium Development Goals (MDGs) have provided a framework for accelerating the decline of infectious diseases, backed by a massive injection of foreign investment to low-income countries. Despite the successes of the MDGs era, the inhabitants of low-income countries still suffer an enormous burden of disease owing to diarrhoea, pneumonia, HIV/AIDS, tuberculosis, malaria and other pathogens. Adding to the predictable burden of endemic disease, the threat of pandemics is ever-present and global. With a view to the future, this review spotlights five aspects of the fight against infection beyond 2015, when the MDGs will be replaced by a new set of goals for poverty reduction and sustainable development. These aspects are: exploiting the biological links between infectious and non-infectious diseases; controlling infections among the new urban majority; enhancing the response to international health threats; expanding childhood immunization programmes to prevent acute and chronic diseases in adults; and working towards universal health coverage. By scanning the wider horizon now, infectious disease specialists have the chance to shape the post-2015 era of health and development.
Localization of hRad9 in breast cancer (2008)

Finding of hyperphosphorylated forms of hRad9 in the nucleus of cancer cells is in keeping with its function in ameliorating DNA instability, whereby it inadvertently assists tumor growth.
Control of pulsatile rotary pumps without pressure sensors. (1992)

When ventricular assistance is achieved with a volumetric pump driven by an electric actuator, overpumping can cause venous collapse. To prevent this problem, pump speed must be monitored and controlled. The authors developed a regulatory system based on the current intensity signal from the electric motor. This signal is processed and compared with predicted values calculated according to a mathematical model at the beginning of each ejection phase. If a difference is detected, pump speed is adequately adjusted. The great advantage of this system is elimination of the need for an implantable pressure sensor. It requires a simple and ubiquitous electronic component, i.e., a resistor, that can be easily integrated into the motor control circuit and does not require calibration.
AGM-1470, a potent angiogenesis inhibitor, prevents the entry of normal but not transformed endothelial cells into the G1 phase of the cell cycle. (1994)

AGM-1470 is a potent angiogenesis inhibitor that is very effective in inhibiting endothelial cell proliferation in both in vitro and in vivo models and that prevents tumor growth in vivo. Although this molecule appears to be a most promising anticancer drug, its mechanism of action has not yet been elucidated. In this study, we examined the effects of AGM-1470 on the cell cycle of normal and transformed endothelial cells. We showed that AGM-1470, at picomolar concentrations, specifically inhibits the proliferation of both bovine aortic endothelial cells and human umbilical vein endothelial cells. AGM-1470 was ineffective in significantly inhibiting the proliferation of Ea.hy926 cells, a hybrid cell line obtained by the fusion of human umbilical vein endothelial cells with a human carcinoma cell line, or cEnd.1 cells, a polyoma middle T oncogene-transformed endothelioma cell line derived from mouse embryo. Using a double labeling technique with anti-Ki67 antibodies and propidium iodide, we demonstrated, with flow cytometry analysis, that AGM-1470 specifically prevents the entry of endothelial cells into the G1 phase of the cell cycle. We also showed that AGM-1470 was ineffective in inhibiting endothelial cell migration toward laminin or capillary-like tube formation inside a type I collagen matrix induced by phorbol esters. Our data strongly suggest that AGM-1470 is a molecule that specifically inhibits a cell cycle control pathway active in normal cells but which could be bypassed or altered in transformed cells.
Expression of a Cloned Human Fibrinogen cDNA in Escherichia coli : Synthesis of an A Alpha Polypeptide (1985)

The construction of a plasmid, p166.9, for the controlled synthesis of the A alpha-chain of human fibrinogen in Escherichia coli is described. The plasmid combines the tac promoter, constructed for controlled high-level peptide expression, with the promoter and signal peptide codons from an E. coli plasmid beta-lactamase gene and a cDNA of the A alpha-chain of human fibrinogen. The tac promoter is repressed in lacIQ strains of E. coli and induced by isopropylthio-beta-D-galactoside (IPTG). Protein blot analysis of lysates of cells carrying p166.9 demonstrates the IPTG-dependent synthesis of polypeptides which cross react with antisera to the A alpha-chain of human fibrinogen. The largest and predominant species corresponds to an apparent molecular weight of 63,000. When the cell growth media or cell lysates are treated with thrombin, the enzyme which normally releases fibrinopeptide A (FPA) from the A alpha-chain, FPA-like peptides are detectable by radioimmunoassay with antiserum prepared against human FPA. Thrombin-treated cell growth media prepared 4 hr after IPTG induction contained 340 ng/ml of FPA-like material; using a mass ratio of 40 for FPA to A alpha, this indicates that the A alpha-peptide concentration in the culture media is 13 micrograms/ml.
Isobatzellines A, B, C, and D. Cytotoxic and antifungal pyrroloquinoline alkaloids from the marine sponge Batzella sp (1990)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIsobatzellines A, B, C, and D. Cytotoxic and antifungal pyrroloquinoline alkaloids from the marine sponge Batzella spHao H. Sun, Shinichi Sakemi, Neal Burres, and Peter McCarthyCite this: J. Org. Chem. 1990, 55, 16, 4964–4966Publication Date (Print):August 1, 1990Publication History Published online1 May 2002Published inissue 1 August 1990https://doi.org/10.1021/jo00303a043Request reuse permissionsArticle Views446Altmetric-Citations94LEARN 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 InReddit PDF (426 KB) Get e-AlertscloseSupporting Info (1)»Supporting Information Supporting Information Get e-Alerts
Effects of Vitamin E and Glutathione on Glucose Metabolism (1999)

Vitamin E is an antioxidant that has been demonstrated to improve insulin action. Glutathione, another natural antioxidant, may also be important in blood pressure and glucose homeostasis, consistent with the involvement of free radicals in both essential hypertension and diabetes mellitus. Our group has recently suggested that the effects of reduced glutathione on glucose metabolism may be mediated, at least in part, by intracellular magnesium levels (Mg([i])). Recent evidence suggests that vitamin E enhances glutathione levels and may play a protective role in magnesium deficiency-induced cardiac lesions. To directly investigate the effects of vitamin E supplementation on insulin sensitivity in hypertension, in relation to the effects on circulating levels of reduced (GSH) and oxidized (GSSG) glutathione and on Mg([i]), we performed a 4-week, double-blind, randomized study of vitamin E administration (600 mg/d) versus placebo in 24 hypertensive patients and measured whole-body glucose disposal (WBGD) by euglycemic glucose clamp, GSH/GSSG ratios, and Mg([i]) before and after intervention. The relationships among WBGD, GSH/GSSG, and Mg([i]) in both groups were evaluated. In hypertensive subjects, vitamin E administration significantly increased WBGD (25.56+/-0.61 to 31.75+/-0.53 micromol/kg of fat-free mass per minute; P<0.01), GSH/GSSG ratio (1.10+/-0.07 to 1.65+/-0.11; P<0.01), and Mg([i]) (1.71+/-0.042 to 1.99+/-0.049 mmol/L; P<0.01). In basal conditions, WBGD was significantly related to both GSH/GSSG ratios (r=0.58, P=0.047) and Mg([i]) (r=0.78, P=0.003). These data show a clinical link between vitamin E administration, cellular magnesium, GSH/GSSG ratio, and tissue glucose metabolism. Further studies are needed to explore the cellular mechanism(s) of this association.
Dietary omega-3 and polyunsaturated fatty acids modify fatty acyl composition and insulin binding in skeletal-muscle sarcolemma. (1994)

Feeding animals with diets high in saturated fat induces insulin resistance, and replacing saturated fat isocalorically with poly-unsaturated fat, especially long-chain omega-3 fatty acids, will prevent the development of insulin resistance in skeletal-muscle tissue. To investigate the mechanism, rats were fed on high-fat (20%, w/w) semipurified diets for 6 weeks. Diets containing ratios of polyunsaturated/saturated (P/S) fatty acid of 0.25 (low-P/S diet) and 1.0 (high-P/S diet) were used to study the effect of the level of saturated fat. To study the effects of omega-3 fatty acids, diets with a low-P/S ratio containing either 0 (low-omega-3 diet) or 3.3% (high-omega-3 diet) long-chain omega-3 fatty acids from fish oil were fed. Plasma membrane from skeletal muscle was purified. The content of fatty acids in sarcolemmal phospholipid was significantly related to the dietary composition. Insulin binding to intact sarcolemmal vesicles prepared from rats fed on diets high in omega-3 fatty acids increased 14-fold compared with animals fed on the low-omega-3 diet (P < 0.0001). Feeding rats on a diet with a high P/S ratio increased sarcolemmal insulin binding by 2.3-fold (P < 0.05). Increased insulin binding was due to increased receptor number at the low-affinity high-capacity binding site. Dietary effects on insulin binding were eliminated when studies were carried out on detergent-solubilized membranes, indicating the importance of the phospholipid fatty acyl composition for insulin binding. The results suggest that dietary omega-3 and polyunsaturated fatty acids increase insulin binding to sarcolemma by changing the fatty acyl composition of phospholipid surrounding the insulin receptor, and this might be the mechanism by which dietary fatty acids modify insulin action.
Immediate postoperative management. (1993)

The management of the patient after valvular surgery is influenced by the preoperative left ventricular function and by the specific type of valvular lesion that has been corrected. The hemodynamics of the patient immediately after surgery must be evaluated carefully, and the patient can be supported with a variety of pharmacologic and mechanical measures as ventricular function recovers. Perioperative ischemia, arrhythmias, and bleeding may occur and should be specifically treated. Initiation of anticoagulation and adjustment of warfarin doses is an important aspect of postoperative care. Finally, the patient needs to be counseled that the presence of a prosthetic valve carries a risk for infective endocarditis and instructed on appropriate regimens for antibiotic prophylaxis.
Effect of γ‐mangostin through the inhibition of 5‐hydroxytryptamine2A receptors in 5‐fluoro‐α‐methyltryptamine‐induced head‐twitch responses of mice (1998)

1. Intracerebronventricular (i.c.v.) injection of gamma-mangostin (10-40 nmol/mouse), a major compound of the fruit hull of Garcinia mangostana Lin., like ketanserin (10, 20 nmol/mouse, i.c.v.) inhibited 5-fluoro-alpha-methyltryptamine (5-FMT) (45 mg kg(-1), i.p.)-induced head-twitch response in mice in the presence or absence of citalopram (a 5-hydroxytryptamine (5-HT)-uptake inhibitor). 2. Neither the 5-FMT- nor the 8-hydroxy-2-(di-n-propylamino)tetralin (5-HT1A-agonist)-induced 5-HT syndrome (head weaving and hindlimb abduction) was affected by gamma-mangostin or ketanserin. 3. The locomotor activity stimulated by 5-FMT through the activation of alpha1-adrenoceptors did not alter in the presence of gamma-mangostin. 4. 5-HT-induced inositol phosphates accumulation in mouse brain slices was abolished by ketanserin. Gamma-mangostin caused a concentration-dependent inhibition of the inositol phosphates accumulation. 5. Gamma-mangostin caused a concentration-dependent inhibition of the binding of [3H]-spiperone, a specific 5-HT2A receptor antagonist, to mouse brain membranes. 6. Kinetic analysis of the [3H]-spiperone binding revealed that gamma-mangostin increased the Kd value without affecting the Bmax value, indicating the mode of the competitive nature of the inhibition by gamma-mangostin. 7. These results suggest that gamma-mangostin inhibits 5-FMT-induced head-twitch response in mice by blocking 5-HT2A receptors not by blocking the release of 5-HT from the central neurone. Gamma-mangostin is a promising 5-HT2A receptor antagonist in the central nervous system.
A Novel 1T-1D DRAM Cell for Embedded Application (2012)

A novel one transistor and one diode (1T-1D) dynamic random access memory cell for embedded applications is proposed. This memory cell consists of a floating-gate (FG) MOSFET and a gated diode. The anode of the diode is connected to the FG, so that the threshold voltage of the FG MOSFET can be modulated by the current through the diode. In this paper, basic device operations, speed, retention, and disturb performance are investigated using Silvaco technology computer-aided design simulation tools. The process compatibility is also investigated by integrating the memory array and specific sense amplifier.
Marek's Disease: Effects of B Histocompatibility Alloalleles in Resistant and Susceptible Chicken Lines (1977)

Lines of chickens selected from a common ancestral population for either resistance or susceptibility to Marek's disease developed contrasting frequencies of particular B alloalleles. Comparison of inoculated sibs in backcross-families revealed that the B alloalleles characterizing the two lines accounted for an eightfold difference in tumor incidence. This genetic difference in tumorigenesis associated with the alloalleles of the major histocompatibility complex is probably expressed through the cell-mediated immune system.
Digitalfilter (1997)

ZusammenfassungDer Begriff Filter im Sinne der Elektrotechnik stammt aus der analogen Signalverarbeitung. Filter dienen allgemein dazu, elektrische Signale von einer Form in eine andere zu überführen; speziell erfüllen sie aber meistens die Funktion, aus einem Frequenzgemisch bestimmte Spektralbereiche herauszuholen oder sie zu unterdrücken. Infomationstheoretisch stellt die Filterung die Faltung eines beliebigen, zeitabhängigen Signals mit der Stoßantwort des Filters dar. Die Theorie der klassischen analogen Filter existiert seit vielen Jahrzehnten, hat sich ständig weiterentwickelt und soll nicht Thema dieses Kapitels sein.
Real-Time PCR Fluorescent Chemistries (2007)

There are more than a dozen formats available for the fluorescent detection of amplified DNA in kinetic (real-time) PCR. These chemistries are adaptable to most real-time PCR instruments and may offer benefits over the usual manufacturer-recommended chemistries for the instrument. The most popular chemistries are the generic dye, SYBR Green I, TaqMan, and hybridization probes. However, there are now new dyes being reported with superior fluorescent detection and product resolution; as well as new probe formats that may offer advanced multiplexing opportunities for quantification and genotyping.
Successful pregnancies in women following single autotransplant for acute myeloid leukemia with a chemotherapy ablation protocol. (1994)

Of 30 women surviving a minimum of 18 months following treatment for AML with a high-dose chemotherapy regimen with autologous bone marrow transplantation (ABMT), 24 were premenopausal at the time of transplantation. All were given a detailed questionnaire concerning menstruation, menopausal symptoms and pregnancy; 22 responded. Of these 22, 10 had received a single transplant procedure and 12 a double transplant procedure. In the 10 recipients of a single transplant, 4 women (age range 32-50 years) developed ovarian failure and 6 (age range 21-32 years) resumed spontaneous cyclical menstruation. Five of the 6 menstruating women became pregnant between 4 and 40 months following ABMT. Three pregnancies went to term and each resulted in the delivery of a full-term apparently normal infant. Of the 12 women who received a double ABMT (age range 32-47 years), 11 developed clinical and/or biochemical evidence of ovarian failure. The median age in the latter group was 35 years, however, compared with 28 years in the single ABMT group. These data show that it is possible to give a single very high-dose course of chemotherapy in younger patients without compromising fertility.
Multivalent Drug Design and Inhibition of Cholera Toxin by Specific and Transient Protein–Ligand Interactions (2008)

Multivalent inhibitors of the cholera toxin B pentamer are potential therapeutic drugs for treating cholera and serve as models for demonstrating multivalent ligand effects through a structure-based approach. A crucial yet often overlooked aspect of multivalent drug design is the length, rigidity and chemical composition of the linker used to connect multiple binding moieties. To specifically study the role of chemical linkers in multivalent ligand design, we have synthesized a series of compounds with one and two binding motifs connected by several different linkers. These compounds have affinity for and potency against the cholera toxin B pentamer despite the fact that none can simultaneously bind two toxin receptor sites. Results from saturation transfer difference NMR reveal transient, non-specific interactions between the cholera toxin and linker groups contribute significantly to overall binding affinity of monovalent compounds. However, the same random protein-ligand interactions do not appear to affect binding of bivalent molecules. Moreover, the binding affinities and potencies of these 'non-spanning' bivalent ligands appear to be wholly independent of linker length. Our detailed analysis identifies multiple effects that account for the improved inhibitory potencies of bivalent ligands and suggest approaches to further improve the activity of this class of compounds.
Solid Freeform Fabrication of Thin‐Walled Ceramic Structures Using an Electrohydrodynamic Jet (2006)

A printing device, which operates on an electrohydrodynamic principle, was used to deposit 100 layers of a 10 vol% zirconia suspension. Thus, a wall ∼100 μm in thickness was freeformed. The wall thickness achieved in this work is almost 30% less than that of similar structures built by ink‐jet printing and therefore we demonstrate a novel print deposition based solid freeform fabrication method, which can be developed further for preparing fine ceramic structures.
Drug transfer across the blood‐brain barrier and improvement of brain delivery (1999)

The blood-brain barrier is formed by the endothelial cells of the brain capillaries. Its primary characteristic is the impermeability of the capillary wall due to the presence of complex tight junctions and a low endocytic activity. Essential nutrients are delivered to the brain by selective transport mechanisms, such as the glucose transporter and a variety of amino acid transporters. Although most drugs enter the brain by passive diffusion through the endothelial cells depending on their lipophilicity, degree of ionization, molecular weight, relative brain tissue and plasma bindings, some others can use specific endogenous transporters. In such cases, binding competition on the transporter with endogenous products or nutrients can occur and limits drug transfer. The blood-brain barrier can be a major impediment for the treatment of diseases of the central nervous system, since many drugs are unable to reach this organ at therapeutic concentrations. Various attempts have been made to overcome the limiting access of drugs to the brain, e.g. chemical modification, development of more hydrophobic analogs or linking an active compound to a specific carrier. Transient opening of the blood-brain barrier in humans has been achieved by intracarotid infusion of hypertonic mannitol solutions or of bradykinin analogs. Another way to increase or decrease brain delivery of drugs is to modulate the P-glycoprotein (P-gp) whose substrates are actively pumped out the cell into the capillary lumen. Many P-gp inhibitors or inducers are available to enhance the therapeutic effects of centrally acting drugs or to decrease central adverse effects of peripherally active drugs.
RTCP message for Receiver Estimated Maximum Bitrate (2013)

This document proposes an RTCP message for use in experimentally-
deployed congestion control algorithms for RTP-based media flows. It
also describes an absolute-value timestamp option for use in bandwidth
estimatoin.