Intracellular NAD+ levels are associated with LPS-induced TNF-α release in pro-inflammatory macrophages

Bacterial lipopolysaccharide induces changes in intracellular NAD+ levels in a pro-inflammatory, but not an anti-inflammatory, macrophage model that are correlated with the release of the pro-inflammatory cytokine tumour necrosis factor-α (TNF-α).</jats:p

Catastrophic NAD+ Depletion in Activated T Lymphocytes through Nampt Inhibition Reduces Demyelination and Disability in EAE

Nicotinamide phosphoribosyltransferase (Nampt) inhibitors such as FK866 are potent inhibitors of NAD+ synthesis that show promise for the treatment of different forms of cancer. Based on Nampt upregulation in activated T lymphocytes and on preliminary reports of lymphopenia in FK866 treated patients, we have investigated FK866 for its capacity to interfere with T lymphocyte function and survival. Intracellular pyridine nucleotides, ATP, mitochondrial function, viability, proliferation, activation markers and cytokine secretion were assessed in resting and in activated human T lymphocytes. In addition, we used experimental autoimmune encephalomyelitis (EAE) as a model of T-cell mediated autoimmune disease to assess FK866 efficacy in vivo. We show that activated, but not resting, T lymphocytes undergo massive NAD+ depletion upon FK866-mediated Nampt inhibition. As a consequence, impaired proliferation, reduced IFN-γ and TNF-α production, and finally autophagic cell demise result. We demonstrate that upregulation of the NAD+-degrading enzyme poly-(ADP-ribose)-polymerase (PARP) by activated T cells enhances their susceptibility to NAD+ depletion. In addition, we relate defective IFN-γ and TNF-α production in response to FK866 to impaired Sirt6 activity. Finally, we show that FK866 strikingly reduces the neurological damage and the clinical manifestations of EAE. In conclusion, Nampt inhibitors (and possibly Sirt6 inhibitors) could be used to modulate T cell-mediated immune responses and thereby be beneficial in immune-mediated disorders

In-process inspection system development for gas-fired reheat furnaces

This report summarizes development on an infrared temperature measurement system for real-time temperature monitoring of steel slabs within a gas-fired reheat furnace. The main objective of this project was to develop a new type of temperature measurement system, which will considerably improve the current state of the reheat furnace control technology, by means of accurate and direct measurement of individual steel slabs within a furnace.

Adhesion of human platelets to serum amyloid A

Serum amyloid A (SAA) is an acute phase reactant, and its level in the blood Is elevated to 1000-fold in response of the body to trauma, infection, inflammation, and neoplasia. SAA was reported to inhibit platelet aggregation and to induce adhesion of leukocytes. This study looked at adhesion of human platelets to SAA. Immobilized SAA supported the adhesion of human washed platelets; level of adhesion to SAA was comparable to fibronectin and lower than to fibrinogen. Adhesion to SAA was further enhanced by Mn2+ and the physiological agonist, thrombin. Platelet adhesion to SAA was completely abolished by anti-SAA antibody. SAA-induced adhesion was Inhibited by antibodies against the Integrin receptor alphaIIbbeta3, by the peptide GRGDSP and by SAA-derived peptide containing YIGSR-like and RGD-like adhesion motifs (amino acids 29 to 42). Adhesion was not inhibited by control immunoglobulin G, by antibody against the integrin receptor alphaVbeta3, by the peptide GRGESP, and by SAA-derived peptide that includes incomplete RGD motif. SAA-derived peptide 29 to 42 also Inhibited platelet adhesion to fibronectin. Transfected human melanoma cells expressing alphaIIbbeta3 adhered to SAA, whereas transfected cells expressing alphaVbeta3 did not. By using flow cytometry the alphaIIbbeta3 cells displayed significantly higher levels of binding of soluble SAA than the alphaVbeta3 cells. These data indicate that human platelets specifically adhere to SAA in an RGD- and alphaIIbbeta3-dependent manner. Thus, SAA may play a role In modulating platelet adhesion at vascular Injury sites by sharing platelet receptors with other platelet- adhesive proteins. (C) 2002 by The American Society of Hematology

Blood

Serum amyloid A (SAA) is an acute phase reactant, and its level in the blood Is elevated to 1000-fold in response of the body to trauma, infection, inflammation, and neoplasia. SAA was reported to inhibit platelet aggregation and to induce adhesion of leukocytes. This study looked at adhesion of human platelets to SAA. Immobilized SAA supported the adhesion of human washed platelets; level of adhesion to SAA was comparable to fibronectin and lower than to fibrinogen. Adhesion to SAA was further enhanced by Mn2+ and the physiological agonist, thrombin. Platelet adhesion to SAA was completely abolished by anti-SAA antibody. SAA-induced adhesion was Inhibited by antibodies against the Integrin receptor alphaIIbbeta3, by the peptide GRGDSP and by SAA-derived peptide containing YIGSR-like and RGD-like adhesion motifs (amino acids 29 to 42). Adhesion was not inhibited by control immunoglobulin G, by antibody against the integrin receptor alphaVbeta3, by the peptide GRGESP, and by SAA-derived peptide that includes incomplete RGD motif. SAA-derived peptide 29 to 42 also Inhibited platelet adhesion to fibronectin. Transfected human melanoma cells expressing alphaIIbbeta3 adhered to SAA, whereas transfected cells expressing alphaVbeta3 did not. By using flow cytometry the alphaIIbbeta3 cells displayed significantly higher levels of binding of soluble SAA than the alphaVbeta3 cells. These data indicate that human platelets specifically adhere to SAA in an RGD- and alphaIIbbeta3-dependent manner. Thus, SAA may play a role In modulating platelet adhesion at vascular Injury sites by sharing platelet receptors with other platelet- adhesive proteins. (C) 2002 by The American Society of Hematology

Clinical Quality and Patient Experience in the Adult Ambulatory Setting

© 2018, The Author(s) 2018. Quality and patient experience are important dimensions of care delivery. The extent to which they are related in the adult outpatient setting is unknown. This brief study utilized data from a large integrated health system over a 1-year period in 2015 and measured the degree of correlation between physicians’ patient experience scores and 8 standardized quality metrics. These quality measures were paired into similar groups to create 4 composite measures: outcome, screening, vaccination, and adherence. Measures of outcome (r = 0.20, P =.06), vaccination (r = 0.12, P =.26), and adherence (r = −0.04, P =.75) were not significantly correlated with patient experience; screening (r = 0.29, P =.006) was minimally correlated with patient experience. Overall, this study found minimal correlation between measures of patient experience and clinical quality in the outpatient setting. Measurement of both of these domains is essential to understanding patterns of care