James A Kristie

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The peptide hormone ghrelin is the endogenous ligand for the type 1a growth hormone secretagogue receptor (GHS-R1a) and the only currently known circulating appetite stimulant. GHS-R1a antagonism has therefore been proposed as a potential approach for obesity treatment. More recently, ghrelin has been recognized to also play a role in controlling(More)
A new method to measure the activity of lipid-metabolizing enzymes is described. Subsequent to an enzymatic reaction, a two-phase system (organic/aqueous) is established by the addition of a phase partition scintillation fluid (PPSF). The PPSF serves as a scintillation fluid, a phase partition agent, and a carrier/separator of an organic-soluble(More)
Decreased neutrophil (PMN) chemotaxis is thought to contribute to the increased morbidity and mortality from infection in newborn infants. Pentoxifylline, a methylxanthine, has previously been shown to augment PMN chemotaxis in vitro. The authors therefore investigated the effects of pentoxifylline on 1) in vitro PMN chemotaxis, 2) in vivo leukocyte(More)
Escherichia coli lipopolysaccharide (LPS), a polyclonal B cell activator, has been employed to achieve in vitro stimulation of autoantibody-secreting B cells in young adult and aged mice of long-lived strains as assayed in a hemolytic plaque technique to syngeneic mouse erythrocytes. Aged 21- to 24-month-old C57BL/6J and (C57BL/10Sn x C3H/HeDiSn)F1 mice(More)
We present evidence that chronic 24 hour treatment of 3T3-L1 adipocytes with the phosphatase inhibitor okadaic acid increases deoxyglucose uptake 25 fold with a maximal effect at a concentration of 35nM. This pharmacological response is associated with a 21 fold increase in expression of glucose transporter 1 (glut 1) mRNA. These findings are discussed with(More)
We have used a mouse monoclonal antibody (31D8) to determine whether differences in neutrophil (PMN) subpopulations might help explain decreased PMN chemotaxis in neonates compared with that of adults. 31D8 has been shown to bind heterogeneously to adult PMNs. Approximately 80% of the PMNs that strongly bind 31D8 (31D8 "bright") are the same cells that(More)
Over the past decade, high throughput screening (HTS) has become the focal point for discovery programs within the pharmaceutical industry. The role of this discipline has been and remains the rapid and efficient identification of lead chemical matter within chemical libraries for therapeutics development. Recent advances in molecular and computational(More)
We previously demonstrated that pentoxifylline stimulated leukocyte migration in vitro and leukocyte accumulation in vivo and protects neonatal mice from experimentally induced Staphylococcus aureus infections. In the present studies we have investigated pentoxifylline's effect on human leukocyte function in vitro. In these studies we demonstrate that(More)
Some T cells produce membrane-associated or soluble molecules which bind nominal antigen specifically (TABM) and effect immunoregulation or events similar to cell-mediated hypersensitivity. We have used polyclonal antisera raised against an azobenzene arsonate (ABA)-specific TABM secreted by an ABA-specific T cell hybrid or against TNP-specific polypeptides(More)