ambrosia/phosphatase

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Myosin light chain phosphatase activity in ragweed pollen-sensitized canine tracheal smooth muscle.

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We have reported that myosin light chain phosphorylation is increased in contracting airway smooth muscle from hyperresponsive, ragweed pollen-sensitized dogs. This alteration is manifest physiologically in smooth muscle tissue from sensitized animals as it demonstrates faster shortening velocity

Phosphatases of ragweed pollen.

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Evaluation of the protective potential of Ambrosia maritima extract on acetaminophen-induced liver damage.

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The hepatoprotective activity of the aqueous-methanolic extract of Ambrosia maritima was investigated against acetaminophen (paracetamol, 4-hydroxy acetanilide) induced hepatic damage. Acetaminophen at the dose of 640 mg/kg produced liver damage in rats as manifested by the significant (P < 0.001)

Pollen grain column chromatography: quantitation and biochemical analysis of ragweed-pollen solutes.

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The kinetics, quantitative yield, and sequence of solute release during the extraction of allergenic substances from short ragweed (Ambrosia artemisiifolia) pollen were compared with a conventional batch-type method and the novel technique of pollen grain column chromatography. With the batch

Artemisinin blocks prostate cancer growth and cell cycle progression by disrupting Sp1 interactions with the cyclin-dependent kinase-4 (CDK4) promoter and inhibiting CDK4 gene expression.

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Artemisinin, a naturally occurring component of Artemisia annua, or sweet wormwood, is a potent anti-malaria compound that has recently been shown to have anti-proliferative effects on a number of human cancer cell types, although little is know about the molecular mechanisms of this response. We

Ragweed IgE and IgG4 antibody in nasal secretions during immunotherapy.

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We have developed sensitive amplified immunoassays for measurement of IgE and IgG4 ragweed (RW) antibodies in unconcentrated nasal washes. IgE to Amb a I (formerly antigen E) can be assayed to less than 0.1 ng/ml using IgE capture by anti-IgE on microtitre plates and an alkaline

Ragweed sensitization-induced increase of myosin light chain kinase content in canine airway smooth muscle.

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Previous studies have identified changes of mechanical properties of airway smooth muscle (ASM) from a canine model of atopic airway hyperreactivity. These changes, including increased maximum shortening capacity (delta Lmax) and early shortening velocity (Vo), may be responsible for the airway

Characterization of some of the enzymes in ragweed pollen.

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Ragweed pollen contains 11 esterase, 5 acid phosphatase, 2 alkaline phosphatose, 2 hexokinase, 2 glucose-6-phosphate dehydrogenase isozymes and one leucine amino peptidase band which can be separated by starch gel electrophoresis. The isozymes were distinguished from one another by their

Allergen carriage by atmospheric aerosol. II. Ragweed-pollen determinants in submicronic atmospheric fractions.

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Outdoor air was drawn by a vacuum system through a 0.8 micron molecular membrane filter and a back-up, refrigerated condensor from 8 A.M. to 5 P.M. daily during the 1982 ragweed-pollen season. Sample sets from each day were collected and stored separately. Condensate was collected in a freezing

Analysis of commercial pollen extracts by enzyme determination. I. Comparison of rast-inhibition assay and enzyme titration for orchard grass, rye grass and short ragweed pollen extracts.

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Allergenic potency assessed by the 50% RAST-inhibition endpoint titration was compared with enzyme titration for the analysis of commercial pollen extracts. Six different extracts of short ragweed, orchard grass and perennial rye grass were examined. A good correlation (p < 0.01) was found between

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