Articles: PubMed: Immunomodulation mediated by a herbal syrup containing a standardized Echinacea root extract: A pilot study in healthy human subjects on cytokine gene expression. PubMed: Analysis of alkylamides in Echinacea plant materials and dietary supplements by ultrafast liquid chromatography with diode array and mass spectrometric detection. PubMed: P-Glycoprotein inhibitory activity of lipophilic constituents of Echinacea pallida roots in a human proximal tubular cell line. PubMed: Xanthatin and xanthinosin from the burs of Xanthium strumarium L. as potential anticancer agents. PubMed: Echinacea alkylamides modulate induced immune responses in T-cells. PubMed: Comparison of Echinacea alkylamide pharmacokinetics between liquid and tablet preparations. PubMed: Proliferative activity of Echinacea angustifolia root extracts on cancer cells: Interference with doxorubicin cytotoxicity. PubMed: Cytotoxic effects of Echinacea root hexanic extracts on human cancer cell lines. PubMed: Synergistic antioxidative effects of alkamides, caffeic acid derivatives, and polysaccharide fractions from Echinacea purpurea on in vitro oxidation of human low-density lipoproteins. PubMed: An evaluation of Echinacea angustifolia in experimental rhinovirus infections. PubMed: In vitro and in vivo immune stimulating effects of a new standardized Echinacea angustifolia root extract (Polinacea). PubMed: Changes in immunomodulatory properties of Echinacea spp. root infusions and tinctures stored at 4 degrees C for four days. PubMed: Rapid and non-destructive determination of the echinacoside content in Echinacea roots by ATR-IR and NIR spectroscopy. PubMed: Anti-inflammatory and cicatrizing activity of Echinacea pallida Nutt. root extract. PubMed: [Pharmaceutical comparability of different therapeutic Echinacea preperations]. PubMed: Volatile components of roots, stems, leaves, and flowers of Echinacea species. PubMed: Increased production of antigen-specific immunoglobulins G and M following in vivo treatment with the medicinal plants Echinacea angustifolia and Hydrastis canadensis. PubMed: Echinacea root extracts for the prevention of upper respiratory tract infections: a double-blind, placebo-controlled randomized trial. PubMed: Immunomodulating activity of Echinacea gloriosa L., Echinacea angustifolia DC. and Rudbeckia speciosa Wenderoth ethanol-water extracts. PubMed: Naturally occurring insect growth regulators. II. Screening of insect and plant extracts as insect juvenile hormone mimics.