RESUMO
An ethanol extract derived from the roots of Eleutherococcus senticosus was found to influence markedly the cytokine synthesis of activated whole blood cultures of ten healthy volunteers. Whereas the synthesis of Rantes was increased over a wide range of concentrations, the release of IL-4, IL-5 and IL-12 was significantly inhibited. An inhibition at higher concentrations, switching to a stimulation at lower doses of the extract was seen with G-CSF, IL-6 and IL-13. From these particular immuno-pharmacological effects of Eleutherococcus senticosus we suggest this herbal preparation possesses immuno-modulatory potency, rather than just being immuno-suppressive or -stimulating.
Assuntos
Fator Estimulador de Colônias de Granulócitos/biossíntese , Sistema Imunitário/efeitos dos fármacos , Interleucina-12/biossíntese , Interleucina-6/biossíntese , Extratos Vegetais , Plantas Medicinais , Adulto , Quimiocina CCL5/biossíntese , Quimiocina CCL5/sangue , Eleutherococcus , Feminino , Fator Estimulador de Colônias de Granulócitos/sangue , Humanos , Interleucina-12/sangue , Interleucina-6/sangue , Interleucinas/biossíntese , Interleucinas/sangue , Masculino , Pessoa de Meia-Idade , Extratos Vegetais/farmacologia , Raízes de PlantasRESUMO
Coupling a fluorochrome (e.g. fluorescein-isothiocyanate, FITC) to a molecule can enhance specific laser light absorption, thus leading to alteration or even destruction of the molecule itself. Therefore antibodies were labelled with FITC (absorption maximum 480 nm) and irradiated with laser light (488 nm) under various conditions. Inactivation of antibodies could only be achieved at the absorption maximum of FITC (as measured by direct and indirect immunofluorescence). Positive linear correlation exists between the amount of destruction and both exposure time and energy. Similar destructive effects were obtained when FITC-labelled peroxidase was irradiated. In these cases, enzyme activities measured by absorption photometry also showed a positive correlation to the total amount of energy transferred. Non-labelled proteins were not affected by irradiation. So we conclude that labelling of proteins with fluorochromes provides a highly specific means of selection of target molecules to be destroyed or inactivated. The method is based upon the laws of linear optics and is different from photodynamic or photochemical actions. The destructions observed are most likely caused by thermally induced changes of the molecules' tertiary structure.
