peoniflorin and Edema

LPS has been widely used to induce inflammatory pain, attributing to production of inflammatory cytokines and sensitization of nociceptors. Paeoniflorin (PF) possesses anti-nociceptive property, but its effect on LPS-induced inflammatory pain has not been investigated. In this study, we aimed to investigate the analgesic effect of PF on an inflammatory pain mouse model and explore the underlying mechanisms. LPS-induced inflammatory pain model was established in C57BL/6J mice after PF treatment. Then, thermal hyperalgesia, neutrophil infiltration, inflammatory cytokine production, intracellular Ca

Topics: Animals; Calcium; Cytokines; Edema; Glucosides; Inflammasomes; Inflammation; Inflammation Mediators; Lipopolysaccharides; Macrophages; Male; Mice, Inbred C57BL; Models, Biological; Monoterpenes; Neutrophils; NF-kappa B; NLR Family, Pyrin Domain-Containing 3 Protein; Nociception; Pain; Protein Kinase C; Transcription, Genetic; TRPV Cation Channels

Topics: 1-Naphthylisothiocyanate; Animals; Bile; Biomarkers; Carrier Proteins; Cholestasis; Edema; Glucosides; Inflammation; Liver; Liver Function Tests; Male; Monoterpenes; Necrosis; Neutrophil Infiltration; NF-kappa B; Rats; Rats, Sprague-Dawley

An investigation was designed and conducted to detect pharmacokinetic differences between paeoniflorin (Pae) microemulsion and Pae saline. Pae microemulsion (25, 50,100 mg x kg(-1)) was administered to three groups of rats with adjuvant arthritis (AA) while Pae (25, 50,100 mg x kg(-1)) was given to another three groups of rats both for ten days. A HPLC assay was developed to determine the plasma concentrations of Pae. The plasma concentrations of Pae groups (25, 50 mg x kg(-1)) were undetectable. Furthermore, compared with pharmacokinetic parameters of Pae group (100 mg x kg(-1)), maximum concentration (C(max)), the area under the plasma concentration-time curve (AUC(0-t)), and mean retention time MRT(0-infinity))(h) of Pae microemulsion (100 mg x kg(-1)) increased apparently, while volume of distribution (Vd) and clearance rate (CL/F) decreased. These results indicate that a microemulsion significantly improves the absorption of Pae in AA rats.

Topics: Animals; Anti-Inflammatory Agents, Non-Steroidal; Area Under Curve; Arthritis, Experimental; Benzoates; Biological Availability; Bridged-Ring Compounds; Calibration; Chromatography, High Pressure Liquid; Edema; Emulsions; Foot; Freund's Adjuvant; Glucosides; Half-Life; Indicators and Reagents; Male; Monoterpenes; Paeonia; Plant Roots; Rats; Rats, Sprague-Dawley

The pharmacological properties of the five samples of glycyrrhizic acid, paeoniflorin, the extracts of Glycyrrhizae Radix, the extracts of Paeoniae Radix and a preparation of Chinese drug Shakuyakukanzo-To were compared by investigating their actions in the carrageenan-induced paw edema, the cotton pellet granuloma formation and acetic acid-induced writhing syndrome tests, using ddY-strain mice. The concentrations of glycyrrhizic acid and paeniflorin, the main components of Glycyrrhizae Radix and Paeoniae Radix respectively, were determined in the preparations by high performance liquid chromatography. Anti-inflammatory activity was observed with the doses of glycyrrhizic acid, 3.0 and 30.0 mg/kg p.o., which are almost equivalent to the quantities contained in the extracts of Glycyrrhizae Radix, 18.0 (normal human dose per day) and 180.0 mg/kg, or in Shakuyakukanzo-To, 32.0 (normal human dose per day) and 320.0 mg/kg, respectively and with the doses of the extracts of Glycyrrhizae Radix, 18.0 and 180.0 mg/kg p.o., but not with the doses of Shakuyakukanzo-To, 32.0 and 320.0 mg/kg p.o., in carrageenan-induced edema and cotton pellet method. Doses of paeoniflorin (2.0, 20.0 and 200.0 mg/kg p.o.) and the extracts of Paeoniae Radix, 21.0 (normal human dose per day) and 210.0 mg/kg p.o., which contain almost equivalent quantities of paeoniflorin, 2.0 and 20.0 mg/kg, respectively, showed significant inhibitory effects in the writhing syndrome test. Furthermore, Shakuyakukanzo-To, 32.0 and 320.0 mg/kg p.o., which contain almost equivalent quantities of paeoniflorin, 2.0 and 20.0 mg/kg, showed strong effects in this test.(ABSTRACT TRUNCATED AT 250 WORDS)

Topics: Acetates; Acetic Acid; Animals; Anti-Inflammatory Agents; Benzoates; Bridged-Ring Compounds; Carrageenan; Chromatography, High Pressure Liquid; Drug Combinations; Drugs, Chinese Herbal; Edema; Glucosides; Glycyrrhetinic Acid; Glycyrrhiza; Glycyrrhizic Acid; Granuloma; Male; Mice; Monoterpenes; Paeonia; Pain; Plant Extracts; Plants, Medicinal