title: Anti-depressant-like effect of kaempferitrin isolated from Justicia spicigera Schltdl (Acanthaceae) in two behavior models in mice: evidence for the involvement of the serotonergic system.
abstract: We evaluated the antidepressant-like effect of kaempferitrin (Km) isolated from the plant Justicia spicigera (Asteraceae), which is used in traditional medicine for relieving emotional disorders, such as "la tristeza" (sadness or dysthymia) and "el humor" (mood changes). The actions of Km were evaluated in a forced swimming test (FST) and a suspension tail test (TST) in mice. We explored the involvement of the serotonergic system and the hypothalamic-hypophysis-adrenal axis (HPA) in the antidepressant-like effect of Km. To evaluate nonspecific effects of Km on general activity, the open field test (OFT) was performed. Km at 5, 10, and 20 mg/kg induced an antidepressant-like effect. Sub-effective dose of Km (1 mg/kg) produced a synergistic effect with imipramine (6.25 mg/kg) and fluoxetine (10 mg/kg) but not with desipramine (3.12 mg/kg). Pretreatment with p-chlorophenylalanine methyl ester (PCPA), a serotonin synthesis inhibitor, N-{2-(4-(2-methoxyphenyl)-1-piperazinyl}-N-(2-pyridinyl)cyclohexecarboxamide (WAY-100635), a selective 5-HT1A receptor antagonist, and 8OH-DPAT, a selective 5-HT1A agonist, but not pindolol (10 mg/kg) blocked the anti- immobility effect induced by Km. Taken together, these results indicate that the antidepressant-like effect of Km is related to the serotonergic system, principally 5-HT1A. This effect was not related to changes in locomotor activity.
authors.affiliation: Departamento de Sistemas Biológicos, Universidad Autónoma Metropolitana Unidad Xochimilco, Mexico D.F. 04960, Mexico. casnij@hotmail.com.
authors.forename: Julia
authors.initials: J
authors.lastname: Cassani
authors.affiliation: Laboratorio de Fitofarmacología, Dirección de Investigaciones en Neurociencias, Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz, Mexico D.F 14370, Mexico. danna196799@hotmail.com.
authors.forename: Ana María
authors.initials: AM
authors.lastname: Dorantes-Barrón
authors.affiliation: Departamento de Etología, Dirección de Investigaciones en Neurociencias, Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz, Mexico D.F, 14370, Mexico. mayagn@imp.edu.mx.
authors.forename: Lilian Mayagoitia
authors.initials: LM
authors.lastname: Novales
authors.affiliation: Subdirección de Investigaciones Clínicas del Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz, Calzada Mexico-Xochimilco 101, Col. San Lorenzo Huipulco, Delegación Tlalpan, Mexico D.F 14370, Mexico. real474@imp.edu.mx.
authors.forename: Guadalupe Alva
authors.initials: GA
authors.lastname: Real
authors.affiliation: Laboratorio de Fitofarmacología, Dirección de Investigaciones en Neurociencias, Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz, Mexico D.F 14370, Mexico. restrada@imp.edu.mx.
authors.forename: Rosa
authors.initials: R
authors.lastname: Estrada-Reyes
mesh_terms: D027901:Acanthaceae / Q000737:chemistry; D000818:Animals; D000928:Antidepressive Agents / Q000494:pharmacology*; D003345:Corticosterone / Q000097:blood; D004353:Drug Evaluation, Preclinical; D044949:Kaempferols / Q000494:pharmacology*; D008297:Male; D051379:Mice; D010936:Plant Extracts / Q000494:pharmacology*; D044282:Receptor, Serotonin, 5-HT1A / Q000378:metabolism; D059326:Serotonergic Neurons / Q000187:drug effects; D013550:Swimming
chemical_list: D000928:Antidepressive Agents; D044949:Kaempferols; D010936:Plant Extracts; D044282:Receptor, Serotonin, 5-HT1A; C042728:lespenefril; D003345:Corticosterone