Pharmacodynamic interactions between plant isolated compounds are important to understand the mode of action of an herbal extract to formulate or create better standardized extracts, phytomedicines, or phytopharmaceuticals. In this work, we propose binary mixtures using a leader compound to found pharmacodynamic interactions in inhibition of the NF-κB/AP-1 pathway using RAW-Blue™ cells. Eight compounds were isolated from Castilleja tenuiflora, four were new furofuran-type lignans for the species magnolin, eudesmin, sesamin, and kobusin. Magnolin (60.97%) was the most effective lignan inhibiting the NF-κB/AP-1 pathway, followed by eudesmin (56.82%), tenuifloroside (52.91%), sesamin (52.63%), and kobusin (45.45%). Verbascoside, a major compound contained in wild C. tenuiflora showed an inhibitory effect on NF-κB/AP-1. This polyphenol was chosen as a leader compound for binary mixtures. Verbacoside-aucubin and verbascoside-kobusin produced synergism, while verbascoside-tenuifloroside had subadditivity in all concentrations. Verbascoside-kobusin is a promising mixture to use on NF-κB/AP-1 related diseases and anti-inflammatory C. tenuiflora-based phytomedicines.

This study evaluated the effectiveness of Duddingtonia flagrans chlamydospores and an Artemisia cina hexane extract in reducing Haemonchus contortus fecal egg counts and larvae in periparturient ewes. This study involved five groups of four ewes: a control group, an ivermectin group, an A. cina oral extract group, a D. flagrans group, and a combined treatment group. Treatments began two weeks before delivery, with ivermectin administered 15 days before delivery. Fecal samples were collected every fifteen days to estimate parasite egg counts per gram of feces (EPG) and assess larvae reductions. The results showed very low EPG values for ivermectin and D. flagrans treatments (175 and 150, respectively). The control and combined treatment groups had EPG values rise to 3000 and 4100 by day 15. The EPG values for the A. cina group reached 850 and 533 in later samplings. Throughout the study, the D. flagrans and A. cina groups maintained low EPG values, with the highest recorded values being 50 and 0, respectively. All treatments significantly reduced the larvae in the fecal cultures: D. flagrans (97.4% reduction), ivermectin (91.4%), Artemisia cina (89.9%), and the combined treatment (84.3%).

Haemonchus contortus, a blood-feeding parasite in grazing sheep, causes economic losses. Drug resistance necessitates exploring plant-based anthelmintics like Artemisia cina (Asteraceae). The plant, particularly its ethyl acetate extract, shows anthelmintic activity against H. contortus. However, there is limited information on pharmacodynamic interactions in ethyl acetate compounds. The study aims to identify pharmacodynamic interactions in the ethyl acetate extract of A. cina with anthelmintic effects on H. contortus eggs and L₃ larvae using binary mixtures. Bioactive compounds were isolated via chromatography and identified using spectroscopic techniques. Pharmacodynamic interactions were assessed through binary mixtures with a main compound. Four bioactive compounds were identified: 1-nonacosanol, hentriacontane, peruvin, and cinic acid. Binary mixtures, with peruvin as the main compound, were performed. Peruvin/1-nonacosanol-hentriacontane and peruvin/cinic acid mixtures demonstrated 1.42-fold and 4.87-fold increased lethal effects in H. contortus L₃ infective larvae, respectively, at a 0.50LC₂₅/0.50LC₂₅ concentration. In this work, we determined the synergism between bioactive compounds isolated from the ethyl acetate extract of A. cina and identified unreported compounds for the specie.

Haemonchus contortus es un nematodo hematófago con alta tasa de reproducción, considerado como el principal problema en pequeños rumiantes en pastoreo. Por tanto, se buscan alternativas de tratamiento con base en el uso de los extractos vegetales. El objetivo de este estudio fue evaluar la actividad ovicida de Artemisia cina contra el parásito Haemonchus contortus y caracterizar químicamente el extracto con mayor actividad biológica a través de cromatografía de gases acoplado a espectrometría de masas (CG-MS). La obtención de los extractos a evaluar, se realizó con la técnica de maceración utilizando metanol, acetato de etilo y n-hexano. Los extractos se llevaron a sequedad total y se desafiaron frente a los huevos de H. contortus utilizando la técnica de inhibición de la eclosión de huevos descrita por la Asociación Mundial para el Avance de la Parasitología Veterinaria (WAAVP, por sus siglas en inglés). El extracto metanólico (EM) mostró el 100 % de actividad ovicida a una concentración de 4.25 mg/ml, siendo el más activo a una baja concentración, por tanto se caracterizó con CG-MS. EL EM posee principalmente ácidos grasos y terpenos; de ellos, el ácido hexadecanoico y el 2-[4-metil-6-(2,6,6-trimetilciclohex-1-enil) exa-1,3,5-trienil][ciclohex]-1-en-carboxialdehido. Los compuestos caracterizados han mostrado actividad antihelmíntica previamente reportada, por lo que la actividad ovicida puede estar asociada a estos. En conclusión, el extracto metanólico de A. cina tuvo una mayor actividad ovicida a bajas concentraciones, esto se debe probablemente a la presencia de ácidos grasos y terpenos.