RESUMO
Poultry is commonly infected by different bacteria and parasites in the environment, resulting in increased morbidity and mortality, but immunostimulants have been enhancing non-specific defense mechanisms conferring laying hens' protection. For this purpose, the pulp of yellow (Pouteria campechiana), white (Casimiroa edulis), and black (Diospyros digyna) sapotes were nanoencapsulated (YWB-SN) and evaluated in laying hens' peripheral blood leukocytes to test their addition to the experimental diets at a concentration of 0.5% (5g/kg of dry food) for 1 month (with two samples at days 15 and 30). The YWB-SN were safe when exposed to peripheral blood leukocytes (PBLs). The in vitro experiment showed that these nanocapsules enhanced reactive oxygen species production, and B-SN stimulated phagocytosis activity. Concerning the proinflammatory cytokine (TNF-α) transcription, this gene was upregulated after W-SN stimulation, while B-SN upregulated the IgG gene expression significantly. IgM was upregulated with any YBW-SN in PBLs after 24 h of stimulation. The in vivo study showed a notable B-SN immunostimulation in serum and an upregulation of TNF-α, IgM, and IgG mRNA transcription. Therefore, this study provides a new result of the yellow, white, and black sapote nanocapsules as a functional food for the poultry industry, highlighting the black sapote Diospyros digyna immunostimulant effect.
Assuntos
Casimiroa , Diospyros , Manilkara , Nanocápsulas , Pouteria , Animais , Feminino , Galinhas/fisiologia , Adjuvantes Imunológicos/farmacologia , Fator de Necrose Tumoral alfa , Dieta/veterinária , Aves Domésticas , Suplementos Nutricionais , Imunoglobulina G , Imunoglobulina M , Ração Animal/análiseRESUMO
Casimiroa edulis La Llave is known to contain unusual 5,6-dimethoxyflavones bearing a variously oxygenated B-ring. Phytochemical investigation of the leaves and the roots of C. edulis achieved the isolation of two new methoxylated flavones, named casedulones A (1) and B (2), together with 12 known analogues. Their unique structures were established with the aid of spectral analyses and total syntheses. Pre-treatment with 20 µM of 1 and 2 suppressed MMP-9 expression in LPS-mediated THP-1 cells, indicating that the characteristic flavonoids in C. edulis could be potential anti-angiogenics for cancer prevention.
Assuntos
Casimiroa , Flavonas , Casimiroa/química , Flavonas/química , Metaloproteinase 9 da Matriz , Extratos Vegetais/química , Folhas de Planta/química , Flavonoides/farmacologia , Flavonoides/análiseRESUMO
The hydroalcoholic extract obtained from the seeds of Casimiroa edulis cultivated in Sardinia (Italy) have been assayed on the two enzymatic-associated activities of the HIV-1 reverse transcriptase (RT), the RNA-dependent DNA polymerase (RDDP) and the ribonuclease H. In biochemical assays, the extract inhibited both activities in a dose-dependent manner, showing a 10-fold more potent inhibition of the HIV-1 RT RDDP activity. Furthermore, the extract was cytotoxic on K562 cell replication.
Assuntos
Casimiroa/química , Transcriptase Reversa do HIV/metabolismo , Extratos Vegetais/química , Extratos Vegetais/farmacologia , Inibidores da Transcriptase Reversa/química , Inibidores da Transcriptase Reversa/farmacologia , Sementes/química , Linhagem Celular Tumoral , Ativação Enzimática/efeitos dos fármacos , Humanos , DNA Polimerase Dirigida por RNA/metabolismo , Ribonuclease H/metabolismoRESUMO
The leaf essential oil of Casimiroa edulis (Rutaceae), collected from Monteverde, Costa Rica, has been obtained by hydrodistillation and analyzed by GC-MS. The leaf oil was dominated by sesquiterpene hydrocarbons, predominately germacrene D (16-22%) and (E)-caryophyllene (16-17%), consistent with the traditional use of this plant as a sedative, sleep inducer and hypotensive.
Assuntos
Casimiroa/química , Óleos Voláteis/análise , Folhas de Planta/química , Costa Rica , Cromatografia Gasosa-Espectrometria de Massas , Óleos Voláteis/isolamento & purificação , Sesquiterpenos/isolamento & purificaçãoRESUMO
An efficient method has been developed to synthesize casimiroin (1), a component of the edible fruit of Casimiroa edulis, on a multigram scale in good overall yield. The route was versatile enough to provide an array of compound 1 analogues that were evaluated as QR2 and aromatase inhibitors. In addition, X-ray crystallography studies of QR2 in complex with compound 1 and one of its more potent analogues has provided insight into the mechanism of action of this new series of QR2 inhibitors. The initial biological investigations suggest that compound 1 and its analogues merit further investigation as potential chemopreventive or chemotherapeutic agents.
Assuntos
Inibidores da Aromatase/síntese química , Benzodioxóis/síntese química , Casimiroa/química , Quinolonas/síntese química , Quinona Redutases/antagonistas & inibidores , Animais , Antineoplásicos/síntese química , Antineoplásicos/química , Antineoplásicos/farmacologia , Aromatase/química , Inibidores da Aromatase/química , Inibidores da Aromatase/farmacologia , Benzodioxóis/química , Benzodioxóis/farmacologia , Linhagem Celular Tumoral , Cristalografia por Raios X , Ensaios de Seleção de Medicamentos Antitumorais , Frutas/química , Humanos , Camundongos , Modelos Moleculares , Quinolonas/química , Quinolonas/farmacologia , Relação Estrutura-AtividadeRESUMO
The Casimiroa pringlei essential oil was analyzed to determine its chemical composition. Its effect on rat uterine smooth muscle was studied and compared with verapamil. Pure commercial piperitone, eucalyptol, and alpha-terpineol, the major constituents of C. pringlei essential oil, were tested on the uterine tonic contraction induced by high-potassium depolarizing solution (KCl 60 mM).
Assuntos
Casimiroa , Óleos Voláteis/farmacologia , Parassimpatolíticos/farmacologia , Contração Uterina/efeitos dos fármacos , Útero/efeitos dos fármacos , Análise de Variância , Animais , Bloqueadores dos Canais de Cálcio/farmacologia , Casimiroa/química , Cromatografia Gasosa , Feminino , Espectrometria de Massas , Óleos Voláteis/química , Óleos Voláteis/isolamento & purificação , Parassimpatolíticos/química , Parassimpatolíticos/isolamento & purificação , Extratos Vegetais , Óleos de Plantas/química , Óleos de Plantas/isolamento & purificação , Óleos de Plantas/farmacologia , Cloreto de Potássio/farmacologia , Ratos , Verapamil/farmacologiaRESUMO
An efficient method has been developed to synthesize zapotin (5,6,2',6'-tetramethoxyflavone), a component of the edible fruit Casimiroa edulis, on a multigram scale. The synthesis utilizes a regioselective C-acylation of a dilithium dianion derived from a substituted o-hydroxyactophenone to afford a beta-diketone intermediate that can be cyclized to zapotin in good overall yield, thus avoiding the inefficient Baker-Venkataraman rearrangement pathway. Zapotin was found to induce both cell differentiation and apoptosis with cultured human promyelocytic leukemia cells (HL-60 cells). In addition, the compound inhibits 12-O-tetradecanoylphorbol 13-acetate (TPA)-induced ornithine decarboxylase (ODC) activity with human bladder carcinoma cells (T24 cells), and TPA-induced nuclear factor-kappa B (NF-kappaB) activity with human hepatocellular liver carcinoma cells (HepG2 cells). These data suggest that zapotin merits further investigation as a potential cancer chemopreventive agent.