Antiulcerogenic potential activity of free and nanoencapsulated Passiflora serratodigitata L. extracts.

This paper provides evidence that the leaves and stem of Passiflora serratodigitata L. dry crude extract (DCE), ethylacetate fraction (EAF), and residual water fraction show potential antiulcerogenic activity. Interestingly, the polymeric nanocapsule loaded with EAF had 10-fold more activity than the free EAF. Furthermore, the polymer nanoparticles provided homogeneous colloidal drug delivery systems and allowed overcoming challenges such as poor aqueous solubility as well as the physical-chemical instability of the organic extract, which presented 90% (w/w) of the flavonoid content. The entrapment efficiency of the total flavonoid was 90.6 ± 2.5% (w/v) for the DCE and 79.9 ± 2.7% (w/v) for the EAF. This study shows that nanoencapsulation improves both the physicochemical properties and the efficacy of the herbal formulations. Therefore, free and encapsulated extracts have the potential to be suitable drug design candidates for the therapeutic management of ulcer.

Applying design of experiments (DOE) to flavonoid extraction from Passiflora alata and P. edulis

The Passifloraceae family is extensively used in native Brazilian folk medicine to treat a wide variety of diseases. The problem of flavonoid extraction from Passiflora was treated by application of design of experiments (DOE), as an experiment with mixture including one categorical process variable. The components of the binary mixture were: ethanol (component A) and water (component B); the categorical process variable: extraction method (factor C) was varied at two levels: (+1) maceration and (-1) percolation. ANOVA suggested a cubic model for P. edulis extraction and a quadratic model for P. alata.These results indicate that the proportion of components A and B in the mixture is the main factor involved in significantly increasing flavonoid extraction. In regard to the extraction methods, no important differences were observed, which indicates that these two traditional extraction methods could be effectively used to extract flavonoids from both medicinal plants. The evaluation of antioxidant activity of the extract by ORAC method showed that P. edulis displays twice as much antioxidant activity as P. alata. Considering that maceration is a simple, rapid and environmentally friendly extraction method, in this study, the optimized conditions for flavonoid extraction from these Passiflora species is maceration with 75% ethanol for P. edulis and 50% ethanol for P. alata.

Passiflora alata Curtis: a Brazilian medicinal plant: [review] / Passiflora alata Curtis: una planta medicinal brasileña: [revisión]

This review describes botanical, chemical, pharmacological and phytotechnological properties of Passiflora alata Curtis, with emphasis on analytical methods. Native to Brazil, P. alata is featured in several pharmaceutical preparations registered by the regulatory agency ANVISA. In four of the five editions of the Brazilian Pharmacopoeia, P. alata leaves have been included under the designation of “maracujᔠor “maracujá doce” (sweet passion fruit). This species is cited as Passiflora alata Curtis and was originally published in 1788 in the Botanical Magazine. In the last decade, phytochemical and pharmacological studies of Brazilian researchers related to this plant have increased. Despite several studies, the substances responsible for the anxiolytic, sedative, antioxidative and antiulcer activities attributed to passifloras remain unknown. Analytical methods for the quantification of markers are being developed in order to improve quality control analysis and to better understand the relationship between chemical markers and their pharmacological effects. Those methods include spectrophotometry, high performance thin-layer chromatography (HPTLC) and high performance liquid chromatography (HPLC). There is also great interest in the technological processes involved in the production of dry extracts of this native medicinal plant with the primary goal of assuring the quality of phytopharmaceutical products.

En esta revisión se describen las características botánicas, químicas, farmacológicas y fitotecnologicas de Passiflora alata Curtis, con énfasis en los métodos analíticos. Originaria de Brasil, varias preparaciones farmacéuticas de P. alata son registradas por el organismo regulador ANVISA. En tres de las cinco ediciones de la Farmacopea Brasileña, las hojas de P. alata se han incluido bajo la denominación de "maracuyá" (fruta de la pasión). Esta especie debe ser citada como Passiflora alata Curtis, publicada originalmente en 1788 en “Botanical Magazine”. En la última década, los estudios fitoquímicos y farmacológicos de investigadores brasileños relacionados con esta planta han aumentado substancialmente. A pesar de varios estudios, las sustancias responsables de las actividades ansiolítica, sedante, antioxidante y antiulcerosa atribuidas a la passiflora continúan siendo desconocidos. Los métodos analíticos para la cuantificación de los marcadores están siendo desarrollados con el fin de mejorar el análisis de control de calidad y para comprender mejor la relación entre marcadores químicos y sus efectos farmacológicos. Estos métodos incluyen espectrometría de alto rendimiento, cromatografía en capa fina (HPTLC) y la cromatografía líquida de alta resolución (HPLC). También existe un gran interés en los procesos tecnológicos envueltos en la producción de extractos secos con el objetivo principal de asegurar la calidad de los productos fitosanitarios.

Optimization of Pothomorphe umbellata (L.) Miquel topical formulations using experimental design.

Pothomorphe umbellata is a native plant widely employed in the Brazilian popular medicine. This plant has been shown to exert a potent antioxidant activity on the skin and to delay the onset and reduce the incidence of UVB-induced skin damage and photoaging. The aim of this work was to optimize the appearance, the centrifuge stability and the permeation of emulsions containing P. umbellata (0.1% 4-nerolidylchatecol). Experimental design was used to study ternary mixtures models with constraints and graphical representation by phase diagrams. The constraints reduce the possible experimental domain, and for this reason, this methodology offers the maximum information while requiring the minimum investment. The results showed that the appearance follows a linear model, and that the aqueous phase was the principal factor affecting the appearance; the centrifuge stability parameter followed a mathematic quadratic model and the interactions between factors produced the most stable emulsions; skin permeation was improved by the oil phase, following a linear model generated by data analysis. We propose as optimized P. umbellata formulation: 68.4% aqueous phase, 26.6% oil phase and 5.0% of self-emulsifying phase. This formulation displayed an acceptable compromise between factors and responses investigated.

Avaliação por análise fatorial das condições da extração do 4-nerolidilcatecol de Pothomorphe umbellata (L). Miq / Evaluation of extraction conditions of 4-nerolidylchatecol from Pothomorphe umbellata (L). Miq. using factorial design

Foi avaliada a influência dos fatores (1) tempo: 10 e 40 minutos; (2) tamanho de partícula: 840 e 420 mm; (3) hidromódulo: 1:50 e 1:100 e (4) temperatura: 40 e 60 °C na extração do 4-nerolidilcatecol, (4-NC) mediante planejamento fatorial ®2 POT. 4¼ em que quatro variáveis foram estudadas em dois níveis (máximo e mínimo). O método de extração foi maceração e a quantificação do 4-nerolidilcatecol foi realizada por cromatografia líquida de alta eficiência (CLAE) com detetor eletroquímico. Os resultados da análise fatorial indicam que o fator principal que favorece a extração do princípio ativo é o tamanho de partícula [efeito (2): 12,2086]...