ALOE VERA LIFE BARRIERS - CAPE VERDE

Projecto DESIRE - Cabo Verde

The genus Aloe L. (Xanthorrhoeaceae) in Djibouti

The Horn of Africa is rich in succulent plants, yet the flora in some parts of the region remains under-explored, owing largely to political instability and inaccessibility. The Republic of Djibouti is a relatively small, politically stable country where botanical studies continue to identify new species records and new taxa. Here, we focus on the genus Aloe L. (Xanthorrhoeaceae subfamily Asphodeloideae) in Djibouti. Recent field surveys resulted in five new species records for the country (A. rigens Reynolds & Bally, A. macrocarpa Tod., A. eumassawana Carter, Gilbert & Sebsebe, A. ericahenriettae McCoy and A. djiboutiensis McCoy), in addition to the three taxa included in treatment for the Flora of Djibouti (Aloe trichosantha A.Berger, A. aff. trichosantha and A. mcloughlinii Christian). We present notes on the determination distribution and habitats of the nine Aloe species recorded in Djibouti.

Lipoma arborescens: diagnóstico e imagem

O lipoma arborescens é uma lesão intra-articular de origem desconhecida, caracterizada por proliferação vilolipomatosa crônica da membrana sinovial. Pode estar associado a doenças degenerativas, diabetes mellitus, artrite reumatóide juvenil e artrite reumatóide do adulto. O diagnóstico baseia-se em achados de ressonância magnética e de biópsia sinovial. Relatamos o caso de uma paciente do sexo feminino, de oito anos de idade, com lipoma arborescens e história de artrite em joelhos e cotovelos há dois anos, tendo sido observada melhora parcial da artrite após o início do tratamento medicamentoso convencional.

Derivados citotóxicos de vitanolidos isolados das folhas de Acnistus arborescens

In view of anticancer activity of 7 β-acetoxywithanolide D (2) and 7β-16α-diacetoxywithonide D (3), isolated from the leaves of Acnistus arborescens (Solanaceae), five withanolide derivatives were obtained and their structures were determined by NMR, MS and IV data analysis. The in vitro anticancer activity of these derivatives was evaluated in a panel of cancer cell lines: human breast (BC-1), human lung (Lu1), human colon (Col2) and human oral epidermoid carcinoma (KB). Compounds 2a (acetylation of 2), 3b (oxidation of 3) and 2c (hydrogenation of 2) exhibited the highest anticancer activity against human lung cancer cells, with ED50 values of 0.19, 0.25 and 0.63 μg/mL, respectively.

Chemical and physical properties of aloe vera (Aloe barbadensis Miller) gel stored after high hydrostatic pressure processing

The aim of this study was to evaluate the influence of high hydrostatic pressure (150, 250, 350, 450, and 550 MPa), applied for 5 minutes, on antioxidant capacity, total phenolic content, color, firmness, rehydration ratio, and water holding capacity of aloe vera gel stored for 60 days at 4 °C. The analyzed properties of the pressurized gel showed significant changes after the storage period. The highest value of total phenolic content was found at 550 MPa. However, a decrease in the antioxidant capacity was observed for all pressurized gel samples when compared to the control sample (p < 0.05). The smallest changes in product color were observed at pressure levels between 150 and 250 MP. The application of high hydrostatic pressure resulted in lower gel firmness, and the lowest value was found at 150 MPa (p < 0.05). On the other hand, the untreated sample showed a greater decrease in firmness, indicating that high pressure processing preserves this property. The application of high hydrostatic pressure exhibited modifications in the food matrix, which were evaluated in terms of rehydration ratio and water holding capacity.

Aloe vera extract as a promising treatment for the quality maintenance of minimally-processed table grapes

The effect of an edible film obtained from a commercial Aloe vera extract, on the quality maintenance of minimally processed grapes belonging to three different cultivars (Sugar One, Victoria and Black Magic) was evaluated by enzymatic (PPO, PME, β-GAL), physicochemical (pH, acidity, °Brix), and sensorial methods. All the analyzed parameters were measured in extracts obtained from minimally processed grapes packaged in ordinary atmosphere and stored at 4 °C for 15 days. Samples dipped into Aloe vera showed significant differences (p≤0.05) compared to untreated ones. The determination of such parameters and the evaluation of consumer acceptability were helpful to determine the effectiveness of the post-harvest treatment with Aloe vera for a storage period of 15 days.

Citotoxicidad del aloe vera y el formocresol en células mesenquimales de pulpa dental.

Tesis (Maestría en Ciencias Odontológicas en el área de Odontopediatría) UANL, 2014.

Plan Integral para la Comercialización de Aloe Vera en Colombia

En los últimos años, los gremios del sector agrícola en Colombia han venido haciendo grandes esfuerzos con el fin de obtener certificaciones a nivel internacional sobre los cultivos y productos derivados del Aloe Vera, que permitan cumplir con los estándares de calidad que exige el mercado industrial y también el consumidor final; pues él entiende, cada vez mejor, las bondades que este producto ofrece para su bienestar. Esto ha hecho que el extracto de Aloe Vera se presente actualmente como un mercado potencial que genera altas expectativas en cuanto al crecimiento de demanda local, y en consecuencia, motiva a llevar a cabo este proyecto de investigación con la intención de ofrecer al mercado local una alternativa para la sustitución de importaciones de extractos del Aloe Vera. La agricultura siempre será una de las locomotoras para el desarrollo de la economía de un país, en muchos casos las materias primas agrícolas se importan, cuando lo que se debe hacer es aprovechar el ecosistema que tiene el país acompañándolo con herramientas técnicas, capacitación al agricultor, programas de financiamiento, entre otras; para así lograr una integración en la cadena de abastecimiento y generar valor a los procesos para que el producto sea competitivo en el mercado local e internacional.

Effect of Aloe vera extract on the improvement of the respiratory activity of leukocytes of matrinxã during the transport stress

This study evaluated the effect of extract of Aloe vera in the transport water of matrinxã (Brycon amazonicus) fish on stress response and leukocyte respiratory activity. Fish was transported for 4 h in water containing Aloe at levels 0; 0.02; 0.2 and 2 mg/L, and sampled before transport 2, 4, 24 and 96 h after for determination of plasma glucose and respiratory activity of leukocytes. An additional in vitro assay was conducted with another fish species, pacu (Piaractus mesopotamicus), to test the respiratory burst of leukocytes exposed to Aloe extract (0.0, phosphate-buffered saline (PBS) only) at 0.1, 0.2, 0.5 and 1 mg/L). Plasma glucose increased after 2 and 4 h of transport and returned to control levels within 24 h, but the addition of Aloe in the transport water did not affect the level of blood glucose. However, at 2 h of transport, Aloe enhanced the respiratory activity of leukocytes in a dose-dependent way. The highest value of respiratory burst activity of leukocytes was observed in the fish transported in water containing Aloe at 2 mg/L. The enhancing effect of the plant extract on the production of oxygen radicals was confirmed in vitro in leukocytes of pacu incubated in Aloe at concentrations 0.1 and 0.2 mg/L. The results suggest that Aloe vera is a modulator of the immune system in fish improving the innate immune response tested.

Enraizamento in vitro e aclimatização de mudas micropropagadas de Aloe vera L.

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Micropropagação de babosa (Aloe vera L.)

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Espermidina e espermina exogena na micropropagação de Aloe vera (L.) Burm

The lateral shoots of the Aloe vera L. Burm have been inoculated in culture medium. The work has been divided in two phases. In the phase I different concentrations of NAA and BAP were added to the MS . In the phase II, plants proceeding of the MS were inoculated in medium containing or not spermidine and/or spermine. In the phase I the best results for mass production and shooting came out with the use of MS + 8,88 m mol L -1 BAP + 5,36 m mol L -1 NAA and these treatments didn't induce the rooting. Plants submitted to treatments with polyamines presented emission of roots during the phase II, suggesting possible inductor effect when used by isolated means during the rooting. No traces of oxidation were noted in the culture medium containing the polyamines. The use of spermidine in the culture-medium promoted a greater mass increasing and the most number of shoots was obtained with the use of the combination of polyamines. © 2008 1999, Editorial Ciencias Médicas.

Efeito de poliaminas exógenas no crescimento inical in vitro e nos teores de fenóis, poliaminas e atividade da peroxidase em Aloe vera (L.) Burm.

Lateral shoots of the Aloe vera (L.) Burm. cultivated in vitro, without addition vegetal regulators, for 90 days, were inoculated in MS culture-medium, containing or not spermine and/or spermidine. After 30 days of cultivation, the plants were submitted to biochemical analysis together with micropropagated plants - that were under in vitro cultivation for 90 days - (denominated as characterization), and matrix plants (in vivo). The levels of free polyamines, total phenols, total flavonoids, and the activity of peroxidase were evaluated in the biochemical analyses. The exogenous application of spermidine have promoted large number of shoots. Spermidine and spermine have promoted, when associated, an increase in the number of shoots as well as an increase of the contents of putrescine and and flavonoids. The putrescine has presented the most significant alterations, enabling to be utilized as marker of morphogenesis in the micropropagated Aloe vera. Tissues under active growth have presented high activity of peroxidase as well as those with greater rate of oxidation. In these tissues, there were noticed also higher contents of total flavonoids, indicating the need of antioxidative compounds. The action of polyamines jointly tseemed to be benefic for the shooting of micropropagated Aloe vera.

Uso da Aloe vera L. no manejo de matrinxã (Brycon amazonicus)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Análise da reação tecidual às inclusões subcutâneas de matriz de colágeno liofilizada no dorso de ratos Wistar tratados com Aloe vera

Pós-graduação em Cirurgia Veterinária - FCAV