RESUMO
In this work, the electrochemical behavior of the glycosylated flavonoid kaempferitrin was studied, and an electroanalytical methodology was developed for its determination in infusions of Bauhinia forficata using a boron-doped diamond electrode (BDD). The electrochemical behavior of the flavonoid was studied by cyclic voltammetry, and two irreversible oxidation peaks at 0.80 and 1.0 V vs Ag/AgCl were observed. The influence of the pH on the voltammograms was examined, and higher sensitivity was found at pH 7.0. The electrochemical process corresponding to peak 1 at 0.80 V is predominantly diffusion-controlled, as the study shows at varying scan rates. An analytical plot was obtained by square wave voltammetry at optimized experimental conditions (frequency = 100 s-1, amplitude = 90 mV, and step potential = 8 mV) in the concentration range from 3.4 µmol L-1 to 58 µmol L-1, with a linearity of 0.99. The limit of detection and limit of quantification values were 1.0 µmol L-1 and 3.4 µmol L-1, respectively. Three samples of Bauhinia forficata infusions (2 g of sample in 100 mL of water) were analyzed, and the KF values found were 5.0 × 10-4 mol L-1, 3.0 × 10-4 mol L-1, and 7.0 × 10-4 mol L-1, with recovery percentages of 98 %, 106 % and 94 %, respectively. Finally, experiments were performed with two other flavonoids (chrysin and apeginin) to compare and propose an electrochemical oxidation mechanism for kaempferitrin, which was supported by quantum chemical calculations.
Assuntos
Técnicas Eletroquímicas , Quempferóis , Oxirredução , Quempferóis/química , Quempferóis/análise , Técnicas Eletroquímicas/métodos , Glicosilação , Eletrodos , Bauhinia/química , Teoria Quântica , Flavonoides/química , Flavonoides/análise , Limite de Detecção , Diamante/químicaRESUMO
ETHNOPHARMACOLOGICAL RELEVANCE: Bauhinia forficata Link, is a Brazilian native plant and popularly known as pata-de-vaca ("paw-of-cow"). The tea prepared with their leaves has been extensively used in the Brazilian traditional practices for the diabetes treatment. The aim of the present study was to investigate the effect of capsules containing granules of a standardized extract of B. forficata leaves as adjuvant treatment on the glycemic control of patients with type-2 diabetes melitus. MATERIALS AND METHODS: A double-blind, randomized clinical trial using capsules containing granules prepared by wet granulation of a standardized extract from B. forficata leaves as adjuvant treatment, was conducted. 92 patients aged 18-75 years from an outpatient clinic with type-2 diabetes were randomly assigned by a simple randomization scheme, in a 1:1 ratio to receive capsules of B. forficata or placebo for four months. The capsules used contain 300 mg of standardized extract from B. forficata leaves, yielding 2% of total flavonoid content per capsule. Primary outcome was glycated hemoglobin levels and fasting plasma glucose at 4 months. Possible harms were also determined. RESULTS: The findings showed that at 4 months, the mean fasting plasma glucose levels and glycated hemoglobin were both significantly lower in the B. forficata group than in the placebo group. CONCLUSION: The present study suggests that the adjunctive use of capsules containing standardized extract of B. forficata can add to regular oral anti-diabetics in the metabolic and inflammatory control of type-2 diabetes patients.
Assuntos
Bauhinia/química , Diabetes Mellitus Tipo 2/tratamento farmacológico , Fitoterapia , Extratos Vegetais/uso terapêutico , Folhas de Planta/química , Administração Oral , Adolescente , Adulto , Idoso , Glicemia/efeitos dos fármacos , Brasil , Método Duplo-Cego , Feminino , Humanos , Hipoglicemiantes/química , Hipoglicemiantes/uso terapêutico , Masculino , Pessoa de Meia-Idade , Extratos Vegetais/química , Adulto JovemRESUMO
Microdilution assays were performed in order to evaluate the antimicrobial activity of the ethanoic extract from the leaves of Bauhinia forficate (EEBF) against different microorganisms. The extract did not present inner antimicrobial activities against the tested strains. However, EEBF was able to modulate the norfloxacin-resistance against Staphylococcus aureus SA1199-B that overproduce the NorA efflux pump, once sub-inhibitory concentrations of EEBF reduced the minimal inhibitory concentratio of the norfloxacin in 87.5%. This modulatory effect was also found when the antibiotic was replaced by ethidium bromide, suggesting that EEBF acts probably by inhibition of NorA, allowing the antibiotic accumulation intracellularly, and making the line more sensitive. These results point out the EEBF potential as a source of NorA inhibitors that could be used in combination with norfloxacin for treatment of infections caused by multidrug-resistant S. aureus.
Assuntos
Bauhinia/química , Resistência Microbiana a Medicamentos/efeitos dos fármacos , Norfloxacino/farmacologia , Staphylococcus aureus/efeitos dos fármacos , Antibacterianos/farmacologia , Etídio/farmacologia , Testes de Sensibilidade Microbiana , Extratos Vegetais/farmacologia , Folhas de Planta/químicaRESUMO
The oral cytotoxicity, antimicrobial and anti-demineralizing effects of a tincture from Bauhinia forficata Link tincture (BFLT) were evaluated in vitro and ex vivo. Susceptibility tests (minimum inhibitory and microbicidal concentrations-MIC and time-kill assay-MMC) were performed against planktonic oral microorganisms. The contents of phenolic compounds were investigated. Cytotoxic potential was evaluated on oral fibroblasts after 1-5 min exposure to BFLT. Blocks of sound bovine enamel (N = 60) were inoculated with a saliva pool and sustained in a multiple plaque growth system for 48 h to form a biofilm. Biofilm blocks were randomly divided into groups-G (n = 10): G1-Baseline (48 h maturation biofilm), G2-BFLT 23.2 mg/mL, G3-Ethanol 81.20 g/mL, G4-Chlorhexidine 0.12%, G5-Growth control, and G6-Blank control. Treatments (50 µL/1 min) were performed once a day for a week. Streptococcus spp. (S) and total microorganism (TM) counts were expressed as Log10 CFU/mL. Biofilm height was evaluated by confocal microscopy analyses (CMA). Final surface hardness was assessed and percentage of microhardness loss (% MHL) was calculated. Results were significant when P < .05. BFLT inhibited all tested microorganisms (MIC = 1.3-23.2 mg/mL) and promoted optical reduction (0.05-0.22 nm) of all microorganisms after 48-h treatment compared with controls. After 5-min treatment, BFLT showed low values of cell death (3.20%). G2-BFLT reduced S (6.61 ± 0.20) and TM (7.14 ± 0.38) compared with G1-Baseline (S = 7.82 ± 0.28; TM = 8.81 ± 0.67) and G5-Growth control (S = 7.48 ± 0.39; TM = 7.89 ± 0.68); but G4-chlororexidine (S = 6.11 ± 0.48; TM = 6.45 ± 0.16) showed the highest antibiofilm activity. CMA was not different among treatment groups. G2 showed lower % MHL compared with G5, although G4 presented the lowest. Results suggest BFLT is beneficial against dental caries, showing antimicrobial effects against a mature dental biofilm and no cytotoxicity.
Assuntos
Anti-Infecciosos/farmacologia , Bauhinia/química , Biofilmes/efeitos dos fármacos , Cárie Dentária/prevenção & controle , Extratos Vegetais/farmacologia , Animais , Bovinos , Células Cultivadas , Fibroblastos/efeitos dos fármacos , Dureza , Testes de Sensibilidade MicrobianaRESUMO
Bisphenol A (BPA) is an abundant raw material applied in the production of daily necessities, such as food cans, baby bottles, electronic and medical equipment. Phytotherapeutic use of plant preparations has long been known for multiple target medicinal uses. The species Bauhinia forficata is widely used as hypoglycemic, anti-inflammatory, antioxidant, diuretic and hypocholesterolemic agent. The aim of this study was to verify the effects of B. forficata extract in association with BPA exposure on serological parameters, hepatic antioxidant status and glycogen store capacity in Wistar rats. B. forficata was able to reduce BPA-induced glucose levels; it also prevented the early glucose elevation in control and BPA-exposed animals after the glucose provocative test. This effect was related to the hepatic glycogen content; while BPA reduced the hepatic glycogen deposits B. forficata treatment contributed to minimize it. BPA and B. forficata singly caused elevation in triacylglycerol and VLDL levels and reduction in cholesterol and LDL concentrations. BPA increased hepatic malondialdehyde levels and reduced catalase activity, thus inducing liver oxidative stress. Conversely, B. forficata treatment reduced malondialdehyde concentration without interfering with catalase activity; this antioxidant capacity is attributed to the flavonoids content (e.g., kaempferol and myricetin). Based on these results, we demonstrated that B. forficata commercial extract has hypoglycemic and antioxidant properties capable of minimizing the effects of BPA. However, it should be considered that the consumption of herbal commercial extract must be judicious to avoid deleterious health effects.
RESUMO
Bauhinia forficata is a medicinal plant that has flavonoid components with hypoglycemic, antioxidant, hepatoprotective, antibacterial, antiviral and anti-inflammatory action. Aim of this study is to evaluate the action of B. forficata alcoholic extract in the male genital system of adult male Wistar rats. For that, 20 adult male Wistar rats were distributed into two experimental groups: the B. forficata group, receiving B. forficata alcoholic extract (0.1 ml/10 g body weight/day) on alternate days, and the control group, receiving just the vehicle for 30 days straight both via gavage. On the 31st day, the animals were euthanized, and the testis and epididymis were collected for histopathological, biochemical, morphometric, and sperm count analysis. Mass spectrometry identified new compounds in the extract: trans-caffeic acid, liquiritigenin, gallocatechin, and 2,4,6-trihydroxyphenanthren-2-glycoside. Biochemical analysis showed higher total cholesterol levels in the testis and lower malondialdehyde levels in the testis and epididymis, in the B. forficata group. The mast cell count showed a reduction in degranulated mast cells in the caput region of the epididymis, in the B. forficata group. The luminal compartment of the caput and the epithelial of the epididymis cauda were reduced, whereas the stromal region of the epididymis caput was increased in the B. forficata group, compared with the control group. The testicular tissue was less impaired, considering that all the histological analyses were similar to the control. We believe that B. forficata alcoholic extract in the male genital system showed antioxidant action, especially in the epididymal tissue.
Assuntos
Antioxidantes/farmacologia , Bauhinia/química , Epididimo/metabolismo , Peroxidação de Lipídeos/efeitos dos fármacos , Extratos Vegetais/farmacologia , Testículo/metabolismo , Animais , Degranulação Celular/efeitos dos fármacos , Colesterol/análise , Masculino , Malondialdeído/análise , Mastócitos/citologia , Fitoterapia , Ratos , Ratos WistarRESUMO
INTRODUCTION: Diabetes Mellitus has been considered an epidemic by the World Health Organization, with a high risk of morbidity and mortality. The treatment of this pathology consists in glycemic control, which can be done by oral hypoglycemic agents, insulin therapy, dietary guidance, regular physical activity, and psychosocial support. In addition, other adjuvant treatments are employed, such as phytotherapic, and one of the most used plants is Bauhinia forficata. AREAS COVERED: In the current review, patents using Bauhinia forficata for the Diabetes Mellitus treatment have been analyzed. There were 03 patents in WIPO, 01 in Espacenet, 01 in USPTO, and 02 in INPI. EXPERT OPINION: Patents on the adjuvant treatment of Diabetes Mellitus by Bauhinia forficata are discussed. Although there are some phytotherapy products containing this medicinal plant which has hypoglycemic effect here is still a need for the development of more products based on natural resources, for the treatment of this pathology, without side effects and with other benefits, to assist in the glycemia control in diabetic patients, and to improve their quality of life.
Assuntos
Bauhinia/química , Diabetes Mellitus/tratamento farmacológico , Extratos Vegetais/farmacologia , Animais , Glicemia/efeitos dos fármacos , Diabetes Mellitus/fisiopatologia , Desenho de Fármacos , Humanos , Hipoglicemiantes/efeitos adversos , Hipoglicemiantes/isolamento & purificação , Hipoglicemiantes/farmacologia , Patentes como Assunto , Fitoterapia/métodos , Extratos Vegetais/efeitos adversosRESUMO
Diet is a key component for development and longevity of organisms. Here, the fruit fly was used to evaluate the detrimental effects caused by consumption of high-sucrose diets (HSD), namely phenotypic responses linked to insulin signaling and oxidative stress. The protective effects of extracts from medicinal plants Syzygium cumini and Bauhinia forficata were investigated. HSD intake (15% and 30%) delayed the time to pupation and reduced the number of white pupae. In adult flies, the intake of diets was associated with mortality and increased levels of glucose+trehalose, triacylglycerols and hydrogen peroxide. Indeed, 30% HSD induced body-weight loss, mitochondrial dysfunction and changes in acetylcholinesterase, δ-aminolevulinate dehydratase and antioxidant enzymes activity. Catalase, superoxide dismutase, keap1, HSP70, dILP-5 and Insulin receptor mRNA levels were over-expressed in flies emerged from 30% HSD. The extract treatments blunted the developmental alterations elicited by diets. Syzygium cumini extract was more efficient than B. forficata in reducing hyperglycaemia, redox disturbances and the changes in mRNA expression of insulin receptor.
Assuntos
Bauhinia/química , Diabetes Mellitus Tipo 2/induzido quimicamente , Diabetes Mellitus Tipo 2/prevenção & controle , Sacarose Alimentar/efeitos adversos , Hipoglicemiantes/uso terapêutico , Estresse Oxidativo/efeitos dos fármacos , Extratos Vegetais/uso terapêutico , Syzygium/química , Animais , Antioxidantes/metabolismo , Peso Corporal/efeitos dos fármacos , Metabolismo dos Carboidratos/efeitos dos fármacos , Diabetes Mellitus Experimental , Diabetes Mellitus Tipo 2/metabolismo , Dieta , Drosophila melanogaster , Peróxido de Hidrogênio/metabolismo , Insulina/metabolismo , Insulina/fisiologia , Folhas de Planta/química , Receptor de Insulina/biossíntese , Receptor de Insulina/genética , Transdução de Sinais/efeitos dos fármacosRESUMO
Bauhinia forficata Link. is utilised as an antidiabetic in Brazilian folk-medicine; furthermore, its antioxidant properties suggest a potential usefulness in the prevention of diabetes complications associated with oxidative stress. The contribution of a flavonoid-rich fraction (FRF), HPLC-PDA-ESI-MS characterised, to the antioxidant and cytotoxic properties of B. forficata hydro-alcoholic leaves extract was evaluated for the first time. Both extract and FRF showed radical-scavenging activity and reducing power with a strong relationship with the flavonoid content found; hence, flavonoids are mainly responsible for the primary antioxidant activity of B. forficata extract. The extract significantly decreased FO-1 cell viability at the higher concentrations. FRF did not exert any effect; thus, flavonoids do not appear to be responsible for the cytotoxicity of the extract. The extract resulted virtually non-toxic against both Artemia salina and normal human lymphocytes, demonstrating potential selectivity in inhibiting cancer cell growth. Finally, no antimicrobial activity was observed against the bacteria and yeasts tested.
Assuntos
Antineoplásicos Fitogênicos/isolamento & purificação , Bauhinia/química , Fabaceae/química , Flavonoides/isolamento & purificação , Extratos Vegetais/farmacologia , Animais , Antineoplásicos Fitogênicos/farmacologia , Antioxidantes/farmacologia , Artemia/efeitos dos fármacos , Bactérias/efeitos dos fármacos , Brasil , Linhagem Celular Tumoral , Sobrevivência Celular/efeitos dos fármacos , Células Cultivadas , Ensaios de Seleção de Medicamentos Antitumorais , Flavonoides/farmacologia , Humanos , Linfócitos/citologia , Linfócitos/efeitos dos fármacos , Estresse Oxidativo/efeitos dos fármacos , Extratos Vegetais/química , Folhas de Planta/química , Folhas de Planta/toxicidade , Leveduras/efeitos dos fármacosRESUMO
INTRODUCTION: Bauhinia forficata Link. is recognised by the Brazilian Health Ministry as a treatment of hypoglycemia and diabetes. Analytical methods are useful to assess the plant identity due the similarities found in plants from Bauhinia spp. HPLC-UV/PDA in combination with chemometric tools is an alternative widely used and suitable for authentication of plant material, however, the shifts of retention times for similar compounds in different samples is a problem. OBJECTIVE: To perform comparisons between the authentic medicinal plant (Bauhinia forficata Link.) and samples commercially available in drugstores claiming to be "Bauhinia spp. to treat diabetes" and to evaluate the performance of multivariate curve resolution - alternating least squares (MCR-ALS) associated to principal component analysis (PCA) when compared to pure PCA. METHODOLOGY: HPLC-UV/PDA data obtained from extracts of leaves were evaluated employing a combination of MCR-ALS and PCA, which allowed the use of the full chromatographic and spectrometric information without the need of peak alignment procedures. RESULTS: The use of MCR-ALS/PCA showed better results than the conventional PCA using only one wavelength. Only two of nine commercial samples presented characteristics similar to the authentic Bauhinia forficata spp., considering the full HPLC-UV/PDA data. CONCLUSION: The combination of MCR-ALS and PCA is very useful when applied to a group of samples where a general alignment procedure could not be applied due to the different chromatographic profiles. This work also demonstrates the need of more strict control from the health authorities regarding herbal products available on the market.
Assuntos
Bauhinia/química , Cromatografia Líquida de Alta Pressão/métodos , Preparações de Plantas/análise , Análise de Componente Principal/métodos , Espectrofotometria Ultravioleta/métodos , Análise por Conglomerados , Análise dos Mínimos Quadrados , Análise Multivariada , Folhas de Planta/química , Preparações de Plantas/classificação , Preparações de Plantas/normas , Vigilância de Produtos Comercializados/métodos , Vigilância de Produtos Comercializados/normas , Padrões de Referência , Reprodutibilidade dos TestesRESUMO
Bauhinia forficata Link, popularly known as pata-de- vaca, unha-de-vaca, casco-de-vaca, has been widely used in traditional medicine to treat several diseases. Leaves of B. forficata are used in popular medicine as a diuretic, hypoglycemic, tonic and cleanser, and to combat elephantiasis. However, despite the wide range of ethnopharmacological data surrounding the plant, there are no scientific data demonstrating a probable anti-ulcerogenic activity conferred by use of that species. The present study aimed to evaluate the antiulcer properties of an infusion of fresh leaves of B. forficata Link. From the leaves of B. forficata, an Aqueous extract (AqE) was obtained and the phytochemical analysis showed the presence of flavonols in this extract. In the gastric ulcer induced by administration of HCl- Ethanol model performed with four different doses of AqE (125, 250, 500 and 1000 mg.Kg -1 ), the AqE showed significant preventive activity (*p<0.01) at doses of 1000 mg.Kg -1 . The antiulcer activity of AqE (1000 mg.Kg -1 ) could also be demonstrated in experimental models of NSAID-bethanechol (**p<0.001) and absolute ethanol (**p<0.001). Moreover, AqE (1000 mg.Kg -1 ) promoted a significant increase (**p<0.001) in the amount of gastric mucus. The data presented here demonstrated the potential gastroprotective activity from AqE, possibly attributed to the presence of flavonols in this extract. These results may serve as a s Medicinal plants as an alternative therapy to increase immune resistanceupport for the development of new treatments related to the pathology of gastric ulcer.(AU)
Assuntos
Animais , Masculino , Ratos , Úlcera Gástrica , Flavonoides , Bauhinia , Extratos Vegetais , Ratos WistarRESUMO
No Brasil, os produtos fitoterápicos são considerados medicamentos, sendo necessário o estabelecimento de estudos que assegurem a manutenção dos requisitos de qualidade durante o processamento e o armazenamento. Testes de dissolução podem ser empregados para se estimar a biodisponibilidade de um fármaco, sendo uma análise rotineira no desenvolvimento e controle de qualidade de medicamentos alopáticos. A determinação do perfil de dissolução de fitoterápicos também pode ser um importante critério para avaliação da sua qualidade lote-a-lote, bem como para os estudos de desenvolvimento e de estabilidade. O objetivo deste trabalho foi investigar a influência dos métodos de secagem e da condição de armazenagem sobre os perfis de dissolução dos flavonoides totais de extratos secos de duas plantas medicinais bastante difundidas no Brasil, a Bauhinia forficata e a Passiflora alata. Os extratos secos foram produzidos pelo processo de secagem em leito de jorro e em spray drying, sendo submetidos a condições de armazenagem aceleradas (temperatura de 40 ± 2ºC e umidade relativa de 75 ± 5%, por um período de 90 dias). Os perfis de dissolução foram obtidos para amostras de extratos secos antes e após o período de armazenamento. O teor de flavonoides totais foi quantificado por espectrofotometria. Os extratos secos de B. forficata e P. alata apresentaram adequada liberação de flavonoides nos ensaios de dissolução. Os extratos secos de Passiflora alata apresentaram completa dissolução dos flavonoides, 92% e 98% dos teores originais após 60 minutos de ensaio, respectivamente para o extrato seco em leito de jorro e em spray drying.
In Brazil, most of the herbal medicinal products are considered as medicine. Therefore, it is necessary the establishment of tests to guarantee the maintenance of quality requirements during their processing and storage. The dissolution test is used to estimate the bioavailability of drugs and is routinely used in the development and the quality control of allopathic medicines. The determination of the dissolution profile of herbal products can also be an important criterion for assessing the batch-to-batch quality as well as for studies of product development and stability. This work aimed to investigate the dissolution profiles of dried extracts of two medicinal plants widely used in Brazil, the Bauhinia forficata and Passiflora alata, by assessing the effect of the drying methods and storage condition on the release of the total flavonoid contents. Spouted bed and spray drying were the processes used for the production of the dried extracts. The products were subjected to accelerated storage conditions (temperature of 40 ± 2ºC and relative humidity of 75 ± 5%, for 90 days). The dissolution profiles of the dried extracts, before and after storage, were determined. The concentration of total flavonoids was quantified by spectrophotometry. Adequate dissolution profiles of flavonoids from B. forficata and P. alata were obtained for all the dried extracts produced. The dried extracts of Passiflora alata showed the complete dissolution of flavonoids in the dissolution media investigated, respectively 92% and 98% of flavonoids present in the dried extracts in spouted bed and spray drying after 60 minutes of the dissolution testing.
Assuntos
Extratos Vegetais/análise , Passiflora/classificação , Bauhinia/classificação , Dissolução/análise , Armazenamento de Produtos , Medicamento FitoterápicoRESUMO
Diabetes mellitus type 2 is a metabolic disorder characterized by chronic hyperglycemia, and an important cardiovascular risk factor with a high morbidity and mortality worldwide. Phytotherapy can be an useful complement in the treatment of chronic diseases, so the hypoglycemic effect of Bauhinia forficata (L) subsp. pruinosa (Fabaceae) was evaluated, as used in Chilean traditional medicine. The content of rutin (R) and trigonelline (T) in aqueous extracts (0.15 and 1.0 percent infusions) and lyophilized extract from leaves of B. forficata were determined by HPLC. It was obtained 2.80 ugR/mL and 2.87 ugT/mL for 0.15 percent infusion, 12.48 ugR/mL and 16.24 ugT/mL for 1.0 percent infusion, and 5.70 ugR/mL and 8.14 ugT/mL for the lyophilized extract (0.1percent). Subsequently, a pilot clinical study in diabetic and prediabetic volunteers (n = 15) was performed, taking one dose of the 0.15 percent infusion, three times a day after meals, for 3 months. The results showed a significant statistically reduction in percent of HbA1c of 0.57 +/- 0.83 (p = 0.0179), suggesting that the 0.15 percent infusion of B. forficata could be useful in the prevention or complementary treatment of diabetes...
La diabetes mellitus tipo 2 es una alteración metabólica caracterizada por hiperglicemia crónica, y un importante factor de riesgo cardiovascular con elevada morbimortalidad a nivel mundial. La Fitoterapia puede ser un complemento útil en el tratamiento de enfermedades crónicas, por lo que se evaluó el efecto hipoglicemiante de Bauhinia forficata (L) subsp. pruinosa (Fabaceae), según su uso en medicina tradicional Chilena. Se determinó mediante HPLC el contenido de rutina (R) y trigonelina (T) en infusos (0.15 por ciento y 1.0 por ciento) y extracto acuoso liofilizado de las hojas de B. forficata. Se obtuvo para el infuso 0.15 por ciento = 2.80 ugR/mL y 2.87 ugT/mL, infuso 1.0 por ciento = 12.48 ugR/mL y 16.24 ugT/mL, y en el extracto liofilizado 0.1 por ciento = 5.70 ugR/mL y 8.14 ugT/mL. Posteriormente, se realizó un estudio clínico piloto en voluntarios diabéticos y prediabéticos (n = 15), tomando una dosis del infuso al 0.15 por ciento, tres veces al día después de las comidas, durante 3 meses. Los resultados mostraron una reducción estadísticamente significativa del por ciento de HbA1c de 0.57 +/- 0.83 (p = 0.0179), sugiriendo que el infuso de hojas de B. forficata (0.15 por ciento) podría ser útil en la prevención o tratamiento complementario de la diabetes...
Assuntos
Humanos , Bauhinia/química , /tratamento farmacológico , Extratos Vegetais/administração & dosagem , Hipoglicemiantes/administração & dosagem , Alcaloides/análise , Cromatografia Líquida de Alta Pressão , Extratos Vegetais/química , Medicina Tradicional , Fitoterapia , Rutina/análiseRESUMO
Bauhinia forficata é uma leguminosa nativa da Mata Atlântica vulgarmente conhecida como pata de vaca. Ela ocorre em quase todos os tipos de solos e sua madeira é usada na produção de papel, lenha e peças de carpintaria e, suas folhas como alimentação animal. É também empregada como cobertura vegetal, planta ornamental, mas sobre tudo, é uma planta medicinal. Seus principais componentes biologicamente ativos incluem compostos flavonóides que parecem ser os grandes responsáveis por suas propriedades farmacológicas, no entanto, terpenos, esteróides, ácidos aromáticos, quinonas, lactonas, alcalóides, inibidores de proteases, proteases e lectinas têm sido isolados e purificados a partir de diferentes órgãos de várias espécies do gênero Bauhinia. Estes novos compostos têm sido caracterizados e suas propriedades farmacológicas são objetos de intensas investigações. As folhas, as flores e as cascas do caule de B. forficata têm sido usadas na medicina popular para o tratamento de diferentes tipos de patologias, especialmente diabetes, dores e processos inflamatórios.(AU)
Bauhinia forficata is a legume native from Atlantic Forest named as cowage. It occurs in almost all types of soils, its wood is used in the production of pulp and paper, wood and carpentry and its leaves employed as animal feed. It is also used in plant cover, as an ornamental plant, but, more importantly, as a medicinal plant. Among the most important biologically active ingredients include are flavonoid compounds that appear to be largely responsible for its pharmacological properties. However, terpenes, steroids, aromatic acids, quinones, lactones, alkaloids, lectins and protease inhibitors have also been isolated and purified from various organs of several species of the genus Bauhinia. These new compounds have been characterized and their pharmacological properties are the purpose of intense investigation. The leaves, seeds and stem from Bauhinia species have been used in folk medicine for the treatment of different kinds of diseases and conditions, especially diabetes, infection, pain and inflammatory processes.(AU)
Assuntos
Humanos , Bauhinia , Diabetes Mellitus/tratamento farmacológico , Fitoterapia/métodos , Brasil , Bauhinia/química , Medicina TradicionalRESUMO
BACKGROUND: Plant lectins have attracted great interest in cancer studies due to their antitumor activities. These proteins or glycoproteins specifically and reversibly bind to different types of carbohydrates or glycoproteins. Breast cancer, which presents altered glycosylation of cell surface glycoproteins, is one of the most frequent malignant diseases in women. In this work, we describe the effect of the lectin Bauhinia forficata lectin (BfL), which was purified from B. forficata Link subsp. forficata seeds, on the MCF7 human breast cancer cellular line, investigating the mechanisms involved in its antiproliferative activity. METHODS: MCF7 cells were treated with BfL. Viability and adhesion alterations were evaluated using flow cytometry and western blotting. RESULTS: BfL inhibited the viability of the MCF7 cell line but was ineffective on MDA-MB-231 and MCF 10A cells. It inhibits MCF7 adhesion on laminin, collagen I and fibronectin, decreases α1, α6 and ß1 integrin subunit expression, and increases α5 subunit expression. BfL triggers necrosis and secondary necrosis, with caspase-9 inhibition. It also causes deoxyribonucleic acid (DNA) fragmentation, which leads to cell cycle arrest in the G2/M phase and a decrease in the expression of the regulatory proteins pRb and p21. CONCLUSION: BfL shows selective cytotoxic effect and adhesion inhibition on MCF7 breast cancer cells. GENERAL SIGNIFICANCE: Cell death induction and inhibition of cell adhesion may contribute to understanding the action of lectins in breast cancer.
Assuntos
Neoplasias da Mama/tratamento farmacológico , Adesão Celular/efeitos dos fármacos , Morte Celular/efeitos dos fármacos , Lectinas/farmacologia , Bauhinia/química , Neoplasias da Mama/patologia , Sobrevivência Celular/efeitos dos fármacos , Feminino , Humanos , Integrinas/metabolismo , Lectinas/química , Células MCF-7RESUMO
A chromatographic fingerprint is a comprehensive method that reveals the distinctive pattern of peaks across the chromatogram for a given sample. It is considered an effective strategy to assess the identity and quality of herbal materials, as well as for the control of the quality of their derived products. HPLC is the most employed technique for these purposes and it is used routinely for quality control in industry. Hence, its impact on the environment should not be neglected. This work provides a rational and generic procedure to qualitatively fingerprint complex matrices. Resource- and time-saving experimental designs were selected; an alternative safer organic solvent was tested and a time-saving and innovative response entitled the green chromatographic fingerprinting response was developed and employed. This procedure was applied in the development of chromatographic fingerprints for extracts of Bauhinia forficata and Casearia sylvestris. Moreover, the response proposed here can be combined with a complementary metric available in the literature to compare methods using different solvents. According to this, the chromatographic fingerprints developed here using ethanol as the organic solvent provided a performance better than that of reference methods in which more harmful acetonitrile or methanol were employed.
Assuntos
Bauhinia/química , Casearia/química , Cromatografia Líquida de Alta Pressão/métodos , Química Verde/métodos , Extratos Vegetais/química , Extratos Vegetais/isolamento & purificação , Extração em Fase Sólida/métodos , Bauhinia/metabolismo , Casearia/metabolismo , Metaboloma , Extratos Vegetais/metabolismoRESUMO
Inúmeros esforços têm sido dirigidos para conferir às plantas seu real papel e valor na terapia. Este estudo teve como objetivo avaliar a atividade antimicrobiana, mutagênica, toxicidade, e os efeitos no crescimento e diferenciação de Herpetomonas samuelpessoai, do extrato hidroalcoólico de Bauhinia forficata. Para avaliar a atividade antimicrobiana foi realizado o teste de difusão em ágar, bem como a determinação das concentrações inibitória (CIM) e microbicida mínimas (CMM). O potencial clastogênico e/ou aneugênico, in vivo, foi avaliado usando o teste do micronúcleo em medula óssea de camundongos Swiss albinus. Foi determinada também a dose letal média (DL50). O extrato inibiu o crescimento de oito bactérias, mostrando-se mais ativo para Gram-positivas e não foi eficiente para os fungos, tendo sido ativo nas concentrações de 2000, 1000, 500 e 250 mg/mL contra os microrganismos testados. Os resultados mostraram que nas concentrações administradas (500, 1000 e 2000 mg/Kg), não houve aumento estatisticamente significativo de micronúcleos. Não houve ação no crescimento e diferenciação de Herpetomonas samuelpessoai nas concentrações testadas. Com relação a DL50, o extrato não apresentou toxicidade.
Numerous efforts have been directed to discover the role and the value of plants in therapy. This work aimed to evaluate the antimicrobial activity, mutagenicity, toxicity and effects on growth and differentiation of Herpetomonas samuelpessoai of the hydroalcoholic extract of Bauhinia forficata. To evaluate the antimicrobial activity it was performed the agar diffusion test, minimum inhibitory (MIC) and microbicidal (MMC) concentrations. The in vivo clastogenic and / or aneugênic potential was evaluated using the micronucleus test in mice bone marrow Swiss albinus. It was also determined the median lethal dose (LD50). The extract inhibited the growth of eight bacteria, being more active against Gram-positiveones, and was not active against fungi. The microorganisms tested had MIC concentrations of 2000, 1000, 500 and 250 mg / mL. The results showed that the tested concentrations (500, 1000 and 2000 mg / kg) had no statistically significant increasedthe micronucleus. There was no action on the growth and differentiation of Herpetomonas samuelpessoai at the concentrations tested. In respect to the LD50, the extract showed no toxicity.
Assuntos
Animais , Masculino , Feminino , Camundongos , Trypanosomatina/crescimento & desenvolvimento , Bauhinia/efeitos dos fármacos , Anti-Infecciosos/farmacologia , Testes de MutagenicidadeRESUMO
O Diabetes mellitus, por tratar-se de uma doença crônica e por apresentar um crescimento acentuado na sociedade brasileira, tornou-se alvo da comunidade científica na busca de novas alternativas terapêuticas. Diversos estudos estão sendo desenvolvidos com o objetivo de comprovar as aparentes propriedades farmacológicas de espécies vegetais empregadas no tratamento desta enfermidade. Sendo assim, a Bauhinia forficata Link, comumente conhecida como pata-de-vaca, figura entre as espécies mais utilizadas para esse fim. Dentre os representantes de Bauhinia, a que apresenta maior número de estudos referentes à atividade hipoglicemiante e antidiabética é a espécie referida. Isto, pois, devido as suas atividades farmacológicas, diversos estudos relatam seus aspectos botânicos, composição química e eficácia. Esse constante interesse em seu estudo se mostra imperioso para sua utilização de forma segura e eficaz, possibilitando o desenvolvimento de formas farmacêuticas para o tratamento de diabetes.
Diabetes mellitus is a chronic disease with an ever-increasing incidence in Brazil and has become the object of scientific research into the search for novel therapeutic alternatives. A number of studies have been developed to demonstrate the pharmacological properties of plant species employed in folk medicine for the treatment of this disease. One such plant is the Brazilian white orchid tree, Bauhinia forficate Link, known locally as pata-de-vaca [cow foot]. Among representatives of the genus Bauhinia, this species has the greatest number of studies addressing its botanical aspects, chemical composition and effectiveness in terms of hypoglycemic and anti-diabetic activity. Studies on this plant are important to the safe, effective development of pharmaceutical products for the treatment of diabetes.
Assuntos
Diabetes Mellitus , Fabaceae , Medicamento Fitoterápico , Plantas MedicinaisRESUMO
Folhas da espécie vegetal Bauhinia forficata Link, popularmente conhecida como pata de vaca, apresentam amplo potencial terapêutico no tratamento do diabetes mellitus. Amostras desta espécie vegetal, obtidas em duas regiões do Brasil (Minas Gerais e Paraná), foram submetidas à caracterização fitoquímica e físico-química (granulometria, perda por dessecação, teor de cinzas e teor de extrativos) para realização de um estudo comparativo entre indivíduos cultivados em regiões distintas, bem como estabelecimento de especificações para seu controle de qualidade. Para a caracterização fitoquímica, extratos metanólicos das amostras foram avaliados através de cromatografia de camada delgada (CCD) para pesquisa das principais classes de metabolitos secundários. Enquanto que, para as análises físico-químicas foram adotadas metodologias farmacopeicas. A análise estatística dos dados realizou-se através dos testes F de Fischer e t de Student. De acordo com a avaliação fitoquímica foi possível observar um perfil similar para ambas as amostras com presença dos seguintes grupos: flavonóides, proantocianidinas, leucoantocianidinas, triterpenos, esteróides, açúcares redutores, além de substâncias antioxidantes com bandas coincidentes às dos compostos flavonoídicos. Por outro lado, as amostras apresentaram algumas propriedades físico-químicas diferentes tais como granulometria e umidade residual em virtude da origem e do processamento adotados pelos fornecedores. Já os valores do teor de cinzas mostraram-se dentro das especificações e não foi observada diferença significativa para o teor de extrativos. Os resultados obtidos neste trabalho contribuíram no processo de identificação e padronização de parâmetros de qualidade para as folhas de B. forficata.
Leaves of the plant species Bauhinia forficata Link, popularly known as pata de vaca, have broad therapeutic potential in treating diabetes mellitus. Aiming to establish specifications for quality control of the specie, samples of plant material obtained from two regions of Brazil (Minas Gerais and Paraná), were subjected to phytochemical and physicochemical characterization (grain size, loss on drying, ash content and extractives). For phytochemical characterization, methanolic extracts of samples were evaluated by thin layer chromatography (TLC) to search the main classes of secondary metabolites. While for the physicochemical analyses were followed Pharmacopoeic procedures. The statistical analysis was performed using the Fisher F test and Student t test. According to phytochemical evaluation was observed one similar profile for both samples with the presence of following groups: flavonoids, proanthocyanidins, leucoanthocyanidins, triterpenes, steroids, sugars, and antioxidants with similar bands of flavonoid compounds. On the other hand, the samples showed some different physicochemical properties such as particle size and content residual moisture because of the origin and processing adopted by suppliers. In turn the values of ash showed to be within specifications and there was no significant difference in the extractive content. The results of this work contributed to the process of identification and standardization of quality parameters for the leaves of B. forficata