RESUMO
Smoking is recognized as the major cause of lung cancer. Healthcare professionals play an important role in lung cancer prevention policies, as they act as a source of guidance for patients and advocates. The following survey evaluated prevalence, knowledge, and attitudes toward tobacco smoking among a sample of workers in "IRCCS Istituto Tumori "Giovanni Paolo II" of Bari, an Italian cancer hospital. An anonymous questionnaire was completed by 104 healthcare professionals to collect personal and occupational data about smoking status, knowledge about the harms of smoking, current legislation in place, Second-Hand Smoke (SHS) awareness, and, for ex-smokers, the reasons for quitting. Among participants, 17.8% were current smokers, 26.2% former smokers, and 56% never smoked. Only 40% acknowledged that the smoking ban is generally respected, and 63.2% reported that they smoke during working hours. Most of the participants perceived tobacco control policy as an efficient way to protect public health. Currently, the implementation of Italian anti-smoking legislation has so far improved neither smoking cessation rates nor the will to quit smoking completely. Our experience highlights that to date the anti-smoking strategies have limited efficacy even in a cancer center; in fact, there is still a large prevalence of smokers among hospital personnel. Therefore, it is strongly suggested that interventions be shared with all healthcare workers, specifically aimed at developing a culture of health promotion.
Assuntos
Neoplasias , Nicotiana , Conhecimentos, Atitudes e Prática em Saúde , Pessoal de Saúde , Humanos , Itália/epidemiologia , Neoplasias/epidemiologia , Neoplasias/prevenção & controle , Percepção , Prevalência , Inquéritos e QuestionáriosRESUMO
Rutaceae are widely used in ethnomedicine to treat infectious diseases in humans and plants. In this study, the antifungal activity of the Vepris macrophylla leaf essential oil (VEO) and its main components, citral and citronellol, was evaluated against six phytopathogenic fungi. In addition, the possible action of VEO on the synthesis of mycotoxins was evaluated as well. To determine the antifungal activity of VEO we used the agar dilution method and VEO showed inhibitory activity against all the tested fungi. In particular, VEO resulted to be fungicidal against Phytophthora cryptogea and Fusarium avenaceum. For all other fungi VEO exhibited fungistatic activity and the weakest effect was observed on Alternaria solani. Citral was very effective against P. cryptogea, F. avenaceum, F. poae and F. graminearum. On the other hand, citronellol showed good activity towards P. cryptogea and F. avenaceum and weaker activity towards F. poae and F. graminearum. It can be concluded that VEO can be considered a promising antifungal agent, especially against P. cryptogea and F. avenaceum, suggesting a possible use in the formulation of new selective and natural fungicides.
Assuntos
Fungos/crescimento & desenvolvimento , Fungicidas Industriais/farmacocinética , Micotoxinas/metabolismo , Óleos Voláteis/farmacologia , Rutaceae/química , Monoterpenos Acíclicos/química , Monoterpenos Acíclicos/farmacologia , Alternaria/efeitos dos fármacos , Alternaria/crescimento & desenvolvimento , Contagem de Colônia Microbiana , Fungos/classificação , Fungos/efeitos dos fármacos , Fungicidas Industriais/química , Fusarium/efeitos dos fármacos , Fusarium/crescimento & desenvolvimento , Óleos Voláteis/química , Phytophthora/efeitos dos fármacos , Phytophthora/crescimento & desenvolvimento , Folhas de Planta/química , Óleos de Plantas/química , Óleos de Plantas/farmacologiaRESUMO
INTRODUCTION: Very rarely fruit pulp has been used in in vitro culture to produce secondary metabolites useful in promoting health. OBJECTIVES: The aims of this work were the study of the best conditions to obtain the callus cultures from the pulp of two varieties of apples, Golden Delicious (GD) and "Mela Rosa Marchigiana" (MRM), and the quali-quantitative analysis of secondary metabolites produced by the two in vitro callus cultures. METHODOLOGY: Callus was induced on both Murashige and Skoog and Gamborg B5 media containing various combinations of supplements. To achieve the maximum recovery of secondary metabolites produced, preliminary extraction tests were carried out on GD apple culture using two different organic solvents (MeOH and EtOAc). The quali-quantitative analysis of the methanolic extract of both cultures was carried out by ESI-MSn and GC-MS techniques. RESULTS: The GC-MS analysis revealed the presence of triterpenic acids, in particular, oleanolic, ursolic, maslinic, pomolic, tormentic, corosolic and annurcoic acid along with a phytosterol, ß-sitosterol. In addition, GD callus culture produced phloridzin, absent in the MRM culture. In this last culture, however, the total amount of secondary metabolites was markedly higher. The in vivo production of these bioactive compounds were also quantified in the GD and MRM apple pulps. CONCLUSION: Apple pulps produced higher amounts of triterpenic acids in vitro than in vivo. The present work can be considered a method to amplify the production of important secondary metabolites which exert beneficial effects on human health. Copyright © 2016 John Wiley & Sons, Ltd.
Assuntos
Malus/metabolismo , Triterpenos/metabolismo , Cromatografia Gasosa-Espectrometria de Massas , Malus/classificação , Espectrometria de Massas por Ionização por ElectrosprayRESUMO
The chemical composition of the essential oil of the flowering aerial parts of Monarda didyma L. cultivated in central Italy was analyzed by Gas Chromatography/Mass Spectrometry (GC/MS). The major compounds of the oil were thymol (59.3%), p-cymene (10.3%), terpinolene (9.2%), δ-3-carene (4.4%), myrcene (3.7%), and camphene (3.4%). The essential oil was tested in vitro for its anti-germination activity against Papaver rhoeas L., Taraxacum officinale F. H. Wigg., Avena fatua L., Raphanus sativus L. and Lepidium sativum L. seeds, demonstrating good inhibitory activity in a dose-dependent way. The exposure of the employed weed seeds to M. didyma essential oil and thymol solution (59.3%) increased the level of hydrogen peroxide (H2O2) and malondialdehyde (MDA), markers of oxidative stress, in emerging 5-day-old rootlets.
Assuntos
Monarda/química , Óleos Voláteis/química , Óleos Voláteis/farmacologia , Plantas Daninhas/efeitos dos fármacos , Sementes/efeitos dos fármacos , Cromatografia Gasosa-Espectrometria de Massas , Germinação/efeitos dos fármacos , Peróxido de Hidrogênio/análise , Peróxido de Hidrogênio/metabolismo , Peroxidação de Lipídeos/efeitos dos fármacos , Malondialdeído/metabolismo , Óleos Voláteis/isolamento & purificação , Plantas Daninhas/metabolismo , Sementes/metabolismoRESUMO
By bioguided fractionation of the hexane extract of Commiphora erythraea resin we isolated four furanosesquiterpenoids that were tested for their protective activity against oxidative stress. Furanodienone and 1,10(15)-furanogermacra-dien-6-ones showed to be potent inhibitors of lipid peroxidation (IC(50) of -0.087 µM), being more active than the methoxylated analogues. Furthermore, using BV2 microglial cells, we found that furanodienone from C. erythraea is able to counteract LPS-induced cell death and decrease LPS-induced NO generation thus protecting microglial cells from LPS-induced cytotoxicity. Finally, docking studies were undertaken to gain insight into the possible binding mode of the isolated compounds at 5-LOX binding site.
Assuntos
Commiphora/química , Estresse Oxidativo/efeitos dos fármacos , Substâncias Protetoras/farmacologia , Resinas Vegetais/farmacologia , Animais , Morte Celular/efeitos dos fármacos , Linhagem Celular , Humanos , Concentração Inibidora 50 , Peroxidação de Lipídeos/efeitos dos fármacos , Lipopolissacarídeos/farmacologia , Camundongos , Microglia/citologia , Microglia/efeitos dos fármacos , Microglia/metabolismo , Modelos Moleculares , Extratos Vegetais/farmacologia , Substâncias Protetoras/química , Espécies Reativas de Nitrogênio/metabolismo , Resinas Vegetais/química , Resinas Vegetais/isolamento & purificação , Soluções , Estereoisomerismo , TermodinâmicaRESUMO
Plant extracts and/or secondary metabolites are receiving considerable attention as therapeutic agents for treating inflammatory diseases such as periodontitis, which affects the tooth supporting tissues. The aim of this study was to investigate the effect of a Grindelia robusta extract enriched in saponins and polyphenols on Aggregatibacter actinomycetemcomitans lipopolysaccharide (LPS)-induced inflammatory mediator (IL-6, TNF-a, RANTES, MCP-1, PGE(2) ) and matrix metalloproteinase (MMP-1, -3, -7, -8, -9, -13) secretion by macrophages. LPS induced a marked increase in the secretion of all inflammatory mediators and MMPs tested by macrophages, as determined by enzyme-linked immunosorbent assays. At non-cytotoxic concentrations, the G. robusta extract inhibited dose-dependently the secretion of IL-6, RANTES, MCP-1 and, to a lesser extent, PGE(2) and TNF-a. Such inhibition was also observed for MMP-1, -3, -7, -8, -9 and -13 secretion. This ability of G. robusta extract to reduce the LPS-induced secretion of inflammatory mediators and MMPs was associated with a reduction of nuclear factor-kappa B (NF-kB) p65 activation. The results suggest that G. robusta extract possesses an antiinflammatory therapeutic potential through its capacity to reduce the accumulation of inflammatory mediators and MMPs.
Assuntos
Anti-Inflamatórios/farmacologia , Grindelia/química , Macrófagos/efeitos dos fármacos , Extratos Vegetais/farmacologia , Humanos , Mediadores da Inflamação/metabolismo , Lipopolissacarídeos/farmacologia , Macrófagos/metabolismo , Metaloproteinases da Matriz/metabolismo , Pasteurellaceae/química , Células U937RESUMO
This article investigates the effects of tobacco control policies on smoking initiation, cessation and prevalence by examining the papers published in the last 5 years. Twenty-one articles have been selected by two authors and sorted by four types of tobacco control: tobacco prices, anti-smoking campaigns for young people, mass media intervention and public smoking bans. Price/tax increase has deterrent effect on smoking initiation but does not promote smoking cessation; intervention on young people could reduce the smoking initiation if carried out at an early age and if acted on social skills and with peer-led approach, as opposed to restraining measures which hare generally easily circumvented by young people. The mass media campaigns showed positive effect on attempts to quit among smokers if carried forward over time and by involving multiple communication channels (TV, internet, radio). The bans in public have little effect on smoking cessation but could improve the overall well-being of non-smokers. Heterogeneous results have been described by different studies probably because of different research methodologies, cultural aspects and the really effective implementation of the rules for each country. In conclusion, comprehensive tobacco control interventions to reduce smoking prevalence and modify the smoking behavior are recommended. Moreover, the use of e-cigarettes and heat-not-burn (HnB) products, as possible helping tool for smoke cessation, currently remains controversial.
RESUMO
BACKGROUND: In Europe the prevalence of tobacco use in adults and adolescents is among the highest within the WHO regions. Many resources have been allocated toward the prevention and support for smoking cessation. However, the implemented strategies in Europe have not been systematically evaluated. METHODS: A systematic literature review was carried out to identify studies that analyzed the efficacy of the main smoking-prevention campaigns conducted in Europe. PRISMA guidelines were used to systematically review and extract data. RESULTS: A total of 24 studies meeting inclusion criteria were identified. Each article was thoroughly reviewed and evaluated for quality, design, and methodology, with reference to the main areas of intervention: school (8); mass media (4) and technological tools (4); smoke-free environments (3); packaging (2) and taxes (3). The school programmes focusing on building skills to recognize and resist negative influences, the intensive use of media and technological equipments, health warnings and excise taxes have showed to be effective tools in reducing the tobacco use. CONCLUSIONS: Intervention programmes to implement tobacco control policies and smoking cessation are active in many European countries. However, these programmes need to be constantly sustained to achieve a long term efficacy.
Assuntos
Prevenção do Hábito de Fumar/métodos , Adolescente , Adulto , Europa (Continente) , Recursos em Saúde , Humanos , Meios de Comunicação de Massa , NicotianaRESUMO
INTRODUCTION: Smoking is the major risk factor for cancer and several respiratory diseases. Quitting smoking at any point of life may increase the effectiveness of treatments and improve prognosis of patients with any pulmonary disease, including lung cancer. However, few institutions in Europe offer to patients adequate counseling for smoking cessation. OBJECTIVES: Aim of this study was to investigate the level of counseling for smoking cessation offered by healthcare professionals to patients and their appreciation towards the intervention itself. METHODS: Between January 2013 and February 2016, 490 patients, diagnosed with a respiratory diseases, were prospectively evaluated with an anonymous survey developed by WALCE (Women Against Lung Cancer in Europe). RESULTS: The majority of patients enrolled (76%) declared to have stopped smoking after the diagnosis of a respiratory disease, 17% to smoke less, 7% to continue smoking. Patients who reported to have never received any counseling for smoking cessation were 38%. Almost 73% of the other patients reported a positive judgment about the quality of healthcare's intervention. Despite these favorable considerations, 83% of patients have disclosed they simply quit smoking overnight without help, 5% have used electronic cigarettes, 5% nicotine replacement treatments, 4% dedicated books, 3% have attended a referral clinic. CONCLUSIONS: Considering all the smoking-related side effects, greater efforts should be made in order to better support patients in smoking cessation. Smoking should be considered as a real physical disorder and similar surveys should be encouraged with the aim to fight the 'stigma' of smoking that still exists among patients.
Assuntos
Aconselhamento/métodos , Doenças Respiratórias/epidemiologia , Prevenção do Hábito de Fumar/métodos , Fumar/efeitos adversos , Inquéritos e Questionários , Adolescente , Adulto , Idoso , Feminino , Seguimentos , Humanos , Itália/epidemiologia , Masculino , Pessoa de Meia-Idade , Morbidade/tendências , Prognóstico , Doenças Respiratórias/diagnóstico , Estudos Retrospectivos , Fatores de Risco , Fumar/epidemiologia , Abandono do Hábito de Fumar/métodos , Adulto JovemRESUMO
The chemical composition of the essential oil obtained from Grindelia robusta aerial parts from central Italy was analyzed by GC and GC/MS and 45 components were identified. Borneol (15.2%), alpha pinene (10.3%), trans-pinocarveol (7.0%), bornyl acetate (4.5%), limonene (4.3%) were the main components. The antioxidant activity of the essential oil was evaluated using the DPPH and 5-lipoxygenase tests.
Assuntos
Antioxidantes/farmacologia , Grindelia , Fitoterapia , Óleos de Plantas/farmacologia , Antioxidantes/administração & dosagem , Antioxidantes/química , Antioxidantes/uso terapêutico , Araquidonato 5-Lipoxigenase/química , Compostos de Bifenilo , Humanos , Itália , Espectrometria de Massas , Medicina Tradicional , Picratos/química , Componentes Aéreos da Planta , Óleos de Plantas/administração & dosagem , Óleos de Plantas/química , Óleos de Plantas/uso terapêuticoRESUMO
Demethylfruticuline A and fruticuline A, the most abundant compounds from the surface extract of Salvia corrugata Vahl., have shown antibacterial, antitumor and cytotoxic activities. In order to obtain these icetexane diterpenes from in vitro cultures of S. corrugata, protocols were developed for callus production, micropropagation and shoot regeneration. Analysis of the regenerated shoots showed the presence of both icetexanes, micropropagated plants contained only fruticuline A, while the callus contained trace amounts of both diterpenes. The yield of fruticuline A was higher in the methanolic extract of regenerated shoots than in those of fresh leaves and fresh shoot tips. In addition to these diterpenes, the regenerated shoot and micropropagated plant extracts afforded seven other diterpenes, one icetexane and six abietanes, identified by UV, IR, 1D- and 2D-NMR and HR-MS analysis. Five compounds (19-acetoxy-7α-hydroxyroyleanone, 7ß,20-epoxy-11,12,19-trihydroxyabieta-8,11,13-triene, 7,20-dihydrofruticuline A, 7ß-acetoxy-20-hydroxy-19,20-epoxyroyleanone, 7ß-ethoxy-6ß,20:19,20-diepoxyroyleanone) were previously undescribed. Although the crude plant surface extract did not possess any antibacterial activity, methanolic extracts of in vitro tissues and two compounds, namely 7ß-acetoxy-20-hydroxy-19,20-epoxyroyleanone and 7ß-ethoxy-6ß,20:19,20-diepoxyroyleanone, isolated in suitable amounts, were active in varying degrees against multidrug resistant clinical strains of Staphylococcus aureus, Staphylococcus epidermidis, Enterococcus faecalis and Enterococcus faecium, displaying MIC values ranging from 32, 64 to 128µg/mL.
Assuntos
Abietanos/isolamento & purificação , Abietanos/farmacologia , Antibacterianos/isolamento & purificação , Abietanos/química , Antibacterianos/química , Antibacterianos/farmacologia , Biomassa , Diterpenos , Enterococcus faecalis/efeitos dos fármacos , Enterococcus faecium/efeitos dos fármacos , Testes de Sensibilidade Microbiana , Estrutura Molecular , Ressonância Magnética Nuclear Biomolecular , Folhas de Planta/química , Salvia/química , Staphylococcus aureus , Staphylococcus epidermidis/efeitos dos fármacos , EstereoisomerismoRESUMO
The chemical composition of the essential oil obtained from Teucrium marum subsp. marum (Lamiaceae) was analysed by GC/MS and 30 components were identified. Isocaryophyllene (20.24%), beta-bisabolene (14.73%), beta-sesquiphellandrene (11.27%), alpha-santalene (10.97%), dolichodial (9.38%) and, alpha-caryophyllene (7.18%) were the main components. The antimicrobial activity of the essential oil was assayed against four phytopathogenic fungi and Rhyzoctonia solani resulted to be the most sensitive microorganism with a MIC value of 250 ppm. The antioxidant activity of the essential oil was evaluated using the DPPH test, 5-lipoxygenase test and luminol/xanthine/xanthine oxidase chemiluminescence assay.
Assuntos
Antioxidantes/farmacologia , Fungicidas Industriais/farmacologia , Óleos de Plantas/química , Óleos de Plantas/farmacologia , Teucrium/química , Antioxidantes/química , Antioxidantes/isolamento & purificação , Ácido Ascórbico/farmacologia , Compostos de Bifenilo , Hidroxitolueno Butilado/farmacologia , Cromanos/farmacologia , Avaliação Pré-Clínica de Medicamentos/métodos , Ácidos Graxos/química , Ácidos Graxos/farmacologia , Sequestradores de Radicais Livres/química , Sequestradores de Radicais Livres/metabolismo , Fungicidas Industriais/química , Fungicidas Industriais/isolamento & purificação , Concentração Inibidora 50 , Testes de Sensibilidade Microbiana/métodos , Fungos Mitospóricos/classificação , Fungos Mitospóricos/efeitos dos fármacos , Monoterpenos/química , Monoterpenos/isolamento & purificação , Monoterpenos/farmacologia , Micoses/tratamento farmacológico , Micoses/microbiologia , Picratos/química , Picratos/metabolismo , Componentes Aéreos da Planta/química , Doenças das Plantas/microbiologia , Óleos de Plantas/isolamento & purificação , Sesquiterpenos/química , Sesquiterpenos/isolamento & purificação , Sesquiterpenos/farmacologia , Superóxidos/antagonistas & inibidores , Superóxidos/metabolismoRESUMO
The chemical composition of an Italian oil of tarragon (Artemisia dracunculus L.) was analyzed by GC/EIMS. The major compound of the oil was estragole (73.3%), followed by limonene (5.4%), (E)-ß-ocimene (5.3%), ß-pinene (3.4%) and (Z)-ß-ocimene (3.0%). The essential oil was tested "in vitro" for its antigermination activity against Raphanus sativus L., Lepidium sativum L, Papaver rhoeas L. and Avena fatua L. seeds and demonstrating a good inhibitory activity in a dose-dependent way.
Assuntos
Artemisia/química , Germinação/efeitos dos fármacos , Óleos Voláteis/química , Óleos de Plantas/química , Sementes/efeitos dos fármacos , Monoterpenos Acíclicos , Alcenos/química , Alcenos/farmacologia , Derivados de Alilbenzenos , Anisóis/química , Anisóis/farmacologia , Monoterpenos Bicíclicos , Compostos Bicíclicos com Pontes/química , Compostos Bicíclicos com Pontes/farmacologia , Cicloexenos/química , Cicloexenos/farmacologia , Limoneno , Monoterpenos/química , Monoterpenos/farmacologia , Óleos Voláteis/farmacologia , Óleos de Plantas/farmacologia , Sementes/crescimento & desenvolvimento , Terpenos/química , Terpenos/farmacologiaRESUMO
The total phenolic content, antioxidant and antifungal activities of three Inula crithmoides extracts (n-hexane, methylene chloride and MeOH) were investigated. The methanolic extract showed the highest total phenolic content. In the DPPH assay, the methanolic and hexane extracts exhibited the highest DPPH-radical scavenging activity; in the 5-lipoxygenase assay, the hexane extract showed greater inhibitory effect with an IC50 similar to that of Trolox and ascorbic acid. The antifungal activity of the methanolic extract revealed a higher activity against Phytophtora cryptogea and Alternaria solani.
Assuntos
Antifúngicos/farmacologia , Sequestradores de Radicais Livres/farmacologia , Inula/química , Fenóis/química , Extratos Vegetais/farmacologia , Alternaria/efeitos dos fármacos , Anti-Inflamatórios/farmacologia , Phytophthora/efeitos dos fármacos , Componentes Aéreos da Planta/química , Extratos Vegetais/químicaRESUMO
The in vitro antifungal activity was determined of an ethanolic extract of Vitis vinifera L. tendrils (TVV) against ten plant pathogenic fungi, using the agar dilution method; activity was shown against all tested fungi. Fusarium species were the most sensitive with MIC values ranging from 250 to 300 ppm, while the basidiomycete fungus Rhizoctonia solani was the most resistant, with a MIC value of 500 ppm. Electrospray ionization tandem mass spectrometry (ESI-MS(n)) was used to obtain qualitative information on the main components of TVV. The high amount of polyphenolic compounds contained in TVV is likely to contribute significantly to its antifungal activity.
Assuntos
Antifúngicos/farmacologia , Extratos Vegetais/farmacologia , Vitis/química , Antifúngicos/química , Fusarium/efeitos dos fármacos , Fusarium/crescimento & desenvolvimento , Testes de Sensibilidade Microbiana , Doenças das Plantas/microbiologia , Extratos Vegetais/química , Rhizoctonia/efeitos dos fármacos , Rhizoctonia/crescimento & desenvolvimento , Espectrometria de Massas por Ionização por ElectrosprayRESUMO
With the aim of examining the response of plant cells to extremely low frequency (ELF) electromagnetic fields (EMF), we investigated the behaviour of the phosphatidylinositol 4,5 bisphosphate (PtdIns 4,5-P(2)) molecule (the precursor of the phosphoinositide signal transduction cascade) by exposing callus cells from Peganum harmala to 50 Hz, 1 gauss EMF for 10 min and by examining the level and the fatty acid composition of PtdIns 4,5-P(2) after the exposure. Our results evidenced a statistically significant decrease in PtdIns 4,5-P(2) concentrations and a different involvement of the constituting fatty acids in the induced breakdown. The manipulation of the lipid-based signalling pathway by phosphoinositide-phospholipase C (PI-PLC) inhibitors (i.e., neomycin, U-73122 and ET-18-OCH(3)) seems to support the hypothesis that, as in animals, also in plants, the cell membrane is the primary impact site of ELF electromagnetic stimulus and that this interaction could probably involve the activation of PI signal transduction pathway including a heterotrimeric G protein.
Assuntos
Campos Eletromagnéticos , Peganum/efeitos da radiação , Fosfatidilinositol 4,5-Difosfato/efeitos da radiação , Estruturas Vegetais/efeitos da radiação , Fosfolipases Tipo C/metabolismo , Antioxidantes/farmacologia , Ácido Ascórbico/farmacologia , Membrana Celular/efeitos dos fármacos , Membrana Celular/metabolismo , Inibidores Enzimáticos/farmacologia , Ácidos Graxos/metabolismo , Peganum/efeitos dos fármacos , Peganum/metabolismo , Fosfatidilinositol 4,5-Difosfato/metabolismo , Estruturas Vegetais/efeitos dos fármacos , Estruturas Vegetais/metabolismo , Sementes/química , Fosfolipases Tipo C/antagonistas & inibidoresRESUMO
The antioxidant activity of Citrus paradisi (grapefruit) seeds glyceric extract dissolved in ethanol and in aqueous media was evaluated using three different methods: evaluation by DPPH assay, by 5-lipoxygenase assay and by luminol/xanthine/xanthine oxidase chemiluminescence assay. The total phenolic content was determined by the Prussian Blue method opportunely modified. The grapefruit seeds glyceric extract utilized as aqueous solutions demonstrated antioxidant properties better than those displayed by alcoholic solutions.
Assuntos
Antioxidantes/farmacologia , Citrus paradisi , Fitoterapia , Extratos Vegetais/farmacologia , Antioxidantes/administração & dosagem , Antioxidantes/uso terapêutico , Araquidonato 5-Lipoxigenase/química , Compostos de Bifenilo , Humanos , Medições Luminescentes , Luminol/química , Picratos/química , Extratos Vegetais/administração & dosagem , Extratos Vegetais/uso terapêutico , SementesRESUMO
The present study reports the results of gas chromatographic-mass spectrometric (GC/MS) analyses of the essential oils from the aerial parts of Ballota nigra L. ssp foetida (Lamiaceae) collected at flowering and fruiting times, as well as their in vitro antifungal activity against nine plant pathogenic fungi. Moreover, the essential oils were evaluated for their antifungal activity using the agar dilution method, and also MICs (minimum inhibitory concentrations) and MFCs (minimum fungicidal concentrations) were determined. The major compounds identified in the flowering and fruiting aerial parts oils respectively were beta-caryophyllene (22.6% and 21.8%), caryophyllene oxide (18.0% and 20.5%) and germacrene-D (16.5 and 13.1%). The oils showed in vitro antifungal activity against some species of Fusarium, Botrytis cinerea, and Alternaria solani. Our study indicates that the oil of B. nigra ssp foetida could be used as a control agent for plant pathogenic fungi in natural formulations.
Assuntos
Ballota/química , Flores/fisiologia , Frutas/fisiologia , Componentes Aéreos da Planta/química , Óleos de Plantas/química , Óleos de Plantas/farmacologia , Antifúngicos/química , Antifúngicos/farmacologia , Fusarium/efeitos dos fármacos , Óleos Voláteis/química , Óleos Voláteis/farmacologiaRESUMO
In this paper, the chemical composition and the antimicrobial activity of the essential oil of Angelica archangelica L. (Apiaceae) roots from central Italy were analyzed. The major constituents of the oil were α-pinene (21.3%), δ-3-carene (16.5%), limonene (16.4%) and α-phellandrene (8.7%). The oil shows a good antimicrobial activity against Clostridium difficile, Clostridium perfringens, Enterococcus faecalis, Eubacterium limosum, Peptostreptococcus anaerobius, and Candida albicans with minimum inhibitory concentration (MIC) values of 0.25, 0.25, 0.13, 0.25, 2.25, and 0.50% v/v, respectively. A weaker antimicrobial activity against bifidobacteria and lactobacilli-very useful in the intestinal microflora-has also been shown with MIC values >4.0% v/v.
Assuntos
Angelica archangelica/química , Anti-Infecciosos/farmacologia , Bactérias/efeitos dos fármacos , Candida albicans/efeitos dos fármacos , Óleos Voláteis/farmacologia , Extratos Vegetais/farmacologia , Terpenos/farmacologia , Antibacterianos/análise , Antibacterianos/farmacologia , Anti-Infecciosos/análise , Antifúngicos/análise , Antifúngicos/farmacologia , Monoterpenos Bicíclicos , Cicloexenos/análise , Cicloexenos/farmacologia , Limoneno , Testes de Sensibilidade Microbiana , Monoterpenos/análise , Monoterpenos/farmacologia , Óleos Voláteis/química , Extratos Vegetais/química , Raízes de Plantas/química , Terpenos/análiseRESUMO
In this paper, the volatiles emitted by flowers and various parts of the flower of a rare spontaneous Italian red (peel and flesh) apple named "Pelingo", were analyzed by SPME with the aim of identifying the contribution of each one to the whole aroma profile. Linalool was the most abundant volatile of flowers: from 43.0% in the flower buds, to 17.6% in the stylus and stigma headspace. The second most represented volatile was (E,E)-α-farnesene mainly emitted by the mature flowers (32.2%). Benzenoid compounds also have been identified: benzyl-alcohol is the most representative (1.0-16.5%) in all the samples except flower buds, while benzyl acetate (5.7%) and methyl salicylate (7.7%) are mainly present in the calyx and in the mature flowers respectively but not in the flower buds. Benzenoid compounds are the attractors for pollinator, probably for this reason were not detected in the headspace of flower buds.