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1.
Postepy Dermatol Alergol ; 37(5): 690-694, 2020 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-33240007

RESUMO

INTRODUCTION: Staphylococcal biofilm formation significantly challenges wound management. The causes of difficult-to-treat wounds are not only methicillin-resistant staphylococci, but also methicillin-sensitive strains with different patterns of resistance. Bacterial biofilm significantly limits the access and activity of antimicrobials used in dermatological infections. AIM: To evaluate the synergistic effect of fennel essential oil (FEO) and H2O2 on biofilm formation by Staphylococcus aureus (MSSA and MRSA) reference strains. MATERIAL AND METHODS: Minimum inhibitory concentration (MIC) values were determined for FEO and H2O2 against S. aureus reference strains by the broth microdilution method. The combined effects of the FEO and H2O2 were calculated and expressed in terms of a fractional inhibitory concentration index (FICI) using the checkerboard method. The FEO composition was analyzed by the GC-MS method. The data were analysed by one-way ANOVA. RESULTS: Decreased MIC values for FEO combined with H2O2 were observed in comparison to FEO itself. The combinations of FEO and H2O2 determined synergistic effects on all S. aureus reference strains. Subinhibitory concentration of FEO alone and in combination with 0.5 MIC of H2O2 significantly decreased the production of biofilm biomass in S. aureus strains and reduced the metabolic activity of attached cells. CONCLUSIONS: Combination of fennel essential oil containing nearly 80% trans-anethole and H2O2 represents a potential for further basic and applied research on wound management.

2.
Pharm Dev Technol ; 24(6): 729-738, 2019 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-30775948

RESUMO

Fennel (Foeniculum vulgare Mill.) is a member of family Apiaceae. Trans-anethole, the major component of Fennel essential oil (FEO), possesses antioxidant and hepatoprotective effects. Transdermal nanoemulsions (NEs) are advanced colloidal systems for systemic and controlled drug delivery through the stratum corneum barrier. FEO NEs were prepared using the oil Lauroglycol™ 90, as it provides a larger NE existence zone than Captex® 300, in the constructed phase diagrams. Six systems were prepared using Tween20/propylene glycol (S/CoS) in the ratios 2:1 and 3:1 with oil to S/CoS mass ratios 1:9, 2:8 and 3:7. Physicochemical characterization revealed optimum properties regarding thermodynamic stability, droplet size and pH with a Newtonian flow pattern. In vitro permeation study in rat skin revealed the highest cumulative amount permeated (µg/cm2), flux and permeability coefficient values for F4 made up of 2% FEO, 4.67% Lauroglycol™ 90, 60% S/CoS in the ratio 3:1. Results of the in vivo hepatic dysfunction study in rats indicate promising significant amelioration of liver function reflected in ALT, AST, ALP, bilirubin, albumin, malondialdehyde and ammonia plasma levels. The results signify the promising approach of FEO NEs in achieving remedy of liver toxicity. The most promising effect is inherent to F4 which imparts a more positive effect than FEO.


Assuntos
Preparações de Ação Retardada/química , Foeniculum/química , Hepatopatias/tratamento farmacológico , Óleos Voláteis/administração & dosagem , Óleos Voláteis/uso terapêutico , Administração Cutânea , Animais , Emulsões/química , Fígado/efeitos dos fármacos , Fígado/fisiopatologia , Hepatopatias/fisiopatologia , Masculino , Óleos Voláteis/química , Óleos Voláteis/farmacocinética , Polissorbatos/química , Propilenoglicol/química , Ratos , Absorção Cutânea
3.
Postepy Dermatol Alergol ; 36(3): 308-314, 2019 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-31333348

RESUMO

INTRODUCTION: Staphylococcus aureus constitutes the most pathogenic species within the staphylococcal genus. Humans remain the major reservoirs of this pathogen which colonizes mostly anterior nares of healthy individuals. AIM: To investigate the effect of fennel essential oil (FEO) and trans-anethole (tA) on antibacterial activity of mupirocin (MUP) against S. aureus strains isolated from asymptomatic carriers. MATERIAL AND METHODS: The content of the FEO was analysed with use of the GC-MS method. The research done on 43 S. aureus isolates with different resistance patterns, obtained from nasal vestibule. Antibacterial activity of MUP in combination with FEO or tA was examined using the agar dilution method and E-test method. The data analysis was done with the Pearson's χ2 test. RESULTS: The chemical composition of FEO was consistent with the European Pharmacopoeia (EP) for the main constituent - tA (77.9%) according to the EP recommendations. Macrolide-lincosamide-streptogramin B resistance phenotype was prevalent among 39.5% of S. aureus isolates. FEO concentrations of 2.0% and 2.5% revealed antibacterial activity against 76.7% of isolates, whereas tA inhibited S. aureus growth at concentrations > 4.0%. The MIC values for MUP combined with FEO as well as for MUP combined with tA were < 0.064 µg/ml for 79.1% and 86.0% of S. aureus isolates, respectively. CONCLUSIONS: Our experiment revealed FEO and tA influence on MUP effectiveness. The combination of MUP with FEO as well as MUP with tA are worth considering to implement in S. aureus eradication procedures. These findings will be useful in designing efficient antistaphylococcal agents which can limit the emergence of antibiotic resistance.

4.
Int J Biol Macromol ; 261(Pt 1): 129049, 2024 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-38176510

RESUMO

The economic burden of chronic wounds, the complexity of the process of tissue repair and the possibility of resistant bacterial infections, have triggered a significant research interest in the application of natural alternative therapies for wound healing. Biomolecules are intrinsically multi-active, as they affect multiple mechanisms involved in tissue repair phenomenon, including immunomodulatory, anti-inflammatory, cell proliferation, extra cellular matrix remodeling and angiogenesis. Chitosan features a unique combination of attributes, including intrinsic hemostatic, antimicrobial, and immunomodulatory properties, that make it an exceptional candidate for wound management, in the development of wound dressings and scaffolds. In this study, we produced nanoemulsions (NE) loaded with SFO, characterized them, and evaluated their tissue repairing properties. Dynamic light scattering (DLS) analysis confirmed the formation of a nanoemulsion with a droplet size of 21.12 ± 2.31 nm and a polydispersity index (PdI) of 0.159, indicating good stability for up to 90 days. To investigate the potential wound healing effects, SFO-loaded NE were applied on male C57BL/6 mice for seven consecutive days, producing a significantly higher wound closure efficiency (p < 0.05) for the group treated with SFO-loaded NE compared to the control group treated with the saline solution. This finding indicates that the SFO-loaded NE exhibits therapeutic properties that effectively promote wound healing in this experimental model. Then, SFO-loaded NE were incorporated into chitosan:polyvinyl alcohol (PVA)-based films. The inclusion of NE into the polymer matrix resulted in increased lipophilicity reflected by the contact angle results, while decreasing moisture absorption, water solubility, and crystallinity. Moreover, FTIR analysis confirmed the formation of new bonds between SFO-NE and the film matrix, which also impacted on porosity properties. Thermal analysis indicated a decrease in the glass transition temperature of the films due to the presence of SFO-NE, suggesting a plasticizing role of NE, confirmed by XRD results, that showed a decrease in the crystallinity of the blend films upon the addition of SFO-NE. AFM images showed no evidence of NE droplet aggregation in the Chitosan:PVA film matrix. Moisture absorption and water content decreased upon incorporation of SFO-loaded NE. Although the inclusion of NE increased hydrophobicity and water contact angle, the values remained within an acceptable range for wound healing applications. Overall, our results emphasize the significant tissue repairing properties of SFO-loaded NE and the potential of Chitosan:PVA films containing nanoencapsulated SFO as effective formulations for wound healing with notable tissue repairing properties.


Assuntos
Quitosana , Óleos Voláteis , Humanos , Camundongos , Animais , Masculino , Quitosana/química , Óleos Voláteis/farmacologia , Camundongos Endogâmicos C57BL , Cicatrização , Água/farmacologia , Álcool de Polivinil/química , Antibacterianos/farmacologia
5.
Food Chem ; 456: 139887, 2024 Oct 30.
Artigo em Inglês | MEDLINE | ID: mdl-38865819

RESUMO

Fennel essential oil (FEO) a natural spice that has versatile biological activities. However, the direct use of FEO is limited due to its water insolubility and poor stability. Chilled pork is prone to spoilage during storage. To solve these problems, this study aimed to prepare an inclusion complex (IC) of FEO with hydroxypropyl-ß-cyclodextrin via co-precipitation and apply it to the preservation of chilled pork. Results indicated that the optimal parameters were encapsulating temperature 37 °C, wall-core ratio 14:1 g/mL, stirring speed 600 r/min, and encapsulating time 240 min, obtaining an encapsulation efficiency of 83.75%. The results of scanning electron microscopy, Fourier transform infra-red spectroscopy, and nuclear magnetic resonance demonstrated the successful preparation of IC. The release of FEO from IC was controllable through adjusting the different temperatures and relative humidities. Furthermore, IC effectively delayed the spoilage of chilled pork and extended its shelf life by 6 days at 4 °C.


Assuntos
2-Hidroxipropil-beta-Ciclodextrina , Foeniculum , Conservação de Alimentos , Óleos Voláteis , Foeniculum/química , Óleos Voláteis/química , Animais , Conservação de Alimentos/métodos , Conservação de Alimentos/instrumentação , Suínos , 2-Hidroxipropil-beta-Ciclodextrina/química , Armazenamento de Alimentos , Carne de Porco/análise
6.
Toxicol Int ; 20(2): 138-45, 2013 May.
Artigo em Inglês | MEDLINE | ID: mdl-24082507

RESUMO

BACKGROUND: Cisplatin (cis-diamminedichloroplatinum II (CDDP)) is an effective drug in cancer therapy to treat solid tumors. However, the drug is accompanied by nephrotoxicity. Previous reports indicated that estrogen has no protective role against CDDP-induced nephrotoxicity, but the role of phytoestrogen as an estrogenic agent in plants is not determined yet. The major composition of fennel essential oil (FEO) is trans-anethole that has estrogenic activity; so, we used FEO as a phytoestrogen source against CDDP-induced nephrotoxicity. MATERIALS AND METHODS: Fifty-four ovariectomized Wistar rats were divided into seven groups. Groups 1-3 received different doses of FEO (250, 500, and 1000 mg/kg/day, respectively) for 10 days. Group 4 received saline for 10 days plus single dose of CDDP (7 mg/kg, intraperitoneally (ip)) at day 3. Groups 5-7 received FEO similar to groups 1-3, respectively; plus a single dose of CDDP (7 mg/kg, ip) on day 3. On day 10, the animals were sacrificed for histopathological studies. RESULTS: The serum levels of blood urea nitrogen (BUN) and creatinine (Cr), kidney tissue damage score (KTDS), and kidney weight (KW) and body weight changes in CDDP-treated groups increased significantly (P < 0.05). FEO did not reduce the levels of BUN and Cr, KTDS, and KW and body weight changes. Also, the serum and tissue levels of nitrite were not altered significantly by FEO. CONCLUSION: FEO, as a source of phytoestrogen, did not induce kidney damage. In addition, FEO similar to estrogen was not a nephroprotectant agent against CDDP-induced nephrotoxicity.

7.
Pharmaceutics ; 15(12)2023 Nov 23.
Artigo em Inglês | MEDLINE | ID: mdl-38139998

RESUMO

Diabetes is a serious pathology that affects a significant number of people worldwide. Its progression is rapid and leads to serious complications if glycemic control is missing. The micro and macrovascular complications of diabetes produce disabilities over time that affect the daily lives of patients. The major challenge of diabetes therapy is to reach a stable glycemic state and to delay the onset of specific complications. Aromatherapy is considered an alternative or complementary therapy, but in recent years, there has been a tendency to overuse essential oils. The present study was designed to evaluate and compare the effects produced by the topical and oral administration of fennel essential oil to diabetic rats. Eighteen compounds in fennel essential oil were identified by gas chromatography-mass spectrometry (GC-MS) analysis. The major compounds were trans-anethole (64.6%) and fenchone (24.5%). The in vivo study revealed that after a four-week treatment with fennel essential oil, the rats' glycemic levels were significantly reduced (p ≤ 0.05). Furthermore, there were no differences between the two routes of administration. In addition, an ex vivo study underlined the potential effect of this essential oil in the prevention of cataract formation.

8.
Int J Biol Macromol ; 230: 123119, 2023 Mar 01.
Artigo em Inglês | MEDLINE | ID: mdl-36603723

RESUMO

Ixiolirion tataricum mucilage (ITM) was characterized and applied in fabrication of ITM/chitosan (CH) blend films activated by Foeniculum vulgare essential oil (FEO) in free and nanoliposomal forms. Uniform smooth surface structure, viscoelastic solid-like behavior and Newtonian nature of ITM were confirmed by morphological and rheological analyses. The prepared FEO nanoliposomes (FEO-NLPs) showed desirable properties in terms of particle size (57.2 nm), polydispersity index (0.243), zeta-potential (-17.6 mV), and encapsulation efficiency (85.2 %). The enhancing effects of FEO-NLPs and the adverse effects of free FEO on the crystalline, morphological and structural properties of films were confirmed by XRD, FE-SEM and ATR-FTIR tests. FEO-NLPs loaded films had better mechanical, thermal, water and gas barrier and antioxidant properties than neat film. Analysis also indicated the high controlled release of FEO from the films containing the nanoliposomal form of FEO. The films containing free FEO showed higher antibacterial activity against E. coli and S. aureus in comparison with FEO-NLPs loaded ones. The results showed the potential of FEO-NLPs loaded ITM/CH films for antioxidant food packaging applications.


Assuntos
Quitosana , Foeniculum , Óleos Voláteis , Antioxidantes/farmacologia , Antioxidantes/química , Óleos Voláteis/farmacologia , Óleos Voláteis/química , Quitosana/química , Escherichia coli , Staphylococcus aureus , Polissacarídeos/farmacologia , Antibacterianos/farmacologia , Antibacterianos/química , Embalagem de Alimentos
9.
Nutrients ; 14(4)2022 Feb 10.
Artigo em Inglês | MEDLINE | ID: mdl-35215391

RESUMO

In this study, odor components were analyzed using gas chromatography/mass spectrometry (GC/MS) and solid-phase microextraction (SPME), and odor-active compounds (OACs) were identified using GC-olfactometry (GC-O). Among the volatile compounds identified through GC-O, p-anisaldehyde, limonene, estragole, anethole, and trans-anethole elicit the fennel odor. In particular, trans-anethole showed the highest odor intensity and content. Changes in body weight during the experimental period showed decreasing values of fennel essential oil (FEO)-inhaled groups, with both body fat and visceral fat showing decreased levels. An improvement in the body's lipid metabolism was observed, as indicated by the increased levels of cholesterol and triglycerides and decreased levels of insulin in the FEO-inhaled groups compared to group H. Furthermore, the reduction in systolic blood pressure and pulse through the inhalation of FEO was confirmed. Our results indicated that FEO inhalation affected certain lipid metabolisms and cardiovascular health, which are obesity-related dysfunction indicators. Accordingly, this study can provide basic research data for further research as to protective applications of FEO, as well as their volatile profiles.


Assuntos
Foeniculum , Doenças Metabólicas , Óleos Voláteis , Tecido Adiposo/química , Animais , Foeniculum/química , Metabolismo dos Lipídeos , Obesidade , Óleos Voláteis/química , Ratos
10.
Pharmaceutics ; 14(4)2022 Apr 16.
Artigo em Inglês | MEDLINE | ID: mdl-35456707

RESUMO

Plant essential oils, a source of biologically active compounds, represent a promising segment in the pharmaceutical market. However, their volatility, hydrophobicity, poor stability, and low toxicity limit direct use in pharmaceutical-related applications. Nanoencapsulation is a technique that allows overcoming these obstacles by improving bioaccessibility and bioavailability. Nanocapsules (NCs) based on biodegradable and biocompatible poly(ɛ-caprolactone) containing Foeniculum vulgare Mill. essential oil (FEO), known for its biological activities, were successfully prepared by interfacial deposition of the preformed polymer method. The composition of FEO (trans-anethole chemotype) was determined by gas chromatography analyses. The FEO presence inside the NCs was confirmed by nuclear magnetic resonance experiments. The FEO-NCs showed nanometer size (210 nm), low polydispersity index (0.10), negative zeta potential (-15 mV), non-Newtonian rheological behavior, and high efficiency of encapsulation (93%). Moreover, parameters such as FEO-NC particle size, bioactive compound retention, and FEO composition were monitored for 30 days at storage temperatures of 4 and 40 °C, confirming the robustness of the nanosystem. Finally, FEO-NCs were resistant to the simulated gastric digestion and showed an effective bioaccessibility of 29% in simulated intestinal digestion. Based on the results obtained, this FEO-NC nanosystem could find interesting applications in the nutraceutical and pharmaceutical sectors.

11.
Int J Biol Macromol ; 172: 464-474, 2021 Mar 01.
Artigo em Inglês | MEDLINE | ID: mdl-33465361

RESUMO

Porous starch (PS) was used as the core material carrier to adsorb fennel essential oil (FEO). Using sodium alginate (SA)-chitosan (CS) as the wall material and glutaraldehyde as the curing cross-linking agent, CS/SA/PS-FEO microcapsules were successfully prepared by polyelectrolyte complex coagulation method. The formation process, structural properties and release behavior of CS/SA/PS-FEO microcapsules were analyzed. The results showed that the essential oil was encapsulated in the form of micro-capsules according to infrared spectroscopy and X-ray diffraction analysis. In open and closed systems, the 16-day cumulative release rate of FEO obtained was 70.62% and 43.87%, respectively indicating that the prepared CS/SA/PS-FEO microcapsules had a good sustained-release ability. The fennel essential oil micro-capsules exhibited good antibacterial and antioxidant activities, delayed the oxidation of fat and protein, reduced the total viable counts, total volatile-base nitrogen and methemoglobin. The textural property and status of water (analyzed by NMR) suggested that the quality of the meat can be maintained for an extended period by incorporating the CS/SA/PS-FEO microcapsules in the minced pork meat.


Assuntos
Antibacterianos/farmacologia , Antioxidantes/farmacologia , Foeniculum/química , Armazenamento de Alimentos/métodos , Produtos da Carne/análise , Óleos Voláteis/farmacologia , Amido/química , Alginatos/química , Animais , Antibacterianos/isolamento & purificação , Antioxidantes/isolamento & purificação , Cápsulas , Quitosana/química , Composição de Medicamentos/métodos , Humanos , Concentração de Íons de Hidrogênio , Metemoglobina/análise , Óleos Voláteis/isolamento & purificação , Carne de Porco/análise , Porosidade , Suínos
12.
Environ Sci Pollut Res Int ; 27(8): 7957-7966, 2020 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-31893363

RESUMO

The increased use of pesticides is the origin of multiple damages to the environment and to humans; thus, the search for new strategies to reduce or even protect the toxic effects caused by these synthetic products became a necessity. In this context, our study attempted to evaluate the protective effects of fennel essential oil (FEO), the main essential oil extracted from Faeniculum vulgare Mill., a plant with aromatic, flavorful, and medicinal uses, against toxicity induced by an insecticide-triflumuron (TFM)-in human carcinoma cells (HCT116). Our methodological approach consists of the cytotoxicity assay starting with the cell viability test, the ROS generation, the malondialdehyde (MDA) production, the DNA fragmentation, and the measurement of some antioxidant enzymes activities such as catalase (CAT) and superoxide dismutase (SOD). Also, we measured the mitochondrial transmembrane potential. The outcome of the current study showed clearly that after 2 h of HCT 116 cell pretreatment with FEO, there were increase in cell viability, reduction in ROS generation, and modulation in CAT and SOD activities induced by TFM. In the same manner, significant decreases in MDA levels were found. Mainly, the results indicated a perceptible decrease in DNA damages and a significant reduction in the mitochondrial membrane potential loss. Our work demonstrates that FEO can be an important protector against toxic effects induced by TFM in HCT 116 cells.


Assuntos
Antioxidantes/química , Benzamidas/química , Catalase/química , Neoplasias do Colo/fisiopatologia , Foeniculum , Inseticidas , Óleos Voláteis , Superóxido Dismutase/química , Benzamidas/toxicidade , Catalase/metabolismo , Neoplasias do Colo/química , Dano ao DNA , Humanos , Estresse Oxidativo
13.
Ann Gastroenterol ; 31(6): 685-691, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-30386118

RESUMO

BACKGROUND: The use of herbal products to treat irritable bowel syndrome (IBS), a disease that frequently affects the quality of life (QoL), is still under evaluation. This open pilot study assessed the efficacy of bio-optimized extracts of turmeric and essential fennel oil (Enterofytol®) in IBS patients. METHODS: A total of 211 patients (14% diarrhea-predominant, IBS-D; 24% constipation-predominant, IBS-C; 62% mixed, IBS-M) were enrolled by general practitioners and completed questionnaires measuring symptom severity and QoL before and after Enterofytol®, two capsules b.i.d. for one month, followed by two capsules q.d. for another month. RESULTS: IBS severity index and QoL were inversely related. A significant reduction in the severity index and an improvement in QoL were evident following treatment in all IBS subgroups. IBS-D patients showed the worst clinical picture at entry, with the highest IBS severity index and the lowest QoL score, compared with IBS-C and IBS-M subtypes. IBS-D patients, however, also showed the most pronounced response to therapy, considering both scores. The improvement in the IBS severity index was independent of age and sex. CONCLUSIONS: Results from this "real-life" study show that the combination of turmeric and essential fennel oil over two months improves both symptoms and QoL in IBS patients, irrespectively of age, sex, initial severity of symptoms and IBS-subtypes, suggesting a potential role for the natural treatment of IBS.

14.
Mater Sci Eng C Mater Biol Appl ; 92: 245-253, 2018 Nov 01.
Artigo em Inglês | MEDLINE | ID: mdl-30184748

RESUMO

Psoralens are lipophilic molecules used to treat skin diseases such as vitiligo and psoriasis, among them, 8-Methoxypsoralen (8-MOP) is the most used to topical skin application. Topical treatment with psoralens can be limited due to insufficient drug penetration into the skin layers. Nanoemulsions have attracted much attention due to their as dermal delivery systems for lipophilic drugs such as 8-MOP. However, nanoemulsions feature low viscosity, which might be unsuitable for topical application. In this work, we produced hydrogel-thickened nanoemulsions using chitosan with different molecular weight as thickening polymer to overcome the low viscosity attributed to nanoemulsions. The aim of this study is to characterize oil-in-water (o/w) nanoemulsions and hydrogel-thickened nanoemulsions based on two different essential oils to in vitro controlled release of 8-MOP. In a previous work, we have reported production, stability and in vitro transdermal release of such formulations. Here, 8-MOP loaded nanoemulsions and hydrogel-thickened nanoemulsions were characterized regarding their morphology, rheological behavior, and in vitro drug release kinetics. Hydrogel-based systems presented a gel-like rheological behavior, being classified as weak gels. 8-MOP in vitro release from hydrogels-based formulations using clove essential oil showed strong dependency chitosan molecular weight. On the other hand, hydrogel-thickened nanoemulsions using sweet fennel oil as inner phase, showed an unexpected pH-dependent behavior not fully understood at the moment. These results need further investigation, nevertheless hydrogel-thickened nanoemulsions revealed to be interesting and complex dermal delivery systems for poorly soluble drugs.


Assuntos
Liberação Controlada de Fármacos , Emulsões/química , Hidrogéis/química , Metoxaleno/administração & dosagem , Nanopartículas/química , Administração Cutânea , Óleo de Cravo , Cinética
15.
Burns ; 43(7): 1544-1551, 2017 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-28917968

RESUMO

An increase in the number of staphylococcal infections and carriers among medical staff has forced us to seek more and more effective antibacterial agents. Bacteria from the Staphylococcus genus possessing different mechanisms of resistance are the cause of nosocomial infections. The objective of our investigations was susceptibility of S. aureus strains isolated from nasal vestibule of medical students to fennel essential oil. The GC-MS analysis of fennel essential oil revealed eleven constituents among which a majority of trans-anethole (80%) was found. The D-tests showed iMLSB (80%), cMLSB and MSB (10%) resistant phenotypes of S. aureus. The S. aureus isolates were intermediate to mupirocin (45%). Fennel essential oil increased the inhibition zone around cefoxitin, mupirocin, co-trimoxazole and ciprofloxacin with statistical significance. Our research showed that the fennel essential oil in combination with mupirocin may be considered as a natural alternative in eradication of S. aureus with iMLSB, cMLSB, MSB resistant phenotypes and is able to decrease the growth rate of antibiotic resistance.


Assuntos
Antibacterianos/farmacologia , Foeniculum , Óleos Voláteis/farmacologia , Staphylococcus aureus/efeitos dos fármacos , Portador Sadio/microbiologia , Ciprofloxacina/farmacologia , Testes de Sensibilidade a Antimicrobianos por Disco-Difusão , Quimioterapia Combinada , Cromatografia Gasosa-Espectrometria de Massas , Humanos , Técnicas In Vitro , Testes de Sensibilidade Microbiana , Mupirocina/farmacologia , Óleos Voláteis/química , Infecções Estafilocócicas/microbiologia , Combinação Trimetoprima e Sulfametoxazol/farmacologia
16.
Artigo em Inglês | MEDLINE | ID: mdl-28892803

RESUMO

The key odorants and the aroma profile of six fennel essential oils from different regions were investigated by using gas chromatography-olfactometry (GC-O), gas chromatography-mass spectrometry (GC-MS) and sensory evaluation. A total of 30 volatile compounds were determined by GC-O with aroma extract dilution analysis (AEDA) and the odor activity values (OAV) of them were calculated. Among these compounds, α-pinene, α-phellandrene, limonene, α-cubebene, ß-caryophyllene, estragole, α-humulene, trans-anethole, δ-cadinene and p-anisaldehyde contributed greatly to the aroma of fennel essential oil due to their high flavor dilution (FD) factors and high OAVs. The aroma of fennel essential oils was described by 7 sensory terms as spicy, woody, grassy, floral, musty, sweet and green, and was correlated to the key odorants by partial least squares regression (PLSR). It was showed that spicy, woody, grassy, musty and green attributes were covaried well with aroma compounds. In addition, hierarchical cluster analysis (HCA) was used to find out the similarities among different samples and the result indicated that three main groups were identified.


Assuntos
Foeniculum/química , Cromatografia Gasosa-Espectrometria de Massas/métodos , Odorantes/análise , Óleos Voláteis/química , Análise por Conglomerados , Análise dos Mínimos Quadrados , Modelos Lineares , Reprodutibilidade dos Testes , Sensibilidade e Especificidade
17.
Eur J Pharm Biopharm ; 116: 38-50, 2017 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-27867112

RESUMO

Nanoemulsions (NE) have attracted much attention due to their as dermal delivery systems for lipophilic drugs such as psoralens. However, NE feature low viscosity which might be unsuitable for topical application. In this work, we produced hydrogel-thickened nanoemulsions (HTN) using chitosan as thickening polymer to overcome the low viscosity attributed to NE. The aim of this study is to develop and characterize oil-in-water (o/w) HTN based on sweet fennel and clove essential oil to transdermal delivery of 8-methoxsalen (8-MOP). NE components (oil, surfactant) were selected on the basis of solubility and droplet size and processed in a high-pressure homogenizer (HPH). Drug loaded NE and HTN were characterized for particle size, stability under storage and centrifugation, rheological behavior, transdermal permeation and skin accumulation. Transdermal permeation of 8-MOP from HTN was determined by using Franz diffusion cell. Transdermal permeation from HTN using clove essential oil showed strong dependency chitosan molecular weight. On the other hand, HTN using sweet fennel oil showed an unexpected pH-dependent behavior not fully understood at the moment. These results need further investigation, nevertheless HTN revealed to be interesting and complex dermal delivery systems for poorly soluble drugs.


Assuntos
Emulsões/química , Ficusina/administração & dosagem , Ficusina/química , Hidrogel de Polietilenoglicol-Dimetacrilato/química , Nanopartículas/química , Óleos Voláteis/química , Administração Cutânea , Animais , Sistemas de Liberação de Medicamentos/métodos , Orelha , Emulsões/administração & dosagem , Hidrogel de Polietilenoglicol-Dimetacrilato/administração & dosagem , Nanopartículas/administração & dosagem , Óleos Voláteis/administração & dosagem , Tamanho da Partícula , Permeabilidade/efeitos dos fármacos , Pele/metabolismo , Absorção Cutânea/efeitos dos fármacos , Solubilidade , Tensoativos/química , Suínos , Viscosidade/efeitos dos fármacos
18.
Environ Toxicol Pharmacol ; 39(3): 1177-88, 2015 May.
Artigo em Inglês | MEDLINE | ID: mdl-25935540

RESUMO

Emamectin benzoate (EB) is an avermectin insecticide used extensively in pest control on vegetable and field crops. Few studies have been done for evaluating adverse effects of EB. In the current study, we evaluated the toxic effects of EB on male rats and the possible ameliorative role of fennel essential oil (FEO). Thirty two male rats were randomly divided into 4 equal groups. All groups were treated orally with distilled water (control group), 0.5mlFEOkg(-1) BW (FEO group), 2.5mgEBkg(-1) BW (EB group), and 0.5mlFEOkg(-1) BW+2.5mgEBkg(-1) BW (FEO+EB group) for 28 days. The obtained results showed that EB treatment resulted in a significant decrease in body weight, body weight gain, RBC count, Hb concentration, % PCV, MCV and MCHC. Moreover, EB significantly decreased total leukocyte, lymphocyte, monocyte and platelet count but significantly increased granulocyte count. EB markedly decreased total protein, albumin, globulin, IgG and IgM concentrations with a significant increase in TNF-α secretion. EB had a negative impact on the liver as it significantly increased ALT, ALP, and MDA, while decreasing SOD activity. Regarding to the histopathological examination, EB treatment induced coagulative necrosis and blood vessels congestion of the liver in treated rats. Furthermore, it resulted in depletion and necrosis of the white pulp of the spleen in treated rats. The co-administration of FEO with EB, however, improved the majority of parameters studied, suggesting that FEO is an important substance in decreasing toxic effects of EB.


Assuntos
Doença Hepática Induzida por Substâncias e Drogas/prevenção & controle , Foeniculum/química , Ivermectina/análogos & derivados , Óleos Voláteis/administração & dosagem , Administração Oral , Animais , Biomarcadores/análise , Peso Corporal/efeitos dos fármacos , Ivermectina/administração & dosagem , Ivermectina/toxicidade , Masculino , Óleos Voláteis/farmacologia , Ratos , Testes de Toxicidade Subcrônica , Aumento de Peso/efeitos dos fármacos
19.
J Food Sci ; 79(2): E189-94, 2014 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-24410449

RESUMO

Edible coatings were produced using cassava starch (2% and 3% w/v) containing cinnamon bark (0.05% to 0.30% v/v) or fennel (0.05% to 0.30% v/v) essential oils. Edible cassava starch coating at 2% and 3% (w/v) containing or not containing 0.30% (v/v) of each essential oils conferred increased in water vapor resistance and decreased in the respiration rates of coated apple slices when compared with uncoated fruit. Cassava starch coatings (2% w/v) added 0.10% or 0.30% (v/v) fennel or cinnamon bark essential oils showed antioxidant capacity, and the addition of 0.30% (v/v) of each essential oil demonstrated antimicrobial properties. The coating containing cinnamon bark essential oil showed a significant antioxidant capacity, comparing to fennel essential oil. Antimicrobial tests showed that the addition of 0.30% (v/v) cinnamon bark essential oil to the edible coating inhibited the growth of Staphylococcus aureus and Salmonella choleraesuis, and 0.30% fennel essential oil inhibited just S. aureus. Treatment with 2% (w/v) of cassava starch containing 0.30% (v/v) of the cinnamon bark essential oil showed barrier properties, an antioxidant capacity and microbial inhibition.


Assuntos
Fast Foods/análise , Conservação de Alimentos , Frutas/química , Malus/química , Manihot/química , Óleos Voláteis/química , Amido/química , Anti-Infecciosos/química , Anti-Infecciosos/metabolismo , Antioxidantes/química , Antioxidantes/metabolismo , Dióxido de Carbono/metabolismo , Fast Foods/microbiologia , Manipulação de Alimentos , Embalagem de Alimentos , Frutas/metabolismo , Frutas/microbiologia , Glicerol/química , Glicerol/metabolismo , Malus/metabolismo , Malus/microbiologia , Viabilidade Microbiana , Óleos Voláteis/metabolismo , Permeabilidade , Salmonella enterica/crescimento & desenvolvimento , Salmonella enterica/metabolismo , Staphylococcus aureus/crescimento & desenvolvimento , Staphylococcus aureus/metabolismo , Amido/metabolismo , Vapor , Propriedades de Superfície
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