RESUMEN
Cardio-pulmonary parasites, such as Angiostrongylus vasorum, Crenosoma vulpis, and Eucoleus aerophilus, pose a significant concern on account of pulmonary and cardiac problems they induce in dogs. While the red fox is known to be a key reservoir host for A. vasorum and may also play a role in transmitting C. vulpis and E. aerophilus, there has been no recent research on these parasites in foxes from Sardinia, with the most current studies dating back to 1986. A survey was conducted on red foxes in Sardinia, where a total of 51 foxes were collected, necropsied, and examined for adult worms in their hearts and lungs. The worms were identified using morphometric analysis and molecular methods. The results showed a 54.9% overall prevalence at dissection: 45.1% of the foxes were positive for E. aerophilus, 17.6% for C. vulpis, and 13.7% for A. vasorum. The molecular analyses validated the morphological characterization. In comparison to previous research, which found 13 out of 85 foxes to be positive for A. vasorum with a prevalence rate of 15.3% and 1 for E. aerophilus with a prevalence of 1.2%, this study showed an increased prevalence of E. aerophilus and C. vulpis, and a decrease in the prevalence of A. vasorum. These results indicate that the red foxes in Sardinia represent a reservoir host for cardio-pulmonary nematodes and it should be considered in the differential diagnosis of respiratory distress syndrome in dogs.
Asunto(s)
Zorros , Corazón , Pulmón , Metastrongyloidea , Infecciones por Nematodos , Animales , Perros , Zorros/parasitología , Corazón/parasitología , Italia/epidemiología , Infecciones por Nematodos/epidemiología , Infecciones por Nematodos/parasitología , Infecciones por Nematodos/transmisión , Infecciones por Nematodos/veterinaria , Pulmón/parasitología , Prevalencia , Reservorios de Enfermedades/parasitología , Reservorios de Enfermedades/veterinaria , Masculino , FemeninoRESUMEN
Grape seed of Obeidi, a white Lebanese autochthonous variety, was previously tested in different studies as a valuable source of bioactive molecules such as polyphenols, oils, and proteins by means of extraction procedures for the development of cosmetic and therapeutic products. However, an un-valorized, exhausted grape seed residue remains as "secondary waste" after the extraction processes. In this study, the exhausted seeds have been further exploited to produce cosmetic scrubs capable of releasing antioxidant molecules during the exfoliation process, in accordance with the principles of the circular economy and going toward a zero-waste process. The deep characterization of the exhausted seeds confirmed the presence of antioxidant phenolic molecules including gallic acid, catechins and protocatechuic acid (0.13, 0.126, and 0.089 mg/g of dry matter DM), and a high phenolic content (11.85 mg gallic acid equivalents (GAE)/g of dry matter (DM)). Moreover, these residues were shown to possess a sandy texture (Hausner ratio (HR): 1.154, Carr index (CI): 0.133, and angle of repose: 31.62 (°) degrees), similar to commercial natural exfoliants. In this respect, exhausted Obeidi grape seed residues were incorporated at increasing concentrations (0.5, 1, 1.5, and 2% w/w) in a cosmetic scrub, and stored for 5 weeks at 4, 25, and 50 °C for stability testing. All tested scrub formulations exhibited good spreadability with a spread diameter of 3.6-4.7 cm and excellent physical stability, as no phase separation or color change were observed after four cycles of heat shock at 4 and 50 °C. Finally, an in vivo skin irritation test showed that the scrub enriched with 1.5% of exhausted Obeidi grape seed residues was the most promising formulation, as it possessed a high amount of phenolic molecules (0.042 ± 0.001 mg GAE/mL of scrub) and good stability and could be safely applied to the skin with no irritation phenomena. Overall results underlined that exhausted grape seed residues can be transformed into promising systems for both physical and chemical exfoliation, thus confirming the importance of the effective exploitation of agro-industrial by-products for the development of high value cosmeceutics towards a more sustainable and zero-waste approach.
Asunto(s)
Antioxidantes , Vitis , Antioxidantes/química , Vitis/química , Polifenoles/química , Fenoles/química , Semillas/química , Ácido Gálico/análisisRESUMEN
Culture of plant cells or tissues is a scalable, sustainable, and environmentally friendly approach to obtain extracts and secondary metabolites of uniform quality that can be continuously supplied in controlled conditions, independent of geographical and seasonal variations, environmental factors, and negative biological influences. In addition, tissues and cells can be extracted/obtained from the by-products of other industrial cultivations such as that of Lavandula angustifolia Miller (L. angustifolia), which is largely cultivated for the collection of flowers. Given that, an extract rich in rosmarinic acid was biotechnologically produced starting from cell suspension of L. angustifolia, which was then loaded in hyalurosomes, special phospholipid vesicles enriched with sodium hyaluronate, which in turn are capable of both immobilizing and stabilizing the system. These vesicles have demonstrated to be good candidates for skin delivery as their high viscosity favors their residence at the application site, thus promoting their interaction with the skin components. The main physico-chemical and technological characteristics of vesicles (i.e., mean diameter, polydispersity index, zeta potential and entrapment efficiency of extract in vesicles) were measured along with their biological properties in vitro: biocompatibility against fibroblasts and ability to protect the cells from oxidative stress induced by hydrogen peroxide. Overall, preliminary results disclosed the promising properties of obtained formulations to be used for the treatment of skin diseases associated with oxidative stress and inflammation.
Asunto(s)
Lavandula , Antioxidantes/farmacología , Cinamatos , Depsidos/farmacología , Lavandula/química , Extractos Vegetales/química , Extractos Vegetales/farmacología , Ácido RosmarínicoRESUMEN
The Brazilian berry scientifically known as jabuticaba is a fruit covered by a dark purple peel that is still rich in bioactives, especially polyphenols. Considering that, this work was aimed at obtaining an extract from the peel of jabuticaba fruits, identifying its main components, loading it in phospholipid vesicles specifically tailored for skin delivery and evaluating their biological efficacy. The extract was obtained by pressurized hot water extraction (PHWE), which is considered an easy and low dissipative method, and it was rich in polyphenolic compounds, especially flavonoids (ortho-diphenols and condensed tannins), anthocyanins (cyanidin 3-O-glucoside and delphinidin 3-O-glucoside) and gallic acid, which were responsible for the high antioxidant activity detected using different colorimetric methods (DPPH, FRAP, CUPRAC and metal chelation). To improve the stability and extract effectiveness, it was incorporated into ultradeformable phospholipid vesicles (transfersomes) that were modified by adding two different polymers (hydroxyethyl cellulose and sodium hyaluronate), thus obtaining HEcellulose-transfersomes and hyaluronan-transfersomes. Transfersomes without polymers were the smallest, as the addition of the polymer led to the formation of larger vesicles that were more stable in storage. The incorporation of the extract in the vesicles promoted their beneficial activities as they were capable, to a greater extent than the solution used as reference, of counteracting the toxic effect of hydrogen peroxide and even of speeding up the healing of a wound performed in a cell monolayer, especially when vesicles were enriched with polymers. Given that, polymer enriched vesicles may represent a good strategy to produce cosmetical and cosmeceutical products with beneficial properties for skin.
Asunto(s)
Antocianinas/farmacología , Antioxidantes/farmacología , Taninos Hidrolizables/farmacología , Queratinocitos/efectos de los fármacos , Queratinocitos/metabolismo , Estrés Oxidativo/efectos de los fármacos , Fosfolípidos , Extractos Vegetales/farmacología , Antocianinas/administración & dosificación , Antocianinas/química , Antioxidantes/administración & dosificación , Antioxidantes/química , Materiales Biocompatibles/química , Frutas/química , Humanos , Peróxido de Hidrógeno/química , Peróxido de Hidrógeno/farmacología , Taninos Hidrolizables/administración & dosificación , Taninos Hidrolizables/química , Liposomas , Fosfolípidos/química , Extractos Vegetales/administración & dosificación , Extractos Vegetales/químicaRESUMEN
The extract of Cardiospermum halicacabum L. (C. halicacabum) obtained from flower, leaf and vine was loaded into modified phospholipid vesicles aiming at obtaining sprayable, biocompatible and effective nasal spray formulations for the treatment of nasopharyngeal diseases. Penetration enhancer-containing vesicles (PEVs) and hyalurosomes were formulated, and stabilized by adding a commercial gelatin from fish (20 mg/mL) or chondroitin sulfate from catshark cartilages (Scyliorhinus canicula, 20 mg/mL). Cryo-TEM images confirmed the formation of spherical vesicles, while photon correlation spectroscopy analysis disclosed the formation of small and negatively-charged vesicles. PEVs were the smaller vesicles (~100 nm) along with gelatin-hyalurosomes (~120 nm), while chondroitin-PEVs and chondroitin-hyalurosomes were larger (~160 nm). Dispersions prepared with chondroitin sulfate were more homogeneous, as the polydispersity index was ~0.15. The in vitro analysis of the droplet size distribution, average velocity module and spray cone angle suggested a good spray-ability and deposition of formulations in the nasal cavity, as the mean diameter of the droplets was in the range recommended by the Food and Drug Administration for nasal targets. The spray plume analysis confirmed the ability of PEVs, gelatin-PEVs, hyalurosomes and gelatin-hyalurosomes to be atomized in fine droplets homogenously distributed in a full cone plume, with an angle ranging from 25 to 30°. Moreover, vesicles were highly biocompatible and capable of protecting the epithelial cells against oxidative damage, thus preventing the inflammatory state.
Asunto(s)
Sulfatos de Condroitina , Gelatina , Liposomas , Rociadores Nasales , Fosfolípidos , Extractos Vegetales/administración & dosificación , Sapindaceae/química , Aerosoles , Antioxidantes/administración & dosificación , Antioxidantes/química , Materiales Biocompatibles/química , Fenómenos Químicos , Composición de Medicamentos , Humanos , Queratinocitos/efectos de los fármacos , Estrés Oxidativo/efectos de los fármacos , Tamaño de la Partícula , Extractos Vegetales/químicaRESUMEN
Gellan nanohydrogel and phospholipid vesicles were combined to incorporate baicalin in new self-assembling core-shell gellan-transfersomes obtained by an easy, scalable method. The vesicles were small in size (~107 nm) and monodispersed (P.I. ≤ 0.24), forming a viscous system (~24 mPa/s) as compared to transfersomes (~1.6 mPa/s), as confirmed by rheological studies. Gellan was anchored to the bilayer domains through cholesterol, and the polymer chains were distributed onto the outer surface of the bilayer, thus forming a core-shell structure, as suggested by SAXS analyses. The optimal carrier ability of core-shell gellan-transfersomes was established by the high deposition of baicalin in the skin (~11% in the whole skin), especially in the deeper tissue (~8% in the dermis). Moreover, their ability to improve baicalin efficacy in anti-inflammatory and skin repair tests was confirmed in vivo in mice, providing the complete skin restoration and inhibiting all the studied inflammatory markers.
Asunto(s)
Flavonoides/administración & dosificación , Inflamación/tratamiento farmacológico , Liposomas/química , Nanopartículas/química , Polisacáridos Bacterianos/química , Piel/efectos de los fármacos , Cicatrización de Heridas/efectos de los fármacos , Administración Cutánea , Animales , Animales Recién Nacidos , Antiinflamatorios no Esteroideos/administración & dosificación , Antiinflamatorios no Esteroideos/química , Sistemas de Liberación de Medicamentos , Femenino , Flavonoides/química , Ratones , Piel/lesiones , Absorción Cutánea , PorcinosRESUMEN
Curcumin is an antimalarial compound easy to obtain and inexpensive, having shown little toxicity across a diverse population. However, the clinical use of this interesting polyphenol has been hampered by its poor oral absorption, extremely low aqueous solubility and rapid metabolism. In this study, we have used the anionic copolymer Eudragit® S100 to assemble liposomes incorporating curcumin and containing either hyaluronan (Eudragit-hyaluronan liposomes) or the water-soluble dextrin Nutriose® FM06 (Eudragit-nutriosomes). Upon oral administration of the rehydrated freeze-dried nanosystems administered at 25/75 mg curcumin·kg−1·day−1, only Eudragit-nutriosomes improved the in vivo antimalarial activity of curcumin in a dose-dependent manner, by enhancing the survival of all Plasmodium yoelii-infected mice up to 11/11 days, as compared to 6/7 days upon administration of an equal dose of the free compound. On the other hand, animals treated with curcumin incorporated in Eudragit-hyaluronan liposomes did not live longer than the controls, a result consistent with the lower stability of this formulation after reconstitution. Polymer-lipid nanovesicles hold promise for their development into systems for the oral delivery of curcumin-based antimalarial therapies.
Asunto(s)
Curcumina/administración & dosificación , Sistemas de Liberación de Medicamentos , Liposomas/administración & dosificación , Malaria/tratamiento farmacológico , Administración Oral , Animales , Antimaláricos/administración & dosificación , Antimaláricos/química , Curcumina/química , Humanos , Liposomas/química , Malaria/parasitología , Ratones , Nanopartículas/administración & dosificación , Nanopartículas/química , Plasmodium yoelii/efectos de los fármacos , Plasmodium yoelii/patogenicidadRESUMEN
Resveratrol and gallic acid, a lipophilic and a hydrophilic phenol, were co-loaded in innovative, biocompatible nanovesicles conceived for ensuring the protection of the skin from oxidative- and inflammatory-related affections. The basic vesicles, liposomes and glycerosomes, were produced by a simple, one-step method involving the dispersion of phospholipid and phenols in water or water/glycerol blend, respectively. Liposomes and glycerosomes were modified by the addition of poloxamer, a stabilizer and viscosity enhancer, thus obtaining viscous or semisolid dispersions of structured vesicles. The vesicles were spherical, unilamellar and small in size (~70 nm in diameter). The superior ability of the poloxamer-structured vesicles to promote the accumulation of both phenols in the skin was demonstrated, as well as their low toxicity and great ability to protect fibroblasts from chemically-induced oxidative damage. The in vivo administration of the vesicular phenols on TPA (phorbol ester)-exposed skin led to a significant reduction of oedema and leukocyte infiltration.
Asunto(s)
Antiinflamatorios no Esteroideos/administración & dosificación , Ácido Gálico/administración & dosificación , Liposomas/química , Poloxámero/química , Piel/efectos de los fármacos , Estilbenos/administración & dosificación , Animales , Antiinflamatorios no Esteroideos/farmacocinética , Antiinflamatorios no Esteroideos/farmacología , Antiinflamatorios no Esteroideos/uso terapéutico , Línea Celular , Supervivencia Celular/efectos de los fármacos , Edema/tratamiento farmacológico , Edema/patología , Femenino , Fibroblastos/citología , Fibroblastos/efectos de los fármacos , Fibroblastos/patología , Ácido Gálico/farmacocinética , Ácido Gálico/farmacología , Ácido Gálico/uso terapéutico , Liposomas/ultraestructura , Ratones , Estrés Oxidativo/efectos de los fármacos , Resveratrol , Piel/patología , Absorción Cutánea , Estilbenos/farmacocinética , Estilbenos/farmacología , Estilbenos/uso terapéutico , PorcinosRESUMEN
The phycobiliprotein phycocyanin, extracted from Klamath algae, possesses important biological properties but it is characterized by a low bioavailability due to its high molecular weight. To overcome the bioavailability problems, phycocyanin was successfully encapsulated, using an environmentally-friendly method, into hyalurosomes, a new kind of phospholipid vesicles immobilised with hyaluronan sodium salt by the simple addition of drug/sodium hyaluronate water dispersion to phospholipids. Liposomes were used as a comparison. Vesicles were small in size and homogeneously dispersed, being the mean size always smaller than 150 nm and PI never higher than 0.31. Liposomes were unilamellar and spherical, the addition of the polymer slightly modify the vesicular shape which remain spherical, while the addition of PEG improve the lamellarity of vesicles being multilamellar vesicles. In all cases phycocyanin was encapsulated in good amount especially using hyalurosomes and PEG hyalurosomes (65 and 61% respectively). In vitro penetration studies suggested that hyalurosomes favoured the phycocyanin deposition in the deeper skin layers probably thanks to their peculiar hyaluronan-phospholipid structure. Moreover, hyalurosomes were highly biocompatible and improved phycocyanin antioxidant activity on stressed human keratinocytes respect to the drug solution.
Asunto(s)
Estrés Oxidativo , Ficocianina/química , Piel , Administración Tópica , Animales , Células Cultivadas , Humanos , Ácido Hialurónico , Queratinocitos/efectos de los fármacos , Liposomas , Polietilenglicoles , PorcinosRESUMEN
In this study, the effects of ethanol and/or diclofenac on vesicle bilayer structure have been studied. Liposomes with hydrogenated soy phosphatidylcholine, cholesterol and two different concentrations of diclofenac sodium (5 and 10 mg/ml) were obtained. In addition, ethanol was mixed in the water phase at different concentrations (5, 10 and 20 % v/v) to obtain ethosomes. To characterize vesicles, rehological analysis were carried out to investigate the intervesicle interactions, while bilayer structure was evaluated by small- and wide-angle X-ray scattering. Finally, the ethanol and/or diclofenac concentration-dependent ability to improve diclofenac skin delivery was evaluated in vitro. The addition of 20 % ethanol and/or diclofenac led to solid-like ethosome dispersion due to the formation of a new intervesicle structure, as previously found in transcutol containing vesicle dispersions. However, when using 5-10 % of ethanol the induction to form vesicle interconnections was less evident but the simultaneous presence of the drug at the highest concentration facilitated this phenomenon. Ethosomes containing the highest amount of both, drug (10 mg/ml) and ethanol (20 % v/v), improved the drug deposition in the skin strata and in the receptor fluid up to 1.5-fold, relative to liposomes. Moreover this solid-like formulation can easily overcome drawbacks of traditional liquid liposome formulations which undergo a substantial loss at the application site.
Asunto(s)
Diclofenaco/farmacología , Etanol/farmacología , Hidrógeno/química , Membrana Dobles de Lípidos/química , Fosfatidilcolinas/química , Piel/metabolismo , Animales , Diclofenaco/administración & dosificación , Etanol/administración & dosificación , Técnicas In Vitro , PorcinosRESUMEN
PURPOSE: To develop quercetin-loaded phospholipid vesicles, namely liposomes and PEVs (Penetration Enhancer-containing Vesicles), and to investigate their efficacy on TPA-induced skin inflammation. METHODS: Vesicles were made from a mixture of phospholipids, quercetin and polyethylene glycol 400 (PEG), specifically added to increase drug solubility and penetration through the skin. Vesicle morphology and self-assembly were probed by Cryo-Transmission Electron Microscopy and Small/Wide Angle X-ray Scattering, as well as the main physico-chemical features by Light Scattering. The anti-inflammatory efficacy of quercetin nanovesicles was assessed in vivo on TPA-treated mice dorsal skin by the determination of two biomarkers: oedema formation and myeloperoxidase activity. The uptake of vesicles by 3T3 fibroblasts was also evaluated. RESULTS: Small spherical vesicles were produced. Their size and lamellarity was strongly influenced by the PEG content (0%, 5%, 10% v/v). The administration of vesicular quercetin on TPA-inflamed skin resulted in an amelioration of the tissue damage, with a noticeable attenuation of oedema and leukocyte infiltration, especially using 5% PEG-PEVs, as also confirmed by confocal microscopy. In vitro studies disclosed a massive uptake and diffusion of PEVs in dermal fibroblasts. CONCLUSIONS: The proposed approach based on quercetin vesicular formulations may be of value in the treatment of inflammatory skin disorders.
Asunto(s)
Antiinflamatorios/administración & dosificación , Portadores de Fármacos/administración & dosificación , Nanopartículas/administración & dosificación , Quercetina/administración & dosificación , Absorción Cutánea/efectos de los fármacos , Células 3T3 , Administración Cutánea , Animales , Portadores de Fármacos/química , Evaluación Preclínica de Medicamentos/métodos , Femenino , Liposomas , Ratones , Quercetina/química , Absorción Cutánea/fisiología , Difracción de Rayos XRESUMEN
CONTEXT: Quercetin (QUE) is a flavonoid with antioxidant/anti-inflammatory properties, poorly absorbed when orally administered. OBJECTIVES: To prepare chitosan/xanthan gum microparticles to increase QUE oral bioavailability and optimize its release in the colon. MATERIALS AND METHODS: Chitosan/xanthan gum hydrogel embedding QUE was spray-dried to obtain microparticles characterized by size, scanning electron microscopy, differential scanning calorimetry and X-ray diffraction. Microparticles were compressed into tablets, coated with Eudragit® to further prevent degradation in acidic pH. The swelling degree and QUE release in simulated gastric and intestinal pH were investigated. RESULTS: Microparticles were smooth and spherical, around 5 µm, with successful QUE loading. Microparticle tablets provided resistance to acidic conditions, allowing complete drug release in alkaline pH, mimicking colonic environment. The release was controlled by non-Fickian diffusion of the dissolved drug out of the swollen polymeric tablet. DISCUSSION AND CONCLUSION: Microparticle tablets represent a promising dosage form for QUE delivery to the colon in the oral therapy of inflammatory-based disorders.
Asunto(s)
Antioxidantes , Quitosano , Colon , Polisacáridos Bacterianos , Quercetina , Administración Oral , Antioxidantes/química , Antioxidantes/farmacocinética , Quitosano/química , Quitosano/farmacocinética , Preparaciones de Acción Retardada , Concentración de Iones de Hidrógeno , Polisacáridos Bacterianos/química , Polisacáridos Bacterianos/farmacocinética , Quercetina/química , Quercetina/farmacocinética , ComprimidosRESUMEN
Toxoplasma gondii is a zoonotic parasite able of infecting all warm-blooded animals. Toxoplasmosis is one of the major foodborne diseases globally. The consumption of wild boar (Sus scrofa) meat from recreational hunting has been linked to outbreaks of human toxoplasmosis. The island of Sardinia (Italy) contains a large wild boar population, thus providing an opportunity to assess the distribution of Toxoplasma in this species and the associated risks of transmission to humans. A total of 562 wild boars were screened: heart and meat juice samples were tested for T. gondii DNA via nested-PCR and IgG anti-Toxoplasma by commercial ELISA. Anti-Toxoplasma IgG were detected in 24.6% (138/562) of animals, while 37.2% (209/562) of the heart samples were PCR positive. The prevalence of T. gondii antibodies and DNA highlights the potential role of wild boar as an important reservoir for this parasite. The study suggests that wild boar could play a significant role in spreading the parasite to humans. As wild boar numbers are increasing throughout their range, their potential role in transmitting toxoplasmosis should be communicated to stakeholders, and the impact of different population control methods on disease transmission should be thoroughly assessed to mitigate potential threats effectively.
RESUMEN
The winemaking process generates an annual global production of about 10 million tons of waste consisting of stalks, skin, and seeds. The possible reutilization of wine pomace is strictly linked to its chemical composition. In this preliminary study, three different Sardinian white grapes (Malvasia, Vermentino and Nasco) grown in the same area were evaluated through a whole wine production chain. To reduce environmental impact, all the grapes were treated following the integrated production practice (IPP) strategies. The adopted agronomic methods and the main physico-chemical parameters of the fresh fruits and musts were evaluated. A fully qualitative and quantitative characterization of the phenolic fraction of the pomace extracts was performed by HPLC-DAD after a post-winemaking process. Water and ethanol were utilized as green solvents in the extraction process. Additionally, the entire pomace post-winemaking process was carried out within the winery facilities to reduce energy loss and road transportation. The findings demonstrated that large amounts of beneficial polyphenols are present in pomace extracts, and that the type of grape used, agronomic practices, and winemaking method all influence the quantity and quality of the extracts. The polyphenol concentrations in the Vermentino (28,391.5 ± 7.0 mg/kg) and Malvasia pomace (11,316.3 ± 6.5 mg/kg) were found to be the highest and lowest, respectively.
RESUMEN
Inflammatory skin disorders are the fourth leading cause of chronic non-fatal conditions, which have a serious impact on the patient quality of life. Due to their treatment with conventional corticosteroids, which often result in poor therapeutic efficacy, relapses and systemic side effects from prolonged therapy, these diseases represent a global burden that negatively impacts the global economy. To avoid these problems and optimize corticosteroid benefits, beclomethasone was loaded into liposome formulations specifically tailored for skin delivery. These formulations were enhanced with mucin (0.1 and 0.5â¯% w/v) to further ensure prolonged formulation permanence at the site of application. The addition of 0.5â¯% w/v mucin resulted in the formation of small unilamellar vesicles and multicompartment vesicles. Liposomes and 1mucin-liposomes were smaller (â¼48 and â¼61â¯nm, respectively) and more monodispersed (PI â¼ 0.14 and â¼ 0.17, respectively) than 5mucin-liposomes, which were larger (â¼137â¯nm), slightly polydispersed (PI â¼ 0.23), and less stable during storage (4 months in the dark at 25 °C). Liposomes were negatively charged (â¼ -79â¯mV) irrespective of their composition, and capable of incorporating high amount of beclomethasone (â¼ 80â¯%). In vitro studies on skin fibroblasts and keratinocytes confirmed the high biocompatibility of all formulations (viability ≥ 95â¯%). However, the use of mucin-liposomes resulted in higher efficacy against nitric oxide production and free radical damage. Finally, topical applications using 12-O-tetradecanoylphorbol-13-acetate-injured skin in vivo experiments showed that only the mucin-enriched formulations could restore healthy conditions within 4 days, underscoring promise as a treatment for skin disorders.
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Beclometasona , Liposomas , Mucinas , Enfermedades de la Piel , Beclometasona/administración & dosificación , Beclometasona/farmacología , Beclometasona/química , Mucinas/metabolismo , Humanos , Animales , Enfermedades de la Piel/tratamiento farmacológico , Piel/efectos de los fármacos , Piel/metabolismo , Ratones , Administración CutáneaRESUMEN
Recently, we carried out a research on new liposomal systems prepared by using in their composition a few penetration enhancers which differ for chemical structure and physicochemical properties. The penetration enhancer-containing vesicles (PEVs) were prepared by using soy lecithin and different amounts of three penetration enhancers, 2-(2-ethoxyethoxy) ethanol (Transcutol(®)), capryl-caproyl macrogol 8-glyceride (Labrasol(®)), and cineole.To study the influence of the PEVs on (trans)dermal delivery of minoxidil, in vitro diffusion experiments were performed through new born pig skin and the results were compared with that obtained applying the vesicular system without enhancer (control) after pretreatment of the skin with the various enhancers. In this study, Fourier transform infrared spectroscopy (FTIR), attenuated total reflectance FTIR (ATR-FTIR) and FTIR imaging were used to evaluate the effective penetration of minoxidil in the skin layers and to discover the influence of the enhancer on the drug topical delivery. These analytical studies allowed us to characterize the drug formulations and to evaluate the vesicle distribution into the skin. Recorded spectra confirmed that the vesicle formulations with penetration enhancers promoted drug deposition into the skin.
Asunto(s)
Portadores de Fármacos/química , Sistemas de Liberación de Medicamentos/métodos , Minoxidil/administración & dosificación , Minoxidil/química , Administración Cutánea , Animales , Química Farmacéutica/métodos , Ciclohexanoles/química , Glicoles de Etileno/química , Eucaliptol , Glicéridos , Lecitinas/química , Minoxidil/farmacocinética , Monoterpenos/química , Compuestos Orgánicos/química , Permeabilidad , Piel/metabolismo , Absorción Cutánea , Proteínas de Soja/química , Espectrofotometría Infrarroja/métodos , PorcinosRESUMEN
The purpose of this study was to develop a new delivery system capable of improving bioavailability and controlling release of hydrophilic drugs. Metformin-loaded liposomes were prepared and to improve their stability surface was coated with chitosan cross-linked with the biocompatible ß-glycerolphosphate. X-ray diffraction, differential scanning calorimetry, as well as rheological analysis were performed to investigate interactions between chitosan and ß-glycerolphosphate molecules. The entrapment of liposomes into the chitosan-ß-glycerolphosphate network was assessed by scanning electron microscopy and transmission electron microscopy. Swelling and mucoadhesive properties as well as drug release were evaluated in vitro while the drug oral bioavailability was evaluated in vivo on Wistar rats. Results clearly showed that, compared to control, the proposed microcomplexes led to a 2.5-fold increase of metformin T(max) with a 40% augmentation of the AUC/D value.
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Quitosano/química , Portadores de Fármacos , Glicerofosfatos/química , Hipoglucemiantes/administración & dosificación , Hipoglucemiantes/farmacocinética , Metformina/administración & dosificación , Metformina/farmacocinética , Adhesividad , Administración Oral , Animales , Área Bajo la Curva , Disponibilidad Biológica , Rastreo Diferencial de Calorimetría , Química Farmacéutica , Quitosano/análogos & derivados , Preparaciones de Acción Retardada , Mucosa Gástrica/metabolismo , Hipoglucemiantes/química , Absorción Intestinal , Mucosa Intestinal/metabolismo , Liposomas , Masculino , Metformina/química , Microscopía Electrónica de Rastreo , Microscopía Electrónica de Transmisión , Ratas , Ratas Wistar , Reología , Solubilidad , Tecnología Farmacéutica/métodos , Difracción de Rayos XRESUMEN
BACKGROUND: Italian legislation establishes the obligation for the employer to assess any risks to the safety and health of workers, including those relating to work-related stress (WRS). Several studies have proved the existence of a link between WRS and both individual diseases and organizational results. OBJECTIVE: The research aimed at detecting WRS risk factors in a hospital consisting of 53 departments employing 2334 workers. METHODS: A qualitative and quantitative approach was adopted divided into six steps: 1) analysis of the hospital indicators; 2) semistructured interviews of the 53 department heads; 3) preparation of a checklist including 42 WRS risk indicators; 4) observation by shadowing of the 53 departments; 5) setting up of 53 focus groups with staff from each department; 6) distribution of the check-list to a representative sample of 747 employees. RESULTS: Data analysis showed a "low" level of WRS risk regarding the hospital as a whole, a "medium" level regarding six transversal indicators and eight departments. Three indicators considered particularly significant were examined in detail: "workplace and ergonomic conditions", "shift work", "interruptions in work flow". CONCLUSIONS: The results helped to identifj a series of best practices aimed at reducing WRS risk that are applicable to other health care settings. The qualitative and quantitative approach produced a keen involvement of the employees of the hospital which will positively encourage the real efficacy of the measures taken.
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Enfermedades Profesionales/epidemiología , Personal de Hospital , Medición de Riesgo/métodos , Estrés Fisiológico , Estrés Psicológico/epidemiología , Adulto , Lista de Verificación , Ergonomía , Grupos Focales , Administradores de Hospital/psicología , Departamentos de Hospitales , Humanos , Italia , Enfermedades Profesionales/etiología , Enfermedades Profesionales/prevención & control , Salud Laboral/legislación & jurisprudencia , Personal de Hospital/psicología , Investigación Cualitativa , Mejoramiento de la Calidad , Medición de Riesgo/legislación & jurisprudencia , Muestreo , Estrés Psicológico/etiología , Estrés Psicológico/prevención & control , Tolerancia al Trabajo Programado , Flujo de Trabajo , Lugar de TrabajoRESUMEN
The use of nanocarriers in medicine, so-called nanomedicine, is one of the most innovative strategies for targeting drugs at the action site and increasing their activity index and effectiveness. Phytomedicine is the oldest traditional method used to treat human diseases and solve health problems. The recent literature on the treatment of malaria infections using nanodelivery systems and phytodrugs or supplements has been analyzed. For the first time, in the present review, a careful look at the considerable potential of nanomedicine in promoting phytotherapeutic efficacy was done, and its key role in addressing a translation through a significant reduction of the current burden of malaria in many parts of the world has been underlined.
Plants hide an incredible treasure chest of beneficial substances within them. These natural substances have a wide range of beneficial applications for human health, from nutrition to personal care, including the treatment of diseases such as malaria. However, to exploit the full potential of these substances, an innovative approach is needed, and nanomedicine promises that. Nanomedicine involves the use of nanosystems, incredibly small systems, invisible to the naked eye, but their impact is enormous. Thus, bioactive compounds in plants that may have beneficial effects on human health can be placed within these nanosystems to improve their effectiveness. This synergy between nature and nanotechnology offers new opportunities to improve health and well-being, demonstrating how valuable science and technology are in exploring the natural world. After examining the key advantages of nanosystems, this review focuses on some of the earliest antimalarials used and then looks at newer and more promising ones, starting with quinine, extracted from Cinchona bark; moving to the discovery of artemisinin, obtained from Artemisia annua and its derivatives; and ending with an analysis of alternative natural molecules with antimalarial activity. This review examines how nanomedicine can make natural plant-based treatments more effective in fighting malaria. This could help reduce the impact of malaria in many places around the world.