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Pink pepper (Schinus terebinthifolius Raddi) has high potential for commercial use because of its biological activities (anti-inflammatory, antitumor, and antioxidant activities, among others). Herein, the antioxidant activity of a topical formulation containing pink pepper extract obtained by supercritical carbon dioxide extraction is reported. The effects of extraction pressure (100-300 bar) and temperature (40-60 °C) on its antioxidant activity were investigated. The extracts obtained at 50-60 °C showed a higher inhibition percentage in the α,α-diphenyl-β-picrylhydrazyl (DPPH) assay (80.16-91.27 %), regardless of pressure. The extract obtained under optimized conditions (200 bar and 50 °C) was incorporated into an oil-in-water emulsion containing 2 % (m/m) pink pepper extract. The product presented a creamy texture, light rose color, mild spicy odor, and desirable pH for a topical formulation. Furthermore, the product was stable and remained effective when stored and protected from heat and light, showing 35.38 % inhibition of DPPH.

The effect of nanoencapsulation on the in vitro photoprotection and antioxidant properties of blueberry (Vaccinium myrtillus) extract, before and after their dispersion into an oil-in-water emulsion and its final stability under stress conditions. Besides its skin healing activity, chitosan was chosen as wall material due to its natural origin, and possibility of obtention from shrimp residues. Chitosan/tripolyphosphate (TPP) nanoparticles loaded with blueberry extract were produced and characterized. Three different semi-solid oil-in-water emulsions, using Ecocert certified materials, were developed containing, respectively, (i) 5% (wt/wt) of extract-free nanoparticles, (ii) 5% (wt/wt) of extract-loaded nanoparticles, (iii) 2% (wt/wt) of free extract. Sun protection factor (SPF), antioxidant activity and stability under stress conditions were evaluated. The concentration of rutin was determined by High Performance Liquid Chromatography (HPLC). The loading of blueberry extract into nanoparticles kept their physicochemical properties, as well as SPF and antioxidant activity, over the course of the stability study. Extract-loaded nanoparticles were dispersed in a semi-solid oil-in-water emulsion and were shown to protect the extract from oxidation, suggesting that formulation containing 5% (wt/wt) of extract-free nanoparticles could presented lower difference between initial and final SPF and antioxidant activity values after 90 days of analysis. The developed formulation is proposed as a greener potential formulation to be used as photoprotector, especially if associated with physical sun filters. The role of blueberry flavonoids and the synergistic effect of nanoparticles against skin aging are here discussed., This research was funded by FAPESP (grant number 2015/25533–7, 2017/14757–7, 2017/05275–9) and in part by CAPES (Finance Code 001). This study was financed by CNPq (301436/2017–7) granted to PGM, and by the Portuguese Science and Technology Foundation (FCT / MCT) and from European Funds (PRODER/COMPETE) under the project reference UIDB/04469/2020 (strategic fund), co-financed by FEDER, under the Partnership Agreement PT2020, granted to EBS., info:eu-repo/semantics/publishedVersion

For centuries, bromelain has been used to treat a range of ailments, even though its mechanism of action is not fully understood. Its therapeutic benefits include enzymatic debridement of the necrotic tissues of ulcers and burn wounds, besides anti-inflammatory, anti-tumor, and antioxidant properties. However, the protease is unstable and susceptible to self-hydrolysis over time. To overcome the stability issues of bromelain, a previous study formulated chitosan-bromelain nanoparticles (C-B-NP). We evaluated the optimized nanoformulation for in vitro antioxidant, cell antiproliferative activities and cell migration/proliferation in the scratch assay, comparing it with free bromelain. The antioxidant activity of free bromelain was concentration and time-dependent; after encapsulation, the activity level dropped, probably due to the slow release of protein from the nanoparticles. In vitro antiproliferative activity was observed in six tumor cell lines for free protein after 48 h of treatment (glioma, breast, ovarian, prostate, colon adenocarcinoma and chronic myeloid leukemia), but not for keratinocyte cells, enabling its use as an active topical treatment. In turn, C-B-NP only inhibited one cell line (chronic myeloid leukemia) and required higher concentrations for inhibition. After 144 h treatment of glioma cells with C-B-NP, growth inhibition was equivalent to that promoted by the free protein. This last result confirmed the delayed-release kinetics of the optimized formulation and bromelain integrity. Finally, a scratch assay with keratinocyte cells showed that C-B-NP achieved more than 90% wound retraction after 24 h, compared to no retraction with the free bromelain. Therefore, nanoencapsulation of bromelain with chitosan conferred physical protection, delayed release, and wound retraction activity to the formulation, properties that favor topical formulations with a modified release. In addition, the promising results with the glioma cell line point to further studies of C-B-NP for anti-tumor treatments.

The cashew nut is an important product in Brazil, both for consumption and export, with the pulp of the cashew fruit being considered a by-product despite its high flavonoid content. In this study, the use of cashew pulp extract as a treatment for acne and in the prevention of early skin damage was investigated. Its flavonoid content was determined using spectrophotometric identification, and its effects on cell and bacterial viability, the migration of keratinocytes, and antioxidant activity in vitro were evaluated. Furthermore, it was incorporated into an emulsion for topical administration, and the physical-chemical stability parameters of the formulation were determined. The cashew pulp contained flavonoids with healing and antioxidant activity, and was not toxic to keratinocyte cells in a viability test. The flavonoid-rich formulation was stable, indicating that this is a promising formulation for use in the treatment of acne and protection of skin against premature damage.

Pterodon pubescens Benth is a Brazilian native species, used in folk medicine for chronic pain relief. The anti-inflammatory, antinociceptive, and antiproliferative activities attributed to the species have a straight relationship with vouacapans (furanditerpenes) and geranylgeraniol (acyclic diterpenes), identified in P. pubescens extracts. Nevertheless, scarce reports are found on product development and stability studies containing this species. This gap prompted the stability outcome evaluation of carbomer-940 gel-based formulations containing P. pubescens microencapsulated extract compared to non-encapsulated extract reported herein. Seeds were extracted with dichloromethane providing 46.6% (w/w) crude extract yield. Phytochemical markers were monitored by High Pressure Liquid Chromatography with Diode Array Detector (HPLC-DAD) and Gas Chromatography coupled to Mass Detection (GC-MS) using the vouacapans 1:1 ratio isomers 6α-hydroxy-7β-acetoxy-vouacapan-17β-oate methyl ester and 6α-acetoxy-7β-hydroxy-vouacapan-17β-oate methyl ester for quantification and identification purposes. Spray-dried microcapsules were produced with cashew gum as wall material with structure confirmed by scanning electron microscopy (SEM) and size distribution by light scattering parameters. The particles presented a bimodal size distribution ranging from 0.2 to 500 μm, vouacapans content and encapsulation efficiency of 55.6% and 44.4% respectively, with an overall spray-drying yield of 82.6% (w/w). The formulation containing microencapsulated extract did not achieve an acceptable outcome under test condition, with further studies needed for optimization. Nevertheless, the gel containing 2.5% (w/v) of non-encapsulated extract stored at 25 °C protected from light presented the best results within 180 days in stability study. P. pubescens incorporation maintained rheological properties with better performance when exposed to light during storage time compared to the gel base formulation. The formulation delivered vouacapans throughout a synthetic membrane. This formulation is the first step to achieve a novel topical gel-based product containing P. pubescens beneficial activities.

Nature has been a source of medicinal treatments for thousands of years, with the use of plants as prototypes for drug development and for the extraction of active compounds. Skin injuries occur regularly in everyday life, and the human skin has the ability to promote repair spontaneously under healthy conditions. However, some intrinsic and external factors may interfere with skins' natural ability, leading to nonhealing lesions and chronic wounds, which directly affect health and quality of life. Thus, attention should be given to this health problem, using an appropriated management when necessary. In this scenario, phytotherapy may be an option for cutaneous wound treatment, although further high-quality studies are needed to firmly establish the clinical efficacy of plants. This article reviews traditionally used natural actives for wound healing, highlighting their characteristics and mode of action.

The aim of the present study was to carry out stability tests and in vitro sun protection factor (SPF) evaluations of formulations containing free or microencapsulated chemical sun filters to improve their use. To this end, three formulations were developed and subjected to stability studies. The most stable formulation was chosen as a vehicle for free and microencapsulated chemical sun filters, and subjected to further stability studies and in vitro SPF assays. The SPF values were approximately 12 and 11 for formulations containing free and encapsulated sun filters, respectively, and both types were stable under stress. Chemical sun filters can be microencapsulated, which may aid in generating innovative sunscreen formulations.

An ideal wound dressing ensures a moist environment around the wound area and absorbs exudates from the wound surface. Topical application of bromelain to incised wounds has been shown to reprogram the wound microenvironment to promote effective tissue repair. Combining the characteristics of hydrogels and bromelain is therefore of great interest. Herein, we describe the development of a hydrogel, formulated using alginate and Arabic gum, for bromelain loading and release. The hydrogel formulation was evaluated using response surface methodology, considering the pH value and the concentration of alginate and Arabic gum. Bromelain loading and release were evaluated based on passive diffusion. Differential scanning calorimetry and Fourier transform infrared spectroscopy were performed to confirm bromelain immobilization in the hydrogel. The final hydrogel formulation had a swelling ratio of 227 % and incorporated 19 % of bromelain from a bromelain solution. Bromelain immobilization in the hydrogel was the result of hydrogen bond formation and was optimal at 4 °C after 4 h of contact. This evidence suggests that bromelain entrapment into a hydrogel is a promising strategy for the development of wound dressings that support the debridement of burns and wounds.

O alecrim, uma planta usada popularmente, contem compostos bioativos com notada capacidade antioxidante, como o acido carnosico e o acido rosmarinico. Quatro metodos de extracao foram avaliados quanto a eficiencia na extracao dos compostos antioxidantes e sua acao no ensaio de cicatrizacao scratch. Dentre os metodos utilizados, a maceracao se mostrou a mais eficiente na extracao dos compostos antioxidantes. Os extratos apresentaram atividade antioxidante e nao apresentaram citotoxicidade significativa, porem o extrato obtido pelo metodo maceracao, testado no cicatrizacao in vitro, nao acelerou o processo de cicatrizacao nas condicoes testadas.

Bromelain, a set of proteolytic enzymes potential pharmaceutical applications, was encapsulated in chitosan nanoparticles to enhance enzyme stability, and the effect of different chitosan sources was evaluated. Chitosan types (i.e., low molecular weight chitosan, chitosan oligosaccharide lactate, and chitosan from shrimp shells) produced nanoparticles with different physicochemical properties, however in all cases, particle size and zeta potential decreased, and polydispersity index increased after bromelain addition. Bromelain encapsulation was higher than 84% and 79% for protein content and enzymatic activity, respectively, with low molecular weight chitosan presenting the highest encapsulation efficiency. Nanoparticle suspension was also tested for accelerated stability and rheological behavior. For the chitosan–bromelain nanoparticles, an instability index below 0.3 was recorded and, in general, the loading of bromelain in chitosan nanoparticles decreased the cohesiveness of the final suspension., This research was granted by FAPESP (2016/03444-5,2017/05275-9,and2017/05333-9), CNPq and FAEPEX, and by the Portuguese Science and Technology Foundation, Ministry of Science and Education (FCT/MEC) through national funds, and co-financed by FEDER, under the project reference M-ERA-NET/0004/2015 (PAIRED) Partnership Agreement PT2020., info:eu-repo/semantics/publishedVersion

The aim of this study was to develop a phytocosmetic sunscreen emulsion with antioxidant effect, containing a blend of flavonoid-enriched plant extracts. In vitro sun protection factor, antioxidant activity, skin irritation, photostability, cutaneous permeation, and retention of flavonoids were evaluated. Thermodynamically stable emulsions were obtained and tested for sensorial analysis after loading the blend of extracts. The selected emulsion was stable when stored at low temperatures (5 C), for which after 120 days the concentration of quercetin and rutin were above their limit of quantification, i.e., 2.8 &plusmn, 0.39 &micro, g/mL and 30.39 &plusmn, g/mL, respectively. Spreadability, low rupture strength and adhesiveness were shown to be similar to a conventional topical product. Higher brittleness, pseudo-plastic, and viscoelastic behaviors were also recorded for the developed phytocosmetic sunscreen. The product presented a critical wavelength of 387.0 nm and ultraviolet rays A and B (UVA/UVB) rate of 0.78, confirming that the developed formulation shows capacity for UVA/UVB protection, protecting skin against damages caused by Ultraviolet (UV) radiation. Rutin was shown to permeate the skin barrier and was also quantified in the stratum corneum (3.27 &plusmn, 1.92 &micro, g/mL) by tape stripping and retention test (114.68 &plusmn, 8.70 &micro, g/mL). The developed flavonoid-enriched phytocosmetic was shown to be non-irritant to skin by an in vitro assay. Our results confirm the antioxidant activity, sun protection, and physical properties of the developed phytocosmetic for topical application.

Os filtros solares são formulações capazes de proteger a pele contra raios ultravioletas, os quais causam diferentes danos à pele. Os filtros solares podem ser divididos em filtros químicos e físicos, em que os filtros químicos apresentam maior suscetibilidade de irritação da pele em relação aos filtros físicos. Os estudos com substâncias naturais visam diminuir a irritação causada por alguns filtros solares, ao passo que algumas substâncias estudadas apresentam um carácter de proteção contra os raios ultravioletas, como os flavonóides. Esse projeto teve como objetivo continuar os estudo de determinação de antocianinas e do fator de proteção solar presente no extrato hidroalcoólico obtido a partir do mirtilo (Vaccinium ashei). Essas características foram determinadas através de uma metodologia in vitro utilizando espectrofotometria na região do ultravioleta. Posteriormente, foi desenvolvida uma formulação cosmética, na qual foi incorporado o extrato previamente microencapsulado. A formulação com e sem a presença do extrato foi analisada quanto ao fator de proteção solar, teor de antocianinas e atividade antioxidante in vitro, além do estudo de sua estabilidade com a verificação dos valores de pH, densidade e viscosidade, após a exposição a condições de estresse. Essas análises tiveram como objetivo a utilização de uma substância natural para o desenvolvimento de um produto alternativo no combate à radiação solar e ao envelhecimento precoce da pele.

The aim of study was to determine the in vitro sun protection factor (SPF) and the photostability profile of a topical formulation composed of nanoparticles loaded with vegetable extracts and to assess its physicochemical properties. Chitosan/tripolyphosphate (TPP) nanoparticles loaded with flavonoids-enriched vegetable extracts (Ginkgo biloba L., Dimorphandra mollis Benth, Ruta graveolens, and Vitis vinifera L.) were produced and characterized for their morphology, mean particle size, zeta potential, and encapsulation efficiency. A final topical formulation was obtained by dispersing chitosan/TPP nanoparticles in an o/w emulsion. Results showed that nanoparticles dispersion exhibited yellowish color, spherical shape, and uniform appearance. Extract-loaded chitosan/TPP nanoparticles showed a mean particle size of 557.11±3.1 nm, polydispersity index of 0.39±0.27, zeta potential of +11.54±2.1 mV, and encapsulation efficiency of 75.89% of rutin. The recorded texture parameters confirm that the developed formulation is appropriate for skin application. The SPF obtained was 2.3±0.4, with a critical wavelength of 387.0 nm and 0.69 UVA/UVB ratio. The developed formulation exhibited photostability, allowing the release of flavonoids from nanoparticles while retaining rutin into the skin in a higher extension., The authors acknowledge FAPESP (grant number 2015/25533-7 and 2017/14757-7), CAPES, and CNPq agencies for the financial support of this study. The authors also acknowledge the financial support received from the Portuguese Science and Technology Foundation (FCT/MCT) and from the European Funds (PRODER/COMPETE) under the project reference M-ERA-NET/0004/2015-PAIRED, co-financed by FEDER, under the Partnership Agreement PT2020., info:eu-repo/semantics/publishedVersion

The aim of this study was to validate a HPLC method for the assay of flavonoids in extracts obtained from natural sources, i.e., from Dirmophandra mollis Benth, Ginkgo biloba L., Ruta graveolens L., and Vitis vin&iacute, fera L. The potential sun protecting effect, antioxidant activity, and cell viability of the extracts were also determined. Individual extracts (obtained from each individual species) and a mixed extract (containing the four extracts) were analyzed by the validated HPLC method for the identification of flavonoids and quantification of rutin and quercetin. An in vitro cell viability study was carried out using the neutral red method. The in vitro sun protection factor was determined by spectral transmittance and in vitro antioxidant efficacy was evaluated against DPPH, ABTS, and AAPH radicals. The HPLC method used for the identification and quantification of flavonoids in extracts exhibited linearity, precision, accuracy, and robustness. Detection and quantification limits were, respectively, 2.881 &plusmn, 0.9 &mu, g&middot, mL&minus, 1 and 0.864 &plusmn, 1 for quercetin, and 30.09 &plusmn, 1 &mu, 1 and 9.027 &plusmn, 1.1 &mu, 1 for rutin. All extracts did not affect cell viability at the evaluated concentration range and exhibited a sun protection effect and antioxidant activity. Among the evaluated extracts, Ginkgo biloba L. and the mixed extract depicted the most expressive antioxidant activity. The mixed extract exhibited sunscreen protection against ultraviolet A (UVA) and ultraviolet B (UVB) and a critical wavelength of 372.7 &plusmn, 0.1. Our results translate the enhanced flavonoids&rsquo, composition of the mixed extract, which may be a potential alternative over sunscreens and antioxidants in pharmaceutic/cosmetic formulations.

A flavonoid enriched extract (FE) was obtained from grape peels, and in vitro SPF, antioxidant activity, and effects on cell viability of this extract were tested with the intent to develop a cosmetic product. A formulation was developed with the FE, and the stability of this mixture was evaluated in terms of pH, density, viscosity, and SPF (90-days). FE showed no cytotoxicity to human keratinocytes and an in vitro SPF of 18.56 (UV-spectrophotometry). Further, FE showed a UVA protection factor of 3.17 ± 0.2, a critical wavelength of 318.0 ± 0.1 and a UVA/UVB of 0.9. Antioxidant activity assays resulted in 92.08% and 86.85% of activity against DPPH and ABTS (IC50 = 296.90 ± 1.2 µg/mL and 643.13 ± 0.9 µg/mL), respectively. Finally, SPF of formulation with FE was 12.45. Results from the in vitro SPF and product stability tests (especially storage under refrigeration), indicate that FE is a promising compound for use as an innovative sunscreen formulation.

This study aims to evaluate properties as antioxidant activity, solar protection factor (SPF) and wound healing ability of jaboticaba peel's extract by in vitro methods. Jaboticaba peels were removed, dried, and then subjected to extraction method using ethanol. The extract was in vitro evaluated for preliminary studies about SPF, antioxidant activity and wound healing assay. Thereafter the extract was incorporated in an oil-in-water emulsion (phytocosmetic). The phytocosmetic was submitted to stability study and in vitro SPF evaluation. The extract's showed purple color with in vitro SPF of 24.86, stimulated keratinocytes migration after 9 h of exposition and presented antioxidant activity. The incorporation of the extract gave the phytocosmetic formulation a light pink shade with an in vitro SPF of 19.00. Under stress conditions, the formulation was stable, especially when stored in low temperatures. Jaboticaba peel extract promoted wound healing in vitro presenting SPF and antioxidant activity. Final phytocosmetic formulation was stable when stored protect from light and heat, indicating that Jaboticaba extract can be used to develop products to protect skin against aging and sun exposure.

Bromelain has many therapeutic properties including wound healing and blood circulation improvement. However, bromelain is usually unstable and suffers autolysis, which results in a decrease of enzymatic activity and limited applications. Encapsulation of bromelain in nanoparticles can diminish degradation by protease immobilization, which may increase its stability and efficacy. The natural polymer chitosan can be nanostructured and trap the enzyme, maintaining the claims of biocompatibility, biodegradability and natural source of the formulation ingredients. Considering the above, chitosan-bromelain nanoparticles (C-B-NP) were produced by ionic crosslinking and presented spherical shape (electron microscopy) of 100.9 ± 0.5 nm and polydispersity index of 0.222 ± 0.012 (dynamic light scattering). Encapsulation efficiency was calculated as 85.1 ± 1% with regard to enzymatic activity, and C-B-NP presented 4.9 U/mL of enzymatic activity, which corresponds to 104.7% of free bromelain activity, confirming its integrity upon encapsulation. However, C-B-NP were unstable when stored in aqueous suspension, leading to freeze-drying studies of the formulation. Glycine and maltose were used as potential lyoprotectors and the formulation optimized by a factorial design; resultant products presented short resuspension time, slightly altered nanoparticles mean size and increased encapsulation rate compared to the previous liquid form. Maltose was able to better maintain formulation's enzymatic activity over time (90 days), especially when stored under refrigeration. Therefore, freeze-dried C-B-NP can effectively improve bromelain and nanoparticle stability, which allow further in vivo applications as a dried powder for topical administration or as a raw material for other dosage forms.

Sunscreens contain molecules with the ability to absorb and/or reflect UVA (ultraviolet A) and UVB (ultraviolet B) radiation, thereby preventing this radiation from reaching the epidermis or dermis. Their photo stabilities after exposure to UV radiation are well known and described, but there is little data on the stability of these filters after fluorescent indoors light radiation, such as from light emitted by commercial lamps present in homes and offices. Those lamps can expose people to varying levels of UVB, UVA, visible light, and IR (infrared). This study assesses the photostability of four different commercial products containing chemical sun filters after artificial UV and fluorescent irradiation, correlating the UVB and UVA absorption efficiencies of each product against the different types of radiation. The tested products were applied on a plate of polymethylmethacrylate (PMMA) and irradiated by a solar simulator with specific filters for UVA and UVB and a commercial fluorescent light source. According to the results, three formulations did not show photostability, suffering significant changes in their UV absorption spectra, and one of the selected formulations can be considered photostable. This reinforces the importance of conducting stability studies for sunscreen formulations in different conditions, including under artificial (indoor) light exposure.

Background: The fruits acerola and red plum are known to be good sources of antioxidants, particularly vitamin C. Antioxidants are compounds that protect organisms from biomolecular damage, such as accelerated aging, caused by free radicals. Objective: The objective of this study was to extract vitamin C from acerola and red plum, incorporate these extracts into different topical formulations, and evaluate the physicochemical stabilities of these formulations under stress conditions. Methods: Vitamin C was extracted from acerola and red plum via dynamic maceration for 2 h at 50 ± 2°C and was quantified via HPLC. In vitro antioxidant activities were evaluated using DPPH assays. The extracts were then incorporated into emulsion and gel formulations in two types of packaging, and stability studies were carried out. Results: Red plum and acerola extracts were orange and red and contained vitamin C concentrations of 2732.70 ± 93.01 mg/100 g and 2.60 ± 1.2 mg/100 g, respectively. In vitro antioxidant activity resulted in over 90.0% inhibition of free radicals at 0.01 mL/mL acerola extract and 0.1 mL/mL red plum extract. In the stability study, pH values decreased for both acerola formulations when stored in the oven or in transparent glass containers. Formulations containing red plum extract were stable under all conditions. Acerola extracts contained a higher concentration of vitamin C than red plum extracts. Both extracts possessed antioxidant activity, although the acerola-based formulation was unstable when stored at high temperatures or in transparent glass containers. Highlights: Extracts from red plum and acerola contained vitamin C; antioxidant activity of the extracts resulted in over 90.0% inhibition of free radicals. Formulations containing red plum were stable under all tested conditions, and formulations containing acerola were unstable when stored in the oven or in transparent glass containers.

Background Berries are known for their antioxidant activity due to the presence of flavonoids. Antioxidants' usage guarantees skin protection against free radicals and, flavonoids, especially, can act as sunscreen. The aim of this paper was to evaluate solar protection factor (SPF) and antioxidant activity in vitro of blackberry and raspberry extracts incorporated in topical formulation and study their stability. Results Raspberry presented 29.93 mg of anthocyanins/100 g of fruit and blackberry 65.58 mg of anthocyanins/100 g of fruit. In vitro solar protection factor was 54.57 to blackberry and 37.32 to raspberry. When incorporated in O/W emulsions, final formulations showed light pink color, creamy aspect, and typical fruity odor. Formulations submitted to indirect light and stove showed odor and color alterations. Conclusions Based on the results, formulations containing extracts should be kept under refrigeration in opaque package to ensure stability due to the presence of flavonoids. In addition, blackberry and raspberry extracts are potential natural alternatives to be used as sunscreen and to prevent skin aging.

Nature has been a source of medicinal treatments for thousands of years, with the use of plants as prototypes for drug development and for the extraction of active compounds. Skin injuries occur regularly in everyday life, and the human skin has the ability to promote repair spontaneously under healthy conditions. However, some intrinsic and external factors may interfere with skins' natural ability, leading to nonhealing lesions and chronic wounds, which directly affect health and quality of life. Thus, attention should be given to this health problem, using an appropriated management when necessary. In this scenario, phytotherapy may be an option for cutaneous wound treatment, although further high-quality studies are needed to firmly establish the clinical efficacy of plants. This article reviews traditionally used natural actives for wound healing, highlighting their characteristics and mode of action.

Made available in DSpace on 2022-04-28T19:01:45Z (GMT). No. of bitstreams: 0 Previous issue date: 2015-01-01 Lycopene is a carotenoid found in tomatoes with potent antioxidant activity. The aim of the study was to obtain an extract containing lycopene from four types of tomatoes, validate a quantification method for the extracts by HPLC, and assess its antioxidant activity. Results revealed that the tomatoes analyzed contained lycopene and antioxidant activity. Salad tomato presented the highest concentration of this carotenoid and antioxidant activity. The quantification method exhibited linearity with a correlation coefficient of 0.9992. Tests for the assessment of precision, accuracy, and robustness achieved coefficients with variation of less than 5%. The LOD and LOQ were 0.0012 and 0.0039 μg/mL, respectively. Salad tomato can be used as a source of lycopene for the development of topical formulations, and based on performed tests, the chosen method for the identification and quantification of lycopene was considered to be linear, precise, exact, selective, and robust. University of São Paulo State Faculty of Pharmaceutical Sciences, Araraquara-Jau Highway, Km 1

Licopeno é um carotenóide com potente atividade antioxidante encontrado em grande quantidade no tomate e usado no combate a diversas doenças como doenças cardiovasculares e diferentes tipos de cânceres, incluindo o câncer de próstata. O objetivo desse trabalho foi desenvolver uma emulsão contendo extrato de licopeno obtido do tomate salada e avaliar a citotoxicidade do extrato, a estabilidade, o comportamento reológico, atividade antioxidante e permeação do fitocosmético. O cosmético foi desenvolvido utilizando fase oleosa contendo derivados de Karité e submetido à avaliação da estabilidade físico-química, espalhabilidade, análise térmica, comportamento reológico, qualidade microbiológica, citotoxicidade, atividade antioxidante e testes de permeação e retenção cutânea. Os resultados demonstraram que o fitocosmético é estável, apresenta comportamento reológico desejável para uma formulação tópica e é um produto promissor para ser utilizado no combate à aceleração do envelhecimento cutâneo. Lycopene, a carotenoid and potent antioxidant is found in large quantities in tomatoes. Lycopene combats diseases, such as cardiovascular disease and different types of cancer, including prostate cancer. However, its topical use in emulsion form for the combat of skin aging is under-explored. The aim of the present study was to develop an emulsion containing lycopene extracted from salad tomatoes and evaluate its cytotoxicity, stability, rheological behavior, antioxidant activity and phytocosmetic permeation. The developed cosmetic comprised an oil phase made up of shea derivatives and was evaluated in terms of its physiochemical stability, spreadability, thermal analysis, rheological behavior, microbiological quality, cytotoxicity, antioxidant activity, cutaneous permeation and retention. The results demonstrate that this phytocosmetic is stable, exhibits satisfactory rheological behavior for a topical formula and is a promising product for combating skin aging.