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1.
Food Chem X ; 23: 101765, 2024 Oct 30.
Artigo em Inglês | MEDLINE | ID: mdl-39280213

RESUMO

The Kadsura coccinea fruit is a wild fruit that may be eaten and used medicinally. Its seeds are rich in nutrients but are typically thrown away without processing.The physicochemical characterization, volatiles, fatty acids, lipids and concomitants of cold-processed seed oils from four kinds of K. coccinea were evaluated. The average kernel yield and oil yield of K. coccinea seeds were 68.21 % and 30.44 %, respectively. The seed oil contains a moderate level of total phenolics (368.99-503.99 mgGAE/100 g), total flavonoids (95.01-126.18 mg RE/100 g), and ß-sitosterol (1498.8-1712.7 mg/kg) with higher iodine value, lower acid value, saponification value and shorter induction time. GC analysis reveals appreciable amounts of linoleic acid (64.91-68.05 %) and squalene in seed oil. GC-MS analysis showed that the major volatile compounds were γ-muurolene (27.25-31.7 %), ß-himachalene (19.51-20.37 %) and ß-curcumene (15.78-16.78 %). Moreover, 16 terpenoids, 14 phenolics were identified by UPLC-QTOF-MS/MS. These results suggest that K. coccinea seed seems an promising alternative oilseed with biological ingredients for food, cosmetics and pharmaceutical industries.

2.
J Ethnopharmacol ; 334: 118542, 2024 Nov 15.
Artigo em Inglês | MEDLINE | ID: mdl-38992404

RESUMO

ETHNOPHARMACOLOGICAL RELEVANCE: Dried roots of Peucedanum decursivum, a traditional Chinese medicine (TCM), has historically respiratory diseases such as cough, thick phlegm, headache, fever, and gynecological diseases, rheumatoid arthritis, and nasopharyngeal carcinoma. AIM OF THE STUDY: Made an endeavor to evaluate the research trajectory of P. decursivum, comprehensively discern its developmental status, and offer a guideline for future investigations. MATERIALS AND METHODS: A meticulous search of literatures and books from 1955 to 2024 via databases like PubMed, Web of Science and CNKI was conducted, including topics and keywords of " P. decursivum" "Angelica decursivum" and "Zihua Qianhu". RESULTS: P. decursivum and its prescriptions have traditionally been used for treating phlegm-heat cough, wind-heat cough, gastrointestinal diseases, pain relief and so on. It contains 234 identified compounds, encompassing coumarins, terpenes, volatile oils, phenolic acids, fatty acids and derivatives. It exhibits diverse pharmacological activities, including anti-asthmatic, anti-inflammatory, antioxidant effects, anti-hypertensive, anti-diabetic, anti-Alzheimer, and anti-cancer properties, primarily attributed to coumarins. Microscopic identification, HPLC fingerprinting, and bioinformatics identification are the primary methods currently used for the quality control. CONCLUSION: P. decursivum demonstrates anti-asthmatic, anti-inflammatory, and antioxidant effects, aligning with its traditional use. However, experimental validation of its efficacy against phlegm and viruses is needed. Additionally, analgesic effects mentioned in historical texts lack modern pharmacological studies. Numerous isolated compounds exhibit highly valuable medicinal properties. Future research can delve into exploring these substances further. Rigorous of heavy metal contamination, particularly Cd and Pb, is necessary. Simultaneously, investigating its pharmacokinetics and toxicity in humans is crucial for the safety.


Assuntos
Apiaceae , Etnobotânica , Etnofarmacologia , Compostos Fitoquímicos , Controle de Qualidade , Humanos , Compostos Fitoquímicos/farmacologia , Compostos Fitoquímicos/química , Compostos Fitoquímicos/uso terapêutico , Apiaceae/química , Animais , Medicamentos de Ervas Chinesas/farmacologia , Medicamentos de Ervas Chinesas/química , Medicamentos de Ervas Chinesas/uso terapêutico , Medicina Tradicional Chinesa/métodos
3.
Food Chem ; 345: 128468, 2021 May 30.
Artigo em Inglês | MEDLINE | ID: mdl-33341300

RESUMO

Antioxidant interactions of γ-terpinene with α-tocopherol mimic 2,2,5,7,8-pentamethyl-6-chromanol (PMHC) and caffeic acid phenethyl ester (CAPE), used as models, respectively, of mono- and poly-phenols were demonstrated by differential oximetry during the inhibited autoxidation of model substrates: stripped sunflower oil, squalene, and styrene. With all substrates, γ-terpinene acts synergistically regenerating the chain-breaking antioxidants PMHC and CAPE from their radicals, via the formation of hydroperoxyl radicals. The inhibition duration for mixtures PMHC/γ-terpinene and CAPE/γ-terpinene increased with γ-terpinene concentration, while rate constants for radical-trapping were unchanged by γ-terpinene, being 3.1 × 106 and 4.8 × 105 M-1s-1 for PMHC and CAPE in chlorobenzene (30 °C). Using 3,5-di-tert-butylcatechol and 3,5-di-tert-butyl-1,2-bezoquinone we demonstrate that γ-terpinene can reduce quinones to catechols enabling their antioxidant activity. The different synergy mechanism of γ-terpinene with mono- and poly-phenolic antioxidants is discussed and its relevance is proven in homogenous lipids using natural α-tocopherol and hydroxytyrosol as antioxidants, calling for further studies in heterogenous food products.


Assuntos
Monoterpenos Cicloexânicos/química , Monoterpenos Cicloexânicos/farmacologia , Peróxidos/química , Fenóis/química , Fenóis/farmacologia , Polifenóis/química , Polifenóis/farmacologia , Antioxidantes/química , Antioxidantes/farmacologia , Ácidos Cafeicos/química , Ácidos Cafeicos/farmacologia , Cromanos/química , Cromanos/farmacologia , Sinergismo Farmacológico , Álcool Feniletílico/análogos & derivados , Álcool Feniletílico/química , Álcool Feniletílico/farmacologia
4.
J Ethnopharmacol ; 261: 113148, 2020 Oct 28.
Artigo em Inglês | MEDLINE | ID: mdl-32687959

RESUMO

ETHNOPHARMACOLOGICAL RELEVANCE: Bougainvillea spectabilis is an ornamental shrub from Nyctaginaceae family, widely used in the traditional medicine in the treatment of pain, inflammation, and ulcer. Some research investigated the analgesic potential of this plant, however, the in-depth analysis of its antinociceptive properties and molecular mechanism(s) are yet to be revealed. PURPOSE OF THE STUDY: This study, therefore, investigated the antinociceptive potential of methanol extract of the leaves of B. spectabilis (MEBS) with possible molecular mechanism(s) of action using several pre-clinical models of acute and chronic pain in mice. MATERIALS AND METHODS: The dry leaf powder of B. spectabilis was macerated with 100% methanol, and then dried crude extract was used for in vivo experiments. Following the acute toxicity test with 500, 1000, and 2000 mg/kg b.w. doses of MEBS, the central antinociceptive activities of the extract (50, 100, and 200 mg/kg b.w.) were evaluated using hot plate and tail immersion tests, whereas the peripheral activities were investigated using acetic acid-induced writhing, formalin-induced licking and oedema, and glutamate-induced licking tests. Moreover, the possible involvements of cGMP and ATP-sensitive K+ channel pathways in the observed antinociceptive activities were also investigated using methylene blue (20 mg/kg b.w.) and glibenclamide (10 mg/kg b.w.), respectively. We also performed GC/MS-MS analysis of MEBS to identify the phyto-constituents and in silico modelling of the major compounds for potential molecular targets. RESULTS: Our results demonstrated that MEBS at 50, 100, and 200 mg/kg b.w. doses were not effective enough to suppress centrally mediated pain in the hot plate and tail immersion models. However, the extract was potent (at 100 and 200 mg/kg b.w. doses) in reducing peripheral nociception in the acetic acid-induced writhing and inflammatory phase of the formalin tests. Further analyses revealed that MEBS could interfere with glutamatergic system, cGMP and ATP-sensitive K+ channel pathways to show its antinociceptive properties. GC/MS-MS analysis revealed 35 different phytochemicals with potent anti-inflammatory and antinociceptive properties including phytol, neophytadiene, 2,4-Di-tert-butylphenol, fucoxanthin, and Vit-E. Prediction analysis showed high intestinal absorptivity and low toxicity profiles of these compounds with capability to interact with glutamatergic system, inhibit JAK/STAT pathway, scavenge nitric oxide and oxygen radicals, and inhibit expression of COX3, tumor necrosis factor, and histamine. CONCLUSION: Taken together, these results suggested the antinociceptive potentials of MEBS which were mediated through the modulation of glutamatergic, cGMP, and ATP-sensitive K+ channel pathways. These also suggested that MEBS could be beneficial in the treatment of complications associated with nociceptive pain.


Assuntos
Analgésicos/farmacologia , Anti-Inflamatórios/farmacologia , AMP Cíclico/metabolismo , Ácido Glutâmico/metabolismo , Inflamação/prevenção & controle , Canais KATP/metabolismo , Dor Nociceptiva/prevenção & controle , Nyctaginaceae , Folhas de Planta , Analgésicos/isolamento & purificação , Analgésicos/farmacocinética , Animais , Anti-Inflamatórios/isolamento & purificação , Anti-Inflamatórios/farmacocinética , Simulação por Computador , Modelos Animais de Doenças , Inflamação/metabolismo , Masculino , Camundongos , Modelos Biológicos , Dor Nociceptiva/metabolismo , Dor Nociceptiva/fisiopatologia , Nyctaginaceae/química , Limiar da Dor/efeitos dos fármacos , Folhas de Planta/química , Transdução de Sinais
5.
Food Chem ; 301: 125263, 2019 Dec 15.
Artigo em Inglês | MEDLINE | ID: mdl-31377622

RESUMO

The nutritional and sensory quality of a fish fillet is subject to alterations depending on the culinary method used for preparation. The current study aimed to explore the effects of custom culinary preparation methods (steaming, oven-cooking, frying) on the fillet lipid and sensory quality of two important Mediterranean farmed fish species varying in their tissue fat content. These included, lean meagre and medium-fat gilthead seabream. The results indicated that culinary treatment effects on lipid quality differed among species, especially for frying. Frying created unique sensory profiles, whereas steam- and oven-cooking resulted in similar sensory profiles per species. The variable effects of culinary treatments on the lipid and sensory quality indicate that the choice of preparation method should be related to the fish species and its fat content.


Assuntos
Aquicultura , Lipídeos/análise , Dourada , Alimentos Marinhos/análise , Paladar , Animais , Culinária , Especificidade da Espécie
6.
Food Chem ; 290: 286-294, 2019 Aug 30.
Artigo em Inglês | MEDLINE | ID: mdl-31000049

RESUMO

The aim of this study is to shed light on the evolution of the minor compounds in the corn oil oxidation process, through the information provided by direct immersion-microextraction in solid phase followed by gas chromatography/mass spectrometry (DI-SPME-GC/MS). This methodology enables one, in a single run, to establish the identity and abundance both of original oil minor components, some with antioxidant capacity, and of other compounds coming from both main and minor oil components oxidation. For the first time, some of the compounds formed from oil minor components degradation are proposed as new markers of oil incipient oxidation. Although the study refers to corn oil, the methodology can be applied to any other edible oil and constitutes a new approach to characterizing the oxidation state of edible oils.


Assuntos
Óleo de Milho/química , Cromatografia Gasosa-Espectrometria de Massas/métodos , Antioxidantes/química , Óleo de Milho/isolamento & purificação , Ácidos Graxos/análise , Ácidos Graxos/metabolismo , Oxirredução , Microextração em Fase Sólida , Esqualeno/análise , Esqualeno/metabolismo , Tocoferóis/análise , Tocoferóis/metabolismo
7.
J Ethnopharmacol ; 236: 401-411, 2019 May 23.
Artigo em Inglês | MEDLINE | ID: mdl-30703495

RESUMO

ETHNOPHARMACOLOGICAL RELEVANCE: Holigarna caustica (Dennst.) is commonly used in traditional medicine to treat a variety of painful conditions such as eye irritation, inflammation, arthritis, skin diseases, cuts and wounds. AIM OF THE STUDY: The present study was undertaken to investigate the anti-nociceptive and anti-inflammatory activities of the methanol extract of H. caustica leaves and to elucidate its possible mechanism(s) of action. MATERIALS AND METHODS: Fresh leaves of H. caustica were collected, dried, and extracted with methanol (MEHC). MEHC was subjected to activity testing, using chemical-induced (acetic acid and formalin test) and heat-induced (hot plate and tail immersion test) pain models. To determine the possible mechanism behind the anti-nociceptive activity of MEHC, the opioid antagonist naltrexone was used to evaluate the involvement of opioid receptors in the case of formalin, hot plate and tail immersion tests, while the involvement of the cGMP and ATP-sensitive K+ channel pathways were assessed using methylene blue and glibenclamide respectively, in the acetic acid-induced writhing test. In parallel, the carrageenan-induced paw oedema model was used to determine the anti-inflammatory potential of the extract. Exploratory and motor behaviours were evaluated by the open-field test. Various bioactive compounds potentially responsible for the anti-nociceptive and anti-inflammatory activities were ascertained using GC-MS analysis. RESULTS: MEHC showed strong, significant and dose-dependent anti-nociceptive activity in all chemical-induced and heat-induced pain models at all experimental doses. The association of opioid receptors with the observed anti-nociceptive effects was confirmed by using naltrexone. The cGMP and ATP-sensitive K+ channel pathway was also shown to be involved in the anti-nociceptive activity of MEHC. In addition, MEHC exhibited a dose-dependent inhibition of inflammatory oedema induced by carrageenan. MEHC was not connected with changes in either the locomotor activity or motor responses of mice. In a GC-MS analysis, 40 compounds were identified, among which twelve are documented bioactive compounds with potent analgesic and anti-inflammatory properties. CONCLUSIONS: Our current study revealed that MEHC possesses strong central and peripheral anti-nociceptive as well as anti-inflammatory activity. It may also be concluded that both opioid receptors as well as the cGMP and ATP-sensitive K+ channel pathway are involved in the anti-nociceptive mechanism of MEHC. This study rationalizes the ethnomedicinal use of H. caustica leaves in various painful conditions.


Assuntos
Anacardiaceae/química , Analgésicos/farmacologia , Anti-Inflamatórios/farmacologia , Edema/tratamento farmacológico , Dor/tratamento farmacológico , Extratos Vegetais/administração & dosagem , Analgésicos/isolamento & purificação , Analgésicos/uso terapêutico , Animais , Anti-Inflamatórios/isolamento & purificação , Anti-Inflamatórios/uso terapêutico , Bangladesh , Carragenina/toxicidade , Modelos Animais de Doenças , Relação Dose-Resposta a Droga , Edema/induzido quimicamente , Feminino , Humanos , Canais KATP/metabolismo , Masculino , Medicina Tradicional , Metanol/química , Camundongos , Nociceptividade/efeitos dos fármacos , Dor/etiologia , Extratos Vegetais/isolamento & purificação , Folhas de Planta/química , Receptores Opioides/metabolismo , Transdução de Sinais/efeitos dos fármacos
8.
Food Chem ; 271: 630-638, 2019 Jan 15.
Artigo em Inglês | MEDLINE | ID: mdl-30236726

RESUMO

In this study, a simultaneous analytical method of tocols, γ-oryzanols, phytosterols, squalene, cholecalciferol and phylloquinone were developed using HPLC-DAD-FLD. The developed method allowed the quantification of 18 compounds in 30 min. Method validation showed linearity of calibration curves (α = 0.05). RSD of intra-day, inter-day and inter-laboratory precision were less than 4.88%. The limit of detections (LODs) and limit of quantifications (LOQs) were low (0.009-2.166 µg g-1) with recoveries around 96.0-102.9%. Results derived from the established method demonstrated a wide variation of detected compounds in rice bran and vegetable oil samples (22.4-1774.6 µg g-1 tocols, ND-26484 µg g-1 γ-oryzanols, ND-12655 µg g-1 phytosterols, ND-3189 µg g-1 squalene, ND-105.3 µg g-1 cholecalciferol, and ND-54.4 µg g-1 phylloquinone). Thus, the developed HPLC-DAD-FLD method is a powerful analytical tool for the above mentioned compounds useful in food and pharmaceutical application.


Assuntos
Oryza/química , Fitosteróis/análise , Óleos de Plantas/química , Colecalciferol/análise , Fenilpropionatos/análise , Esqualeno/análise , Vitamina K 1
9.
Food Chem ; 271: 639-649, 2019 Jan 15.
Artigo em Inglês | MEDLINE | ID: mdl-30236727

RESUMO

This work presents a metabolomics study of cork by gas chromatography-mass spectrometry (GC-MS) and 1H nuclear magnetic resonance (NMR) spectroscopy to characterize compounds susceptible to be extracted from cork by the wine in an attempt to find a relationship between the content of these compounds and the geographical origin of cork. Cork from eleven geographical regions was studied, five from Portugal and six from Spain. Unsupervised pattern recognition techniques unveiled three main clusters of regions according to their chemical similarity but not related with geographical proximity. Nineteen compounds were found to be responsible for the clusters, including terpenes (trans-squalene, friedelin, camphene, trans-3-pinanone, 1-terpinen-4-ol, two sesquiterpenes), polyphenols (vescalagin, castalagin), among others (pyrogallol, glucosan, sitost-4-en-3-one, o-cymene, quinic acid, five unknowns). These preliminary results unveiled the potential for a more efficient selection of cork planks for stoppers production based on the compounds susceptible to be extracted from cork by the wine.


Assuntos
Metabolômica/métodos , Compostos Orgânicos/metabolismo , Vinho/análise , Cromatografia Gasosa-Espectrometria de Massas , Oxirredução , Portugal , Espectroscopia de Prótons por Ressonância Magnética , Espanha
10.
J Ethnopharmacol ; 210: 275-286, 2018 Jan 10.
Artigo em Inglês | MEDLINE | ID: mdl-28859934

RESUMO

ETHNOPHARMACOLOGICAL RELEVANCE: Acacia nilotica (L.) Delile is used as a traditional anti-diabetic remedy in Bangladesh, Pakistan, Egypt, Nigeria and is mentioned in Ayurveda as well. AIM: The objective of the study was to evaluate the ethnomedicinal claim of A. nilotica leaf (ANL) extract for its efficiency in ameliorating diabetic complications. MATERIALS AND METHODS: ANL was orally administrated (50 and 200mg/kg) to alloxanized mice (blood glucose > 200mg/dL) for 20d. Parameters of glucose metabolism, hepatotoxicity, hyperlipidemia and nephrotoxicity were measured with emphasis on elevated oxidative stress. ANL was chemically characterized using GC-MS. Further, docking studies were employed to predict molecular interactions. RESULTS: ANL lowered (65%, P< 0.001) systemic glucose load in diabetic mice, which was otherwise 398% higher than control. ANL lowered (35%) insulin resistance, without any significant effect on insulin sensitivity (P> 0.05). Anti-hyperglycemic properties of ANL was further supported by lowering of HbA1c (34%; P< 0.001) and improved glucose utilization (OGTT). Overall diabetic complications were mitigated as reflected by lowered hepatic (ALT, AST) and renal (creatinine, BUN) injury markers and normalization of dyslipidemia. Elevated systemic oxidative stress was lowered by increased catalase and peroxidase activities in liver, kidney and skeletal muscle, resulting in 32% decrease of serum MDA levels. Apart from high phenolic and flavonoid content, tocopherol, catechol and ß-sitosterol, identified in ANL, demonstrated substantial binding affinity with Nrf2 protein (5FNQ) reflecting possible crosstalk with intracellular antioxidant defense pathways. CONCLUSION: The present study revealed the potentials of A. nilotica to alleviate diabetes-related systemic complications by limiting oxidative stress which justified the ethnopharmacological antidiabetic claim.


Assuntos
Acacia/química , Diabetes Mellitus Experimental/tratamento farmacológico , Resistência à Insulina , Extratos Vegetais/farmacologia , Administração Oral , Animais , Antioxidantes/metabolismo , Glicemia/efeitos dos fármacos , Diabetes Mellitus Experimental/complicações , Relação Dose-Resposta a Droga , Cromatografia Gasosa-Espectrometria de Massas , Hemoglobinas Glicadas/metabolismo , Hiperglicemia/tratamento farmacológico , Hipoglicemiantes/administração & dosagem , Hipoglicemiantes/farmacologia , Masculino , Medicina Tradicional , Camundongos , Simulação de Acoplamento Molecular , Estresse Oxidativo/efeitos dos fármacos , Extratos Vegetais/administração & dosagem , Folhas de Planta
11.
Food Chem ; 228: 301-314, 2017 Aug 01.
Artigo em Inglês | MEDLINE | ID: mdl-28317728

RESUMO

Proton Nuclear Magnetic Resonance (1H NMR) was employed to study monovarietal commercial Spanish extra-virgin olive oils (EVOO) (Arbequina, Arroniz, Cornicabra, Hojiblanca and Picual). Each sample was analyzed by a standard pulse and by an experiment suppressing the main lipid signals, enabling the detection of signals of minor components. The aim was to determine the possibilities of both 1H NMR approaches to characterize EVOO composition, focusing on acyl groups, squalene, sterols, triterpene acids/esters, fatty alcohols, wax esters and phenols (lignans, tyrosol, hydroxytyrosol, oleocanthal, oleacein, oleokoronal, oleomissional, ligstrodials and oleuropeindials), and to determine hydrolysis and oxidation levels. The signal assignments (in deuterated chloroform) are thoroughly described, identifying for the first time those of the protons of esters of phytol and of geranylgeraniol. Correct signal assignment is fundamental for obtaining sound results when interpreting statistical data from metabolomic studies of EVOO composition and adulteration, making it possible to differentiate and classify oils.


Assuntos
Olea/química , Azeite de Oliva/química , Óleos de Plantas/química , Espectroscopia de Prótons por Ressonância Magnética/métodos , Lignanas , Fenóis/análise
12.
Food Chem ; 221: 1135-1144, 2017 Apr 15.
Artigo em Inglês | MEDLINE | ID: mdl-27979070

RESUMO

The possibilities offered by a new methodology to determine minor components in edible oils are described. This is based on immersion of a solid-phase microextraction fiber of PDMS/DVB into the oil matrix, followed by Gas Chromatography/Mass Spectrometry. It enables characterization and differentiation of edible oils in a simple way, without either solvents or sample modification. This methodology allows simultaneous identification and quantification of sterols, tocols, hydrocarbons of different natures, fatty acids, esters, monoglycerides, fatty amides, aldehydes, ketones, alcohols, epoxides, furans, pyrans and terpenic oxygenated derivatives. The broad information provided by this methodology is useful for different areas of interest such as nutritional value, oxidative stability, technological performance, quality, processing, safety and even the prevention of fraudulent practices. Furthermore, for the first time, certain fatty amides, gamma- and delta-lactones of high molecular weight, and other aromatic compounds such as some esters derived from cinnamic acid have been detected in edible oils.


Assuntos
Análise de Alimentos/métodos , Óleos de Plantas/química , Óleos de Plantas/normas , Plantas Comestíveis/química , Compostos Orgânicos Voláteis/análise , Ácidos Graxos Voláteis/análise , Análise de Alimentos/instrumentação , Qualidade dos Alimentos , Cromatografia Gasosa-Espectrometria de Massas/métodos , Hidrocarbonetos/análise , Indicadores e Reagentes , Monoglicerídeos/análise , Fitosteróis/análise , Solventes , Tocoferóis/análise
13.
Fitoterapia ; 107: 100-104, 2015 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-26463755

RESUMO

The two new acylphloroglucinol derivatives, methylene-bis-aspidinol AB (1) and mallopposinol (2), together with the nine known compounds, aspidinol B (3), methylene-bis-aspidinol (4), (+)-α-tocopherol (5), lupeol (6), stigmasterol (7), phytol (8), bergenin (9), squalene (11) and methyl gallate (10) were isolated from the leaves of Mallotus oppositifolius. Their structures were elucidated by spectral analysis including MS, 1D and 2D-NMR spectroscopy. In vitro trypanocidal and antileishmanial activities of compounds 1-9 were evaluated. Mallopposinol (2) and aspidinol B (3) displayed weak antileishmanial activities against Leishmania donovani promastigotes, with EC50 values of 21.3 and 38.8µM, respectively. Only the methylene-bis-aspidinol (4) exhibited trypanocidal activity against Trypanosoma brucei brucei trypomastigotes (LC100=0.8µM) similar to the reference drug pentamidine (LC100=0.4µM).


Assuntos
Antiprotozoários/farmacologia , Leishmania donovani/efeitos dos fármacos , Mallotus (Planta)/química , Floroglucinol/farmacologia , Trypanosoma brucei brucei/efeitos dos fármacos , Antiprotozoários/isolamento & purificação , Concentração Inibidora 50 , Estrutura Molecular , Floroglucinol/isolamento & purificação , Extratos Vegetais/química , Folhas de Planta/química
14.
Food Chem ; 188: 459-66, 2015 Dec 01.
Artigo em Inglês | MEDLINE | ID: mdl-26041218

RESUMO

Two new commercially available high linolenic oils, pressed at low temperature from rose hip seeds, were characterised for their composition, quality and DPPH radical scavenging activity. The oxidative stability of oils was assessed using differential scanning calorimetry (DSC). Phytosterols, tocopherols and carotenoids contents were up to 6485.4; 1124.7; and 107.7 mg/kg, respectively. Phenolic compounds determined for the first time in rose hip oil totalled up to 783.55 µg/kg, with a predominant presence of p-coumaric acid methyl ester. Antiradical activity of the oils reached up to 3.00 mM/kg TEAC. The acid, peroxide and p-anisidine values as well as iron and copper contents indicated good quality of the oils. Relatively high protection against oxidative stress in the oils seemed to be a result of their high antioxidant capacity and the level of unsaturation of fatty acids.


Assuntos
Antioxidantes/análise , Varredura Diferencial de Calorimetria/métodos , Óleos de Plantas/análise , Óleos de Plantas/química , Rosa/química , Compostos de Bifenilo/química , Carotenoides/análise , Temperatura Baixa , Ácidos Graxos/análise , Oxirredução , Fenóis/análise , Fitosteróis/análise , Picratos/química , Óleos de Plantas/normas , Pressão , Sementes/química , Tocoferóis/análise
15.
Food Chem ; 175: 358-65, 2015 May 15.
Artigo em Inglês | MEDLINE | ID: mdl-25577092

RESUMO

Lens culinaris Medik (Leguminosae) is an annual, bushy and herbaceous plant cultivated globally for its edible seeds. A methanolic extract of the seeds contained four new antioxidant compounds, namely ß-sitosteryl-3-(2'-n-eicosanyloxy)-benzoate (3), n-octadec-9-enoyl-1-ß-D-glucurano-pyranoside (4) α-D-galactopyranosyl-(6 → 1')-α-D-galactopyranosyl-(6' → 1″)-α-D-galactopyranosyl-(6″ → 1‴)-α-d-galactopyranoside (5) and benzoyl-O-α-D-glucopyranosyl-(2a → 1b)-O-α-D-glucopyranosyl-(2b → 1c)-O-α-D-glucopyranosyl-(6c → 1d)-O-α-D-glucopyranosyl-(6d → 1e)-O-α-D-gluco-pyranoside (6) along with two known compounds n-heptadecanyl n-octadec-9-enoate (1) and ß-sitosterol (2) on the basis of chromatographic and spectral data analytical techniques. Compound 3 showed significant antioxidant activity compared to compounds 4, 5, and 6.


Assuntos
Antioxidantes/isolamento & purificação , Lens (Planta)/química , Sementes/química
16.
Int J Pharm ; 482(1-2): 38-46, 2015 Mar 30.
Artigo em Inglês | MEDLINE | ID: mdl-25448549

RESUMO

Gemcitabine is currently the most effective agent against advanced pancreatic cancer. However, the major therapeutic hurdles using gemcitabine include rapid inactivation by blood deaminases and fast development of cell chemoresistance, induced by down-regulation of deoxycytidine kinase or nucleoside transporters. To overcome the above drawbacks we designed recently a novel nanomedicine strategy based on squalenoyl prodrug of 5'-monophosphate gemcitabine (SQdFdC-MP). This amphiphilic conjugate self-organized in water into unilamellar vesicles with a mean diameter of 100 nm. In this study the antitumor efficacy of SQdFdC-MP nanoassemblies (NAs) on chemoresistant and chemosensitive pancreatic adenocarcinoma models have been investigated. Cell viability assays showed that SQdFdC-MP NAs displayed higher antiproliferative and cytotoxic effects, particularly in chemoresistant pancreatic tumor cells. In in vivo studies, SQdFdC-MP NAs decreased significantly the growth (∼70%) of human MiaPaCa2 xenografts, also preventing tumor cell invasion, whereas native dFdC did not display any anticancer activity when tumor growth inhibition was only 35% with SQdFdC NAs. These results correlated with a reduction of Ki-67 antigen and the induction of apoptosis mediated by caspase-3 activation in tumor cells. These findings demonstrated the feasibility of utilizing SQdFdC-MP NAs to make tumor cells more sensitive to gemcitabine and thus providing an efficient new therapeutic alternative for pancreatic adenocarcinoma.


Assuntos
Desoxicitidina/análogos & derivados , Nanomedicina/métodos , Nanopartículas/administração & dosagem , Nanopartículas/química , Neoplasias Pancreáticas/tratamento farmacológico , Pró-Fármacos/uso terapêutico , Esqualeno/análogos & derivados , Animais , Antimetabólitos Antineoplásicos/administração & dosagem , Antimetabólitos Antineoplásicos/química , Antimetabólitos Antineoplásicos/farmacologia , Antimetabólitos Antineoplásicos/uso terapêutico , Apoptose/efeitos dos fármacos , Linhagem Celular Tumoral , Sobrevivência Celular/efeitos dos fármacos , Desoxicitidina/administração & dosagem , Desoxicitidina/química , Desoxicitidina/farmacologia , Desoxicitidina/uso terapêutico , Feminino , Humanos , Antígeno Ki-67/efeitos dos fármacos , Camundongos , Nanopartículas/uso terapêutico , Nanopartículas/ultraestrutura , Invasividade Neoplásica , Neoplasias Pancreáticas/patologia , Pró-Fármacos/administração & dosagem , Pró-Fármacos/química , Pró-Fármacos/farmacologia , Esqualeno/administração & dosagem , Esqualeno/química , Esqualeno/farmacologia , Esqualeno/uso terapêutico , Ensaios Antitumorais Modelo de Xenoenxerto , Gencitabina
17.
J Ethnopharmacol ; 161: 128-37, 2015 Feb 23.
Artigo em Inglês | MEDLINE | ID: mdl-25498854

RESUMO

ETHNOPHARMACOLOGICAL RELEVANCE: Nerium oleander L. (syn. Nerium indicum Mill. and Nerium odorum Aiton.) is used for its anti-diabetic properties in Pakistan, Algeria, Morocco and is also recognized in Ayurveda. The present study was undertaken to investigate the anti-diabetic capacity of a standardized hydromethanolic extract of Nerium oleander in alloxan induced diabetes in mice. MATERIALS AND METHODS: Nerium oleander leaf extract (NOLE) was orally administered at 50 and 200mg/kg body weight (BW) dose to alloxanized mice (blood glucose >200mg/dl). After 20 consecutive days of treatment, various diabetic parameters were studied and compared with untreated mice. Furthermore, gas chromatography-mass spectrometry (GC-MS) and high performance liquid chromatography (HPLC) analysis was employed to reveal the phytochemical composition of the plant extract. RESULTS: NOLE demonstrated antihyperglycaemic activity by reducing 73.79% blood glucose level after 20 days of treatment. Oral glucose tolerance test (OGTT) revealed increase in glucose tolerance as evident by 65.72% decrease in blood glucose in 3h post treatment. Percentage decrease in different liver marker enzymes were significant along with decrease in triglyceride and cholesterol levels, displaying potent antihyperlipidemic activity. Peroxidase and catalase activity in liver, kidney and skeletal muscle were significantly restored besides marked reduction in lipid peroxidation and normalization of hepatic glycogen level in the NOLE treated alloxanized mice. Different bioactive phytocompounds with potent anti-diabetic activity were identified by GC-MS and HPLC analysis. CONCLUSION: The present investigation revealed that Nerium oleander possess potent anti-diabetic activity as claimed in different ethnopharmacological practices.


Assuntos
Diabetes Mellitus Experimental/tratamento farmacológico , Diabetes Mellitus Tipo 1/tratamento farmacológico , Hipoglicemiantes/uso terapêutico , Nerium , Fitoterapia , Extratos Vegetais/uso terapêutico , Argélia , Animais , Glicemia/análise , Catalase/metabolismo , Diabetes Mellitus Experimental/sangue , Diabetes Mellitus Experimental/metabolismo , Diabetes Mellitus Tipo 1/sangue , Diabetes Mellitus Tipo 1/metabolismo , Feminino , Hemoglobinas Glicadas/análise , Glicogênio/metabolismo , Hipoglicemiantes/farmacologia , Hipoglicemiantes/toxicidade , Insulina/sangue , Fígado/efeitos dos fármacos , Fígado/metabolismo , Masculino , Medicina Tradicional , Camundongos , Marrocos , Paquistão , Peroxidase/metabolismo , Extratos Vegetais/farmacologia , Extratos Vegetais/toxicidade , Folhas de Planta , Substâncias Reativas com Ácido Tiobarbitúrico/metabolismo , alfa-Amilases/antagonistas & inibidores , alfa-Amilases/metabolismo
18.
J Ethnopharmacol ; 159: 137-57, 2015 Jan 15.
Artigo em Inglês | MEDLINE | ID: mdl-25446604

RESUMO

ETHNOPHARMACOLOGICAL RELEVANCE: Acalypha is the fourth largest genus of the Euphorbiaceae family with approximately 450-570 species. Several Acalypha species are used as medicinal plants in Africa and in the Mascarene Islands. Almost every part of the plant including the leaves, stem and roots are used as traditional remedies to treat and manage a panoply of ailments. However, there is no updated compilation of traditionally important medicinal plants from the Acalypha genus. The present review therefore, endeavors to provide for the first time an updated compilation of documented ethnopharmacological information in relation to the ethnomedicinal, ethnoveterinary, zoopharmacognosy, phytochemistry and biological activities of medicinal plants from the Acalypha genus which can subsequently open new perspectives for further pharmacological research. MATERIALS AND METHODS: A literature search was performed on Acalypha species using ethnobotanical text books and scientific databases such as Pubmed, Scopus, EBSCO, Google Scholar and other web sources such as records from PROTA, PROSEA, and Botanical Dermatology Database. The Plant List, International Plant Name index and Kew Botanical Garden Plant name databases were used to validate scientific names. RESULTS AND DISCUSSION: Plants from Acalypha genus are traditionally used in the treatment and/or management of diverse ailments such as diabetes, jaundice, hypertension, fever, liver inflammation, schistosomiasis, dysentery, respiratory problems including bronchitis, asthma and pheumonia as well as skin conditions such as scabies, eczema and mycoses. Approximately 124 species were listed in ethnobotanical studies with some botanical description and others mentioned from different web sources. However, only 40 species have been included in the present review due to the unavailability of ethnopharmacological data on the remaining species. Among the 40 cited species, 30 were traditionally used for the treatment and/or management of approximately 70 human diseases or health conditions. Two species, Acalypha alnifolia and Acalypha fruticosa are used as insecticides and sand fly repellent respectively. Only 2 species (Acalypha fruticosa and Acalypha indica) are used in ethnoveterinary practice and have similar human and veterinary applications. In zoopharmacognosy, only Acalypha ornata has been mentioned. Natives from Africa, Central America, North America, Southern China, India, Bangladesh, Papua New Guinea and Mascarenes islands utilize Acalypha species as ethnomedicine. Traditionally used Acalypha species have been reported to possess at least one of the following biological activities: antimicrobial, anti-diabetic, antioxidant, anti-inflammatory, larvidal, pupicidal, hepatoprotective, anticancer, leishmanicidal, antihyperglycemic, antihypertensive, anti-venom, analgesic, anthelmintic, antiemetic, laxative, expectorant, diuretic, post-coital antifertility effects and wound healing. A total of 167 compounds have been identified from 19 species, with 16 from eight species were reported to be bioactive. CONCLUSION: The present review represents 32.3% of species from the Acalypha genus and can be considered as the first compilation of ethnopharmacologically useful plants from this genus. There is a great potential to discover new biologically active phytochemicals from the Acalypha genus because only few species have been studied comprehensively. Therefore, the clinical evaluation of species from this genus is warranted in future studies to confirm the ethnomedicinal claims and for the safety approval of therapeutic applications.


Assuntos
Acalypha , Plantas Medicinais , Acalypha/química , Etnofarmacologia , Humanos , Compostos Fitoquímicos/análise , Fitoterapia , Preparações de Plantas/uso terapêutico
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