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1.
Innov Food Sci Emerg Technol ; 83: 103218, 2023 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-36467515

RESUMO

Natural catastrophes include those of biological origin as the pandemic provoked by virus SARS CoV2, earthquakes, flooding and hurricanes among others, while provoked ones are mainly those related to wars and social movements. These situations may cause food shortage and challenge food safety and security systems. In this review, strategies to produce foods aimed to alleviate food needs before, during and after catastrophic conditions are described based on the supply of various processed, intermediate and low moisture foods and three categories of food supplies are depicted based on the nature of the adverse conditions, Also, relevant patents on on innovative food preparations and containers for disaster areas are discussed. Innovation to produce appropriate and nutritious foods for disaster zones may include food bags containing individual packages of high protein, high fiber/vitamins and carbohydrate/oils ingredients in dried/vitreous state. Additionally, the role of food structure on food preservation is mentioned in the context of ready to eat, nutritious and sensory acceptable food supplies during natural or provoked catastrophes is also reported.

2.
Int J Mol Sci ; 24(15)2023 Jul 29.
Artigo em Inglês | MEDLINE | ID: mdl-37569557

RESUMO

In this study, we present a complete set of electron scattering cross-sections from 1-Methyl-5-Nitroimidazole (1M5NI) molecules for impact energies ranging from 0.1 to 1000 eV. This information is relevant to evaluate the potential role of 1M5NI as a molecular radiosensitizers. The total electron scattering cross-sections (TCS) that we previously measured with a magnetically confined electron transmission apparatus were considered as the reference values for the present analysis. Elastic scattering cross-sections were calculated by means of two different schemes: The Schwinger multichannel (SMC) method for the lower energies (below 15 eV) and the independent atom model-based screening-corrected additivity rule with interferences (IAM-SCARI) for higher energies (above 15 eV). The latter was also applied to calculate the total ionization cross-sections, which were complemented with experimental values of the induced cationic fragmentation by electron impact. Double differential ionization cross-sections were measured with a reaction microscope multi-particle coincidence spectrometer. Using a momentum imaging spectrometer, direct measurements of the anion fragment yields and kinetic energies by the dissociative electron attachment are also presented. Cross-sections for the other inelastic channels were derived with a self-consistent procedure by sampling their values at a given energy to ensure that the sum of the cross-sections of all the scattering processes available at that energy coincides with the corresponding TCS. This cross-section data set is ready to be used for modelling electron-induced radiation damage at the molecular level to biologically relevant media containing 1M5NI as a potential radiosensitizer. Nonetheless, a proper evaluation of its radiosensitizing effects would require further radiobiological experiments.


Assuntos
Elétrons , Transporte de Elétrons , Fenômenos Físicos , Movimento (Física)
3.
Int J Mol Sci ; 22(9)2021 Apr 27.
Artigo em Inglês | MEDLINE | ID: mdl-33925653

RESUMO

Experimental results for the electron impact ionization of benzene, providing double (DDCS) and triple differential cross sections (TDCS) at the incident energy of 90 eV, measured with a multi-particle momentum spectrometer, are reported in this paper. The most intense ionization channel is assigned to the parent ion (C6H6+) formation. The DDCS values are presented for three different transferred energies, namely 30, 40 and 50 eV. The present TDCS are given for two fixed values of the ejected electron energy (E2), at 5 and 10 eV, and an electron scattering angle (θ1) of 10°. Different features related to the molecular orbitals of benzene from where the electron is extracted are observed. In addition, a semi-empirical formula to be used as the inelastic angular distribution function in electron transport simulations has been derived from the present DDCS result and compared with other expressions available in the literature.


Assuntos
Benzeno/química , Íons/química , Transporte de Elétrons/fisiologia , Elétrons , Íons/metabolismo , Fenômenos Físicos
4.
Plant Foods Hum Nutr ; 76(1): 12-19, 2021 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-33245465

RESUMO

High-sucrose high-fat diets are one of the causes of malnutrition, and may induce metabolic alterations such as dyslipidemia, insulin resistance, and adipogenesis. The objective of this work was to investigate the possible protective effect of traditionally edible avocado creole peel (Persea americana Mill var. drymifolia) when consuming a high-sucrose and fat diet (HSFD). The experimental animal model included 21 male Wistar rats divided in three groups: the control group received a standard diet of purina®, the HSFD group received a high fat diet plus 30% sucrose in drinking water, and finally the HSFD + AP group received the HSFD diet supplemented with 200 mg/kg of avocado peel for 14 weeks. It was observed that alterations included higher cholesterol, glucose, insulin, fatty acids and TNF-α levels as well as lower HDL, and adiponectin. The addition of avocado peel reverted some of these effects, resulting in normal values of triglicerides, insulin and adiponectin, while attenuated the levels of total cholesterol. Liver weight of the group added with avocado peel was similar to the control group. The neuronal density in the hippocampal areas CA1 and dentate gyrus DC were lower in the high glucose fat group, while the ingestion of the avocado peel showed a neuroprotective effect. The avocado creole ingestion reverted or attenuated most of the metabolic effects caused by a high-sucrose fat diet which was attributed to the compounds detected by HPLC-MS and GC-MS that included bioactive polyphenols such as flavanol quercetin, flavanone naringenin, flavan 3-ol catechin, cyanidin 3-glucoside, pelargonidin 3-glucoside, pelargonidin 3-rhamnoside, hydroxydelphinidin, eugenol and estragole.


Assuntos
Persea , Animais , Dieta Hiperlipídica/efeitos adversos , Suplementos Nutricionais , Masculino , Ratos , Ratos Wistar , Sacarose
5.
Int J Mol Sci ; 21(18)2020 Sep 22.
Artigo em Inglês | MEDLINE | ID: mdl-32971806

RESUMO

Electron scattering cross sections for pyridine in the energy range 0-100 eV, which we previously measured or calculated, have been critically compiled and complemented here with new measurements of electron energy loss spectra and double differential ionization cross sections. Experimental techniques employed in this study include a linear transmission apparatus and a reaction microscope system. To fulfill the transport model requirements, theoretical data have been recalculated within our independent atom model with screening corrected additivity rule and interference effects (IAM-SCAR) method for energies above 10 eV. In addition, results from the R-matrix and Schwinger multichannel with pseudopotential methods, for energies below 15 eV and 20 eV, respectively, are presented here. The reliability of this complete data set has been evaluated by comparing the simulated energy distribution of electrons transmitted through pyridine, with that observed in an electron-gas transmission experiment under magnetic confinement conditions. In addition, our representation of the angular distribution of the inelastically scattered electrons is discussed on the basis of the present double differential cross section experimental results.


Assuntos
Elétrons , Modelos Químicos , Piridinas/química , Transporte de Elétrons
6.
J Sci Food Agric ; 100(13): 4940-4949, 2020 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-32474932

RESUMO

BACKGROUND: Three yeast strains with probiotic potential, Hanseniaspora opuntiae, Pichia kudriavzevii, and Wickerhamomyces anomalus were inoculated in the fermentation of Guajillo chilli pepper (Capsicum annuum L.) sauce, and the different aroma profiles were investigated. Using headspace solid-phase microextraction-gas chromatography-mass spectrometry (HS-SPME-GC-MS) analysis and gas chromatography-olfactometry (GCO), flavour compound production was evaluated during the fermentation of the Guajillo chilli pepper sauces. RESULTS: A total of 78 volatile compounds were identified during the yeast fermentation of the sauce. Most aldehydes and terpenes detected were present at the beginning of the fermentation, indicating a Guajillo chilli pepper origin. Among the 34 active aroma compounds detected by GCO, propanoic acid (cheesy), 3-methylbutanoic acid (sharp, cheese), ethyl 2-methylbutanoate (fruity), and 6-methyl-5-hepten-2-one (strong, citrus) were identified as key aroma contributors produced by the inoculation of the yeasts. A different aroma profile was produced by probiotic yeast. Hanseniaspora opuntiae produced an aroma profile with herbal and green notes based on high production of aldehydes, ketones, and acetic acid. Pichia kudriavzevii and W. anomalus produced fruity, green-herbal, and cheesy notes based on ester compounds, alcohol and branched-chain acids production although, the production of propanoic acid by W. anomalus increased the cheesy character in the sauces. CONCLUSION: The aroma profile of fermented chilli pepper sauces depends not only on the chili pepper varieties used but also on the fermentation process as a source of aroma compounds. The use of probiotic yeast can be used to improve and diversify the aroma profile of fermented chilli pepper sauces. © 2020 Society of Chemical Industry.


Assuntos
Capsicum/microbiologia , Alimentos Fermentados/microbiologia , Hanseniaspora/metabolismo , Odorantes/análise , Pichia/metabolismo , Probióticos/análise , Saccharomycetales/metabolismo , Produtos Vegetais/microbiologia , Capsicum/química , Fermentação , Alimentos Fermentados/análise , Aromatizantes/química , Aromatizantes/metabolismo , Cromatografia Gasosa-Espectrometria de Massas , Humanos , Olfatometria , Paladar , Produtos Vegetais/análise , Compostos Orgânicos Voláteis/química , Compostos Orgânicos Voláteis/metabolismo
7.
Drug Dev Res ; 79(7): 362-369, 2018 11.
Artigo em Inglês | MEDLINE | ID: mdl-30276837

RESUMO

Painful peripheral neuropathy can be associated with nerve damage caused by diabetes mellitus. Although pregabalin is the first-line therapy for peripheral neuropathy, it shows substantial discontinuation rates, mainly because of nervous system side effects as motor incoordination. Multimodal therapy may improve the motor side effect profile of pregabalin. The aim of this study was to evaluate the interaction of pregabalin + thioctic acid or pregabalin + α-tocopherol on allodynia and motor performance in neonatal streptozotocin-induced diabetic rats. Efficacy of drugs separately or in combination was tested by tactile allodynia using von Frey filaments. Isobolographic and interaction index analysis were used to determine the antiallodynic interaction between pregabalin and either thioctic acid or α-tocopherol. Motor performance was measured using a rotarod test. Pregabalin, thioctic acid, and α-tocopherol reduced, in a dose-dependent fashion, tactile allodynia. Pregabalin + thioctic acid and pregabalin + α-tocopherol combinations also dose-dependently reduced allodynic behavior in diabetic rats. Isobolographic analysis revealed an additive interaction for both combinations. Consistently, the interaction indices confirmed the additive effect between pregabalin + thioctic acid and pregabalin + α-tocopherol. In addition, the administration of either combination improved motor incoordination induced by pregabalin. Data suggests that thioctic acid or α-tocopherol could positively impact the therapeutic profile of pregabalin, because they might be useful for reducing motor incoordination associated to pregabalin in patients with peripheral neuropathy.


Assuntos
Analgésicos/administração & dosagem , Diabetes Mellitus Experimental/tratamento farmacológico , Hiperalgesia/tratamento farmacológico , Pregabalina/administração & dosagem , Desempenho Psicomotor/efeitos dos fármacos , Ácido Tióctico/administração & dosagem , alfa-Tocoferol/administração & dosagem , Animais , Animais Recém-Nascidos , Antioxidantes/administração & dosagem , Diabetes Mellitus Experimental/fisiopatologia , Relação Dose-Resposta a Droga , Quimioterapia Combinada , Hiperalgesia/fisiopatologia , Desempenho Psicomotor/fisiologia , Ratos , Ratos Wistar
8.
Plant Foods Hum Nutr ; 69(1): 18-24, 2014 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-24249159

RESUMO

The objective of this study was to evaluate the effect of reduced-calorie avocado paste on lipid serum profile, insulin sensitivity, and hepatic steatosis in rats fed a hypercholesterolemic-high fructose diet. Thirty five male Wistar rats were randomly separated in five groups: Control group (ground commercial diet); hypercholesterolemic diet plus 60% fructose solution (HHF group); hypercholesterolemic diet plus 60% fructose solution supplemented with avocado pulp (HHF+A group); hypercholesterolemic diet plus 60% fructose solution supplemented with reduced-calorie avocado paste (HHF+P group); and hypercholesterolemic diet plus 60% fructose solution supplemented with a reduced-calorie avocado paste plus fiber (HHF+FP group). The A, P, and FP were supplemented at 2 g/kg/d. The study was carried out for seven weeks. Rats belonging to the HHF group exhibited significantly (P ≤ 0.05) higher total cholesterol, triglycerides, and insulin levels in serum as well as lower insulin sensitivity than the control group. Supplementation with reduced-calorie avocado paste showed a significant (P ≤ 0.05) decrease in total cholesterol (43.1%), low-density lipoprotein (45.4%), and triglycerides (32.8%) in plasma as well as elevated insulin sensitivity compared to the HHF group. Additionally, the liver enzymes alanine aminotransferase and aspartate aminotransferase decreased significantly in the HHF-P group (39.8 and 35.1%, respectively). These results are likely due to biocompounds present in the reduced-calorie avocado paste, such as polyphenols, carotenoids, chlorophylls, and dietary fibre, which are capable of reducing oxidative stress. Therefore, reduced-calorie avocado paste attenuates the effects of a hypercholesterolemic-high fructose diet in rats.


Assuntos
Colesterol na Dieta/metabolismo , Fígado Gorduroso/metabolismo , Frutose/metabolismo , Resistência à Insulina , Insulina/sangue , Lipídeos/sangue , Persea/química , Alanina Transaminase/sangue , Animais , Antioxidantes/farmacologia , Antioxidantes/uso terapêutico , Aspartato Aminotransferases/sangue , Colesterol na Dieta/administração & dosagem , Colesterol na Dieta/efeitos adversos , Dieta/efeitos adversos , Carboidratos da Dieta/administração & dosagem , Carboidratos da Dieta/efeitos adversos , Carboidratos da Dieta/metabolismo , Suplementos Nutricionais , Fígado Gorduroso/etiologia , Fígado Gorduroso/prevenção & controle , Frutose/administração & dosagem , Frutose/efeitos adversos , Frutas/química , Fígado/efeitos dos fármacos , Fígado/enzimologia , Fígado/metabolismo , Masculino , Estresse Oxidativo , Extratos Vegetais/farmacologia , Extratos Vegetais/uso terapêutico , Ratos , Ratos Wistar
9.
J Biomed Biotechnol ; 2012: 524019, 2012.
Artigo em Inglês | MEDLINE | ID: mdl-23091348

RESUMO

Carotenoids extracted from dried peppers were evaluated for their antioxidant, analgesic, and anti-inflammatory activities. Peppers had a substantial carotenoid content: guajillo 3406 ± 4 µg/g, pasilla 2933 ± 1 µg/g, and ancho 1437 ± 6 µg/g of sample in dry weight basis. A complex mixture of carotenoids was discovered in each pepper extract. The TLC analysis revealed the presence of chlorophylls in the pigment extract from pasilla and ancho peppers. Guajillo pepper carotenoid extracts exhibited good antioxidant activity and had the best scavenging capacity for the DPPH(+) cation (24.2%). They also exhibited significant peripheral analgesic activity at 5, 20, and 80 mg/kg and induced central analgesia at 80 mg/kg. The results suggest that the carotenoids in dried guajillo peppers have significant analgesic and anti-inflammatory benefits and could be useful for pain and inflammation relief.


Assuntos
Capsicum/química , Carotenoides/administração & dosagem , Edema/tratamento farmacológico , Percepção da Dor/efeitos dos fármacos , Extratos Vegetais/administração & dosagem , Analgésicos/administração & dosagem , Animais , Anti-Inflamatórios/administração & dosagem , Antioxidantes/administração & dosagem , Dessecação , Edema/diagnóstico , Masculino , Camundongos , Resultado do Tratamento
10.
J Biomed Biotechnol ; 2012: 873090, 2012.
Artigo em Inglês | MEDLINE | ID: mdl-22665993

RESUMO

The genus Capsicum provides antioxidant compounds, such as phenolics and carotenoids, into the diet. In Mexico, there is a wide diversity of species and varieties of chilli peppers, a fruit which has local cultural and gastronomic importance. In the present study, the relationship of the carotenoid and phenolic profiles with the RAPD fingerprint of three different commercial cultivars of chilli peppers of seven regions of Mexico was investigated. Through RAPD, the species of chilli were differentiated by means of different primers (OPE-18, MFG-17, MFG-18, C51, and C52). The genetic distance found with OPE 18 was in the order of 2.6. The observed differences were maintained when the chromatographic profile of carotenoids, and the molecular markers were analyzed, which suggest a close relationship between carotenoids and the genetic profile. While the chromatographic profile of phenols and the molecular markers were unable to differentiate between genotypes of chilli peppers. In addition, by using infrared spectroscopy and statistical PCA, differences explained by geographic origin were found. Thus, this method could be an alternative for identification of chilli species with respect to their geographic origin.


Assuntos
Capsicum/química , Capsicum/genética , DNA de Plantas/química , Frutas/química , Frutas/genética , Agricultura , Biomarcadores/análise , Biomarcadores/química , Capsicum/metabolismo , Carotenoides/análise , Carotenoides/química , Carotenoides/metabolismo , Análise por Conglomerados , Frutas/metabolismo , Marcadores Genéticos/genética , México , Fenóis/análise , Fenóis/química , Fenóis/metabolismo , Análise de Componente Principal , Técnica de Amplificação ao Acaso de DNA Polimórfico
11.
J Sci Food Agric ; 92(13): 2715-20, 2012 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-22522234

RESUMO

BACKGROUND: Some phenolic compounds, such as ferulic acid and p-coumaric acid, exist in the form of free acids, in fruits, rice, corn and other grains. Thermal treatment (121 °C at 15-17 psi) for different times on ferulic, p-coumaric and cinnamic acids as well as equimolar mixtures of these acids was investigated. RESULTS: Ferulic and p-coumaric acids underwent decarboxylation, yielding dimeric products formed through their corresponding radical intermediates, while cinnamic acid was recovered unreacted. High-performance liquid chromatography analysis showed no cross-dimerization when equimolar mixtures of pairs of hydroxycinnamic acids were treated under the same conditions. Dimers were characterized as (E)-4',4″-(but-1-ene-1,3-diyl)bis(2'-methoxyphenol)) (dimer of 4-vinylguaiacol) and (E)-4,4'-(but-1-ene-1,3-diyl)diphenol) (dimer of 4-vinylphenol) by nuclear magnetic resonance and mass spectrometry. CONCLUSION: Sterilization by thermal processing produced dimers of ferulic and coumaric acid. The antioxidant activity of these dimers was greater than that of the respective hydroxycinnamic acids. These results may be relevant for fruits and grains that contain hydroxycinnamic acids and undergo sterilization processes such as canning.


Assuntos
Antioxidantes , Cinamatos , Ácidos Cumáricos , Dimerização , Grão Comestível/química , Frutas/química , Temperatura Alta , Antioxidantes/química , Antioxidantes/farmacologia , Cinamatos/química , Cinamatos/farmacologia , Ácidos Cumáricos/química , Ácidos Cumáricos/farmacologia , Espectroscopia de Ressonância Magnética , Espectrometria de Massas , Oryza/química , Propionatos , Sementes/química , Esterilização , Zea mays/química
12.
J Food Biochem ; 46(7): e14139, 2022 07.
Artigo em Inglês | MEDLINE | ID: mdl-35348225

RESUMO

Amaranthus hypochondriacus L. is a pseudocereal with nutritional properties. Some bioactive peptides have been identified from amaranth protein isolates. The metabolic reactions developed during seed germination have produced different functional foods. The present research aimed to develop a non-dairy germinated amaranth-based functional beverage fermented by Lactiplantibacillus plantarum (LP) strain using Lacticaseibacillus casei Shirota (LCS) as control. The content of betalains (BT), total phenolic compounds (TFC), antioxidant capacity (DPPH, ABTS, FRAP), color changes, and scavenging bioactive peptides were determined. BT in the original base was significantly increased after fermentation by LP and LCS (from 1.276 ± 0.030 to 2.732 ± 0.196 and 1.904 ± 0.760 mg/100 ml, respectively). TFC increased after fermentation; however, no significant differences were found between the two strains (p > .05). The fermentation did not decrease the antioxidant content of the germinated amaranth base. However, a slight increase in the antioxidant capacity was found by DPPH, ABTS, and FRAP in the beverage fermented by LP compared with the LCS one. Moreover, the peptidomic approach suggested 18 peptides with scavenging activity. Thus, a bioactive food product with antioxidant properties was obtained by germination of A. hypochondriacus and its subsequent fermentation by LP. PRACTICAL APPLICATIONS: Non-dairy fermented beverages are novel carriers for probiotics and beneficial metabolites. This research evaluated the antioxidant and hypoglycemic activity of a fermented drink made with amaranth (Amaranthus hypochondriacus) and a potential probiotic strain (Lactiplantibacillus plantarum). The results led to conclude that it is possible to develop functional drinks with potential antioxidant and hypoglycemic activities and provide the biochemical basis for further research and development.


Assuntos
Amaranthus , Lacticaseibacillus casei , Amaranthus/química , Antioxidantes/química , Bebidas , Hipoglicemiantes/farmacologia , Peptídeos
13.
Analyst ; 136(16): 3355-65, 2011 Aug 21.
Artigo em Inglês | MEDLINE | ID: mdl-21709857

RESUMO

A fast and simple screening method for the determination of clenbuterol at the ppb level in a murine model was demonstrated by Mid Infrared (MIR) and Raman spectroscopy in conjunction with multivariate analysis. In order to build the calibration models to quantify clenbuterol in rat meat, mixtures of rat meat and clenbuterol were prepared in a range of 5-10,000 ppb. Partial Least Square (PLS) analysis was used to build the calibration model. The results shown that Mid Infrared and Raman spectroscopy were efficient, but Mid Infrared (R(2) = 0.966 and SEC = 0.27) were superior to Raman (R(2) = 0.914 and SEC = 1.167). The SIMCA model developed showed 100% classification rate of rat meat samples with or without clenbuterol. The results were confirmed with contaminated meat samples from animals treated with clenbuterol. Chemometric models represent an attractive option for meat quality screening without sample pretreatments which can identify veterinary medicinal products at the ppb level.


Assuntos
Clembuterol/análise , Espectroscopia de Infravermelho com Transformada de Fourier/métodos , Análise Espectral Raman/métodos , Animais , Masculino , Modelos Animais , Análise Multivariada , Músculos/química , Análise de Componente Principal , Ratos , Ratos Wistar
14.
BMJ Case Rep ; 14(9)2021 Sep 13.
Artigo em Inglês | MEDLINE | ID: mdl-34518180

RESUMO

Primary central nervous system lymphoma (PCNSL) is infrequent and often poses diagnostic conundrums due to its protean manifestations. We present the case of a South Asian young man presenting with raised intracranial pressure and a lymphocytic cerebrospinal fluid (CSF) with pronounced hypoglycorrhachia. Progression of the neuro-ophthalmic signs while on early stages of antitubercular treatment led to additional investigations that produced a final diagnosis of primary leptomeningeal lymphoma. Treatment with chemoimmunotherapy (methotrexate, cytarabine, thiotepa and rituximab (MATRix)) achieved full radiological remission followed by successful autologous transplant. This case highlights the difficulties and diagnostic dilemmas when PCNSL presents as a chronic meningeal infiltrative process. While contextually this CSF is most often indicative of central nervous system tuberculosis and justifies empirical treatment initiation alone, it is essential to include differential diagnoses in the investigation work-up, which also carry poor prognosis without timely treatment. High suspicion, multidisciplinary collaboration and appropriate CSF analysis were the key for a correct diagnosis.


Assuntos
Neoplasias do Sistema Nervoso Central , Linfoma não Hodgkin , Tuberculose Meníngea , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Neoplasias do Sistema Nervoso Central/tratamento farmacológico , Humanos , Linfoma não Hodgkin/tratamento farmacológico , Masculino , Tiotepa/uso terapêutico , Tuberculose Meníngea/diagnóstico
15.
J Pers Med ; 11(12)2021 Dec 12.
Artigo em Inglês | MEDLINE | ID: mdl-34945825

RESUMO

The efficacy of anti-obesity drugs usually does not consider the high degree of interindividual variability in responses to the drug which could affect the decision to withdraw the drug early due to ineffectiveness or to continue therapy according to specific expectations of success. The aim of this study was to analyze body weight loss in kilograms during the first month (1 mo-BWLkg) of treatment with 30 mg phentermine and development of tolerance to phentermine, on its 6-month efficacy. One hundred sixty-six subjects with obesity were individually or jointly analyzed in the study. Subjects with 1 mo-BWLkg of <1 kg, 1-3 kg, 3-5 kg, and ≥5 kg reached 6-month mean percentage body weight reductions (BWR%) of approximately 3%, 5%, 10%, and 15%, respectively. Development of late tolerance (4-6 months) to phentermine had a lower impact than early tolerance (2-3 months). Subjects with 1 mo-BWLkg < 3 kg who developed early tolerance did not achieve relevant BWR% (≥5%) at month 6, while the rest of the subgroups achieved increasing and progressive BWR%, according to their 1 mo-BWLkg range and time of onset of tolerance. The 1 mo-BWLkg and development of tolerance to phentermine could be useful to predict the expected 6-month efficacy trends in obese patients treated with 30 mg phentermine.

16.
Biomolecules ; 9(8)2019 07 25.
Artigo em Inglês | MEDLINE | ID: mdl-31349731

RESUMO

A large amount of chemicals are released to the environment each year. Among them, bisphenol A (BPA) is of utmost concern since it interferes with the reproductive system of wild organisms due to its capacity to bind to hormone receptors. Additionally, BPA epigenotoxic activity is known to affect basic processes during embryonic life. However, its effects on primordial germ cells (PGCs) proliferation and migration, both mechanisms being crucial for gametogenesis, remain unknown. To investigate the effects of BPA on PGCs migration and eventual testicle development, zebrafish embryos were exposed to 100, 2000 and 4000 µg/L BPA during the first 24 h of development. Vasa immunostaining of PGCs revealed that exposure to 2000 and 4000 µg/L BPA impaired their migration to the genital ridge. Two pivotal genes of PGCs migration (cxcr4b and sdf1a) were highly dysregulated in embryos exposed to these doses, whereas DNA methylation and epigenetic marks in PGCs and their surrounding somatic cells were not altered. Once embryos reached adulthood, the morphometric study of their gonads revealed that, despite the reduced number of PGCs which colonized the genital ridges, normal testicles were developed. Although H3K9ac decreased in the sperm from treated fishes, it did not affect the progeny development.


Assuntos
Compostos Benzidrílicos/farmacologia , Células Germinativas Embrionárias/citologia , Fertilidade/efeitos dos fármacos , Fenóis/farmacologia , Peixe-Zebra/embriologia , Animais , Cruzamento , Movimento Celular/efeitos dos fármacos , Quimiocina CXCL12/genética , Células Germinativas Embrionárias/efeitos dos fármacos , Epigênese Genética/efeitos dos fármacos , Regulação da Expressão Gênica no Desenvolvimento/efeitos dos fármacos , Masculino , Receptores CXCR4/genética , Testículo/efeitos dos fármacos , Testículo/crescimento & desenvolvimento , Peixe-Zebra/genética , Proteínas de Peixe-Zebra/genética
17.
Br J Ophthalmol ; 100(1): 98-104, 2016 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-26209586

RESUMO

BACKGROUND: Methylmalonic acidemia (MMA) and propionic acidemia (PA) are rare hereditary disorders of protein metabolism, manifesting early in life with ketoacidosis and encephalopathy and often resulting in chronic complications. Optic neuropathy (ON) has been increasingly recognised in both conditions, mostly through isolated case reports or small cases series. We here report the clinical features and visual outcomes of a case series of paediatric patients with a diagnosis of MMA or PA. METHODS: Retrospective observational case series. A database of patients attending the Willink Biochemical Genetics unit in Manchester was interrogated. Fifty-three patients had a diagnosis of either isolated MMA or PA, of which 12 had been referred for ophthalmic review. RESULTS: Seven patients had clinical findings compatible with ON. Visual outcomes in these patients were poor, with slow clinical progression or stability over time in five cases with follow-up. Presentation was acute in a context of metabolic crisis in two of the cases. Four patients with ON had electrodiagnostics showing absent pattern evoked potentials, with one showing a preserved flash response. All four showed marked attenuation of the dark-adapted electroretinogram with better preservation of the light-adapted response. CONCLUSIONS: Our study suggests that ON is under-reported in patients with MMA and PA. Clinical presentation can be acute or insidious, and episodes of acute metabolic decompensation appear to trigger visual loss. Photoreceptor involvement may coexist. Active clinical surveillance of affected patients is important as comorbidities and cognitive impairment may delay diagnosis.


Assuntos
Erros Inatos do Metabolismo dos Aminoácidos/complicações , Doenças do Nervo Óptico/etiologia , Acidemia Propiônica/complicações , Adolescente , Criança , Eletrorretinografia , Potenciais Evocados Visuais , Feminino , Humanos , Masculino , Disco Óptico/patologia , Doenças do Nervo Óptico/diagnóstico , Tomografia de Coerência Óptica
18.
Oncotarget ; 7(13): 16855-65, 2016 Mar 29.
Artigo em Inglês | MEDLINE | ID: mdl-26942874

RESUMO

Vaccination with dendritic cells (DCs) is proposed to induce lasting responses against melanoma but its survival benefit in patients needs to be demonstrated. We propose a DC-targeted vaccine loaded with a Listeria peptide with exceptional anti-tumour activity to prevent metastasis of melanoma. Mice vaccinated with vaccines based on DCs loaded with listeriolysin O peptide (91-99) (LLO91-99) showed clear reduction of metastatic B16OVA melanoma size and adhesion, prevention of lung metastasis, enhanced survival, and reversion of immune tolerance. Robust innate and specific immune responses explained the efficiency of DC-LLO91-99 vaccines against B16OVA melanoma. The noTable features of this vaccine related to melanoma reduction were: expansion of immune-dominant LLO91-99-specific CD8 T cells that helped to expand melanoma-specific CD8+ T cells; high numbers of tumour-infiltrating lymphocytes with a cytotoxic phenotype; and a decrease in CD4+CD25high regulatory T cells. This vaccine might be a useful alternative treatment for advanced melanoma, alone or in combination with other therapies.


Assuntos
Toxinas Bacterianas/farmacologia , Vacinas Anticâncer/farmacologia , Células Dendríticas/imunologia , Proteínas de Choque Térmico/farmacologia , Proteínas Hemolisinas/farmacologia , Melanoma Experimental/patologia , Neoplasias Cutâneas/patologia , Animais , Toxinas Bacterianas/imunologia , Linfócitos T CD8-Positivos/efeitos dos fármacos , Linfócitos T CD8-Positivos/imunologia , Vacinas Anticâncer/imunologia , Proteínas de Choque Térmico/imunologia , Proteínas Hemolisinas/imunologia , Linfócitos do Interstício Tumoral/efeitos dos fármacos , Linfócitos do Interstício Tumoral/imunologia , Melanoma Experimental/imunologia , Camundongos , Neoplasias Cutâneas/imunologia
19.
Am J Ophthalmol ; 140(6): 1161-3, 2005 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-16376679

RESUMO

PURPOSE: To evaluate the safety and efficacy of perfluorocarbon-perfused vitrectomy (PCPV) as a novel technique in obtaining a large undiluted vitreous biopsy. DESIGN: Cross-sectional interventional study. METHODS: Patients with undiagnosed posterior uveitis scheduled for vitreous biopsy underwent PCPV. A syringe containing 5 ml of perfluorocarbon liquid (PCL) was connected to the infusion line. Aspiration of the central and superior vitreous was initiated with simultaneous infusion of the PCL. RESULTS: Twenty eyes of 20 patients were included in this study. The mean +/- SD amount of PCL used in each eye was 4.50 +/- 0.69 ml. The volume of vitreous sample obtained in each eye was 2.25 +/- 0.413 ml. No complications occurred. CONCLUSIONS: PCPV is a safe and effective method for obtaining large undiluted vitreous biopsy.


Assuntos
Biópsia por Agulha/métodos , Fluorocarbonos/administração & dosagem , Uveíte Posterior/patologia , Vitrectomia/métodos , Corpo Vítreo/patologia , Adulto , Estudos Transversais , Drenagem/métodos , Humanos , Pessoa de Meia-Idade
20.
Recent Pat Biotechnol ; 9(3): 158-67, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-27316220

RESUMO

BACKGROUND: Patents on phytochemicals are being registered worldwide. Such phytochemicals provide benefits to human health, and include terpenoids, phenolic compounds, alkaloids, lignin, and fiber. OBJECTIVE: This review has the purpose to provide a comprehensive overview of patents published in the last five years about extraction of phytochemicals and their application in the food and pharmaceutical industry. METHOD: Forty eight pa- tents were analyzed and classified in four topics of interest; 1) Extraction, 2) Functional foods, 3) Biological activity, and 4) Prevention of diseases. RESULTS: Extraction yield of phytochemicals is the critical step. The techniques to extract phytochemicals include enzymat- ic hydrolysis, nano-particulate precipitation, salts formation and combination of solvents; however, the use of ultrasound and microwave is increasing. Patents concerning functional foods include pediatric formulations, sport drink, and compo- sitions that produce beneficial effects. Biological activity of plant extracts tested in animals or cell cultures, as antioxidant, anti-inflammatory, anticancer activity, reduction of obesity and diabetes are presented in this review. Application of phy- tochemicals in the prevention and treatment of health disorders, such as diabetes, gastritis, enteritis, topical inflammation, macular degeneration, gingivitis, prostatic hyperplasia, urinary impairments. CONCLUSION: Patents revised include 30% methodologies for extraction of phytochemicals, 16% application of phytochem- icals in food matrixes to obtain functional foods, 18% biological activity of extracts or compounds and 36% application in the prevention and treatment of illness, which reveals a great interest to protect intellectual property concerning applica- tion of phytochemicals formulations for human health.


Assuntos
Compostos Fitoquímicos/química , Compostos Fitoquímicos/uso terapêutico , Indústria Farmacêutica/métodos , Indústria Alimentícia/métodos , Humanos , Patentes como Assunto , Extratos Vegetais/química , Extratos Vegetais/uso terapêutico
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