Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 43
Filtrar
Mais filtros

Medicinas Complementares
Tipo de documento
Intervalo de ano de publicação
1.
PLoS One ; 17(9): e0273806, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-36054189

RESUMO

Religious institutions have been responsive to the needs of Black men and other marginalized populations. Religious service attendance is a common practice that has been associated with stress management and extended longevity. The objective of this study was to examine the relationship between religious service attendance and all-cause mortality among Black men 50 years of age and older. Data for this study were from NHANES III (1988-1994). The analytic sample (n = 839) was restricted to participants at least 50 years of age at the time of interview who self-identified as Black and male. Mortality was the primary outcome for this study and the NHANES III Linked Mortality File was used to estimate race-specific, non-injury-related death rates using a probabilistic matching algorithm, linked to the National Death Index through December 31, 2015, providing up to 27 years follow-up. The primary independent variable was religious service attendance, a categorical variable indicating that participants attended religious services at least weekly, three or fewer times per month, or not at all. The mean age of participants was 63.6±0.3 years and 36.4% of sample members reported that they attended religious services one or more times per week, exceeding those attending three or fewer times per month (31.7%), or not at all (31.9%). Cox proportional hazard logistic regression models were estimated to determine the association between religious service attendance and mortality. Participants with the most frequent religious service attendance had a 47% reduction of all-cause mortality risk compared their peer who did not attend religious services at all (HR 0.53, CI 0.35-0.79) in the fully adjusted model including socioeconomic status, non-cardiovascular medical conditions, health behaviors, social support and allostatic load. Our findings underscore the potential salience of religiosity and spirituality for health in Black men, an understudied group where elevated risk factors are often present.


Assuntos
Religião , Espiritualidade , População Negra , Humanos , Masculino , Pessoa de Meia-Idade , Mortalidade , Inquéritos Nutricionais , Inquéritos e Questionários
2.
J Pain Symptom Manage ; 61(1): 32-41.e2, 2021 01.
Artigo em Inglês | MEDLINE | ID: mdl-32711122

RESUMO

CONTEXT: Psychological distress is associated with adverse health outcomes in serious illness and magnified among patients of low socioeconomic status. Aspects of one's culture, such as religion and spirituality, can influence these patients' coping response to distress. Advanced chronic kidney disease (CKD) is a serious illness that disproportionately affects patients of low socioeconomic status, but a theory-based understanding of this group's lived experience of CKD is lacking. OBJECTIVES: We explored the cognitions, emotions, and coping behaviors of patients with CKD with emphasis on those of low socioeconomic status. We further inquired into any influences of religion or spirituality. METHODS: We interviewed 50 English-speaking or Spanish-speaking adults with advanced CKD from three medical centers in Nashville, Tennessee. Analyses occurred with isolation of themes; development of a coding system; and creation of a conceptual framework using an inductive-deductive approach. RESULTS: Median age was 65 years; median annual income was $17,500 per year; and 48% of participants had not progressed beyond high school. Key beliefs (awareness of mortality and lack of control) influenced patients' emotions (existential distress in the form of death anxiety, prognostic uncertainty, and hopelessness) and coping behaviors (acceptance, avoidance, emotion regulation via spirituality, and seeking socialsupport via a religious community). CONCLUSION: Individuals with advanced CKD and low socioeconomic status lack control over disease progression, experience death anxiety and existential distress, and emphasize spirituality to cope. Our study identifies novel components for a psychotherapeutic intervention for patients with advanced CKD at high risk for adverse health outcomes.


Assuntos
Adaptação Psicológica , Insuficiência Renal Crônica , Adulto , Idoso , Humanos , Pesquisa Qualitativa , Religião , Insuficiência Renal Crônica/terapia , Espiritualidade
3.
Cancer Control ; 27(3): 1073274820936288, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32638611

RESUMO

Prostate cancer is a significant impediment in men's lives as this condition often exacerbates stress and reduces quality of life. Faith can be a resource through which men cope with health crises; however, few studies examine how religion or spirituality can have implications for racial disparities in health outcomes among men. The purpose of this study is to assess the associations between religious coping and quality of life among black and white men with prostate cancer. Data for this investigation were drawn from the Diagnosis and Decisions in Prostate Cancer Treatment Outcomes Study that consisted of 624 black and white men with complete information on the primary outcome and predictor variables. The primary outcome for this study was overall quality of life as measured by the Functional Assessment of Cancer Therapy-Prostate questionnaire. The main independent variable was religious coping measured by 2 subscales capturing positive and negative forms of coping. Black men in the study had lower overall quality of life scores (134.6 ± 19.6) than their white peers (139.8 ± 14.1). Black men in the sample also had higher average positive religious coping scores (12.9 ± 3.3) than white men (10.3 ± 4.5). Fully adjusted linear regression models of the total sample produced results indicating that positive religious coping was correlated with an increase in quality of life (ß = .38, standard error [SE] = 0.18, P < .05). Negative religious coping was associated with a reduction in quality of life (ß = -1.48, SE = 0.40, P < .001). Faith-oriented beliefs or perceptions can have implications for quality of life among men with prostate cancer. Sensitivity to the role of religion, spirituality, and faith should be seen by providers of health care as potential opportunities for improved outcomes in patients with prostate cancer and survivors.


Assuntos
Adaptação Psicológica , Neoplasias da Próstata/etnologia , Neoplasias da Próstata/psicologia , Qualidade de Vida , Religião , Negro ou Afro-Americano , Idoso , Disparidades nos Níveis de Saúde , Humanos , Masculino , Pessoa de Meia-Idade , Espiritualidade , População Branca
4.
Nat Prod Res ; 34(1): 46-52, 2020 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-30822145

RESUMO

This study was designed to establish the most effective solvent/technique for extracting antioxidant phytoconstituents from leaves and flower buds of Inula viscosa (L.) Aiton (Asteraceae) grown wild in Morocco. Maceration and hot extraction with methanol or water and Soxhlet ethanol extraction were utilized. The antioxidant potential was evaluated in vitro by DPPH, reducing power, and ferrous ions chelating activity assays. I. viscosa leaf and flower bud extracts displayed the strongest effect in the DPPH test, being the Soxhlet ethanol the most active ones (IC50 = 54.24 ± 0.21 µg/mL and 39.77 ± 0.23 µg/mL); thus, they were selected for further investigations. The antimicrobial efficacy of the Soxhlet ethanol extracts against ATCC and food isolates strains was assayed; the leaf extract showed the best activity, and Candida albicans was the most sensitive strain (MIC = 125 µg/mL). The extracts resulted non-toxic against Artemia salina. Among the phenolics characterised by HPLC-PDA-ESI-MS, hispidulin hexoside, patuletin and spinacetin were identified for the first time.


Assuntos
Anti-Infecciosos/isolamento & purificação , Antioxidantes/isolamento & purificação , Inula/química , Fenóis/análise , Extratos Vegetais/química , Animais , Anti-Infecciosos/análise , Anti-Infecciosos/farmacologia , Antioxidantes/química , Antioxidantes/farmacologia , Artemia/efeitos dos fármacos , Candida albicans/efeitos dos fármacos , Cromatografia Líquida de Alta Pressão , Flores/química , Marrocos , Fenóis/química , Extratos Vegetais/normas , Folhas de Planta/química , Solventes/química
5.
J Relig Health ; 59(1): 223-233, 2020 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-30649707

RESUMO

Recent studies suggest that religion and spirituality can yield health benefits for young African-Americans. We examined the relationship between religious practices, spirituality, and excess weight among African-American adolescents (N = 212) residing in the Deep South. Results from modified Poisson regression analysis indicate that adolescents who prayed daily had a lower prevalence of excess weight (PR 0.77 [95% CI 0.62-0.96]) than those who did not. This relationship was only significant for 12-15 year-old participants in age-stratified analysis. These findings suggest that preventive interventions offered to children and younger adolescents can have implications for weight status across the lifespan.


Assuntos
Negro ou Afro-Americano/psicologia , Peso Corporal , Disparidades nos Níveis de Saúde , Obesidade Infantil/etnologia , Espiritualidade , Adolescente , Criança , Feminino , Humanos , Masculino , Mississippi/epidemiologia , Obesidade Infantil/psicologia , Projetos Piloto , Saúde da População , Prevalência , Religião
7.
Ethn Dis ; 29(Suppl 3): 623-628, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31889767

RESUMO

There is growing recognition that the genomic and precision medicine revolution in health care can deepen health disparities. This has produced urgent calls to prioritize inclusion of historically underrepresented populations in research and to make genomic databases more inclusive. Answering the call to address health care disparities in the delivery of genomic and precision medicine requires a consideration of important, yet understudied, legal issues that have blocked progress. This article introduces a special issue of Ethnicity & Disease which contains a series of articles that grew out of a public conference to investigate these legal issues and propose solutions. This 2018 conference at Meharry Medical College was part of an NIH-funded project on "LawSeqSM" to evaluate and improve the law of genomics in order to support appropriate integration of genomics into clinical care. This conference was composed of presentations and interactive sessions designed to specify the top legal barriers to health equity in precision medicine and stimulate potential solutions. This article synthesizes the results of those discussions. Multiple legal barriers limit broad inclusion in genomic research and the development of precision medicine to advance health equity. Problems include inadequate privacy and anti-discrimination protections for research participants, lack of health coverage and funding for follow-up care, failure to use law to ensure access to genomic medicine, and practices by research sponsors that tolerate and entrench disparities. Analysis of the legal barriers to health equity in precision medicine is essential for progress. Progressive use of law is vital to avoid worsening of health care disparities.


Assuntos
Prestação Integrada de Cuidados de Saúde , Genômica/ética , Equidade em Saúde , Disparidades em Assistência à Saúde/etnologia , Medicina de Precisão , Prestação Integrada de Cuidados de Saúde/legislação & jurisprudência , Prestação Integrada de Cuidados de Saúde/organização & administração , Etnicidade , Equidade em Saúde/ética , Equidade em Saúde/legislação & jurisprudência , Equidade em Saúde/organização & administração , Disparidades em Assistência à Saúde/ética , Humanos , Medicina de Precisão/métodos , Medicina de Precisão/normas , Medicina de Precisão/tendências
8.
Artigo em Inglês | MEDLINE | ID: mdl-30326604

RESUMO

Health has many dimensions, and intolerance and lack of compassion may contribute to the poor health and disparities in our nation. Tolerance can convey an inherent paradox or dissonance that can be associated with stress. However, tolerance has a dimension of acceptance, an acknowledgement and acceptance of what "is" at the present moment, that can relieve tension associated with differing beliefs and practices. Compassionate consideration of others can be combined with acceptance to create harmony within and across individuals. In this article, we explore how contemplative practices can cultivate tolerance and compassion and contribute to improvements in individual and population health.


Assuntos
Empatia , Saúde da População , Humanos , Terapias Espirituais
9.
Behav Med ; 42(3): 183-9, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-27337622

RESUMO

Spirituality and religion have been identified as important determinants of health for adults; however, the impact of faith-oriented factors on health behaviors and outcomes among African American adolescent males has not been well studied. The purpose of this study is to examine the relationship between religiosity and spirituality and obesity-related behaviors among 12-19 year old African American males (N = 105) in the Jackson Heart KIDS Pilot Study. Key variables of interest are church attendance, prayer, daily spirituality, weight status, attempts to lose weight, nutrition, physical activity, and stress. Daily spirituality is associated with whether an individual attempts to lose weight. The results from logistic regression models suggest that daily spirituality increases the odds that African American male adolescents attempt to lose weight (OR = 1.22, CI: 1.07-1.41) and have a history of diet-focused weight management (OR = 1.13, CI: 1.02-1.26). Future studies are needed to further explore the association between religion, spirituality, and obesity-related behaviors.


Assuntos
Negro ou Afro-Americano , Comportamentos Relacionados com a Saúde , Obesidade/terapia , Espiritualidade , Redução de Peso , Adolescente , Criança , Humanos , Masculino , Modelos Teóricos , Obesidade/psicologia , Projetos Piloto , Adulto Jovem
10.
Int J Immunopathol Pharmacol ; 27(4): 683-7, 2014.
Artigo em Inglês | MEDLINE | ID: mdl-25572751

RESUMO

Chronic rhinosinusitis (CRS) determines irreversible alterations of the nasal mucosa with consequent impairment of ciliary movements and, therefore, mucociliary clearance (MCC). People of all ages can be affected by CRS but the elderly are subjects at the highest risk. CRS in the elderly with an age-related physiological impairment of nasal respiratory function, often accompanied by other chronic diseases, requires additional therapies to be added to the numerous daily medications. Since the currently available therapies for CRS include the use of drugs that can have adverse effects and contraindications, crenotherapy could represent a therapeutic option. Indeed, because the adverse effects and contraindications of crenotherapy are scarce, it can be safely used in elderly patients with comorbidities. The aim of this study is to evaluate the nasal cytological assessment after crenotherapy in elderly subjects with CRS. Two groups, comprising a total of 84 elderly subjects with CRS, were treated with crenotherapy with sodium chloride sulphate hyperthermal water rich in mineral salts (group I, n=49) and saline solution (group II n=35). Cytological assessment for both groups took place at baseline (T0) and 1 month after treatment (T30). At T30 the nasal cytological assessment showed statistically significant improvements in the ciliary motility and in the count of neutrophils and spores in group I, but not in group II. Conversely, there were no significant differences in the count of eosinophils, mast cells, bacteria and biofilm in either group. Our data for the first time focused on the role of crenotherapy in the improvement of cytological assessment of CRS in the elderly.


Assuntos
Balneologia/métodos , Mucosa Nasal/patologia , Rinite/terapia , Sinusite/terapia , Idoso , Doença Crônica , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Rinite/patologia , Sinusite/patologia
11.
Neuroscience ; 258: 184-91, 2014 Jan 31.
Artigo em Inglês | MEDLINE | ID: mdl-24239718

RESUMO

Subliminal electromagnetic fields (EMFs) triggered nonlinear evoked potentials in awake but not anesthetized animals, and increased glucose metabolism in the hindbrain. Field detection occurred somewhere in the head and possibly was an unrecognized function of sensory neurons in facial skin, which synapse in the trigeminal nucleus and project to the thalamus via glutamate-dependent pathways. If so, anesthetic agents that antagonize glutamate neurotransmission would be expected to degrade EMF-evoked potentials (EEPs) to a greater extent than agents having different pharmacological effects. We tested the hypothesis using ketamine which blocks N-methyl-d-aspartate (NMDA) receptors (NMDARs), and xylazine which is an α2-adrenoreceptor agonist. Electroencephalograms (EEGs) of rats were examined using recurrence analysis to observe EEPs in the presence and absence of ketamine and/or xylazine anesthesia. Auditory evoked potentials (AEPs) served as positive controls. The frequency of observation of evoked potentials in a given condition (wake or anesthesia) was compared with that due to chance using the Fisher's exact test. EEPs were observed in awake rats but not while they were under anesthesia produced using a cocktail of xylazine and ketamine. In another experiment each rat was measured while awake and while under anesthesia produced using either xylazine or ketamine. EEPs and AEPs were detected during wake and under xylazine (P<0.05 in each of the four measurements). In contrast, neither EEPs nor AEPs were observed when anesthesia was produced partly or wholly using ketamine. The duration and latency of the EEPs was unaltered by xylazine anesthesia. The afferent signal triggered by the transduction of weak EMFs was likely mediated by NMDAR-mediated glutamate neurotransmission.


Assuntos
Encéfalo/fisiologia , Campos Eletromagnéticos , Percepção/fisiologia , Receptores de N-Metil-D-Aspartato/metabolismo , Vigília/fisiologia , Estimulação Acústica , Agonistas de Receptores Adrenérgicos alfa 2/farmacologia , Anestesia , Animais , Encéfalo/efeitos dos fármacos , Eletroencefalografia , Potenciais Evocados/efeitos dos fármacos , Potenciais Evocados Auditivos/efeitos dos fármacos , Antagonistas de Aminoácidos Excitatórios/farmacologia , Feminino , Ketamina/farmacologia , Percepção/efeitos dos fármacos , Estimulação Física , Ratos , Ratos Sprague-Dawley , Receptores Adrenérgicos alfa 2/metabolismo , Receptores de N-Metil-D-Aspartato/antagonistas & inibidores , Vigília/efeitos dos fármacos , Xilazina/farmacologia
12.
Curr Med Chem ; 20(24): 2953-63, 2013.
Artigo em Inglês | MEDLINE | ID: mdl-23746276

RESUMO

Omega-3 polyunsaturated fatty acids (PUFA) are essential unsaturated fatty acids with a double bond (C=C) starting after the third carbon atom from the end of the carbon chain. They are important nutrients but, unfortunately, mammals cannot synthesize them, whereby they must be obtained from food sources or from supplements. Amongst nutritionally important polyunsaturated n-3 fatty acids, α-linolenic acid (ALA), eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) are highly concentrated in the brain and have anti-oxidative stress, anti-inflammatory and antiapoptotic effects. They are involved in many bodily processes and may reportedly lead to neuron protection in neurological diseases. aged or damaged neurons and in Alzheimer's disease. Their effect in cognitive and behavioral functions and in several neurological and psychiatric disorders has been also proven. The dentate gyrus (DG), a sub-region of hippocampus, is implicated in cognition and mood regulation. The hippocampus represents one of the two areas in the mammalian brain in which adult neurogenesis occurs. This process is associated with beneficial effects on cognition, mood and chronic pharmacological treatment. The exposure to n-3 fatty acids enhances adult hippocampal neurogenesis associated with cognitive and behavioral processes, promotes synaptic plasticity by increasing long-term potentiation and modulates synaptic protein expression to stimulate the dendritic arborization and new spines formation. On this basis we review the effect of n-3 fatty acids on adult hippocampal neurogenesis and neuroplasticity. Moreover their possible use as a new therapeutic approach for neurodegenerative diseases is pointed out.


Assuntos
Giro Denteado/metabolismo , Ácidos Graxos Ômega-3/farmacologia , Neurogênese/efeitos dos fármacos , Plasticidade Neuronal/efeitos dos fármacos , Adulto , Transtornos Psicóticos Afetivos/fisiopatologia , Doença de Alzheimer/fisiopatologia , Doença de Alzheimer/prevenção & controle , Animais , Cognição/efeitos dos fármacos , Suplementos Nutricionais , Humanos , Modelos Animais , Esquizofrenia/fisiopatologia
13.
Artigo em Inglês | MEDLINE | ID: mdl-22526110

RESUMO

Nematocytes' discharge is triggered to perform both defense and predation strategies in cnidarians and occurs under chemico-physical stimulation. In this study, different compounds such as amino acids and proteins (mucin, albumin, poly-L: -lysine, trypsin), sugars and N-acetylate sugars (N-acetyl neuraminic acid, N-acetyl galactosamine, sucrose, glucose, agarose and trehalose), nucleotides (ATP and cAMP), were tested as chemosensitizers of nematocyte discharge in the oral arms of the scyphozoan Pelagia noctiluca, particularly abundant in the Strait of Messina (Italy). Excised oral arms were submitted to a combined chemico-physical stimulation by treatment with different compounds followed by mechanical stimulation by a non-vibrating test probe. Discharge induced by a chemico-physical stimulation was more significant than that obtained after mechanical stimulation alone. A chemosensitizing mechanism, with a dose-dependent effect, was observed after treatment with sugars, amino compounds such as glutathione, nucleotides and mucin, according to that already seen in sea anemones. Such findings suggest that, though Anthozoa and Scyphozoa exhibit different divergence times during the evolutionary process, the discharge activation exhibits common features, probably derived from their last common ancestor.


Assuntos
Células Quimiorreceptoras/fisiologia , Nematocisto/fisiologia , Cifozoários/fisiologia , Transdução de Sinais , Aminas/farmacologia , Aminoácidos/farmacologia , Animais , Cálcio/metabolismo , Carboidratos/farmacologia , Células Quimiorreceptoras/efeitos dos fármacos , Relação Dose-Resposta a Droga , Mecanotransdução Celular , Nematocisto/citologia , Nematocisto/efeitos dos fármacos , Nucleotídeos/farmacologia , Estimulação Física , Proteínas/farmacologia , Cifozoários/citologia , Cifozoários/efeitos dos fármacos , Transdução de Sinais/efeitos dos fármacos , Fatores de Tempo
14.
Eur J Cancer ; 48(1): 24-9, 2012 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-21775129

RESUMO

AIM: Registered dose capecitabine monotherapy is active against metastatic breast cancer (MBC), but retrospective analyses indicate that lower doses may be as effective and better tolerated. This study was conducted to assess the safety and efficacy of metronomic capecitabine in heavily pretreated patients with MBC. PATIENTS AND METHODS: In this phase II study 60 MBC patients received continuous metronomic capecitabine monotherapy (1500 mg once a day). Primary endpoint was clinical benefit rate, secondary end points were clinical benefit rates (CBRs), tumour response rates (RRs), overall survival (OS), time to progression (TTP), duration of response (DOR) and toxicity. RESULTS: Fifty eight assessable patients received two or more 28-day cycles of metronomic capecitabine. The CBR was 62%. Median DOR was 7 months. Median TTP and OS were 7 and 17 months, respectively. Two partial responses and 7 cases of stable disease were recorded in 13 patients who had previously received capecitabine intermittently (2000 mg/m(2)/day on days 1-14 every 21 days) as first- or subsequent-line treatment for MBC. Grade 3-4 adverse events were uncommon; haematologic toxicity was infrequent (5%) and consistently mild. CONCLUSION: This regimen of metronomic capecitabine displayed good activity and excellent tolerability in MBC patients, including those who had previously received the drug at standard doses.


Assuntos
Neoplasias da Mama/tratamento farmacológico , Carcinoma/tratamento farmacológico , Desoxicitidina/análogos & derivados , Fluoruracila/análogos & derivados , Administração Metronômica , Adulto , Idoso , Idoso de 80 Anos ou mais , Antimetabólitos Antineoplásicos/administração & dosagem , Antimetabólitos Antineoplásicos/efeitos adversos , Neoplasias da Mama/patologia , Capecitabina , Carcinoma/patologia , Quimioterapia Adjuvante , Desoxicitidina/administração & dosagem , Desoxicitidina/efeitos adversos , Relação Dose-Resposta a Droga , Feminino , Fluoruracila/administração & dosagem , Fluoruracila/efeitos adversos , Humanos , Pessoa de Meia-Idade , Metástase Neoplásica , Terapia de Salvação , Resultado do Tratamento
15.
Food Chem Toxicol ; 49(10): 2600-8, 2011 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-21784120

RESUMO

The present study was designed to define the phenolic profile and the biological potential of berries methanol extract of Juniperus drupacea Labill. from Turkey. The total phenolic content (Folin-Ciocalteau assay) was 48.06±0.99mgGAE/g extract. The HPLC-DAD-ESI-MS analysis allowed the determination of the complete phenolic profile of J. drupacea berries. Phenolic acids represented more than 60% of the total phenolics, and tyrosol was the major one (1324±0.64µg/g extract); within the flavonoids amentoflavone was detected as the main constituent (927±0.35µg/g extract). The extract exhibited good antioxidant properties, as determined by different in vitro models: DPPH test (IC(50) 0.38±0.02mg/mL), reducing power (12.63±0.14ASE/mL), Fe(2+) chelating ability (IC(50) 2.26±0.06mg/mL), and TBA test (IC(50) 2.47±1.13µg/mL). Cytotoxicity against Artemia salina was highlighted (LC(50) 489.47±27.8µg/mL), and a significant decrease (p⩽0.05; p⩽0.01) in HepG2 cells viability was observed at the higher concentrations (5-10µg/mL). The extract displayed good antibacterial activity towards Gram-positive bacteria and in particular Staphylococcus aureus was the most susceptible strain (MIC 78.12µg/mL).


Assuntos
Antioxidantes/análise , Frutas/química , Juniperus/química , Fenóis/análise , Extratos Vegetais/química , Animais , Antioxidantes/farmacologia , Artemia , Compostos de Bifenilo/química , Sobrevivência Celular/efeitos dos fármacos , Células Hep G2 , Humanos , Testes de Sensibilidade Microbiana , Fenóis/farmacologia , Picratos/química , Extratos Vegetais/farmacologia , Espectrometria de Massas por Ionização por Electrospray , Substâncias Reativas com Ácido Tiobarbitúrico/análise , Turquia
16.
Artigo em Inglês | MEDLINE | ID: mdl-18619552

RESUMO

The haemolytic power of isolated nematocysts from the scyphozoan Pelagia noctiluca was studied with attention to the effect of osmotic protectants as carbohydrates at different MW, cations as Mg2+, Ca2+, Ba2+,Cu2+, K+; proteases as collagenase, trypsin, alpha-chymotrypsin, papain; and antioxidants. Crude venom was at first obtained by sonication of holotrichous-isorhiza nematocysts previously isolated from oral arms of P. noctiluca and then haemolytically tested upon human erythrocytes. Osmotic protectants were effective in inhibiting the haemolytic power depending on their molecular weight so that total inhibition of crude venom-induced haemolysis was observed after PEG treatment (polyethyleneglycol 6000Da). Amongst divalent cations only Ba2+ and Cu2+ significantly inhibited the haemolytic power of crude venom. Proteases seem not to alter the haemolytic activity while antioxidant compounds only slightly reduced the haemolytic power. Such findings may suggest a pore-forming mechanism for P. noctiluca crude venom rather than an oxidative damage to the cell membrane.


Assuntos
Venenos de Cnidários/farmacologia , Hemólise/efeitos dos fármacos , Cifozoários/metabolismo , Animais , Antioxidantes/farmacologia , Cátions/farmacologia , Ácido Edético/farmacologia , Eritrócitos/citologia , Eritrócitos/efeitos dos fármacos , Humanos , Osmose/efeitos dos fármacos , Peptídeo Hidrolases/farmacologia , Substâncias Protetoras/farmacologia , Cifozoários/citologia , Cifozoários/enzimologia
17.
New Microbiol ; 26(1): 125-8, 2003 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-12585233

RESUMO

The antiherpes virus-1 and genotoxic activities of diethyl ether extract from flowering tops of Helichrysum italicum (Compositae) were investigated. The extract showed significant antiviral activity at concentrations ranging from 400 to 100 microg/ml. This activity was not due to cytotoxic effect of the extract since Vero cells exhibited altered morphology or growth characteristics indicative of cytotoxic effects at higher concentration (800 microg/ml). Moreover H. italicum extract showed no DNA-damaging activity at concentrations up to 2000 microg/disk.


Assuntos
Antivirais/química , Antivirais/farmacologia , Helichrysum/química , Simplexvirus/efeitos dos fármacos , Animais , Antivirais/toxicidade , Chlorocebus aethiops , Dano ao DNA , DNA Viral/metabolismo , Topos Floridos/química , Extratos Vegetais/química , Extratos Vegetais/farmacologia , Extratos Vegetais/toxicidade , Simplexvirus/genética , Células Vero
18.
Lett Appl Microbiol ; 35(5): 385-9, 2002.
Artigo em Inglês | MEDLINE | ID: mdl-12390486

RESUMO

AIMS: This study was focused on the preserving properties of Calamintha officinalis essential oil, a plant known for its diaphoretic, expectorant and aromatic properties. METHODS AND RESULTS: The commercial aerial parts of C. officinalis Moench were hydrodistilled and the essential oil analysed by Gas chromatography/Electron impact mass spectrometry (GC/EIMS). The inhibition efficacy of this essence, alone (0.5 and 1.0% v/v) and in combination with 2.0 mM EDTA, was assayed, in culture medium and in cetomacrogol cream, using preservative efficacy testing against standard microrganisms (E. coli ATCC 25922, Ps. aeruginosa ATCC 9027, Staph. aureus ATCC 6538P, C. albicans ATCC 10231 and A. niger ATCC 16404). C. officinalis essential oil in cetomacrogol cream with EDTA showed long-lasting antimicrobial activity, satisfying the European Pharmacopoeia Commission (E. P.) criteria. CONCLUSION: C. officinalis essential oil could have a potential for a future use as a cosmetic preservative. IMPACT OF THE STUDY: To find natural compounds with antimicrobial activity which could be alternatives to the synthetic chemical preservatives.


Assuntos
Ácido Edético/farmacologia , Microbiologia Industrial , Óleos Voláteis/farmacologia , Plantas Medicinais/metabolismo , Conservantes Farmacêuticos/farmacologia , Aspergillus niger/efeitos dos fármacos , Candida albicans/efeitos dos fármacos , Cetomacrogol/metabolismo , Meios de Cultura , Escherichia coli/efeitos dos fármacos , Óleos de Plantas/farmacologia , Pseudomonas aeruginosa/efeitos dos fármacos , Staphylococcus aureus/efeitos dos fármacos
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA