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1.
Bioresour Bioprocess ; 11(1): 5, 2024 Jan 03.
Artigo em Inglês | MEDLINE | ID: mdl-38647804

RESUMO

Crop residues in agriculture pose disposal challenges and contribute to air pollution when burned. This study aims to use pigeonpea and maize stalks to produce biochar at different pyrolysis temperatures. Biochar can serve in carbon sequestration, as a soil amendment, and as an alternative fuel source. Pyrolysis was conducted at 400, 500, and 600 °C to examine the effects on physicochemical properties, fuel, and energy related properties. Increase in temperatures resulted in decrease of biochar yield, volatile matter, and O/C and H/C atomic ratios, while ash content and essential nutrients increased. Yield was observed to be higher in pigeonpea stalks derived biochar compared to maize stalks derived biochar at same pyrolysis temperatures. The yields of pigeonpea stalks derived biochar at 400 °C, 500 °C, and 600 °C are 34, 33 and 29%, respectively, and the yields of maize biomass-derived biochar at 400 °C, 500 °C, and 600 °C are 29, 28, and 26%, respectively. The organic carbon content is found to be higher in the biochar samples prepared at 600 °C, i.e., 10.44%, and 10.39% for pigeonpea and maize-derived biochar, respectively. The essential elements of biochar were increased with an increase in pyrolysis temperature except nitrogen which is conversely related to temperature. The biochar obtained through pyrolysis at 400 °C demonstrated superior characteristics compared to biochar produced at other temperatures. It exhibited a higher biochar yield, with approximately 84.60% for pigeonpea and 64.85% for maize fixed carbon content. Additionally, the energy retention efficiency was higher, reaching 67.33% for pigeonpea and 42.70% for maize-derived biochar at a pyrolysis temperature of 400 °C. The fixed carbon recovery efficiency was also notable at around 200.44% for PPS and 142.37% for maize biochar which is higher compared to biochar produced at other temperatures. Furthermore, the higher heating value (HHV) was approximately 30.75 MJ kg-1 for both the biochars, indicating their suitability as alternative solid fuels. A significant CO2 reduction potential of 84 CO2 eq kg-1 and 55 CO2 eq kg-1 was observed for pigeonpea and maize biochar, respectively. Hence, biochar is a promising and effective option for carbon sequestration, offering environmental benefits.

2.
J Leukoc Biol ; 115(6): 1177-1182, 2024 May 29.
Artigo em Inglês | MEDLINE | ID: mdl-38298146

RESUMO

CXCL17, a novel member of the CXC chemokine class, has been implicated in several human pathologies, but its role in mediating immune response is not well understood. Characteristic features of immune response include resident macrophages orchestrating successive and structured recruitment of neutrophils and monocytes to the insult site. Here, we show that Cxcl17 knockout (KO) mice, compared with the littermate wild-type control mice, were significantly impaired in peritoneal neutrophil recruitment post-lipopolysaccharide (LPS) challenge. Further, the KO mice show dysregulated Cxcl1, Cxcr2, and interleukin-6 levels, all of which directly impact neutrophil recruitment. Importantly, the KO mice showed no difference in monocyte recruitment post-LPS challenge or in peritoneal macrophage levels in both unchallenged and LPS-challenged mice. We conclude that Cxcl17 is a proinflammatory chemokine and that it plays an important role in the early proinflammatory response by promoting neutrophil recruitment to the insult site.


Assuntos
Quimiocinas CXC , Lipopolissacarídeos , Camundongos Knockout , Neutrófilos , Receptores de Interleucina-8B , Animais , Camundongos , Neutrófilos/imunologia , Neutrófilos/metabolismo , Receptores de Interleucina-8B/metabolismo , Receptores de Interleucina-8B/genética , Quimiocinas CXC/metabolismo , Quimiocinas CXC/genética , Lipopolissacarídeos/farmacologia , Quimiocina CXCL1/metabolismo , Quimiocina CXCL1/genética , Interleucina-6/metabolismo , Interleucina-6/genética , Infiltração de Neutrófilos , Camundongos Endogâmicos C57BL , Inflamação/imunologia , Inflamação/patologia , Inflamação/metabolismo , Macrófagos Peritoneais/imunologia , Macrófagos Peritoneais/metabolismo , Monócitos/imunologia , Monócitos/metabolismo
3.
J Family Med Prim Care ; 12(9): 2058-2063, 2023 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-38024904

RESUMO

Introduction: Demographic transition enhanced the proportion of geriatric population in India. Senior citizens experience progressive economic dependency for their daily survival. The Government of India provides economic assistance through social welfare schemes. However, inadequate awareness of schemes is the key reason for its low utilization. The present study was implemented to evaluate knowledge and utilization of social welfare schemes and also to assess the effect of educational intervention on awareness of elderly persons about welfare schemes. Materials and Methods: A community-based interventional study carried out from July to December 2022. A structured 'TIV intervention' comprised of 'Training module', 'Interactive sessions' and 'Village Health Meeting' was administered on 839 elderly persons in one of the rural blocks of Mahabubnagar district of Telangana State of India. Community health workers were actively involved in sensitization sessions. Pre- and postintervention questionnaires were completed through face-to-face interview with participants by trained social workers. The statistical analysis was performed using SPSS Version 20 Software. Results: There was a statistically significant improvement in awareness levels and utilization of social welfare schemes due to TIV intervention (P < 0.001, SD = 3.01vs 1.21). The awareness of schemes was significantly greater among males, literates, socioeconomic scale of classes 1 and 2 and with age group of 60-70 years. Conclusions: Simple, cost-effective intervention can make significant gain in awareness and utilization levels of social welfare schemes among elderly population. 'Traditional Village Meetings' can be used as a potential opportunity to sensitize community members about social welfare schemes.

4.
Psychol Stud (Mysore) ; 68(2): 190-196, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-36474579

RESUMO

India and its people are commonly known for their unique culture and tradition. Cricket and mythology are much interwoven into the lives of people as both are almost inseparable part of their life and culture. Although the two fields are completely different from each other, there is a deep-rooted connection between them when it comes to their popularity in India. Most of the people of India have spent their childhood either by listening to the stories of mythology or watching cricket, because the two interesting activities that consciously impact the mind and gain the attention so easily. The psychological aspects of both game and stories literally leave a strong impact in human mind. Hence, this paper attempts to integrate the psychological aspects of the game and mythology by analyzing the existing mental health problems of Indian cricketers with reference to the mythological stories of Indian heroes. It further aims to provide the proposed model for mental fitness named SPORTS as a guide to mental training for contemporary cricketers to manage their emotions and control their mind for optimal performance.

6.
Curr Alzheimer Res ; 17(14): 1262-1279, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-33602095

RESUMO

Receptor for Advanced Glycation End product (RAGE) plays a crucial role in a variety of physiological and pathological processes due to its ability to bind a broad repertory of ligands. There are also multiple forms of RAGE that exist; some work on promoting feed-forward pathways while others perform inhibitory actions. This review focuses on the RAGE isoforms expression, its intracellular pathways activation via RAGE- ligand interaction, and its importance in the physiological and pathological process of the brain. Many studies have suggested that RAGE induces the pathophysiological changes in Alzheimer's disease (AD) by being an intermediator of inflammation and inducer of oxidative stress. The critical roles played by RAGE in AD include its involvement in amyloid-beta (Aß) production, clearance, synaptic impairment, and neuronal circuit dysfunction. RAGE-Aß interaction also mediates the bi-directional crosstalk between peripheral and central systems. This interaction underlies a potential molecular pathway that disrupts the material structure and physiology of the brain. This review highlights the structure-function relation for RAGEAß interaction and the role of RAGE as a potential target in the development of treatments for AD.


Assuntos
Doença de Alzheimer/fisiopatologia , Ligantes , Isoformas de Proteínas/metabolismo , Receptor para Produtos Finais de Glicação Avançada/metabolismo , Doença de Alzheimer/terapia , Peptídeos beta-Amiloides/metabolismo , Encéfalo/patologia , Humanos , Neurônios/patologia , Estresse Oxidativo
7.
Diabet Med ; 37(12): 2136-2142, 2020 12.
Artigo em Inglês | MEDLINE | ID: mdl-31721280

RESUMO

AIM: We aimed to explore the association between South Asian ethnicity and complications of type 1 diabetes, and whether this is affected by migration. METHODS: In this retrospective cohort study, data on diabetes control and complications were obtained for South Asians in India (South AsiansIndia , n = 2592) and the UK (South AsiansUK , n = 221) and white Europeans in the UK (n = 1431). Multivariable logistic regression was used to identify associations between ethnicity and diabetic kidney disease, retinopathy and neuropathy adjusting for age, sex, BMI, disease duration, HbA1c , blood pressure (BP) and cholesterol. RESULTS: South AsiansIndia had significantly greater adjusted odds of diabetic kidney disease [odds ratio (OR) 5.0, 95% confidence intervals (CI) 3.6-7.1] and retinopathy (OR 1.8, 95% CI 1.2-2.5), but lower odds of neuropathy (OR 0.5, 95% CI 0.4-0.6) than white Europeans. South AsiansIndia had significantly greater adjusted odds of diabetic kidney disease (OR 3.0, 95% 1.8-5.3) than South AsiansUK , but there was no significant difference in the odds of other complications. CONCLUSIONS: In this hypothesis-generating study, we report that South Asian ethnicity is associated with greater risk of diabetic kidney disease and retinopathy, and lower risk of neuropathy than white European ethnicity. Part of the excess diabetic kidney disease risk is reduced in South AsiansUK . These associations cannot be accounted for by differences in vascular risk factors. Our findings in South Asians with type 1 diabetes mirror previous findings in type 2 diabetes and now need to be validated in a study of the effect of ethnicity on type 1 diabetes complications where healthcare is provided in the same setting.


Assuntos
Diabetes Mellitus Tipo 1/metabolismo , Nefropatias Diabéticas/etnologia , Neuropatias Diabéticas/etnologia , Retinopatia Diabética/etnologia , Adolescente , Adulto , Diabetes Mellitus Tipo 1/complicações , Nefropatias Diabéticas/epidemiologia , Nefropatias Diabéticas/etiologia , Neuropatias Diabéticas/epidemiologia , Neuropatias Diabéticas/etiologia , Retinopatia Diabética/epidemiologia , Retinopatia Diabética/etiologia , Emigração e Imigração , Feminino , Hemoglobinas Glicadas/metabolismo , Humanos , Índia/epidemiologia , Índia/etnologia , Masculino , Reino Unido/epidemiologia , População Branca , Adulto Jovem
8.
Front Neurosci ; 13: 1305, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31866814

RESUMO

Synthetic glucocorticoids (GCs) are widely used to treat inflammatory conditions. However, chronic use of GCs can lead to hypertension. The cause of this undesired side effect remains unclear. Previously, we developed an in vivo rat model to study the mechanisms underlying hypertension induced by the chronic administration of the potent synthetic GC, dexamethasone (DEX) and found that the catecholamine biosynthetic pathway plays an important role. In the current study, we used this model to investigate the role of the adrenal medulla, renal nerves, and other peripheral sympathetic nerves in DEX-induced hypertension. After 5 days of baseline telemetric recording of mean arterial pressure (MAP) and heart rate (HR), rats were subjected to one of the following treatments: renal denervation (RDNX), adrenal medullectomy (ADMX), 6-hydroxydopamine (6-OHDA, 20 mg/kg, i.p.) to induce chemical sympathectomy, or a combination of ADMX and 6-OHDA. On day 11, the animals received vehicle (VEH) or DEX in drinking water for 7 days, with the latter causing an increase in MAP in control animals. ADMX and RDNX by themselves exacerbated the pressor effect of DEX. In the chemical sympathectomy group, DEX still caused a rise in MAP but the response was lower (ΔMAP of 6-OHDA/DEX < VEH/DEX, p = 0.039). However, when ΔMAP was normalized to day 10, 6-OHDA + DEX did not show any difference from VEH + DEX, certainly not an increase as observed in DEX + ADMX or RDNX groups. This indicates that sympathetic nerves do not modulate the pressor effect of DEX. TH mRNA levels increased in the adrenal medulla in both VEH/DEX (p = 0.009) and 6-OHDA/DEX (p = 0.031) groups. In the 6-OHDA group, DEX also increased plasma levels of norepinephrine (NE) (p = 0.016). Our results suggest that the activation of catecholamine synthetic pathway could be involved in the pressor response to DEX in animals even under chemical sympathectomy with 6-OHDA.

9.
Water Sci Technol ; 77(11-12): 2642-2656, 2018 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-29944129

RESUMO

In this study, a slurry photocatalytic membrane reactor (PMR) was developed and evaluated for the degradation of aqueous phenanthrene (PHE). During continuous process with a hydraulic retention time (HRT) of 140 min, the maximum PHE degradation and total organic carbon (TOC) removal efficiencies were found to be 97% and 79%, respectively. The reuse and recovery potential of TiO2 was studied with continuous recycling. The major intermediates during photodegradation of PHE were found to be phenanthrenequinone, phenanthenol and fluorine. This study also includes an investigation of membrane fouling caused by hydrophilic nano TiO2. The cake layer observed on the membrane surface was characterized by scanning electron microscopy (SEM), atomic force microscopy (AFM) and energy dispersive spectroscopy (EDS). In addition, the effect of operating parameters such as pH and permeate flux on membrane fouling were also investigated. Low permeate flux and alkaline conditions reduced membrane fouling.


Assuntos
Fenantrenos/química , Eliminação de Resíduos Líquidos/instrumentação , Carbono/química , Catálise , Desenho de Equipamento , Flúor/química , Concentração de Íons de Hidrogênio , Membranas Artificiais , Microscopia de Força Atômica , Microscopia Eletrônica de Varredura , Fotólise , Espectrometria por Raios X , Titânio/química , Eliminação de Resíduos Líquidos/métodos , Poluentes Químicos da Água/química
11.
J Pharmacol Exp Ther ; 358(3): 528-36, 2016 09.
Artigo em Inglês | MEDLINE | ID: mdl-27405316

RESUMO

Our objective was to study hypertension induced by chronic administration of synthetic glucocorticoid, dexamethasone (DEX), under nonstressful conditions and examine the role of catecholamine biosynthesis. To achieve this, we did the following: 1) used radiotelemetry to record mean arterial pressure (MAP) and heart rate (HR) in freely moving rats, and 2) administered different doses of DEX in drinking water. To evaluate the involvement of tyrosine hydroxylase (TH), the rate-limiting step in catecholamine biosynthesis, we treated rats with the TH inhibitor, α-methyl-para-tyrosine (α-MPT), for 3 days prior to administration of DEX and assessed TH mRNA and protein expression by quantitative real-time polymerase chain reaction and Western blot in the adrenal medulla. We observed a dose-dependent elevation in blood pressure with a DEX dose of 0.3 mg/kg administered for 10 days, significantly increasing MAP by +15.0 ± 1.1 mm Hg, while concomitantly reducing HR. Although this DEX treatment also significantly decreased body weight, pair-fed animals that showed similar decreases in body weight due to lowered food intake were not hypertensive, suggesting that body weight changes may not account for DEX-induced hypertension. Chronic DEX treatment significantly increased the TH mRNA and protein levels in the adrenal medulla, and α-MPT administration not only reduced DEX pressor effects, but also inhibited TH (serine(40)) phosphorylation. Our study thus validates a novel model to study hypertension induced by chronic intake of DEX in freely moving rats not subject to the confounding factors of previous models and establishes its dependence on concomitant activation of peripheral catecholamine biosynthesis.


Assuntos
Dexametasona/farmacologia , Modelos Animais de Doenças , Hipertensão/induzido quimicamente , Hipertensão/enzimologia , Tirosina 3-Mono-Oxigenase/metabolismo , Medula Suprarrenal/efeitos dos fármacos , Medula Suprarrenal/metabolismo , Animais , Pressão Sanguínea/efeitos dos fármacos , Relação Dose-Resposta a Droga , Regulação Enzimológica da Expressão Gênica/efeitos dos fármacos , Hipertensão/metabolismo , Hipertensão/fisiopatologia , Masculino , Fosforilação/efeitos dos fármacos , Ratos , Serina/metabolismo , Tirosina 3-Mono-Oxigenase/antagonistas & inibidores , Tirosina 3-Mono-Oxigenase/química , Tirosina 3-Mono-Oxigenase/genética , alfa-Metiltirosina/farmacologia
12.
BMC Psychol ; 4(1): 33, 2016 Jun 06.
Artigo em Inglês | MEDLINE | ID: mdl-27268415

RESUMO

BACKGROUND: Intervention programs with the aim of enhancing parenting quality have been found to be differentially effective in decreasing negative child outcomes such as externalizing behavioral problems, resulting in modest overall effect sizes. Here we present the protocol for a randomized controlled trial to examine the efficacy of the Video-feedback Intervention to promote Positive Parenting and Sensitive Discipline for Twin Families (VIPP-Twins) on parenting quality and children's behavioral control and social competence. In addition, we aim to test the differential susceptibility theory; we examine differential efficacy of the intervention based on genetic make-up or temperament for both parents and children. Lastly, we explore neurobiological mechanisms underlying intervention effects on children's developmental outcomes. METHODS/DESIGN: The original VIPP-SD was adapted for use in families with twins. The VIPP-Twins consists of five biweekly sessions in which the families are visited at home, parent-child interactions are videotaped and parents receive positive feedback on selected video fragments. Families (N = 225) with a same sex twin (mean age = 3.6 years) were recruited to participate in the study. The study consists of four assessments. After two baseline assessments in year 1 and year 2, a random 40 % of the sample will receive the VIPP-Twins program. The first post-test assessment will be carried out one month after the intervention and there will be a long term follow-up assessment two years after the intervention. Measures include observational assessments of parenting and children's social competence and behavioral control, and neurobiological assessments (i.e., hormonal functioning and neural (re-)activity). DISCUSSION: Results of the study will provide insights in the efficacy of the VIPP-Twins and reveal moderators and mediators of program efficacy. Overall the randomized controlled trial is an experimental test of the differential susceptibility theory. TRIAL REGISTRATION: Dutch Trial Register: NTR5312 ; Date registered: July 20, 2015.


Assuntos
Educação não Profissionalizante/métodos , Retroalimentação Psicológica , Relações Pais-Filho , Poder Familiar , Gravação em Vídeo , Adulto , Desenvolvimento Infantil , Pré-Escolar , Feminino , Humanos , Masculino , Temperamento
13.
Acta Crystallogr E Crystallogr Commun ; 71(Pt 10): o712-3, 2015 Oct 01.
Artigo em Inglês | MEDLINE | ID: mdl-26594437

RESUMO

In the title compound, C21H29N3O, the dihedral angle between the planes of the aromatic rings is 8.1 (2)°. The ethyl groups at one terminal site of the compound are disordered over two sets of sites with occupancies of 0.775 (9) and 0.225 (9). The mol-ecule has an E conformation about the N=C bond. The mol-ecular structure features an intra-molecular O-H⋯N hydrogen bond, which closes an S(6) loop. In the crystal, weak C-H⋯π inter-actions leads to the formation of a three-dimensional network.

14.
Acta Crystallogr E Crystallogr Commun ; 71(Pt 7): o503, 2015 Jul 01.
Artigo em Inglês | MEDLINE | ID: mdl-26279932

RESUMO

The title Schiff base compound, C19H25N3O, is approximately planar, with a dihedral angle of 9.03 (13)° between the planes of the aromatic rings, and has an E conformation about the N=C bond. The mol-ecular structure is stabilized by an intra-molecular O-H⋯N hydrogen bond, with an S(6) ring motif. In the crystal, mol-ecules are linked by C-H⋯π inter-actions, forming sheets parallel to the bc plane.

15.
Int J Data Min Bioinform ; 11(1): 31-52, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-26255375

RESUMO

The greatest restriction in estimating the information measure for microarray data is the continuous nature of gene expression values. The traditional criterion function of f-information discretises the continuous gene expression value for calculating the probability function during gene selection. This leads to loss of biological meaning of microarray data and results in poor classification accuracy. To overcome this difficulty, the concepts of fuzzy and rough set are combined to redefine the criterion functions of f-information and are used to form candidate genes from which informative genes are selected using neural network. The performance of the proposed Fuzzy-Rough-Neural-based f-Information (FRNf-I) is evaluated using ten gene expression datasets. Simulation results show that the proposed approach compute f-information measure easily without discretisation. Statistical analysis of the test result shows that the proposed FRNf-I selects comparatively less number of genes and more classification accuracy than the other approaches reported in the literature.


Assuntos
Perfilação da Expressão Gênica/métodos , Proteínas de Neoplasias/metabolismo , Neoplasias/metabolismo , Análise de Sequência com Séries de Oligonucleotídeos/métodos , Reconhecimento Automatizado de Padrão/métodos , Algoritmos , Lógica Fuzzy , Humanos , Armazenamento e Recuperação da Informação/métodos , Proteínas de Neoplasias/genética , Neoplasias/genética , Redes Neurais de Computação , Reprodutibilidade dos Testes , Sensibilidade e Especificidade
16.
BMC Psychol ; 2(1): 51, 2014.
Artigo em Inglês | MEDLINE | ID: mdl-25520810

RESUMO

BACKGROUND: Tympanic membrane temperature (TMT) has been proposed as an indicator of cerebral activation and TMT asymmetry may indicate lateralization, which has been associated with specific (problem) behaviors in children and adults. The current study explored the relations between pre-adoption living arrangements, TMT, and behavior and sleep problems in a sample of adopted toddlers. METHODS: Ninety-two families who had adopted a Chinese girl who had previously been placed in an institution or foster care reported on behavior problems using the Child Behavior Checklist and TMT two months (Time 1) and six months (Time 2) after adoption. RESULTS: Structural equation modeling revealed that institutionalized children had significantly higher left than right TMTs compared with foster care children at Time 2. A higher left than right TMT was associated with increased sleep problems and total behavior problems at Time 1, but not at Time 2. CONCLUSIONS: Our findings with regard to pre-adoption living arrangements, TMT asymmetry, and sleep problems suggest that TMT is sensitive to early environmental influences and may be a biological marker of vulnerability to the development of sleep problems in children from adverse backgrounds.

17.
Psychoneuroendocrinology ; 38(11): 2746-57, 2013 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-23937971

RESUMO

Exposure to early-life stress is a risk factor for the development of cognitive and emotional disorders later in life. We previously demonstrated that prenatal stress (PNS) in rats results in long-term, stable changes in central stress-response systems and impairs the ability to extinguish conditioned fear responding, a component of post-traumatic stress disorder (PTSD). Maternal corticosterone (CORT), released during prenatal stress, is a possible mediator of these effects. The purpose of the present study was to investigate whether fetal exposure to CORT at levels induced by PNS is sufficient to alter the development of adult stress neurobiology and fear extinction behavior. Pregnant dams were subject to either PNS (60 min immobilization/day from ED 14-21) or a daily injection of CORT (10mg/kg), which approximated both fetal and maternal plasma CORT levels elicited during PNS. Control dams were given injections of oil vehicle. Male offspring were allowed to grow to adulthood undisturbed, at which point they were sacrificed and the medial prefrontal cortex (mPFC), hippocampus, hypothalamus, and a section of the rostral pons containing the locus coeruleus (LC) were dissected. PNS and prenatal CORT treatment decreased glucocorticoid receptor protein levels in the mPFC, hippocampus, and hypothalamus when compared to control offspring. Both treatments also decreased tyrosine hydroxylase levels in the LC. Finally, the effect of prenatal CORT exposure on fear extinction behavior was examined following chronic stress. Prenatal CORT impaired both acquisition and recall of cue-conditioned fear extinction. This effect was additive to the impairment induced by previous chronic stress. Thus, these data suggest that fetal exposure to high levels of maternal CORT is responsible for many of the lasting neurobiological consequences of PNS as they relate to the processes underlying extinction of learned fear. The data further suggest that adverse prenatal environments constitute a risk factor for PTSD-like symptomatology, especially when combined with chronic stressors later in life.


Assuntos
Encéfalo/metabolismo , Corticosterona/farmacologia , Extinção Psicológica/efeitos dos fármacos , Medo/efeitos dos fármacos , Efeitos Tardios da Exposição Pré-Natal/metabolismo , Efeitos Tardios da Exposição Pré-Natal/psicologia , Estresse Psicológico/psicologia , Animais , Encéfalo/efeitos dos fármacos , Fator Neurotrófico Derivado do Encéfalo/biossíntese , Corticosterona/sangue , Hormônio Liberador da Corticotropina/biossíntese , Medo/psicologia , Feminino , Expressão Gênica/efeitos dos fármacos , Masculino , Rememoração Mental/efeitos dos fármacos , Gravidez , Ratos , Receptores de Glucocorticoides/metabolismo , Estresse Psicológico/metabolismo , Tirosina 3-Mono-Oxigenase/biossíntese
18.
J Neurochem ; 126(1): 19-28, 2013 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-23647419

RESUMO

The human tyrosine hydroxylase (hTH) gene has a 42 bp evolutionarily conserved region designated (CR) II at -7.24 kb, which bears 93% homology to the region we earlier identified as containing the glucocorticoid response element, a 7 bp activator protein-1 (AP-1)-like motif in the rat TH gene. We cloned this hTH-CRII region upstream of minimal basal hTH promoter in luciferase (Luc) reporter vector, and tested glucocorticoid responsiveness in human cell lines. Dexamethasone (Dex) stimulated Luc activity of hTH-CRII in HeLa cells, while mifepristone, a glucocorticoid receptor (GR) antagonist, prevented Dex stimulation. Deletion of the 7 bp 5'-TGACTAA at -7243 bp completely abolished the Dex-stimulated Luc activity of hTH-CRII construct. The AP-1 agonist, tetradeconoyl-12,13-phorbol acetate (TPA), also stimulated hTH promoter activity, and Dex and TPA together further accentuated this response. Chromatin immunoprecipitation assays revealed the presence of both GR and AP-1 proteins, especially Jun family members, at this hTH promoter site. Dex did not stimulate hTH promoter activity in a catecholaminergic cell line, which had low endogenous GR levels, but did activate the response when GR was expressed exogenously. Thus, our studies have clearly identified a glucocorticoid-responsive element in a 7 bp AP-1-like motif in the promoter region at -7.24 kb of the human TH gene.


Assuntos
Sequência Conservada/genética , Glucocorticoides/genética , Elementos de Resposta/genética , Tirosina 3-Mono-Oxigenase/genética , Sequência de Bases , Evolução Biológica , Núcleo Celular/metabolismo , Células Cultivadas , Imunoprecipitação da Cromatina , Clonagem Molecular , DNA/genética , Dexametasona/farmacologia , Regulação Enzimológica da Expressão Gênica/genética , Vetores Genéticos , Células HeLa , Humanos , Luciferases/genética , Dados de Sequência Molecular , Células PC12 , Dibutirato de 12,13-Forbol/farmacologia , RNA Mensageiro/biossíntese , RNA Mensageiro/genética , Receptores de Glucocorticoides/genética , Transfecção
19.
Diabetes Technol Ther ; 15(1): 39-45, 2013 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-23150995

RESUMO

OBJECTIVE: This study evaluated the noninvasive, point-of-care diabetes screening device, Scout DS (VeraLight Inc., Albuquerque, NM) (SCOUT), in a native Asian Indian cohort. RESEARCH DESIGN AND METHODS: SCOUT is a tabletop, skin fluorescence spectrometer that reports a risk score following a 3-4-min noninvasive measurement of a subject's left volar forearm. SCOUT, fasting plasma glucose (FPG), and hemoglobin A(1c) (A1C) were compared for detection of abnormal glucose tolerance (AGT) in a cohort of 256 subjects without previous diagnosis of diabetes or impaired glucose tolerance in Chennai, India. After an overnight fast, a 75-g, 2-h oral glucose tolerance test was administered, and AGT was defined as a plasma glucose value ≥ 140 mg/dL (7.8 mmol/dL). Sensitivity, false-positive rate (FPR), and receiver-operating characteristics area under the curve for AGT detection were computed for SCOUT, FPG, and A1C. Intra-day reproducibility of SCOUT was assessed. RESULTS: SCOUT, FPG, and A1C (at respective thresholds of 50, 110 mg/dL, and 5.7%) exhibited sensitivities of 87%, 32%, and 86%, respectively, and FPR of 52%, 3%, and 58%, respectively. For the 177 subjects receiving a valid SCOUT Diabetes Score on both measurement attempts, the coefficient of variation was 5.8%, and the Pearson correlation was 0.91. A SCOUT score could be obtained on 91% of subjects after two attempts. CONCLUSIONS: The performance of SCOUT is similar to that of A1C, whereas FPG had a much lower sensitivity. SCOUT is an effective tool for AGT screening in Asian Indians.


Assuntos
Glicemia/metabolismo , Diabetes Mellitus Tipo 2/diagnóstico , Programas de Rastreamento/instrumentação , Pele/química , Espectrometria de Fluorescência/instrumentação , Braço , Diabetes Mellitus Tipo 2/epidemiologia , Diabetes Mellitus Tipo 2/metabolismo , Reações Falso-Positivas , Jejum , Feminino , Teste de Tolerância a Glucose , Humanos , Índia/epidemiologia , Masculino , Programas de Rastreamento/métodos , Pessoa de Meia-Idade , Curva ROC , Reprodutibilidade dos Testes , Sensibilidade e Especificidade , Pele/metabolismo , Espectrometria de Fluorescência/métodos , População Branca
20.
Nutrients ; 4(5): 399-412, 2012 05.
Artigo em Inglês | MEDLINE | ID: mdl-22690323

RESUMO

Bone and muscle weakness due to vitamin D deficiency is common among Muslim women who reside in sunny, equatorial countries. The purpose of this study was to determine if living in a northern maritime location additionally disadvantages women who wear concealing clothes. A cross-sectional matched pair design was used to compare women who habitually wore concealing clothing with women who dressed according to western norms. Each premenopausal hijab-wearing woman (n = 11) was matched by age, height, weight and skin tone with a western-dressed woman. Subjects were tested by hand grip dynamometry to assess muscular strength and by quantitative ultrasound at the calcaneus to assess bone status. Nutritional intake was obtained by 24 h recall. Serum 25-hydroxyvitamin D (s-25(OH)D) status was determined in seven matched pairs. The hijab group had lower s-25(OH)D than women who wore western clothes (40 ± 28 vs. 81 ± 32 nmol/L, p= 0.01). Grip strength in the right hand was lower in the hijab-wearing women (p = 0.05) but this appeared to be due to less participation in intense exercise. Bone status did not differ between groups (p= 0.9). Dietary intake of vitamin D was lower in the hijab-wearers (316 ± 353 vs. 601 ± 341 IU/day, p= 0.001). This pilot study suggests that women living in a northern maritime location appear to be at risk for vitamin D insufficiency and therefore should consider taking vitamin D supplements.


Assuntos
Vestuário , Vitamina D/análogos & derivados , Adulto , Calcâneo/diagnóstico por imagem , Cálcio da Dieta/administração & dosagem , Estudos Transversais , Cultura , Suplementos Nutricionais , Feminino , Força da Mão/fisiologia , Humanos , Nova Escócia/epidemiologia , Projetos Piloto , Pré-Menopausa , Religião , Fatores de Risco , Luz Solar , Ultrassonografia , Vitamina D/administração & dosagem , Vitamina D/sangue , Deficiência de Vitamina D/epidemiologia , Adulto Jovem
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