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1.
Sensors (Basel) ; 24(10)2024 May 16.
Artigo em Inglês | MEDLINE | ID: mdl-38794033

RESUMO

Effective emission control technologies and eco-friendly propulsion systems have been developed to decrease exhaust particle emissions. However, more work must be conducted on non-exhaust traffic-related sources such as tyre wear. The advent of automated vehicles (AVs) enables researchers and automotive manufacturers to consider ways to further decrease tyre wear, as vehicles will be controlled by the system rather than by the driver. In this direction, this work presents the formulation of an optimal control problem for the trajectory optimisation of automated articulated vehicles for tyre wear minimisation. The optimum velocity profile is sought for a predefined road path from a specific starting point to a final one to minimise tyre wear in fixed time cases. Specific boundaries and constraints are applied to the problem to ensure the vehicle's stability and the feasibility of the solution. According to the results, a small increase in the journey time leads to a significant decrease in the mass loss due to tyre wear. The employment of articulated vehicles with low powertrain capabilities leads to greater tyre wear, while excessive increases in powertrain capabilities are not required. The conclusions pave the way for AV researchers and manufacturers to consider tyre wear in their control modules and come closer to the zero-emission goal.

2.
Maturitas ; 179: 107871, 2024 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-37925867

RESUMO

Premature ovarian insufficiency and ovarian aging are complex conditions that affect women's reproductive health and overall well-being. They are both characterized by hypergonadotropic hypogonadism and infertility, and together affect about 1 in 100 women by the age of 40. This review explores the influence of environmental factors on the development and progression of premature ovarian insufficiency and ovarian aging. When referring to environmental factors, we include a wide range of external agents and conditions, including chemicals, socioeconomic factors and lifestyle choices. Through a review of the literature, we attempt to highlight the link between environmental factors and ovarian health. We examine the impact of endocrine-disrupting chemicals, such as bisphenol A and phthalates, on ovarian function and investigate the mechanisms by which these chemicals can disrupt hormone signaling pathways, leading to alterations in ovarian reserve, oocyte quality, and folliculogenesis. Moreover, we explore lifestyle factors like obesity, stress, smoking and alcohol in relation to their effects on ovarian aging. Epigenetic changes may play a crucial role in the prevalence of premature ovarian insufficiency. Understanding the impact of environmental factors on premature ovarian insufficiency and ovarian aging is very important in public and clinical health contexts. By identifying risk factors, healthcare providers can develop targeted and strategic prevention and intervention plans. Furthermore, this knowledge can promote reproductive health and minimize exposure to harmful environmental agents.


Assuntos
Menopausa Precoce , Insuficiência Ovariana Primária , Feminino , Humanos , Envelhecimento , Insuficiência Ovariana Primária/etiologia , Reprodução , Adulto
3.
Sensors (Basel) ; 23(16)2023 Aug 08.
Artigo em Inglês | MEDLINE | ID: mdl-37631553

RESUMO

Nowadays, intelligent vehicles are equipped with a number of advanced sensors, such as radar and cameras [...].

4.
Front Cardiovasc Med ; 10: 1148052, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37025684

RESUMO

Background: Fat layers in obese patients can impair R-wave detection and diagnostic performance of a subcutaneous insertable cardiac monitor (ICM). We compared safety and ICM sensing quality between obese patients [body mass index (BMI) ≥ 30 kg/m2] and normal-weight controls (BMI <30 kg/m2) in terms of R-wave amplitude and time in noise mode (noise burden) detected by a long-sensing-vector ICM. Materials and methods: Patients from two multicentre, non-randomized clinical registries are included in the present analysis on January 31, 2022 (data freeze), if the follow-up period was at least 90 days after ICM insertion, including daily remote monitoring. The R-wave amplitudes and daily noise burden averaged intraindividually for days 61-90 and days 1-90, respectively, were compared between obese patients (n = 104) and unmatched (n = 268) and a nearest-neighbour propensity score (PS) matched (n = 69) normal-weight controls. Results: The average R-wave amplitude was significantly lower in obese (median 0.46 mV) than in normal-weight unmatched (0.70 mV, P < 0.0001) or PS-matched (0.60 mV, P = 0.003) patients. The median noise burden was 1.0% in obese patients, which was not significantly higher than in unmatched (0.7%; P = 0.056) or PS-matched (0.8%; P = 0.133) controls. The rate of adverse device effects during the first 90 days did not differ significantly between groups. Conclusion: Although increased BMI was associated with reduced signal amplitude, also in obese patients the median R-wave amplitude was >0.3 mV, a value which is generally accepted as the minimum level for adequate R-wave detection. The noise burden and adverse event rates did not differ significantly between obese and normal-weight patients.Registration: URL: https://www.clinicaltrials.gov; Unique identifier: NCT04075084 and NCT04198220.

5.
Heart Rhythm O2 ; 4(2): 97-102, 2023 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-36873314

RESUMO

Background: Insertable cardiac monitors (ICMs) are increasingly used for cardiac rhythm diagnosis with expanding indications. Little has been reported about their use and efficacy. Objective: The study sought to evaluate the clinical utility of a novel ICM (Biotronik BIOMONITOR III) including the time to diagnosis in unselected patients with different ICM indications. Methods: Patients from 2 prospective clinical studies were included to determine the diagnostic yield of the ICM. The primary endpoint was time to clinical diagnosis per implant indication or to the first change in atrial fibrillation (AF) therapy. Results: A total of 632 patients were included with a mean follow-up of 233 ± 168 days. Of 384 patients with (pre)syncope, 34.2% had a diagnosis at 1 year. The most frequent therapy was permanent pacemaker implantation. Of 133 patients with cryptogenic stroke, 16.6% had an AF diagnosis at 1 year, resulting in oral anticoagulation. Of 49 patients with an indication for AF monitoring, 41.0% had a relevant change in AF therapy based on ICM data at 1 year. Of 66 patients with other indications, 35.4% received a rhythm diagnosis at 1 year. Moreover, 6.5% of the cohort had additional diagnoses: 26 of 384 patients with syncope, 8 of 133 patients with cryptogenic stroke, and 7 of 49 patients with AF monitoring. Conclusion: In a large unselected patient population with heterogeneous ICM indications, the primary endpoint of rhythm diagnosis was achieved in ∼1 in 4, and additional clinically relevant findings was achieved in 6.5% of patients at short-term follow-up.

6.
Sensors (Basel) ; 22(14)2022 Jul 11.
Artigo em Inglês | MEDLINE | ID: mdl-35890856

RESUMO

Automated vehicles are expected to push towards the evolution of the mobility environment in the near future by increasing vehicle stability and decreasing commute time and vehicle fuel consumption. One of the main limitations they face is motion sickness (MS), which can put their wide impact at risk, as well as their acceptance by the public. In this direction, this paper presents the application of motion planning in order to minimise motion sickness in automated vehicles. Thus, an optimal control problem is formulated through which we seek the optimum velocity profile for a predefined road path for multiple fixed journey time (JT) solutions. In this way, a Pareto Front will be generated for the conflicting objectives of MS and JT. Despite the importance of optimising both of these, the optimum velocity profile should be selected after taking into consideration additional objectives. Therefore, as the optimal control is focused on the MS minimisation, a sorting algorithm is applied to seek the optimum solution among the pareto alternatives of the fixed time solutions. The aim is that this solution will correspond to the best velocity profile that also ensures the optimum compromise between motion comfort, safety and driving behaviour, energy efficiency, journey time and riding confidence.


Assuntos
Condução de Veículo , Enjoo devido ao Movimento , Algoritmos , Humanos , Movimento (Física) , Meios de Transporte
7.
Sensors (Basel) ; 22(4)2022 Feb 18.
Artigo em Inglês | MEDLINE | ID: mdl-35214527

RESUMO

Mephedrone, also known as 4-methylmethcathinone, is growing into a prominent recreational drug for young people. When it came to detecting mephedrone, limited efforts were made using electrochemical sensors. As a result, this application depicts the fabrication of a new, sensitive, selective, and economical electrochemical sensor capable of detecting mephedrone by using silver nanoparticles capped with saffron produced through electropolymerization to modify carbon paste electrodes (CPEs). Silver nanoparticles (AgNPs) were capped with saffron (AgNPs@Sa) using a green method. AgNPs@Sa were studied using electron scanning microscopy (SEM) and UV-vis spectroscopy. The sensor was evaluated under the optimum condition to determine its analytical features. The results showed that this procedure had a wide linear range, low detection limit and sufficient reproducibility. Furthermore, the sensor posed sufficient stability. Moreover, it was applied in the determination of mephedrone in urine samples, showing the potential applicability of this electrochemical sensor in real sample analysis.


Assuntos
Crocus , Nanopartículas Metálicas , Adolescente , Carbono/química , Técnicas Eletroquímicas/métodos , Eletrodos , Humanos , Limite de Detecção , Nanopartículas Metálicas/química , Metanfetamina/análogos & derivados , Reprodutibilidade dos Testes , Prata/química
8.
Respir Med Case Rep ; 34: 101540, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34765435

RESUMO

Bronchogenic cysts are rare congenital anomalies that they are usually diagnosed prenatally during the routine second trimester scan. We present such a rare case of bronchogenic cyst in a fetus. Our initial scan demonstrated a big cystic mass, which enlarged progressively causing shifting of the mediastinum and compression of the fetal heart. Consequent hydrops fetalis was treated with thoracoamniotic shunt and the pregnancy continued with no further complications. Pontnatal period, surgery and long term follow-up was uneventful.

9.
J Pharmacol Toxicol Methods ; 108: 107054, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33775808

RESUMO

INTRODUCTION: Psoriasis, is a common, chronic, autoimmune, inflammatory, relapsing disease, which would benefit from reliable and human-relevant animal models to test drugs pre-clinically and to understand their mechanism of action. Because of its ease of use, convenience and low cost, the imiquimod (IMQ)-induced psoriasis-like model is widely utilized; however, it is not known whether all mouse strains are equivalent and if the hairless mouse is appropriate, so that the imiquimod model can be further optimized. METHODS: Under similar experimental conditions, common mouse strains (BALB/c, C57BL/6J, and ApoE) and a new hairless strain (ApoE/SKH-hr2) as well as several inducers (IMQ, IMQ + acetic acid (AcOH) topical and IMQ + AcOH systemic) were compared by clinical, histopathological, biophysical and locomotor activity assessments. RESULTS AND DISCUSSION: The BALB/c mice yielded an optimal psoriasis-like phenotype with IMQ + AcOH topical treatment, and the corresponding phenotypes for the other mouse strains were C57BL/6J moderate and ApoE mild. In contrast, the ApoE/SKH-hr2 mice, as a result of the absence of a Munro abscess in the histopathology analysis, left doubt about the psoriasis-like acquisition. Locomotor activity of BALB/c mice treated with IMQ, IMQ + AcOH topically and IMQ + AcOH systemically showed decreased distance and rearing coverage and increased immobility with all treatments. Hence, the BALB/c mouse strain appears to be an optimal psoriasis-like model when utilizing IMQ + AcOH topical application.


Assuntos
Psoríase , Animais , Modelos Animais de Doenças , Imiquimode/toxicidade , Camundongos , Camundongos Endogâmicos BALB C , Camundongos Endogâmicos C57BL , Psoríase/induzido quimicamente , Psoríase/tratamento farmacológico , Pele
10.
Mol Biol Rep ; 48(1): 807-815, 2021 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-33398681

RESUMO

Breast cancer is the most common form of cancer and the second highest cause of cancer mortality in female patients. The significance of the expression of Galectin-3 has been correlated with various malignancy types and in data from several research papers, the expression of Galectin-3 has been associated with the progression and metastasis of breast cancer. In the present study, the authors' goal is to identify whether the expression of Galectin-3 in breast cancer can be associated with the presence and/or recurrence of a metastatic disease. Both Scopus and PubMed databases were utilized, by inputting the following combination of keywords: (((Breast) AND Metastasis)) AND ((Galectin 3) OR Galectin-3). The time of publication and text availability were not considered when searching the databases and all relevant articles in English were initially accepted. We included one case-control study, three retrospective case studies and one retrospective cohort study. In two of the included studies, the levels in concentration of Galectin-3 were not correlated with a significant difference in prognosis. In two studies, the lacking in expression of Galectin-3 was associated with a worse prognosis and in one of the studies selected, the elevated levels of Galectin-3 were correlated with recurrence of disease in triple negative breast cancer cases. For most of the studies selected for this review, the results were contradictory in regard to the role of Galectin-3 for prognosis and metastatic potential in female breast cancer patients. It is still unclear, whether Galectin-3 can be used as a prognostic marker for advanced breast cancer disease.


Assuntos
Proteínas Sanguíneas/genética , Neoplasias da Mama/diagnóstico , Galectinas/genética , Recidiva Local de Neoplasia/diagnóstico , Adulto , Neoplasias da Mama/genética , Neoplasias da Mama/mortalidade , Neoplasias da Mama/patologia , Estudos de Coortes , Feminino , Expressão Gênica , Humanos , Metástase Linfática , Pessoa de Meia-Idade , Recidiva Local de Neoplasia/genética , Recidiva Local de Neoplasia/mortalidade , Recidiva Local de Neoplasia/patologia , Estadiamento de Neoplasias , Prognóstico , Análise de Sobrevida
11.
J Med Food ; 24(7): 749-755, 2021 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-33370175

RESUMO

Dyslipidemia is one of the most important cardiovascular disease (CVD) risk factors. Polyunsaturated fatty acids (FAs), and especially omega-3 FAs, could significantly contribute to the management of dyslipidemia and the prevention of CVD. The anti-hyperlipidemic effect of selected fish oils (eel, sardine, trout, cod liver) was comparatively evaluated in a high fat diet (HFD)-fed mouse model. At the end of 30 days on the HFD, all animals were hyperlipidemic and were switched to a diet consisting of 90% standard rodent chow plus 10% of oil from eel, sardine, cod liver, or trout. At the end of 60 days on these diets, blood glucose, total blood cholesterol, triglycerides (TGs), and high density lipoprotein (HDL) were quantitated. All diets, except sardine and standard rodent chow, showed statistically significant decreases in blood glucose from day 30 to 90. Total blood cholesterol decreased in all diets except the HFD group, which was continued on this diet until the end of the study. Eel and cod liver oil diets showed significant decreases in TGs. All dietary groups showed a decrease in HDL, but only the trout and standard chow groups exhibited statistically significant decreases. The fish oils tested here for effects on hyperlipidemia vary in per cent of omega-3 FAs and omega-6/-3 FA ratios as determined by gas chromatography Overall, smoked eel was the best source of omega-3 FA, with a balance of omega-6 FA, that ameliorated HFD-induced mixed hyperlipidemia.


Assuntos
Ácidos Graxos Ômega-3 , Hiperlipidemias , Animais , Enguias , Óleos de Peixe , Hiperlipidemias/tratamento farmacológico , Camundongos , Truta
12.
Cancer Genet ; 250-251: 1-5, 2021 01.
Artigo em Inglês | MEDLINE | ID: mdl-33188967

RESUMO

Paroxysmal nocturnal hemoglobinuria (PNH) is a rare life-threatening disease resulting from clonal hematopoietic stem cell evolution. There is a strong link between PNH and other acquired bone marrow failure syndromes, including myelodysplastic syndrome (MDS). Cytogenetic, morphological abnormalities or both are observed in the range of MDS/PNH diagnosis. Herein, we investigate cytogenetic abnormalities in PNH patients. We found two patients with PNH clones and MDS-associated abnormalities that later disappeared. The first patient, originally diagnosed with MDS and Trisomy 6, developed a large PNH clone. At the time of PNH diagnosis, the abnormal cytogenetic clone was no longer detectable despite persistent trilineage dysplasia. In the second patient, a large PNH clone and MDS-defining abnormality were detected at diagnosis, without evidence of dysplasia. No cytogenetic abnormalities were evident after complement inhibition. Our report adds significant information on the complex link between MDS and PNH, suggesting that distinction between these entities may be difficult in some cases. Especially in transplant eligible patients, the clinical phenotype may be the leading feature for treatment decisions in the era of complement inhibition. Lastly, the transient presence of cytogenetic abnormalities is a unique characteristic of our patients' course that needs to be further elucidated in larger studies.


Assuntos
Aberrações Cromossômicas , Hemoglobinúria Paroxística/genética , Síndromes Mielodisplásicas/genética , Adulto , Humanos , Hibridização in Situ Fluorescente , Cariotipagem , Masculino , Pessoa de Meia-Idade
13.
BMJ Open ; 10(9): e038791, 2020 09 30.
Artigo em Inglês | MEDLINE | ID: mdl-32998925

RESUMO

INTRODUCTION: Recurrent vasovagal syncope (VVS) is associated with decreased quality-of-life and frequent use of emergency services. The evidence base for causality, diagnostic procedures and potential VVS treatments is poor. Scattered observations in the literature suggest a link between respiratory disturbances during sleep and VVS. Empirical observations lead us to further hypothesise that the appropriate management of sleep apnoea syndrome (SAS) may help resolve comorbid recurrent VVS in certain patients. We therefore designed this pilot study to provide a framework for the observation of changes in outcomes accompanying the deployment of SAS treatments in patients with VVS. METHODS AND ANALYSIS: This is a multicentre, registry-based study whose primary objective is to evaluate the effect of SAS management on the number of syncope/presyncope episodes in a population suffering from both VVS and SAS. To this effect, syncope rates prior to the treatment of SAS will be compared with those occurring after the initiation of the latter. In addition, yearly assessments will collect data for echocardiography, polysomnography, Holter monitoring, table tilt tests, multiple sleep latency tests, SAS management parameters and questionnaires describing fatigue, depression and quality-of-life. Sixty patients will be included with a minimum follow-up period of 12 months. The primary analysis will use comparisons of centrality for paired data to describe the changes in syncope rates before versus after the initiation of SAS management. Longitudinal data will be analysed using mixed models with patients set as a random effect. Subgroup analyses will be performed for SAS-treatment adherence and efficacy. ETHICS AND DISSEMINATION: The VVS-SAS registry was approved by an ethics committee (Comité pour la Protection des Personnes Ile-de-France VI, Reference number CPP/2-18) in accordance with French law. The princeps publication will present before-after SAS management results and longitudinal analyses. TRIAL REGISTRATION NUMBER: NCT04294524. Pre-results.


Assuntos
Síndromes da Apneia do Sono , Síncope Vasovagal , Estudos de Coortes , França , Humanos , Projetos Piloto , Síndromes da Apneia do Sono/complicações , Síndromes da Apneia do Sono/terapia , Síncope Vasovagal/diagnóstico , Síncope Vasovagal/terapia
14.
In Vivo ; 34(4): 1835-1843, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32606153

RESUMO

BACKGROUND/AIM: Cigarette smoke (CS) is a major environmental health threat. The oxidative stress induced by CS on keratinocytes and the possible protective effect of nicotine, its receptor inhibitors, and Pinus halepensis bark extract in relation to known antioxidants were investigated. MATERIALS AND METHODS: Primary mouse keratinocytes were exposed to cigarette smoke in the presence and absence of Pinus halepensis bark extract (1 µg/ml), rutin (50 µM) and ascorbic acid (250 µM), nicotine (1 µM) with or without mecamylamine (5 µM) and α-bungarotoxin (0.1 µM). Keratinocyte viability and oxidative stress were evaluated by MTT and fluorescence assays. RESULTS: Pinus halepensis bark extract decreased the oxidative stress and increased the viability of keratinocytes, and moreover, these effects were more pronounced compared to the mixture of rutin and L-ascorbic acid. Nicotine significantly enhanced the viability potentiation of the beneficial effect induced by Pinus halepensis bark extract. Mecamylamine and α-bungarotoxin showed no specific effect. CONCLUSION: Pinus halepensis bark extract in combination with nicotine may successfully reverse skin damage induced by cigarette smoke.


Assuntos
Pinus , Animais , Queratinócitos , Camundongos , Nicotina/farmacologia , Estresse Oxidativo , Casca de Planta , Extratos Vegetais/farmacologia , Fumar
15.
Eur J Pharm Sci ; 127: 1-8, 2019 Jan 15.
Artigo em Inglês | MEDLINE | ID: mdl-30316976

RESUMO

Non-invasive biophysical methods were used to study the effect of antioxidant gels, which were prepared from Pinus halepensis bark extracts, vitamin C and water, on the skin of diabetic hairless mice irradiated with UV radiation of 1 and 2 minimal erythemal doses (MEDs). The calculated transepidermal water loss (TEWL) for diabetic mice was found to be fivefold higher on day 11 after irradiation, and in all cases, the TEWL values converged to their initial values on day 21. Both pinus and vitamin C gels inhibited the dehydration of the skin, while water gels did not show similar protection. At low dose of UV-irradiation (1 MED), vitamin C gels showed the best hydration, while by doubling the UV dose, pinus gels induced significant skin-protective effects. Upon irradiation, the mice treatment with pinus gel showed diminished inflammation in comparison with the other gels. Pinus also inhibited the hyperkeratosis of skin. As expected, 2 MEDs caused greater skin damage, such as inflammation, dryness, oxidative stress and rides (aging) compared to the damage induced by 1 MED.


Assuntos
Antioxidantes/farmacologia , Ácido Ascórbico/farmacologia , Pinus , Extratos Vegetais/farmacologia , Raios Ultravioleta/efeitos adversos , Vitaminas/farmacologia , Animais , Diabetes Mellitus Experimental , Géis , Masculino , Camundongos Pelados , Estresse Oxidativo/efeitos dos fármacos , Casca de Planta , Pele/efeitos dos fármacos , Pele/patologia , Envelhecimento da Pele/efeitos dos fármacos , Água/farmacologia
16.
J Am Heart Assoc ; 7(5)2018 02 23.
Artigo em Inglês | MEDLINE | ID: mdl-29475873

RESUMO

BACKGROUND: Central blood pressure (BP) is a promising marker to identify subjects with higher cardiovascular risk than expected by traditional risk factors. Significant results have been obtained in populations with high cardiovascular risk, but little is known about low-cardiovascular-risk patients, although the differences between central and peripheral BP (amplification) are usually greater in this population. The study aim was to evaluate central BP over 24 hours for cardiovascular event prediction in hypertensive subjects with low cardiovascular risk. METHODS AND RESULTS: Peripheral and central BPs were recorded during clinical visits and over 24 hours in hypertensive patients with low cardiovascular risk (Systematic Coronary Risk Evaluation ≤5%). Our primary end point is the occurrence of a cardiovascular event during follow-up. To assess the potential interest in central pulse pressure over 24 hours, we performed Cox proportional hazard models analysis and comparison of area under the curves using the contrast test for peripheral and central BP. A cohort of 703 hypertensive subjects from Bordeaux were included. After the first 24 hours of BP measurement, the subjects were then followed up for an average of 112.5±70 months. We recorded 65 cardiovascular events during follow-up. Amplification was found to be significantly associated with cardiovascular events when added to peripheral 24-hour pulse pressure (P=0.0259). The area under the curve of 24-hour central pulse pressure is significantly more important than area under the curve of office BP (P=0.0296), and there is a trend of superiority with the area under the curve of peripheral 24-hour pulse pressure. CONCLUSIONS: Central pulse pressure over 24 hours improves the prediction of cardiovascular events for hypertensive patients with low cardiovascular risk compared to peripheral pulse pressure.


Assuntos
Pressão Arterial , Monitorização Ambulatorial da Pressão Arterial , Doenças Cardiovasculares/fisiopatologia , Hipertensão/fisiopatologia , Adulto , Idoso , Doenças Cardiovasculares/diagnóstico , Doenças Cardiovasculares/epidemiologia , Feminino , França , Humanos , Hipertensão/diagnóstico , Hipertensão/epidemiologia , Masculino , Pessoa de Meia-Idade , Valor Preditivo dos Testes , Prognóstico , Estudos Prospectivos , Sistema de Registros , Medição de Risco , Fatores de Risco , Fatores de Tempo
17.
J Hum Hypertens ; 32(2): 114-121, 2018 02.
Artigo em Inglês | MEDLINE | ID: mdl-29255218

RESUMO

The hypothesis that vitamin D (25(OH)D) insufficiency plays a role in occurring of various disease has led to a rise in requests of dosages and to an increase of health-care costs. 25(OH)D insufficiency is associated with increased risk of cardiovascular disease and hypertension in many studies. Animal studies demonstrated that 25(OH)D insufficiency activates renin angiotensin system but corresponding humans data are limited. The aim of the study was to document relationship between 25(OH)D, blood pressure, and renin angiotensin system in hypertensive subjects. In all, 248 hypertensive individuals, 46.8 years (±14), were hospitalized for an etiological assessment of hypertension in this cross-sectional study over two calendar years. 25(OH)D, plasma renin activity, and aldosterone were determined in stringent conditions and blood pressure was measure. Statistical analyses were carried out to analyze the association between 25(OH)D, blood pressure, and renin angiotensin system using linear and logistic regressions with adjustments on relevant variables. In all, 80% of the studied population had a 25(OH)D insufficiency. There were no significant association between 25(OH)D and levels of systolic or diastolic blood pressure, plasma renin activity, and aldosterone whatever the statiscal method used after adjustment. 25(OH)D is not associated with blood pressure and renin angiontensin component in hypertensive subjects. These results corroborate the interventional studies which are for a large majority negatives. A new definition of the 25(OH)D insufficiency in general population is necessary.


Assuntos
Pressão Sanguínea , Hipertensão/sangue , Sistema Renina-Angiotensina , Deficiência de Vitamina D/complicações , Vitamina D/análogos & derivados , Adulto , Idoso , Estudos Transversais , Feminino , Humanos , Hipertensão/etiologia , Hipertensão/fisiopatologia , Masculino , Pessoa de Meia-Idade , Estudos Prospectivos , Vitamina D/sangue
18.
Skin Pharmacol Physiol ; 29(6): 324-331, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-28099963

RESUMO

Low-molecular-weight antioxidants are some of the most efficient agents of the skin defense mechanism against environmental factors, such as cosmic rays, smoke, and pollutants. The total skin concentrations of hydrophilic ascorbic and uric acids, as well as lipophilic α-tocopherol, ß-carotene, and ubiquinol-10 antioxidants were determined by an HPLC-EC detector from 18 biopsies of human nonmelanoma skin carcinomas and 18 biopsies from skin areas adjacent to carcinomas. No significant differences in the concentrations of lipophilic antioxidants in both carcinomas and normal-looking skin areas adjacent to carcinomas were observed. On the contrary, ascorbic and uric acid concentrations were found to be 18 and 36% lower in carcinomas than in normal-looking skin areas, respectively. No statistical significance was observed between antioxidant concentrations and age, sex, phototype, profession, site of tumor, frequency, and time of UV light exposure either. Accordingly the antioxidant concentrations in both cancerous skin and adjacent normal-looking areas were found to be much higher than in normal skin, in contrast to literature data.


Assuntos
Ácido Ascórbico/metabolismo , Neoplasias Cutâneas/metabolismo , Pele/metabolismo , Ubiquinona/análogos & derivados , Ácido Úrico/metabolismo , alfa-Tocoferol/metabolismo , beta Caroteno/metabolismo , Adulto , Idoso , Idoso de 80 Anos ou mais , Antioxidantes/química , Antioxidantes/metabolismo , Ácido Ascórbico/química , Carcinoma Basocelular/metabolismo , Carcinoma de Células Escamosas/metabolismo , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Peso Molecular , Ubiquinona/química , Ubiquinona/metabolismo , Ácido Úrico/química , alfa-Tocoferol/química , beta Caroteno/química
19.
Cytogenet Genome Res ; 147(2-3): 118-23, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-26681178

RESUMO

Complex chromosomal rearrangements (CCRs) are balanced or unbalanced structural rearrangements involving 3 or more cytogenetic break events on 2 or more different chromosomes. Here, we report a 7-year-old girl referred to our unit because of mild dysmorphic facial features, mild learning difficulties together with very mild mental retardation. Standard cytogenetic banding analysis revealed a de novo CCR involving chromosomes 1, 2 and 18. Further molecular investigation with aCGH revealed a cryptic interstitial deletion of 2.7 Mb in 18q22.1, which does not elicit a significant clinical phenotype. FISH was performed to confirm both molecular and cytogenetic results.


Assuntos
Deleção Cromossômica , Cromossomos Humanos Par 1/genética , Cromossomos Humanos Par 2/genética , Cromossomos Humanos Par 8/genética , Deficiências da Aprendizagem/genética , Translocação Genética , Anormalidades Múltiplas/genética , Criança , Quebra Cromossômica , Pontos de Quebra do Cromossomo , Hibridização Genômica Comparativa , Face/anormalidades , Saúde da Família , Feminino , Humanos , Hibridização in Situ Fluorescente , Deficiência Intelectual , Cariótipo , Masculino , Linhagem
20.
J Hypertens ; 33(10): 2150-5, 2015 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-26431194

RESUMO

OBJECTIVE: Atrial fibrillation is the most common arrhythmia, and confers a high risk of stroke and heart failure. Hypertension and ageing are two important risk factors of incident atrial fibrillation and are both associated with increased arterial stiffness. The possible relationship between arterial stiffness and atrial fibrillation is insufficiently documented and is probably complex. We tested these relations in a cohort of hypertensive patients. METHODS: The population belongs to a registry which includes patients referred before administration of antihypertensive treatment and fulfilling the following criteria: office blood pressure (BP) above 140/90 mmHg, essential hypertension, no history of cardiovascular events, type 1 diabetes or atrial fibrillation, 24-h ambulatory measurement of BP coupled with the measurement of timing of Korotkoff sounds to assess arterial stiffness [indexed theoretical value of QKD interval for a SBP of 100 mmHg, at heart rate (HR) of 60 b.p.m., indexed for height and QRS duration (QKDh)]. An echocardiographic examination was carried out at baseline in the majority of patients. Atrial fibrillation-free survival was analysed with a Cox model including sex, diabetes, smoking, hypercholesterolaemia, QKDh, average 24-h pulse pressure and mean BP, mean 24-h HR, BMI and left atrial diameter (LAD), when available. RESULTS: We included 853 patients and recorded 67 new onsets of atrial fibrillation (mean follow-up = 102 ±â€Š62 months). Analysis found three variables significantly and independently linked to the occurrence of atrial fibrillation: age, QKDh and 24-h average HR. When LAD was introduced (n = 480, 35 incident atrial fibrillation), three variables were linked to incident atrial fibrillation: age, QKDh and LAD. CONCLUSION: Arterial stiffness is a strong predictor of future atrial fibrillation in hypertensive patients, independently of age, 24-h pulse pressure and LAD.


Assuntos
Fibrilação Atrial/epidemiologia , Átrios do Coração/patologia , Hipertensão/fisiopatologia , Rigidez Vascular , Adulto , Fatores Etários , Idoso , Fibrilação Atrial/fisiopatologia , Pressão Sanguínea , Monitorização Ambulatorial da Pressão Arterial , Ecocardiografia , Eletrocardiografia , Hipertensão Essencial , Feminino , Frequência Cardíaca/fisiologia , Humanos , Masculino , Pessoa de Meia-Idade , Tamanho do Órgão , Fatores de Risco
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