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1.
Zhonghua Yu Fang Yi Xue Za Zhi ; 54(3): 289-293, 2020 Mar 06.
Artigo em Chinês | MEDLINE | ID: mdl-32187934

RESUMO

Objective: To understand the levels of Pb, Cd, As, Hg, Mn, and Se in maternal and umbilical cord blood, and to explore the transplacental transfer efficiency (TTE). Methods: From September 2010 to December 2013, a total of 773 pregnant women and their newborns (Laizhou Bay Birth Cohort) were recruited from a second grade hospital in the south bank of Laizhou Bay, Bohai, Shandong Province. According to different detection methods, the six measured elements are classified into three groups including the Hg measurement group (595 mother-newborn pairs), the Pb measurement group (534 mother-newborn pairs), and the Cd, As, Mn and Se measurement group (244 mother-newborn pairs). The demographic characteristics of pregnant women and their newborns were obtained by the questionnaire. The concentrations of elements in maternal and umbilical cord blood were detected and the TTE of each element (elemental concentration in cord blood/elemental concentration in maternal blood) was calculated. The correlation of elements between maternal and cord blood was analyzed using Spearman's rank correlation coefficient. Results: The mean±SD of maternal age, gestational week and newborn birth weight of 773 mother-infant pairs were (28.34±4.50) years, (39.47±1.39) weeks and (3 419.47±497.39) g respectively. The median concentrations of Pb, Cd, As, Hg, Mn and As in maternal and cord blood were 31.12 and 30.02, 1.19 and 0.47, 8.05 and 6.03, 0.69 and 1.26, 100.70 and 105.55, 127.25 and 115.00 µg/L, respectively. The TTE of Pb, Cd, As, Hg, Mn, and Se was 0.98, 0.41, 0.73, 1.73, 0.96 and 0.91, respectively. Pb, Cd, Hg, Mn, and Se showed a significant positive correlation between maternal blood and cord blood, with Spearman correlation coefficients of 0.397, 0.298, 0.698, 0.555, and 0.285 (all P values<0.001). Conclusion: Each element was commonly detected in maternal blood and cord blood. The TTE of Hg was the highest.


Assuntos
Cádmio/sangue , Sangue Fetal/química , Sangue Fetal/metabolismo , Chumbo/sangue , Manganês/sangue , Troca Materno-Fetal , Mercúrio/sangue , Selênio/sangue , Cordão Umbilical/química , Biomarcadores/análise , Biomarcadores/sangue , Feminino , Humanos , Recém-Nascido , Gravidez , Oligoelementos/análise , Oligoelementos/sangue , Cordão Umbilical/irrigação sanguínea
2.
J Int Soc Sports Nutr ; 16(1): 53, 2019 Nov 14.
Artigo em Inglês | MEDLINE | ID: mdl-31727101

RESUMO

BACKGROUND: The aim of this survey was to determine the effects of an aerobic physical training program of six months duration on the serum and urinary concentrations of essential trace elements among middle distance runners and untrained, non-sportsmen participants. METHODS: 24 well-trained, middle-distance (1500 and 5000 m), aerobic male runners (AG) were recruited at the beginning of their training season and 26 untrained males formed the control group (CG). All participants were from the same region of Spain, and all of them had been living in this area for at least two years. Serum and urine of samples of Cobalt (Co), Copper (Cu), Manganese (Mn), Molybdenum (Mo), Selenium (Se), Vanadium (V) and Zinc (Zn) were obtained at the beginning of the training season, and six months later, from all participants. All samples were analyzed with inductively coupled plasma mass spectrometry (ICP-MS). RESULTS: Two-way ANOVA showed significant differences relative to group effect in serum concentrations of Co, Cu, Mn, Mo, Se and Zn. Attending to time effect, there were differences in Mn (p = 0.003) and Zn (p = 0.001). The group x time interaction revealed differences only in the case of Mn (p = 0.04). In urine, significant differences between group were obtained in Co, Cu, Mn, Se and V. Time effect showed changes in Co, Cy, Mo and Se. Finally, the group and time interaction revealed significant differences in urinary Cu (p = 0.001), Mn (p = 0.01) and Se (p = 0.001). CONCLUSIONS: A six-month aerobic training program for well-trained athletes induced modifications in the body values of several minerals, a fact which may reflect adaptive responses to physical exercise. The obtained data could be interesting for physicians or coaches in order to consider specific modifications in sportsmen's diets as well as to determine specific nutritional supplementation strategies.


Assuntos
Condicionamento Físico Humano , Corrida , Fenômenos Fisiológicos da Nutrição Esportiva , Oligoelementos/sangue , Oligoelementos/urina , Adolescente , Estudos de Casos e Controles , Dieta , Humanos , Masculino , Metais/sangue , Metais/urina , Espanha , Fatores de Tempo , Adulto Jovem
3.
Vox Sang ; 114(8): 808-815, 2019 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-31625182

RESUMO

BACKGROUND AND OBJECTIVES: Smokers currently have no defined restrictions for blood donation. However, cigarette smoke contains toxic substances such as carbon monoxide (CO) and trace elements that can affect the packed red blood cells (PRBCs) quality and safety of transfusion. This study evaluated the effects of smoking on the concentration of essential and trace elements and on carboxyhemoglobin (COHb) levels in PRBCs from smoker donors. MATERIALS AND METHODS: A matched case-control study was conducted to compare COHb levels, determined by the CO-oximetry method, and levels of trace (Cd, Pb, Cr, Ni, As and Hg) and essential (Ca, Mg, Cu, Fe, Mn, Mo, Se and Zn) elements evaluated by inductively coupled plasma mass spectrometry, in PRBCs from smoker (n = 36) and non-smoker (n = 36) donors at Hospital de Clínicas de Porto Alegre, Brazil. RESULTS: Mean COHb level was 14 times higher in the PRBCs obtained from smoker donors (5·9 [4·0-9·1] vs. 0·4 [0·2-0·8]%). Cadmium (1·0 [1·0-1·8] µg/l vs. undetectable) and lead (27 [21-36] vs. 19 [14-26] µg/l) levels were significantly higher in the PRBCs from smokers. Moreover, except for molybdenum, levels of all essential elements were lower in smoker PRBCs. CONCLUSION: The PRBCs donated by smokers contain toxic elements that are probably not safe for transfusion in children. Our results might support changes in the current guidelines of blood banks to improve the transfusion safety through inclusion of inquiry about smoking in the clinical screening, labelling and reserve PRBCs from smoker donors for adults or less critical recipients.


Assuntos
Doadores de Sangue/estatística & dados numéricos , Fumantes/estatística & dados numéricos , Fumar/sangue , Oligoelementos/sangue , Reação Transfusional/epidemiologia , Adulto , Bancos de Sangue/normas , Estudos de Casos e Controles , Eritrócitos/química , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Fumar/epidemiologia
4.
J Anim Sci ; 97(11): 4475-4481, 2019 Nov 04.
Artigo em Inglês | MEDLINE | ID: mdl-31560759

RESUMO

Newly weaned, commercial Angus steers [body weight (BW) = 204 ± 19 kg; n = 24; 12 steers from dams administered an injectable trace mineral (MM; Mulimin90) and 12 steers from control (CON) dams] were utilized to determine the effects of maternal supplementation with an injectable trace mineral on the inflammatory response of subsequent steers subjected to a lipopolysaccharide (LPS) challenge at the initiation of a 42-d receiving period. On day -2 steers were weaned, and the following day, shipped 354 km to the Beef Cattle and Sheep Field Laboratory in Urbana, IL. On day 0, steers were administered an intravenous LPS challenge. Body temperature and blood samples were collected from steers prior to LPS administration (0 h) and again at 0.5, 1, 2, 3, 4, 5, and 6 h. Blood samples were analyzed for trace mineral and cortisol at 0 and 2 h and glucose, insulin, LPS-binding protein (LBP), interleukin-1ß (IL-1ß), interleukin-6 (IL-6), haptoglobin, ceruloplasmin, and fibrinogen at 0, 0.5, 1, 2, 3, 4, 5, and 6 h. Calf BW was collected at trial initiation and subsequently every 14 d. Dry matter intake was collected daily and average daily gain (ADG) and feed efficiency were assessed. Initial plasma Zn tended (P = 0.06) to be greater for MM steers. However, there was no difference (P ≥ 0.31) in trace mineral status or serum cortisol at any other time. Total area under the curve (TAUC) for body temperature was lesser (P > 0.01) for MM steers. Basal LBP concentrations and TAUC for LBP tended (P ≤ 0.10) to be greater for MM steers. Peak concentration of IL-6 tended (P = 0.09) to be reached earlier for CON steers. However, there was no difference (P ≥ 0.11) in glucose, insulin, IL-6, ceruloplasmin, haptoglobin, and fibrinogen concentrations between treatments. Calf performance and feed efficiency did not differ (P ≥ 0.17) between treatments except ADG from day 28 to 42, which was greater (P = 0.03) for CON steers. Maternal supplementation with an injectable trace mineral tended to improve steer plasma Zn status at 0 h and tended to increase basal concentrations of LBP and overall LBP production when steers were administered an LPS challenge. Additionally, MM steers exhibited a more favorable change in body temperature following LPS administration. However, injectable trace mineral supplementation of dams during gestation had minimal to no effect on cytokine and acute-phase protein concentrations, as well as overall calf performance and efficiency during a 42-d receiving period.


Assuntos
Bovinos/fisiologia , Suplementos Nutricionais/análise , Inflamação/veterinária , Oligoelementos/administração & dosagem , Ração Animal/análise , Animais , Peso Corporal/efeitos dos fármacos , Dieta/veterinária , Feminino , Hidrocortisona/sangue , Inflamação/prevenção & controle , Lipopolissacarídeos/administração & dosagem , Masculino , Gravidez , Ovinos , Oligoelementos/sangue
5.
J Trace Elem Med Biol ; 56: 31-37, 2019 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-31442951

RESUMO

INTRODUCTION: Eastern and North-Eastern regions of Kazakhstan are considered to be environmentally disadvantaged due to industrial pollution and activity of the former Semipalatinsk Nuclear Test Site. Ferrous metallurgy is represented by the world's largest ferroalloy plant located in Aksu. In addition to a ferroalloy plant, Aksu is the home for the largest thermal power plant in Kazakhstan. OBJECTIVE: Biomonitoring of 31 hair and blood trace elements (Ag, Ba, Be, Bi, Cs, Co, Ce, Cr, Cu, Eu, Gd, Hf, In, La, Li, Mn, Mo, Nb, Nd, Pb, Sc, Sn, Tl, Th, U, V, W, Y, Yb, Zn, and Zr) in non-occupationally exposed population residing in polluted areas of East Kazakhstan and Pavlodar regions. METHODS: Five case groups, residing in the vicinity to the former Semipalatinsk Nuclear Test Site (Akzhar, Borodulikha, and Karaul) or in proximity to industrial plants (Aksu and Ust-Kamenogorsk) have been assessed vs. controls from a rural settlement in Kurchum. In total, 204 hair and blood samples were analyzed by inductively coupled plasma mass spectrometry. RESULTS: The observed blood concentrations of trace elements were in agreement with earlier studies on residents of industrially polluted areas. Elevated levels of blood Ba, Mn, Pb, V, and Zn were detected in residents of Aksu and Ust-Kamenogorsk. The elemental composition of head hair was characterized by greater stability between the study sites. CONCLUSION: Residency near the former Semipalatinsk Test Site could be considered as safe, while the environmental status of industrial settlements appears to be rather adverse.


Assuntos
Poluição Ambiental/análise , Cabelo/química , Exposição Ocupacional/análise , Características de Residência , Oligoelementos/sangue , Adulto , Idoso , Feminino , Geografia , Humanos , Cazaquistão , Masculino , Pessoa de Meia-Idade
6.
J Trace Elem Med Biol ; 56: 81-89, 2019 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-31442958

RESUMO

INTRODUCTION: Environmental risk factors regrading rheumatoid arthritis (RA) have not been explored extensively. Selenium (Se), zinc (Zn) and copper (Cu) nutrients were reported to associate with RA, but the results were inconsistent. Therefore, we conduct present study to meta-analyze the relationship between serum Se, Zn and Cu and RA and review the potential mechanisms. METHODS: PubMed, Web of Science and Cochrane Library were comprehensively searched till October 1, 2018 for pertinent studies. Standard mean differences (SMDs) and 95% confident intervals (CIs) were calculated according to random effects model. RESULTS: Finally 41 literatures were included. Meta-analysis of 16 studies involving 806 RA patients and 959 health controls showed that serum Se (SMD = -1.04, 95% CI = -1.58 to -0.50) was decreased in RA patients, and 23 literatures with 1398 patients and 1299 controls reported serum Zn (SMD = -1.20, 95% CI = -1.74 to -0.67) was decreased. But serum Cu (SMD = 1.26, 95% CI = 0.63 to -1.89) was increased with 26 studies including 1723 patients and 1451 controls. Meta-regression reported that steroid use was positively related to serum level of Se in RA (ß = 0.041, 95% CI = 0.002 to 0.079). Differences in serum Se, Zn and Cu between rheumatoid arthritis patients and controls were all related with the geographical distribution. CONCLUSIONS: Patients with RA have significant decreased serum Se and Zn and increased serum Cu than health controls, suggesting potential roles of Se, Zn and Cu in the pathogenesis of RA. Patients and rheumatologist should give enough attention to the monitor of these elements during follow up.


Assuntos
Artrite Reumatoide/sangue , Oligoelementos/sangue , Adulto , Estudos de Casos e Controles , Criança , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Análise de Regressão
7.
Analyst ; 144(15): 4653-4660, 2019 Jul 22.
Artigo em Inglês | MEDLINE | ID: mdl-31257367

RESUMO

In this work, we introduce a high-throughput quantitative multi-element method for biological fluids enabled by omitting sample preparation and an analysis time of a few seconds per sample. For the first time, flow injection of an undiluted cerebrospinal fluid (CSF) was combined to state-of-the-art ICP-TOFMS detection for multi-element analysis. Owing to the low sample volume and trace element concentrations of the CSF, flow injection methods with only 5 µL sample intake were used in combination with an icpTOF 2R TOF-based ICP-MS instrument. Due to the lack of certified reference materials for CSF analysis, a validated method employing open vessel digestion of the CSF material in combination with ICP-sectorfield-MS analysis was carried out and used as a reference. Additionally, the performance of the flow injection ICP-TOFMS was cross-validated by flow injection quadrupole-based ICP-MS/MS analysis using both external calibration and isotope dilution strategies. In the latter case, the sample had to be injected several times because of the need for tailored gas conditions for different elements. Overall, flow injection of biological fluids delivered quantitative values, which were in excellent agreement with the gold standard established by ICP-SFMS demonstrating the capability of ICP-TOFMS analysis in terms of resolution and sensitivity for the accurate quantification of trace elements in biological samples.


Assuntos
Espectrometria de Massas em Tandem/métodos , Oligoelementos/líquido cefalorraquidiano , Animais , Calibragem , Análise de Injeção de Fluxo/métodos , Humanos , Limite de Detecção , Oligoelementos/sangue
8.
Anal Bioanal Chem ; 411(21): 5593-5603, 2019 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-31289896

RESUMO

A novel SBA-15-based fluorescent sensor, SBA-PI: mesoporous SBA-15 structure modified with iminostilbene groups, was designed, synthesized, and characterized by Fourier transform-infrared spectroscopy (FT-IR), ultraviolet-visible spectroscopy, field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDS), thermogravimetric analysis (TGA), low-angle X-ray diffraction techniques (low-angle XRD), and N2 adsorption-desorption techniques. The SBA-PI as a sensor with a selective behavior for detection of Cu2+ comprises iminostilbene carbonyl as the fluorophore group. The SBA-PI sensor displays an excellent fluorescence response in aqueous solutions and the fluorescence intensity quenches remarkably upon addition of Cu2+. Other common interfering ions even at high concentration ratio showed either no or very small changes in the fluorescence intensity of SBA-PI in the absence of Cu2+. A limit of detection of 8.7 × 10-9 M for Cu2+ indicated that this fluorescence sensor has a high sensitivity and selectivity toward the target copper (II) ion. The fabricated Cu2+ sensor was successfully applied for the determination of the Cu2+ in human blood samples without any significant interference. With the selective analysis of Cu2+ ions down to 0.9 nM in blood, the sensor is a promising and a novel detection candidate for Cu2+ and can be applied in the clinical laboratory. A reversibility and accuracy in the fluorescence behavior of the sensor was found in the presence of I¯ that was described as a masking agent for Cu2+. Graphical abstract.


Assuntos
Cobre/sangue , Espectroscopia de Infravermelho com Transformada de Fourier/métodos , Oligoelementos/sangue , Humanos , Concentração de Íons de Hidrogênio , Limite de Detecção , Microscopia Eletrônica de Varredura , Microscopia Eletrônica de Transmissão , Difração de Pó , Espectrometria por Raios X , Termogravimetria
9.
Artigo em Inglês | MEDLINE | ID: mdl-31261622

RESUMO

Human biomonitoring (HBM) programs consist of several interrelated and equally important steps. Of these steps, the study design must answer a specific question: How many individuals must be recruited in order to define the spatial or temporal trends of exposure to environmental pollutants in a given HBM study? Two components must be considered at this stage: the population variability of the expected exposure and the performance characteristics of the analytical methods used. The objective of the present study was to quantify the contribution to the required sample size arising from (i) measurement uncertainty and (ii) inter-laboratory measurement variability. For this purpose, the sample size was calculated using the measurement uncertainty of one laboratory, inter-laboratory comparison exercise data, and population variability for commonly studied metals (mercury, cadmium, and lead) in blood. Measurement uncertainty within one laboratory proved to have little influence on the sample size requirements, while the inter-laboratory variability of the three metals increased the requirements considerably, particularly in cases of low population variability. The multiple laboratories approach requires that laboratory variability be considered as early as the planning stage; a single-laboratory approach is thus a cost-effective compromise in HBM to reduce variability due to the participation of different laboratories.


Assuntos
/métodos , Oligoelementos/sangue , Monitoramento Ambiental/métodos , Poluentes Ambientais/sangue , Humanos , Metais/sangue
10.
J Trace Elem Med Biol ; 55: 121-126, 2019 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-31345349

RESUMO

INTRODUCTION: Inflammatory bowel disease (IBD), a chronic inflammatory disorder of gastrointestinal tract, arises from complex interaction between genetics, environment, gut microbiota and mucosal immune response. Along with clinical, endoscopic and radiological evaluation various biomarkers are needed as an additional diagnostic tool, as well as to predict disease course and therapeutic outcomes. AIM: The aim of this study was to evaluate clinical value of essential trace elements (ETEs) serum concentration profile in the assessment of pediatric IBD diseases development. MATERIALS AND METHODS: Concentration of five ETEs: iron (Fe), zinc (Zn), copper (Cu), manganese (Mn) and selenium (Se) in serum of 41 children with newly diagnosed IBD (27 CD and 14 UC) and 20 healthy controls were determined by inductively coupled plasma mass spectrometry (ICP-MS) and atomic fluorescence spectrometry (AFS) at the moment of diagnosis and after one year of treatment. RESULTS: The obtained results revealed significant differences in serum concentration profile of studied ETEs' for IBD pediatric patients and healthy controls. Decrease of iron, zinc and selenium and increase of copper and manganese serum concentration were observed in IBD patients at the time of diagnosis. The changes were reversible and after one year of treatment the studied ETEs serum concentration profile resembled much more that observed for healthy controls. Correlations between studied ETEs levels within cases (IBD, CD, UC) were also found to be different from those in healthy controls (HC). CONCLUSION: Although much more studies are required on the subject our results demonstrate a clinical value of ETEs serum concentration profile in pediatric IBD patients regarding disease development.


Assuntos
Progressão da Doença , Doenças Inflamatórias Intestinais/sangue , Oligoelementos/sangue , Adolescente , Criança , Pré-Escolar , Feminino , Humanos , Lactente , Doenças Inflamatórias Intestinais/diagnóstico , Masculino , Estudos Prospectivos
11.
Toxicol Mech Methods ; 29(9): 633-643, 2019 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-31354016

RESUMO

In this study, we aimed to investigate whether bisphenol A (BPA) and di-(2-ethylhexyl) phthalate (DEHP) exposure have any association with Hashimoto's thyroiditis (HT) and its biomarkers and to determine whether oxidative stress biomarkers and trace element levels showed any alterations in children with HT. We found that superoxide dismutase and glutathione peroxidase activities are lower in HT group from control (24% and 46%, respectively, p < 0.05). Zinc levels were significantly lower in HT group vs. control. In addition, the levels of mono-(2-ethylhexyl) phthalate (MEHP) which is the primary metabolite for DEHP, were markedly higher in HT group compared to control (p < 0.05). A negative correlation was observed between urinary BPA levels and fT4. In children with HT, oxidant/antioxidant balance is changed and these differences may be related by EDC exposure, the importance of which should be elucidated with further studies.


Assuntos
Compostos Benzidrílicos/sangue , Dietilexilftalato/sangue , Disruptores Endócrinos/sangue , Doença de Hashimoto/sangue , Estresse Oxidativo/efeitos dos fármacos , Fenóis/sangue , Oligoelementos/sangue , Adolescente , Compostos Benzidrílicos/toxicidade , Biomarcadores/sangue , Estudos de Casos e Controles , Criança , Dietilexilftalato/toxicidade , Disruptores Endócrinos/toxicidade , Exposição Ambiental/efeitos adversos , Exposição Ambiental/análise , Feminino , Doença de Hashimoto/epidemiologia , Humanos , Masculino , Fenóis/toxicidade , Turquia/epidemiologia
12.
Diabetes Metab Syndr ; 13(2): 933-938, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31336547

RESUMO

BACKGROUND AND OBJECTIVE: Obesity is an emerging public health concern in Bangladesh. This study aimed to find the levels of the serum malondialdehyde (MDA), non-enzymatic antioxidants (vitamin A, C and E), trace elements (zinc and iron) and macro-minerals (calcium, potassium and sodium) in obesity and its action in disease advancement. METHODS: Level of lipid peroxidation was estimated by measurement of the serum concentrations of malondialdehyde (MDA). Vitamin A and E concentration was found by RP-HPLC method and vitamin C was assessed for serum ascorbic acid by UV spectrophotometric method. Serum trace elements (Zn and Fe) and macro-minerals (Na, K and Ca) were estimated by Atomic Absorption Spectroscopy (AAS). RESULTS: Our study observed significantly elevated concentrations of MDA (p < 0.001) and depleted concentrations of antioxidants (vitamin A, E and C) (p < 0.05) in the patient than control group. Analysis of serum trace elements (Zn and Fe) and macro-minerals (Na, K and Ca) and found that the mean values of Zn, Fe, Na, K and Ca were 0.39 ±â€¯0.02 and 0.43 ±â€¯0.03, 3284.81 ±â€¯34.51, 162.18 ±â€¯3.72, 44.62 ±â€¯2.13 mg/L for the patient and 0.91 ±â€¯0.13, 0.88 ±â€¯0.06, 2562.74 ±â€¯95.92, 243.58 ±â€¯8.97, 87.66 ±â€¯2.10 mg/L for the controls, consequently. There was a substantial difference in trace elements and macro-minerals between the patients and controls (p < 0.001). CONCLUSION: Our study proposes that increased serum concentrations of MDA and decreased non-enzymatic antioxidant and altered trace elements and macro-minerals are powerfully related with obesity.


Assuntos
Antioxidantes/metabolismo , Biomarcadores/sangue , Malondialdeído/sangue , Minerais/sangue , Obesidade/sangue , Obesidade/epidemiologia , Oligoelementos/sangue , Bangladesh/epidemiologia , Estudos de Casos e Controles , Grupos Étnicos , Feminino , Seguimentos , Humanos , Masculino , Pessoa de Meia-Idade , Prognóstico
13.
BMC Neurol ; 19(1): 154, 2019 Jul 08.
Artigo em Inglês | MEDLINE | ID: mdl-31286894

RESUMO

BACKGROUND: Alzheimer's disease has become a public health crisis globally due to its increasing incidence. The purpose of this study was to establish an early warning model using artificial neural network (ANN) for early diagnosis of AD and to explore early sensitive markers for AD. METHODS: A population based nested case-control study design was used. 89 new AD cases with good compliance who were willing to provide urine and blood specimen were selected from the cohort of 2482 community-dwelling elderly aged 60 years and over from 2013 to 2016. For each case, two controls living nearby were identified. Biomarkers for AD in urine and blood, neuropsychological functions and epidemiological parameters were included to analyze potential risk factors of AD. Compared with logistic regression, k-Nearest Neighbor (kNN) and support vector machine (SVM) model, back-propagation neural network of three-layer topology structures was applied to develop the early warning model. The performance of all models were measured by sensitivity, specificity, accuracy, positive prognostic value (PPV), negative prognostic value (NPV), the area under curve (AUC), and were validated using bootstrap resampling. RESULTS: The average age of AD group was about 5 years older than the non-AD controls (P < 0.001). Patients with AD included a significantly larger proportion of subjects with family history of dementia, compared with non-AD group. After adjusting for age and gender, the concentrations of urinary AD7c-NTP and aluminum in blood were significantly higher in AD group than non-AD group (2.01 ± 1.06 vs 1.03 ± 0.43, 1.74 ± 0.62 vs 1.24 ± 0.41 respectively), but the concentration of Selenium in AD group (2.26 ± 0.59) was significantly lower than that in non-AD group (2.61 ± 1.07). All the models were established using 18 variables that were significantly different between AD patients and controls as independent variables. The ANN model outperformed the other classifiers. The AUC for this ANN was 0.897 and the model obtained the accuracy of 92.13%, the sensitivity of 87.28% and the specificity of 94.74% on the average. CONCLUSIONS: Increased risk of AD may be associated with higher age among senior citizens in urban communities. Urinary AD7c-NTP is clinically valuable for the early diagnosis. The established ANN model obtained a high accuracy and diagnostic efficiency, which could be a low-cost practicable tool for the screening and diagnosis of AD for citizens.


Assuntos
Doença de Alzheimer/diagnóstico , Peptídeos beta-Amiloides/sangue , Proteínas do Tecido Nervoso/urina , Fragmentos de Peptídeos/sangue , Oligoelementos/sangue , Idoso , Idoso de 80 Anos ou mais , Doença de Alzheimer/psicologia , Área Sob a Curva , Biomarcadores/sangue , Biomarcadores/urina , Estudos de Casos e Controles , Diagnóstico Precoce , Feminino , Humanos , Masculino , Sensibilidade e Especificidade
14.
Vopr Pitan ; 88(2): 58-63, 2019.
Artigo em Russo | MEDLINE | ID: mdl-31233689

RESUMO

The high incidence of chronic pancreatitis (CP) which arise at young people of working age, the development of serious complications are pushing for the development of new diagnostic methods and the search for effective ways to treat this disease. In this regard, a relevant and promising direction is the further study of the mechanisms of pathogenesis and the formation of trophological (including mineral) deficiency in CP, followed by the development of comprehensive programs for their correction. Aim is to study mineral status of patients with chronic pancreatitis, depending on their age. Material and methods. A sample of 218 patients (140 women, 78 men) with CP with exocrine insufficiency aged 18 to 72 years was examined. The control group consisted of 20 healthy individuals who underwent a planned outpatient examination. To assess the mineral status, macronutrients were determined photometrically, iron by the bathophenanthroline method, the remaining trace elements (Cu, Zn, Pb, Cd) were determined by atomic absorption spectrometry in blood serum. Results and discussion. Patients with CP at all age groups revealed a statistically significant (p<0.001) decrease in serum concentration of calcium, phosphorus, magnesium, potassium, copper, zinc, and iron compared to the level in healthy individuals, which increased with age. In the group of patients older than 60 years, the state of hypomineralemia was detected by the level of calcium, phosphorus, magnesium, potassium, copper, zinc, iron, which required correction of the mineral status. With increasing age of patients with CP, the content of toxic metals (lead and cadmium) increased compared with that in the group of healthy individuals. Сonclusions. The findings suggest that the age of patients with CP is a predictor of mineral deficiency and the accumulation of toxic elements, which must be considered when forming a complex treatment.


Assuntos
Envelhecimento/sangue , Minerais/sangue , Pancreatite Crônica/sangue , Oligoelementos/sangue , Adolescente , Adulto , Fatores Etários , Idoso , Envelhecimento/patologia , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Pancreatite Crônica/patologia
15.
Mar Pollut Bull ; 142: 85-92, 2019 May.
Artigo em Inglês | MEDLINE | ID: mdl-31232352

RESUMO

Heavy metals may adversely affect health in marine organisms. As top predators, sharks may be especially vulnerable to exposure over long lifespans. Here we evaluate plasma levels of 14 heavy metals and 12 trace elements in white sharks, Carcharodon carcharias, in South Africa to determine whether they are related to sex, body size, and/or body condition and other health parameters. High levels of mercury and arsenic were found in shark blood at levels considered toxic in other vertebrates. Heavy metal concentrations were not related to body size or sex. Metal concentrations were not related to body condition with exception of copper, which was positively correlated. Protective effects of elements such as selenium, zinc, and iron were not detected. No negative effects on health parameters, such as total leukocytes or granulocyte to lymphocyte ratios were observed. Results suggest that sharks may have protective mechanisms that mitigate harmful effects of heavy metal exposure, providing new opportunities for future studies.


Assuntos
Metais Pesados/sangue , Tubarões/sangue , Poluentes Químicos da Água/sangue , Animais , Arsênico/sangue , Tamanho Corporal , Ecotoxicologia/métodos , Feminino , Contagem de Leucócitos , Masculino , Mercúrio/sangue , Metais Pesados/toxicidade , Tubarões/fisiologia , África do Sul , Oligoelementos/sangue , Poluentes Químicos da Água/toxicidade
16.
Bratisl Lek Listy ; 120(5): 344-348, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31113196

RESUMO

OBJECTIVES: The aim of the study was to investigate the relationship between plasma microRNA expression levels, which are associated with lipid metabolism and serum trace element levels in patients with primary hyperlipidemia. METHODS: This study was performed on 46 (21M / 25F) primary hyperlipidemia patients aged 25-65 years and 37 (18 M/19 F) healthy people aged 25-65 years. RESULTS: The following miRNAs were upregulated: miR-33a-5p, miR-370-5p, miR-378a-3p, miR-27a-3p, miR-27a-5p and miR-335-5p. Additionally, the levels of Co (p < 0.001), Ni (p < 0.01), Cd (p < 0.001) were significantly higher and the level of Cr (p < 0.01), Fe (p < 0.05), Mn (p < 0.01), Se (p < 0.001) and Mo (p < 0.001) was significantly lower in the primary hyperlipidemic patients compared to the healthy people . Also, miR-33a-5p was negatively correlated with serum Cr levels in patients with primary hyperlipidemia (r = -0.376, p < 0.05). CONCLUSIONS: Our study demonstrates that miR-33a-5p and Cr element may regulate abnormal lipid homeostasis. Also, miR-370, miR-378, miR-27-a and miR-335 might aid in the identification of new therapies to treat patients with primary hyperlipidemia (Tab. 3, Ref. 36).


Assuntos
Hiperlipidemias , MicroRNAs , Oligoelementos , Adulto , Idoso , Cromo/sangue , Humanos , Hiperlipidemias/sangue , Hiperlipidemias/metabolismo , MicroRNAs/sangue , Pessoa de Meia-Idade , Oligoelementos/sangue
17.
Environ Health Prev Med ; 24(1): 35, 2019 May 17.
Artigo em Inglês | MEDLINE | ID: mdl-31101007

RESUMO

BACKGROUND: The effects of prenatal exposure to toxic elements on birth outcomes and child development have been an area of concern. This study aimed to assess the profile of prenatal exposure to toxic elements, arsenic (As), bismuth (Bi), cadmium (Cd), mercury (total mercury (THg), methylmercury (MHg), inorganic mercury (IHg)), lead (Pb), antimony (Sb) and tin (Sn), and essential trace elements, copper (Cu), selenium (Se) and zinc (Zn), using the maternal blood, cord blood and placenta in the Tohoku Study of Child Development of Japan (N = 594-650). METHODS: Inductively coupled plasma mass spectrometry was used to determine the concentrations of these elements (except mercury). Levels of THg and MeHg were measured using cold vapour atomic absorption spectrophotometry and a gas chromatograph-electron capture detector, respectively. RESULTS: Median concentrations (25th-75th) of As, Cd, Pb, Sb, Sn and THg in the maternal blood were 4.06 (2.68-6.81), 1.18 (0.74-1.79), 10.8 (8.65-13.5), 0.2 (0.06-0.40) and 0.2 (0.1-0.38) ng mL-1 and 5.42 (3.89-7.59) ng g-1, respectively. Median concentrations (25th-75th) of As, Cd, Pb, Sb, Sn and THg in the cord blood were 3.68 (2.58-5.25), 0.53 (0.10-1.25), 9.89 (8.02-12.5), 0.39 (0.06-0.92) and 0.2 (0.2-0.38) ng mL-1 and 9.96 (7.05-13.8) ng g-1, respectively. CONCLUSIONS: THg and Sb levels in the cord blood were twofold higher than those in the maternal blood. Cord blood to maternal blood ratios for As, Cd and Sb widely varied between individuals. To understand the effects of prenatal exposure, further research regarding the variations of placental transfer of elements is necessary.


Assuntos
Sangue Fetal/química , Exposição Materna/estatística & dados numéricos , Metais/sangue , Placenta/química , Gravidez/sangue , Oligoelementos/sangue , Adulto , Feminino , Humanos , Japão , Troca Materno-Fetal , Saúde da População Urbana
18.
J Zoo Wildl Med ; 50(1): 176-182, 2019 03 01.
Artigo em Inglês | MEDLINE | ID: mdl-31120676

RESUMO

Trace nutrients have been shown to play important health roles in both domestic and wild animals, but there has been little investigation into their values and effects in giant pandas (Ailuropoda melanoleuca). The goal of this study was to obtain serum vitamin and mineral values in a group of healthy, captive giant pandas (n = 4). Twenty-seven samples were obtained from the group from 2008 to 2012. Serum analytes measured included retinol, α-tocopherol, hydroxyvitamin D, cobalt (Co), copper (Cu), iron (Fe), manganese (Mn), molybdenum (Mo), selenium (Se), and zinc (Zn). The diet was evaluated for protein, fat, fiber, Ca, P, magnesium (Mg), potassium (K), sodium (Na), Fe, Zn, Cu, Mn, and Mo. Comparison with other giant panda nutrient values were made. Further research with increased sample sizes and different populations are warranted.


Assuntos
Dieta/veterinária , Nutrientes/sangue , Estado Nutricional , Oligoelementos/sangue , Ursidae/sangue , Animais , Animais de Zoológico/sangue , Feminino , Masculino , Avaliação Nutricional
19.
J Trace Elem Med Biol ; 54: 221-225, 2019 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-31109616

RESUMO

In order to assess the individual trace element status of humans for either medical or scientific purposes, amongst others, blood serum levels are determined. Furthermore, animal models are used to study interactions of trace elements. Most published methods require larger amounts (500-1000 µL) of serum to achieve a reliable determination of multiple trace elements. However, oftentimes, these amounts of serum cannot be dedicated to a single analysis and the amount available for TE-determination is much lower. Therefore, a published ICP-MS/MS method for trace element determination in serum was miniaturized, optimized and validated for the measurement of Mn, Fe, Cu Zn, I and Se in as little as 50 µL of human and murine serum and is presented in this work. For validation, recoveries of multiple LOTs and levels from commercially available human reference serum samples were determined, intra- and inter-day variations were assessed and limits of detection and quantification determined. It is shown, that the method is capable of giving accurate and reproducible results for all six elements within the relevant concentration ranges for samples from humans living in central Europe as well as from laboratory mice. As a highlight, the achieved limits of detection and quantification for Mn were found to be at 0.02 µg/L serum and 0.05 µg/L serum, respectively, while using an alkaline diluent for the parallel determination of iodine.


Assuntos
Espectrometria de Massas em Tandem/métodos , Oligoelementos/sangue , Animais , Cobre/sangue , Humanos , Iodo/sangue , Ferro/sangue , Manganês/sangue , Camundongos , Selênio/sangue , Zinco/sangue
20.
Theriogenology ; 133: 97-103, 2019 Jul 15.
Artigo em Inglês | MEDLINE | ID: mdl-31078069

RESUMO

The role of oxidative stress in the control of female reproduction has not been fully elucidated in ruminants; however, it seems that antioxidants can make influence to the reproductive axis at different levels. Therefore, the aim of this study was to determine the relationship between antioxidant status and concentrations of trace minerals (chromium (Cr), copper (Cu), iron (Fe), and zinc (Zn)) with postpartum luteal activity and fertility in Holstein dairy cows. The cows (n = 100, a parity range of 2-5, and a body condition score (BCS) of 3.0 ±â€¯0.25, mean ±â€¯SEM) were assigned to the experiment at second week post calving. Ovarian follicular dynamics were monitored twice a week (from 3rd to 6th weeks post calving) by transrectal ultrasonography (US). Blood samples were collected twice weekly from the 3rd to the 6th weeks post calving at timed artificial insemination (TAI), and days 32 and 50 post AI to determine superoxide dismutase (SOD), glutathione peroxidase (GPX), total antioxidant capacity (TAC), and trace mineral concentrations. There were associations between plasma concentrations of SOD, GPX, and TAC with postpartum luteal activity (PLA, P = 0.01) and ovulation (P = 0.03). Mean plasma SOD and GPX activities and TAC levels (U/mL) were greater in cows with normal luteal activity (NLA) than prolonged luteal phase (PLP) and anovulation (AO) cows, as well as in ovulated compared to AO cows (P = 0.03). Pregnant cows had greater levels of SOD, GPX, and TAC (U/mL) at TAI than non-pregnant cows (P = 0.01). Plasma Cu and Zn concentrations increased in pregnant compared to non-pregnant cows at TAI. In conclusion, antioxidant levels and Cu and Zn concentrations were associated with PLA and fertility.


Assuntos
Aborto Animal , Antioxidantes/metabolismo , Corpo Lúteo/fisiologia , Oligoelementos/sangue , Animais , Bovinos , Cromo/sangue , Cobre/sangue , Corpo Lúteo/metabolismo , Feminino , Glutationa Peroxidase/sangue , Inseminação Artificial/veterinária , Ferro/sangue , Período Pós-Parto/metabolismo , Gravidez , Superóxido Dismutase/sangue , Zinco/sangue
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