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1.
J Clin Microbiol ; 61(12): e0076023, 2023 12 19.
Artigo em Inglês | MEDLINE | ID: mdl-37966225

RESUMO

Neurocysticercosis (NCC) is the most common helminthic infection of the human central nervous system. The antibody detection assay of choice is the enzyme-linked immunoelectrotransfer blot assay using lentil-lectin purified parasite antigens (LLGP-EITB, Western blot), an immunoassay with exceptional performance in clinical samples. However, its use is mainly restricted to a few research laboratories because the assay is labor-intensive and requires sophisticated equipment, expertise, and large amounts of parasite material for preparation of reagents. We report a new immunoprint assay (MAPIA) that overcomes most of these barriers. We initially compared the performance of five different antigen combinations in a subset of defined samples in the MAPIA format. After selecting the best-performing assay format (a combination of rGP50 + rT24H + sTs14 antigens), 148 archived serum samples were tested, including 40 from individuals with parenchymal NCC, 40 with subarachnoid NCC, and 68 healthy controls with no evidence of neurologic disease. MAPIA using three antigens (rGP50 + rT24H + sTs14) was highly sensitive and specific for detecting antibodies in NCC. It detected 39 out of 40 (97.5%) parenchymal NCC cases and 40/40 (100%) subarachnoid cases and was negative in 67 out of 68 (98.53%) negative samples. MAPIA using three recombinant and synthetic antigens is a simple and economical tool with a performance equivalent to the LLGP-EITB assay for the detection of specific antibodies to NCC. The MAPIA overcomes existing barriers to adoption of the EITG LLGP and is a candidate for worldwide use.


Assuntos
Neurocisticercose , Taenia solium , Animais , Humanos , Neurocisticercose/diagnóstico , Neurocisticercose/parasitologia , Peru , Antígenos de Helmintos , Sensibilidade e Especificidade , Imunoensaio , Ensaio de Imunoadsorção Enzimática , Anticorpos Anti-Helmínticos
2.
Theor Appl Genet ; 136(4): 72, 2023 Mar 23.
Artigo em Inglês | MEDLINE | ID: mdl-36952017

RESUMO

KEY MESSAGE: Here, we provide an updated set of guidelines for naming genes in wheat that has been endorsed by the wheat research community. The last decade has seen a proliferation in genomic resources for wheat, including reference- and pan-genome assemblies with gene annotations, which provide new opportunities to detect, characterise, and describe genes that influence traits of interest. The expansion of genetic information has supported growth of the wheat research community and catalysed strong interest in the genes that control agronomically important traits, such as yield, pathogen resistance, grain quality, and abiotic stress tolerance. To accommodate these developments, we present an updated set of guidelines for gene nomenclature in wheat. These guidelines can be used to describe loci identified based on morphological or phenotypic features or to name genes based on sequence information, such as similarity to genes characterised in other species or the biochemical properties of the encoded protein. The updated guidelines provide a flexible system that is not overly prescriptive but provides structure and a common framework for naming genes in wheat, which may be extended to related cereal species. We propose these guidelines be used henceforth by the wheat research community to facilitate integration of data from independent studies and allow broader and more efficient use of text and data mining approaches, which will ultimately help further accelerate wheat research and breeding.


Assuntos
Melhoramento Vegetal , Triticum , Triticum/genética , Fenótipo , Genes de Plantas , Grão Comestível/genética
3.
J Dairy Sci ; 106(12): 8611-8626, 2023 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-37641244

RESUMO

We evaluated the effects of supplementing bacterial direct-fed microbial (DFM) on performance, apparent total-tract digestibility, rumen fermentation, and immune parameters of lactating dairy cows. One hundred fourteen multiparous Holstein cows (41 ± 7 DIM) were used in a randomized complete block design with an experiment comprising 14 d of a covariate (pre-experimental sample and data collection) and 91 d of an experimental period. Cows were blocked based on energy-corrected milk (ECM) yield during the covariate period and the following treatments were randomly assigned within each block: (1) control (CON), corn silage-based total mixed ration without DFM; (2) PRO-A, basal diet top-dressed with a mixture of Lactobacillus animalis and Propionibacterium freudenreichii at 3 × 109 cfu/d; and 3) PRO-B, basal diet top-dressed with a mixture of L. animalis, P. freudenreichii, Bacillus subtilis, and Bacillus licheniformis at 11.8 × 109 cfu/d. Milk yield, dry matter intake (DMI), and body weight were measured daily, while milk samples for component analysis were taken on 2 consecutive days of each week of data collection. Feces, urine, rumen, and blood samples were taken during the covariate period, wk 4, 7, 10, and 13 for estimation of digestibility, N-partitioning, rumen fermentation, plasma nutrient status and immune parameters. Treatments had no effect on DMI and milk yield. Fat-corrected milk (3.5% FCM) and milk fat yield were improved with PRO-B, while milk fat percent and feed efficiency (ECM/DMI) tended to increase with PRO-B compared with PRO-A and CON. Crude fat digestibility was greater with PRO-B compared with CON. Feeding CON and PRO-A resulted in higher total volatile fatty acid concentration relative to PRO-B. Percentage of neutrophils tended to be reduced with PRO-A compared with CON and PRO-B. The mean fluorescence intensity (MFI) of anti-CD44 antibody on granulocytes tended to be higher in PRO-B compared with CON. The MFI of anti-CD62L antibody on CD8+ T cells was lower in PRO-A than PRO-B, with PRO-A also showing a tendency to be lower than CON. This study indicates the potential of DFM to improve fat digestibility with consequential improvement in fat corrected milk yield, feed efficiency and milk fat yield by lactating dairy cows. The study findings also indicate that dietary supplementation with DFM may augment immune parameters or activation of immune cells, including granulocytes and T cells; however, the overall effects on immune parameters are inconclusive.


Assuntos
Ração Animal , Lactação , Feminino , Bovinos , Animais , Lactação/fisiologia , Ração Animal/análise , Leite , Dieta/veterinária , Digestão , Suplementos Nutricionais/análise , Rúmen
4.
Med Vet Entomol ; 36(1): 43-55, 2022 03.
Artigo em Inglês | MEDLINE | ID: mdl-34618943

RESUMO

Aedes (Stegomyia) aegypti (L.) (Diptera: Culicidae) is the vector of multiple arboviruses. To evaluate the association between environmental factors and the oviposition activity of Ae. aegypti in Argentina, data on the presence and abundance of eggs were collected using ovitraps, between September of 2018 and May of 2019, in the cities of Villa María, Río Cuarto and Salsipuedes (Córdoba province, Argentina). We analysed the relationships between oviposition and five environmental factors: Temperature, precipitation, vegetation cover, human population density and distance to sites with a potential high density of larval habitats, like cemeteries and trash dumps. Environmental factors' data were collected using satellite image products. The oviposition activity was randomly distributed in three cities. Using generalized linear mixed models, we show that the house where each ovitrap was placed was a source of variability in oviposition, suggesting the relevance of microsite factors and the importance of domestic control actions. Ae. aegypti oviposition was positively correlated with night-time temperature of the previous 3 weeks, and in a context-dependent manner, it was positively correlated with human population density, vegetation cover and precipitation. The consistency and magnitude of these relationships varied between cities, indicating that oviposition is related to a complex system of environmental variables.


Assuntos
Aedes , Animais , Argentina , Feminino , Larva , Mosquitos Vetores , Oviposição
5.
Anaerobe ; 78: 102638, 2022 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-36210608

RESUMO

Clostridioides difficile infection (CDI) is a significant worry within healthcare institutions and the community. It is one of the leading agents causing severe diarrhea worldwide. Effective management is critical since the morbidity and mortality attributed to CDI have increased exponentially over the past 20 years. Currently, antibiotics are the standard treatment for primary C. difficile infection, but at the same time, they are associated with disease relapse and increased drug resistance. CDI's high recurrence rates, spore generation, and antimicrobial resistance are currently significant challenges that urge the development of new options to combat this infection. This review describes up-and-coming alternatives and how they can mitigate the challenges associated with CDI. Here we have discussed the advantages and challenges of current and experimental alternatives against CDI.


Assuntos
Clostridioides difficile , Infecções por Clostridium , Humanos , Infecções por Clostridium/tratamento farmacológico , Infecções por Clostridium/epidemiologia , Infecções por Clostridium/prevenção & controle , Antibacterianos/uso terapêutico , Antibacterianos/farmacologia , Diarreia/tratamento farmacológico , Recidiva
6.
Clin Exp Immunol ; 201(3): 279-288, 2020 09.
Artigo em Inglês | MEDLINE | ID: mdl-32443171

RESUMO

Solid tumors elicit suppressive T cell responses which impair antigen-presenting cell (APC) functions. Such immune suppression results in uncontrolled tumor growth and mortality. Addressing APC dysfunction, dendritic cell (DC)-mediated anti-tumor vaccination was extensively investigated in both mice and humans. These studies never achieved full resistance to tumor relapse. Herein, we describe a repetitive RM-1 murine tumor rechallenge model for recurrence in humans. Using this newly developed model, we show that priming with tumor antigen-pulsed, Toll-like receptor (TLR)2 ligand-activated DCs elicits a host-protective anti-tumor immune response in C57BL/6 mice. Upon stimulation with the TLR2 ligand peptidoglycan (PGN), the tumor antigen-pulsed DCs induce complete resistance to repetitive tumor challenges. Intra-tumoral injection of PGN reduces tumor growth. The tumor resistance is accompanied by increased expression of interleukin (IL)-27, T-box transcription factor TBX21 (T-bet), IL-12, tumor necrosis factor (TNF)-α and interferon (IFN)-γ, along with heightened cytotoxic T lymphocyte (CTL) functions. Mice primed four times with PGN-stimulated tumor antigen-pulsed DCs remain entirely resistant to repeat challenges with RM-1 tumor cells, suggesting complete prevention of relapse and recurrence of tumor. Adoptive transfer of T cells from these mice, which were fully protected from RM-1 rechallenge, confers anti-tumor immunity to syngeneic naive recipient mice upon RM-1 challenge. These observations indicate that PGN-activated DCs induce robust host-protective anti-tumor T cells that completely resist tumor growth and recurrence.


Assuntos
Vacinas Anticâncer/imunologia , Células Dendríticas/imunologia , Imunoterapia Adotiva/métodos , Neoplasias da Próstata/imunologia , Linfócitos T Citotóxicos/imunologia , Animais , Antígenos de Neoplasias/imunologia , Antígenos de Neoplasias/metabolismo , Citocinas/metabolismo , Células Dendríticas/transplante , Modelos Animais de Doenças , Humanos , Mediadores da Inflamação/metabolismo , Masculino , Camundongos , Camundongos Endogâmicos C57BL , Recidiva Local de Neoplasia , Peptidoglicano/metabolismo , Receptor 2 Toll-Like/agonistas , Carga Tumoral
7.
Opt Express ; 27(5): 6459-6470, 2019 Mar 04.
Artigo em Inglês | MEDLINE | ID: mdl-30876231

RESUMO

Structured light has been created by a myriad of near-and far-field techniques and has found both classical and quantum applications. In the case of orbital angular momentum (OAM), continuous spiral phase patterns in dynamic or geometric phase are often employed with the phase patterns existing across the entire transverse plane. Here, we exploit the uncertain relationship between OAM and angle in order to create structured OAM fields by using multilevel OAM holograms. We show theoretically and experimentally that only a multilevel angular phase contour in the near-field is needed to create structured OAM light in the far-field, exploiting the reciprocal nature of angular momentum and angle. We use this approach to demonstrate exotic 3D structured light control to show the Poynting vector's evolution in such fields and to highlight the physics underlying this phenomenon.

8.
Nephrol Dial Transplant ; 32(2): 364-370, 2017 02 01.
Artigo em Inglês | MEDLINE | ID: mdl-28186570

RESUMO

Background: Recent randomized controlled trials suggest that sufficiently high convection post-dilutional haemodiafiltration (HC-HDF) improves survival in dialysis patients, consequently this technique is increasingly being adopted. However, when performing HC-HDF, rigorous control systems of the ultrafiltration setting are required. Assessing the global ultrafiltration coefficient of the dialysis system [GKD-UF; defined as ultrafiltration rate (QUF)/transmembrane pressure] or water permeability may be adapted to the present dialysis settings and be of value in clinics. Methods: GKD-UF was determined and its reproducibility, variability and influencing factors were specifically assessed in 15 stable patients routinely treated by high-flux haemodialysis or HC-HDF in a single unit. Results: GKD-UF invariably followed a parabolic function with increasing QUF in dialysis and both pre- and post-dilution HC-HDF (R2 constantly >0.96). The vertex of the parabola, GKD-UF-max and related QUF were very reproducible per patient (coefficient of variation 3.9 ± 0.6 and 3.3 ± 0.3%, respectively) and they greatly varied across patients (31­42 mL/h−1/mmHg and 82­100 mL/min, respectively). GKD-UF-max and its associated QUF decreased during dialysis treatment (P < 0.01). The GKD-UF-max decrease was related to weight loss (R2 = 0.66; P = 0.0015). Conclusions: GKD-UF is a reliable and accurate method to assess the water permeability of a system in vivo. It varies according to dialysis setting and patient-related factors. It is an objective parameter evaluating the forces driving convection and identifies any diversion of the system during the treatment procedure. It is applicable to low- or high-flux dialysis as well as pre- or post-dilution HDF. Thus, it may be used to describe the characteristics of a dialysis system, is suitable for clinical use and may be of help for personalized prescription.


Assuntos
Hemodiafiltração/métodos , Diálise Renal/métodos , Água , Convecção , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Permeabilidade , Estudos Prospectivos , Qualidade de Vida , Ultrafiltração
9.
J Nanosci Nanotechnol ; 17(1): 711-19, 2017 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-29633809

RESUMO

Currently pathogen microorganisms, presents in wastewater, are more resistant to conventional disinfection process, due to its constant change induced for the antibiotic for human diseases. One of the new options for the pathogen microorganisms is the heterogeneous photocatalysis, which has been used for remove microorganism, but never in real wastewater effluent. This paper shown the synthesis of Ag­TiO2 nanoparticles, its physical characterization was carried out by TEM, SEM, S-BET, XPS and band gap measurement by UV-vis spectroscopy showing that Ag­TiO2 are spherical particles with sizes around 50 nm with 1 and 10 %w of Ag, and a significant decrease in the band gap. The disinfection system was illuminated using the solar radiation of a spring day at Querétaro, Mexico, in lapses from 11:00 am to 03:00 pm; the microbiological tests were performed according to the Official Mexican Norm (NOM-003-SEMARNAT-1996), the results shows that after 3 hours of solar photocatalysis disinfection process the material 1 %w Ag­TiO2 at 0.2 gL⁻¹, removes the fecal and total coliform microorganisms from effluent, leaving Enterobacter, Escherichia, Citrobacter, Salmonella and Klebsiella microorganisms alive due to its capability of reactivation.

10.
Mol Psychiatry ; 20(11): 1294-300, 2015 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-26324103

RESUMO

We have sequenced the complete genomes of 72 individuals affected with early-onset familial Alzheimer's disease caused by an autosomal dominant, highly penetrant mutation in the presenilin-1 (PSEN1) gene, and performed genome-wide association testing to identify variants that modify age at onset (AAO) of Alzheimer's disease. Our analysis identified a haplotype of single-nucleotide polymorphisms (SNPs) on chromosome 17 within a chemokine gene cluster associated with delayed onset of mild-cognitive impairment and dementia. Individuals carrying this haplotype had a mean AAO of mild-cognitive impairment at 51.0 ± 5.2 years compared with 41.1 ± 7.4 years for those without these SNPs. This haplotype thus appears to modify Alzheimer's AAO, conferring a large (~10 years) protective effect. The associated locus harbors several chemokines including eotaxin-1 encoded by CCL11, and the haplotype includes a missense polymorphism in this gene. Validating this association, we found plasma eotaxin-1 levels were correlated with disease AAO in an independent cohort from the University of California San Francisco Memory and Aging Center. In this second cohort, the associated haplotype disrupted the typical age-associated increase of eotaxin-1 levels, suggesting a complex regulatory role for this haplotype in the general population. Altogether, these results suggest eotaxin-1 as a novel modifier of Alzheimer's disease AAO and open potential avenues for therapy.


Assuntos
Doença de Alzheimer/genética , Quimiocina CCL11/genética , Polimorfismo de Nucleotídeo Único/genética , Adulto , Idade de Início , Idoso , Doença de Alzheimer/sangue , Doença de Alzheimer/complicações , Quimiocina CCL11/sangue , Cromossomos Humanos Par 17/genética , Transtornos Cognitivos/etiologia , Transtornos Cognitivos/genética , Estudos de Coortes , Ensaio de Imunoadsorção Enzimática , Feminino , Estudo de Associação Genômica Ampla , Genótipo , Humanos , Masculino , Pessoa de Meia-Idade
11.
Exp Appl Acarol ; 68(4): 441-53, 2016 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-26715542

RESUMO

It is widely acknowledged that intraguild predation (IGP) occurs frequently between species of phytoseiid mites. However, in the presence of a shared resource many species of phytoseiid mites considerably reduce, or even cease, predation on each other. That being the case, IGP would then be minimal, or non-existent, and its theoretical effects on communities negligible. The aim of this work was two-fold. On the one hand, we aimed at determining the occurrence of IGP between two species of phytoseiid mites that inhabit avocado agro-ecosystems (Euseius stipulatus and E. scutalis) while considering the influence of abiotic conditions. On the other hand, we aimed at evaluating the occurrence of IGP between species of phytoseiid mites through a literature search of studies to determine whether methodologies and results in these papers supported the extended idea of IGP being widespread in the Phytoseiidae family. Our results suggested that in the presence of the shared resource predation on the IG-prey was negligible and both species seem to forage preferentially on pollen. Therefore, the interaction that most likely drives the dynamics of these two species in the field is exploitative resource competition. The literature search revealed that caution should be taken when assuming that IGP between phytoseiid mites is widespread, because only few works used experimental set ups with the adequate array of treatments allowing to assess whether IG-predators fed or not on both the IG-prey and the shared resource.


Assuntos
Ácaros/fisiologia , Comportamento Predatório , Animais , Ecossistema , Comportamento Alimentar , Feminino , Espanha
12.
Liver Int ; 35(4): 1451-63, 2015 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-24517519

RESUMO

BACKGROUND & AIMS: Mammalian target of rapamycin and angiotensin-converting enzyme inhibition has been shown to have antifibrotic activity in models of liver fibrosis. The aim of our study was to determine the efficacy of rapamycin, everolimus, irbesartan and captopril, alone and in combination, as antifibrotic agents in the Mdr2(-/-) model of cholestasis both in early injury and established disease. METHODS: Mdr2(-/-) mice were treated for 4 weeks with vehicle, rapamycin (1 mg/kg) or everolimus (5 mg/kg) every second day or with captopril (30 mg/kg/day), irbesartan (10 mg/kg/day) or vehicle. Further groups of 3-week-old Mdr2(-/-) mice were treated with rapamycin and irbesartan in combination (1 mg/kg/day and 10 mg/kg/day) or with rapamycin (2 mg/kg/day) for 4 weeks. Liver injury and fibrosis were compared between treated and untreated animals. RESULTS: There were no significant improvements in liver injury, histology, hepatic hydroxyproline or profibrogenic gene expression following treatment with rapamycin, everolimus, captopril or irbesartan at any time point studied. Likewise, there were no improvements in liver histology or profibrogenic gene expression following combination therapy or high-dose rapamycin treatment. CONCLUSIONS: The antifibrotic effects of rapamycin, everolimus, captopril and irbesartan seen in other models of fibrosis were not replicated in the Mdr2(-/-) model in this study. This highlights the clear need to test specific antifibrotic agents in a number of different animal models. We believe this animal model is ideal to study usefulness of antifibrotic agents in cholestatic liver disease because of the similarity in genetics and hepatic histopathology to human cholestatic liver disease.


Assuntos
Subfamília B de Transportador de Cassetes de Ligação de ATP/deficiência , Bloqueadores do Receptor Tipo 1 de Angiotensina II/farmacologia , Inibidores da Enzima Conversora de Angiotensina/farmacologia , Cirrose Hepática Experimental/tratamento farmacológico , Fígado/efeitos dos fármacos , Inibidores de Proteínas Quinases/farmacologia , Sistema Renina-Angiotensina/efeitos dos fármacos , Serina-Treonina Quinases TOR/antagonistas & inibidores , Subfamília B de Transportador de Cassetes de Ligação de ATP/genética , Animais , Compostos de Bifenilo/farmacologia , Captopril/farmacologia , Quimioterapia Combinada , Everolimo/farmacologia , Feminino , Regulação da Expressão Gênica , Hidroxiprolina/metabolismo , Irbesartana , Fígado/enzimologia , Fígado/patologia , Cirrose Hepática Experimental/enzimologia , Cirrose Hepática Experimental/genética , Cirrose Hepática Experimental/patologia , Masculino , Camundongos Knockout , Transdução de Sinais/efeitos dos fármacos , Sirolimo/farmacologia , Especificidade da Espécie , Serina-Treonina Quinases TOR/metabolismo , Tetrazóis/farmacologia , Fatores de Tempo , Membro 4 da Subfamília B de Transportadores de Cassetes de Ligação de ATP
13.
Eur J Clin Microbiol Infect Dis ; 34(4): 745-51, 2015 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-25431363

RESUMO

For easy handling and speed of lung diseases diagnostics, approaches based on volatile organic compounds (VOCs), including those emitted by pathogenic microorganisms, are considered but currently require considerable sampling efforts. We tested whether easy-to-handle and fast detection of lung infections is possible using solid-phase microextraction (SPME) of 100 ml of exhaled breath. An analytical procedure for the detection of VOCs from the headspace of epithelial lung cells infected with four human pathogens was developed. The feasibility of this method was tested in a cystic fibrosis (CF) outpatient clinic in vivo. Exhaled breath was extracted by SPME and analyzed by gas chromatography-mass spectrometry (GC-MS). The compositions of VOCs released in the infection model were characteristic for all individual pathogens tested. Exhaled breath of CF patients allowed clear distinction of CF patients and controls by their VOC compositions using multivariate analyses. Interestingly, the major specific VOCs detected in the exhaled breath of infected CF patients in vivo differed from those monitored during bacterial in vitro growth. SPME extraction of VOCs from 100 ml of human breath allowed the distinction between CF patients and healthy probands. Our results highlight the importance of assessing the entire pattern of VOCs instead of selected biomarkers for diagnostic purposes, as well as the need to use clinical samples to identify reliable biomarkers. This study provides the proof-of-concept for the approach using the composition of exhaled VOCs in human breath for the rapid identification of infectious agents in patients with lower respiratory tract infections.


Assuntos
Infecções Bacterianas/diagnóstico , Testes Respiratórios/métodos , Fibrose Cística/complicações , Adulto , Feminino , Cromatografia Gasosa-Espectrometria de Massas , Humanos , Masculino , Pessoa de Meia-Idade , Manejo de Espécimes/métodos , Fatores de Tempo , Compostos Orgânicos Voláteis/análise
14.
J Gastroenterol Hepatol ; 30(3): 638-45, 2015 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-25168203

RESUMO

BACKGROUND AND AIM: Development of effective antifibrotic treatments that can be translated to clinical practice is an important challenge in contemporary hepatology. A recent report on ß-thalassemia patients demonstrated that deferasirox treatment reversed or stabilized liver fibrosis independent of its iron-chelating properties. In this study, we investigated deferasirox in cell and animal models to better understand its potential antifibrotic effects. METHODS: The LX-2 stellate cell line was treated with 5 µM or 50 µM deferasirox (Exjade, Novartis Pharmaceuticals Australia, North Ryde, NSW, Australia) for up to 120 h. Three-week-old multidrug resistance 2 null (Mdr2(-/-) ) mice received oral deferasirox or vehicle for 4 weeks (30 mg/kg/day). Cells and liver tissue were collected for assessment of fibrosis and fibrogenic gene expression. RESULTS: In LX-2 cells treated with 50 µM deferasirox for 12 h, α1(I)procollagen expression was decreased by 25%, with maximal reductions (10-fold) seen following 24-120 h of treatment. Similarly, α-smooth muscle actin (αSMA) expression was significantly lower. Alterations in matrix remodeling genes, specifically decreased expression of matrix metalloproteinase-2 and tissue inhibitor of metalloproteinase-2, were observed. There was no significant difference in hepatic hydroxyproline content in Mdr2(-/-) mice following deferasirox administration (vehicle: 395 ± 27 µg/g vs deferasirox: 421 ± 33 µg/g). Similarly, no changes in the expression of fibrogenic genes were observed. CONCLUSION: Despite reductions in α1(I)procollagen and αSMA expression and alterations in matrix degradation genes in LX-2 cells, deferasirox did not exhibit antifibrotic activity in Mdr2(-/-) mice. Given the positive outcomes seen in human trials, it may be appropriate to study deferasirox in other animal models of fibrosis and/or for a longer duration of therapy.


Assuntos
Benzoatos/administração & dosagem , Benzoatos/farmacologia , Quelantes de Ferro/administração & dosagem , Quelantes de Ferro/farmacologia , Cirrose Hepática/tratamento farmacológico , Cirrose Hepática/genética , Triazóis/administração & dosagem , Triazóis/farmacologia , Actinas/genética , Actinas/metabolismo , Administração Oral , Animais , Células Cultivadas , Deferasirox , Modelos Animais de Doenças , Expressão Gênica/efeitos dos fármacos , Células Estreladas do Fígado , Humanos , Fígado/metabolismo , Fígado/patologia , Cirrose Hepática/metabolismo , Cirrose Hepática/patologia , Masculino , Metaloproteinase 2 da Matriz/genética , Metaloproteinase 2 da Matriz/metabolismo , Camundongos , Camundongos Transgênicos , Pró-Colágeno/metabolismo
15.
Environ Monit Assess ; 187(11): 661, 2015 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-26431705

RESUMO

Arsenic is a highly toxic element that pollutes groundwater, being a major environmental problem worldwide, especially in the Bengal Basin. About 40% of patients in our outpatient clinics come from those countries, and there is no published data about their arsenic exposure. This study compares arsenic exposure between immigrant and native children. A total of 114 children (57 natives, 57 immigrants), aged 2 months to 16 years, were recruited and sociodemographic and environmental exposure data were recorded. Total arsenic in urine, hair, and nails and arsenic-speciated compounds in urine were determined. We did not find significant differences in total and inorganic arsenic levels in urine and hair, but in organic arsenic monomethylarsenic acid (MMA) and dimethylarsinous acid (DMA) in urine and in total arsenic in nails. However, these values were not in the toxic range. There were significant differences between longer than 5 years exposure and less than 5 years exposure (consumption of water from tube wells), with respect to inorganic and organic MMA arsenic in urine and total arsenic in nails. There was partial correlation between the duration of exposure and inorganic arsenic levels in urine. Immigrant children have higher arsenic levels than native children, but they are not toxic. At present, there is no need for specific arsenic screening or follow-up in immigrant children recently arrived in Spain from exposure high-risk countries.


Assuntos
Arsênio/sangue , Emigrantes e Imigrantes , Exposição Ambiental/estatística & dados numéricos , Poluentes Químicos da Água/sangue , Arseniatos , Arsênio/análise , Ácido Cacodílico/análogos & derivados , Criança , Pré-Escolar , Monitoramento Ambiental , Feminino , Cabelo/química , Substâncias Perigosas , Humanos , Masculino , Unhas/química , Espanha , Água , Poluentes Químicos da Água/análise
16.
Rev Chil Pediatr ; 86(5): 345-50, 2015.
Artigo em Espanhol | MEDLINE | ID: mdl-26593887

RESUMO

OBJECTIVES: To study possible findings of factors in the antenatal, perinatal or postnatal period, in the mother or the child that may have an influence on the appearance of a developmental disorder. PATIENTS AND METHOD: A Data Base of Clinical Histories from every patient with a developmental disorder (F80-F90 ICD10) was created. The patients attended the Child Psychiatric Unit at Hospital Regional of Valdivia, Chile, from August 2006 to December 2008. Total: 493 patientes (48.7% of the total of patients consulting); CONTROL GROUP: 32 healthy patients. STATISTICAL METHOD: odds ratio (95% confidence). RESULTS: The main risk factors for developing a developmental disorder (P<.005, 25% frequency in the consulting population) are: prematurity, male sex, mother with low education, early hospitalizations, and medical illnesses (all with a significant odds ratio). Also, having a mother with psychiatric illness doubles the risk of having a developmental disorder. CONCLUSION: It requires an interdisciplinary collaborative work between neonatologists, obstetricians, child psychiatrists and the primary care to detect early children at risk.


Assuntos
Deficiências do Desenvolvimento/epidemiologia , Hospitalização/estatística & dados numéricos , Transtornos Mentais/epidemiologia , Mães , Adolescente , Adulto , Estudos de Casos e Controles , Criança , Chile/epidemiologia , Feminino , Humanos , Recém-Nascido , Comunicação Interdisciplinar , Masculino , Gravidez , Fatores de Risco , Fatores Sexuais , Adulto Jovem
17.
Opt Lett ; 39(2): 299-302, 2014 Jan 15.
Artigo em Inglês | MEDLINE | ID: mdl-24562131

RESUMO

We demonstrate an optical scheme for measuring the thickness of thin nanolayers with the use of light beam's spatial modes. The novelty in our scheme is the projection of the beam reflected by the sample onto a properly tailored spatial mode. In the experiment described below, we are able to measure a step height smaller than 10 nm, i.e., one-eightieth (1/80) of the wavelength with a standard error in the picometer scale. Since our scheme enhances the signal-to-noise ratio, which effectively increases the sensitivity of detection, the extension of this technique to the detection of subnanometric layer thicknesses is feasible.

18.
Genet Couns ; 25(2): 129-41, 2014.
Artigo em Inglês | MEDLINE | ID: mdl-25059011

RESUMO

BACKGROUND AND OBJECTIVE: Multidisciplinary management of Duchenne Muscular Dystrophy (DMD) has achieved outstanding results in developed nations. We aimed to describe the status of diagnosis and management of DMD in a developing country through the experience of non-profit organizations. METHODS: A Multistate, multiple-source, population-based survey was performed from medical records of 432 patients. Data were retrospectively collected, reviewed and curated by health specialists; including clinical features, age at first symptoms, age at diagnosis, disease progression and management, family history, education, age and cause of death. RESULTS: There is a delay in noticing first symptoms and it did not diminish over the past 20 years. Less than 30% of patients obtained definite diagnosis and most of them are in physiotherapy programs but not under steroid treatment. In our study, family history does not anticipate recognition of symptoms compared to sporadic cases (p = 0.05). Approximately 93.33% of our patients attended to education programs. Mean age at death was 18.94 +/- 6.73 years and the most frequent cause was pneumonia. CONCLUSION: Delayed diagnosis of DMD in Mexico is mainly caused by the late detection of first symptoms. There is no difference in early detection of symptoms between familiar and sporadic cases. Lifespan of patients in our cohort is reduced compared to developed countries. The late diagnosis and low percentage of definite cases may affect patient management and genetic counseling and could also preclude participation of patients into novel clinical trials.


Assuntos
Diagnóstico Tardio/estatística & dados numéricos , Gerenciamento Clínico , Aconselhamento Genético/estatística & dados numéricos , Distrofia Muscular de Duchenne/diagnóstico , Adolescente , Adulto , Criança , Pré-Escolar , Países em Desenvolvimento , Feminino , Humanos , Lactente , Masculino , México/epidemiologia , Distrofia Muscular de Duchenne/epidemiologia , Distrofia Muscular de Duchenne/genética , Distrofia Muscular de Duchenne/terapia , Estudos Retrospectivos , Adulto Jovem
19.
Lancet Planet Health ; 8 Suppl 1: S15, 2024 04.
Artigo em Inglês | MEDLINE | ID: mdl-38632910

RESUMO

BACKGROUND: Planetary health equity (PHE) is defined here as equitable good health in a stable Earth system. PHE is arguably in crisis. Human-made climate change is damaging global populations through hotter temperatures, wildfires, and more severe and frequent storms, flooding, and landslides. A tsunami of health inequities will result from this, as pre-existing health conditions and inequities in living and working conditions ensure that socially disadvantaged groups and people in low-income and middle-income countries are disproportionately affected by climate change. Despite evidence of these massive challenges and multiple calls to action, why has there been so little effective remedial action? And more importantly, how can we overcome this failure? To answer these questions, this panel discusses new research for understanding the conditions that enable coherent governance to improve planetary health equity outcomes. METHODS: The panel draws on emerging research from the Planetary Health Equity Hothouse. With perspectives from political economy, public health, policy studies, and systems science, we present new conceptual thinking and empirics around the complexities, dynamics, and trajectories of the global consumptogenic system in the 21st century, with a focus on the intersections between climate change and social and health inequities. The research examines mechanisms via which the global political economy creates planetary health inequities; identifies policy that optimises the climate, social, and health equity outcomes of mitigation actions; and discusses how governance for planetary health equity must evolve into the future, focusing on the structural, institutional, and ideational factors that advance action to promote PHE outcomes. FINDINGS: The global consumptogenic system of institutions, actors, norms, policies, and commercial activities that incentivise excessive production and consumption of fossil fuel-reliant goods and services with negative environmental, social, and health effects lies at the heart of the PHE crisis. Using network analysis, we show that the global PHE governance architecture is highly centralised and dominated by economic governance organisations. We also discuss a new Planetary Health Equity Impact Assessment tool to assess the PHE effects of existing policy and business practices within the consumptogenic system. An initial assessment of the mitigation sections of national governments' Nationally Determined Contribution reports to the UN Framework Convention on Climate Change shows a dominance of economic language and issues. This highlights a missed opportunity for mitigation policy to be inclusive of social and health matters. Finally, we present new conceptual understandings of multilevel governance coherence and relevant strategies to advance PHE focused action. INTERPRETATION: The major contribution from research on governance for planetary health equity lies in detailing the what, who, and how of effective governance that advances health, social equity, and the environment in an interconnected way, helping to shift institutional norms and behaviours towards principles of fairness, sustainability, and human wellbeing. Crucially, it provides strategies for socially oriented actors, including governments, civil society, and international organisations to change the consumptogenic system and advance action for PHE. FUNDING: Australian Research Council.


Assuntos
Equidade em Saúde , Humanos , Austrália , Saúde Pública , Políticas
20.
Actas Urol Esp (Engl Ed) ; 48(7): 512-520, 2024 Sep.
Artigo em Inglês, Espanhol | MEDLINE | ID: mdl-38159804

RESUMO

INTRODUCTION: The improved image resolution of IMAGE1 S technology will increase tumor detection, achieve a greater number of complete resections, and would probably have an impact on the reduction of recurrences. AIM: The primary objective was to compare the recurrence rates of IMAGE1 S vs. white light during transurethral resection of the bladder (TUR); the secondary objective was to compare the complication rates according to Clavien-Dindo (CD) at 12 months of follow-up. METHODS: Prospective, randomized 1:1, blinded clinical trial. Recurrence and complication rates according to CD were analyzed using chi-square/U Mann-Whitney tests and recurrence-free survival (RFS) using Kaplan-Meier curves. The European Association of Urology (EAU) 2021 scoring model was used. RESULTS: The analysis included 103 participants; 49 were assigned to the IMAGE1 S group and 54 to the white light group. Recurrence rates were 12.2% and 25.9%, respectively (P = .080). The low and intermediate risk group had a lower recurrence rate with IMAGE1 S (7.7% vs. 30.8%, P = .003) and a higher RFS with IMAGE1 S (85.2% vs. 62.8% Log Rank: 0.021), with a Hazard Ratio of 0.215 (95% CI: 0.046-0.925). No differences were observed in the high and very high-risk groups. Complications were mostly grade I and rates were similar between both groups (IMAGE1 S 20.4% vs. white light 7.4% P = .083). CONCLUSIONS: There were no differences in the recurrence rates between groups. However, the low and intermediate risk group had a lower recurrence rate with IMAGE1 S. In addition, perioperative complication rates were not higher.


Assuntos
Recidiva Local de Neoplasia , Neoplasias da Bexiga Urinária , Humanos , Neoplasias da Bexiga Urinária/cirurgia , Neoplasias da Bexiga Urinária/patologia , Recidiva Local de Neoplasia/prevenção & controle , Recidiva Local de Neoplasia/epidemiologia , Masculino , Feminino , Estudos Prospectivos , Idoso , Seguimentos , Pessoa de Meia-Idade , Fatores de Tempo , Método Simples-Cego , Cistectomia/métodos , Luz , Uretra
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