Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 115
Filtrar
1.
Arch Virol ; 169(3): 64, 2024 Mar 07.
Artigo em Inglês | MEDLINE | ID: mdl-38451333

RESUMO

Tomato necrotic ringspot virus (TNRV) was first reported in Thailand in 2011, where it continues to reduce the yield and quality of pepper and tomato crops. Here, we report the complete genome sequence of TNRV isolate chilli-CR derived from next-generation sequencing. The TNRV genome comprises 16,595 nucleotides (nt) on three RNA segments. The L RNA is 8,858 nt, the M RNA is 4,724 nt, and the S RNA is 3,013 nt in length. The genome structure and organization are typical of orthotospoviruses, encoding five proteins, named L, NSm, GNGC, NSs, and N. Pairwise comparison of each genomic RNA segment and its deduced amino acid (aa) sequence showed that TNRV chilli-CR shares 73.6-82.3% nt sequence identity and 81.1-91.9% aa sequence identity with pepper chlorotic spot virus (PCSV). Similar phylogenetic groupings were observed based on each genomic RNA or deduced aa sequence, and with concatenated genomic RNA sequences. The clustering of TNRV and PCSV in all phylogenetic analyses, and the 78.9% overall nt sequence identity observed using the concatenated genomic RNAs suggest that TNRV is a distinct orthotospovirus and that analysis of concatenated orthotospovirus genome sequences will be of value in future phylogenetic studies of this virus group.


Assuntos
Nepovirus , Solanum lycopersicum , Tailândia , Filogenia , Sequenciamento de Nucleotídeos em Larga Escala , Necrose , Nucleotídeos , RNA
2.
Eur J Ophthalmol ; : 11206721241230567, 2024 Feb 04.
Artigo em Inglês | MEDLINE | ID: mdl-38311887

RESUMO

INTRODUCTION: There are no reports in the literature studying the possible relationship between Epstein-Barr virus (EBV) and optic nerve involvement in multiple sclerosis (MS). The aim of our study was to analyze the association between EBV antibodies titres and optical coherence tomography (OCT) and OCT angiography (OCTA) quantitative parameters. METHODS: We conducted a retrospective study. The study included 98 eyes of 49 patients with MS. Years of MS duration, relapse count, history of optic neuritis (ON), and immunoglobulin (Ig) G antibodies to the EBV viral capsid antigen (VCA) were recorded from each patient. Also, OCT analysis (including retinal nerve fibre layer (RNFL) thickness and ganglion cell-inner plexiform layer (GCIPL) thickness) and OCTA analysis (including perfusion density (PD) and flux index (FI) of the radial peripapillary capillary plexus) were performed in each participant. RESULTS: No significant associations were observed between anti-EBV antibody levels and OCT or OCTA parameters (p > 0,05). Correlation analysis between OCT and OCTA measurements showed a significant positive correlation between RNFL thickness and GCIPL thickness with peripapillary PD and FI (p < 0,035). Subgroup analysis revealed a significant diminution of RNFL thickness, GCIPL thickness and peripapillary PD and FI (p < 0,05) in the ON group. CONCLUSION: We were unable to demonstrate a significant association between anti-EBV VCA IgG antibody titres and OCT or OCTA parameters. Nonetheless, further longitudinal studies are needed to explore the possible association of EBV with optic nerve involvement in MS.

3.
Eur J Ophthalmol ; : 11206721241228349, 2024 Jan 23.
Artigo em Inglês | MEDLINE | ID: mdl-38258450

RESUMO

INTRODUCTION: Evidence on peripapillary microvasculature in intracranial hypertension (IH) after the regression of papilledema is still scarce. The aim of this preliminary study was to determine the association between structural changes in the optic nerve and the retina and peripapillary microvasculature in patients with IIH. METHODS: We conducted a retrospective study. The study included 39 eyes of 21 patients with IIH. Treatment for IIH and history of obesity were registered from each patient. Moreover, OCT analysis including retinal nerve fiber layer (RNFL) thickness and ganglion cell-inner plexiform layer (GCIPL) thickness, and OCTA analysis including perfusion density (PD) and flux index (FI) of the radial peripapillary capillary plexus were performed. RESULTS: Correlation analysis revealed a high correlation between GCIPL thickness and peripapillary PD and FI (p < 0,05, r > 0,7), whereas the degree of correlation between RNFL thickness and peripapillary microvascular parameters was low (p < 0,05, r < 0,7). Patients with regressed papilledema had significantly lower GCIPL thickness and peripapillary PD than control subjects (p < 0,05). CONCLUSION: Peripapillary microvascular measurements are highly correlated with GCIPL thickness in patients with IIH. Moreover, GCIPL thickness and peripapillary PD are significantly inferior in patients with regressed papilledema compared to control group. Thus, we suggested that peripapillary microvascular parameters may be an early indicator of optic nerve atrophy in patients with IIH.

4.
Rep Prog Phys ; 87(1)2023 Nov 28.
Artigo em Inglês | MEDLINE | ID: mdl-37879327

RESUMO

This is an update of a previous review (Naumiset al2017Rep. Prog. Phys.80096501). Experimental and theoretical advances for straining graphene and other metallic, insulating, ferroelectric, ferroelastic, ferromagnetic and multiferroic 2D materials were considered. We surveyed (i) methods to induce valley and sublattice polarisation (P) in graphene, (ii) time-dependent strain and its impact on graphene's electronic properties, (iii) the role of local and global strain on superconductivity and other highly correlated and/or topological phases of graphene, (iv) inducing polarisationPon hexagonal boron nitride monolayers via strain, (v) modifying the optoelectronic properties of transition metal dichalcogenide monolayers through strain, (vi) ferroic 2D materials with intrinsic elastic (σ), electric (P) and magnetic (M) polarisation under strain, as well as incipient 2D multiferroics and (vii) moiré bilayers exhibiting flat electronic bands and exotic quantum phase diagrams, and other bilayer or few-layer systems exhibiting ferroic orders tunable by rotations and shear strain. The update features the experimental realisations of a tunable two-dimensional Quantum Spin Hall effect in germanene, of elemental 2D ferroelectric bismuth, and 2D multiferroic NiI2. The document was structured for a discussion of effects taking place in monolayers first, followed by discussions concerning bilayers and few-layers, and it represents an up-to-date overview of exciting and newest developments on the fast-paced field of 2D materials.

5.
Pharmaceut Med ; 37(6): 425-437, 2023 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-37804414

RESUMO

Pharmacovigilance (PV) activities aim to identify potential risks of medicines and vaccines after they have been authorised in the market by collecting and analysing information on suspected adverse events from different stakeholders. These can be captured and transmitted electronically in the form of Individual Case Safety Reports (ICSRs). Hence, up-to-date ICSRs management systems, like VigiFlow and signal detection and management systems as VigiLyze, have an important role in the PV system of a country. In 2019, after various attempts to establish a PV database that could fulfil the needs of the country, Mexico's National Regulatory Authority, COFEPRIS (Federal Commission for the Prevention against Sanitary Risks) decided to implement these tools. This has been a successful project that is still ongoing, it has involved national and international organisations, and has required the participation and integration of different components of the national PV system. The implementation of these tools has allowed COFEPRIS to increase its reporting trends and quality of reporting, while contributing to make more efficient interactions and processes with PV stakeholders, even during the COVID-19 pandemic. It has also allowed them to strengthen their commitment to the WHO-Programme for International Drug Monitoring, while highlighting opportunities for improvement in the national PV scenario and in the PV tools themselves. The aim of this article is to describe the implementation process, give an overview of current results regarding ICSR data and processes, and highlight the achievements, challenges, and opportunities for improvement after the three years since the beginning of the project.


Assuntos
COVID-19 , Farmacovigilância , Humanos , Sistemas de Notificação de Reações Adversas a Medicamentos , México , Pandemias , COVID-19/epidemiologia , COVID-19/prevenção & controle
6.
Rev Med Inst Mex Seguro Soc ; 61(4): 502-508, 2023 07 31.
Artigo em Espanhol | MEDLINE | ID: mdl-37540722

RESUMO

Single nucleotide polymorphisms (SNPs) have been reported to play an important role in the etiology of dental caries. The aim of this research was, through a systematic review, to identify SNPs recently associated with dental caries in pediatric populations. We included studies performed in humans up to 18 years of age that evaluated the relationship between SNPs and dental caries from 2017 to 2022. Articles that covered other study variables were excluded. PubMed, ScienceDirect and Web of Science were used to search for information and the included articles were evaluated with one of the Joanna Briggs Institute's tools. Twenty-five articles were selected, 60% of which were given high methodological quality. A total of 10,743 research subjects, ranging in age from 20 months to 17 years, participated in the study. The SNPs considered risk factors were identified in the genes miRNA202, VDR, AMELX, TUFT1, KLK4, MBL2, ENAM, DEFB1, HLA-DRB1, TAS1R1, DSPP, RUNX2 and MMP13; those considered protective factors were identified in the genes MMP20, AMBN, MMP9, TIMP2, TNF-α, VDR, IL1B, ENAM and HLA-DRB1. This systematic review presents the genetic polymorphisms that are associated with the etiology of caries in children and adolescents, some of which act as risk factors and others as protective factors against the disease.


Se ha reportado que los polimorfismos de nucleótido único (SNPs) juegan un papel importante en la etiología de la caries dental. El objetivo de esta investigación fue, a través de una revisión sistemática, identificar los SNPs asociados recientemente a la caries dental en poblaciones pediátricas. Se incluyeron estudios realizados en humanos de hasta 18 años de edad que evaluaron la relación entre los SNPs y la caries dental, publicados desde el 2017 hasta el 2022. Se excluyeron los artículos que abarcaron otras variables de estudio. PubMed, ScienceDirect y Web of Science se utilizaron para la búsqueda de información y los artículos incluidos fueron evaluados con una de las herramientas del Instituto Joanna Briggs. Fueron seleccionados 25 artículos, al 60% de ellos se le otorgó calidad metodológica alta. En total participaron 10,743 sujetos de invetigación, cuyas edades variaron de 20 meses a 17 años. Los SNPs considerados factores de riesgo fueron identificados en los genes miRNA202, VDR, AMELX, TUFT1, KLK4, MBL2, ENAM, DEFB1, HLA-DRB1, TAS1R1, DSPP, RUNX2 y MMP13, los considerados factores de protección se identificaron en los genes MMP20, AMBN, MMP9, TIMP2, TNF-α, VDR, IL1B, ENAM y HLA-DRB1. Esta revisión sistemática expone los polimorfismos genéticos que se encuentran asociados a la etiología de la caries en niños y adolescentes, algunos de los cuales actúan como factores de riesgo y otros como factores de protección ante la enfermedad.


Assuntos
Cárie Dentária , Lectina de Ligação a Manose , MicroRNAs , beta-Defensinas , Adolescente , Humanos , Criança , Cárie Dentária/genética , Cadeias HLA-DRB1/genética , Polimorfismo de Nucleotídeo Único , Lectina de Ligação a Manose/genética , beta-Defensinas/genética
7.
Rev. ADM ; 80(4): 220-227, jul.-ago. 2023. ilus, tab
Artigo em Espanhol | LILACS | ID: biblio-1527184

RESUMO

Introducción: el hueso está en remodelación constante para mantener la estructura del esqueleto, tener un ciclo de resorción por los osteoclastos y formación de hueso nuevo a cargo de los osteoblastos; el hueso también es susceptible a enfermedades sistémicas, traumas, edad y trastornos genéticos que afectarán el remodelado óseo, produciendo una pérdida masiva de masa ósea regulado por hormonas, citocinas, enzimas, etcétera. El objetivo es realizar una revisión sistemática de artículos que muestren cambio o alteración al utilizar tratamientos con microvibraciones y farmacológicos sobre la catepsina K en el hueso alveolar. Material y métodos: para realizar una comparación entre la efectividad del tratamiento a base de microvibraciones y con inhibidores de la catepsina K, se realizó una revisión sistemática en nueve bases de datos (Wiley Online Library, PubMed, Google Academic, Scopus, ScienceDirect, SciELO, Medline, EBSCO y Springer Link). La población de estudio fueron ratas y ratones. Resultados: en este estudio se incluyeron 20 artículos cuya investigación se realizó en estudios clínicos. En los resultados podemos observar cómo todos los tratamientos de alguna forma mejoran el proceso de remodelado óseo. Es difícil comparar cuál de los tratamientos dentro de cada grupo es mejor que otro, debido a que los resultados expresados son cualitativos. Conclusión: acorde a los resultados expresados se opta por realizar un tratamiento con microvibraciones debido a que el uso de inhibidores de la catepsina K aún no se encuentra completamente desarrollado y no se comprenden sus consecuencias debido a su manera sistémica de actuar (AU)


Introduction: the bone is in constant remodeling to maintain the skeletal structure, having a cycle of resorption by osteoclasts and formation of new bone by osteoblasts, the bone is also susceptible to systemic diseases, trauma, age and genetic disorders that affect bone remodeling, producing a massive loss of bone mass regulated by hormones, cytokines, enzymes, etcetera. The objective is to perform a systematic review of articles that show a change or alteration when using micro-vibration and pharmacological treatments on cathepsin K in the alveolar bone. Material and methods: in order to make a comparison between the effectiveness of micro-vibration and cathepsin K inhibitor treatments, a systemic review was carried out in nine databases (Wiley Online Library, PubMed, Google Academic, Scopus, ScienceDirect, SciELO, Medline, EBSCO and Springer Link). The study population was rats and mice. Results: this study included 20 articles whose research was carried out in clinical studies. In the results we can see how all the treatments in some way improve the bone remodeling process, it is difficult to compare which treatment within each group is better than the other, because the results expressed are qualitative. Conclusion: according to the results expressed, it is decided that it is better to perform a treatment with micro vibrations because the use of cathepsin K inhibitors are not yet fully developed and their consequences are not understood due to their systemic way of acting (AU)


Assuntos
Humanos , Animais , Camundongos , Regeneração Óssea/fisiologia , Catepsina K/fisiologia , Osteoclastos/fisiologia , Técnicas de Movimentação Dentária , Bases de Dados Bibliográficas , Remodelação Óssea/fisiologia
8.
HardwareX ; 15: e00446, 2023 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-37457306

RESUMO

Stereotaxic surgery is a less invasive form of surgery that uses a three-dimensional coordinate system to place instruments at a specific location in the brain. Through this type of surgery, one can place needles among other tools within the structures of the brain. Therefore, injections can be given in order to deliver substances that cannot cross the blood-brain barrier. The two most important parameters of the microinjection to control are volume and speed. The volume should not be so large that it displaces the brain tissue and tears it. The injection speed must also be slow so that the liquid that comes out of the syringe can diffuse into the tissue without displacing it and damaging it. Thus, the objectives of the present work are: 1) To develop not a 3D printed prototype but an end-user device. 2) The device must be for animal research only. 3) It must have the same precision in volume and speed as commercial devices. 4) It must be adjustable for microsyringes from 0.5 µl to 1 ml. 5) It must be possible to place it directly on the stereotaxic surgery apparatus and to use it separately. 6) The price must be substantially lower than that of the commercial devices.

9.
J Vet Diagn Invest ; 35(5): 470-483, 2023 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-37313802

RESUMO

Anticoagulant rodenticides (ARs) are used to control rodent populations. Poisoning of non-target species can occur by accidental consumption of commercial formulations used for rodent control. A robust method for determining ARs in animal tissues is important for animal postmortem diagnostic and forensic purposes. We evaluated an ultra-performance liquid chromatography coupled with mass spectrometry (UPLC-MS) method to quantify 8 ARs (brodifacoum, bromadiolone, chlorophacinone, coumachlor, dicoumarol, difethialone, diphacinone, warfarin) in a wide range of animal (bovine, canine, chicken, equine, porcine) liver samples, including incurred samples. We further evaluated UPLC-MS in 2 interlaboratory comparison (ILC) studies; one an ILC exercise (ICE), the other a proficiency test (PT). The limits of detection of UPLC-MS were 0.3-3.1 ng/g, and the limits of quantification were 0.8-9.4 ng/g. The recoveries obtained using UPLC-MS were 90-115%, and relative SDs were 1.2-13% for each of the 8 ARs for the 50, 500, and 2,000 ng/g spiked liver samples. The overall accuracy from the laboratories participating in the 2 ILC studies (4 and 11 laboratories for ICE and PT studies, respectively) were 86-118%, with relative repeatability SDs of 3.7-11%, relative reproducibility SDs of 7.8-31.2%, and Horwitz ratio values of 0.5-1.5. Via the ILC studies, we verified the accuracy of UPLC-MS for AR analysis in liver matrices and demonstrated that ILC can be utilized to evaluate performance characteristics of analytical methods.


Assuntos
Anticoagulantes , Técnicas de Química Analítica , Cumarínicos , Indanos , Rodenticidas , Animais , Técnicas de Química Analítica/métodos , Técnicas de Química Analítica/normas , Técnicas de Química Analítica/veterinária , Rodenticidas/análise , Anticoagulantes/análise , Fígado/química , Espectrometria de Massa com Cromatografia Líquida , Indanos/análise , Cumarínicos/análise , Limite de Detecção , Reprodutibilidade dos Testes
10.
Rev. ADM ; 80(2): 104-114, mar.-abr. 2023. ilus, tab
Artigo em Espanhol | LILACS | ID: biblio-1516523

RESUMO

Introducción: la pérdida de hueso es un suceso que afecta a la totalidad del esqueleto. Así, las alteraciones musculoesqueléticas afectan a millones de personas en todo el mundo y están entre las causas más comunes de dolor crónico. Objetivo: conocer los efectos de la microvibración y estrógeno en el remodelado óseo. Material y métodos: se realizó una revisión sistemática, se buscó en siete bases de datos, se incluyeron estudios clínicos controlados realizados con ratas o ratones en el periodo de publicación del 2004 al 2022. La calidad de la evidencia sintetizada se evaluó con la escala de Jadad. Resultados: se identificaron quince artículos como estudios primarios. La microvibración reportó cambios in vivo/in vitro totalmente dependientes del estímulo que conlleva incremento de la cortical externa. A su vez, con la administración de estrógeno se reportaron efectos, específicamente, en el hueso trabecular y en el periostio, así como colágeno inmaduro que indican un recambio óseo. Conclusión: tanto la microvibración como la administración de estrógeno coadyuvan a la remodelación del tejido óseo y son aprovechables como tratamiento en el momento que exista un problema de pérdida ósea (AU)


Introduction: Bone loss is an event that affects the entire skeleton. Thus, musculoskeletal disorders affect millions of people worldwide and are among the most common causes of chronic pain. Objective: to know the effects of micro-vibration and estrogen on bone remodelling. Material and methods: a systematic review was carried out; seven databases were searched; Controlled clinical studies conducted with rats or mice in the publication period from 2004 to 2022 were included. The quality of the synthesized evidence was assessed using the Jadad scale. Results: fifteen articles were identified as primary studies. Micro vibration reported in vivo/in vitro changes dependent on the stimulus that entails an increase in the outer cortex. In turn, with the administration of estrogen, effects were reported, specifically in the trabecular bone and in the periosteum, as well as immature collagen that indicates bone turnover. Conclusion: both micro-vibration and the administration of estrogen contribute to the remodelling of bone tissue and are usable as a treatment for bone loss (AU)


Assuntos
Humanos , Animais , Camundongos
11.
Int J Dent ; 2023: 2960941, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-36866025

RESUMO

Introduction: Bisphosphonates are widely used in the treatment of osteoporosis; however, they are associated with the serious adverse event of bisphosphonate-related osteonecrosis of the jaw (BRONJ). Aim: The aim of this study is to assess the effects of nitrogen-containing bisphosphonates (N-PHs) on the synthesis of IL-1ß, TNF-α, sRANKL, cathepsin K, and annexin V in bone cells cultured in vitro. Materials and Methods: Osteoblasts and bone marrow-derived osteoclasts were cultured in vitro, subjected to treatment with alendronate, risedronate, or ibandronate at a concentration of 10-5 M for 0 to 96 h and then assayed for IL-1ß, sRANKL, and TNF-α production by ELISA. Cathepsin K and Annexin V-FITC staining in osteoclasts were assessed by flow cytometry. Results: There was significant downregulation of IL-1ß, sRANKL, and TNF-α in experimental osteoblasts compared to control cells, and there was upregulation of IL-1ß and downregulation of RANKL and TNF-α in experimental osteoclasts. Furthermore, in osteoclasts, cathepsin K expression was downregulated at 48-72 h with alendronate treatment, while risedronate treatment resulted in upregulated annexin V expression at 48 h compared to the control treatment. Conclusion: Bisphosphonates added to bone cells inhibited osteoclastogenesis, which led to the downregulation of cathepsin K and induction of apoptosis in osteoclasts; these changes limited the capacity of bone remodelling and healing that may contribute to BRONJ induced by surgical dental procedures.

12.
Artigo em Inglês | MEDLINE | ID: mdl-36674040

RESUMO

The capability to share knowledge is considered one of the most relevant components of knowledge management. Moreover, there is little empirical evidence indicating how future human resources in the construction industry value the richness of knowledge sharing and the richness of their innovative behavior. The purposes of this study are (1) to determine which facilitators, from the point of view of master's degree students related to engineering and construction management in Spain, most substantially influence knowledge sharing capability; (2) to test whether knowledge sharing capability (KS) positively influences innovative behavior (IB); and (3) demonstrating whether organizational innovation climate (OIC) is a factor that moderates the relationship between KS and IB. In this research, we have proposed a theoretical model and empirically tested the model in a sample of 253 master's degree students in public universities in Spain. The findings support the proposed model, and the structural equation modeling (SEM) evaluation suggests that, among all the facilitators of KS, information and communication technologies (ICT) stand out among the other facilitators and have a more significant influence on KS. Furthermore, the research found a direct correlation between KS and IB and causal links between OIC and IB.


Assuntos
Criatividade , Estudantes , Humanos , Análise de Classes Latentes , Espanha
13.
J Phys Condens Matter ; 35(3)2022 Nov 25.
Artigo em Inglês | MEDLINE | ID: mdl-36347047

RESUMO

A two-dimensional topological crystalline insulator (TCI) with a single unit cell (u.c.) thickness is demonstrated here. To that end, one first shows that tetragonal (C4in-plane) symmetry is not a necessary condition for the creation of zero-energy metallic surface states on TCI slabs of finite-thicknesses, because zero-energy states persist even as all the in-plane rotational symmetries-furnishing topological protection-are completely removed. In other words, zero-energy levels on the model are not due to (nor are they protected by) topology. Furthermore, effective two-fold energy degeneracies taking place at few discretek-points away from zero energy in the bulk Hamiltonian-that are topologically protected-persist at the u.c. thickness limit. The chiral nature of the bulk TCI Hamiltonian permits creating a2×2square Hamiltonian, whose topological properties remarkably hold invariant at both the bulk and at the single u.c. thickness limits. The identical topological characterization for bulk and u.c.-thick phases is further guaranteed by a calculation involving Pfaffians. This way, a two-atom-thick TCI is deployed hereby, in a demonstration of a topological phase that holds both in the bulk, and in two dimensions.

14.
Nano Lett ; 22(19): 7984-7991, 2022 Oct 12.
Artigo em Inglês | MEDLINE | ID: mdl-36190418

RESUMO

Traditional ferroelectrics undergo thermally induced phase transitions whereby their structural symmetry increases. The associated higher-symmetry structure is dubbed paraelectric. Ferroelectric transition-metal dichalcogenide bilayers have been recently shown to become paraelectric, but not much has been said of the atomistic configuration of such a phase. As discovered through numerical calculations that include molecular dynamics here, their paraelectricity can only be ascribed to a time average of ferroelectric phases with opposing intrinsic polarizations, whose switching requires macroscopically large areas to slip in unison.


Assuntos
Elementos de Transição , Transição de Fase
15.
Optom Vis Sci ; 99(10): 781-785, 2022 10 01.
Artigo em Inglês | MEDLINE | ID: mdl-36067394

RESUMO

SIGNIFICANCE: Optic neuropathy associated with Sjögren syndrome is rare and usually has an acute onset. PURPOSE: This study aimed to report a case of asymmetric optic nerve atrophy attributed to Sjögren syndrome. CASE REPORT: A 37-year-old woman was referred to neuro-ophthalmology service because of right optic nerve atrophy of unknown etiology. The patient was asymptomatic. Best-corrected visual acuity was 20/200 Snellen equivalent in the right eye and 20/20 Snellen equivalent in the left eye. The right eye had a relative afferent pupillary defect. Visual field demonstrated dense temporal loss, superior arcuate involvement, and an inferior paracentral defect in the right eye. Slit-lamp examination showed mild fluorescein staining of the cornea, moderate lissamine green staining of the conjunctiva, and abnormal tear breakup time in both eyes. Fundus examination revealed diffuse pallor of the right optic disc and a normal left optic disc. Optical coherence tomography showed inferior and superior retinal nerve fiber layer atrophy in the right eye and inferior retinal nerve fiber layer atrophy in the left eye. A diagnosis of right optic nerve atrophy was made. Immunologic studies were significant for positive anti-Ro and anti-La antibodies. MRI of the brain and orbit ruled out any intracranial or white-matter pathology. A diagnosis of optic nerve atrophy secondary to Sjögren syndrome was suspected, so corticosteroid treatment was started. CONCLUSIONS: Optic nerve atrophy may be the initial manifestation of Sjögren syndrome. Therefore, optic neuropathy associated with Sjögren syndrome remains a diagnostic challenge. In these cases, specific antibodies such as anti-Ro and anti-La facilitate early diagnosis and can prevent vision-threatening complications.


Assuntos
Atrofia Óptica , Doenças do Nervo Óptico , Síndrome de Sjogren , Adulto , Atrofia , Feminino , Fluoresceínas , Humanos , Atrofia Óptica/diagnóstico , Atrofia Óptica/etiologia , Nervo Óptico/diagnóstico por imagem , Doenças do Nervo Óptico/diagnóstico , Síndrome de Sjogren/complicações , Síndrome de Sjogren/diagnóstico , Tomografia de Coerência Óptica/métodos
16.
Rev. ADM ; 79(3): 165-176, mayo-jun. 2022. ilus, tab
Artigo em Espanhol | LILACS | ID: biblio-1378976

RESUMO

Introducción: El hueso, reservorio de minerales y moléculas orgánicas, es un tejido dinámico que detecta y se adapta a las cargas mecánicas de los órganos y tejidos del cuerpo, el cual mantiene la estructura ósea del esqueleto durante el crecimiento y a través de la vida del ser humano. Las células óseas son sensibles a las cargas mecánicas y microvibra- ciones que recibe el esqueleto. Objetivo: El propósito de este estudio fue realizar una revisión sistemática acerca de los efectos que ejerce la microvibración de alta frecuencia-baja intensidad, en osteocitos cultivados in vitro sobre la síntesis de factores solubles, con el propósito de entender si la microvibración tiene influencia en la aceleración del movimiento dentario. Material y métodos: Se realizó una búsqueda de artículos de revisión de osteocitos y otras células óseas in vitro, a través de la estrategia PICO (Paciente, Intervención, Comparación, Resultado [Outcome]), con el empleo de palabras clave como: «os- teocitos¼, «microvibración¼, «remodelación¼, «osteoclastogénesis¼, «citocinas¼ y «osteoblastos¼. Se estructuró por medio de PRISMA (informe de revisiones sistemáticas y meta-análisis). La captación de datos finales se hizo por medio del método de puntuación de calidad Jadad y Cochrane (modelo de correlación) como herramientas para evaluar el riesgo de sesgo de cada uno de los artículos. Se incluyeron 11 artículos con alta calidad metodológica. Resultados: La mayoría de los experimentos in vitro demostraron que la microvibración tuvo un aumento estadísticamente significativo en la proliferación y dife- renciación de las células madre mesenquimales (MSC), en osteoblastos (MC3T3-E1), en la expresión de proteínas para inducir osteogénesis y en los osteocitos (MLO-Y4). Asimismo, sobrerregularon la expresión de osteoprotegerina (OPG), prostaglandina (PGE2) y óxido nitroso (NO) al alterar y regular los factores solubles como las citocinas, factores de crecimiento y quimiocinas, de las demás células, además de mostrar una disminución en la actividad de los osteoclastos (RAW246.7) en la resorción ósea. Conclusión: La microvibración induce remodelación ósea. Los osteocitos son sensibles a los estímulos mecánicos y producen factores solubles para inducir la remodelación ósea, razón por la cual se emplea la microvibración como una terapia innovadora y prometedora, no invasiva y no farmacológica en la estimulación de la formación ósea de la superficie del hueso (AU)


Assuntos
Humanos , Osteogênese , Vibração , Remodelação Óssea , Osteócitos , Reabsorção Óssea , Análise de Variância , Citocinas , Meios de Cultura , Ligante RANK
17.
Food Sci Anim Resour ; 42(3): 536-555, 2022 May.
Artigo em Inglês | MEDLINE | ID: mdl-35611083

RESUMO

The most abundant Orthoptera in Mexico is a small grasshopper (Sphenarium purpurascens) which is considered a food source with increased nutritional value due to its high protein content. Insect proteins have gained relevance because of their high potential as gelling, texturing, and extender agents in the food industry. The objective of this study was to evaluate the effect of substituting meat with a soluble protein extract from grasshopper obtained by alkalisation or alkalisation-piezoelectric ultrasound, on the techno-functional, physicochemical, and sensory characteristics of cooked meat models (sausages). The soluble protein was extracted in NaHCO3 pH 8 and a piezoelectric ultrasound 5-mm sonotrode at 20 kHz with 99% amplitude. Different formulations with meat substitution: 0%, 5%, 10%, and 15% were prepared and characterised for their rheological behaviour, emulsion stability, weight loss by cooking, total protein content, colour, and texture. Sensory evaluation was conducted with consumers using a test involving check-all-that-apply and overall liking. The alkalisation-piezoelectric ultrasound method improved the solubility and the techno-functional properties of the soluble grasshopper protein when applied in sausages at maximum levels of 10% meat substitution. The sensory evaluation indicated that the formulation with 5% meat substitution exhibited the same acceptability as the control sample. Given these results, the soluble protein treated with alkalisation and piezoelectric ultrasound could be used as an extender in meat products.

18.
Foods ; 11(5)2022 Feb 27.
Artigo em Inglês | MEDLINE | ID: mdl-35267337

RESUMO

Insects are currently of interest due to their high nutritional value, in particular for the high concentration of quality protein. Moreover, it can also be used as an extender or binder in meat products. The objective was to evaluate grasshopper flour (GF) as a partial or total replacement for potato starch to increase the protein content of sausages and achieve good acceptability by consumers. GF has 48% moisture, 6.7% fat and 45% total protein. Sausages were analyzed by NIR and formulations with GF in all concentrations (10, 7, 5 and 3%) combined with starch (3, 5 and 7%) increased protein content. Results obtained for the sausages formulations with grasshoppers showed an increase in hardness, springiness, gumminess and chewiness through a Texture-Profile-Analysis. Moreover, a* and b* are similar to the control, but L* decreased. The check-all-that-apply test showed the attributes highlighted for sausages with GF possessed herbal flavor, brown color, and granular texture. The liking-product-landscape map showed that the incorporation of 7 and 10% of GF had an overall liking of 3.2 and 3.3, respectively, considered as "do not like much". GF can be used as a binder in meat products up to 10% substitution. However, it is important to improve the overall liking of the sausage.

19.
J Telemed Telecare ; : 1357633X211059707, 2021 Dec 01.
Artigo em Inglês | MEDLINE | ID: mdl-34851202

RESUMO

BRIEF SUMMARY: The addition of home monitoring to an integrated care model in patients with advanced chronic heart/lung diseases decreases mortality, hospital and emergency admissions, improves functional status, HRQoL, and is cost-effective. BACKGROUND: Telemonitoring is a promising implement for medicine, but its efficacy is unknown in patients with advanced heart and lung failure (AHLF). OBJECTIVE: To determine the efficacy of a telemonitoring system added to coordinated clinical care in patients with AHLF. DESIGN: Randomized phase 3 multicenter clinical trial with parallel groups in adult patients. PARTICIPANTS: Five spanish centers including patients with AHLF at discharge or in out-patient clinics. INTERVENTION: Patients were randomly assigned to receive a remote bio-parameters telemonitoring system (TELECARE) or best usual care (UCARE). TELECARE patients were provided with devices that collected symptoms and bio-parameters, and transferred them synchronously to a call-center, with a real-time health-care response. MAIN MEASURES: Primary end point was the need of admissions/emergency room visits at 45, 90, 180 days. Secondary end points included health care requirements, mortality, functional assessment, health related quality of life (HRQoL), perceived satisfaction, and cost-efficacy. RESULTS: 510 patients were included (54.5% women, median age 76.5 years; 63.1% suffered heart failure, 13.9% lung failure, and 22.9% both conditions). Clinical and functional features were comparable in both arms. TELECARE globally needed less admissions with respect UCARE after 45 days of inclusion (35.4% vs. 46.9%, p < 0.05). This tendency was maintained in the subgroups of patients with multimorbidity (34.2% vs. 46.9%, p < 0.05), intermediate risk of mortality (36.5% vs. 51.1%, p < 0.05), and those included after hospital discharge (34.9% vs. 50.5%, p < 0.01). HRQoL significantly improved (TELECARE/UCARE EuroQol baseline of 56.2 ± 18.2/55.1 ± 19.7, p = 0.054, and 64 ± 19.9/56.3 ± 21.6; p < 0.01 at the end), and perceived satisfaction was also higher (6.77 ± 0.52 vs. 6.62 ± 0.81, p < 0.001; highest possible score = 7). A trend to mortality decrease was also observed (12.9% vs. 19.3%, p = 0.13). TELECARE was cost-efficacious (TELECARE/UCARE QALY 3.94 Euros/0.81Euros). CONCLUSIONS: The addition of a telemonitoring system to an integrated care model in patients with AHLF decreases hospital and emergency admissions, improves functional status as well as HRQoL, and is cost-efficacious.

20.
Epilepsy Behav ; 125: 108392, 2021 12.
Artigo em Inglês | MEDLINE | ID: mdl-34740089

RESUMO

BACKGROUND: According to the International League Against Epilepsy (ILAE) criteria, epilepsy can be diagnosed after one unprovoked (or reflex) seizure when there is a ≥60% of seizure recurrence in the next decade. The application of this diagnostic criterion, however, is challenging because the risk of recurrence based on different etiologies is not easily retrievable from the literature. OBJECTIVE: To assess etiologies that permit a diagnosis of epilepsy after a single unprovoked seizure. METHODS: We conducted a systematic review of the literature search using PubMed, Scopus, and Cochrane library from January 1950 to December 2020 with the keywords: recurrence, risk of recurrence, absolute risk, risk ratio, risk, seizures, epilepsy, structural, infectious, metabolic, immune, and genetic. We included articles that reported estimates of risks of a subsequent unprovoked seizure. Etiologies were categorized according to the ILAE epilepsy classification. The quality of the evidence was evaluated with PRISMA. Descriptive statistics were used. RESULTS: A total of 25,044 articles resulted from searching three databases. After authors removed duplicates, 18,911 articles remained. We screened by title and abstract, 40 articles were reviewed and finally, two articles were included. The mean follow-up was 8 years and the mean for a risk to present a subsequent unprovoked seizure was 66.6% and included structural etiologies as stroke, traumatic brain injury, cavernous malformation, arteriovenous malformation, and neuroinfections (unspecified agents). Study quality characteristics are classified with low strength of evidence and moderate-quality cohort. CONCLUSIONS: We found that stroke, traumatic brain injury, cavernous or arteriovenous malformations, and unspecified CNS infections can meet the epilepsy diagnosis after one unprovoked seizure based on low strength of evidence and moderate quality of cohorts.


Assuntos
Epilepsia , Estudos de Coortes , Epilepsia/diagnóstico , Epilepsia/etiologia , Humanos , Reflexo , Risco , Convulsões/diagnóstico , Convulsões/etiologia
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA