Publications by authors named "Roman Lopez"

Direct-acting antivirals (DAA) are effective in patients with hepatitis C virus (HCV) infection, but there is little information about real-world effectiveness in people living with human immunodeficiency virus (PLH). The aim of this study was to determinate the effectiveness of DAA to achieve sustained virologic response at week 12 post-treatment (SVR12) in PLH with HCV coinfection and in people with HCV-monoinfection. We conducted a prospective cohort.

View Article and Find Full Text PDF

In recent decades, technological advances have been made in the field of radiotherapy and with it the emergence of new dosimetric systems for their calibration and commissioning, among other uses. Such is the case of the measurement in the build-up region, where there is no charged-particle equilibrium, which is reflected in the increase in surface dose for patient treatments and potential skin toxicities as a secondary effect. This study utilizes optically stimulated dosemeters (nanoDot) and the radiochromic film (EBT3) to measure skin doses in patients with head and neck cancer who received radiotherapy.

View Article and Find Full Text PDF

Objective: To introduce MexOMICS, a Mexican Consortium focused on establishing electronic databases to collect, cross-reference, and share health-related and omics data on the Mexican population.

Methods: Since 2019, the MexOMICS Consortium has established three electronic-based registries: the Mexican Twin Registry (TwinsMX), Mexican Lupus Registry (LupusRGMX), and the Mexican Parkinson's Research Network (MEX-PD), designed and implemented using the Research Electronic Data Capture web-based application. Participants were enrolled through voluntary participation and on-site engagement with medical specialists.

View Article and Find Full Text PDF

TwinsMX registry is a national research initiative in Mexico that aims to understand the complex interplay between genetics and environment in shaping physical and mental health traits among the country's population. With a multidisciplinary approach, TwinsMX aims to advance our knowledge of the genetic and environmental mechanisms underlying ethnic variations in complex traits and diseases, including behavioral, psychometric, anthropometric, metabolic, cardiovascular and mental disorders. With information gathered from over 2800 twins, this article updates the prevalence of several complex traits; and describes the advances and novel ideas we have implemented such as magnetic resonance imaging.

View Article and Find Full Text PDF

In this work, both undoped and Thulium (Tm) doped (0.3-10 mol%) magnesium pyrophosphate (MgPO) powders were synthesized by the solvent evaporation method to study their photo-and thermoluminescent properties. Two crystalline phases were observed in the powders by X-Ray diffraction (XRD), the main phase being MgPO and the second one thulium phosphate (TmPO).

View Article and Find Full Text PDF

Astigmatism and myopia are two common ocular refractive errors that can impact daily life, including learning and productivity. Current knowledge suggests that the etiology of these conditions is the result of a complex interplay between genetic and environmental factors. Studies in populations of European ancestry have demonstrated a higher concordance of refractive errors in monozygotic (MZ) twins compared to dizygotic (DZ) twins.

View Article and Find Full Text PDF

VEXAS (vacuoles, E1 enzyme, X-linked, autoinflammatory, somatic) syndrome is a newly described autoinflammatory entity caused by a UBA-1 gene mutation. Among the most frequent symptoms it produces fever, cytopenias, polychondritis, pulmonary infiltrates and up to 40% ocular involvement such as periorbital edema, uveitis, episcleritis, scleritis and retinal vasculitis. Patients respond to high doses of corticosteroids, however, many end up being refractory to them and to the classic immunosuppressants.

View Article and Find Full Text PDF

The COVID-19 pandemic has posed a significant global threat, leading to several initiatives for its control and management. One such initiative involves wastewater-based epidemiology, which has gained attention for its potential to provide early warning of virus outbreaks and real-time information on its spread. In this study, wastewater samples from two wastewater treatment plants (WWTPs) located in the southeast of Spain (region of Murcia), namely Murcia, and Cartagena, were analyzed using RT-qPCR and high-throughput sequencing techniques to describe the evolution of SARS-CoV-2 in the South-East of Spain.

View Article and Find Full Text PDF

Objectives: To describe risk factors for mortality and clinical characteristics in patients with mpox infection at a reference hospital in Mexico.

Design: A prospective cohort study was conducted from September to December 2022 at Hospital de Infectología La Raza National Medical Center.

Methods: Study participants were patients that met operational definition of confirmed case of mpox according to WHO criteria.

View Article and Find Full Text PDF

This work reports on the thermoluminescence (TL) properties and detection of contaminating minerals isolated from Mexican cocoa beans irradiated with gamma radiation and stored for 4 years. Contaminating minerals isolated from cocoa beans consisting of quartz, diopside, plagioclase, albite, and iron oxide with irregular and rectangular grains and average length of 135 μm. Cocoa beans are detected as irradiated even after 4 years of storage using the shape and maximum temperature of the TL glow curve of contaminating minerals.

View Article and Find Full Text PDF
Article Synopsis
  • Episodic memory helps us recall three key aspects of an event: what happened, where it happened, and when it took place.
  • The study investigates how different brain signals, specifically ERP components and EEG theta band activity, relate to retrieving these aspects in memory tasks, distinguishing between total retrieval, spatial retrieval, and correctly identifying new items.
  • Findings indicate that attention mechanisms and familiarity markers are involved in memory retrieval, showing that different types of relevant memory information are accessed without combining their effects.
View Article and Find Full Text PDF

During their clinical practice, nursing students face a number of complex clinical situations, which may include treating victims of sex trafficking. These clinical experiences can lead to stress for the nursing students, which may hinder their learning process. Nonetheless, there is very little educational training provided in nursing programmes on this topic.

View Article and Find Full Text PDF

In this investigation, the Continuous-Wave Optically Stimulated Luminescence (CW-OSL) properties of polyminerals extracted from Mexican and Peruvian Guajillo chilli were studied using a source of cesium-137 (Cs-137) gamma radiation. The Guajillo chilli polyminerals were stimulated with blue light for 120 s, and their luminescence was detected in the UV region. The General Order Kinetics (GOK) deconvolution analysis of the CW-OSL curves was carried out using three individual components.

View Article and Find Full Text PDF

Thyrotoxic periodic paralysis is a life-threatening complication of hyperthyroidism characterized by transient episodes of muscle paralysis and hypokalemia, commonly seen in Asian men. We present a rare case of ventricular fibrillation as the initial presentation of thyrotoxic periodic paralysis. ().

View Article and Find Full Text PDF

Unlabelled: Attention allows us to select relevant information from the background. Although several studies have described that cannabis use induces deleterious effects on attention, it remains unclear if cannabis dependence affects the attention network systems differently.

Objectives: To evaluate whether customary consumption of cannabis or cannabis dependence impacts the alerting, orienting, and executive control systems in young adults; to find out whether it is related to tobacco or alcohol dependence and if cannabis use characteristics are associated with the attention network systems.

View Article and Find Full Text PDF
Article Synopsis
  • Attention and working memory (WM) are significantly influenced by genetics, particularly through variations in the CNR1 gene that encodes the CB1 receptor.
  • The study examined the relationships between three specific SNPs of the CNR1 gene (rs1406977, rs2180619, and rs1049353) and performance in attention tasks and working memory using healthy participants.
  • Results indicated that while the three SNPs were individually associated with attention performance, the greatest effect came from the combined genotype, showing that more G-alleles corresponded to better attention, although the number of risk alleles did not predict WM performance or the efficiency of attention systems.
View Article and Find Full Text PDF

TwinsMX is a national twin registry in Mexico recently created with institutional support from the Universidad Nacional Autónoma de México. It aims to serve as a platform to advance epidemiological and genetic research in the country and to disentangle the genetic and environmental contributions to health and disease in the admixed Mexican population. Here, we describe our recruitment and data collection strategies and discuss both the progress to date and future directions.

View Article and Find Full Text PDF

Background: Breast surgery is considered a clean surgery. However, surgical-site infection (SSI) rates are currently higher than predicted. Postoperative drains remain in situ for several days, with inevitable bacterial colonization and increased SSI risk.

View Article and Find Full Text PDF

International guidelines recommend adapting military health care protocols to emergencies involving multiple intentional-injury victims in civilian environments. Adaptations can reflect similarities in types of injuries or issues of provider safety and that arise in military and some civilian emergencies. Because more experience with such incidents has been gained in the United States, most of the literature on this topic discusses emergency medical systems that differ from the ones operating in the autonomous communities of Spain, where varying resources and procedures are mandated by local authorities charged with preparing for emergencies.

View Article and Find Full Text PDF

Differences between working memory maintenance (Mt) and manipulation (Mp) have been studied, mostly in the absence of stimuli (); and phases have been less explored. The present study assessed differences between Mt and Mp, by means of event-related potentials (ERPs) and event-related synchronisation (ERS) and desynchronisation (ERD) for theta, alpha and beta bands at: , and ; using a delayed-match to sample task (DMST). Twenty-six young volunteers solved two DMST conditions (one for Mt and one for Mp).

View Article and Find Full Text PDF

Aims: To explore and understand the experiences of terminally ill patients and their relatives regarding dignity during end-of-life care in the emergency department.

Background: The respect given to the concept of dignity is significantly modifying the clinical relationship and the care framework involving the end-of-life patient in palliative care units, critical care units, hospices and their own homes. This situation is applicable to in-hospital emergency departments, where there is a lack of research which takes the experiences of end-of-life patients and their relatives into account.

View Article and Find Full Text PDF

This paper reports on an investigation into the thermally stimulated luminescence (TL) and optically stimulated luminescence (OSL) characteristics of novel luminescent phosphor. A new Pr-doped, lanthanum aluminate (LaAlO)-based luminescent phosphor is developed. Samples of LaAlO:Pr were irradiated to beta doses, in air, from 0.

View Article and Find Full Text PDF

Intracellular pathogenic microorganisms and toxins exploit host cell mechanisms to enter, exert their deleterious effects as well as hijack host nutrition for their development. A potential approach to treat multiple pathogen infections and that should not induce drug resistance is the use of small molecules that target host components. We identified the compound 1-adamantyl (5-bromo-2-methoxybenzyl) amine (ABMA) from a cell-based high throughput screening for its capacity to protect human cells and mice against ricin toxin without toxicity.

View Article and Find Full Text PDF

Aims And Objectives: To characterise the intratheoretical interests of knowledge in nursing science as an epistemological framework for fundamental care.

Background: For Jürgen Habermas, theory does not separate knowledge interests from life. All knowledge, understanding and human research is always interested.

View Article and Find Full Text PDF

In this work, the continuous wave - optically stimulated luminescence (CW-OSL) emissions of natural salt minerals, collected from Dead Sea in summer of 2015, were studied. The CW-OSL dose response of natural salt showed a linear range between 0.5Gy and 10Gy of gamma radiation of Co.

View Article and Find Full Text PDF