Publications by authors named "Rojas E"

Air pollution, particularly fine particulate matter (PM2.5), is a global health issue affecting millions. In southern Chile, firewood used for heating exacerbates pollution, especially in winter.

View Article and Find Full Text PDF

Occupational exposure to arsenic (As), cadmium (Cd), and lead (Pb) affects many sectors, necessitating research to understand their transformation mechanisms. In this study, we characterized the process of epithelial-mesenchymal transition (EMT) in a rat hepatic epithelial cell line with decreased expression of catalase and glutamate cysteine ligase catalytic (GCLC) subunit that was exposed to a mixture of As, Cd, and Pb at equimolar occupational exposure concentrations. We evaluated the expression of genes and proteins involved in EMT.

View Article and Find Full Text PDF

Various tools have been proposed for predicting mortality among patients hospitalized with COVID-19 to improve clinical decision-making, the predictive capacities of which vary in different populations. The objective of this study was to develop a model for predicting mortality among patients hospitalized with COVID-19 during their time in a clinical centre. This was a retrospective study that included 201 patients hospitalized with COVID-19.

View Article and Find Full Text PDF

Antiapoptotic Bcl-2 family proteins are involved in myeloma cell survival. To date, their expression in multiple myeloma (MM) patients has mostly been analyzed at the RNA level. In the present study, we quantified for the first time the protein expression of the Bcl2-family members using a capillary electrophoresis immunoassay in 120 newly diagnosed MM patients, aged ≤65 years, treated in the context of the PETHEMA/GEM2012 study.

View Article and Find Full Text PDF

Study Objectives: Screening for early detection of sleep-disordered breathing (SDB) in hospitalized patients has been shown to reduce readmission rates. However, post-discharge polysomnography for confirmation of diagnosis is required. We analyzed factors for "no-shows" using geospatial techniques.

View Article and Find Full Text PDF
Article Synopsis
  • OmpA is an important outer membrane protein that influences bacterial virulence, adhesion, and membrane integrity, but its exact role has been unclear for over 50 years.
  • This study reveals that OmpA plays a key role in organizing the outer membrane protein structure and connects it to the cell wall, helping to maintain the bacteria's protective barrier.
  • The research shows that both parts of OmpA—its β-barrel domain and cell wall-binding domain—are essential for strengthening the bacterial envelope, making it more resilient and crucial for bacterial survival.
View Article and Find Full Text PDF

Natural products (NPs) are crucial for the development of novel antibiotics, anticancer agents, and immunosuppressants. To highlight the ability of fungi to produce structurally diverse NPs, this article focuses on the impact of genome mining and CRISPR-Cas9 technology in uncovering and manipulating the biosynthetic gene clusters (BGCs) responsible for NP synthesis. The CRISPR-Cas9 system, originally identified as a bacterial adaptive immune mechanism, has been adapted for precise genome editing in fungi, enabling targeted modifications, such as gene deletions, insertions, and transcription modulation, without altering the genomic sequence.

View Article and Find Full Text PDF

Premise: The soils in lowland tropics are teeming with microbial life, which can impact plant community structure and diversity through plant-soil feedbacks. While bacteria and fungi have been the focus of most studies in the tropics, oomycetes may have an outsized effect on seed and seedling health and survival, given their affinity for moister, warmer environments.

Methods: We assessed the diversity and pathogenicity of oomycete species present in a lowland tropical forest in Panama.

View Article and Find Full Text PDF

This study explored the feasibility and acceptability of Entre Herman@s, a novel sibling-based intervention designed to engage siblings to increase PrEP utilization among Latino men who have sex with men (LMSM). Siblings were trained in rudimentary motivational interviewing skills to uncover, evoke, and strengthen their brother's motivation to use PrEP, using the constructs of the Information-Motivation-Behavioral Skills (IMB) model for health behavior change. This pilot demonstrated high feasibility, meeting recruitment, retention, and intervention completion targets.

View Article and Find Full Text PDF

Natural Killer (NK) cells are critical innate immune cells involved in the clearance of virally infected and malignant cells. Human NK cells are distinguished by their surface expression of CD56 and a lack of CD3. While CD56 expression and cell surface density has long been used as the prototypic marker to characterize primary human NK cell functional subsets, the exact functional role of CD56 in primary human NK cells is still not fully understood.

View Article and Find Full Text PDF

The current society is becoming increasingly interconnected and hyper-connected. Communication networks are advancing, as well as logistics networks, or even networks for the transportation and distribution of natural resources. One of the key benefits of the evolution of these networks is to bring consumers closer to the source of a resource or service.

View Article and Find Full Text PDF

Unlabelled: The outer membrane is the defining structure of Gram-negative bacteria. We previously demonstrated that it is critical for the mechanical integrity of the cell envelope and therefore to the robustness of the bacterial cell as a whole. Here, to determine the key molecules and moieties within the outer membrane that underlie its contribution to cell envelope mechanics, we measured cell-envelope stiffness across several sets of mutants with altered outer-membrane sugar content, protein content, and electric charge.

View Article and Find Full Text PDF

The bacillus - or rod - is a pervasive cellular morphology among bacteria. Rod-shaped cells elongate without widening by reinforcing their cell wall anisotropically to prevent turgor pressure from inflating cell width. Here, we demonstrate that a constrictive force is also essential for avoiding pressure-driven widening in Gram-positive bacteria.

View Article and Find Full Text PDF
Article Synopsis
  • Patients with immunodeficiency are at a higher risk of developing certain cancers, particularly mature lymphoid neoplasms and lymphoproliferative disorders.
  • A 50-year-old woman on immunosuppressive therapy for dermatomyositis presented with swollen lacrimal glands, weight loss, and night sweats, leading to an elective biopsy.
  • Post-surgery, she experienced acute abdominal issues that revealed multiple organ lesions and ultimately led to a diagnosis of polymorphic B-lymphoproliferative disorder resembling lymphomatoid granulomatosis, a rare condition linked to immunosuppression.
View Article and Find Full Text PDF

Hashtags on Instagram help users globally search for posts to their liking. This study aimed to determine who posts the most popular oral and maxillofacial surgery (OMS) hashtags on Instagram and to evaluate the impact of educational content. The posts were analyzed for the type of post and differences between content creators when posting OMS-related content.

View Article and Find Full Text PDF

The tenacious biofilms formed by are resistant to conventional antibiotics and current treatments. There is a growing need for novel therapeutics that selectively inhibit biofilms while preserving the normal oral microenvironment. Previous studies have shown that increased levels of cyclic di-AMP, an important secondary messenger synthesized by diadenylate cyclase (DAC), favored biofilm formation in .

View Article and Find Full Text PDF

Study Objectives: Obstructive sleep apnea (OSA) is a highly prevalent, yet underdiagnosed, condition. Due to its adverse impact on risk for cardiopulmonary disorders, there is interest in proactive screening of OSA in hospitalized patients. We studied the long-term outcome of such screened patients who were initiated on positive airway pressure therapy.

View Article and Find Full Text PDF

Pre-exposure prophylaxis (PrEP) is a highly effective method for preventing HIV acquisition and plays a crucial role in the Ending the HIV Epidemic in the US initiative. However, there are various barriers that hinder the access and uptake of PrEP among Latino sexual minority men (SMM) at individual, interpersonal, and cultural levels. While the significance of cultural factors in designing and implementing HIV prevention programs for Latino populations has been consistently emphasized in the literature and prioritized by the Centers for Disease Control and Prevention, few studies have directly integrated these cultural factors into their programs.

View Article and Find Full Text PDF
Article Synopsis
  • Bovine babesiosis is a significant disease in cattle caused by a protozoan, and researchers aim to understand the differences between an attenuated vaccine strain and a virulent strain by examining gene expression.
  • A study was conducted where cattle received either the attenuated or virulent strain, and RNA was extracted for comprehensive transcriptomic analysis, revealing over 500 differentially expressed genes.
  • The findings highlighted both common and distinct biological processes between the strains, providing valuable insights into the mechanisms of attenuation and pathogenicity, which could inform future vaccine development.
View Article and Find Full Text PDF

Cellular morphology affects many aspects of cellular and organismal physiology. This makes it challenging to dissect the evolutionary basis for specific morphologies since various cellular functions may exert competing selective pressures on this trait, and the influence of these pressures will depend on the specific mechanisms of morphogenesis. In this light, we combined experiment and theory to investigate the complex basis for morphological diversity among tip-growing cells from across the tree of life.

View Article and Find Full Text PDF

The activated B cell (ABC) subset of diffuse large B-cell lymphoma (DLBCL) is characterized by chronic B-cell receptor signaling and associated with poor outcomes when treated with standard therapy. In ABC-DLBCL, MALT1 is a core enzyme that is constitutively activated by stimulation of the B-cell receptor or gain-of-function mutations in upstream components of the signaling pathway, making it an attractive therapeutic target. We discovered a novel small-molecule inhibitor, ABBV-MALT1, that potently shuts down B-cell signaling selectively in ABC-DLBCL preclinical models leading to potent cell growth and xenograft inhibition.

View Article and Find Full Text PDF

SMARCA4 encodes one of two mutually exclusive ATPase subunits in the BRG/BRM associated factor (BAF) complex that is recruited by transcription factors (TFs) to drive chromatin accessibility and transcriptional activation. SMARCA4 is among the most recurrently mutated genes in human cancer, including ∼30% of germinal center (GC)-derived Burkitt lymphomas. In mice, GC-specific Smarca4 haploinsufficiency cooperated with MYC over-expression to drive lymphomagenesis.

View Article and Find Full Text PDF