Publications by authors named "Tomas L"

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  • Helicobacter pylori (H. pylori) is a type of bacteria that can live in the human stomach and make people sick by causing infections.
  • This bacteria has clever ways to hide from the body's immune system, such as changing its surface to avoid detection and blocking important signals that help fight infections.
  • Scientists used a special imaging technique on mice to see how immune cells, like neutrophils and macrophages, react to H. pylori in real-time, which helps them understand how infections work better.
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  • Research shows that despite current prevention methods, early recurrent strokes are still common, especially in patients with atherosclerosis, with over 10% experiencing repeat events.
  • A new mouse model revealed that strokes activate the AIM2 inflammasome in atherosclerotic plaques due to increased circulating cell-free DNA, leading to inflammation, plaque destabilization, and recurrent strokes.
  • Targeting the mechanisms of DNA-mediated inflammasome activation may offer new treatment options to reduce the high rate of recurrent strokes in at-risk patients.
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Research impact is an important measure of the effective transmission and ongoing contribution of research beyond the scope of initial research publication outputs; however, determining what constitutes 'high-for-impact' research can be difficult for specific fields of study. This review of the Australian Research Council's Engagement and Impact Assessment 2018 analyses high-for-impact case studies submitted in the fields of Education (n = 17) and Studies in Human Society (n = 11) with the aim of understanding and explicating how high impact research has been evidenced in these fields. The review was guided by three research questions that concern the identification of the key characteristics of high-for-impact case studies, their reported impacts, and the evidence researchers cite to support claims of impact.

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  • * Crykey is introduced as a new computational tool that identifies linked-read mutations across the entire genome of SARS-CoV-2 efficiently.
  • * The tool has been tested on thousands of wastewater and clinical samples, revealing hundreds of cryptic mutations and their links between wastewater and clinical sources over three years.
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The study of the propagation of infectious diseases in urban centers finds a close connection with their population's social characteristics and behavior. This work performs a spatial analysis of dengue cases in urban centers based on the basic reproduction numbers, , and incidence by planning areas (PAs), as well as their correlations with the Human Development Index (HDI) and the number of trips. We analyzed dengue epidemics in 2002 at two Brazilian urban centers, Belo Horizonte (BH) and Rio de Janeiro (RJ), using PAs as spatial units.

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Aims: Invariant natural killer T (iNKT) cells, a T cell subset that is CD1d-restricted and expresses a semi-invariant T cell receptor, have been proposed to contribute to dyslipidaemia-driven cardiovascular disease due to their ability to specifically recognize lipid antigens. Studies in mice have attributed pro-atherogenic properties to iNKT cells, but studies in humans investigating associations of iNKT cells with incident coronary events (CE) are lacking.

Methods And Results: Here, we used flow cytometry to enumerate circulating iNKT cells (CD3 CD1d-PBS57-Tetramer) in a case-control cohort nested within the prospective population-based Malmö Diet and Cancer Study ( = 416) to explore associations with incident first-time CE during a median follow-up of 14 years.

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  • Crykey is a computational tool designed to quickly find rare cryptic mutations of SARS-CoV-2, specifically focusing on linked-read mutations that are not well-documented in existing databases and may indicate new lineages in wastewater.
  • The tool addresses a gap in the ability to efficiently analyze cryptic mutations across the entire SARS-CoV-2 genome using a large number of samples.
  • In evaluating Crykey with over 3,000 wastewater and 22,000 clinical samples, researchers discovered hundreds of cryptic mutations, monitored their presence across various wastewater treatment plants over three years, and noted similarities between mutations in wastewater and clinical samples, suggesting they could represent real cryptic lineages.
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  • - Transmissible cancers like bivalve transmissible neoplasia (BTN) can spread between marine organisms, particularly affecting species like the common cockle (Cerastoderma edule) along the Atlantic coasts of Europe and Africa.
  • - Researchers examined over 6,800 cockles, diagnosed 390 cases of BTN tumors, and analyzed genomic variation in 61 tumors, confirming the presence of two BTN lineages with links to blood cell origins.
  • - The study found significant genomic instability in the BTN tumors, including whole-genome duplications and mutations, and suggested a long history of clonal evolution in these transmissible cancers.
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Maladaptive, non-resolving inflammation contributes to chronic inflammatory diseases such as atherosclerosis. Because macrophages remove necrotic cells, defective macrophage programs can promote chronic inflammation with persistent tissue injury. Here, we investigated the mechanisms sustaining vascular macrophages.

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  • Wastewater-based epidemiology, specifically the COVIDBENS program in A Coruña, Spain, tracked COVID-19 from June 2020 to March 2022 to provide early warnings for public health decisions.
  • Using RT-qPCR and Illumina sequencing, the program monitored viral loads and detected SARS-CoV-2 mutations, significantly improving surveillance by estimating real infection rates and variant frequencies.
  • The analysis identified six waves of viral load and successfully anticipated community outbreaks 8-36 days before clinical reports, enabling faster responses from local authorities and adaptation by industrial companies.
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Macrophages are crucial effector cells of the innate immune system and have important roles in the initiation and resolution of inflammation as well as in tissue homeostasis. To fulfill these diverse roles, macrophages exhibit metabolic flexibility to quickly adapt to the needs of the effector functions required, as well as to the microenvironment. This metabolic flexibility is exemplified by proinflammatory macrophages, which upregulate glycolysis to both initiate and sustain the process of inflammation.

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Unlabelled: Estimation of children's chronological age is highly important in human and forensic sciences. The Demirjian method has been reported as accurate for this purpose. The literature review shows some evidence that the accuracy of estimating chronological age via the Demirjian standards is not a straightforward process.

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  • The study investigates how analyzing circulating tumor cells (CTCs) from blood can provide valuable insights into cancer treatment effectiveness and survival predictions for metastatic colorectal cancer (mCRC) patients.
  • Researchers compared different methods for collecting CTCs—CellSearch, Parsortix, and FACS—and found that the genomic mutations varied based on the method used.
  • Results showed that CTCs from Parsortix and CellSearch methods presented genomic features similar to those of the primary tumors, while FACS enrichment resulted in misleading diversity estimates due to sequencing errors; this underscores the potential of CTC analysis in personalizing cancer treatment.
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Background: There are studies, which suggest that some diazocine derivatives can exert effects on the cardiovascular system; however, these effects are not very clear.

Objective: The aim of this research was to evaluate the biological activity of a diazocine derivative against heart failure translated as area infarct.

Methods: Biological activity produced by diazocine derivatives against heart failure was determinate using an ischemia/reperfusion injury model.

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  • - The recurrence of tumor cells in metastatic colorectal cancer (mCRC) poses a major challenge even after surgical removal of metastases, highlighting the need to study the evolution of these recurrent tumors.
  • - A unique dataset from single-cell whole-genome sequencing of recurrent liver lesions in an mCRC patient revealed that a certain tumor lineage survived surgery and continued to evolve, despite undergoing chemotherapy for two years.
  • - The study found that chemotherapy significantly contributed to mutations in tumor cells, suggesting that some mCRC subclones can migrate and adapt after treatment, leading to rapid regrowth of tumors.
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The antiviral immune response to SARS-CoV-2 infection can limit viral spread and prevent development of pneumonic COVID-19. However, the protective immunological response associated with successful viral containment in the upper airways remains unclear. Here, we combine a multi-omics approach with longitudinal sampling to reveal temporally resolved protective immune signatures in non-pneumonic and ambulatory SARS-CoV-2 infected patients and associate specific immune trajectories with upper airway viral containment.

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Background: Several drugs with inotropic activity have been synthesized; however, there is very little information on biological activity exerted by steroid derivatives in the cardiovascular system.

Objective: The aim of this research was to prepare a steroid-pyridine derivative to evaluate the effect it exerts on left ventricular pressure and characterize its molecular interaction.

Methods: The first stage was carried out through the synthesis of a steroid-pyridine derivative using some chemical strategies.

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Background: Tissue-resident macrophages have mixed developmental origins. They derive in variable extent from yolk sac (YS) hematopoiesis during embryonic development. Bone marrow (BM) hematopoietic progenitors give rise to tissue macrophages in postnatal life, and their contribution increases upon organ injury.

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Monocytes and macrophages play essential roles in all stages of atherosclerosis - from early precursor lesions to advanced stages of the disease. Intima-resident macrophages are among the first cells to be confronted with the influx and retention of apolipoprotein B-containing lipoproteins at the onset of hypercholesterolemia and atherosclerosis development. In this review, we outline the trafficking of monocytes and macrophages in and out of the healthy aorta, as well as the adaptation of their migratory behaviour during hypercholesterolemia.

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This paper assesses the challenges and the benefits of 2 methodological approaches for improving the study of transnational mobilities of older adults: mixed methods and inclusiveness. The first approach refers to a mixed-methods research design based on surveys and qualitative interviews. We share our experience of conducting a "fully mixed-concurrent-equal-status-design" research project, for which we collected data through quantitative surveys on transnational practices of people aged 55+.

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Topological analysis and community detection in mobility complex networks have an essential role in many contexts, from economics to the environmental agenda. However, in many cases, the dynamic component of mobility data is not considered directly. In this paper, we study how topological indexes and community structure changes in a business day.

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In our hands, efficient access to the 4-amino-3-carboxamide disubstituted pyridine-2(1)-one kinase hinge-binder motif proved to be more challenging than anticipated requiring a significant investment in route scouting and optimization. This full paper focuses on the synthesis issues that we encountered during our route exploration and the original solutions we found that helped us to identify two optimized library-style processes to prepare our large kinase inhibitor library.

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Background: Colorectal cancer (CRC) development is generally accepted as a sequential process, with genetic mutations determining phenotypic tumor progression. However, matching genetic profiles with histological transition requires the analyses of temporal samples from the same patient at key stages of progression.

Results: Here, we compared the genetic profiles of 34 early carcinomas with their respective adenomatous precursors to assess timing and heterogeneity of driver alterations accompanying the switch from benign adenoma to malignant carcinoma.

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Article Synopsis
  • * Compounds 4 and 5 were highlighted for their significant ability to reduce heart failure symptoms, specifically by decreasing the infarct area compared to other tested compounds.
  • * Both compounds lowered left ventricular pressure in a dose-dependent way, and this effect was significantly blocked by the presence of methoctramine, indicating their action involves M-muscarinic receptor activation.
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Objective: CD4CD28 T cells have been shown to be associated with recurrent coronary events and suggested as potential biomarker and therapeutic target. It is unknown whether CD4CD28 T cells associate with first-time cardiovascular events. We examined CD4CD28 T cells in a prospective population-based cohort and in patients with advanced atherosclerosis.

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