Endothelial dysregulation is central to the pathogenesis of acute Plasmodium falciparum infection. It has been assumed that this dysregulation resolves rapidly after treatment, but this return to normality has been neither demonstrated nor quantified. We therefore measured a panel of plasma endothelial markers acutely and in convalescence in Malawian children with uncomplicated or cerebral malaria. Evidence of persistent endothelial activation and inflammation, indicated by increased plasma levels of soluble intracellular adhesion molecule 1, angiopoetin 2, and C-reactive protein, were observed at 1 month follow-up visits. These vascular changes may represent a previously unrecognized contributor to ongoing malaria-associated morbidity and mortality.
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http://dx.doi.org/10.1093/infdis/jit419 | DOI Listing |
Hereditary hemorrhagic telangiectasia is an autosomal dominant disorder caused by mutations in the bone morphogenetic protein signaling pathway, leading to arteriovenous malformations. While previously thought to share molecular and cellular dysregulation, this study reveals highly distinct mechanisms depending on whether mutations occur in Alk1 or SMAD4. Loss of SMAD4 enhances endothelial cell responses to flow, including flow-regulated transcription and cell migration against blood flow, causing excessive pruning of capillaries and the formation of single large shunts.
View Article and Find Full Text PDFESC Heart Fail
January 2025
Université de Strasbourg, Pôle d'Activité Médico-Chirurgicale Cardio-Vasculaire, Nouvel Hôpital Civil, Centre Hospitalier Universitaire, Strasbourg, France.
Background And Objectives: Initially described as a benign acute cardiomyopathy, Takotsubo syndrome has been linked to elevated mortality rates. Emerging evidence suggests that unresolved myocardial inflammation may contribute to this adverse prognosis. This study aimed to evaluate the incremental prognostic utility of C-reactive protein (CRP) in conjunction with the InterTAK prognosis score for stratifying long-term mortality in Takotsubo syndrome.
View Article and Find Full Text PDFAdv Exp Med Biol
January 2025
Lester and Sue Smith Breast Center, Houston, TX, USA.
This chapter reviews tumor-associated myeloid cells, including macrophages, neutrophils, and other innate immune cells, and their multifaceted roles in supporting breast cancer progression and metastasis. In primary tumors, myeloid cells play key roles in promoting tumor epithelial-mesenchymal transition (EMT) and invasion. They can facilitate intravasation (entry into the bloodstream) and colonization, disrupting the endothelial cell layer and reshaping the extracellular matrix.
View Article and Find Full Text PDFCell Stem Cell
January 2025
Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA; Department of Cell and Developmental Biology, University of Pennsylvania, Philadelphia, PA 19104, USA; Penn-Children's Hospital of Philadelphia Lung Biology Institute, University of Pennsylvania, Philadelphia, PA 19104, USA; Penn Cardiovascular Institute, University of Pennsylvania, Philadelphia, PA 19104, USA. Electronic address:
Functional regeneration of the lung's gas exchange surface following injury requires the coordination of a complex series of cell behaviors within the alveolar niche. Using single-cell transcriptomics combined with lineage tracing of proliferating progenitors, we examined mouse lung regeneration after influenza injury, demonstrating an asynchronously phased response across different cellular compartments. This longitudinal atlas of injury responses has produced a catalog of transient and persistent transcriptional alterations in cells as they transit across axes of differentiation.
View Article and Find Full Text PDFMicrobiol Spectr
January 2025
Rickettsial Zoonoses Branch, Centers for Disease Control and Prevention, U.S. Department of Health and Human Services, Atlanta, Georgia, USA.
Mycoplasma (Class: Mollicutes) contamination in cell cultures is a universal concern for research laboratories. Some estimates report contamination in up to 35% of continuous cell lines. Various commercial antibiotic treatments can successfully decontaminate clean cell lines ; however, decontamination of bacterial cultures remains challenging.
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