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Emergence and evolution of heterocyte glycolipid biosynthesis enabled specialized nitrogen fixation in cyanobacteria.
Proc Natl Acad Sci U S A
February 2025
Department of Marine Microbiology and Biogeochemistry, Royal Netherlands Institute for Sea Research (NIOZ), Den Burg 1790 AB, The Netherlands.
Heterocytes, specialized cells for nitrogen fixation in cyanobacteria, are surrounded by heterocyte glycolipids (HGs), which contribute to protection of the nitrogenase enzyme from oxygen. Diverse HGs preserve in the sediment and have been widely used as evidence of past nitrogen fixation, and structural variation has been suggested to preserve taxonomic information and reflect paleoenvironmental conditions. Here, by comprehensive HG identification and screening of HG biosynthetic gene clusters throughout cyanobacteria, we reconstruct the convergent evolutionary history of HG structure, in which different clades produce the same HGs.
View Article and Find Full Text PDFHeparin-Binding Protein in Cerebrospinal Fluid as a Biomarker for Bacterial Meningitis: A Study of Diagnostic Accuracy.
Ann Neurol
January 2025
Department of Neurology, Amsterdam Neuroscience, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands.
Objective: We aimed to evaluate the diagnostic accuracy of heparin-binding protein (HBP) in cerebrospinal fluid for the diagnosis of bacterial meningitis in patients with a suspected central nervous system infection.
Methods: This prospective multicenter cohort study determined the diagnostic accuracy of HBP in cerebrospinal fluid (CSF) for bacterial meningitis among a cohort of consecutive patients with a suspected central nervous infection. The final clinical diagnosis was considered the reference standard.
Lung cancer is a leading cause of cancer-related mortality, with disparities in incidence and outcomes observed across different racial and sex groups. Understanding the genetic factors of these disparities is critical for developing targeted treatment therapies. This study aims to identify both patient-specific and cohort-specific biomarker genes that contribute to lung cancer health disparities among African American males (AAMs), European American males (EAMs), African American females (AAFs), and European American females (EAFs).
View Article and Find Full Text PDFPrognostic impact of inflammatory and nutritional biomarkers in pancreatic cancer.
World J Clin Oncol
January 2025
Department of Radiation Oncology, GenesisCare-San Francisco de Asís University Hospital, Madrid 28002, Spain.
Pancreatic cancer is usually associated with a poor prognosis. Surgery is the main curative treatment but pancreatic operations are aggressive and new tools that help clinicians to predict surgical and prognostic outcomes are necessary. Lu recently published a retrospective, single centre cohort study evaluating the impact of seven nutritional and inflammatory markers in pancreatic cancer surgical patients: The albumin-to-globulin ratio, prognostic nutritional index (PNI), systemic immune-inflammation index (SII), neutrophil-to-lymphocyte ratio (NLR), platelet-to-lymphocyte ratio (PLR), nutritional risk index, and the geriatric nutritional risk index.
View Article and Find Full Text PDFThe diagnosis of eosinophilic granulomatosis with polyangiitis has been 'masked' by asthma: a case report.
AME Case Rep
December 2024
The PLA Center of Respiratory and Allergic Disease Diagnosing Management, General Hospital of Northern Theater Command, Shenyang, China.
Background: Patients with asthma exhibit a significantly heightened susceptibility to eosinophilic granulomatosis with polyangiitis (EGPA) when compared to the general population. Vigilance for EGPA manifestations is crucial, especially in cases where asthma remains poorly controlled despite high-dose corticosteroid therapy or when eosinophil counts exceed 5%. The diagnosis of EGPA can be complex due to the absence of definitive biomarkers, as indicated by the American College of Rheumatology (ACR)'s 1990 classification criteria.
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