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Detection of H3F3A K27M or BRAF V600E in liquid biopsies of brain tumor patients as diagnostic and monitoring biomarker: impact of tumor localization and sampling method.
Acta Neuropathol
January 2025
Department of Pediatrics and Adolescent Medicine, Comprehensive Center for Pediatrics and Comprehensive Cancer Center, Medical University of Vienna, Vienna, Austria.
Gliomas are the most common brain tumor type in children and adolescents. To date, diagnosis and therapy monitoring for these tumors rely on magnetic resonance imaging (MRI) and histopathological as well as molecular analyses of tumor tissue. Recently, liquid biopsies (LB) have emerged as promising tool for diagnosis and longitudinal tumor assessment potentially allowing for a more precise therapeutic management.
View Article and Find Full Text PDFSpin Drag Mechanism of Giant Thermal Magnetoresistance.
Phys Rev Lett
December 2024
Department of Physics, University of Washington, Seattle, Washington 98195, USA.
We study hydrodynamic thermal transport in high-mobility two-dimensional electron systems placed in an in-plane magnetic field and identify a new mechanism of thermal magnetotransport. This mechanism is caused by drag between the electron populations with opposite spin polarization, which arises in the presence of a hydrodynamic flow of heat. In high mobility systems, spin drag results in strong thermal magnetoresistance, which becomes of the order of 100% at relatively small spin polarization of the electron liquid.
View Article and Find Full Text PDFEthical Considerations and Implications of Multi-Cancer Early Detection Screening: Reliability, Access and Cost to Test and Treat.
Camb Q Healthc Ethics
January 2025
Precision Health Program, Michigan State University, East Lansing, MI, USA.
This essay focuses on the ethical considerations and implications of providing a universal multi-cancer screening test as the best approach to reduce societal cancer burden in a society with limited funds, resources, and infrastructure. With 1.9 million cancer diagnoses each year in the United States, with 86% of all cancers diagnosed in individuals over the age of 50, and with screening tools approved for only four cancer types (breast, cervical, colorectal, and lung cancer), it seems that a multi-cancer screening test to detect most cancer early that is easy to administer, and is accurate and cost-effective, would be worth considering.
View Article and Find Full Text PDFA fully integrated microfluidic cartridge for rapid and ultrasensitive nucleic acid detection from oropharyngeal swabs.
Lab Chip
January 2025
School of Biomedical Engineering, Tsinghua University, Haidian District, Beijing 100084, China.
Rapid and accurate molecular diagnostics are crucial for preventing the global spread of emerging infectious diseases. However, the current gold standard for nucleic acid detection, reverse transcription polymerase chain reaction (RT-PCR), relies heavily on traditional magnetic beads or silica membranes for nucleic acid extraction, resulting in several limitations, including time-consuming processes, the need for trained personnel, and complex equipment. Therefore, there is an urgent need for fully integrated nucleic acid detection technologies that are simple to operate, rapid, and highly sensitive to meet unmet clinical needs.
View Article and Find Full Text PDFLow-Pass Whole Genome Sequencing of Cell-Free DNA from Cerebrospinal Fluid: A Focus on Pediatric Central Nervous System Tumors.
Clin Chem
January 2025
Division of Hematology, Oncology, Bone Marrow Transplant & Cellular Therapy, Department of Pediatrics, Seattle Children's Hospital, University of Washington, Seattle, WA, United States.
Background: Cell-free DNA (cfDNA) technology has allowed for cerebrospinal fluid (CSF), a previously underutilized biofluid, to be analyzed in new ways. The interrogation of CSF-derived cfDNA is giving rise to novel molecular insights, particularly in pediatric central nervous system (CNS) tumors, where invasive tumor tissue acquisition may be challenging. Contemporary disease monitoring is currently restricted to radiographic surveillance by magnetic resonance imaging and CSF cytology to directly detect abnormal cells and cell clusters.
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