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Polarity reversal, or "umpolung", is a widely acknowledged strategy to allow organic functional groups amenable to react in alternative ways to the usual preference set by their electronic features. In this article, we demonstrate that cyclohexyne umpolung, realized through complexation to zirconocene, makes the small strained cycloalkyne amenable to C-F bond functionalisation. Such strong bond activation chemistry is unprecedented in "free" aryne and strained alkyne chemistry.
View Article and Find Full Text PDFA chemically modified DNAzyme-based electrochemical sensor for binary and highly sensitive detection of reactive oxygen species.
Chem Sci
January 2025
School of Chemistry and Materials Science, Jiangsu Normal University Xuzhou 221116 China
Reactive oxygen species (ROS) play a critical role in regulating various physiological processes. To gain a comprehensive understanding of their distinct functions in different physiological events, it is imperative to detect binary ROS simultaneously. However, the development of the sensing method capable of binary ROS detection remains a significant challenge.
View Article and Find Full Text PDFMechanistic exploration of Traditional Chinese Medicine regulation on tumor immune microenvironment in the treatment of triple-negative breast cancer: based on CiteSpace and bioinformatics analysis.
Front Immunol
January 2025
Department of Breast and Thyroid Surgery, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, China.
Background: Triple-negative breast cancer (TNBC) is a highly aggressive subtype of breast cancer, characterized by frequent recurrence, metastasis, and poor survival outcomes despite chemotherapy-based treatments. This study aims to investigate the mechanisms by which Traditional Chinese Medicine (TCM) modulates the tumor immune microenvironment in TNBC, utilizing CiteSpace and bioinformatics analysis.
Methods: We employed CiteSpace to analyze treatment hotspots and key TCM formulations, followed by bioinformatics analysis to identify the main active components, targets, associated pathways, and their clinical implications in TNBC treatment.
AKT activation participates in Fascin-1-induced EMT in hepatoma cells.
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The Second Department of General Surgery, First Affiliated Hospital of Dali University, Dali, 671000 Yunnan China.
Unlabelled: High expression of Fascin-1 involves high metastasis, high recurrence, and poor prognosis of cancers. However, the related regulatory mechanism in hepatocellular carcinoma (HCC) remains elusive. In this study, Fascin-1 was highly expressed in HCC tissues and cell lines.
View Article and Find Full Text PDFDisentangling protein metabolic costs in human cells and tissues.
PNAS Nexus
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Logic of Genomic Systems Laboratory (CNB-CSIC), Madrid E-28049, Spain.
While more data are becoming available on gene activity at different levels of biological organization, our understanding of the underlying biology remains incomplete. Here, we introduce a metabolic efficiency framework that considers highly expressed proteins (HEPs), their length, and biosynthetic costs in terms of the amino acids (AAs) they contain to address the observed balance of expression costs in cells, tissues, and cancer transformation. Notably, the combined set of HEPs in either cells or tissues shows an abundance of large and costly proteins, yet tissues compensate this with short HEPs comprised of economical AAs, indicating a stronger tendency toward mitigating costs.
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