In this issue, Deblois and colleagues show how taxane-resistant triple-negative breast cancer cells evade viral mimicry response as a result of metabolic alteration, DNA hypomethylation, and relocation of histone H3K27 trimethylation (H3K27me3). This adaptation confers a therapeutic vulnerability to the inhibition of the H3K27me3 methyltransferase EZH2 in resistant cells, leading to tumor growth inhibition by viral mimicry reactivation..
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http://dx.doi.org/10.1158/2159-8290.CD-20-0947 | DOI Listing |
Pept Sci (Hoboken)
November 2024
Department of Pediatrics, Section of Hematology/Oncology, The University of Chicago, Chicago, Illinois 60637, United States of America.
The COVID-19 pandemic drove a uniquely fervent pursuit to explore the potential of peptide, antibody, protein, and small-molecule based antiviral agents against severe acute respiratory syndrome-coronavirus 2 (SARS-CoV-2). The interaction between the SARS-CoV2 spike protein with the angiotensin-converting enzyme 2 (ACE2) receptor that mediates viral cell entry was a particularly interesting target given its well described protein-protein interaction (PPI). This PPI is mediated by an α-helical portion of ACE2 binding to the receptor binding domain (RBD) of the spike protein and thought to be susceptible to blockade through molecular mimicry.
View Article and Find Full Text PDFJ Mater Chem B
January 2025
Department of Chemical Engineering, University of Seoul, Republic of Korea.
Current cancer treatments, including chemotherapy, surgery, and radiation, often present significant challenges such as severe side effects, drug resistance, and damage to healthy tissues. To address these issues, we introduce a virus-inspired RNA mimicry approach, specifically through the development of uridine-rich nanoparticles (UNPs) synthesized using the rolling circle transcription (RCT) technique. These UNPs are designed to mimic the poly-U tail sequences of viral RNA, effectively engaging RIG-I-like receptors (RLRs) such as MDA5 and LGP2 in cancer cells.
View Article and Find Full Text PDFGut
January 2025
State Key Laboratory of Oncology in South China and Guangdong Provincial Clinical Research Center for Cancer, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, China
Background: The resistance of pancreatic ductal adenocarcinoma (PDAC) to trametinib therapy limits its clinical use. However, the molecular mechanisms underlying trametinib resistance in PDAC remain unclear.
Objective: We aimed to illustrate the mechanisms of resistance to trametinib in PDAC and identify trametinib resistance-associated druggable targets, thus improving the treatment efficacy of trametinib-resistant PDAC.
Immunity
January 2025
Garvan Institute of Medical Research, Darlinghurst, NSW, Australia; St Vincent's Clinical School, UNSW Sydney, Sydney, NSW, Australia. Electronic address:
The unexplained association between infection and autoimmune disease is strongest for hepatitis C virus-induced cryoglobulinemic vasculitis (HCV-cryovas). To analyze its origins, we traced the evolution of pathogenic rheumatoid factor (RF) autoantibodies in four HCV-cryovas patients by deep single-cell multi-omic analysis, revealing three sources of B cell somatic mutation converged to drive the accumulation of a large disease-causing clone. A method for quantifying low-affinity binding revealed recurring antibody variable domain combinations created by V(D)J recombination that bound self-immunoglobulin G (IgG) but not viral E2 antigen.
View Article and Find Full Text PDFChronically persistent viruses are integral components of the organismal ecosystem in humans and animals . Many of these viruses replicate and accumulate within the cell nucleus . The nuclear location allows viruses to evade cytoplasmic host viral sensors and promotes viral replication .
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