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Intercellular mRNA transfer alters the human pluripotent stem cell state.
Proc Natl Acad Sci U S A
January 2025
Human Biology Research Unit, Institute of Integrated Research, Institute of Science Tokyo, Bunkyo-ku, Tokyo 113-8510, Japan.
Intercellular transmission of messenger RNA (mRNA) is being explored in mammalian species using immortal cell lines. Here, we uncover an intercellular mRNA transfer phenomenon that allows for the adaptation and reprogramming of human primed pluripotent stem cells (hPSCs). This process is induced by the direct cell contact-mediated coculture with mouse embryonic stem cells under the condition impermissible for primed hPSC culture.
View Article and Find Full Text PDFTranslation of the downstream ORF from bicistronic mRNAs by human cells: Impact of codon usage and splicing in the upstream ORF.
Protein Sci
February 2025
Laboratory MIVEGEC (Univ. Montpellier, CNRS, IRD), French National Center for Scientific Research (CNRS), Montpellier, France.
Biochemistry textbooks describe eukaryotic mRNAs as monocistronic. However, increasing evidence reveals the widespread presence and translation of upstream open reading frames preceding the "main" ORF. DNA and RNA viruses infecting eukaryotes often produce polycistronic mRNAs and viruses have evolved multiple ways of manipulating the host's translation machinery.
View Article and Find Full Text PDFWDR74-Mediated Ribosome Biogenesis and Proteome Dynamics During Mouse Preimplantation Development.
Genes Cells
January 2025
Advanced Biological Information Research Division, INAMORI Frontier Research Center, Kyushu University, Fukuoka, Japan.
Preimplantation embryonic development is orchestrated by dynamic changes in the proteome and transcriptome, regulated by mechanisms such as maternal-to-zygotic transition. Here, we employed label-free quantitative proteomics to comprehensively analyze proteome dynamics from germinal vesicle oocytes to blastocysts in mouse embryos. We identified 3490 proteins, including 715 consistently detected across all stages, revealing stage-specific changes in proteins associated with translation, protein modification, and mitochondrial metabolism.
View Article and Find Full Text PDFCAMKIIδ Reinforces Lipid Metabolism and Promotes the Development of B Cell Lymphoma.
Adv Sci (Weinh)
January 2025
Cancer Institute (Key Laboratory of Cancer Prevention and Intervention, China National Ministry of Education), Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310009, China.
The most prevalent types of lymphomas are B cell lymphomas (BCL). Newer therapies for BCL have improved the prognosis for many patients. However, approximately 30% with aggressive BCL either remain refractory or ultimately relapse.
View Article and Find Full Text PDFSingle-cell transcriptomics reveals the heterogeneity and function of mast cells in human ccRCC.
Front Immunol
January 2025
Department of Urology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, China.
Introduction: The role of mast cells (MCs) in clear cell renal carcinoma (ccRCC) is unclear, and comprehensive single-cell studies of ccRCC MCs have not yet been performed.
Methods: To investigate the heterogeneity and effects of MCs in ccRCC, we studied single-cell transcriptomes from four ccRCC patients, integrating both single-cell sequencing and bulk tissue sequencing data from online sequencing databases, followed by validation via spatial transcriptomics and multiplex immunohistochemistry (mIHC).
Results: We identified four MC signature genes (TPSB2, TPSAB1, CPA3, and HPGDS).
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