N 6-Methyladenosine mRNA Forms Condensates to Promote AML Cell Survival

    Cancer Discovery
    |June 5, 2021
    PubMed

    Insights

    In myeloid leukemia, the nuclear reader YTHDC1 binds to m6A-modified messenger RNA (mRNA). This interaction leads to the formation of nuclear condensates, influencing gene expression in cancer.

    Area of Science:

    • Molecular Biology
    • Cancer Research
    • Epigenetics

    Background:

    • Myeloid leukemia is a group of cancers affecting blood and bone marrow.
    • Messenger RNA (mRNA) modifications play crucial roles in gene regulation.
    • Nuclear condensates are emerging as important structures in cellular processes.

    Purpose of the Study:

    • To investigate the role of the nuclear reader YTHDC1 in myeloid leukemia.
    • To understand the interaction between YTHDC1 and m6A-modified mRNA.
    • To explore the formation and function of nuclear condensates in this context.

    Main Methods:

    • Immunoprecipitation of m6A-modified mRNA.
    • Co-immunoprecipitation assays to detect YTHDC1 binding.
    • Cellular imaging to visualize nuclear condensate formation.

    Main Results:

    • YTHDC1 was found to bind specifically to m6A-modified mRNA in myeloid leukemia cells.
    • Binding of YTHDC1 to mRNA induced the formation of distinct nuclear condensates.
    • These condensates sequester specific mRNA transcripts within the nucleus.

    Conclusions:

    • YTHDC1 acts as a nuclear reader for m6A-modified mRNA in myeloid leukemia.
    • The formation of YTHDC1-bound nuclear condensates is a key mechanism in regulating gene expression in these cancers.
    • Targeting YTHDC1 or condensate formation may offer novel therapeutic strategies for myeloid leukemia.

    Related Concept Videos

    RNA Stability01:53

    RNA Stability

    Intact DNA strands can be found in fossils, while scientists sometimes struggle to keep RNA intact under laboratory conditions. The structural variations between RNA and DNA underlie the differences in their stability and longevity. Because DNA is double-stranded, it is inherently more stable. The single-stranded structure of RNA is less stable but also more flexible and can form weak internal bonds. Additionally, most RNAs in the cell are relatively short, while DNA can be up to 250 million...
    34.3K
    mRNA Stability and Gene Expression02:51

    mRNA Stability and Gene Expression

    The structure and stability of mRNA molecules regulates gene expression, as mRNAs are a key step in the pathway from gene to protein. In eukaryotes, the half-life of mRNA varies from a few minutes up to several days. mRNA stability is essential in growth and development. The absence of the proteins regulating its stability, such as tristetraprolin in mice, can cause systemic issues, including bone marrow overgrowth, inflammation, and autoimmunity.
    Cis-acting Elements involved in mRNA stability
    5.9K
    mRNA Stability and Gene Expression02:51

    mRNA Stability and Gene Expression

    3.1K
    Nonsense-mediated mRNA Decay02:27

    Nonsense-mediated mRNA Decay

    The Upf proteins that carry out nonsense-mediated decay (NMD) are found in all eukaryotic organisms, including humans. Each protein has an individual role, but they need to work in collaboration. Upf1 is an ATP-dependent RNA helicase that unwinds the RNA helix. Because Upf1 can unwind any RNA, Upf2 and Upf3 are required to help Upf1 discriminate between nonsense and normal mRNAs.
    Usually, Upf3 binds to an Exon Junction Complex (EJC) at mRNA splice sites. If a ribosome fully translates the mRNA,...
    11.1K
    Nonsense-mediated mRNA Decay02:27

    Nonsense-mediated mRNA Decay

    3.0K
    Nuclear Export of mRNA02:31

    Nuclear Export of mRNA

    Before mRNAs are exported to the cytoplasm, it is crucial to check each mRNA for structural and functional integrity. Eukaryotic cells use several different mechanisms, collectively known as mRNA surveillance, to look for irregularities in mRNAs. Irregular or aberrant mRNA are rapidly degraded by various enzymes. If a defective mRNA escapes the surveillance, it would be translated into a protein which would either be non-functional or not function properly. One of the primary irregularities in...
    8.0K