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antisense

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Pronunciation

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    • /ˈæntaɪˌsɛns/

    Meanings

    Noun

    1. a DNA or RNA sequence complementary to a target sequence and used to block or alter gene expression

    Adjective

    1. relating to or using a complementary nucleic acid sequence, especially to inhibit gene expression

    Beyond the definition

    "Antisense" sounds like it should mean "against sense," and in a way, it does—but the "sense" here is a technical one. In biology, it refers to a DNA or RNA sequence that is complementary (and typically antiparallel) to a "sense" sequence. Because the two match up base for base, an antisense strand or antisense RNA can bind to the corresponding RNA and interfere with what it does.

    In modern medicine and biotechnology, antisense molecules (often short, synthetic pieces of nucleic acid) are designed to pair with messenger RNA (mRNA). That pairing can block translation, trigger RNA breakdown, or even change splicing—reducing or redirecting the production of a protein. Outside science, "antisense" is only occasionally used metaphorically for a deliberate counterpoint that seems designed to negate an original idea, but that figurative use is much rarer than the biological one.

    Examples

    1. 1

      Biology research

      The paper explains how antisense RNA can block the production of a specific protein.

    2. 2

      Drug development

      Researchers are testing an antisense drug for a rare genetic disease.

    3. 3

      Medical treatment

      Unlike standard pain medicine, antisense therapy is designed to target one gene at a time.

    See also

    Similar

    Shades of meaning

    • sequence-complementary

    Contrast

    Used with (collocations)

    • antisense strand
    • antisense oligonucleotide
    • antisense RNA

    Explore

    • RNA interference
    • base pairing

    Forms and spellings

    1 form open this card.

    Main spelling

    • antisense