Abstract:Mir483 is a conserved and highly expressed microRNA in placental mammals, embedded within the Igf2 gene. Here, we uncover the control mechanisms and physiological functions of Mir483 in vivo, by generating constitutive loss-of-function and over-expressing mice. Mir483 expression is imprinted and dependent on the Igf2 promoters and Igf2/H19 imprinting control region. Over-expression of Mir483 causes severe mid-gestation fetal, but not placental, growth restriction, and late lethality. Fetal death is prevented … Show more
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