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m6A facilitates hippocampus-dependent learning and memory through YTHDF1
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m6A facilitates hippocampus-dependent learning and memory through YTHDF1
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m6A facilitates hippocampus-dependent learning and memory through YTHDF1
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Journal Article
m6A facilitates hippocampus-dependent learning and memory through YTHDF1
2018
Overview
N
6
-methyladenosine (m
6
A), the most prevalent internal RNA modification on mammalian messenger RNAs, regulates the fates and functions of modified transcripts through m
6
A-specific binding proteins
1
–
5
. In the nervous system, m
6
A is abundant and modulates various neural functions
6
–
11
. Whereas m
6
A marks groups of mRNAs for coordinated degradation in various physiological processes
12
–
15
, the relevance of m
6
A for mRNA translation in vivo remains largely unknown. Here we show that, through its binding protein YTHDF1, m
6
A promotes protein translation of target transcripts in response to neuronal stimuli in the adult mouse hippocampus, thereby facilitating learning and memory. Mice with genetic deletion of
Ythdf1
show learning and memory defects as well as impaired hippocampal synaptic transmission and long-term potentiation. Re-expression of YTHDF1 in the hippocampus of adult
Ythdf1
-knockout mice rescues the behavioural and synaptic defects, whereas hippocampus-specific acute knockdown of
Ythdf1
or
Mettl3
, which encodes the catalytic component of the m
6
A methyltransferase complex, recapitulates the hippocampal deficiency. Transcriptome-wide mapping of YTHDF1-binding sites and m
6
A sites on hippocampal mRNAs identified key neuronal genes. Nascent protein labelling and tether reporter assays in hippocampal neurons showed that YTHDF1 enhances protein synthesis in a neuronal-stimulus-dependent manner. In summary, YTHDF1 facilitates translation of m
6
A-methylated neuronal mRNAs in response to neuronal stimulation, and this process contributes to learning and memory.
Neuronal stimulation induces protein translation of m
6
A-methylated neuronal mRNAs facilitated by YTHDF1, and this process contributes to learning and memory.
