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Related Concept Videos

Translation01:31

Translation

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Lesson: Translation
Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
Translation Produces the Building Blocks of...
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Excitatory and Inhibitory Effects of Neurotransmitters01:29

Excitatory and Inhibitory Effects of Neurotransmitters

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When an action potential reaches the presynaptic axon terminal, it releases neurotransmitters from the neuron into the synaptic cleft at a chemical synapse. The released neurotransmitter can be excitatory or inhibitory. The critical criteria commonly used to determine whether a molecule is a neurotransmitter at a chemical synapse are the molecule's presence in the presynaptic neuron. Second, its release is in response to strong presynaptic depolarization. And lastly, the presence of...
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Translation01:31

Translation

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Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
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Proteins are...
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Psychosis: Pathophysiology of Schizophrenia and Other Psychotic Disorders01:27

Psychosis: Pathophysiology of Schizophrenia and Other Psychotic Disorders

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Schizophrenia is a neurodevelopmental disorder whose origins are rooted in complex genetic components. Despite our burgeoning understanding, the pathophysiology of this disorder remains incompletely deciphered.
Researchers have identified genetic factors that increase susceptibility to schizophrenia, underscoring the intricate interplay between genetics and environment in disease development. At the core of schizophrenia's pathophysiology is excessive dopaminergic neurotransmission within...
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Human Genetics01:28

Human Genetics

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Human genetics provides a profound framework for understanding the interplay between genetic predispositions and human psychology. At the heart of this discipline lies the study of how genes influence physical traits, behaviors, and susceptibility to diseases. Each person carries a unique genetic code that subtly or significantly shapes their psychological and behavioral landscape.
The complex relationship between genetics and psychology is observable through common biological components such...
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Autism Spectrum Disorder01:19

Autism Spectrum Disorder

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Autism spectrum disorder (ASD) is a neurodevelopmental condition marked by persistent deficits in social communication and interaction alongside restrictive and repetitive behaviors or interests. ASD is sometimes accompanied by intellectual impairment.
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Related Experiment Video

Updated: May 1, 2026

Studying Protein Function and the Role of Altered Protein Expression by Antibody Interference and Three-dimensional Reconstructions
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Exaggerated translation causes synaptic and behavioural aberrations associated with autism.

Emanuela Santini1, Thu N Huynh, Andrew F MacAskill

  • 1Center for Neural Science, New York University, New York, New York 10003, USA.

Nature
|December 25, 2012
PubMed
Summary

Altered protein synthesis due to increased eukaryotic translation initiation factor 4E (eIF4E) causes autism-like behaviors in mice. Inhibiting this process reversed the symptoms, suggesting a causal link.

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Area of Science:

  • Neuroscience
  • Genetics
  • Molecular Biology

Background:

  • Autism spectrum disorders (ASDs) are complex neurodevelopmental conditions characterized by social, communication, and behavioral deficits.
  • Altered translational control and exaggerated protein synthesis are hypothesized mechanisms underlying ASDs.
  • Genetic links to chromosome 4q, including the EIF4E gene, have been observed in individuals with autism.

Purpose of the Study:

  • To investigate the causal role of eukaryotic translation initiation factor 4E (eIF4E) in the development of autism-like behaviors.
  • To explore the impact of increased eIF4E levels on protein synthesis, synaptic function, and behavior in a mouse model.

Main Methods:

  • Genetically engineered mice with increased levels of eIF4E.
  • Behavioral assessments to identify autism-related deficits (social interaction, repetitive behaviors).
  • Electrophysiological and biochemical analyses of synaptic function in key brain regions.
  • Pharmacological intervention using a cap-dependent translation inhibitor (4EGI-1).

Main Results:

  • Mice with elevated eIF4E exhibited exaggerated cap-dependent translation and displayed autistic-like behaviors, including repetitive actions and social deficits.
  • These behavioral changes were associated with synaptic dysfunction in the medial prefrontal cortex, striatum, and hippocampus.
  • Intracerebroventricular administration of the translation inhibitor 4EGI-1 ameliorated the autistic-like behaviors.

Conclusions:

  • Exaggerated cap-dependent translation driven by increased eIF4E levels is a potential molecular mechanism contributing to ASDs.
  • This molecular alteration leads to synaptic dysfunction and characteristic autistic behaviors.
  • Targeting cap-dependent translation offers a potential therapeutic strategy for autism spectrum disorders.