Rapamycin and Autism – New Treatment possibilities.

Rapamycin reverses impaired social interaction in mouse models of tuberous sclerosis complex.

http://www.ncbi.nlm.nih.gov/pubmed/23250422

Impairment of reciprocal social interaction is a core symptom of autism spectrum disorder.

Genetic disorders frequently accompany autism spectrum disorder, such as tuberous sclerosis complex caused by haploinsufficiency of the TSC1 and TSC2 genes. Accumulating evidence implicates a relationship between autism spectrum disorder and signal transduction that involves tuberous sclerosis complex 1, tuberous sclerosis complex 2 and mammalian target of rapamycin.

Here we show behavioural abnormalities relevant to autism spectrum disorder and their recovery by the mammalian target of rapamycin inhibitor rapamycin in mouse models of tuberous sclerosis complex. In Tsc2(+/-) mice, we find enhanced transcription of multiple genes involved in mammalian target of rapamycin signalling, which is dependent on activated mammalian target of rapamycin signalling with a minimal influence of Akt.

The findings indicate a crucial role of mammalian target of rapamycin signalling in deficient social behaviour in mouse models of tuberous sclerosis complex, supporting the notion that mammalian target of rapamycin inhibitors may be useful for the pharmacological treatment of autism spectrum disorder associated with tuberous sclerosis complex and other conditions that result from dysregulated mammalian target of rapamycin signalling.

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Further Readings

https://asdresearchinitiative.wordpress.com/?s=rapamycin

http://vectorblog.org/2012/05/preventing-autism-after-infant-seizures/

We already know that there’s some kind of connection between epilepsy and autism: Children who have seizures as newborns not uncommonly develop autism, and studies indicate that about 40 percent of patients with autism also have epilepsy. New research at Boston Children’s Hospital finds a reason for the link, and suggests a way to break it — using an existing drug that’s already been given safely to children.

In the online journal PLoS ONE, Frances Jensen, MD, in the Department of Neurology and the F.M. Kirby Neurobiology Center at Boston Children’s, and lab members Delia Talos, PhD, Hongyu Sun, MD, PhD, and Xiangping Zhou, MD, PhD, showed in a rat model that early-life seizures not only lead to epilepsy later in life, but also produce autistic-like behaviors.

Drilling deeper, they showed that early seizures hyper-activate a group of signaling molecules collectively known as the mTOR pathway. This increased signaling – above and beyond the normal surge that happens early in life – disrupts the normal balance of connections (synapses) in the rats’ developing brains. The rats go on to develop epilepsy and altered social behavior, and Jensen believes something parallel happens in humans.

But here’s what’s exciting. They did other experiments where they gave the rats the drug rapamycin, which disables the mTOR pathway, before and after seizures. The mice did not show abnormal synapse or circuit development, and were less likely to have seizures later in life. Autistic-like symptoms appeared less often.

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This entry was posted in Autism, co-morbid, epilepsy, Immune System, Inflammation, Neurology, Physiology, Treatment and tagged . Bookmark the permalink.

3 Responses to Rapamycin and Autism – New Treatment possibilities.

  1. epilepsymeandneurology says:

    Reblogged this on epilepsy me and neurology and commented:
    asdresearchinitiative very interesting articles on autism and epilepsy also neurological research.

  2. Mickie Carpenter says:

    what kind of expectations for children with autism non verbal could occur by taking rapamycin

    • I think this article discusses some of the possibilities –

      We discuss possible explanations for her lack of speech. Considered as speech apraxia, her mutism could be either a symptom of her TSC or a component of her autism. Another possibility is that long-lasting electrical status epilepticus during sleep led to her autistic behavior and language arrest. Still another possibility is that a disinhibited mammalian target of rapamycin (mTOR) pathway was at the root of all of her neuropsychiatric symptoms.

      http://www.ncbi.nlm.nih.gov/pubmed/24968009

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