ASC - Autism Study

The ASC - Autism Pilot Study will be performed at the Child and Adolescent Psychiatry, Aalborg University Hospital, Denmark. 10 children aged 6-14 years with ASD and gastrointestinal symptoms will be enrolled through the Child and Adolescent Psychiatry, Psychiatry Clinic South, Aalborg University Hospital, Denmark.

The participants will randomly be divied into two treatment groups:

• participant 1-5 will be treated with 1 x 1000000 C2C_ASCs/kg body weight
• participant 6-10 will be treated with 2 x 1000000 C2C_ASCs/kg body weight

C2C_ASC treatment:

The C2C_ASCs product will be diluted in 50 ml isotonic saline and infused in an arm vein within 15 min. In both groups there will for each participant be a week observation for SAE's related to the cell treatment before the next participant will be treated, if no SAE's have been detected.

The investigators hypothesize that the connection between gastrointestinal symptoms/leaky gut syndrome, increase local gastrointestinal and systemic elevated immunological and inflammatory activity, bacterial toxins in the blood and symptoms of ASD in children with symptoms of leaky gut syndrome can be reduced or normalized by modulating the immunological activity and inflammation by treatment with mesenchymal stromal cells.

Inclusion criteria

• Diagnosis of autism spectrum disorder.
• Ongoing gastrointestinal symptoms or previous gastrointestinal symptoms which disappeared or were reduced after dietary changes.
• Age 6 to 14 years.

Exclusion criteria

• Known genetic syndrome or pathogenic mutation or copy number variation associated with autism spectrum disorder.
• Known CNS-infection (now or previously) and/or HIV positivity.
• Primary immunodeficiency disorder or autoimmune cytopenia.
• Current treatment with cytotoxic drugs or systemic administered glucocorticoids and/or immunosuppressive therapy or other antiinflammatory medication (except nonsteroidal anti-inflammatory drugs).
• Epilepsy or known seizure disorder (now or previously).