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Cerebrospinal fluid insulin-like growth factors IGF-1 and IGF-2 in infantile autism

Raili Riikonen1, Ismo Makkonen, Raija Vanhala

  • 1Department of Child Neurology, Kuopio University Central Hospital, Kuopio, Finland. raili.riikonen@kolumbus.fi

Developmental Medicine and Child Neurology
|August 15, 2006
PubMed

Insights

Low cerebrospinal fluid insulin-like growth factor-1 (IGF-1) in children with autism may indicate early pathogenesis. This finding suggests IGF-1

Area of Science:

  • Neuroscience
  • Developmental Biology
  • Biochemistry

Background:

  • Cerebral development in autism spectrum disorder (ASD) lacks comprehensive study of key biological regulators.
  • Insulin-like growth factors (IGFs) play crucial roles in neural development and cell survival.

Purpose of the Study:

  • To investigate concentrations of insulin-like growth factors (IGF-1 and IGF-2) in cerebrospinal fluid (CSF) of children with autism.
  • To explore the relationship between CSF IGF levels, age, and head size in children with and without autism.

Main Methods:

  • Radioimmunoassay was used to measure IGF-1 and IGF-2 levels in CSF samples from 25 children with autism and 16 age-matched controls.
  • Statistical analyses were performed to compare IGF concentrations between groups and correlate them with age and head circumference.

Main Results:

  • Children with autism exhibited significantly lower CSF IGF-1 concentrations compared to the control group, particularly those under 5 years old.
  • CSF IGF-1 levels correlated with head circumference in children with autism, but not in controls.
  • No significant difference in CSF IGF-2 concentrations was observed between the two groups.

Conclusions:

  • Reduced early-life CSF IGF-1 may be associated with the pathogenesis of autism, potentially impacting cerebellar Purkinje cell survival.
  • IGF-1 and IGF-2 may influence head growth in children with autism, as reflected by CSF concentrations.

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