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Levels of cerebrospinal fluid nerve-growth factor differ in infantile autism and Rett syndrome
1Department of Child Neurology, Children's Hospital, University of Kuopio, Finland. Raili.Riikonen@uku.fi
Insights
Cerebrospinal fluid (CSF) nerve growth factor (NGF) levels may help differentiate autism from Rett syndrome (RS). Children with autism typically have normal CSF NGF, while those with RS show low to negligible levels, aiding diagnosis.
Area of Science:
- Neuroscience
- Developmental Biology
- Biochemistry
Background:
- Autism and Rett syndrome (RS) are complex developmental disorders with unknown etiologies.
- Differentiating early infantile autism from RS is challenging due to overlapping symptoms and lack of definitive biomarkers.
- Both conditions require accurate diagnostic tools for timely intervention and management.
Purpose of the Study:
- To investigate and compare cerebrospinal fluid (CSF) nerve growth factor (NGF) levels in children diagnosed with infantile autism versus Rett syndrome.
- To explore the potential of CSF NGF as a biochemical marker for distinguishing between autism and RS.
- To correlate CSF NGF levels with known neurodevelopmental and neurochemical differences between the two syndromes.
Main Methods:
- Enzyme-linked immunosorbent assay (ELISA) was employed to quantify CSF NGF levels.
- CSF samples were collected from cohorts of children diagnosed with infantile autism and Rett syndrome.
- Statistical analysis was performed to compare NGF levels between the two groups.
Main Results:
- Children with infantile autism exhibited predominantly normal CSF NGF levels.
- Children with Rett syndrome displayed significantly low to negligible CSF NGF levels.
- These findings align with established differences in brain morphology and neurochemistry between autism and RS.
Conclusions:
- Cerebrospinal fluid (CSF) nerve growth factor (NGF) levels can serve as a potential biochemical marker for differentiating autism from Rett syndrome.
- The distinct CSF NGF profiles observed suggest underlying neurobiological differences between the two developmental disorders.
- This research highlights a promising avenue for improving diagnostic accuracy in early developmental disorders.
Abstract:
Autism and Rett syndrome (RS) are both developmental disorders of unknown origin. Autism is a behaviourally defined syndrome. RS, which affects girls only, is characterized by a profound learning disability following early normal development, with a consistent cluster of clinical features. Differentiation of RS from infantile autism in the very early stages of the disorders is not always easy. Both syndromes still lack discriminative laboratory markers for accurate diagnosis and differentiation. We decided to compare the CSF nerve-growth factor (NGF) levels of children with infantile autism and children with RS using enzyme-linked immunosorbent assay (ELISA). Our findings of mainly normal CSF NGF in autism and low to negligible values in RS are in agreement with the different morphological and neurochemical findings (brain growth, affected brain areas, neurotransmitter metabolism) in the two syndromes. CSF NGF could be used as a biochemical marker for differentiation of patients with autism from those with RS.