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Alterations of prolyl endopeptidase activity in the plasma of children with autistic spectrum disorders

Momeni, N. and Nordström, B.M. and Horstmann, V. and Avarsaji, H. and Sivberg, B.V. (2005) Alterations of prolyl endopeptidase activity in the plasma of children with autistic spectrum disorders. BMC Psychiatry, 5.

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Background: Prolyl Endopeptidase (PEP, EC, a cytosolic endopeptidase, hydrolyses peptide bonds on the carboxyl side of proline residue in proteins with a relatively small molecular weight. It has been shown that altered PEP activity is associated with various psychological diseases such as schizophrenia, mania and depression. Autistic Spectrum Disorders (ASD) are neuropsychiatric and behavioural syndromes affecting social behaviours and communication development. They are classified as developmental disorders. The aim of this study was to examine the hypothesis that PEP activity is also associated with ASDs. Methods: Fluorometric assay was used to measure PEP activity in EDTA plasma in children with ASD (n =18) aged 4-12 years (mean ± SD: 7.9 ± 2.5). These results were then compared to PEP activity in a control group of non-ASD children (n = 15) aged 2-10 years (mean ± SD: 6.4 ± 2.2). Results: An alteration in PEP activity was found in the children with ASD compared to the control group. There was much greater variation of PEP activity in the group of ASD children when compared to the controls (SD= 39.9 and SD 9.6, respectively). This variation was significant (p<0.0005), although the mean level of PEP activity in the group of ASD children was slightly higher than in the control group (124.4 and 134.1, respectively). Conclusions: Our preliminary finding suggests a role for PEP enzyme in the pathophysiology of autism but further research should be conducted to establish its role in the aetiology of psychiatric and neurological disorders, including autism and related spectrum disorders. © 2005 Momeni et al., licensee BioMed Central Ltd.

Item Type: Article
Additional Information: cited By 18
Uncontrolled Keywords: edetic acid; prolyl endopeptidase; prolyl endopeptidase; serine proteinase, article; autism; child; childhood disease; clinical article; controlled study; disease association; enzyme activity; enzyme assay; female; fluorometry; human; male; medical research; mental disease; neurologic disease; pathophysiology; protein blood level; statistical significance; autism; blood; comparative study; enzymology; metabolism; physiology; preschool child, Autistic Disorder; Child; Child, Preschool; Fluorometry; Humans; Serine Endopeptidases
Subjects: مقالات نمایه شده محققین دانشگاه در سایت ,Web of Science ,Scopus
Depositing User: GOUMS
Date Deposited: 22 Jul 2017 07:38
Last Modified: 22 Jul 2017 07:38
URI: http://eprints.goums.ac.ir/id/eprint/9285

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