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Factors Influencing Verbal Intelligence and Spoken Language in Children with Phenylketonuria

Zahra Soleymani1, Nasrin Keramati, Farzaneh Rohani

  • 1Departments of *Speech therapy and Physiotherapy, School of Rehabilitation, Tehran University of Medical Sciences; and Department of Pediatrics, Institute of Endocrinology and Metabolism, Iran University of Medical Sciences; Tehran, Iran. Correspondence to: Dr Zahra Soleymani, Department of Speech Therapy, School of Rehabilitation, Tehran University of Medical Sciences, Enghelab Avenue, Pitch-e-shemiran, Tehran 11489, Iran. Soleymaniz@sina.tums.ac.ir.

Indian Pediatrics
|June 11, 2015
PubMed

Insights

Early diagnosis and phenylalanine control in phenylketonuria (PKU) significantly improve children's verbal intelligence and spoken language skills. Timely treatment is crucial for better cognitive and linguistic outcomes in PKU patients.

Area of Science:

  • Neuroscience
  • Pediatric Medicine
  • Genetics

Background:

  • Phenylketonuria (PKU) is a genetic disorder requiring early intervention.
  • Cognitive and language development can be affected in children with PKU.
  • The impact of diagnosis age and phenylalanine levels on these abilities requires further investigation.

Purpose of the Study:

  • To assess verbal intelligence and spoken language in children with PKU.
  • To examine the influence of age at diagnosis and phenylalanine levels on these skills.
  • To compare PKU patients with typically developing children.

Main Methods:

  • Cross-sectional study involving 30 children with PKU and 42 controls (aged 4-6.5 years).
  • Utilized Wechsler Preschool and Primary Scale of Intelligence and Test of Language Development-Primary, third edition.
  • Compared outcomes based on age at diagnosis/treatment and phenylalanine levels.

Main Results:

  • Control subjects outperformed early-treated PKU subjects in verbal intelligence and language skills.
  • Early-treated PKU subjects showed better spoken language and verbal intelligence than late-treated groups.
  • Negative correlations observed between phenylalanine levels and verbal intelligence/spoken language in specific PKU subgroups.

Conclusions:

  • Early diagnosis and effective phenylalanine control enhance verbal intelligence and spoken language in children with PKU.
  • Timely intervention is critical for mitigating cognitive and linguistic deficits associated with PKU.
  • Maintaining low phenylalanine levels is essential for optimal neurodevelopment in PKU.
Abstract

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