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The normal distribution of PRNP codon 129 polymorphism in the Moroccan population (Arabs and Casablanca residents)

S Nadifi1, I Slassi, K M El Hachimi

  • 1Genetic and Molecular Pathology Laboratory, Medical School, Hassan II University, Casablanca, Morocco. labgenmed@gmail.com

Pathologie-Biologie
|January 15, 2008
PubMed

Insights

The prion protein gene (PRNP) codon 129 polymorphism influences human prion disease risk. Moroccan population genotype frequencies (MM, MV, VV) were determined, showing intermediate values between European and Asian populations.

Area of Science:

  • Genetics
  • Neuroscience
  • Epidemiology

Background:

  • The prion protein gene (PRNP) codon 129 polymorphism is a known susceptibility factor for human prion diseases.
  • Understanding PRNP codon 129 genotype frequencies in diverse populations is crucial for assessing disease risk.
  • Previous studies have established variations in these frequencies across different ethnic groups.

Purpose of the Study:

  • To investigate the allelic variation of methionine and valine at the PRNP codon 129 polymorphism in the normal Moroccan population.
  • To establish baseline genotype frequencies for PRNP codon 129 in Morocco.
  • To compare these frequencies with those reported in European and Asian populations.

Main Methods:

  • Genotyping of 147 subjects from the normal Moroccan population.
  • Analysis of the PRNP codon 129 polymorphism for methionine (M) and valine (V) alleles.
  • Calculation of genotype frequencies: MM, MV, and VV.

Main Results:

  • The genotype frequencies in the Moroccan population were: Methionine-Methionine (MM) at 57.1%, Methionine-Valine (MV) at 36%, and Valine-Valine (VV) at 6.8%.
  • These frequencies fall between the ranges observed in European and Asian populations.
  • The data provides the first comprehensive report on PRNP codon 129 polymorphism in the Moroccan population.

Conclusions:

  • The PRNP codon 129 genotype distribution in Morocco is distinct and intermediate between European and Asian populations.
  • Further investigation into other polymorphisms, such as codon 219, is necessary for a complete risk assessment of prion diseases in Morocco.
  • These findings contribute to the global understanding of prion disease susceptibility genetics.

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