Publications by authors named "Mohammed Chaoui El Faiz"

2 Publications

  • Page 1 of 1

Amplification and Mutations in Glioblastoma Patients of the Northeast of Morocco.

Biomed Res Int 2017 13;2017:8045859. Epub 2017 Jul 13.

Pathological Anatomy and Molecular Pathology Service, University Hospital Hassan II of Fez, Fez, Morocco.

Glioblastomas are the most frequent and aggressive primary brain tumors which are expressing various evolutions, aggressiveness, and prognosis. Thus, the 2007 World Health Organization classification based solely on the histological criteria is no longer sufficient. It should be complemented by molecular analysis for a true histomolecular classification. The new 2016 WHO classification of tumors of the central nervous system uses molecular parameters in addition to histology to reclassify these tumors and reduce the interobserver variability. The aim of this study is to determine the prevalence of mutations and amplifications in the population of the northeast region of Morocco and then to compare the results with other studies. . codon 132 and codon 172 were directly sequenced and the amplification of exon 20 of gene was investigated by qPCR in 65 glioblastoma tumors diagnosed at the University Hospital of Fez between 2010 and 2014. . The R132H mutation was observed in 8 of 65 tumor samples (12.31%). No mutation of was detected. amplification was identified in 17 cases (26.15%). . A systematic search of both histological and molecular markers should be requisite for a good diagnosis and a better management of glioblastomas.
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April 2018

Prevalence of IDH1/2 Mutations in Different Subtypes of Glioma in the North-East Population of Morocco.

Asian Pac J Cancer Prev 2016 ;17(5):2649-53

Groupe Hospitalier Pitie-Salpetriere, Laboratoire de Neuropathologie R Escourolle, Paris, France E-mail :

Background: Genetic alterations in gliomas have increasing importance for classification purposes. Thus, we are especially interested in studying IDH mutations which may feature potential roles in diagnosis, prognosis and response to treatment. Our aim was to investigate IDH mutations in diffuse glioma patients diagnosed in university hospital centre of Fez in Morocco.

Materials And Methods: IDH1 codon 132 and IDH2 codon 172 were direct-sequenced in 117 diffuse glioma samples diagnosed and treated in University Hospital Hassan II between 2010 and 2014.

Results: The R132H IDH1 mutation was identified in 43/117 tumor samples and R172K IDH2 mutation was detected in only one anaplastic oligodendroglioma. IDH mutations were observed in 63.2% of astrocytomas, 73.3% of diffuse oligodendrogliomas and 12.90% of glioblastomas.

Conclusions: Our results confirmed other studies published earlier for other populations with some small discrepancies.
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February 2017