Jain Ruchi, Bizzari Sami, Ramaswamy Sathishkumar, Hasham Khaleem F, Sinha Shruti, Chekroun Ikram, Rabea Fatma, Abuijlan Eman, El Naofal Maha, Hassani Massomeh Sheikh, Shenbagam Shruti, Taylor Alan, Uddin Mohammed, Almarri Mohamed, Alkhnbashi Omer, Khansaheb Hamda, Al Suwaidi Hanan, Du Plessis Stefan S, El-Hayek Stephany, Alsheikh-Ali Alawi, Abou Tayoun Ahmad
Dubai Health Genomic Medicine Center, Dubai Health, Dubai, United Arab Emirates.
Centre for Arab Genomic Studies, Hamdan Bin Rashid Al Maktoum Foundation for Medical and Educational Sciences, Dubai, United Arab Emirates.
Genet Med Open. 2025 Jul 19;3:103446. doi: 10.1016/j.gimo.2025.103446. eCollection 2025.
PURPOSE: Genetic variation underlying rare diseases in Arab populations is poorly understood limiting effective carrier screening for recessive disorders, which are prevalent because of high consanguineous rates. METHODS: Using the American College of Medical Genetics and Genomics/Association for Molecular Pathology guidelines, we curated pathogenic (P) and likely pathogenic (LP) variants in 1333 Arab Emirati families (346 internal cohort and 987 from the literature). We also analyzed P/LP variants in 1194 Emirati exomes, calculated allele frequencies, and estimated carrier rates for the associated recessive conditions. RESULTS: Among the 1333 families, 1060 had 701 variants meeting the American College of Medical Genetics and Genomics/Association for Molecular Pathology criteria for pathogenicity, with 52% and 30% being absent from the Genome Aggregation Database and ClinVar databases, respectively. Independently, we determined the frequency of P/LP variants in 1194 Emirati exomes, as well as cumulative gene-disease carrier rates. The gene (HGNC:2600) showed the highest carrier rate (10.6%) followed by (HGNC:4827) (9.6%), (HGNC:6998) (5.9%), and (HGNC:34) (4.3%). Using a provisional gene list for carrier screening, based on our analysis, we estimated an at-risk couples rate of 4% to 21%, which varies across different screening panels recommended in other populations. CONCLUSION: Our findings emphasize the necessity of identifying prevalent diseases in underrepresented populations to develop effective and equitable preventive public health measures, including premarital screening programs.
Eur J Pediatr. 2025-8-29
1993
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