Burden of Mendelian disorders in a large Middle Eastern biobank.

Arab population Biobank Consanguinity Genome sequencing Mendelian disorders Middle East Pathogenic variants Qatar Rare genetic disease

Journal

Genome medicine
ISSN: 1756-994X
Titre abrégé: Genome Med
Pays: England
ID NLM: 101475844

Informations de publication

Date de publication:
08 Apr 2024
Historique:
received: 01 07 2023
accepted: 19 02 2024
medline: 8 4 2024
pubmed: 8 4 2024
entrez: 7 4 2024
Statut: epublish

Résumé

Genome sequencing of large biobanks from under-represented ancestries provides a valuable resource for the interrogation of Mendelian disease burden at world population level, complementing small-scale familial studies. Here, we interrogate 6045 whole genomes from Qatar-a Middle Eastern population with high consanguinity and understudied mutational burden-enrolled at the national Biobank and phenotyped for 58 clinically-relevant quantitative traits. We examine a curated set of 2648 Mendelian genes from 20 panels, annotating known and novel pathogenic variants and assessing their penetrance and impact on the measured traits. We find that 62.5% of participants are carriers of at least 1 known pathogenic variant relating to recessive conditions, with homozygosity observed in 1 in 150 subjects (0.6%) for which Peninsular Arabs are particularly enriched versus other ancestries (5.8-fold). On average, 52.3 loss-of-function variants were found per genome, 6.5 of which affect a known Mendelian gene. Several variants annotated in ClinVar/HGMD as pathogenic appeared at intermediate frequencies in this cohort (1-3%), highlighting Arab founder effect, while others have exceedingly high frequencies (> 5%) prompting reconsideration as benign. Furthermore, cumulative gene burden analysis revealed 56 genes having gene carrier frequency > 1/50, including 5 ACMG Tier 3 panel genes which would be candidates for adding to newborn screening in the country. Additionally, leveraging 58 biobank traits, we systematically assess the impact of novel/rare variants on phenotypes and discover 39 candidate large-effect variants associating with extreme quantitative traits. Furthermore, through rare variant burden testing, we discover 13 genes with high mutational load, including 5 with impact on traits relevant to disease conditions, including metabolic disorder and type 2 diabetes, consistent with the high prevalence of these conditions in the region. This study on the first phase of the growing Qatar Genome Program cohort provides a comprehensive resource from a Middle Eastern population to understand the global mutational burden in Mendelian genes and their impact on traits in seemingly healthy individuals in high consanguinity settings.

Sections du résumé

BACKGROUND BACKGROUND
Genome sequencing of large biobanks from under-represented ancestries provides a valuable resource for the interrogation of Mendelian disease burden at world population level, complementing small-scale familial studies.
METHODS METHODS
Here, we interrogate 6045 whole genomes from Qatar-a Middle Eastern population with high consanguinity and understudied mutational burden-enrolled at the national Biobank and phenotyped for 58 clinically-relevant quantitative traits. We examine a curated set of 2648 Mendelian genes from 20 panels, annotating known and novel pathogenic variants and assessing their penetrance and impact on the measured traits.
RESULTS RESULTS
We find that 62.5% of participants are carriers of at least 1 known pathogenic variant relating to recessive conditions, with homozygosity observed in 1 in 150 subjects (0.6%) for which Peninsular Arabs are particularly enriched versus other ancestries (5.8-fold). On average, 52.3 loss-of-function variants were found per genome, 6.5 of which affect a known Mendelian gene. Several variants annotated in ClinVar/HGMD as pathogenic appeared at intermediate frequencies in this cohort (1-3%), highlighting Arab founder effect, while others have exceedingly high frequencies (> 5%) prompting reconsideration as benign. Furthermore, cumulative gene burden analysis revealed 56 genes having gene carrier frequency > 1/50, including 5 ACMG Tier 3 panel genes which would be candidates for adding to newborn screening in the country. Additionally, leveraging 58 biobank traits, we systematically assess the impact of novel/rare variants on phenotypes and discover 39 candidate large-effect variants associating with extreme quantitative traits. Furthermore, through rare variant burden testing, we discover 13 genes with high mutational load, including 5 with impact on traits relevant to disease conditions, including metabolic disorder and type 2 diabetes, consistent with the high prevalence of these conditions in the region.
CONCLUSIONS CONCLUSIONS
This study on the first phase of the growing Qatar Genome Program cohort provides a comprehensive resource from a Middle Eastern population to understand the global mutational burden in Mendelian genes and their impact on traits in seemingly healthy individuals in high consanguinity settings.

Identifiants

pubmed: 38584274
doi: 10.1186/s13073-024-01307-6
pii: 10.1186/s13073-024-01307-6
doi:

Types de publication

Journal Article

Langues

eng

Sous-ensembles de citation

IM

Pagination

46

Subventions

Organisme : Qatar National Research Fund
ID : QF-QBB-RES-PUB-003

Investigateurs

Said I Ismail (SI)
Wadha Al-Muftah (W)
Radja Badji (R)
Hamdi Mbarek (H)
Dima Darwish (D)
Tasnim Fadl (T)
Heba Yasin (H)
Maryem Ennaifar (M)
Rania Abdellatif (R)
Fatima Alkuwari (F)
Muhammad Alvi (M)
Yasser Al-Sarraj (Y)
Chadi Saad (C)
Asmaa Althani (A)
Eleni Fethnou (E)
Fatima Qafoud (F)
Eiman Alkhayat (E)
Nahla Afifi (N)
Sara Tomei (S)
Wei Liu (W)
Kun Wang (K)
Stephan Lorenz (S)
Hakeem Almabrazi (H)
Fazulur Rehaman Vempalli (FR)
Ramzi Temanni (R)
Tariq Abu Saqri (TA)
Mohammedhusen Khatib (M)
Mehshad Hamza (M)
Tariq Abu Zaid (TA)
Ahmed El Khouly (AE)
Tushar Pathare (T)
Shafeeq Poolat (S)
Rashid Al-Ali (R)
Omar Albagha (O)
Souhaila Al-Khodor (S)
Mashael Alshafai (M)
Lotfi Chouchane (L)
Xavier Estivill (X)
Hamdi Mbarek (H)
Jithesh V Puthen (JV)
Karsten Suhre (K)
Zohreh Tatari (Z)

Informations de copyright

© 2024. The Author(s).

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Auteurs

Waleed Aamer (W)

Department of Human Genetics, Sidra Medicine, Doha, Qatar.

Aljazi Al-Maraghi (A)

Department of Human Genetics, Sidra Medicine, Doha, Qatar.

Najeeb Syed (N)

Applied Bioinformatics Core, Sidra Medicine, Doha, Qatar.

Geethanjali Devadoss Gandhi (GD)

Department of Human Genetics, Sidra Medicine, Doha, Qatar.

Elbay Aliyev (E)

Department of Human Genetics, Sidra Medicine, Doha, Qatar.

Alya A Al-Kurbi (AA)

Department of Human Genetics, Sidra Medicine, Doha, Qatar.

Omayma Al-Saei (O)

Department of Human Genetics, Sidra Medicine, Doha, Qatar.

Muhammad Kohailan (M)

Department of Human Genetics, Sidra Medicine, Doha, Qatar.

Navaneethakrishnan Krishnamoorthy (N)

Department of Human Genetics, Sidra Medicine, Doha, Qatar.

Sasirekha Palaniswamy (S)

Department of Human Genetics, Sidra Medicine, Doha, Qatar.

Khulod Al-Malki (K)

Department of Human Genetics, Sidra Medicine, Doha, Qatar.

Saleha Abbasi (S)

Department of Human Genetics, Sidra Medicine, Doha, Qatar.

Nourhen Agrebi (N)

Department of Human Genetics, Sidra Medicine, Doha, Qatar.

Fatemeh Abbaszadeh (F)

Diagnostic Genomic Division, Hamad Medical Corporation, Doha, Qatar.

Ammira S Al-Shabeeb Akil (ASA)

Department of Human Genetics, Sidra Medicine, Doha, Qatar.

Ramin Badii (R)

Diagnostic Genomic Division, Hamad Medical Corporation, Doha, Qatar.

Tawfeg Ben-Omran (T)

Section of Clinical and Metabolic Genetics, Department of pediatrics, Hamad Medical Corporation, Doha, Qatar.
Department of Pediatric, Weill Cornell Medical College, Doha, Qatar.
Division of Genetic & Genomics Medicine, Sidra Medicine, Doha, Qatar.

Bernice Lo (B)

Department of Human Genetics, Sidra Medicine, Doha, Qatar.
College of Health and Life Sciences, Hamad Bin Khalifa University, Doha, Qatar.

Younes Mokrab (Y)

Department of Human Genetics, Sidra Medicine, Doha, Qatar. ymokrab@sidra.org.
Department of Genetic Medicine, Weill Cornell Medicine-Qatar, Doha, Qatar. ymokrab@sidra.org.
College of Health Sciences, Qatar University, Doha, Qatar. ymokrab@sidra.org.

Khalid A Fakhro (KA)

Department of Human Genetics, Sidra Medicine, Doha, Qatar. kfakhro@sidra.org.
College of Health and Life Sciences, Hamad Bin Khalifa University, Doha, Qatar. kfakhro@sidra.org.
Department of Genetic Medicine, Weill Cornell Medicine-Qatar, Doha, Qatar. kfakhro@sidra.org.

Classifications MeSH