Clinical features, epidemiology, autoantibody status, HLA haplotypes and genetic mechanisms of type 1 diabetes mellitus among children in Qatar

Basma Haris, Ikhlak Ahmed, Najeeb Syed, Hakeem Almabrazi, Saras Saraswathi, Sara Al-Khawaga, Amira Saeed, Shihab Mundekkadan, Idris Mohammed, Sanaa Sharari, Iman Hawari, Noor Hamed, Houda Afyouni, Tasneem Abdel-Karim, Shayma Mohammed, Amel Khalifa, Maryam Al-Maadheed, Mahmoud Zyoud, Ahmed Shamekh, Ahmed ElawwaMohammed Y Karim, Fawziya Al-Khalaf, Zohreh Tatari-Calderone, Goran Petrovski, Khalid Hussain

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

To describe the clinical features, epidemiology, autoantibody status, HLA haplotypes and genetic mechanisms of type 1 diabetes mellitus (T1DM). Patients (0-18 years) with diabetes were recruited. Clinical data was collected, autoantibodies and c-peptide were measured. Whole Genome Sequencing was performed. Genomic data analysis was compared with the known genes linked with T1DM and HLA alleles were studied. 1096 patients had one or more antibody positivity. The incidence of T1DM in 2020 was 38.05 per 100,000 children and prevalence was 249.73. GADA was the most common autoantibody followed by IAA. Variants in GSTCD, SKAP2, SLC9B1, BANK1 were most prevalent. An association of HLA haplotypes DQA1*03:01:01G (OR = 2.46, p value = 0.011) and DQB1*03:02:01G (OR = 2.43, p value = 0.022) was identified. The incidence of T1DM in Qatar is the fourth highest in the world, IA2 autoantibody was the most specific with some patients only having ZnT8 or IA2 autoantibodies thus underlining the necessity of profiling all 4 autoantibodies. The genes associated with T1DM in the Arab population were different from those that are common in the Caucasian population. HLA-DQ was enriched in the Qatari patients suggesting that it can be considered a major risk factor at an early age.

Original languageEnglish
Article number18887
Pages (from-to)18887
JournalScientific Reports
Volume11
Issue number1
DOIs
Publication statusPublished - Dec 2021
Externally publishedYes

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