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ABSTRACT: HLA-DQB1*02:03 extension

PROVIDER: PRJNA614960 | ENA |

REPOSITORIES: ENA

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Dataset's files

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			Action	DRS
	SRR11405980_1.fastq.gz	Fastqsanger.gz
	SRR11405980_2.fastq.gz	Fastqsanger.gz
	SRR11405981_1.fastq.gz	Fastqsanger.gz
	SRR11405981_2.fastq.gz	Fastqsanger.gz
	SRR11405982_1.fastq.gz	Fastqsanger.gz

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Project description:The Human leukocyte antigen (HLA) -region, especially HLA class I and II genes, plays a major role in the predisposition to autoimmune disorders. Particularly three HLA haplotypes, DRB1*03-DQA1*05-DQB1*02 (DR3-DQ2), DRB1*04:01-DQA1*03-DQB1*03:02 (DR4-DQ8) and DRB1*15-DQA1*01-DQB1*06:02 (DR2-DQ6), have an important role in many autoimmune diseases: for example, in type 1 diabetes (T1D) the DR2-DQ6 is associated with a strongly decreased T1D risk and the DR3-DQ2 and DR4-DQ8 are associated with a moderately increased T1D risk. To clarify the mechanisms behind this association, we examined genome-wide DNA methylation in CD4+ T cells and CD19+ B cells of healthy subjects homozygous either for DR3-DQ2 (n = 19), DR4-DQ8 (n = 17) or DR2-DQ6 (n = 14), and compared methylation between the genotypes. For the study, CD4+ T cells and CD19+ B cells were isolated consecutively from PBMC samples using magnetic bead separation. DNA was extracted from the cell lysates with AllPrep DNA/RNA/miRNA Universal Kit (Qiagen, Germany). Then the individual DNA samples were pooled into 11 pooled samples with 4–5 samples per pooled sample. The original 50 samples were designated pools based on age and sex to ensure that the age and sex distributions would be as similar as possible between the pooled samples. The mean age (±SD) in the three HLA-groups (DR2-DQ6, DR3-DQ2 and DR4-DQ8) were 15.0 (±8.3), 11.1 (±5.6) and 11.8 (±7.9) and their male to female ratios were 8/6, 9/10 and 11/6. Similar pooled samples were created for both the CD4+ T cell and the CD19+ B cell samples. Then DNA methylation was examined in the pooled CD4+ T cell and CD19+ B cell samples using Illumina Infinium HumanMethylation EPIC beadchip.

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