We identified four T1D risk loci reaching genome-wide significance in the Chinese Han population, including two novel loci, rs4320356 near <i>BTN3A1</i> (odds ratio [OR] 1.26, <i>P</i> = 2.70 × 10<sup>-8</sup>) and rs3802604 in <i>GATA3</i> (OR 1.24, <i>P</i> = 2.06 × 10<sup>-8</sup>), and two previously reported loci, rs1770 in MHC (OR 4.28, <i>P</i> = 2.25 × 10<sup>-232</sup>) and rs705699 in <i>SUOX</i> (OR 1.46, <i>P</i> = 7.48 × 10<sup>-20</sup>).
We identified four T1D risk loci reaching genome-wide significance in the Chinese Han population, including two novel loci, rs4320356 near <i>BTN3A1</i> (odds ratio [OR] 1.26, <i>P</i> = 2.70 × 10<sup>-8</sup>) and rs3802604 in <i>GATA3</i> (OR 1.24, <i>P</i> = 2.06 × 10<sup>-8</sup>), and two previously reported loci, rs1770 in MHC (OR 4.28, <i>P</i> = 2.25 × 10<sup>-232</sup>) and rs705699 in <i>SUOX</i> (OR 1.46, <i>P</i> = 7.48 × 10<sup>-20</sup>).
Studies on IDDM5 have led to the discovery of a novel polymorphism 163 A-->G (M55V) in SUMO4 gene, which was found to be associated with T1D patients with Asian origin.
It was also shown that there is an association between T668C mutation and low HLA related risk of IDDM development, the highest frequency of F206L mutation in the EGF domain of L-selectin was observed in relatives with 'protective' HLA DQB1*0602 allele and nonDRB1*03-nonDRB1*04 haplotype, while in subjects with highest risk of IDDM haplotype the frequency of T668C mutation was similar to the controls.