PTPRD and type 2 diabetes mellitus: The SNPs rs10511544 A>C, rs10756026 T>A and rs10809070 C>G were located in the intron of PTPRD. Interestingly, the variant alleles of the three SNPs were associated with higher expression of PTPRD, according to the GTEx Portal (http://www.gtexportal.org) database, and PTPRD levels were reported to be lower in T2D patients [12], supporting the protective effect of the variant alleles of the three SNPs on GDM occurrence.