GPX1 and inflammatory bowel disease: Among the already published GWAS studies in IBD the only reference found related to these two genes is for GPX1 that has been suggested [32] to be in linkage disequilibrium with macrophage stimulating protein-1 (MST1); the authors propose that SNP rs1050450 (c.596C>T) in GPX1 is the pathophysiologic link between IBD12 locus and IBD, rather than the macrophage stimulating protein-1 (MST1), as previously described.