"These findings suggest that interactions between MAdCAM-1 and alpha4beta7 integrin and/or unsulfated sLeX and L-selectin may become a dominant mechanism for inflammatory cell recruitment in the absence of 6-sulfo sLeX and contribute to more severe colitis phenotypes seen in mice deficient in both GlcNAc6ST-1 and GlcNAc6ST-2."xsd:string