MGAT5 and diabetes mellitus: Recently, N-linked glycosylation has been regarded as an important indicator for assessing the endocrine and metabolic status of diabetic patients, and most of the diabetes-associated N-glycoprotein alterations are due to aberrant expression of glycosyltransferase genes, such as N-acetylglucosaminyltransferase V (GnT-V, also known as Mgat5) [13–15].