HP and type 2 diabetes mellitus: IgG glycosylation has also been investigated in T2D and DN (Liu et al., 2019; Singh et al., 2020a) Other studies have also focused on other acute phase proteins, including haptoglobin and AGP, as sources of markers for pancreatic diseases (Higai et al., 2003; Nakano et al., 2008; Sarrats et al., 2010; Kontro et al., 2014; Balmaña et al., 2016; Mancera-Arteu et al., 2019; Keser et al., 2021).