HP and infection: Increased expression of several acute-phase reactants, such as amyloid A proteins (Saa1, Saa2, Saa3), amyloid P component serum (Apcs), haptoglobin (Hp), hemopexin (Hpx) and orosomucoid 2 (Orm2), was observed only in CerS2-null mice after transfer of iNKT cells and infection with LCMV (Figure 2F).