IGHA1 and IgA glomerulonephritis: First discovered by Berger and Hinglais in 1968 [206], IgA nephropathy (IgAN, alias Berger’s disease) describes the deposition of galactose-deficient IgA1 in the glomerular mesangium and subsequent glomerulonephritis due to the formation of inflammatory immune complexes in the kidney [207,208,209].