IGHA1 and triple-A syndrome: The results showed that there was a significant increase of IGA2 levels in AAA patients relative to controls (489 ± 38 vs 344 ± 36 mg/L, p < 0.01), whereas no significant differences were observed for IGA1 (1,788 ± 127 vs 1,974 ± 216 mg/L, p = NS) or IGA (2,277 ± 142 vs 2,319 ± 243 mg/L, p = NS) (Fig. 3A).