Moore E C, Laffin R J, Tomasi T, Pickering R J, Radl J, Meuwissen H J
Acta Paediatr Scand. 1979 May;68(3):453-8. doi: 10.1111/j.1651-2227.1979.tb05038.x.
The IgA system in a patient with SCID and ADA deficiency showed heterogeneity. Serum IgA and stool secretory IgA (SIgA) levels were normal, but with altered kappa/lambda and A1/A2 subclass ratios; IgA in saliva and urine was deficient. Amounts of secretory component were normal. Jejunal and rectal biopsies showed prominent lymphonodular hyperplasia, but no cells containing IgA. A normal serum IgA level therefore does not always predict an intact secretory IgA system.
患有重症联合免疫缺陷病(SCID)和腺苷脱氨酶(ADA)缺乏症的患者的IgA系统表现出异质性。血清IgA和粪便分泌型IgA(SIgA)水平正常,但κ/λ和A1/A2亚类比例发生改变;唾液和尿液中的IgA缺乏。分泌成分的量正常。空肠和直肠活检显示明显的淋巴小结增生,但未发现含IgA的细胞。因此,正常的血清IgA水平并不总是预示着分泌型IgA系统完整。