Snippe H, Van Houte A J, Inman J K, Lizzio E F, Merchant B
Immunology. 1984 May;52(1):87-96.
CBA/N mice harbour an X-linked B cell defect which is transmitted by CBA/N female mice to their hybrid male progeny. These mice mount normal responses to thymus-dependent (TD) and some thymus-independent (TI-1) antigens, while the response to TI-2 antigens is absent. Hapten-specific plaque-forming cell (PFC) responses to TD antigens can be blockaded by concomitant exposure of these mice to TI-2 antigens bearing the same hapten. This paper investigates in defective mice the blockade of their response to TNP3-LPS (trinitrophenylated lipopolysaccharide, a TI-1 antigen), imposed by DNP59-Ficoll (dinitrophenylated Ficoll, a TI-2 antigen). The effectiveness of the blocking agent, DNP59-Ficoll, differed in various inbred mouse strains: CBA/N X C3H/HeN F1 male greater than CBA/N female greater than CBA/N X C3H/HeN F1 female. The role of T cells in the observed hapten-specific blockade phenomenon was investigated using athymic CBA/N nude mice and a B cell tolerogen. Our findings indicate that T cell participation is not essential for the blockade of CBA/N PFC responses and they suggest that direct blockade of TI- and TD-responsive B cell populations is likely to occur.
CBA/N小鼠存在一种X连锁的B细胞缺陷,该缺陷由CBA/N雌性小鼠传递给它们的杂交雄性后代。这些小鼠对胸腺依赖性(TD)抗原和一些胸腺非依赖性(TI-1)抗原产生正常反应,而对TI-2抗原则无反应。对TD抗原的半抗原特异性空斑形成细胞(PFC)反应可被这些小鼠同时暴露于带有相同半抗原的TI-2抗原所阻断。本文研究了在缺陷小鼠中,由DNP59-菲可(二硝基苯基化菲可,一种TI-2抗原)对其对TNP3-LPS(三硝基苯基化脂多糖,一种TI-1抗原)反应的阻断作用。阻断剂DNP59-菲可在不同近交系小鼠中的效果不同:CBA/N×C3H/HeN F1雄性大于CBA/N雌性大于CBA/N×C3H/HeN F1雌性。使用无胸腺的CBA/N裸鼠和一种B细胞耐受原研究了T细胞在观察到的半抗原特异性阻断现象中的作用。我们的研究结果表明,T细胞参与对于CBA/N PFC反应的阻断并非必不可少,并且提示TI和TD反应性B细胞群体可能发生直接阻断。