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Tertiary lymphoid structure related B-cell IgE isotype switching and secondary lymphoid organ linked IgE production in mouse allergy model.
BMC Immunology ( IF 2.9 ) Pub Date : 2020-08-07 , DOI: 10.1186/s12865-020-00376-7
Dmitrii Borisovich Chudakov 1 , Dmitrii Yuryevich Ryasantsev 1 , Daria Sergeevna Tsaregorotseva 2 , Olga Dmitrievna Kotsareva 1 , Gulnar Vaisovna Fattakhova 1 , Elena Viktorovna Svirshchevskaya 1
Affiliation  

Numerous data obtained by different research laboratories indicate that specific IgE production is triggered independently of specific IgG or IgA ones and so it is not linked to fully matured germinal centers formation in the secondary lymphoid organs. The aim of this study was to clarify whether specific IgE production is triggered by low antigen doses administrated in tertiary tissues enriched by lymphoid structures. Ovalbumin (OVA) in different doses (100 ng to 10 μg) was administrated three times a week for 4–5 weeks intraperitoneally (i.p.) or subcutaneously (s.c.) to female BALB/c mice in the wither region which is enriched in fat-associated lymphoid clusters or in the foot pad region not containing them. OVA-specific IgE was predominantly induced by low but not high antigen doses and only after immunization into the withers. IgE isotype switching was triggered exclusively in the withers adipose tissue but not in the regional lymph nodes while mature IgE expressing cells were observed both in the withers and lymph nodes. Anti-proliferative genotoxic stress inducing drugs shifted the balance from IgG1 towards IgE production. Tertiary lymphoid structures possess unique environment where B-cell antibody isotype switching to IgE predominantly occurs. This phenomenon is partially explained by hampered proliferation of B-cells in these structures.

中文翻译:

小鼠过敏模型中与 B 细胞 IgE 同种型转换和次级淋巴器官相关的 IgE 产生相关的三级淋巴结构。

不同研究实验室获得的大量数据表明,特定 IgE 的产生独立于特定的 IgG 或 IgA 触发,因此它与次级淋巴器官中完全成熟的生发中心形成无关。本研究的目的是阐明特异性 IgE 的产生是否是由在富含淋巴结构的三级组织中施用的低抗原剂量触发的。将不同剂量(100 ng 至 10 μg)的卵清蛋白 (OVA) 每周 3 次通过腹膜内 (ip) 或皮下 (sc) 给药至富含脂肪的萎缩区域的雌性 BALB/c 小鼠,持续 4-5 周。相关淋巴簇或在不包含它们的足垫区域。OVA 特异性 IgE 主要由低但不是高抗原剂量诱导,并且仅在对马肩隆进行免疫后诱导。IgE 同种型转换仅在马肩隆脂肪组织中触发,但不在区域淋巴结中触发,而在马肩隆和淋巴结中均观察到成熟的 IgE 表达细胞。抗增殖性基因毒性应激诱导药物将平衡从 IgG1 转移到 IgE 生产。三级淋巴结构拥有独特的环境,其中主要发生 B 细胞抗体同种型转换为 IgE。这种现象的部分原因是这些结构中 B 细胞的增殖受阻。三级淋巴结构拥有独特的环境,其中主要发生 B 细胞抗体同种型转换为 IgE。这种现象的部分原因是这些结构中 B 细胞的增殖受阻。三级淋巴结构拥有独特的环境,其中主要发生 B 细胞抗体同种型转换为 IgE。这种现象的部分原因是这些结构中 B 细胞的增殖受阻。
更新日期:2020-08-08
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