Accumulation of CD5(+)CD19(+) B lymphocytes expressing PD-1 and PD-1L in hypertrophied pharyngeal tonsils.

Accumulation of CD5(+)CD19(+) B lymphocytes expressing PD-1 and PD-1L in hypertrophied pharyngeal tonsils.
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DOI:
10.1007/s10238-015-0385-y
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发表时间:
2016-11
影响因子:
4.6
通讯作者:
Giannopoulos, Krzysztof
Giannopoulos, Krzysztof
中科院分区:
医学3区
文献类型:
--
作者:
Wlasiuk, Paulina;Niedzielski, Artur;Skorka, Katarzyna;Karczmarczyk, Agnieszka;Zaleska, Joanna;Zajac, Malgorzata;Putowski, Maciej;Pac-Kozuchowska, Elzbieta;Giannopoulos, Krzysztof

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程序性死亡-1 (PD-1) 是最重要的抑制性共受体之一,主要在活化的 T 和 B 淋巴细胞上表达,其表达可以通过伴随慢性或复发性扁桃体炎的永久性抗原刺激来维持。使用流式细胞术对 57 名儿童肥大的扁桃体进行 PD-1 和 PD-1L 的表达分析。我们观察到肥大扁桃体的某些淋巴细胞亚群上存在 PD-1 和 PD-1L 高表达;在 T 细胞中,CD4+ 细胞 (70.3%) 上的 PD-1 蛋白水平表达高于 CD8+ 细胞 (35%)。有趣的是,在 CD19+ B 淋巴细胞 (6.5%) 上观察到 PD-1 表达有限,而 CD5+CD19+ B 细胞过表达 PD-1 (52.5%)。此外,CD5+CD19+ B 细胞 (16.5%) 上的 PD-1L 表达也高于 CD19+ B 细胞 (3.5%),CD4+ T 细胞 (20%) 上的 PD-1L 表达高于 CD8+ T 细胞 (10%)。 PD-1 和 PD-1L 表达仅在 CD5+CD19+ 细胞上相关。总之,T 细胞和 B 细胞上 PD-1 和 PD-1L 的高表达可能代表扁桃体炎患者免疫系统适应慢性抗原暴露的标志。
Programmed death-1 (PD-1) is one of the most important inhibitory co-receptors expressed predominantly on activated T and B lymphocytes whose expression could be sustained by permanent antigenic stimulation accompanying chronic or recurrent tonsillitis. The expression of PD-1 and PD-1L was analyzed using flow cytometry on hypertrophied tonsils collected from 57 children. We observed high expression of PD-1 and PD-1L on certain lymphocytes subpopulations of hypertrophied tonsils; among T cells, the expression of PD-1 on protein level was higher on CD4+ cells (70.3 %) than on CD8+ cells (35 %). Interestingly, a limited expression of PD-1 was observed on CD19+ B lymphocytes (6.5 %), while CD5+CD19+ B cells overexpressed PD-1 (52.5 %). Moreover, the expression of PD-1L was also higher on CD5+CD19+ B cells (16.5 %) than on CD19+ B cells (3.5 %) and on CD4+ T cells (20 %) than on CD8+ T cells (10 %). PD-1 and PD-1L expressions correlated only on CD5+CD19+ cells. In conclusion, high expression of PD-1 and PD-1L on T and B cells could represent hallmark of immune system adaptation to chronic antigenic exposition in patients with tonsillitis.
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