Long-term B cell depletion in murine lupus eliminates autoantibody-secreting cells and is associated with alterations in the kidney plasma cell niche.

Long-term B cell depletion in murine lupus eliminates autoantibody-secreting cells and is associated with alterations in the kidney plasma cell niche.
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DOI:
10.4049/jimmunol.1302003
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发表时间:
2014-04-01
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
通讯作者:
Anolik JH
Anolik JH
中科院分区:
其他
文献类型:
--
作者:
Wang W;Rangel-Moreno J;Owen T;Barnard J;Nevarez S;Ichikawa HT;Anolik JH

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由自身反应性浆细胞 (PC) 产生的双链 DNA (dsDNA) 自身抗体是系统性红斑狼疮 (SLE) 的标志,在疾病发病机制中发挥着关键作用。最近的数据表明,自身反应性 PC 不仅积聚在淋巴组织中,而且还积聚在狼疮性肾炎发炎的肾脏中。我们假设抗 CD20(利妥昔单抗)介导的 B 细胞耗竭 (BCD) 在 SLE 中的不同疗效可能与对肾脏中自身反应性 PC 没有影响有关。在此,我们报道了狼疮易感小鼠肾脏中自身反应性 dsDNA 抗体分泌细胞 (ASC) 的富集(高达 ASC 的 40%),同时脾生发中心 (GC) 和 PC 逐渐增加,以及 PC 生存因子(BAFF、APRIL 和 IL6)和 PC 吸引趋化因子 (CXCL12) 的肾脏表达增加。抗CD20短期治疗(4周),不同解剖位置的抗dsDNA和IgG ASC均没有减少。然而,长期治疗(12 周)显着减少了 IgG 和 dsDNA 特异性 ASC。此外,长期治疗显着减少了脾脏GC和PC的生成,并意外地减少了肾脏中PC存活因子的表达。这些结果表明,延长 BCD 可能会改变肾脏中 PC 的生存生态位,调节自身反应性 PC 的积累和维持。
Autoantibodies to double-stranded DNA (dsDNA), produced by auto-reactive plasma cells (PC), are a hallmark of systemic lupus erythematosus (SLE) and play a key role in disease pathogenesis. Recent data suggests that auto-reactive PC accumulate not only in lymphoid tissues but also in the inflamed kidney in lupus nephritis. We hypothesized that the variable efficacy of anti-CD20 (rituximab) mediated B cell depletion (BCD) in SLE may be related to the absence of an effect on auto-reactive PCs in the kidney. Here we report that an enrichment of auto-reactive dsDNA antibody secreting cells (ASC) in the kidney of lupus-prone mice (up to 40% of the ASCs) coincided with a progressive increase in splenic germinal centers (GC) and PCs and an increase in renal expression for PC survival factors (BAFF, APRIL and IL6) and PC attracting chemokines (CXCL12). Short-term treatment with anti-CD20 (4 weeks), neither decreased anti-dsDNA nor IgG ASCs in different anatomical locations. However, long-term treatment (12 weeks) significantly reduced both IgG- and dsDNA specific ASCs. In addition, long-term treatment substantially decreased splenic GC- and PC generation and unexpectedly reduced the expression for PC survival factors in the kidney. These results suggest that prolonged BCD may alter the PC survival niche in the kidney, regulating the accumulation and maintenance of auto-reactive PCs.
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