Cytotoxicity of amyloidogenic immunoglobulin light chains in cell culture.

Cytotoxicity of amyloidogenic immunoglobulin light chains in cell culture.
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DOI:
10.1038/cddis.2010.75
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发表时间:
2010-11-11
影响因子:
9
通讯作者:
--
中科院分区:
生物学1区
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--
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轻链淀粉样变性(AL)是一种破坏性的蛋白质错误折叠疾病,其特征在于骨髓中浆细胞的异常增殖,所述浆细胞分泌单克隆免疫球蛋白轻链,所述单克隆免疫球蛋白轻链错误折叠并形成淀粉样纤维,从而引起器官衰竭和死亡。关于不同蛋白质错误折叠疾病的大量报道表明,由淀粉样蛋白形成的可溶性寡聚物种类对细胞具有相当大的毒性。然而,还没有很好地确定在AL患者循环中发现的可溶性免疫球蛋白轻链物质是否对靶器官中的细胞具有毒性。我们确定了两个充分表征的轻链可变结构域蛋白质的细胞毒性,从心脏AL患者和他们相应的种系蛋白,没有体细胞突变。我们的研究结果表明,我们所表征的AL蛋白的可溶性形式对心肌细胞是有毒的,并且在细胞培养物中发现的物种在很大程度上对应于这些患者循环中存在的物种。
Light-chain amyloidosis (AL) is a devastating protein-misfolding disease characterized by abnormal proliferation of plasma cells in the bone marrow that secrete monoclonal immunoglobulin light chains that misfold and form amyloid fibrils, thus causing organ failure and death. Numerous reports on different protein-misfolding diseases show that soluble oligomeric species populated by amyloidogenic proteins can be quite toxic to cells. However, it is not well established whether the soluble immunoglobulin light-chain species found in circulation in patients with AL are toxic to cells in target organs. We determined the cellular toxicity of two well-characterized light-chain variable domain proteins from cardiac AL patients and their corresponding germline protein, devoid of somatic mutations. Our results show that the soluble form of the AL proteins we characterized are toxic to cardiomyocytes, and that the species found in cell culture correspond, for the most part, to the species present in circulation in these patients.
DOI: 10.1016/s0140-6736(10)60482-5
发表时间: 2010-05-15
期刊: LANCET
影响因子: 168.9
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Dispenzieri, Angela;Katzmann, Jerry A.;Kyle, Robert A.;Larson, Dirk R.;Melton, L. Joseph, III;Colby, Colin L.;Therneau, Terry M.;Clark, Raynell;Kumar, Shaji K.;Bradwell, Arthur;Fonseca, Rafael;Jelinek, D. F.;Rajkumar, S. Vincent
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发表时间: 2009-05-29
影响因子: 5.6
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通讯作者: Ramirez-Alvarado, Marina
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发表时间: 2010-03-02
影响因子: 11.1
作者:
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通讯作者: Liao, Ronglih