Novel antibodies reveal inclusions containing non-native SOD1 in sporadic ALS patients.

Novel antibodies reveal inclusions containing non-native SOD1 in sporadic ALS patients.
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DOI:
10.1371/journal.pone.0011552
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发表时间:
2010-07-14
期刊:
影响因子:
3.7
通讯作者:
Brännström T
Brännström T
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Forsberg K;Jonsson PA;Andersen PM;Bergemalm D;Graffmo KS;Hultdin M;Jacobsson J;Rosquist R;Marklund SL;Brännström T

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CuZn-超氧化物歧化酶(SOD 1)的突变导致肌萎缩侧索硬化症(ALS),并在6%的ALS患者中发现。非天然和聚集倾向形式的突变SOD 1被认为是引发疾病的原因。通过酶联免疫吸附试验和免疫捕获方法,在兔和鸡中产生了两组新的抗体,其针对沿着人SOD 1序列间隔的肽,显示出对变性SOD 1具有特异性。这些被用来检查缺乏酶突变的ALS患者脊髓中的SOD 1。小颗粒的SOD 1免疫反应阳性包涵体被发现在脊髓运动神经元的所有37个散发性和家族性ALS患者的研究,但只有稀疏的28个神经退行性疾病和2 19个非神经系统控制患者。通过共聚焦显微镜发现颗粒状包涵体与溶酶体的标记物部分共定位,但不与含有TAR DNA结合蛋白-43、泛素或内质网、自噬体或线粒体的标记物的包涵体共定位。在SOD 1突变携带者和脊髓延髓肌萎缩症(SBMA)患者中也发现了颗粒状包涵体,它们是在野生型样D90 A突变纯合子的ALS患者中检测到的主要包涵体类型。研究结果表明,SOD 1可能参与缺乏酶突变的患者的ALS发病机制。
Mutations in CuZn-superoxide dismutase (SOD1) cause amyotrophic lateral sclerosis (ALS) and are found in 6% of ALS patients. Non-native and aggregation-prone forms of mutant SOD1s are thought to trigger the disease. Two sets of novel antibodies, raised in rabbits and chicken, against peptides spaced along the human SOD1 sequence, were by enzyme-linked immunosorbent assay and an immunocapture method shown to be specific for denatured SOD1. These were used to examine SOD1 in spinal cords of ALS patients lacking mutations in the enzyme. Small granular SOD1-immunoreactive inclusions were found in spinal motoneurons of all 37 sporadic and familial ALS patients studied, but only sparsely in 3 of 28 neurodegenerative and 2 of 19 non-neurological control patients. The granular inclusions were by confocal microscopy found to partly colocalize with markers for lysosomes but not with inclusions containing TAR DNA binding protein-43, ubiquitin or markers for endoplasmic reticulum, autophagosomes or mitochondria. Granular inclusions were also found in carriers of SOD1 mutations and in spinobulbar muscular atrophy (SBMA) patients and they were the major type of inclusion detected in ALS patients homozygous for the wild type-like D90A mutation. The findings suggest that SOD1 may be involved in ALS pathogenesis in patients lacking mutations in the enzyme.
DOI: 10.1093/brain/awh704
发表时间: 2006-02-01
期刊: BRAIN
影响因子: 14.5
作者:
Jonsson, PA;Graffmo, KS;Marklund, SL
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发表时间: 2006-12-01
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发表时间: 1995-06-01
期刊: BRAIN
影响因子: 14.5
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发表时间: 1995-05-01
期刊: NATURE GENETICS
影响因子: 30.8
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发表时间: 2007-07-01
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