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核透性硬皮症自身抗体抑制了拓聚酶1分裂复合体的形成

Christopher K May¹, Philip W Noble¹, Erica L Herzog²

¹Department of Therapeutic Radiology, Yale School of Medicine, 15 York St., New Haven, CT, 06520, USA.

Biochemical and biophysical research communications

|May 17, 2024

概括

研究人员发现了一种针对扩散性皮肤性系统性硬化症 (dcSSc) 的新型自抗体,该自抗体向Topoisomerase 1 (Top1). 这种抗体穿透细胞,抑制Top1功能,并可能导致dcSSc的发病.

科学领域:

免疫学免疫学免疫学
分子生物学分子生物学
类风湿病学类风湿病学

背景情况:

扩散性皮肤全身性硬化症 (dcSSc) 是一种侵袭性的自身免疫性疾病.
在dcSSc病理生理学中,抗拓酶1 (Top1) 自体的作用基本上是未知的.
细胞核中的酶Top1之前被认为是抗体无法接触的.

研究的目的:

调查dcSSc.中的抗Top1自身抗体的存在和功能.
为了确定这些自身抗体是否可以透到活细胞并影响Top1活动.
探索抗Top1自身抗体对dcSSc病原发生的潜在贡献.

主要方法:

从dcSSc患者中分离出一个单个产生抗Top1自身抗体的B细胞克隆.
评估自身抗体透活细胞并定位在细胞核中的能力.
功能性测试,以评估自身抗体对Top1分裂复合体形成的影响.

主要成果:

发现一种来自患者的抗Top1自身抗体能够穿透活细胞并进入细胞核.
这种自身抗体抑制了Top1裂解复合物的形成.
这种机制不同于现有的癌症疗法,这些疗法捕获了Top1裂解复合体.

结论:

这一发现支持了反Top1自身抗体对dcSSc.细胞功能障碍有助于细胞功能障碍的假设.
已经确定了一种新的细胞透性结核病抗Top1自身抗体.
这种抗体作为一种有价值的研究工具,用于研究抗Top1自身抗体在硬化皮质炎中的作用.

关键词:

自动抗体是一种自身抗体.硬化性皮质是一种硬化性皮质.系统性硬化症系统性硬化症拓糖酶是一种多糖酶.

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Topoisomerases are divided into two main types. ...

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For successful DNA replication, the unwinding of double-stranded DNA must be accompanied by stabilization and protection of the separated single strands of the DNA. This crucial task is performed by single-strand DNA-binding (SSB) proteins. They bind to the DNA in a sequence-independent manner, which means that the nitrogenous bases of the DNA need not be present in a specific order for binding of SSB proteins to it. The binding of SSB proteins straightens single-stranded DNA (ssDNA) and makes...