3.抗核抗体（antinuclearantibodies，ANAs）是与各种细胞核成分反应的自身抗体的总称，包括针对脱氧核糖核酸（DNA）、可提取的核蛋白（snENP）、核糖核酸（RNA）、组蛋白、酶及核仁等细胞核成分的抗体。
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