Autoantibodies bind solubilized calcium channel-omega-conotoxin complexes from small cell lung carcinoma: a diagnostic aid for Lambert-Eaton myasthenic syndrome.

Autoantibodies bind solubilized calcium channel-omega-conotoxin complexes from small cell lung carcinoma: a diagnostic aid for Lambert-Eaton myasthenic syndrome.
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自身抗体结合来自小细胞肺癌的溶解的钙通道-omega-芋螺毒素复合物:兰伯特-伊顿肌无力综合征的诊断辅助。

DOI:
10.1016/s0025-6196(12)65705-x
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发表时间:
1989
影响因子:
8.9
通讯作者:
Lambert,EH
Lambert,EH
中科院分区:
医学2区
文献类型:
--
作者:
Lennon,VA;Lambert,EH

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在52例Lambert-Eaton肌无力综合征(LES)患者中,通过放射免疫测定法在27例患者中发现血清自身抗体与从小细胞肺癌(SCC)中提取的电压门控Ca 2+通道(VGCC)复合物的可溶性ω-芋螺毒素结合组分特异性结合。这些抗体未发现在43名对照患者与其他神经系统疾病,包括重症肌无力,周围神经病变,肌萎缩侧索硬化症,或在9例内分泌自身免疫,但他们发现在2 21例对照患者SCC没有LES的历史,其中1人有严重的自主神经病变。有原发性肺癌证据的LES患者(76%)的血清阳性率高于其他肿瘤或无癌症证据的患者(30%)。从来源于患有和不患有LES的患者的SCC肿瘤系和人神经母细胞瘤系提取的抗原产生高度相关的结果。结肠癌的对照提取物(来自患有LES的患者)产生阴性结果。这些数据暗示肿瘤相关的VGCC作为LES患者亚组的自身免疫刺激,并提供了SCC中VGCC复合物是某些LES抗体靶点的第一个直接证据。血清学试验描述应是一个有用的辅助诊断LES。
Serum autoantibodies found by radioimmunoassay in 27 of 52 patients with the Lambert-Eaton myasthenic syndrome (LES) bound specifically to a soluble ω-conotoxin binding component of a voltage-gated Ca2+channel (VGCC) complex extracted from small cell lung carcinoma (SCC). These antibodies were not found in 43 control patients with other neurologic diseases, including myasthenia gravis, peripheral neuropathies, and amyotrophic lateral sclerosis, or in 9 patients with endocrine autoimmunity, but they were found in 2 of 21 control patients with SCC without a history of LES, 1 of whom had severe autonomic neuropathy. Seropositivity was more frequent in patients with LES who had evidence of a primary lung cancer (76%) than in those with other neoplasms or without evidence of cancer (30%). Antigens extracted from SCC tumor lines derived from patients with and without LES and from a human neuroblastoma line yielded results that were highly correlated. A control extract of colonic carcinoma (derived from a patient with LES) yielded negative results. The data implicate a tumor-associated VGCC as the autoimmunizing stimulus in a subset of patients with LES and provide the first direct evidence that the VGCC complex in SCC is a target for some LES antibodies. The serologic test described should be a useful aid in diagnosing LES.
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